instruction:
Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
question:
Abstract: A peptide that is recognized by antibodies to human somatomedin-C/insulin-like growth factor I (Sm-C/IGF-I) has been partially purified from cultured Sertoli cells prepared from sexually immature rats. The mol wt of this peptide is about 25,000, as determined by gel filtration chromatography and immunoblot analysis of samples resolved by polyacrylamide gel electrophoresis. Isoelectric focusing indicated that the isoelectric point of this peptide was near neutrality. However, a smaller peptide of mol wt 8,000 that cross-reacted with antibodies to Sm-C/IGF-I, was released after gel filtration in acetic acid. Similarly, reverse phase HPLC on a C18 column under acidic conditions released a Sm-C/IGF-I immunoreactive peptide of 8,000 mol wt. This smaller species apparently resulted from the dissociation of this peptide from a binding protein. Unlike the larger neutral form, the isoelectric point of the smaller peptide was 9.8. This pI is similar to the GH-dependent Sm-C/IGF-I peptide isolated from rat serum. The small peptide, unlike the larger form, reacted in a parallel manner to human Sm-C/IGF-I in the Sm-C/IGF-I RIA and radioreceptor assays. In addition, the 8,000 mol wt peptide behaved as a progression factor in the BALB/c-3T3 assay and competed with [125I]Sm-C/IGF-I for binding to the type I Sm-C/IGF-I receptor from cultured rat Sertoli cells. In summary, results of this study demonstrate that rat Sertoli cells in culture secrete a peptide that is the rat equivalent of human Sm-C/IGF-I.
Which is the apt title for the abstract? option1: Partial characterization of a somatomedin-like peptide from the medium of cultured rat Sertoli cells. option2: Imaging of medullary thyroid carcinoma and hyperfunctioning adrenal medulla using iodine-131 metaiodobenzylguanidine.
answer:
Partial characterization of a somatomedin-like peptide from the medium of cultured rat Sertoli cells.

question:
Abstract: This report reviews 833 patients who underwent internal mammary artery grafting alone or with vein grafts between 1968 and 1981. Use of the internal mammary artery was indicated in young or middle-aged patients with the following characteristics: a significant lesion of the proximal left anterior descending artery or its diagonal branch alone (70.1%) or combined with diffuse atherosclerosis (19.9%) or a small caliber (3.4%); absent or unsuitable veins for grafting (5.5%); atherosclerosis or an aneurysm of the ascending aorta (0.6%); and failure of previous vein grafts (0.5%). The left anterior descending artery system was grafted by the left internal mammary artery in 53.2%, and the arterial graft was complimented by vein grafts in 2.6%. In 45.2% of the patients, grafts of the left anterior descending artery by the left internal mammary artery were supplemented by vein grafts to the right coronary artery (23.8%), to the circumflex artery (15.2%), or to both (6.2%). The overall operative mortality was 2.2%. It rose to 16.7% with associated cardiac procedures and to 18.5% in patients who were in New York Heart Association Class IV. If these two high-risk categories of patients are excluded, the perioperative death rate in the remaining 750 was only 0.4%. Of the 815 patients who survived the perioperative period (mean 53.1 months follow-up), 63.1% were relieved of angina and 83.4% were in Class I or II of the New York Heart Association, as compared to 27.4% before the operation. At cardiac recatheterization (mean 18.9 months), 87.9% of the internal mammary artery grafts and 63.3% of the vein grafts were patent (p less than 0.05). The cumulative actuarial 10 year survival rate was 88.6% +/- 1.3%.
Which is the apt title for the abstract? option1: Internal mammary artery grafting. Clinical results, patency rates, and long-term survival in 833 patients. option2: An inexpensive wire passer.
answer:
Internal mammary artery grafting. Clinical results, patency rates, and long-term survival in 833 patients.

question:
Abstract: Vagal stimulation induced by sham feeding in 11 healthy subjects was used to examine the possibility that the autonomic nervous system might be involved in the control of human jejunal absorption. Gastric acid secretion was measured from gastric aspirates corrected for recovery, and jejunal absorption was determined using a triple lumen perfusion technique. Sham feeding induced a significant increase in gastric acid secretion from 1.29 to 7.73 mmol/h (p less than 0.02). Jejunal absorption of water decreased significantly from 41.0 to 26.8 ml/30cm/h (p less than 0.02), sodium from 2.60 to 0.74 mmol/30cm/h (p less than 0.05, and chloride from 2.68 to 0.74 mmol/30cm/h (p less than 0.02). During the hour after sham feeding gastric acid secretion and jejunal absorption returned towards basal values. These results suggest that vagal stimulation may have influenced jejunal absorption of salt and water in man and supports the possibility that the autonomic nervous system has a physiological role in the control of intestinal mucosal function.
Which is the apt title for the abstract? option1: Influence of sham feeding on salt and water absorption in the human jejunum. option2: Isoniazid overdose in the Cambodian population of Olmsted County, Minnesota.
answer:
Influence of sham feeding on salt and water absorption in the human jejunum.