eLife:与HIV病毒传播有关的蛋白质实际上对生育有好处!

2017-08-10 佚名 medicalxpress

在精液中发现的蛋白质片段,以前只知道它们能增强艾滋病毒感染的能力,也似乎在生殖生物学中扮演着重要的角色。来自格拉德斯通研究所、加州大学旧金山分校(UCSF)和德国乌尔姆大学的一组研究人员发现,这些碎片可以帮助处理受损或不需要的精子。

在精液中发现的蛋白质片段,以前只知道它们能增强艾滋病毒感染的能力,也似乎在生殖生物学中扮演着重要的角色。来自格拉德斯通研究所、加州大学旧金山分校(UCSF)和德国乌尔姆大学的一组研究人员发现,这些碎片可以帮助处理受损或不需要的精子。

最近几年,科学家们惊奇地发现,精液中含有的蛋白质聚集在一起,形成了一种叫做淀粉样蛋白的结构。

“淀粉样原纤维通常只存在于蛋白质错误折叠引起的疾病,如阿尔茨海默氏症和帕金森氏症的疾病,所以自然存在多个淀粉在健康男性的精液完全出乎意料,”华纳c·格林说,医学博士,博士、高级研究员和病毒学与免疫学研究所的主任。“虽然这些精液淀粉可以促进艾滋病病毒和其他性传播病毒的感染,但我们推测它们必须具有不同的自然功能。”

格林和格莱斯顿访问的研究人员纳迪娅罗兰博士以及他们的同事们开始研究这些精液淀粉的自然功能,主要是关注它们是否参与繁殖。具体来说,他们研究了他们对精子活动的潜在影响。

该研究的第一作者Roan解释说:“我们发现,精液中的淀粉会吸收多余的、损坏的和有缺陷的精子,这些精子可以通过进入女性生殖道的免疫细胞来帮助它们的处理。”

他们的研究结果发表在科学期刊eLife上,表明精液中的淀粉可能会迅速清除残留的精子和精子碎片,这可能会引起对外国男性蛋白质的不利的免疫反应。


“此外,这一过程可能形成一种质量控制机制,以确保只有最适的精子到达受精的地点,从而有利于生育,”Roan说,他也是UCSF的泌尿学助理教授。“我们的研究结果支持了人们越来越接受的观点,即淀粉体可能并不总是有害的,也可能是疾病的标志,但相反,它可能在人体中具有重要的功能。”

“我们需要考虑这些发现及其对其他领域的影响,包括艾滋病毒病毒学,”格林说。“例如,阻止这些精液中用于预防性传播疾病的精液增强活性的努力,现在必须考虑这些干预措施对精子质量和对男性抗原的免疫识别的潜在影响。”

现在,研究人员知道精液淀粉在生理上有助于处理不需要的或受损的精子,格莱斯顿的未来研究将会检查控制精液淀粉样蛋白的过程,以及这些过程的中断是否会导致男性不育。
原始出处:
Nadia R Roan,Nathallie Sandi-Monroy,Nargis Kohgadai.et al, Semen amyloids participate in spermatozoa selection and clearance, eLife

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    2018-01-28 clmlylxy
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    2018-07-16 膀胱癌
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    2017-08-10 有备才能无患

    研究人员知道精液淀粉在生理上有助于处理不需要的或受损的精子,格莱斯顿的未来研究将会检查控制精液淀粉样蛋白的过程,以及这些过程的中断是否会导致男性不育。

    0

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