Porphyromonas gingivalis gingipains and surface antigens (P. gingivalis gingipains)

Porphyromonas gingivalis gingipains and surface antigens are the primary virulence determinants of the Gram-negative anaerobe Porphyromonas gingivalis, a keystone pathogen in chronic periodontitis. Gingipains are specialized cysteine proteases, specifically arginine-gingipains (RgpA and RgpB) and lysine-gingipain (Kgp), which are essential for bacterial survival, host tissue destruction, and the subversion of the host immune response (UniProt: P45975, P45971). Surface antigens, including fimbriae and lipopolysaccharides (LPS), facilitate bacterial adhesion to host cells and trigger potent inflammatory signaling pathways (PubMed: 26433148). Beyond oral health, these factors are heavily implicated in systemic diseases, most notably Alzheimer's disease, where gingipains have been detected in the brains of patients and are hypothesized to contribute to neurodegeneration through the cleavage of tau and amyloid proteins (Science Advances: eaau3333). Therapeutic development has focused on small-molecule inhibitors like Atuzaginstat (COR388) designed to block gingipain activity and vaccines targeting surface antigens to reduce bacterial colonization (ClinicalTrials.gov: NCT03820388). However, clinical challenges include managing potential hepatotoxicity and ensuring sufficient drug penetration into target tissues such as the central nervous system.

Other names

GingipainsRgpKgpP. gingivalis virulence factorsCysteine proteases of P. gingivalisArginine-specific gingipainLysine-specific gingipain

Small molecule inhibition of lysine-specific and arginine-specific cysteine proteases (gingipains) to prevent bacterial virulence, host tissue invasion, and neuroinflammatory protein cleavage.