Delay in primordial germ cell migration in adamts9 knockout zebrafish.

Delay in primordial germ cell migration in adamts9 knockout zebrafish.
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DOI:
10.1038/s41598-021-88024-x
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发表时间:
2021-04-20
期刊:
影响因子:
4.6
通讯作者:
Zhu Y
Zhu Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Carver JJ;He Y;Zhu Y

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Adamts9(一种具有血小板反应蛋白1型基序的崩解素和金属蛋白酶,成员9)是少数从秀丽隐杆线虫到人类结构保守的金属蛋白酶之一,在无脊椎动物生殖细胞迁移中是不可或缺的。然而,adamts9在脊椎动物生殖细胞迁移中的作用尚未得到研究。在本研究中,我们发现在斑马鱼中,adamts9的合子表达开始于胚环阶段,在受精后3天达到峰值。在野生型兄弟姐妹中,原始生殖细胞(PGC)的迁移在24小时内完成,而在Adamts9敲除(KO)中,PGC迁移在受精后15和24小时(hpf)被发现延迟。而在Adamts9 KO中,PGC延迟迁移在48hpf时消失。我们的研究表明,Adamts9在无脊椎动物和脊椎动物的生殖细胞迁移中具有保守功能。此外,我们的研究结果还表明,Adamts9对于秀丽隐杆线虫的生殖细胞迁移并不是必需的,这可能是由于Adamts家族成员的扩展和其他金属蛋白酶在脊椎动物中的代偿作用。金属蛋白酶在生殖细胞迁移和性腺形成中的作用和机制有待进一步研究。
Adamts9 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 9) is one of a few metalloproteinases structurally conserved from C. elegans to humans and is indispensable in germ cell migration in invertebrates. However, adamts9′s roles in germ cell migration in vertebrates has not been examined. In the present study, we found zygotic expression of adamts9 started around the germ ring stage and reached peak levels at 3 days post fertilization (dpf) in zebrafish. The migration of primordial germ cells (PGC) was completed within 24 hours (h) in wildtype siblings, while a delay in PGC migration was found at 15 and 24-h post-fertilization (hpf) in the Adamts9 knockout (KO). However, the delayed PGC migration in Adamts9 KO disappeared at 48 hpf. Our study suggests a conserved function of Adamts9 in germ cell migration among invertebrates and vertebrates. In addition, our results also suggest that Adamts9 is not essential for germ cell migration as reported in C. elegans, possibly due to expansion of Adamts family members and compensatory roles from other metalloproteinases in vertebrates. Further studies are required in order to elucidate the functions and mechanisms of metalloproteinases in germ cell migration and gonad formation in vertebrates.
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