ArticleAnimals : an open access journal from MDPI2025
L-Glutamine Supplementation Improves the In Vitro Qualitative Parameters of Cryopreserved Qinchuan Bull Sperm.
Article in Animals : an open access journal from MDPI, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Semen cryopreservation is a crucial technology for enhancing reproductive efficiency in livestock production; however, oxidative stress-induced sperm damage during the freeze-thaw process remains a significant challenge. In this study, metabolomics was used to analyze the differences in metabolites in semen from Qinchuan cattle with different freezing tolerance, and to screen out the candidate markers of sperm freezing tolerance. The metabolomics results indicate that a total of 264 differential metabolites were identified, and KEGG pathway annotation revealed that amino acid metabolism (15.07%) were prominently represented, and L-glutamine (L-Gln) showed a particularly high abundance in high freezability group (HFG) compared to the low freezability group (LFG). Further experiments demonstrated that L-glutamine supplementation significantly improved post-thaw sperm motility, plasma membrane integrity, and acrosomal integrity (
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