12909
Leptin , a key appetite - regulating hormone derived from the white adipose tissue , primarily acts on hypothalamic neurons to activate catabolic pathway and inhibit anabolic pathway , which can result in anorexia and weight reduction .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None