T-Cadherin Finetunes Proliferation-Differentiation During Adipogenesis via PI3K-AKT Signaling Pathway

Area of Science:

• Cell Biology
• Metabolic Regulation
• Adipose Tissue Biology

Background:

• Adipose tissue renewal involves stem/progenitor cell proliferation and adipocyte differentiation.
• T-cadherin (CDH13) is expressed in adipose tissue and binds high-molecular-weight adiponectin.
• The role of T-cadherin in adipogenesis is not well understood.

Purpose of the Study:

• Investigate the function of T-cadherin in adipocyte differentiation using the 3T3-L1 preadipocyte model.
• Analyze T-cadherin expression dynamics during differentiation.
• Assess the impact of T-cadherin manipulation on adipogenesis and related signaling pathways.

Main Methods:

• Utilized the 3T3-L1 preadipocyte model for adipogenesis studies.
• Performed T-cadherin overexpression and knockdown experiments.
• Analyzed gene expression, lipid accumulation, and key signaling pathways (ERK, PI3K-AKT, AMPK, mTOR).

Main Results:

• T-cadherin overexpression maintained a proliferative, undifferentiated state, delaying differentiation and suppressing lipid accumulation.
• T-cadherin knockdown accelerated adipocyte differentiation and enhanced lipid accumulation.
• Downregulation of T-cadherin increased insulin responsiveness via PI3K-AKT pathway activation.

Conclusions:

• T-cadherin acts as a negative regulator of adipogenesis.
• T-cadherin modulates adipose tissue plasticity by balancing progenitor expansion and differentiation.
• Findings suggest T-cadherin's relevance to obesity and metabolic diseases.