Neuromedin U
Also known as: NMU, neuromedin U-25, neuromedin U-8
Neuromedin U is a neuropeptide group whose prominent human variant, neuromedin U-25, consists of 25 amino acids, documented in UniProt under accession P48645 with a mass near 3081.37 daltons. A shorter form, U-8, is also cataloged. It is investigated in contexts like appetite regulation, energy balance, blood pressure, and hormone secretion.
Quick Reference
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Overview
Neuromedin U is a neuropeptide found in the brain of humans and other mammals, which has a number of diverse functions including contraction of smooth muscle, regulation of blood pressure, pain perception, appetite, bone growth, and hormone release. It was first isolated from the spinal cord in 1985, and named after its ability to cause smooth muscle contraction in the uterus.
Mechanism of Action
Neuromedin U activates two G protein coupled receptors, NMUR1 and NMUR2. Signaling via GNAQ or GNA11 leads to phospholipase C activation, splitting PIP2 into IP3 and DAG and mobilizing intracellular calcium, while GNAI1 coupling reduces cyclic AMP. In pancreatic beta cells, NMUR1 signaling curbs insulin secretion by decreasing calcium entry and cyclic AMP, while in Th2 type T cells it raises type 2 cytokine production.
Research History
The peptide's name originates from its potent effects on uterine muscle in early laboratory studies, hence the letter U. Research has since focused on its interaction with its two receptors and its roles in neural and gastrointestinal systems.
What Researchers Are Saying
Community Reports - Not Medical Advice
The following is aggregated from public forums, Reddit, and research communities. These are anecdotal reports from researchers only - not verified clinical data and not a recommendation of any kind.
Neuromedin U (also known as NMU, neuromedin U-25) is studied within the metabolic and weight management research community. Neuropeptide that suppresses food intake and activates HPA axis; studied in anorexigenic and stress physiology models.
Last updated October 28, 2026
Research status: active. Neuromedin U appears across metabolic and weight management research forums and academic literature. Researchers note this compound falls in the weight loss category.
Last updated October 28, 2026
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