{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T23:55:07Z","timestamp":1785455707323,"version":"3.56.0"},"reference-count":67,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,10,7]],"date-time":"2021-10-07T00:00:00Z","timestamp":1633564800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Cell Dev. Biol."],"abstract":"<jats:p>Ribosome biogenesis is a fundamental activity in cells. Ribosomal dysfunction underlies a category of diseases called ribosomopathies in humans. The symptomatic characteristics of ribosomopathies often include abnormalities in craniofacial skeletons, digestive organs, and hematopoiesis. Consistently, disruptions of ribosome biogenesis in animals are deleterious to embryonic development with hypoplasia of digestive organs and\/or impaired hematopoiesis. In this study, <jats:italic>ltv1<\/jats:italic>, a gene involved in the small ribosomal subunit assembly, was knocked out in zebrafish by clustered regularly interspaced short palindromic repeats (CRISPRs)\/CRISPR associated protein 9 (Cas9) technology. The recessive lethal mutation resulted in disrupted ribosome biogenesis, and <jats:italic>ltv1<\/jats:italic><jats:sup>\u039414\/\u039414<\/jats:sup> embryos displayed hypoplastic craniofacial cartilage, digestive organs, and hematopoiesis. In addition, we showed that the impaired cell proliferation, instead of apoptosis, led to the defects in exocrine pancreas and hematopoietic stem and progenitor cells (HSPCs) in <jats:italic>ltv1<\/jats:italic><jats:sup>\u039414\/\u039414<\/jats:sup> embryos. It was reported that loss of function of genes associated with ribosome biogenesis often caused phenotypes in a P53-dependent manner. In <jats:italic>ltv1<\/jats:italic><jats:sup>\u039414\/\u039414<\/jats:sup> embryos, both P53 protein level and the expression of <jats:italic>p53<\/jats:italic> target genes, \u0394<jats:italic>113p53<\/jats:italic> and <jats:italic>p21<\/jats:italic>, were upregulated. However, knockdown of <jats:italic>p53<\/jats:italic> failed to rescue the phenotypes in <jats:italic>ltv1<\/jats:italic><jats:sup>\u039414\/\u039414<\/jats:sup> larvae. Taken together, our data demonstrate that LTV1 ribosome biogenesis factor (Ltv1) plays an essential role in digestive organs and hematopoiesis development in zebrafish in a P53-independent manner.<\/jats:p>","DOI":"10.3389\/fcell.2021.704730","type":"journal-article","created":{"date-parts":[[2021,10,8]],"date-time":"2021-10-08T11:13:02Z","timestamp":1633691582000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":7,"title":["The Ribosome Biogenesis Factor Ltv1 Is Essential for Digestive Organ Development and Definitive Hematopoiesis in Zebrafish"],"prefix":"10.3389","volume":"9","author":[{"given":"Chong","family":"Zhang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rui","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xirui","family":"Ma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiehui","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinlu","family":"Han","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingfei","family":"Luo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hua","family":"Ruan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Honghui","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2021,10,7]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"3141","DOI":"10.1101\/gad.10.24.3141","article-title":"Insertional mutagenesis in zebrafish identifies two novel genes, pescadillo and dead eye, essential for embryonic development.","volume":"10","author":"Allende","year":"1996","journal-title":"Genes Dev."},{"key":"B2","first-page":"249","article-title":"Visualizing late states of human 40S ribosomal subunit maturation.","volume":"558","author":"Ameismeier","year":"2018","journal-title":"J. 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