In this task, you will be given a sentence. You need to reconize the name of the disorder or disease. Disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury. Although there might be several correct answers, you need to write one of them.
Q:  Recent studies in animal models elucidated a central role of alpha - MSH in the regulation of food intake by activation of the brain melanocortin - 4 - receptor ( MC4 - R ; refs 3 - 5 ) and the linkage of human obesity to chromosome 2 in close proximity to the POMC locus , led to the proposal of an association of POMC with human obesity .
A: 
obesity