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Published on: April 11, 2017
The Nemp1-Nesprin complex mediates cellular responses to matrix mechanics
Abira Ganguly1, Hannah Zmuda2, Javier Abello3
1Department of Developmental Biology, Washington University, St. Louis, MO 63110.
Softening the ovary rescues oocyte loss in NEMP1 knockout mice. Nuclear Envelope Membrane Protein 1 (NEMP1) regulates YAP mechanotransduction, crucial for fertility.
Area of Science:
- Cell Biology
- Reproductive Biology
- Biophysics
Background:
- Nuclear Envelope Membrane Protein 1 (NEMP1) is vital for metazoan fertility.
- NEMP1 loss causes primordial oocyte death in the mechanically demanding ovarian cortex.
Purpose of the Study:
- To investigate the role of NEMP1 in oocyte survival and fertility.
- To elucidate the mechanism by which NEMP1 mediates cellular response to mechanical stress.
Main Methods:
- Utilized Nemp1 knockout (KO) mice and cell culture models.
- Assessed oocyte viability, fertility, YAP nuclear translocation, and actin organization.
- Investigated NEMP1 complex formation with Nesprin KASH domains.
Main Results:
- Ovary softening rescued oocyte loss and restored fertility in Nemp1 KO mice.
- NEMP1 depletion on stiff substrates caused cell death, rescued by soft substrates.
- NEMP1 regulates YAP nuclear translocation and actin organization, crucial for mechanotransduction.
- NEMP1 forms a complex with Nesprin KASH domains, strengthening the cytoskeleton.
Conclusions:
- NEMP1 is essential for maintaining oocyte viability by regulating YAP-mediated mechanotransduction.
- The Nemp1-Nesprin complex provides a mechanicaliosensitive pathway parallel to the LINC complex.
- Targeting ovarian mechanical properties may offer therapeutic strategies for fertility preservation.
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