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纤毛在毛细胞发育、存活和再生中的作用。

The role of cilia in the development, survival, and regeneration of hair cells.

机构信息

Neuroscience Program, Lafayette College, Easton, PA 18042, USA.

Biology Department, Lafayette College, Easton, PA 18042, USA.

出版信息

Biol Open. 2024 Sep 15;13(9). doi: 10.1242/bio.061690. Epub 2024 Sep 12.

DOI:10.1242/bio.061690
PMID:39263863
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11413933/
Abstract

Mutations impacting cilia genes lead to a class of human diseases known as ciliopathies. This is due to the role of cilia in the development, survival, and regeneration of many cell types. We investigated the extent to which disrupting cilia impacted these processes in lateral line hair cells of zebrafish. We found that mutations in two intraflagellar transport (IFT) genes, ift88 and dync2h1, which lead to the loss of kinocilia, caused increased hair cell apoptosis. IFT gene mutants also have a decreased mitochondrial membrane potential, and blocking the mitochondrial uniporter causes a loss of hair cells in wild-type zebrafish but not mutants, suggesting mitochondria dysfunction may contribute to the apoptosis seen in these mutants. These mutants also showed decreased proliferation during hair cell regeneration but did not show consistent changes in support cell number or proliferation during hair cell development. These results show that the loss of hair cells seen following disruption of cilia through either mutations in anterograde or retrograde IFT genes appears to be due to impacts on hair cell survival but not necessarily development in the zebrafish lateral line.

摘要

影响纤毛基因的突变会导致一类被称为纤毛病的人类疾病。这是由于纤毛在许多细胞类型的发育、存活和再生中的作用。我们研究了破坏纤毛对斑马鱼侧线毛细胞这些过程的影响程度。我们发现,导致纤毛丧失的两个内鞭毛运输(IFT)基因 ift88 和 dync2h1 的突变导致毛细胞凋亡增加。IFT 基因突变体还具有降低的线粒体膜电位,并且阻断线粒体单向转运蛋白会导致野生型斑马鱼的毛细胞丧失,但突变体不会,这表明线粒体功能障碍可能导致这些突变体中观察到的细胞凋亡。这些突变体在毛细胞再生过程中也显示出增殖减少,但在毛细胞发育过程中支持细胞数量或增殖没有一致的变化。这些结果表明,通过正向或逆向 IFT 基因突变破坏纤毛后观察到的毛细胞丧失似乎是由于对毛细胞存活的影响,而不一定是斑马鱼侧线的发育。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/e15e02df9041/biolopen-13-061690-g8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/d698b91606d9/biolopen-13-061690-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/77adbac2e4b1/biolopen-13-061690-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/2a982f726fd7/biolopen-13-061690-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/60d4b9c8815a/biolopen-13-061690-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/ea9e3ab67d2d/biolopen-13-061690-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/1f6bffb92728/biolopen-13-061690-g6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/bf80235f2fd7/biolopen-13-061690-g7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/e15e02df9041/biolopen-13-061690-g8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/d698b91606d9/biolopen-13-061690-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/77adbac2e4b1/biolopen-13-061690-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/2a982f726fd7/biolopen-13-061690-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/60d4b9c8815a/biolopen-13-061690-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/ea9e3ab67d2d/biolopen-13-061690-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/1f6bffb92728/biolopen-13-061690-g6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/bf80235f2fd7/biolopen-13-061690-g7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df2a/11413933/e15e02df9041/biolopen-13-061690-g8.jpg

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