Aging Cell:不完全的脯氨酸分解促使精子过早衰老 

2021-01-26 haibei MedSci原创

不孕症被定义为一对夫妇在无保护性行为后一年内无法受孕。据估计,在美国有12-13%的夫妇与不孕症作斗争。

不孕症被定义为一对夫妇在无保护性行为后一年内无法受孕。据估计,在美国有12-13%的夫妇与不孕症作斗争。虽然通常人们强调女性因素在生育中的重要性,并且对其作用进行了广泛的研究,但男性因素在成功受精的过程中也起着同样重要的作用。

男性生育力通常被衡量为精子质量和数量的函数,因为这些因素与怀孕时间和怀孕成功率相关。随着越来越多的夫妇等待生育,年龄成为不孕不育问题的风险因素;父亲年龄的增加,与母亲年龄一样,也与不良配子健康、不良妊娠结局和出生缺陷风险增加有关。

环境压力已经建立了对生殖健康的负面影响,然而,至今为止,我们对于改变细胞代谢及其内源性活性氧物种(ROS)对生育能力的影响仍然不清楚。最近,研究人员在Aging Cell发文表明,失去脯氨酸脱氢酶,参与脯氨酸分解的第一个步骤的酶,是相对良性的。与此相反,参与分解第二步的alh-6的破坏会导致生殖早衰,特别是在男性中。alh-6可以将1-吡咯啉-5-羧酸(P5C)转化为谷氨酸来促进脯氨酸分解。

alh-6突变体雄性的生殖早衰是由异常的ROS平衡引起的,可以通过基因手段限制脯氨酸分解的第一个步骤或通过抗氧化剂的药物治疗来对抗。

综上所述,该研究工作表明,脯氨酸代谢是正常精子功能的一个关键组成部分,可以改变男性生殖系统的衰老速度。

 

原始出处:

Chia‐An Yen et al. Incomplete proline catabolism drives premature sperm aging. Aging Cell (2021). 

 

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    2021-09-27 zhouqu_8
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    2021-11-22 维他命
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    2021-06-09 habb
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    2021-01-26 ms1000001657529247

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