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Ask Nurse Lynn: Leptin and Hyperphagia

Question:

Male, 36 years old, Deletion

It was suggested to me by a doctor (not a PWS specialist) that those with PWS are deficient in the hormone leptin, and that replacing it could be an alternative way of helping with hyperphagia. Have you heard of leptin supplement as a treatment for hyperphagia?

Nurse Lynn’s Response:

For individuals with PWS, one of the biggest challenges is hyperphagia, or constantly feeling hungry and wanting to eat all the time.

Some people wonder if giving leptin—a hormone that normally helps the brain know when you’re full—might help. But in PWS, the problem isn’t that there’s not enough leptin. In fact, many people with PWS have normal or even high levels of leptin.

The issue is that the brain doesn’t respond to leptin the way it should. This happens because the part of the brain called the hypothalamus, which controls hunger and fullness, doesn’t work properly in PWS. This is due to the genetic differences that cause the syndrome.

So, even if there’s plenty of leptin in the body, the brain doesn’t “hear” the signal that says, “you’re full.” That’s why simply giving more leptin doesn’t help with the constant hunger in PWS.

Resources:

https://pubmed.ncbi.nlm.nih.gov/9450849/

 https://pubmed.ncbi.nlm.nih.gov/9497896/

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