Acquired hypothalamic obesity treatment
Fact-checked by Acquired hypothalamic obesity (aHO) treatment often requires a different approach from standard obesity treatment.
aHO is a rare type of obesity that can occur after a tumor, injury, or other event damages the hypothalamus, an area of the brain that helps regulate appetite and metabolism, or how the body generates and uses energy. Because this disruption usually cannot be addressed by restricting food intake or increasing physical activity alone, weight gain after hypothalamic injury often does not slow in response to typical weight loss strategies.
Besides weight gain, hypothalamic damage in aHO can lead to changes in sleep, mood, and growth, which may require other types of treatment.
In addition to easing symptoms of aHO, treatment aims to reduce the risk of complications. Often, this involves promoting weight loss and maintaining a lower body weight. Treatment may include a combination of lifestyle changes, medications, and weight loss (bariatric) surgery.
Lifestyle and behavioral approaches
Although lifestyle and behavioral changes alone aren’t typically enough to promote weight loss in aHO, they are important for helping people with aHO maintain good overall health and manage body weight. Possible lifestyle strategies for aHO can include:
- engaging in physical activity
- following a diet plan
- participating in behavioral training to learn coping strategies for excessive hunger
- working with therapists and mental health specialists
Dietitians can help design suitable diet plans for aHO and provide guidance on managing behavioral challenges, including excessive hunger, or hyperphagia.
Hyperphagia isn’t always a symptom of aHO, but it should be considered as part of aHO management when it is present. Behavioral training can help people experiencing hyperphagia manage their eating habits. For children who struggle with these behaviors, specialists may recommend changes to the home environment to limit access to food, such as locking food storage areas.
Hyperphagia can also have emotional and psychological effects, and mental healthcare can help people with aHO cope with these challenges.
Medical treatments
In some cases, doctors may recommend medications for aHO to help promote weight loss and control appetite. These treatments can include:
- Imcivree (setmelanotide): The only medication specifically approved in the U.S. to reduce excess body weight and maintain weight loss long term in people with aHO, ages 4 and older. It targets the MC4R pathway, which helps regulate hunger and energy use and can be disrupted by hypothalamic damage.
- Semaglutide or similar medications: Therapies that are approved for weight loss in other forms of obesity, but some studies suggest they may help promote weight loss in people with aHO.
- Stimulants: Medications that can suppress appetite and promote weight loss and may be used off-label in aHO.
- Metformin and diazoxide: Medications that help regulate insulin production and the body’s sensitivity to insulin, a hormone that helps control blood sugar levels, and may help limit weight gain.
Other therapies are currently being tested in aHO clinical trials, including bivamelagon, an experimental therapy that works similarly to Imcivree. By targeting the MC4R pathway, it is designed to suppress appetite and increase energy use, helping to counteract the metabolic rate reduction that contributes to weight gain in aHO.
During diagnosis, most people with aHO undergo testing for hormone deficiencies, which can cause a variety of symptoms beyond weight gain. Hormone replacement therapy may help treat these symptoms and can be used to replace low levels of:
- growth hormone, which helps promote growth
- sex hormones, which affect sexual development, reproductive health, and sex drive
- cortisol, which regulates the body’s stress response
- thyroid hormones, which regulate body temperature, energy use, heart rate, and other processes
Surgical options
Bariatric surgery may help some people with aHO lose weight, although research in this area remains limited. Types of bariatric surgery that have shown some effectiveness in this population include:
- sleeve gastrectomy, which involves removing a large portion of the stomach to restrict how much food it can hold
- gastric bypass, which involves creating a small stomach pouch and connecting it directly to the intestine so that food bypasses most of the stomach and may trigger feelings of fullness more quickly
In general, these surgeries appear to be less effective in aHO than in common forms of obesity, but they may still lead to meaningful weight loss for some people with aHO.
For people with brain tumors that may damage the hypothalamus, surgical techniques designed to remove the tumor while minimizing damage to the hypothalamus may help reduce the risk of aHO.
Monitoring and follow-up
Throughout aHO therapy, regular check-ups and monitoring are recommended. Close monitoring can help identify early signs of possible complications, including:
- metabolic dysfunction-associated steatotic liver disease, a type of fatty liver disease
- type 2 diabetes
- sleep apnea, a condition in which breathing is disrupted during sleep
- depression, anxiety, or other mental health issues
Early identification of these complications can support appropriate management. Doctors may recommend adjusting treatment strategies in response to changes in health.
People with aHO may also require routine check-ups related to the underlying cause of hypothalamic damage. For example, people with aHO related to brain tumors may have regular brain scans to look for signs of tumor recurrence.
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