SLC25A28 Overexpression Promotes Adipogenesis by Reducing ATGL

Area of Science:

• Mitochondrial biology
• Obesity research
• Adipose tissue metabolism

Background:

• Adipose tissue dysfunction is a hallmark of obesity and type 2 diabetes.
• Adipocyte proliferation and hypertrophy drive adipose tissue expansion.
• Solute carrier family 25 member 28 (SLC25A28) is an inner mitochondrial membrane iron transporter.

Purpose of the Study:

• To validate the role of SLC25A28 in adipose tissue accumulation and obesity.
• To investigate the effects of SLC25A28 overexpression on metabolic parameters in mice.

Main Methods:

• Adenovirus-mediated overexpression of SLC25A28 in C57BL/6J mice.
• High-fat diet (HFD) induction for obesity model.
• Assessment of body weight, adipose tissue morphology, serum lipids, glucose tolerance, and protein expression (lipogenesis, lipolysis, hormones).

Main Results:

• SLC25A28 overexpression accelerated lipid accumulation in white and brown adipose tissue (BAT), increased body weight, and impaired glucose tolerance.
• Reduced adipose triglyceride lipase (ATGL) protein expression and inhibited BAT formation (downregulated UCP-1, PGC-1α).
• Negative correlation between serum fibroblast growth factor 21 (FGF21) and adipose tissue expansion.

Conclusions:

• SLC25A28 overexpression promotes diet-induced obesity.
• Accelerated lipid accumulation is mediated by regulating hormone secretion and inhibiting lipolysis.
• SLC25A28 plays a significant role in adipose tissue expansion and metabolic dysregulation.