2018-01-01, Seker, MESUT, ISEN, Hayati C., Cevirme, NİDAL, Aydin, Sinem, Bilici, Ahmet, COBAN, EZGİ, Bulut, HURİ, YASIN, Ayse I., Demir, TARIK, Aliyev, ALTAY, Kocyigit, ABDÜRRAHİM, Turk, Haci M., ŞEKER, MESUT, ÇEVİRME, NİDAL, BULUT, HURI, ÇOBAN, EZGİ, DEMİR, TARıK, ALİYEV, ALTAY, KOÇYİĞİT, ABDÜRRAHİM, TÜRK, HACI MEHMET

Background: The aim of this study was to identify the possible relationship of 5-fluorouracil (5-FU)-related arterial vasoconstriction with urotensin-2 (UT-2), which has a high potential as an endogenic vasoconstrictor. Methods: We assigned the patients to 1 of 3 groups. Patients in group 1 received a bolus of 5-FU, those in group 2 a continuous infusion (CI) of 5-FU, and those in group 3 no 5-FU, which was also a control group. Pre- and post-treatment UT-2 levels and brachial arterial diameters were measured and recorded in all patients. Results: 132 patients were included in the study. Pre-and post-treatment brachial artery diameters were similar in all groups: in group 1 (3.28 +/- 0.52 vs. 3.25 +/- 0.44 mm, p = 0.740), in group 2 (3.57 +/- 0.47 vs. 3.46 +/- 0.45 mm, p = 0.441) and in the control group (3.51 +/- 0.52 vs. 3.25 +/- 0.44 mm, p = 0.818). Pre-and post-treatment UT-2 levels were significantly different in each group: in group 1 (39.5 +/- 30.9 vs. 56.7 +/- 27.1 ng/ml, p = 0.0001), in group 2 (37.7 +/- 33.7 vs. 62.5 +/- 37.7 ng/ml, p = 0.0001) and in the control group (52.9 +/- 40.2 vs. 60.8 +/- 40.7 ng/ml, p = 0.006). Conclusion: Our findings suggest that UT-2 has a high potential as a vasoconstrictor agent in our bodies and its level increases through a bolus or CI 5-FU. Increased UT-2 levels are likely to play a role in 5-FU-related cardiac toxicity pathogenesis. (c) 2018 S. Karger GmbH, Freiburg