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Ctdnep1 and Eps8L2 regulate dorsal actin cables for nuclear positioning during cell migration
Francisco J Calero-Cuenca1, Daniel S Osorio2, Sofia Carvalho-Marques1
1Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina da Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal.
Current Biology : CB
|February 10, 2021
Summary
The Ctdnep1-Eps8L2 interaction regulates dorsal actin cables, crucial for nuclear positioning and cell migration. This finding sheds light on how cells move their nuclei during migration and disease progression.
Area of Science:
- Cell Biology
- Molecular Biology
- Biophysics
Background:
- Cellular nuclei are actively positioned for physiological functions; mispositioning is linked to diseases like cancer.
- During cell migration, nuclei are typically positioned away from the leading edge.
- Nuclear positioning relies on actin retrograde flow, dorsal actin cables, and the LINC complex forming transmembrane actin-associated nuclear (TAN) lines.
Purpose of the Study:
- To investigate the roles of Ctdnep1/Dullard and Eps8L2 in nuclear positioning and cell migration.
- To elucidate the mechanism by which dorsal actin cables are organized for TAN line formation.
Main Methods:
- Investigated the interaction between Ctdnep1 and Eps8L2.
- Assessed the impact of Ctdnep1 and Eps8L2 on nuclear positioning and cell migration.
- Examined the role of Ctdnep1 and Eps8L2 in the formation and organization of dorsal actin cables.
Main Results:
- Ctdnep1 (a nuclear envelope phosphatase) and Eps8L2 (an actin regulator) directly interact.
- This interaction is essential for proper nuclear positioning and cell migration.
- Ctdnep1 and Eps8L2 influence the formation and thickness of dorsal actin cables, impacting TAN line engagement.
Conclusions:
- The Ctdnep1-Eps8L2 interaction is a key regulator of dorsal actin cable organization.
- This regulation is critical for nuclear movement during cell migration.
- The findings provide new insights into the molecular mechanisms governing nuclear positioning in migrating cells.
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