A recent study published in New Scientist sheds light on why some people struggle to keep weight off after losing it. Researchers have discovered that changes to the DNA structure within fat cells may play a role in this phenomenon, offering potential insights for future treatments.
The study, led by Laura Catharina Hinte at the Federal Institute of Technology Zurich, analyzed fat tissue from individuals with obesity before and after significant weight loss. They found that these individuals had altered levels of RNA molecules in their fat cells, which persisted even after weight loss. These changes were linked to increased inflammation and disrupted fat storage and burning processes, increasing the risk of future weight gain.
Further experiments with obese mice confirmed these findings, showing that the genetic changes observed in fat cells may drive rebound weight gain. The researchers also identified epigenetic marks on DNA within fat cells that seemed to influence these RNA changes, potentially offering new avenues for treatment.
While the study did not directly assess whether these changes contribute to weight regain in humans, experts believe the findings are likely applicable to humans based on similarities in genetic processes between mice and humans. Henriette Kirchner at the University of Lübeck in Germany suggests that targeting epigenetics with drugs could be a promising approach for treating obesity in the future.
Overall, this research highlights the complex interplay between genetics, epigenetics, and weight regulation, providing valuable insights into why weight maintenance can be challenging for some individuals. Future studies may further explore these mechanisms and develop targeted therapies to help individuals maintain long-term weight loss success.