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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

High or Low Body Fat Deposition in the Presence of a Normal Oral Sugar Test is Not Associated With Postthaw Semen Parameters in Stallions

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Novello, Guilherme [1, 2] ; Segabinazzi, Lorenzo G. T. M. [1, 2] ; Lisboa, Fernando P. [2] ; Canuto, Lucas E. [1, 2] ; Freitas-Dell'Aqua, Camilla P. [2] ; Dell'Aqua Jr, Jose A. ; Canisso, Igor F. [1]
Total Authors: 7
[1] Univ Illinois, Coll Vet Med, Dept Vet Clin Med, 1008 W Hazelwood Dr, Urbana, IL 61802 - USA
[2] Sao Paulo State Univ, Sch Vet Med & Anim Sci, Dept Anim Reprod & Vet Radiol, Botucatu - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Equine Veterinary Science; v. 95, DEC 2020.
Web of Science Citations: 0

This study compared the postthaw semen parameters of stallions with high and low body condition score (BCS) and evaluated associations between body morphometric parameters and postthaw semen parameters. Twenty stallions were split into Low BCS (BCS<7, n = 11) and High BCS (BCS >= 7, n = 9) groups, and underwent a complete morphometric analysis (e.g., neck scores and circumference, crest neck height, body weight, and height), and subcutaneous body fat thickness (SFT) at the tail head, withers, shoulders, and retroperitoneal space. A fasted oral sugar test (OST) was conducted on all stallions. One ejaculate from each stallion was frozen with a commercial egg yolk-based extender. Postthaw sperm motility parameters, plasma membrane integrity, mitochondrial membrane potential, hydrogen peroxide and intracellular superoxide production, and lipid peroxidation were analyzed for all stallions. The circumference at 25% and 50% of the neck's length were larger for High-BCS stallions (P < .05). There were no differences between groups for the neck crest height (P > .05). Stallions with High BCS had greater SFT at the tail head than stallions with Low BCS (P < .05); however, there were no differences between groups in the SFT at the shoulders and withers (P > .05). All stallions had resting blood glucose below the cutoff for equine metabolic syndrome. There were no differences between groups for resting glucose concentrations or for a peak at 30 or 60 minutes after initiation of the OST (P > .05). There were no differences in sperm parameters between groups (P > .05). Collectively, the findings of the present study suggest that High BCS or Low BCS in the presence of normal OST do not explain post-thaw semen parameters. (C) 2020 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 15/25638-3 - Biotechnological advances in sperm processing
Grantee:José Antonio Dell'Aqua Junior
Support Opportunities: Regular Research Grants