Research progress of YKL-40 related to respiratory diseases

YKL-40 is a newly discovered mammalian chitinase-like protein.Recent studies have shown that YKL-40 is closely relate to the pathogenesis of respiratory diseases.This article reviews the recent development of YKL-40 and its involvement in respiratory diseases. Key words: YKL-40; Chitinase 3 like 1; Respiratory diseases