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Antioxidant and antiapoptotic effects of a Turraea fischeri leaf extract on cryopreserved goat sperm

This study evaluated the efficacy of Turraea fischeri leaf extract for maintaining the viability of cryopreserved goat sperm. Ejaculated semen was collected from 5 mature Baladi bucks (50-60 kg, 2-4 years of age) and those samples with mass motility ≥ 70% and sperm concentration ≥ 2.5 × 109/mL were...

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Main Authors: Hassan, Soha Abdelaliem Hassan (Author) , Khalil, Wael A. (Author) , Hassan, Mahmoud A. E. (Author) , Yousif, Ahmed I. (Author) , Sabry, Omar M. (Author) , Wink, Michael (Author) , Sobeh, Mansour (Author)
Format: Article (Journal)
Language:English
Published: 29 September 2021
In: Animals
Year: 2021, Volume: 11, Issue: 10, Pages: 1-13
ISSN:2076-2615
DOI:10.3390/ani11102840
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/ani11102840
Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/2076-2615/11/10/2840
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Author Notes:Soha A. Hassan, Wael A. Khalil, Mahmoud A.E. Hassan, Ahmed I. Yousif, Omar M. Sabry, Michael Wink and Mansour Sobeh

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520 |a This study evaluated the efficacy of Turraea fischeri leaf extract for maintaining the viability of cryopreserved goat sperm. Ejaculated semen was collected from 5 mature Baladi bucks (50-60 kg, 2-4 years of age) and those samples with mass motility ≥ 70% and sperm concentration ≥ 2.5 × 109/mL were selected, pooled, and divided into 4 aliquots. Each aliquot was diluted in Tris-citric-soybean lecithin extender containing a different concentration of T. fischeri leaf extract (0, 125, 250, or 375 µg/mL). Treated semen samples were cooled to 5 °C, transferred to 0.25-mL French straws, and stored in liquid nitrogen (LN2) at −196 °C. After thawing, membrane integrity was examined by transmission electron microscopy, apoptotic activity by Annexin/propidium iodide staining and flow cytometry, and both enzyme activities and antioxidant capacity by spectroscopic assays. The leaf extract at 375 µg/mL significantly improved semen quality as indicated by enhanced total antioxidant capacity, reduced H2O2 concentration, a greater proportion of structurally intact motile sperm, and concomitant reductions in apoptosis and necrosis. The extract also significantly increased the proportion of sperm with a contiguous plasma membrane and intact acrosome (p < 0.05). Furthermore, LC-MS revealed numerous secondary metabolites in the extract that may contribute to sperm cryopreservation. 
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