The LINC complex transmits integrin-dependent tension to the nuclear lamina and represses epidermal differentiation

eLife

Emma Carley¹  Rachel M Stewart¹  Iman Jalilian¹  Megan C King²  Amanda Zubek³  Abigail Zieman⁴  Samantha Lin⁴  Valerie Horsley⁵  Diane E King⁶ 

[1] Department of Cell Biology, Yale School of Medicine, New Haven, United States;Department of Cell Biology, Yale School of Medicine, New Haven, United States;Department of Molecular, Cell and Developmental Biology, Yale University, New Haven, United States;Department of Dermatology, Yale School of Medicine, New Haven, United States;Department of Molecular, Cell and Developmental Biology, Yale University, New Haven, United States;Department of Molecular, Cell and Developmental Biology, Yale University, New Haven, United States;Department of Dermatology, Yale School of Medicine, New Haven, United States;Sunnycrest Bioinformatics, Flemington, United States;

关键词: epidermis;    stem cell;    differentiation;    mechanotransduction;    nuclear lamina;    LINC complex;    Mouse;   

DOI  :  10.7554/eLife.58541

来源: eLife Sciences Publications, Ltd

【 摘 要 】

While the mechanisms by which chemical signals control cell fate have been well studied, the impact of mechanical inputs on cell fate decisions is not well understood. Here, using the well-defined system of keratinocyte differentiation in the skin, we examine whether and how direct force transmission to the nucleus regulates epidermal cell fate. Using a molecular biosensor, we find that tension on the nucleus through linker of nucleoskeleton and cytoskeleton (LINC) complexes requires integrin engagement in undifferentiated epidermal stem cells and is released during differentiation concomitant with decreased tension on A-type lamins. LINC complex ablation in mice reveals that LINC complexes are required to repress epidermal differentiation in vivo and in vitro and influence accessibility of epidermal differentiation genes, suggesting that force transduction from engaged integrins to the nucleus plays a role in maintaining keratinocyte progenitors. This work reveals a direct mechanotransduction pathway capable of relaying adhesion-specific signals to regulate cell fate.

【 授权许可】

CC BY