Aspergillus fumigatus hyphal wall protein (Af-HWP)

The conserved hyphal cell wall protein antigen on Aspergillus fumigatus is a critical structural and functional component of the fungal cell wall, specifically expressed during the hyphal growth phase. These proteins play a vital role in the fungus's ability to adhere to host tissues, form biofilms, and maintain cell wall integrity under environmental stress. Because these antigens are highly conserved and surface-exposed during invasive growth, they serve as primary targets for the host immune system and are focal points for the development of novel diagnostics and immunotherapies. In clinical practice, while traditional antifungals like azoles and echinocandins disrupt the synthesis of the cell wall components associated with these proteins, emerging therapies such as monoclonal antibodies and CAR-T cells are being designed to specifically recognize and neutralize these hyphal-specific antigens. Targeting these proteins is particularly relevant in the treatment of invasive aspergillosis, a life-threatening infection in immunocompromised patients where rapid and specific fungal clearance is essential.

Other names

Conserved hyphal cell wall protein antigenAspergillus fumigatus hyphal antigenHyphal wall protein 1-like proteinAf-Hwp1

Drugs targeting the fungal cell wall or membrane indirectly affect the expression and presentation of hyphal wall proteins; experimental monoclonal antibodies and CAR-T cells are being developed to bind directly to these antigens to induce fungal lysis or opsonization.