Research progress of oxidative stress on male infertility
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摘要: 受老龄化、生活方式、环境和工作压力等多重因素影响,男性精液质量逐年下降,不育发病率趋势逐年增加,不育症的发病原因、影响因素已成为全球性生殖医学的研究热点。活性氧自由基对于众多生理反应必不可少,其在产生和维持男性生殖生理过程,如性激素分泌、精子获能和运动、顶体反应等均承担重要角色,不仅是精子功能的重要调节因子,亦可作为许多细胞的第二信使参与细胞外信号调节。有许多外源和内源因素能够导致活性氧的产生超过细胞抗氧化能力,可损伤机体氧化防御系统,引起氧化应激损伤,对信号通路、能量代谢、基因表达和蛋白质结构产生不利影响,从而造成生殖器官和精子功能受损,降低受精潜能以及配子支持正常胚胎发育的能力。并可能通过影响下丘脑-垂体-性腺轴和/或干扰其与其他激素轴的串扰,直接或间接地诱发不育。本文综述了氧化应激的本质和来源,影响雄性生殖系统氧化应激产生的重要外源和内源因素,阐述氧化应激对男性生殖系统的生理作用,从器官、细胞和分子水平分析氧化应激损伤对男性生殖系统的破坏性作用及可能的发生机制。最后提出应对措施,为探索抗氧化治疗在临床的规范化应用,预防和治疗男性生殖系统的氧化应激损伤,进而有助于男性不育的治疗提供参考。Abstract: Due to the influence of many factors, such as aging, lifestyle, environment and working pressure, the semen quality of male has been decreasing, the incidence rate of infertility has been increasing year by year. The causes and influence factors of infertility have become the research focus in global reproductive medicine. Reactive oxygen species is essential for many physiological reactions. Reactive oxygen species plays an important role in the production and maintenance of male reproductive physiological processes, such as sexual hormone secretion, sperm capacitation and motility, acrosome reaction, etc. It is not only an important regulator of sperm function, but also a second messenger of many cells involved in extracellular signal regulation. There are many exogenous and endogenous factors that can lead to the production of reactive oxygen species beyond the antioxidant capacity of cells, damage the body's oxidative defense system, cause oxidative stress damage, and have adverse effects on signal pathway, energy metabolism, gene expression and protein structure, thus causing damage to reproductive organs and sperm functions, reducing the fertilization potential and the ability of gametes to support normal embryonic development. It may directly or indirectly induce infertility by affecting the hypothalamic pituitary gonadal axis and/or interfering other hormone axis. This paper reviews the essence and source of oxidative stress, the important external and internal factors that affect the production of oxidative stress in male reproductive system, expounds the physiological effect of oxidative stress on male reproductive system, and analyzes the destructive effect and possible mechanism of oxidative stress on male reproductive system from organ at cellular and molecular levels. Finally, the countermeasures are put forward to explore the standardized application of antioxidant therapy in clinical, to prevent and treat oxidative stress injury of male reproductive system, and to provide reference for the treatment of male infertility.
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Key words:
- Oxidative stress /
- Reactive oxygen species /
- Infertility /
- Sperm
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