Apoptosis pathways in adipocytes

Apoptosis pathways in adipocytes encompass the complex signaling cascades, including the intrinsic mitochondrial and extrinsic death receptor pathways, that govern the programmed cell death of fat cells (Alkhouri et al., 2010, Adipocyte). In healthy adipose tissue, a balance between adipogenesis and apoptosis maintains tissue homeostasis; however, in obesity, hypertrophic adipocytes often undergo apoptosis due to cellular stressors such as hypoxia, endoplasmic reticulum stress, and chronic inflammation (Cinti et al., 2005, J Lipid Res). This adipocyte death is a critical event that triggers macrophage infiltration and the formation of crown-like structures, which are hallmarks of adipose tissue dysfunction and systemic insulin resistance (Tinahones et al., 2013, J Intern Med). While not a single molecular target, these pathways involve key proteins like Caspases, Bcl-2 family members, and TNF-alpha receptors, which are subjects of therapeutic interest. Drugs such as thiazolidinediones (e.g., Pioglitazone) can modulate these pathways by promoting adipocyte differentiation and survival through PPAR-gamma activation, thereby improving metabolic profiles. Conversely, excessive or dysregulated apoptosis in adipose tissue can lead to lipodystrophy and the ectopic accumulation of lipids in organs like the liver, highlighting the need for precise therapeutic control.

Other names

Adipocyte apoptosisProgrammed cell death in adipose tissueFat cell apoptosis

Modulation of pro-apoptotic and anti-apoptotic signaling molecules within the adipose tissue to regulate cell turnover and inflammatory response (Alkhouri et al., 2010).