Open AccessLaminin promotes differentiation of rat embryonic stem cells into cardiomyocytes by activating the integrin/FAK/PI3K p85 pathway
Author(s) -
Wang Duo,
Wang Yumei,
Liu Huan,
Tong Chang,
Ying Qilong,
Sachinidis Agapios,
Li Li,
Peng Luying
Publication year - 2019
Publication title -
journal of cellular and molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.44
H-Index - 130
eISSN - 1582-4934
pISSN - 1582-1838
DOI - 10.1111/jcmm.14264
Subject(s) - microbiology and biotechnology , integrin , laminin , embryonic stem cell , pi3k/akt/mtor pathway , focal adhesion , myocyte , cellular differentiation , c2c12 , phosphorylation , stem cell , biology , chemistry , extracellular matrix , signal transduction , cell , myogenesis , biochemistry , gene
The generation of germline competent rat embryonic stem cells (rESCs) allows the study of their lineage commitment. Here, we developed a highly efficient system for rESC‐derived cardiomyocytes, and even the formation of three‐dimensional (3D)‐like cell clusters with cTNT and α‐Actinin. We have validated that laminin can interact with membrane integrin to promote the phosphorylation of both phosphatidylinositol 3‐kinase (PI3K) p85 and the focal adhesion kinase (FAK). In parallel, GATA4 was up‐regulated. Upon inhibiting the integrin, laminin loses the effect on cardiomyocyte differentiation, accompanied with a down‐regulation of phosphorylation level of PI3K p85 and FAK. Meanwhile, the expression of Gata4 was inhibited as well. Taken together, laminin is a crucial component in the differentiation of rESCs into cardiomyocytes through increasing their proliferation via interacting with integrin pathway. These results provide new insights into the pathways mediated by extracellular laminin involved in the fate of rESC‐derived cardiomyocytes.