A commentary on "High prevalence of metabolic comorbidities in Asian children with type 1 diabetes and obesity".

Type 1 diabetes mellitus (T1DM) in children and adolescents is no longer a tion seen predominantly in lean patients.Wong [1] demonstrate over weight and obesity are already common among Asian youth with T1DM and are strongly associated with hypertension, dyslipidemia, and other metabolic abnor malities.These findings raise 2 key questions: why does obesity develop in pediatric T1DM, and how should we respond therapeutically?A major contributing factor is the nonphysiologic pattern of insulin replacement.In individuals without diabetes, endogenous insulin is secreted into the portal circulation and acts first on the liver.In contrast, in T1DM, subcutaneous insulin enters the systemic circulation directly, resulting in relatively higher peripheral insulin concentrations.This peripheral hyperinsulinemia promotes lipogenesis and suppresses lipolysis.Moreover, intensified insulin therapy has been consisten tly associated with gradual weight gain [2].As body weight increases, insulin resistance rises, necessitating higher insulin doses.This creates a selfperpetuating cycle: higher insulin exposure promotes adiposity, and greater adiposity further increases insulin requirements.Behavioral and developmental factors also contribute.Children and adolescents with T1DM frequently consume additional carbohydrates to prevent or treat hypo glycemia.Even with continuous glucose monitoring, fear of hypoglycemia often leads to defensive snacking.During puberty, growth hormonemediated physiolo gic insulin resistance further increases insulin requirements.In an environment characterized by reduced physical activity and increased availability of energy dense foods, these factors collectively make weight gain more likely [3].Obesity in T1DM is not merely a consequence of treatment but may also influ ence disease biology.Kueh et al. [4] describe shared molecular pathways between obesity and T1DM, including chronic lowgrade inflammation, lipotoxicity, and altered amino acid metabolism.Adipose tissue releases proinflammatory cyto kines that impair insulin signaling and exacerbate insulin resistance.Some eviden ce suggests that a higher body mass index at diagnosis may be associated with more rapid cell decline, although this remains controversial [5].Thus, obesity may both complicate established T1DM and potentially modify disease progres sion.Lifestyle intervention remains the cornerstone of management.Structured nutrition counseling, caloric moderation, increased dietary fiber intake, and regu lar physical activity are essential components of care.However, lifestyle measures alone are often insufficient in adolescents with high insulin requirements and pro gressive weight gain.In such cases, adjunct pharmacologic therapy should be con sidered.Metformin is the most extensively studied adjunctive agent in youth with T1DM.