Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Differences in the fatty-acid composition of rodent spermatozoa are associated to levels of sperm competition.

DelBarco-Trillo, J, Mateo, R and Roldan, ER (2015) Differences in the fatty-acid composition of rodent spermatozoa are associated to levels of sperm competition. Biology Open, 4 (4). pp. 466-473. ISSN 2046-6390

This is the latest version of this item.

[img]
Preview
Text
delBarcoTrilloetal2015.pdf - Published Version

Download (252kB) | Preview

Abstract

Sperm competition is a prevalent phenomenon that drives the evolution of sperm function. High levels of sperm competition lead to increased metabolism to fuel higher sperm velocities. This enhanced metabolism can result in oxidative damage (including lipid peroxidation) and damage to the membrane. We hypothesized that in those species experiencing high levels of sperm competition there are changes in the fatty-acid composition of the sperm membrane that makes the membrane more resistant to oxidative damage. Given that polyunsaturated fatty acids (PUFAs) are the most prone to lipid peroxidation, we predicted that higher sperm competition leads to a reduction in the proportion of sperm PUFAs. In contrast, we predicted that levels of sperm competition should not affect the proportion of PUFAs in somatic cells. To test these predictions, we quantified the fatty-acid composition of sperm, testis and liver cells in four mouse species (genus Mus) that differ in their levels of sperm competition. Fatty-acid composition in testis and liver cells was not associated to sperm competition levels. However, in sperm cells, as predicted, an increase in sperm competition levels was associated with an increase in the proportion of saturated fatty-acids (the most resistant to lipid peroxidation) and by a concomitant decrease in the proportion of PUFAs. Two particular fatty acids were most responsible for this pattern (arachidonic acid and palmitic acid). Our findings thus indicate that sperm competition has a pervasive influence in the composition of sperm cells that ultimately may have important effects in sperm function.

Item Type: Article
Uncontrolled Keywords: Arachidonic acid; Lipid peroxidation; PUFA; Polyunsaturated fatty acids; Sperm competition; Sperm membrane
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Natural Sciences & Psychology (closed 31 Aug 19)
Publisher: Company of Biologists
Related URLs:
Date Deposited: 22 Oct 2015 14:50
Last Modified: 04 Sep 2021 14:06
DOI or ID number: 10.1242/bio.201411288
URI: https://researchonline.ljmu.ac.uk/id/eprint/1778

Available Versions of this Item

View Item View Item