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Adipose tissue vascularization: its role in chronic inflammation
1Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA. yej@pbrc.edu
Current Diabetes Reports
|February 18, 2011
Summary
In obesity, impaired adipose tissue vascularization leads to chronic inflammation and insulin resistance. Early inflammation aids energy expenditure, but late-stage dysfunction worsens insulin sensitivity.
Area of Science:
- Obesity research
- Vascular biology
- Inflammation and metabolism
Background:
- Obesity-associated vascular complications, like insulin resistance in skeletal muscle, are linked to endothelial dysfunction.
- Growing evidence suggests vascular dysfunction in adipose tissue precedes systemic insulin resistance in obesity.
- Adipose tissue growth in obesity outpaces capillary supply, leading to microcirculation failure and hypoxia.
Purpose of the Study:
- To explore the role of adipose tissue vascularization in obesity-induced inflammation and insulin resistance.
- To investigate the sequence of events linking adipose tissue hypoxia, inflammation, and metabolic dysfunction.
Main Methods:
- The study reviews current literature on obesity, adipose tissue biology, vascular function, and inflammation.
- It synthesizes findings on microcirculation, hypoxia, and cellular responses within adipose tissue.
Main Results:
- Adipose tissue hypoxia, triggered by insufficient vascularization, initiates a chronic inflammatory response.
- This inflammation has dual effects: early stages promote vasculature remodeling and energy expenditure, while late stages impair adipose tissue function.
- Late-stage adipose tissue dysfunction contributes significantly to systemic insulin resistance.
Conclusions:
- Adipose tissue vascularization is a critical determinant of chronic inflammation in obesity.
- The interplay between vascular health, inflammation, and hypoxia in adipose tissue directly influences systemic insulin sensitivity.
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