数字农科院2.0

Autophagy Enhances Lipid Droplet Development During Spermiogenesis In Chinese Soft-Shelled Turtle, Pelodiscus Sinensis

文献类型： 外文期刊

作者： Chen, H; Huang, YF; Yang, P; Shi, YH; Ahmed, N; Liu, TF; Bai, XB; Haseeb, A; Chen, QS

作者机构：

关键词： Spermiogenesis; Autophagy; Lipid Droplets; Chinese Soft-Shelled Turtle

期刊名称： THERIOGENOLOGY

ISSN： 0093-691X

年卷期： 2020 年 147 卷

页码：

收录情况： JCR（2021版）

摘要： Spermiogenesis is a highly organized process of the metamorphosis of round spermatids into spermatozoa in the testes. Autophagy is involved in the physiological process of spermiogenesis and its crucial role in germ-plasm clearance conserved across kingdoms. However, the fate of by-products generated through autophagy during spermiogenesis is still largely unknown. In the present study, we showed that the autophagy enhanced lipid droplets (LDs) formation during spermiogenesis in Chinese soft-shelled turtle, Pelodiscus sinensis. TEM and Oil Red O staining results found that the number and size of LDs within spermatid increased considerably during the process of spermiogenesis. RNA-Seq analysis revealed that autophagy was highly activated via the PI3K pathway during spermatogenesis. Inhibiting autophagy with 3-methyladenine (3-MA) significantly decreased testicular triglycerides (TGs) and fatty acid (FAs) content. In comparison with the control group, the number and size of LD within elongating spermatids was reduced significantly in the 3-MA group. Moreover, DGAT1, a diacylglycerol acyltransferase, which normally localize to the endoplasmic reticulum, was found to co-localize with LDs. Taken together, our results showed that FAs released through the autophagic degradation of germ-plasm was replenished LDs of spermatid, increasing LD number and size, during the process of spermiogenesis. These LDs facilitate long-term sperm storage in the epididymis of Chinese soft-shelled turtle. (C) 2019 Elsevier Inc. All rights reserved.

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