Effect of cis-9,trans-11 and trans-10,cis-12 isomers of conjugated linoleic acid on the integrity and functionality of cryopreserved bovine spermatozoa

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• 作者：Marcio Pereira Soares ; Adriano Br ; elli ; Eneiva Carla Carvalho Celeghini ; Rubens Paes de Arruda ; Shirley Andrea Florez Rodriguez
• 关键词：Bulls ; Semen cryopreservation ; Fatty acids ; Conjugated linoleic acid (CLA)
• 刊名：Cryobiology
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：67
• 期：1
• 页码：102-105
• 全文大小：472 K

文摘

Plasma membranes of sperm subjected to low temperatures undergo changes in their structure and permeability. The addition of fatty acids in semen cryopreservation media may influence the sperm motility after thawing, possibly by maintaining the membrane fluidity due to their incorporation in lipid bilayers. In this work, different concentrations of the isomers cis-9,trans-11 and trans-10,cis-12 of conjugated linoleic acid (CLA) were added in the cryopreservation medium of bovine sperm. Four Jersey bulls were used, and the ejaculates were processed as a pool. The Tris-based extender (Dilutris?) was supplemented with 20 % egg yolk (MB). The treatments with CLA (Luta-CLA?), which had oily presentation, were prepared from MB with addition of 1 % sodium lauryl sulfate, and denominated MBL. The concentrations of CLA tested were 50, 100, and 150 ¦ÌM. The motility characteristics of the post-thaw semen were analyzed by computerized analysis system (CASA), and plasma membrane integrity and acrosomal and mitochondrial function assessed by the association of the fluorescent probes propidium iodide, fluorescein isothiocyanate-conjugated Pisum sativum agglutinin (FITC-PSA), JC-1 and Hoechst 33342. No significant differences were observed among treatments, excepting for a decreased mitochondrial potential of cells treated with 150 ¦ÌM CLA. The addition of CLA, at the concentrations used, showed no advantages on the integrity and functionality of bovine sperm submitted to cryopreservation.