PMID- 31133311 OWN - NLM STAT- MEDLINE DCOM- 20200701 LR - 20220531 IS - 0737-0806 (Print) IS - 0737-0806 (Linking) VI - 77 DP - 2019 Jun TI - Effect of Mare Colostrum in Extenders for Freezing Stallion Semen. PG - 23-27 LID - S0737-0806(18)30774-3 [pii] LID - 10.1016/j.jevs.2019.02.010 [doi] AB - This study aimed to evaluate the addition of mare colostrum in stallion freezing extenders to improve sperm quality. First, colostrum samples were collected from four mares after the foal's birth and their composition was determined. Ejaculates were collected from nine fertile stallions. Sperm samples were pooled, diluted, and cryopreserved into three experimental extender groups: Lactose-based extender supplemented with mare colostrum (20%), lactose-based extender supplemented with egg yolk (20%), and BotuCrio. The quality of the post-thaw semen samples were evaluated assessing sperm motility by means of computer-assisted analysis, viability by SYBR-14 and propidium iodine (PI) stain, acrosome integrity by fluorescein isothiocyanate and peanut agglutinine (FITC-PNA) and PI stain, plasma membrane functionality by hypo-osmotic swelling (HOS) test, and DNA denaturation by acridine orange (AO) test. There were no significant differences in the percentages of total motility, acrosome integrity, and DNA fragmentation among the extenders after thawing. Kinematics parameters showed significantly higher values in BotuCrio than in lactose extenders (P < .05). BotuCrio and lactose colostrum extender yielded significantly better rates for HOS-test, linearity, straightness, and wobble than egg-yolk extender (P < .05). However, in relation to sperm viability, lactose egg yolk extender showed significantly better results in comparison to the others seminal experimental media (P < .05). In conclusion, the incorporation of mare colostrum into cryopreservation media protected the sperm against cold-shock; therefore, it may be a good cryoprotectant agent alternative in extenders for freezing stallion semen. CI - Copyright (c) 2019 Elsevier Inc. All rights reserved. FAU - Alvarez, Cristina AU - Alvarez C AD - Chief Veterinary Officer of the Veterinary Unit, Zaragoza, Spain. Electronic address: calvsan@gmail.com. FAU - Luno, Victoria AU - Luno V AD - Department of Animal Pathology, Faculty of Veterinary Medicine, Instituto Agroalimentario de Aragon IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain. FAU - Gonzalez, Noelia AU - Gonzalez N AD - Department of Animal Pathology, Faculty of Veterinary Medicine, Instituto Agroalimentario de Aragon IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain. FAU - Guerra, Pilar AU - Guerra P AD - Chief Veterinary Officer of the Veterinary Unit, Jerez de la Frontera, Cadiz, Spain. FAU - Gil, Lydia AU - Gil L AD - Department of Animal Pathology, Faculty of Veterinary Medicine, Instituto Agroalimentario de Aragon IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190221 PL - United States TA - J Equine Vet Sci JT - Journal of equine veterinary science JID - 8216840 SB - IM MH - Animals MH - Colostrum/*physiology MH - Female MH - Freezing MH - Horses MH - Male MH - Pregnancy MH - *Semen MH - Semen Preservation/methods/*veterinary MH - Sperm Motility OTO - NOTNLM OT - Cryopreservation OT - Mare colostrum OT - Semen OT - Stallion EDAT- 2019/05/28 06:00 MHDA- 2020/07/02 06:00 CRDT- 2019/05/29 06:00 PHST- 2018/12/07 00:00 [received] PHST- 2019/01/22 00:00 [revised] PHST- 2019/02/13 00:00 [accepted] PHST- 2019/05/29 06:00 [entrez] PHST- 2019/05/28 06:00 [pubmed] PHST- 2020/07/02 06:00 [medline] AID - S0737-0806(18)30774-3 [pii] AID - 10.1016/j.jevs.2019.02.010 [doi] PST - ppublish SO - J Equine Vet Sci. 2019 Jun;77:23-27. doi: 10.1016/j.jevs.2019.02.010. Epub 2019 Feb 21.