MRNIP interacts with sex body chromatin to support meiotic progression, spermatogenesis, and male fertility in mice
© 2022 The Authors. The FASEB Journal published by Wiley Periodicals LLC on behalf of Federation of American Societies for Experimental Biology..
Meiosis has a principal role in sexual reproduction to generate haploid gametes in both sexes. During meiosis, the cell nucleus hosts a dynamic environment where some genes are transcriptionally activated, and some are inactivated at the same time. This becomes possible through subnuclear compartmentalization. The sex body, sequestering X and Y chromosomes during male meiosis and creating an environment for the meiotic sex chromosome inactivation (MSCI) is one of the best known and studied subnuclear compartments. Herein, we show that MRNIP forms droplet-like accumulations that fuse together to create a distinct subnuclear compartment that partially overlaps with the sex body chromatin during diplotene. We demonstrate that Mrnip-/- spermatocytes have impaired DNA double-strand break (DSB) repair, they display reduced sex body formation and defective MSCI. We show that Mrnip-/- undergoes critical meiocyte loss at the diplotene stage. Furthermore, we determine that DNA DSBs (induced by SPO11) and synapsis initiation (facilitated by SYCP1) precede Mrnip expression in testes. Altogether, our findings indicate that in addition to an emerging role in DNA DSB repair, MRNIP has an essential function in spermatogenesis during meiosis I by forming drop-like accumulations interacting with the sex body.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:36 |
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| Enthalten in: |
FASEB journal : official publication of the Federation of American Societies for Experimental Biology - 36(2022), 9 vom: 01. Sept., Seite e22479 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Kazi, Samina [VerfasserIn] |
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| Links: |
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| Themen: |
Chromatin |
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| Anmerkungen: |
Date Completed 04.08.2022 Date Revised 16.06.2023 published: Print Citation Status MEDLINE |
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| doi: |
10.1096/fj.202101168RR |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a © 2022 The Authors. The FASEB Journal published by Wiley Periodicals LLC on behalf of Federation of American Societies for Experimental Biology. | ||
| 520 | |a Meiosis has a principal role in sexual reproduction to generate haploid gametes in both sexes. During meiosis, the cell nucleus hosts a dynamic environment where some genes are transcriptionally activated, and some are inactivated at the same time. This becomes possible through subnuclear compartmentalization. The sex body, sequestering X and Y chromosomes during male meiosis and creating an environment for the meiotic sex chromosome inactivation (MSCI) is one of the best known and studied subnuclear compartments. Herein, we show that MRNIP forms droplet-like accumulations that fuse together to create a distinct subnuclear compartment that partially overlaps with the sex body chromatin during diplotene. We demonstrate that Mrnip-/- spermatocytes have impaired DNA double-strand break (DSB) repair, they display reduced sex body formation and defective MSCI. We show that Mrnip-/- undergoes critical meiocyte loss at the diplotene stage. Furthermore, we determine that DNA DSBs (induced by SPO11) and synapsis initiation (facilitated by SYCP1) precede Mrnip expression in testes. Altogether, our findings indicate that in addition to an emerging role in DNA DSB repair, MRNIP has an essential function in spermatogenesis during meiosis I by forming drop-like accumulations interacting with the sex body | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, N.I.H., Extramural | |
| 650 | 4 | |a XY body | |
| 650 | 4 | |a diplotene | |
| 650 | 4 | |a liquid-liquid phase separation | |
| 650 | 4 | |a male infertility | |
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| 700 | 1 | |a Castañeda, Julio M |e verfasserin |4 aut | |
| 700 | 1 | |a Savolainen, Audrey |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Yiding |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Ning |e verfasserin |4 aut | |
| 700 | 1 | |a Qiao, Huanyu |e verfasserin |4 aut | |
| 700 | 1 | |a Ramirez-Solis, Ramiro |e verfasserin |4 aut | |
| 700 | 1 | |a Nozawa, Kaori |e verfasserin |4 aut | |
| 700 | 1 | |a Yu, Zhifeng |e verfasserin |4 aut | |
| 700 | 1 | |a Matzuk, Martin M |e verfasserin |4 aut | |
| 700 | 1 | |a Prunskaite-Hyyryläinen, Renata |e verfasserin |4 aut | |
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