A Cooperative Network at the Nuclear Envelope Counteracts LINC-mediated Forces During Oogenesis in
Authors
Affiliations
Oogenesis involves transduction of mechanical forces from the cytoskeleton to the nuclear envelope (NE). In , oocyte nuclei lacking the single lamin protein LMN-1 are vulnerable to collapse under forces mediated through LINC (linker of nucleoskeleton and cytoskeleton) complexes. Here, we use cytological analysis and in vivo imaging to investigate the balance of forces that drive this collapse and protect oocyte nuclei. We also use a mechano-node-pore sensing device to directly measure the effect of genetic mutations on oocyte nuclear stiffness. We find that nuclear collapse is not a consequence of apoptosis. It is promoted by dynein, which induces polarization of a LINC complex composed of Sad1 and UNC-84 homology 1 (SUN-1) and ZYGote defective 12 (ZYG-12). Lamins contribute to oocyte nuclear stiffness and cooperate with other inner nuclear membrane proteins to distribute LINC complexes and protect nuclei from collapse. We speculate that a similar network may protect oocyte integrity during extended oocyte arrest in mammals.
Cromer L, Tiscareno-Andrade M, Lefranc S, Chambon A, Hurel A, Brogniez M Nat Commun. 2024; 15(1):5964.
PMID: 39013853 PMC: 11252379. DOI: 10.1038/s41467-024-50169-4.
Mechanochemical coupling of MGF mediates periodontal regeneration.
Zhao Y, Zhang S, Cheng B, Feng F, Zhu Y, Liu Y Bioeng Transl Med. 2024; 9(1):e10603.
PMID: 38193124 PMC: 10771565. DOI: 10.1002/btm2.10603.
Split-GFP lamin as a tool for studying LMN-1 dynamics .
Gregory E, Ragle J, Ward J, Starr D MicroPubl Biol. 2023; 2023.
PMID: 38152058 PMC: 10751582. DOI: 10.17912/micropub.biology.001022.
Pei Z, Deng K, Xu C, Zhang S Reprod Biol Endocrinol. 2023; 21(1):90.
PMID: 37784186 PMC: 10544615. DOI: 10.1186/s12958-023-01143-0.