PMCH (pro-melanin-concentrating hormone) is a neuropeptide precursor gene located on human chromosome 12-q24 1 that encodes melanin-concentrating hormone (MCH) and additional peptides including NEI and NGE 2. PMCH primarily regulates feeding behavior and energy homeostasis through MCH signaling in the hypothalamus and nucleus accumbens 3. Chr12 loss of PMCH in rats decreases meal size and reduces high-fat food-reinforced responding, indicating MCH acts as an amplifier of motivational aspects of feeding 3. The MCH-MCH1R system in the nucleus accumbens shell positively mediates motivational and incentive-related aspects of food consumption by modulating limbic dopamine signaling 3. PMCH is selectively expressed in activated human Th2 immune cells, potentially linking allergic inflammation to energy homeostasis and contributing to asthma-obesity associations 4. In vertebrate evolution, the three-exon PMCH gene encoding MCH is highly conserved and participates in feeding behaviors, while a teleost-specific variant (PMCHL) may have hormonal functions in color adaptation 5. PMCH has been identified as a differentially methylated gene in preeclampsia, suggesting potential diagnostic relevance 6. These findings position the PMCH-MCH system as a viable therapeutic target for obesity treatment.