Severe early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency

Severe early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency is a rare genetic condition that causes extreme weight gain beginning very early in life, usually in childhood. The disease is caused by changes (mutations) in the SH2B1 gene, which plays an important role in how the brain controls appetite and how the body responds to insulin. People with this condition feel intensely hungry most of the time (a symptom called hyperphagia), which leads to severe obesity starting in the first few years of life. Because the SH2B1 protein also helps insulin work properly, affected individuals often develop insulin resistance, meaning their body's cells do not respond well to insulin. This can lead to type 2 diabetes, even at a young age. Other features may include behavioral difficulties, learning challenges, and short stature in some cases. The condition is sometimes also referred to as SH2B1 deficiency syndrome or SH2B adaptor protein 1 deficiency. Because the obesity is driven by a biological problem in appetite regulation rather than lifestyle alone, standard diet and exercise programs are often not enough to control weight. Treatment currently focuses on managing symptoms, including careful dietary supervision, behavioral support for eating habits, monitoring and treating insulin resistance or diabetes, and addressing any associated developmental or behavioral concerns. There are no specific FDA-approved therapies targeting SH2B1 deficiency directly, though research into melanocortin pathway-targeted treatments (such as setmelanotide) for genetic obesity syndromes is ongoing and may hold future promise for patients with related conditions.

Bring these to your next appointment

• Q1.Is genetic testing recommended for other family members, since this condition can be inherited?,What dietary plan is best for managing my child's constant hunger and weight?,How often should we monitor blood sugar and insulin levels?,Are there any clinical trials or new medications being studied for SH2B1 deficiency?,Would setmelanotide or other melanocortin pathway drugs be appropriate to consider?,What behavioral or psychological support services do you recommend?,At what point should we consider bariatric surgery, and how effective is it for genetic obesity?

Common questions about Severe early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency

Related conditions

Other rare diseases commonly researched alongside Severe early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency.

• Bardet-Biedl syndrome→