Sci Rep:成年人睾丸中内源性大麻素系统组分的特征和定位

2019-10-04 AlexYang MedSci原创

大麻的过度使用与精液质量的下降有关,也许是外源性大麻素干扰了男性生殖系统的内源性大麻素系统(ECS)。ECS组分已经在人类精子和啮齿动物的睾丸中有所描述,但是关于ECS在人类睾丸中的情况信息还很少。最近你,有研究人员通过对来子15名患者的睾丸组织的免疫组化分析(IHC)鉴定了ECS的主要组成,并对睾丸细胞群体的已经存在的转录组数据进行了生信分析。研究人员通过基质辅助激光解吸电离成像分析确定了2-花

大麻的过度使用与精液质量的下降有关,也许是外源性大麻素干扰了男性生殖系统的内源性大麻素系统(ECS)。ECS组分已经在人类精子和啮齿动物的睾丸中有所描述,但是关于ECS在人类睾丸中的情况信息还很少。

最近你,有研究人员通过对来子15名患者的睾丸组织的免疫组化分析(IHC)鉴定了ECS的主要组成,并对睾丸细胞群体的已经存在的转录组数据进行了生信分析。研究人员通过基质辅助激光解吸电离成像分析确定了2-花生四烯醇甘油(2-AG)的存在。在生殖细胞和体细胞中分别检测到了类内酰胺酶;二酰基甘油脂肪酶(DAGL)和N-酰基-磷脂酰乙醇胺特异性磷脂酶D(NAPE-PLD)。在减数分裂后的生殖细胞、间质细胞和管周细胞中检测到了低水平的大麻素受体CNR1和CNR2的存在。不同转录本编码的不同受体(CB1、CB1A、CB1B和CB2A)异型分布也不同,且主要在生殖细胞中。大麻素代谢酶和α/β水解酶结构域蛋白2(Abhd 2)大量存在在所有的生殖细胞类型中,但早期精母细胞、Sertoli细胞中的单酰甘油脂肪酶(MGLL),晚期精母细胞和减数分裂后生殖细胞中的脂肪酸酰胺水解酶(FAAH)并非大量存在。

最后,研究人员指出,他们的发现与ECS直接调控人类睾丸生理抑制,包括了精子发生与间质细胞功能。他们的研究也为娱乐性大麻可能对人体睾丸功能产生有害影响提供了新的证据支持。

原始出处:

John E. Nielsen, Antoine D. Rolland, Ewa Rajpert-De Meyts et al. Characterisation and localisation of the endocannabinoid system components in the adult human testis. Sci Rep. 19 Sep 2019

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    2019-10-06 kcb069
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    2019-10-06 zhangph

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