Patent Application: US-201514924712-A

Abstract:
methods of increasing the plasma concentration of resveratrol in a mammal in need thereof by administering to a mammal in need thereof an effective amount of trans - resveratrol and arginine for a period of at least two weeks .

Description:
healthy postmenopausal women ages 50 to 70 years of age were recruited from the greater sacramento area via email and newspaper advertisements . postmenopausal status was defined as the cessation of the menses for at least one year , and a level of follicular stimulating hormone ( hereafter , “ fsh ”) of 23 - 116 . 3 miu / ml . all women were non - smokers , had no history of chronic disease , had no allergies to fruits , and did not regularly use any medications except thyroid medications . use of dietary supplements other than standard multivitamin / mineral formulas ( supplying up to 100 % daily value ) was an exclusion factor . eligibility was determined by completion of a telephone interview , followed by a clinical screening visit conducted at the uc davis ragle human nutrition research center , which included a peripheral arterial tonometry ( hereafter , “ pat ”) measurement , comprehensive metabolic and lipid panels , and assessment of platelet function abnormalities as determined by platelet function analyzer - 100 ( pfa - 100 ) closure time readings ( 94 - 193 sec ). for the one hour study , 37 women were enrolled between march and october 2012 , of which 34 finished ( fig7 ). the two hour study was conducted between june and november 2014 , of which 27 women were enrolled and completed the study ( fig7 ). the institutional review board of the university of california , davis approved the study protocol , and all participants provided written informed consent prior to enrollment . participants were randomized by block design to consumed trans - res or resargin ™ in random order . randomization was performed by the study coordinator following a predetermined plan formulated via a web - based random number generator ( www . randomization . com ). both treatments contained 90 mg of trans - res , provided as two solid white , hard - shelled capsules ( fig1 - 5 ). the study included two separate investigations : a one hour study and a two hour study ( fig6 ). baseline anthropometric and biochemical measures collected during test day one are listed in fig8 . during each study visit , which took place after an overnight fast , a baseline measurement of pat and a blood sample were collected , followed by consumption of the assigned treatment . during the one hour study , pat measurements and blood samples were collected thirty and sixty minutes after the capsules were consumed . during the two hour study , a pat measurement and blood sample were taken two hours after the capsules were consumed . all participants completed a three - day food record , which included two weekdays and a weekend day , one week prior to the first test day . for the duration of the study period , the participants were instructed to continue their normal dietary patterns while avoiding the intake of resveratrol - rich foods such as red wine , red grapes , peanuts and berries . food records were analyzed using the food processor sql software ( version 10 . 1 . 0 ). all data are expressed as mean sem , unless otherwise stated . data were initially assessed for normality and outliers , and values not normally distributed , determined by the shapiro - wilk test , were transformed and rechecked for normality . statistical analyses were conducted using univariate anova with a bonferroni post - hoc confidence interval or a paired t - test . two variables were used : treatment ( trans - res and resargin ™) and time ( 0 , 1 and / or 2 hours ). for nonparametric data , changes from baseline and differences between the treatments were analyzed using friedman &# 39 ; s two - way analysis of variance by ranks with the wilcoxon signed - rank post - hoc test and presented as medians ( interquartile range ). p - values of & lt ; 0 . 05 were considered statistically significant . all analyses were performed with ibm spss software ( version 22 . 0 . 0 . 0 ). blood samples were analyzed for a comprehensive metabolic panel , lipid panel , and complete blood count by the uc davis medical center department of pathology . microvascular function was assessed via pat , using the endo - pat2000 ( itamar medical ltd ., caesarea , israel ) [ 33 ]. briefly , prior to the pat measurement , participants were acclimated to the controlled test room conditions by resting in a supine position for 30 minutes . a finger probe was then placed on the middle finger of both hands , and a blood pressure cuff was fitted on the forearm of the experimental arm ( the non - dominant arm ). the measurement was performed in a supine position with both arms supported at heart level . the procedure included five to ten minutes of baseline recording , followed by a five - minute occlusion period during which the blood pressure cuff was inflated approximately 60 mmhg above the individual &# 39 ; s systolic blood pressure . after five minutes , the pressure was released and the resulting reactive hyperemia response recorded for an additional three to five minutes . the system software then automatically calculated three indices of microvascular function . first , the reactive rhi was calculated , which is the ratio of the average of the pulse wave amplitude ( hereafter , “ pwa ”) during a one - minute period following one minute of reactive hyperemia to the average pwa during a 3 . 5 - minute of baseline period . an increase in rhi indicates improvement of microvascular function . second , the frhi was calculated as the natural logarithmic transformation of the rhi ratio , without the baseline correction factor and utilizing only the readings from 90 to 120 seconds following the reactive hyperemia . third , an augmentation index ( hereafter , “ al ”) was calculated as a measure of arterial stiffness , which was considered along as well as normalized to a heart rate of 75 beats per minute ( hereafter , “ ai @ 75 ”). the ai and ai @ 75 are considered as supplementary measures of cardiovascular risk assessment , since an increase in ai represents an increase in cardiovascular risk [ 34 ]. changes ( δ = post − pre ) in microvascular function for rhi and frhi were significantly greater with resargin ™ compared to trans - res ( fig9 ). for rhi , change with resargin ™ for 1 hour study ( 0 . 527 ± 0 . 158 , p = 0 . 035 ) was significantly greater with trans - res ( 0 . 123 ± 0 . 121 , p = 0 . 035 ). as for frhi , change in resargin ™ was also significantly greater than it in trans - res ( 0 . 306 ± 0 . 173 versus - 0 . 108 ± 0 . 161 ; p & gt ; 0 . 05 ). changes ( δ = post − pre ) in microvascular function were not significantly different between both treatments in rhi (− 0 . 108 ± 0 . 161 trans - res versus 0 . 306 ± 0 . 173 resargin ™; p & gt ; 0 . 05 ). similarly , changes in microvascular function were not significantly different between both treatments in frhi ( 0 . 113 ± 0 . 042 trans - res versus 0 . 216 ± 0 . 081 resargin ™; p & gt ; 0 . 05 ) in the two hour study ( fig1 , 12 ). univariate analysis revealed a significant interaction between treatment and time ( p = 0 . 020 ) for rhi . further analysis showed a significant improvement in rhi one hour after intake of resargin ™ ( 2 . 715 ± 0 . 116 , p & lt ; 0 . 0001 ) compared to baseline ( 2 . 119 ± 0 . 085 ) ( fig1 ), which was not observed with trans - res . similarly , a significant treatment and time interaction was seen for frhi at one hour for the resargin ™ group compared to their baseline values ( 0 . 667 ± 0 . 044 ), while no significant differences were noted in the trans - res group . significant improvements in frhi were seen one and two hours post - consumption of resargin ™ ( 1 . 095 ± 0 . 061 , p & lt ; 0 . 0001 and 0 . 882 ± 0 . 065 p = 0 . 020 , respectively ; fig1 ), while no changes were noted for the trans - res group . the difference between one hour and two hour frhi values with resargin ™ showed a strong trend ( p = 0 . 052 ), while the difference did not quite reach significance . no significant changes were noted for ai or ai @ 75 in either group . to assess bioavailability , plasma resveratrol levels were analyzed with a newly developed analytical method , because existing methods for measurement of resveratrol are focused on wine and other botanical sources and do not consider factors in plasma such as albumin . plasma resveratrol concentrations were determined following analytical methods used to assess flavan - 3 - ols in human plasma following intake of a standardized cocoa extract [ 35 ]. briefly , plasma was treated with acidified methanol [ 0 . 5 % ( v / v ) of acetic acid in methanol ; precooled to − 20 ° c .] containing an appropriate recovery standard . the mixture was stored at − 80 c for 12 hours to allow for cryo - assisted protein precipitation , and then centrifuged for 15 min at 16 , 500 × g . the supernatant fraction was transferred and its volume reduced to less than 50 μl by removing the solvents under vacuum with a 7 speedvac concentrator ( thermo electron corporation , milford , mass .). fifty μl of acidified methanol was then added to the concentrated sample extracts , which were flushed with argon and stored at − 80 ° c . until analysis using an agilent high - pressure liquid chromatography ( hereafter , “ hplc ”) 1100 series unit ( agilent technologies , santa clara , calif ., usa ). after thawing , 150 ul of hplc grade water containing an appropriate internal standard was added to the samples . the plasma resveratrol concentrations were not significantly different between resargin ™ and trans - res . after intake of resargin ™, plasma resveratrol concentration significantly changed from baseline (( 0 . 00 ( 0 . 00 , 0 . 00 ) to 30 minutes ( 0 . 83 ( 0 . 21 , 2 . 89 )) and 60 minutes ( 2 . 09 ( 1 . 60 , 3 . 63 ); p & lt ; 0 . 001 ; fig1 ), as well as after trans - res intake intake ( 0 . 00 ( 0 . 00 , 0 . 00 ) at baseline versus 2 . 04 ( 0 . 82 , 2 . 54 ) at 30 minutes versus 2 . 65 ( 1 . 69 , 3 . 44 ) at 60 minutes ; p & lt ; 0 . 001 ; fig1 ). means line graph for the two treatment are shown below in fig1 . a significant positive correlation was noted between plasma resveratrol and rhi ( rs = 0 . 221 ; p = 0 . 034 ) as well as frhi ( rs = 0 . 348 ; p = 0 . 001 ). further analysis showed a significant correlation between plasma resveratrol and rhi and frhi for resargin ™ ( rs = 0 . 435 ; p = 0 . 002 and rs = 0 . 527 ; p & lt ; 0 . 0001 , respectively ) but not between plasma resveratrol and rhi and frhi for trans - res ( rs = 0 . 010 ; p = 0 . 949 and rs = 0 . 165 ; p = 0 . 273 , respectively ). platelet reactivity during clinical screening was assessed by a pfa - 100 ( siemens , deerfield , ill .) [ 36 ], which measures platelet function by simulating arterial hemostasis under blood flow shear stress . during the intervention , platelet function was assessed by a whole blood / optical lumi - aggregometer ( chrono - log model 700 , havertown , pa .) [ 37 , 38 ]. briefly , platelet aggregation was measured via electrical impedence ( or electrical resistance ), whereas lumi - aggregometry was used to examine aggregation together with adenosine triphosphate ( hereafter , “ atp ”) release , which is determined with firefly luciferin - luciferase system . for the impedance technique without atp release , 500 μl , of each , saline and whole blood were added to a plastic cuvette and stirred at 1000 rpm . for the lumi - aggregometry procedure , 450 μl , saline , 450 μl , whole blood and 100 μl , of luciferin - luciferase reagent were added to a plastic cuvette and stirred at 1000 rpm . one of the following agonists was used to stimulate platelets : collagen ( 1 μl and 5 μl ), aa ( 10 μl ) or adp ( 10 μl ). atp release was measured only when platelets were activated with adp . the aggregation was measured over a period of six minutes , following the addition of an agonist . platelet function analysis revealed a significant increase in lag time one - hour post consumption with both treatments when platelets were stimulated with 1 μl collagen ( p = 0 . 008 for trans - res and p = 0 . 004 for resargin ™; fig1 ). a significant decrease in slope was seen one hour after consumption of resargin ™ ( p = 0 . 004 ; fig1 ), but not for the trans - res group . stimulation with 5 μl collagen showed no significant changes in either group . lumi - aggregometry with 10 μl adp revealed a significant decrease in slope one - hour post consumption of both trans - res and resargin ™ ( p = 0 . 008 and p = 0 . 014 , respectively ; fig1 ). significant decreases in maximum aggregation and auc were observed one hour after intake of resargin ™ when platelets were stimulated with 10 μl aa ( p = 0 . 041 and p = 0 . 005 , respectively ; fig1 ), but no changes were noted in the trans - res group . the present study assessed , among other things , the relative bioactivity and bioavailability of a supplemental resargin ™ compared to trans - res , the form commonly used in most dietary supplements . the data supported improvements in microvascular function and platelet function with resargin ™ which were likely correlated with increases in plasma resveratrol levels , while no effects were noted following intake of trans - res . resveratrol is reported to support endothelial nitric oxide synthase ( hereafter , “ enos ”) [ 39 ] and endothelial cell function . endothelial dysfunction is an initial step in atherosclerosis [ 40 ], and is characterized by reduced nitric oxide ( hereafter , “ no ”) bioavailability , an important vasodilator that is directly produced and released by endothelial cells [ 41 , 42 ], which is involved in initiation and progression of atherosclerosis , a multifaceted condition resulting pathologies associated with cvd . treatment of human umbilical vein endothelial cells with a physiological concentration of trans - res ( 1 μm ) up - regulated the expression of enos [ 43 ], although cell culture models may not accurately reflect in vivo expression due to the lack of metabolites in the culture medium . consequently , examining if supplementation with resveratrol can affect microvascular function and indicators of no activity is important . a number of investigations have been explored in a potential value of resveratrol supplementation on vascular function , since vasodilation is highly dependent on no bioavailability . the measurement is primarily conducted by fmd , which assesses no - mediated response in the conduit arteries of the peripheral circulation . however , evidence on this topic is conflicting . supplementation with 600 mg of red grape extract led to a significant peak in fmd response 60 minutes post - consumption when compared to baseline measurements and a placebo [ 44 ]. it should be noted though , that in addition to 0 . 9 mg of trans - res the supplement evaluated in the above study contained an array of grape polyphenols , some in much higher concentrations than resveratrol ( 4 . 32 mg epicatechin , 2 . 72 mg catechin and 2 . 07 mg gallic acid ), which may have contributed to the positive effects on endothelial relaxation . a recent publication that investigated the bioactivity of multiple supplements , including 100 mg of resveratrol , 800 mg each of green , black , and white tea extract , 250 mg of pomegranate extract , 650 mg of quercetin , 500 mg of acetyl - 1 - carnitine , 600 mg of lipoic acid , 900 mg of curcumin , 1 g of sesamin , 1 . 7 g of cinnamon bark extract , and 1 . 0 g fish oil for six months showed no significant change in fmd [ 45 ]. a study testing a supplement containing 100 mg of resveratrol combined with vitamin d3 , quercetin and rice bran phytate and microencapsulated in plant starches and dextrins ( longevinex ; resveratrol partners , llc ) for three months reported improvements in fmd [ 39 ]. because vitamin d , quercetin , and rice bran phytates have positive effects on cardiovascular outcomes on their own [ 39 ], it is difficult to determine if the positive changes were due to resveratrol , synergism with other compounds , or the other compounds independent of the resveratrol . an intervention that examined the effects of a single dose or 30 , 90 , and 270 mg of trans - res one hour after consumption reported an increase in fmd with all three levels [ 17 ]. wong et al . also reported that intake of 75 mg of trans - res led to a significant increase in fmd one hour post - consumption , as well as after daily intake for six weeks [ 24 ]. similarly , a study that supplemented stable coronary artery disease patients with 10 mg of trans - res for three months demonstrated a significant improvement in fmd [ 23 ]. in contrast , a study that assessed microvascular function by pat reported no significant changes in rhi ( pat index ) 90 minutes after consumption of a supplement containing 1 , 1 . 5 or 2 g of trans - res ( data were combined from the three doses ) that was served with a meal . however , a trend towards improvement ( p = 0 . 06 ) was seen in the rhi after four weeks of daily intake compared to the baseline visit [ 46 ]. a recent investigation reported no effect of daily intake of 250 mg of trans - res for eight weeks , but a positive effect in the control group [ 47 ]. interestingly the same study reported that supplementation with trans - res abolished the positive effects of daily exercise on blood lipids [ 47 ]. the exemplary dose of resveratrol used in the present study ( 90 mg ) was previously reported to induce positive effects on endothelial relaxation , measured by fmd , at one hour after intake [ 17 ]. this study has witnessed an improvement in changes of microvascular function ( rhi ), one hour after consumption of resargin ™ but not with trans - res . combined data from the one hour and two hour studies also revealed a significant improvement in the rhi one hour after intake . the change in rhi was not significantly different between the treatments at the two - hour time point , which suggests an acute response within one hour after intake of resargin ™ that appears to diminish by two hours after intake . analysis of frhi data confirms this argument , since the change in frhi was significantly greater with resargin ™ at the one - hour time point , and not at two hours . findings from this study are also in agreement with the previously mentioned investigation [ 46 ] that reported no significant changes in microvascular function measured by pat acutely with unaltered trans - res . in addition to microvascular function , a number of investigations have examined resveratrol bioavailability using a wide range of dosages , and inconsistent findings have been suggested as the reason for conflicting physiological responses [ 21 ]. multiple factors are known to influence resveratrol bioavailability , including the food matrix , dose and physical properties of the molecule , all of which have the potential to alter maximal plasma concentration ( hereafter , “ cmax ”) and the half - life [ 15 , 21 ]. efforts have been made in the past years to increase resveratrol bioavailability by enhancing the absorption rate and / or reducing intracellular metabolism to increase circulating levels of resveratrol [ 21 ]. for example , a recent study reported that intake of a 2 g lozenge containing 46 % ribose , 46 % of a fructose / sucrose mixture , and 8 % trans - res led to a peak plasma concentration 15 minutes after consumption [ 48 ]. evidence from this study showed that cmax was achieved at an accelerated rate compared to previously reported averages at 30 minutes to two hours [ 20 ] for trans - res supplements . two major limitations of this study are the small sample size and the lack of details regarding the plasma analysis methods . a study that supplemented healthy volunteers with a form of trans - res , where 40 g of resveratrol was solubilized in a lipid solution , led to a significantly higher cmax when compared to trans - res alone [ 49 ]. however , it is unknown if a higher cmax is related to clinical efficacy [ 21 ]. a recent report noted that supplementation with various doses of trans - res ( 0 . 073 mg to 5 g ) also led to quick absorption and elevations of plasma resveratrol levels [ 15 ], but independent of clinical outcomes , it is difficult to interpret these results . in another attempt to assess bioavailability , a significant increase in the urinary excretion of resveratrol metabolites was reported four hours , as well as 15 days , after intake of 187 mg of a beverage that contained 280 μg / l of hydroxycinnamic acids , 16 mg / l of anthocyanins , 96 mg / l of flavanols , 83 mg / l of hydroxybenzoic acids , and 5 . 7 mg / l of stilbenes , compared to baseline measurements or the control treatment [ 50 ]. interestingly , this intervention also reported that sex might have an effect on bioavailability , as higher excretion of resveratrol metabolites were noted in women than men [ 50 ]. a previous intervention with postmenopausal women showed an increase in plasma resveratrol concentration after supplementation of 75 mg of trans - res for twelve weeks , although , no significant changes in plasma lipids or inflammatory markers , including c - reactive protein ( hereafter , “ crp ”) and interleukin - 6 ( hereafter , “ il - 6 ”), were noted [ 29 ]. plasma resveratrol concentrations in the study were not significantly different between the two treatments at 30 and 60 minutes after intake . however , plasma resveratrol levels do not take into consideration that resveratrol might be present in various cells ( e . g ., erythrocytes ) or tissues , and thus not measured in plasma [ 15 , 21 ]. additionally , the data showed an upward sloping curve for trans - res and resargin ™ at 30 and 60 minutes , and it is unknown where the cmax would have been achieved for each treatment . it is also unknown if cmax or the area under the curve are the best indicators of bioavailability , and more studies are needed to clarify this issue . a significant positive association is seen between plasma resveratrol and rhi , as well as frhi . this finding is in agreement with the reported improvements in fmd related to an increase in plasma resveratrol concentrations [ 17 ]. further analysis demonstrated that plasma resveratrol levels were not significantly correlated with rhi and frhi following trans - res intake , but were significantly correlated between plasma resveratrol and rhi and frhi following intake of resargin ™. one possible explanation for the improved bioactivity of resagr compared to trans - res would be a synergistic effect between resveratrol and arginine . it is unlikely that arginine alone was responsible for the positive effects , since the resargin ™ supplement provided 80 mg of arginine , a relatively small amount compared to the reported improvements in vascular function with arginine supplementation , including two hours post - consumption of 15 g of l - arginine [ 51 ], and after daily intake of 21 g for three days [ 52 ]. however , the amount of arginine in resargin ™ could have had an effect on the metabolism of resargin ™, preserving resveratrol in a more bioactive form . with respect to platelet function , since platelets are among the first to arrive at the site of endothelial activation [ 53 ]. but the evidence on the effects of resveratrol on platelet function is scarce . moderate intake of red or white wine ( 300 ml / d ) for 15 days resulted in an increase of resveratrol plasma levels , and a significantly higher release of no by stimulated platelets [ 54 ]. daily trans - res supplementation ( 10 mg ) for three months significantly reduced platelet aggregation in stable coronary artery disease patients [ 23 ]. in vitro treatment of platelets with trans - res ( 10 - 1 , 000 μm ) significantly reduced aggregation in a dose dependent fashion , while resveratrol supplementation ( 4 mg / kg / day ) inhibited adp - induced platelet aggregation in vivo in a hypercholesterolemic rat model [ 55 ]. additional evidence from in vitro studies suggests that trans - res can inhibit cyclooxygenase ( hereafter , “ cox ”) activity and thus reduce platelet aggregation [ 56 , 57 ]. cyclooxygenase is an enzyme that converts aa to thromboxane a2 ( hereafter , “ txa2 ”), and when this enzyme is inhibited , a significant reduction in platelet aggregation is noted [ 58 ]. findings from our study are in agreement with the evidence on the effects of resveratrol on platelet function . the results showed that supplementation with resargin ™ resulted in a significant decrease in maximal aggregation and auc when platelets were stimulated with aa . this suggests that supplementation with resargin ™ may have suppressed cox activity . the study has certain limitations . due to equipment or operator failure , the sample size that was originally estimated was not fully achieved , although a sufficient number of measurements were collected to obtain statistical significance . the study population of postmenopausal women , for whom age and postmenopausal status were risk factors for cvd , was unique , and it would be of interest to examine if similar effects would be seen in different at - risk populations such as overweight or obese adults or children , among those with diabetes , or smokers . since only females were studied , findings are limited in making generalizations to men regarding bioavailability and bioactivity . including multiple time points , both short - term and chronically , would better define the kinetics of the vascular response , platelet reactivity and plasma levels we observed . additionally , examination of plasma no bioavailability may provide a better understanding of changes in endothelial function seen with resargin ™. in conclusion , the data reports significant improvements in microvascular function when 90 mg of resveratrol was consumed as resargin ™ but not as trans - res . the changes noted may have been significantly associated with plasma resveratrol levels . lastly , aa induced platelet aggregation was reduced with resargin ™ but not with trans - res . collectively , evidence from this intervention suggests that supplementation with resargin ™ might have greater cardioprotective benefits than trans - res . 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