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Kawasaki T, Nishimura T, Tani N, Ramos C, Karaulanov E, Shinya M, Saito K, Taylor E, Ketting RF, Ishiguro KI, Tanaka M, Siegfried KR, Sakai N. Meioc-Piwil1 complexes regulate rRNA transcription for differentiation of spermatogonial stem cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2025:2024.11.17.623901. [PMID: 39605693 PMCID: PMC11601514 DOI: 10.1101/2024.11.17.623901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2024]
Abstract
Ribosome biogenesis is vital for sustaining stem cell properties, yet its regulatory mechanisms are obscure. Herein, we show unique properties of zebrafish meioc mutants in which spermatogonial stem cells (SSCs) do not differentiate or upregulate rRNAs. Meioc colocalized with Piwil1 in perinuclear germ granules, but Meioc depletion resulted in Piwil1 accumulation in nucleoli. Nucleolar Piwil1 interacted with 45S pre-rRNA. piwil1 +/- spermatogonia with reduced Piwil1 upregulated rRNAs, and piwil1 +/- ;meioc -/- spermatogonia recovered differentiation later than those in meioc -/- . Further, Piwil1 interacted with Setdb1 and HP1α, and meioc -/- spermatogonia exhibited high levels of H3K9me3 and methylated CpG in the 45S-rDNA region. These results indicate that zebrafish SSCs maintain low levels of rRNA transcription with repressive marks similar to Drosophila piRNA targets of RNA polymerase II, and that Meioc has a unique function on preventing localization of Piwil1 in nucleoli to upregulate rRNA transcripts and to promote SSC differentiation.
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Affiliation(s)
- Toshihiro Kawasaki
- Department of Gene Function and Phenomics, National Institute of Genetics
- Department of Genetics, School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), Mishima 411-8540, Japan
| | - Toshiya Nishimura
- Division of Biological Science, Nagoya University, Nagoya 464-8601, Japan
| | - Naoki Tani
- Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto 860-0811, Japan
| | - Carina Ramos
- Biology Department, University of Massachusetts Boston, Boston, MA 02125
| | | | - Minori Shinya
- Department of Gene Function and Phenomics, National Institute of Genetics
- Department of Genetics, School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), Mishima 411-8540, Japan
| | - Kenji Saito
- Department of Gene Function and Phenomics, National Institute of Genetics
| | - Emily Taylor
- Biology Department, University of Massachusetts Boston, Boston, MA 02125
| | | | - Kei-ichiro Ishiguro
- Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto 860-0811, Japan
| | - Minoru Tanaka
- Division of Biological Science, Nagoya University, Nagoya 464-8601, Japan
| | | | - Noriyoshi Sakai
- Department of Gene Function and Phenomics, National Institute of Genetics
- Department of Genetics, School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), Mishima 411-8540, Japan
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Kukushkina IV, Makhnovskii PA, Nefedova LN, Balakireva EA, Romanova NI, Kuzmin IV, Lavrenov AR, Kim AI. A Study of the Fertility of a Drosophila melanogaster MS Strain with Impaired Transposition Control of the gypsy Mobile Element. Mol Biol 2020. [DOI: 10.1134/s0026893320030097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sohn EJ, Jo YR, Park HT. Downregulation MIWI-piRNA regulates the migration of Schwann cells in peripheral nerve injury. Biochem Biophys Res Commun 2019; 519:605-612. [PMID: 31540693 DOI: 10.1016/j.bbrc.2019.09.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 09/04/2019] [Indexed: 11/26/2022]
Abstract
Although MIWI (PIWI in humans) regulates spermatogenesis and translation machinery, its role in peripheral nerve injury is poorly understood. In this study, we characterized the expression profiles of MIWI after sciatic nerve injury. The results revealed that MIWI was downregulated after sciatic nerve injury. MIWI was colocalized with S100 (a Schwan cell marker), and TOM20 (a mitochondrial marker) on uncut nerves, while some MIWI was also colocalized with myelin protein zero (a myelin marker) on injured nerves. Immunofluorescence revealed that some MIWI was colocalized with SOX10 in the nuclear compartment following nerve injury. MIWI depletion by MIWI siRNA resulted in the reduction of EGR2. To characterize the expression of PIWI interacting RNA (piRNA) during sciatic nerve injury, microarray-based piRNA was conducted. The results revealed that 3447 piRNAs were upregulated, while 4117 piRNAs were downregulated after nerve transection. Interestingly, piR 009614 downregulated the mRNA level of MBP and enhanced the migration of RT-4 Schwann cells. Together, our results suggest that the MIWI-piRNA complex may play a role in Schwann cell responses to nerve injury.
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Affiliation(s)
- Eun Jung Sohn
- Peripheral Neuropathy Research Center, Department of Molecular Neuroscience, College of Medicine, Dong-A University, Dongdaesin-Dong, Seo-Gu, Busan, 602-714, South Korea.
| | - Young Rae Jo
- Peripheral Neuropathy Research Center, Department of Molecular Neuroscience, College of Medicine, Dong-A University, Dongdaesin-Dong, Seo-Gu, Busan, 602-714, South Korea
| | - Hwan Tae Park
- Peripheral Neuropathy Research Center, Department of Molecular Neuroscience, College of Medicine, Dong-A University, Dongdaesin-Dong, Seo-Gu, Busan, 602-714, South Korea
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PIWI family emerging as a decisive factor of cell fate: An overview. Eur J Cell Biol 2017; 96:746-757. [DOI: 10.1016/j.ejcb.2017.09.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 09/20/2017] [Accepted: 09/29/2017] [Indexed: 01/04/2023] Open
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Fefelova EA, Stolyarenko AD, Yakushev EY, Gvozdev VA, Klenov MS. Participation of the piRNA pathway in recruiting a component of RNA polymerase I transcription initiation complex to germline cell nucleoli. Mol Biol 2017. [DOI: 10.1134/s0026893317050089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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