Testicular-borne factors affect sperm fertility.

Testicular-borne factors affect sperm fertility.
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DOI:
10.1126/science.abc2732
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发表时间:
2020-06-05
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Oatley JM
Oatley JM
中科院分区:
其他
文献类型:
--
作者:
Lord T;Oatley JM

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男性的生育能力依赖于精子在睾丸生精小管中的发生,以及它们在通过附睾的过程中的成熟。附睾体最近端即起始节段(IS)发育受损的小鼠模型拥有形态正常但不能使卵子受精的精子(1)。据推测,在睾丸中合成的因子被释放到小管腔内(光分泌因子),并影响IS的发育和功能。然而,这些因素的身份仍然难以捉摸。在本期的第1132页,Kiyozumiet等人(2)鉴定和表征了第一个已知的光分泌因子,即生殖细胞分泌的蛋白神经表皮生长因子样2(NELL2)。它们展示了NELL2在推动小鼠IS发育中的关键作用,最终产生了IS分泌的蛋白水解酶,这种酶对于附睾中的精子处理和男性生育是必不可少的。
Male fertility relies on the genesis of sperm in seminiferous tubules of the testis and their maturation during transit through the epididymis. Mouse models with impaired development of the most proximal region of the epididymis, the initial segment (IS), possess sperm that are morphologically normal but incapable of fertilizing an egg (1). It has been postulated that factors synthesized in the testis are released into the lumen of tubules (lumicrine factors) and influence development and function of the IS. However, the identity of such factors has remained elusive. On page 1132 of this issue, Kiyozumiet al.(2) identify and characterize the first known lumicrine factor, the germ cell–secreted protein neural epidermal growth factor–like like 2 (NELL2). They demonstrate a key role for NELL2 in driving development of the IS of mice, culminating in the production of IS-secreted proteases that are indispensable for sperm processing in the epididymis and thus male fertility.
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