Atomic force microscopy characterization of white and beige adipocyte differentiation

Area of Science:

• Biophysics
• Cell Biology
• Metabolic Science

Background:

• Adipose tissue, primarily white adipose tissue (WAT), regulates energy homeostasis.
• Brown and beige adipose tissue (BAT) possess thermogenic properties.
• Converting white adipocytes to beige adipocytes offers therapeutic potential for metabolic enhancement, but conversion mechanisms are not fully understood.

Purpose of the Study:

• To characterize the morphological, mechanical, and adhesive properties of white and beige adipocytes during differentiation using atomic force microscopy (AFM).
• To identify differences in mechanical properties between white and beige adipocytes that could inform therapeutic strategies.

Main Methods:

• Application of atomic force microscopy (AFM) to assess morphology, roughness, adhesion, and elasticity of adipocytes at various differentiation time points.
• Comparative analysis of mechanical properties during the differentiation of white and beige adipocytes.

Main Results:

• Adipocytes showed morphological changes, becoming rounded during differentiation and lipid loading.
• Both white and beige adipocytes initially decreased in elasticity, with white adipocytes consistently exhibiting higher elasticity.
• Adhesion energy decreased in both cell types compared to preadipocytes, but white adipocytes showed a significant increase by day 12.

Conclusions:

• Significant differences in mechanical properties exist between white and beige adipocytes during differentiation.
• These findings enhance understanding of adipocyte differentiation, crucial for therapeutic induction and maintenance of beige adipocytes for metabolic improvement.