PMID- 21752455 OWN - NLM STAT- MEDLINE DCOM- 20120126 LR - 20161125 IS - 1879-3231 (Electronic) IS - 0093-691X (Linking) VI - 76 IP - 6 DP - 2011 Oct 1 TI - Effect of pentoxifylline treatment on testicular perfusion and semen quality in Miniature horse stallions. PG - 1027-35 LID - 10.1016/j.theriogenology.2011.05.005 [doi] AB - The objective was to investigate the effects of pentoxifylline (PTX) on testicular perfusion and sperm production in stallions. In a preliminary study, six mature Miniature horse stallions were given 0, 8.5, or 17.0 mg/kg of PTX orally, twice daily, for 3 d. Total Arterial Blood Flow Rate (TABFR) was higher (P < 0.05) in all treated versus control stallions during and after treatment. Two months later (during the fall and winter), the same stallions received either 0 or 17 mg/kg of PTX orally, twice daily for 60 d. Resistance and pulsatility indices (RI and PI, respectively) decreased in PTX-treated stallions between Treatment 1 and Post-treatment periods. Arterial diameter, as well as Total Arterial Blood Flow (TABF), decreased in controls between Baseline and Treatment 1 (P < 0.05). A similar decrease in arterial diameter was delayed in Group TREATED, but reached significance during Post-treatment (P < 0.05), whereas TABF did not change in this group. Furthermore, TABFR had a transient tendency to increase during Treatment 1 (P < 0.1), whereas it steadily decreased in controls and reached significance in the Post-treatment period (P < 0.05). Both RI and PI were negatively correlated with end diastolic velocity (EDV) in both groups (P < 0.0001). There were positive correlations between RI and peak systolic velocity (PSV) in treated stallions during Treatment 1 (RI: r = 0.53, P = 0.021; PI: r = 0.59, P = 0.007). Also, there were negative correlations between Time Averaged Maximum Velocity (TAMAX) and Doppler indexes in treated stallions during Treatment 2 period (RI: r = -0.49, P = 0.006; PI: r = -0.47, P = 0.008), and during Post-treatment periods (RI: r = -0.40, P = 0.049; PI: r = -042, P = 0.039). Transient hydrocele occurred in all treated stallions (a potential complication of high-dose PTX). Semen end points were not significantly affected by PTX treatment. In conclusion, PTX delayed the seasonal decrease of testicular perfusion in stallions. Sperm quality and quantity were not significantly affected; perhaps they would have been enhanced by prolonged treatment. CI - Copyright (c) 2011 Elsevier Inc. All rights reserved. FAU - Pozor, Malgorzata A AU - Pozor MA AD - Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32610-0136, USA. PozorM@ufl.edu FAU - Muehlhaus, Jennifer AU - Muehlhaus J FAU - King, Alana AU - King A FAU - Macpherson, Margo L AU - Macpherson ML FAU - Troedsson, Mats H AU - Troedsson MH FAU - Bailey, Christopher S AU - Bailey CS LA - eng PT - Journal Article PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20110712 PL - United States TA - Theriogenology JT - Theriogenology JID - 0421510 RN - 0 (Vasodilator Agents) RN - SD6QCT3TSU (Pentoxifylline) SB - IM MH - Animals MH - Horses/*physiology MH - Male MH - Pentoxifylline/*pharmacology MH - Regional Blood Flow/drug effects MH - Semen Analysis MH - Spermatogenesis/*drug effects MH - Testis/*blood supply/diagnostic imaging/*drug effects MH - Ultrasonography MH - Vasodilator Agents/*pharmacology EDAT- 2011/07/15 06:00 MHDA- 2012/01/27 06:00 CRDT- 2011/07/15 06:00 PHST- 2009/11/10 00:00 [received] PHST- 2011/05/09 00:00 [revised] PHST- 2011/05/12 00:00 [accepted] PHST- 2011/07/15 06:00 [entrez] PHST- 2011/07/15 06:00 [pubmed] PHST- 2012/01/27 06:00 [medline] AID - S0093-691X(11)00224-X [pii] AID - 10.1016/j.theriogenology.2011.05.005 [doi] PST - ppublish SO - Theriogenology. 2011 Oct 1;76(6):1027-35. doi: 10.1016/j.theriogenology.2011.05.005. Epub 2011 Jul 12.