Chitinase 1 (Onchocerca volvulus) (Ov-CHT1)

Chitinase 1 (Ov-CHT1) is a critical enzyme secreted by the parasitic nematode Onchocerca volvulus, which is responsible for causing onchocerciasis, or river blindness, in humans (UniProt P29030). As a member of the glycosyl hydrolase family 18, this enzyme is primarily involved in the degradation of chitin, a structural polysaccharide essential for the parasite's life cycle (Wu et al., 1996). Specifically, Ov-CHT1 facilitates the molting process (ecdysis) where third-stage larvae (L3) transition into fourth-stage larvae (L4), and it is also implicated in the development and release of microfilariae from the adult female worm (Adam et al., 1996). Because humans do not synthesize chitin, this enzyme represents a highly selective therapeutic target for the development of new anthelmintic drugs (Gooday, 1996). Inhibitors such as allosamidin have demonstrated the ability to arrest larval development by blocking chitinase activity, suggesting that targeting this enzyme could provide a macrofilaricidal effect or interrupt transmission (Adam et al., 1996). Current drug discovery efforts focus on identifying potent, small-molecule inhibitors that maintain high selectivity over human chitinases like chitotriosidase to minimize potential off-target effects.

Other names

Ov-CHT1Ov-CHI-1Endochitinase 1Onchocerca volvulus chitinaseCHI1_ONCVO

Inhibition of chitinase activity prevents the degradation of chitinous structures, thereby arresting larval molting and microfilarial development (Adam et al., 1996).