Abstract:
Anti-neoplastic compositions consisting of one or more pterins, or derivatives or analogs thereof, selected from the group consisting of xanthopterin, isoxanthopterin and/or neopterin, and/or a derivative or analog thereof, and a method for the application thereof to a living creature in an amount and composition which, in the preferred embodiment, consists of substantially about 32 micrograms per milliliter xanthopterin and substantially about 16 micrograms per milliliter isoxanthopterin suspension diluted in an inert carrier and administered subcutaneously into the vicinity of the neoplasm with a frequency sufficient to inhibit the growth of the neoplasm.

Description:
This is a continuation of application Ser. No. 07/967,283, filed Oct. 27, 1992, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to anti-neoplastic compositions and methods for application thereof and, more particularly, to such compositions and methods which have been discovered to be of particular value in the treatment of tumors, particularly of the cancerous type. 
     2. Description of the Prior Art 
     Research has heretofore recognized the therapeutic value of certain pterins in the treatment of certain forms of neoplastic disease. For example, the DeGraw, Jr. et at. U.S. Pat. No. 4,393,064 discloses a process in composition for the treatment of leukemia using 10-deazaminopterin. Similarly, the DeGraw, Jr. et at. U.S. Pat. No. 4,753,939 discloses another process and composition for the treatment of leukemia employing 10-ethyl-10 deazaminopterin. Other pterin derivatives have been discovered to have properties beneficial in the treatment of certain diseases. For example, the Curtius et al. U.S. Pat. No. 4,758,571 discloses that L-erythro-5,6,7,8-tetrahydrobiopterin, L-sepiapterin, 1&#39;,2&#39;-diacetyl-5,6,7,8-tetrahydrobiopterin and 6-methyl-5,6,7,8-tetrahydropterin can beneficially be used in the treatment of patients having Parkinson&#39;s disease and of patients exhibiting depression. Still further, the Khaled et at. U.S. Pat. No. 4,820,706 discloses the use of pteridine derivatives in treating leukemia. 
     While the salutary effects of such compositions have been known, there has not heretofore previously been a composition of pterins which has exhibited the capability for reducing the volume of neoplastic masses in living creatures regardless of the type, volume or age of the neoplastic mass so as to offer the possibility of remedial treatment in substantially all physiological forms in which such neoplasms evidence themselves. 
     Therefore, it has long been known that it would be desirable to have anti-neoplastic compositions and methods for application thereof which are capable of therapeutically treating virtually all neoplasms regardless of the form, volume, location and state of development having application to humans and virtually all mammalian creatures and substantially without the detrimental effects characterized by conventional chemotherapy. 
     SUMMARY OF THE INVENTION 
     Therefore, it is an object of the present invention to provide anti-neoplastic compositions and methods for application thereof. 
     Another object is to provide such compositions and methods which can be therapeutically employed in the treatment of virtually all neoplasms operable to reduce both the volume of the masses and morbidity associated therewith. 
     Another object is to provide such compositions and methods which can remedially be employed in the treatment of such neoplasms in virtually all mammalian creatures including humans. 
     Another object is to provide such compositions and methods which can be employed with beneficial results irrespective of the type of neoplasm, the volume of the neoplasm, or the age thereof. 
     Another object is to provide such compositions and methods which can conveniently and dependably be employed using a substantially noninvasive means for application and one which is fully compatible with conventional medical techniques. 
     Another object is to provide such compositions and methods which can be administered without the detrimental side effects associated with conventional compositions and methods and which require a minimal amount of equipment and medical expertise in the application thereof. 
     Another object is to provide such compositions and methods which have such wide beneficial application as to constitute a virtually universal treatment for neoplasms. 
     These and other objects and advantages are achieved, in the preferred embodiment of the compositions and methods of the present invention, in an anti-neoplastic composition consisting essentially of an effective amount of a mixture of a pterin diluted in an inert carrier and applied in an amount and frequency sufficient to inhibit the growth of the neoplasm. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a diagrammatic view depicting the steps in the formulation of the compositions of the present invention and the method for the use thereof. 
     FIG. 2 is a diagrammatic view depicting the chemical structures of xanthopterin, isoxanthopterin and neopterin employed in the compositions and methods of the present invention. 
     FIG. 3 is a diagrammatic view depicting the formulation of representative analogs of xanthopterin, isoxanthopterin and neopterin employed in the compositions and methods of the present invention, the analogs respectively being 8-N-ethyl xanthopteridium iodide, 5-N-ethyl isoxanthopteridium iodide and 8-N-ethyl neopteridium iodide. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     First Embodiment 
     Referring more particularly to the drawings, the anti-neoplastic compositions and methods for application thereof of the present invention are shown diagrammatically in FIG. 1. The compositions are a formulation of a pterin selected from the group consisting of xanthopterin, isoxanthopterin, neopterin and derivatives and analogs thereof. It has been discovered that these three pterins and derivatives and analogs thereof, work together synergistically to demonstrate significant anti-neoplastic activity. One such analog is 8-ethyl-xanthopteridium iodide. While, as will subsequently be disclosed in greater detail, certain formulations of the compositions of the present invention have been found to evidence stronger responses against larger or smaller neoplasms, the beneficial effects over all are consistent and such variables are believed to constitute species of the invention having particular utility relative to neoplasms of specific characteristics, but otherwise evidencing remedial effects when applied to all neoplasms. 
     EXAMPLE I 
     In Example I, a mixture of substantially about 32 micrograms per milliliter xanthopterin and substantially about 16 micrograms per milliliter isoxanthopterin suspension were diluted in an inert carrier, preferably about 0.2 milliliters Mammalian Ringer&#39;s Solution. For convenience, this mixture will hereinafter be referred to as the &#34;XIpterin mixture&#34;. 
     Using the XIpterin mixture, a number of a strain of black mice identified as &#34;C58/J&#34; acquired from The Jackson Laboratory, Animal Resources of Bar Harbor, Me. were employed in laboratory tests. The C58/J strain of black mice has approximately a 90 per cent incidence of lymphocytic leukemia characterized by tumor masses in the thymus, spleen and lymph nodes. The mean latent period of mortality is 318 days, or 10.6 months, with tumors appearing as early as 5 months of age. The test mice were acquired at approximately 10 weeks of age from Jackson Laboratories. 
     The experimental data hereinafter set forth result from experiments on 42 of the C58/J black mice running in age from 22 to 31 weeks. Each mouse was randomly assigned to either the experimental or control group. Each mouse in the experimental group, which numbered 20 mice, received injections of the Xipterin mixture, consisting of 32 micrograms per milliliter xanthopterin and 16 micrograms per milliliter isoxanthopterin suspension in 0.2 milliliters Mammalian Ringer&#39;s Solution. The injections were administered subcutaneously. The mice in the control group, which numbered 22 mice, received subcutaneous injections of 0.2 milliliters Mammalian Ringer&#39;s Solution not containing a pterin or any other substance. The injection volumes were carefully controlled so that both groups received the same amounts. The injection schedule was as follows: 
     
         ______________________________________C58/J Injection Schedule   Injection         Injection     InjectionDate    Vol.     Date     Vol.   Date   Vol.______________________________________12/23/88   0.2 mL   05/04/89 0.2 mL 09/13/89                                   0.1 Ml01/03/89   0.2 Ml   05/06/89 0.2 mL 09/21/89                                   0.15 Ml01/06/89   0.2 Ml   05/09/89 0.2 mL 10/03/89                                   0.15 Ml01/10/89   0.2 Ml   05/11/89 0.2 mL 10/12/89                                   0.2 mL01/13/89   0.2 mL   05/13/89 0.2 mL 10/17/89                                   0.2 mL01/17/89   0.2 mL   05/15/89 0.2 mL 10/19/89                                   0.2 mL01/20/89   0.4 mL   05/16/89 0.2 mL 10/24/89                                   0.2 mL01/24/89   0.2 mL   05/18/89 0.2 mL 10/27/89                                   0.2 mL01/27/89   0.2 mL   05/20/89 0.2 mL 11/01/89                                   0.2 mL01/31/89   0.2 mL   05/22/89 0.2 mL 11/04/89                                   0.2 mL02/03/89   0.2 mL   05/23/89 0.2 mL 11/08/89                                   0.2 mL02/07/89   0.2 mL   05/25/89 0.2 mL 11/11/89                                   0.2 mL02/10/89   0.2 mL   05/27/89 0.2 mL 11/15/89                                   0.2 mL02/14/89   0.2 mL   05/29/89 0.2 mL 11/18/89                                   0.2 mL02/17/89   0.2 mL   05/30/89 0.2 mL 11/22/89                                   0.2 mL02/21/89   0.2 mL   06/01/89 0.2 mL 12/02/89                                   0.2 mL04/11/89   0.2 mL   06/27/89 0.2 mL 12/06/89                                   0.2 mL04/12/89   0.2 mL   06/30/89 0.2 mL 12/09/89                                   0.2 mL04/13/89   0.2 mL   07/04/89 0.2 mL 12/13/89                                   0.2 mL04/14/89   0.2 mL   08/30/89 0.1 mL 12/16/89                                   0.2 mL04/19/89   0.2 mL   09/02/89 0.1 mL 12/20/89                                   0.2 mL05/02/89   0.2 mL   09/06/89 0.1 mL______________________________________ 
    
     The C58/J mice generally do not produce palpable tumors. Accordingly, during the course of the injection schedule, the responses of the mice in both the experimental and control groups was monitored by noting weight changes and evaluating the over all vigor of each mouse. In this manner, the researchers attempted to discern the therapeutic window of efficacy for the regimen of application of the XIpterin mixture. However, these indices proved to be unreliable for discerning the anti-cancer therapeutic effectiveness of the regimen on a day-by-day basis. 
     The age of mortality of each mouse was the critical dependent variable in this experiment. The data relative to age of mortality was analyzed using the one-tailed t-test on the mean life expectancies of the two groups of mice. This was done under the null hypothesis, H o  : M e  ≦M c , and using an ∞ (alpha)=0.05 to reject the null hypothesis, where M e  is the mean age of mortality of the experimental group and M c  is the mean age of mortality of the control group. 
     Other general observations were made and daily records kept. These observations included the position and size of any noticeable tumors for each mouse and necropsy results on each expired C58/J mouse. The necropsies included looking at the condition of the internal organs as well as for the presence of any internal tumors. The resulting data from Example I using all the mouse data are shown in Table 1 as follows: 
     
                       TABLE 1______________________________________C58/J Female MiceUnpaired t-Test X.sub.1 : Mouse Assignment Y.sub.1 : Life______________________________________ExpectancyDF:        Unpaired t Value:                      Prob. (1-tail):______________________________________40         -.727           .2358______________________________________Group:    Count:   Mean:    Std. Dev.:                                Std. Error:______________________________________Control   22       290.227  77.003   16.417Experimental     20       308.75   88.145   19.71______________________________________ 
    
     As shown in Table 1, the mean age of mortality of the experimental group of C58/J mice was increased by 6.4%. This increase, however, was not believed significant (p=0.2358). Tables 2, 3, 4, 5 and 6 show the same data successively trimmed for robustness; that is, in Table 2 the high and low values are thrown out from both the experimental and control groups; in Table 3 the next high and low values for each group were excluded from the analysis; and in Table 4 the next high and low values for each group were eliminated. The analyses shown in Tables 5 and 6 were similarly trimmed. As can be seen, the significance of the test improves with the robustness of the analysis (p=0.1213 in Table 5, with a 7.7% increase in life expectancy). 
     
                       TABLE 2______________________________________C58/J Female MiceUnpaired t-Test X.sub.1 : Mouse Assignment Y.sub.1 : Life Expectancy -Robust______________________________________DF:        Unpaired t Value:                      Prob. (1-tail):______________________________________36         -.84            .2032______________________________________Group:    Count:   Mean:    Std. Dev.:                                Std. Error:______________________________________Control   20       286.25   63.755   14.256Experimental     18       304.778  72.221   17.023______________________________________ 
    
     
                       TABLE 3______________________________________C58/J Female MiceUnpaired t-Test X.sub.1 : Mouse Assignment Y.sub.1 : Life Expectancy -Robust 2______________________________________DF:        Unpaired t Value:                      Prob. (1-tail):______________________________________32         -.894           .1889______________________________________Group:    Count:   Mean:    Std. Dev.:                                Std. Error:______________________________________Control   18       285.111  58.79    13.857Experimental     16       303.062  57.984   14.496______________________________________ 
    
     
                       TABLE 4______________________________________C58/J Female MiceUnpaired t-Test X.sub.1 : Mouse Assignment Y.sub.1 : Life Expectancy -Robust 3______________________________________DF:        Unpaired t Value:                      Prob. (1-tail):______________________________________28         -1.038          .1539______________________________________Group:    Count:   Mean:    Std. Dev.:                                Std. Error:______________________________________Control   16       284.562  53.79    13.447Experimental     14       304.429  50.468   13.488______________________________________ 
    
     
                       TABLE 5______________________________________C58/J Female MiceUnpaired t-Test X.sub.1 : Mouse Assignment Y.sub.1 : Life Expectancy -Robust 4______________________________________DF:        Unpaired t Value:                      Prob. (1-tail):______________________________________24         -1.198          .1213______________________________________Group:    Count:   Mean:    Std. Dev.:                                Std. Error:______________________________________Control   14       284      47.839   12.786Experimental     12       305.917  44.844   12.945______________________________________ 
    
     
                       TABLE 6______________________________________C58/J Female MiceUnpaired t-Test X.sub.1 : Mouse Assignment Y.sub.1 : Life Expectancy -Robust 5______________________________________DF:        Unpaired t Value:                      Prob. (1-tail):______________________________________20         -1.149          .132______________________________________Group:    Count:   Mean:    Std. Dev.:                                Std. Error:______________________________________Control   12       284.833  44.472   12.838Experimental     10       305.8    40.216   12.717______________________________________ 
    
     The raw data of Example I is shown in the following corresponding Tables 1A, 2A, 3A, 4A, 5A and 6A where Table 1A contains the complete data for Table 1; Table 2A contains the complete data for Table 2, and so on. 
     
                       TABLE 1A______________________________________Complete DataAge of Expiration (Experimental)              Age of Expiration (Control)in descending orderin descending order______________________________________512                478456                392386                377369                371368                342366                334362                330345                324312                320308                313289                305280                294276                272269                267251                222245                221222                216201                216181                206177                202              201              182mean = 308.8 days  mean = 290.2 daysUnpaired t-Value (df = 40) = -.727p (one-tail) = .24______________________________________ 
    
     
                       TABLE 2A______________________________________Robust-1 DataAge of Expiration (Experimental)              Age of Expiration (Control)in descending orderin descending order______________________________________.                  .456                392386                377369                371368                342366                334362                330345                324312                320308                313289                305280                294276                272269                267251                222245                221222                216201                216181                206.                  202              201              .mean = 304.8 days  mean = 286.2 daysUnpaired t-Value (df = 36) = -.84p (one-tail) = .20______________________________________ 
    
     
                       TABLE 3A______________________________________Robust-2 DataAge of Expiration (Experimental)              Age of Expiration (Control)in descending orderin descending order______________________________________.                  ..                  .386                377369                371368                342366                334362                330345                324312                320308                313289                305280                294276                272269                267251                222245                221222                216201                216.                  206.                  202              .              .mean = 303.1 days  mean = 285.1 daysUnpaired t-Value (df = 32) = -.894p (one-tail) = .19______________________________________ 
    
     
                       TABLE 4A______________________________________Robust-3 DataAge of Expiration (Experimental)              Age of Expiration (Control)in descending orderin descending order______________________________________.                  ..                  ..                  .369                371368                342366                334362                330345                324312                320308                313289                305280                294276                272269                267251                222245                221222                216.                  216.                  206.                  .              .              .mean = 304.4 days  mean = 284.6 daysUnpaired t-Value (df = 28) = -1.038p (one-tail) = .15______________________________________ 
    
     
                       TABLE 5A______________________________________Robust-4 DataAge of Expiration (Experimental)              Age of Expiration (Control)in descending orderin descending order______________________________________.                  ..                  ..                  ..                  .368                342366                334362                330345                324312                320308                313289                305280                294276                272269                267251                222245                221.                  216.                  216.                  ..                  .              .              .mean = 305.9 days  mean = 284.0 daysUnpaired t-Value (df = 24) = -1.198p (one-tail) = .12______________________________________ 
    
     
                       TABLE 6A______________________________________Robust-5 DataAge of Expiration (Experimental)              Age of Expiration (Control)in descending orderin descending order______________________________________.                  ..                  ..                  ..                  ..                  .366                334362                330345                324312                320308                313289                305280                294276                272269                267251                222.                  221.                  216.                  ..                  ..                  .              .              .mean = 305.8 days  mean = 284.8 daysUnpaired t-Value (df = 20) = -1.149p (one-tail) = .13______________________________________ 
    
     EXAMPLE II 
     The same XIpterin mixture of Example I was employed in Example II on a strain of mice identified as &#34;C3H/Ou&#34; purchased from The Jackson Laboratory. The C3H/Ou mice produce externally palpable mammary tumors. One hundred percent (100% ) of this strain of mice are reported to produce mammary tumors by 44 weeks of age. As noted, the mammary tumors produced by this mouse strain are easily palpable and measurable using a caliper. 
     In this example, retired female C3H/Ou breeders were purchased along with information relating to the date of birth of each mouse and to the number of litters each had had. The mice were first housed for evaluation and then introduced into the experiment in pairs as each produced a palpable tumor. Initially, each C3H/Ou mouse was introduced into the experiment when at least one of its tumors reached 10 millimeters in diameter. After the few mice were so introduced into the experiment, the criteria were modified to the extent that each mouse was introduced as soon as it presented any palpable tumor. 
     The experimental mice were labeled AE, BE, CE, DE, FE, GE and HE wherein, of course, the &#34;E&#34; identifies a mouse of the experimental group. Each of the mice of the experimental group was started on the XIpterin mixture by subcutaneous injection in accordance with the schedule previously described in reference to Example I. To reiterate, the XIpterin mixture consists of 32 micrograms per milliliter xanthopterin and 16 micrograms per milliliter isoxanthopterin suspension in 0.2 milliliters Mammalian Ringer&#39;s Solution. The control mice were labeled AC, BC, CC, DC, EC, FC, GC and HC wherein, of course, the &#34;C&#34; signifies the control group. The mice of the control group were given identical subcutaneous injections in accordance with the same regimen as that of the experimental group. However, the injections used Mammalian Ringer&#39;s Solution without the XIpterin mixture or any other substance. 
     Daily animal weight and tumor diameter measurements were recorded for each mouse. The longest diameters for non-spherical tumors were initially recorded, but after a few mice, the average tumor diameters for the few non-spherical tumors which arose were recorded. This approach was adopted because the data was used to calculate tumor volumes under the assumption that the tumors were spherical. 
     Tables 7A through 7H are summaries of the 8 C3H/Ou mice of the experimental and control groups of the test of Example II analyzed in this manner. 
     The data which shows the manner in which the test results were evaluated. Briefly, total tumor volumes were calculated daily and the daily differences between the paired experimental and control mice were calculated. Then a simple linear regression was calculated and the slope of the regression was used as the dependent measure of anti-tumor efficacy. 
     
                       TABLE 7A______________________________________Mouse Pair - A                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     974.4        523.6        450.82     1317.2       606.2        711.03     755.5        539.5        216.04     1022.7       572.2        450.55     1231.9       659.6        572.36     1531.2       623.6        907.57     1949.9       882.4        1067.58     1987.9       882.4        1105.59     1732.1       1663.3       68.810    1767.2       1697.5       69.811    2309.7       1177.2       1132.512    2226.2       1259.9       966.313    2026.4       1204.3       822.114    1767.2       1732.1       35.115    2482.8       2395.2       87.616    3209.0       2309.7       899.3______________________________________ 
    
     
                       TABLE 8B______________________________________Mouse Pair - B                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     1225.9       523.6        702.32     1637.8       523.6        1114.23     1269.6       641.5        628.24     1276.7       735.7        541.05     1444.0       1259.9       184.16     1276.7       1177.2       99.57     1408.5       1259.9       148.78     1487.1       1346.4       140.79     885.5        1406.3       -520.710    1381.7       1531.2       -149.411    1601.4       1875.4       -274.012    1421.1       1976.8       -555.613    1417.6       2202.6       -785.014    1279.9       2976.0       -1696.115    1444.8       2625.1       -1180.316    1187.4       3308.0       -2120.617    1606.6       2685.6       -1079.018    1533.2       2687.6       -1154.419    1903.3       4402.9       -2499.720    3839.7       3389.6       450.221    3076.4       3855.8       -779.422    4327.1       4024.5       302.623    5835.0       3612.1       2222.924    5192.6       4729.8       462.825    5224.7       4366.3       858.426    5216.6       5769.4       -552.827    5856.4       5959.6       -103.228    5449.3       6601.7       -1152.429    5918.0       7434.0       -1516.030    6379.3       7646.4       -1267.131    7278.7       8637.6       -1358.932    6956.7       9916.0       -2959.333    8979.2       9440.4       -461.234    10076.0      9904.1       171.935    10839.9      11089.2      -249.336    11030.1      12905.0      -1874.937    10823.8      13334.1      -2510.338    12217.3      15188.9      -2971.639    11087.4      15628.2      -4540.840    10173.8      13511.3      -3337.541    12934.1      12422.4      511.742    12968.1      14423.9      -1455.843    13354.9      12955.3      399.644    13279.0      14182.3      -903.3______________________________________ 
    
     
                       TABLE 7C______________________________________Mouse Pair - C                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     555.7        1764.0       -1208.32     882.4        1982.9       -1100.53     1124.1       1855.4       -731.34     641.5        1442.8       -801.35     623.6        2022.8       -1399.26     539.5        2279.5       -1740.07     678.1        3041.7       -2363.68     606.2        2853.9       -2247.79     775.8        3069.3       -2293.510    882.4        3416.1       -2533.711    1098.1       3254.8       -2156.712    1317.2       3404.3       -2087.213    1288.3       3733.0       -2444.614    1531.2       3689.0       -2157.815    2065.3       3778.2       -1712.916    2104.8       4303.3       -2198.517    1767.2       4572.1       -2804.418    2661.1       4324         -1662.219    4134.6       4613.4       -477.920    3615.3       7520.3       -3904.221    3296.3       8123.1       -482622    3756.8       9732.9       -5975.223    4696.0       8174.5       -3477.424    3696.6       9793.3       -6095.825    4263.1       9206.7       -4942.626    4575.3       10198.9      -5622.527    4684.0       11856.1      -7170.928    4852.9       7316.9       -2462.929    4997.8       9062.6       -4063.630    6433.3       7678         -1243.131    6700.0       8439.8       -1738.232    6823.1       12113.3      -5288.633    8708.7       13299.1      -4588.434    8514.4       11394.7      -2878.235    8275.5       11647        -3369.636    8315.5       11903.3      -3585.837    8825.7       12448.3      -3620.538    7529.3       18266        -10734.939    8708.9       24516.5      -15805.540    10153.4      19153.3      -8997.541    10266.1      16887.9      -6619.342    8969.3       18117.8      -9146.343    9360.4       27701.2      -18338.6______________________________________ 
    
     
                       TABLE 7D______________________________________Mouse Pair - D                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     572.2        333.1        239.12     492.8        288.7        204.13     463.3        268.1        195.24     421.2        278.3        142.95     477.9        278.3        199.66     606.2        333.1        273.17     623.6        448.9        174.78     838.6        407.7        430.99     755.5        675.5        80.110    735.7        642.5        93.111    860.3        1018.9       -158.612    998.4        849.7        148.713    998.4        905.3        93.014    1259.9       937.4        322.515    1288.3       1636.1       -347.716    1697.5       1490.0       207.517    1802.8       1788.8       14.018    1912.4       1777.0       135.419    1949.9       2258.2       -308.320    2065.3       2327.4       -262.121    2185.2       2213.7       -28.422    2395.2       2376.5       18.723    2352.2       2287.9       64.324    2482.8       2438.7       44.125    2572.6       2995.5       -422.926    2782.9       2969.5       -186.627    2953.9       3869.2       -915.328    3203.0       3645.8       -442.829    3302.6       4051.0       -748.430    3913.1       4121.3       -208.231    3836.2       3978.0       -141.932    4364.0       4435.7       -71.733    4844.1       4734.2       110.034    4853.1       5037.2       -184.135    5012.3       5348.2       -335.936    6110.7       5689.9       420.837    7031.4       6195.6       835.838    7335.0       6803.9       531.139    7648.1       7565.7       82.440    7898.2       8279.7       -381.541    9362.1       9656.6       -294.542    12818.9      8306.5       4512.343    14134.9      8726         5408.9______________________________________ 
    
     
                       TABLE 7E______________________________________Mouse Pair - E                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     310.4        44.6         265.82     124.8        57.9         66.93     195.4        54.4         141.14     179.6        54.4         125.25     220.9        69.5         151.46     278.3        92.0         186.37     239.1        172.0        67.08     268.1        137.3        130.89     905.2        118.9        786.410    770.5        130.9        639.611    1355.0       130.9        1224.112    1534.4       268.1        1266.313    1517.0       220.9        1296.014    1800.0       299.4        1500.615    2056.5       239.1        1817.516    2023.5       268.1        1755.417    2903.4       333.1        2570.318    2594.7       310.4        2284.419    2575.7       268.1        2307.620    2878.6       288.7        2589.921    2823.3       288.7        2534.622    3006.9       321.6        2685.423    3295.4       394.6        2900.824    3382.1       381.7        3000.425    4354.5       477.9        3876.626    4229.5       523.6        3705.927    4776.2       508.1        4268.128    5015.9       572.2        4443.729    5814.5       492.8        5321.730    6473.5       606.2        5867.331    6854.6       589.0        6265.632    7808.1       477.9        7330.233    .            .            .34    .            .            .35    9146.7       623.6        8523.136    11442.3      492.8        10949.537    12232.6      407.7        11824.938    11782.7      463.3        11319.439    13772.0      523.6        13248.440    12930.7      492.8        12437.941    12956.9      641.5        12315.442    11366.0      606.2        10759.943    12249.8      659.6        11590.244    12659.3      860.3        11799.045    16331.0      589.0        15742.046    15739.3      641.5        15097.947    16113.9      796.4        15317.548    20652.9      755.5        19897.449    22318.7      882.4        21436.350    22676.6      1204.3       21472.351    22641.9      838.6        21803.252    23486.9      904.8        22582.053    23103.4      1022.7       22080.754    24463.0      838.6        23624.4______________________________________ 
    
     
                       TABLE 7F______________________________________Mouse Pair - F                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     623.6        38.8         584.92     492.8        87.1         405.73     735.7        258.2        477.54     696.9        220.9        476.05     775.8        1149.0       -373.36     882.4        1064.5       -182.17     817.3        1163.3       -346.08     860.3        1059.8       -199.59     882.4        1178.1       -295.710    838.6        1184.6       -346.011    1346.4       1266.3       80.212    1317.2       1289.2       28.013    1376.1       2092.2       -716.114    1406.3       1947.9       -541.715    1406.3       1856.8       -450.516    1436.8       2000.7       -563.917    2026.4       1926.2       100.218    1949.9       2077.2       -127.319    2226.2       2302.4       -76.220    2226.2       2286.7       -60.521    2226.2       2549.1       -322.822    2352.2       2556.7       -204.523    2711.2       3476.0       -764.824    2572.6       3196.8       -624.225    2664.4       3781.6       -1117.126    2806.3       3762.8       -956.527    3764.4       4024.8       -260.428    3315.4       4294.7       -979.329    4064.6       .            .30    4189.0       .            .31    4577.4       4657.5       -80.132    4849.3       4448.0       401.333    .            4753.6       .34    .            4539.8       .35    5424.9       6438.8       -1013.936    5276.9       5834.5       -557.637    5350.6       6359.7       -1009.238    5651.9       5987.7       -335.8______________________________________ 
    
     
                       TABLE 7G______________________________________Mouse Pair - G                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     539.5        239.1        300.42     589.0        321.6        267.43     606.2        310.4        295.84     659.6        288.7        370.95     659.6        321.6        338.06     755.5        659.6        95.97     696.9        606.2        90.88     735.7        589.0        146.69     796.4        659.6        136.810    904.8        659.6        245.211    796.4        735.7        60.712    998.4        998.4        0.013    1098.1       904.8        193.314    1288.3       1531.2       -242.915    1317.2       1499.3       -182.116    1531.2       1406.3       124.917    1436.8       1596.3       -159.518    1697.5       1912.4       -214.919    1767.2       1838.9       -71.620    1838.9       1949.9       -111.021    1987.9       2309.7       -321.8______________________________________ 
    
     
                       TABLE 7H______________________________________Mouse Pair - H                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     623.6        1499.3       -875.62     696.9        1596.3       -899.43     696.9        2664.4       -1967.54     755.5        1875.4       -1119.95     1124.1       1912.4       -788.46     1124.1       1629.6       -505.57     927.6        2572.6       -1644.98     998.4        2854.7       -1856.39     1047.4       3315.4       -2268.010    1563.5       5060.1       -3496.6______________________________________ 
    
     The foregoing statistics of Example II may be summarized as follows: 
     EXAMPLE II STATISTICAL SUMMARY TABLE 
     
         __________________________________________________________________________  (E-C Tumor Vol.) Slope (Bi)Mouse Pair  mm.sup.3 Per Day                 Standard Error of Slope (SE((Bi))__________________________________________________________________________XI-A   -.248          22.804XI-B   -46.27         14.331XI-C   -202.617       34.228XI-D   24.345         13.302XI-E   436.119*       22.083XI-F   -22.894        6.234XI-G   -28.45         4.126XI-H   -205.533       76.213__________________________________________________________________________ -*p &gt; .95 based on tdistribution of data (This entry was removed for the signficance test, the results of which are hereinafter summarized, becaus the entry is clearly aberrant). 
    
     The data in the above Example II Statistical Summary Table is subject to evaluation by a conventional significance test which indicates a strong anti-tumor efficacy for the XI pterin mixture. The mean difference (E-C Tumor Vol.) is -68.80 mm 3  per day. The values of this significance test are t (Student&#39;s t value)=-5.41; d f (degrees of freedom)=204; and p (probability level)&lt;&lt;0.000001. 
     SECOND EMBODIMENT 
     EXAMPLE III 
     In Example III, C3H/Ou mice, and thus of the same strain used in Example II, were handled in the test in the manner previously described relative to Example II. However, five mouse pairs were employed in Example III; that is, the mice were treated in pairs where one mouse of each pair was administered the pterin mixture and the other mouse of the pair was administered the same volume of Mammalian Ringer&#39;s Solution. However, in Example III, the test mice of the experimental group were administered a formulation of 32 micrograms per milliliter xanthopterin, 16 micrograms per milliliter isoxanthopterin and 16 micrograms per milliliter neopterin suspension in Mammalian Ringer&#39;s Solution hereinafter referred to for convenience as the &#34;NX/pterin mixture&#34;. 
     The manner of data analysis was identical to that used with the XI pterin mixture of Example II. This experimental data is shown in the following tables. 
     
                       TABLE 9A______________________________________Mouse Pair - A                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     4989.2       606.2        4383.12     3862.3       589.0        3273.33     5123.5       477.9        4645.64     3862.3       606.2        3256.15     4845.9       659.6        4186.36     6930.8       696.9        6233.97     5722.8       796.4        4926.48     6341.9       796.4        5545.59     6616.4       796.4        5820.010    7338.5       817.3        6521.111    10179.2      838.6        9340.512    14424.5      860.3        13564.213    17098.8      882.4        16216.414    17497.5      1098.1       16399.315    21402.7      796.4        20606.316    21726.7      838.6        20888.117    22191.4      623.6        21567.718    28297.5      1150.4       27147.119    28643.6      1148.5       27495.120    30786.9      1172.9       29614.121    32817.0      1296.5       31520.622    37069.3      1360.6       35708.723    38558.2      1463.4       37094.924    37248.0      1644.1       35603.925    38051.4      1762.9       36288.526    39607.4      1908.3       27699.027    43239.5      1813.8       41425.728    39687.7      1850.5       37837.2______________________________________ 
    
     
                       TABLE 9B______________________________________Mouse Pair - B                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     1078.7       1070.2       8.52     1018.5       1380.9       -362.43     994.4        1165.9       -171.54     877.7        1176.7       -2995     1441.7       1652.6       -210.96     1050.8       1869.7       -818.97     1171.7       2030.9       -859.28     1515.3       2103.8       -588.59     1869.9       2226.2       -356.310    1882.6       3069.8       -1187.211    2331.3       3298.2       -966.912    2415.1       3557.3       -1142.213    2535.4       4266.8       -1731.514    2756         5973         -321715    2756.7       6924.7       -416816    3092.7       8522.8       -5430.117    3379         8759         -5379.918    5278.3       8711.2       -343319    6225.9       9009.9       -2784.120    6340.5       8885         -2544.521    7511.3       8425.5       -914.222    8058.1       8751.9       -693.823    8232.2       8720.6       -488.424    8117.3       7751.8       365.525    8511         11362.3      -2851.326    8486.9       9272.9       -78627    8212.9       10584.2      -2371.328    8815.9       10332        -1516.129    7906.1       13159        -525330    8111.9       12437.5      -4325.631    8956.5       15467.6      -6511.132    8965.0       14752.3      -5787.333    11431.6      14482.6      -3051.034    11088.3      14989.3      -3901.135    12205.5      15510.0      -3304.536    11812.2      15462.8      -3650.637    12983.4      19976.4      -6993.038    13083.6      18174.3      -5090.739    12175.5      19781.7      -7606.140    12939.3      20298.9      -7359.641    13124.9      23423.3      -10298.442    13314.6      21624.1      -8309.543    13993.6      22348.7      -8355.144    13055.8      21663.4      -8607.645    13828.6      24832.2      -11003.646    13308.3      27425.4      -14117.147    16061.2      27162.5      -11101.348    15990.1      29932.2      -13942.149    16520.8      28843.8      -12323.050    17588.3      27662.1      -10073.851    18759.5      28472.6      -9713.152    16343.5      29533.8      -13190.353    17201.8      30152.5      -12950.7______________________________________ 
    
     
                       TABLE 9C______________________________________Mouse Pair - C                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     102.2        143.8        -41.62     97.0         229.9        -132.93     118.9        137.3        -18.44     143.8        150.5        -6.75     164.6        137.3        27.46     150.5        179.6        -29.17     278.3        124.8        153.58     220.9        164.6        56.39     477.9        220.9        257.010    448.9        195.4        253.511    606.2        203.7        402.512    589.0        212.2        376.813    1022.7       288.7        734.014    904.8        248.5        656.315    1150.4       258.2        892.216    1098.1       268.1        830.017    2618.2       239.1        2379.218    1802.8       268.1        1534.719    2664.4       333.1        2331.420    2352.2       381.7        1970.521    4380.3       394.6        3985.822    3591.5       407.7        3183.823    3591.5       463.3        3128.324    4644.4       589.0        4055.425    6370.9       735.7        5635.326    6623.5       966.4        5657.127    7238.6       1099.2       6139.428    9634.6       1302.0       8332.629    9203.2       1269.3       7934.030    9417.3       1317.4       8099.831    10079.2      1438.9       8640.332    11250.1      1489.2       9760.933    10653.9      1512.6       9141.334    9525.5       1752.1       7773.435    10421.5      1685.3       8736.136    10889.8      2582.6       8307.137    16997.8      2748.3       14249.438    12508.3      2885.3       9622.939    14422.5      3074.4       11348.140    18647.0      3171.7       15475.241    17975.1      3375.4       14599.742    24025.3      3426.5       20598.8______________________________________ 
    
     
                       TABLE 9D______________________________________Mouse Pair - D                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     157.5        220.9        -63.42     195.4        407.7        -212.33     143.8        381.7        -237.94     179.6        434.9        -255.35     73.6         838.6        -765.06     118.9        .            .7     124.8        .            .8     143.8        1047.4       -903.69     118.9        838.6        -719.810    143.8        950.8        -807.011    150.5        796.4        -645.812    187.4        998.4        -810.913    .            882.4        .14    .            589.0        .15    299.4        523.6        -224.216    321.6        678.1        -356.517    407.7        775.8        -368.018    321.6        882.4        -560.819    333.1        927.6        -594.620    434.9        1047.4       -612.521    477.9        1022.7       -544.822    477.9        1204.3       -726.423    463.3        1098.1       -634.924    572.2        1663.3       -1091.125    838.6        1376.1       -537.526    623.6        604.9        18.727    755.5        969.5        -214.028    755.5        847.5        -91.929    817.3        1261.8       -444.430    882.4        1004.8       -122.431    1072.6       994.6        78.032    950.8        1170.7       - 219.933    1022.7       1075.2       -52.534    974.4        1004.4       -30.035    1124.1       1340.9       -216.936    1150.4       1643.8       -493.437    1499.3       1950.3       -451.038    1531.2       2082.0       -550.839    1697.5       2072.7       -375.240    1531.2       2369.8       -838.641    1629.6       1808.2       -178.642    1663.3       2101.2       -437.943    1732.1       2197.9       -465.744    1838.9       2655.2       -816.445    1875.4       2636.1       -760.746    2267.7       2985.8       -718.147    1875.4       2840.5       -965.148    1987.9       3005.7       -1017.849    2185.2       2985.8       -800.650    2226.2       3561.4       -1335.251    2618.2       3741.6       -1123.452    2664.4       .            .53    2711.2       .            .54    2854.7       3514.0       -659.355    2758.5       3283.4       -524.956    2711.2       3809.3       -1098.157    2854.7       4153.6       -1298.958    2806.3       4151.9       -1345.659    .            5320.5       .60    .            4880.5       .61    3105.0       5865.7       -2760.862    3003.2       .            .63    3105.0       .            .64    3105.0       .            .65    3648.6       7261.4       -3612.866    3823.2       .            .67    3591.5       .            .68    4003.3       .            .69    .            .            .70    .            9017.4       .71    .            .            .72    4189.0       .            .73    .            9143.0       .74    .            .            .75    .            9680.9       .76    6044.3       .            .77    .            .            .78    .            .            .79    .            11959.7      .80    6709.2       .            .81    .            .            .82    6370.9       12610.3      -6239.383    .            .            .84    .            .            .85    .            .            .86    .            18102.9      .87    .            .            .88    .            .            .89    8580.7       16042.2      -7461.690    .            .            .91    .            .            .92    .            .            .93    9744.5       15373.1      -5628.694    .            .            .95    .            .            .96    11371.9      16453.0      -5081.197    .            .            .98    .            18568.1      .99    .            .            .100   9744.5       16093.6      -6349.1101   .            .            .102   .            .            .103   12121.5      .            .104   .            .            .105   12249.5      18032.9      -5783.4______________________________________ 
    
     
                       TABLE 9E______________________________________Mouse Pair - E                           Total Tumor Total Tumor  Total Tumor  Volume (mm.sup.3) Volume (mm.sup.3)              Volume (mm.sup.3)                           (ExperimentalDay   (Experimental)              (Control)    minus Control)______________________________________1     762.9        1911.2       -1148.32     1142.2       .            .3     1011.0       .            .4     937.3        2696.6       -1759.35     1252.2       2881.3       -1629.16     1485.6       3376.8       -1891.37     1398.6       3419.4       -2020.88     1716.8       3911.6       -2194.69     1509.2       4563.3       -3054.110    1703.8       4497.2       -2793.411    1626.7       5148.4       -3521.812    1616.0       .            .13    1628.7       .            .14    1952.0       .            .15    1981.1       8672.7       -6691.716    2304.1       .            .17    2363.3       .            .18    2439.2       .            .19    2324.2       .            .20    3456.9       13903.9      -10446.921    3459.5       .            .22    3816.6       .            .23    4284.1       16957.0      -12672.924    4809.2       .            .25    5088.2       17191.8      -12103.626    4957.9       .            .27    6899.4       .            .28    6032.8       .            .29    7741.9       .            .30    8091.6       .            .31    7091.0       .            .32    8820.6       21209.1      -12388.533    7972.0       .            .34    10469.1      .            .35    10690.2      .            .36    11292.4      17926.6      -6634.237    .            .            .38    .            .            .39    14226.2      22672.4      -8446.2______________________________________ 
    
     The foregoing statistics of Example III may be summarized as follows: 
     EXAMPLE IIl STATISTICAL SUMMARY TABLE 
     
         __________________________________________________________________________  (E-C Tumor Vol.) Slope (Bi)Mouse Pair  mm.sup.3 Per Day                 Standard Error of Slope (SE((Bi))__________________________________________________________________________NXI-A  1605.185*      70.956NXI-B  -240.865       18.998NXI-C  391.485        26.075NXI-D  -56.799        5.363NXI-E  -284.623       58.212__________________________________________________________________________ -*p &gt; .95 based on tdistribution of data (This entry was removed for the significance test, the results of which are hereinafter summarized, because the entry is clearly aberrant.) 
    
     The data in the above Example III Statistical Summary Table is subject to evaluation by a conventional significance test which indicates a strong anti-tumor efficacy for the NXI pterin mixture. The mean difference (E-C Tumor Vol.) is -47.70 mm 3  per day. The values of this significance test are t (Student&#39;s t values)=-2.86; d f (degrees of freedom)=167; and p (probability level)&lt;&lt;0.005. 
     Analysis of the test data of the preceding Examples I, II and III reveals that the XI pterin mixture and the NXI pterin mixture seem to work better in some in vivo systems than in others. This may be because the active in vivo forms of these pterins are their di-hydro derivatives. It is well known that these reduced forms predominate in biological fluids. It is possible that the rodent strains which responded to the pterin formulations have more active pterin reductase systems that allowed the metabolic conversion of the pterins to their active in vivo forms. 
     Furthermore, it is anticipated that derivatives and analogs of xanthopterin, isoxanthopterin and neopterin will also exhibit similar anti-neoplastic activity. For example, 8-N-xanthopteriduim iodide, a synthetic derivative of xanthopterin, is currently being tested upon C3H/HeN-MTV +mice acquired from the National Institutes of Health of Frederick, Md. This derivative is being tested by adding the test compounds to the water ingested at liberty by the mice. 
     In this regard, the applicant believes to have synthesized an ethylated analog to xanthopterin and is presently ascertaining if the synthesized derivative is an enhanced anti-tumor agent using C3H/HeN-MTV+mice, using the following protocol. 
     Fifteen (15) female C3H/HeN-MTV+mice were purchased from the National Cancer Institute, Bethesda, Md. and induced with Dimethyl Benzanthracene (DMBA) at an early age to produce measurable tumors. After a period of acclimatization of about one (1) week, each mouse in the group began imbibing the test pterins; that is, 8-N Ethyl Xanthopteridium Iodide and a xanthopterin/isoxanthopterin mixture. This was done one (1) week prior to commencing carcinogen administration. The three groups of five mice received one of the following pterin mixtures in their drinking water: C--control (no pterins); XI--xanthopterin/isoxanthopterin (2:1 Molar ratio); and N-ETHYL-xanthopteridium iodide (reaction mixture as described later). Each mouse received 1 mg DMBA in 0.1 mL cottonseed oil intragastrically every two weeks for a total of three doses. Each individual animal was palpated weekly, the presence and site of any breast tumors noted, the greater and lesser diameters of any tumor measured by caliper, and the information recorded on appropriate data sheets. Animals were sacrificed when any breast tumor exceeded 1 cm in diameter, or if the animal was in obvious physical distress. Results to date are very promising for the putative 8-N-ethyl xanthopteridium iodide being tested as hereinafter illustrated in Table 10. 
     
                       TABLE 10______________________________________C3H/HeN-MTV + Mice______________________________________Kruskal-Wallis X.sub.1 : Group Y.sub.1 : Days Tumor FreeDF                   2# Groups             3# Cases              12H                    3.626                p = .1632______________________________________Kruskal-Wallis X.sub.1 : Group Y.sub.1 : Days Tumor FreeGroup;     # Cases:   Σ Rank:                            Mean Rank______________________________________Control    3          19         6.333XI         4          16         4N-Ethyl    5          43         8.6______________________________________Mann-Whitney U X.sub.1 : Group Y.sub.1 : Days Tumor Free      Number:    Σ Rank:                            Mean Rank:______________________________________XI         4          12         3N-         5          33         6.6Ethyl______________________________________U                    2U-prime              18Z                    -1.96                p = .05______________________________________ 
    
     The p-value corresponding to the comparison between the XIpterin and 8-N-ethyl xanthopteridium iodide groups indicates that the derivatization of the xanthopterin significantly increased its anti-tumor efficacy relative to the XIpterin mixture. 
     Therefore, the anti-neoplastic compositions and methods for application thereof of the present invention are capable of therapeutically treating virtually all neoplasms regardless of the form, volume, location and state of development having application to Mammalian creatures with beneficial therapeutic results. 
     Although the invention has been herein shown and described in what is conceived to be the most practical and preferred embodiments, it is recognized that departures may be made therefrom within the scope of the invention which is not to be limited to the illustrative details disclosed.