Maternal Obesity's Legacy: Mitochondrial Dysfunction Drives Multigenerational MASLD Risk

Metabolic dysfunction-associated steatotic liver disease (MASLD), formerly NAFLD, is a global health crisis characterized by fat accumulation in the liver, often progressing to more severe liver conditions. Maternal obesity is a significant risk factor known to program offspring for increased susceptibility to various metabolic diseases, including MASLD. However, the specific mechanisms linking maternal metabolic state to the multigenerational development of MASLD have remained largely undefined.

The study revealed a consistent pattern of mitochondrial dysfunction across multiple generations stemming from maternal obesity. Offspring from obese mothers exhibited significantly impaired mitochondrial respiration and altered mitochondrial morphology in their livers, even when fed a healthy diet themselves. This dysfunction was characterized by reduced ATP production capacity and increased markers of oxidative stress within the hepatic mitochondria. Mitochondrial dysfunction was identified as a defining characteristic, consistently observed in the F1, F2, and F3 generations, providing a crucial mechanistic link between maternal obesity and the development of MASLD. These mitochondrial changes were observed to precede or accompany the development of hepatic steatosis (fatty liver) and inflammation, suggesting a direct causal role for mitochondrial health in disease progression across generations.