Slpi
Function
Acid-stable proteinase inhibitor with strong affinities for trypsin, chymotrypsin, elastase, and cathepsin G (PubMed:9126337). Modulates the innate immune response after bacterial infection (PubMed:12615907). Contributes to regulate the inflammatory and immune responses to the intracellular parasite L.major (PubMed:25030421). Down-regulates responses to bacterial lipopolysaccharide (LPS) (PubMed:12615907, PubMed:25030421, PubMed:9039268). Plays a role in regulating the activation of NF-kappa-B and inflammatory responses (PubMed:11017147, PubMed:12615907). Has antimicrobial activity against mycobacteria, but not against salmonella (PubMed:18322212). Contributes to normal resistance against infection by M.tuberculosis (PubMed:18322212). Required for normal resistance to L.major (PubMed:25030421). Required for normal wound healing, probably by preventing tissue damage by limiting protease activity (PubMed:11017147, PubMed:25030421). Together with ELANE, required for normal differentiation and proliferation of bone marrow myeloid cells (By similarity).
Tissue Specificity
Detected in bronchial epithelial cells (PubMed:18322212). Detected in bronchoalveolar fluid after infection with M.tuberculosis (at protein level) (PubMed:18322212). Highest expression in lung, spleen, intestine and epididymis with lower levels in liver and seminal vesicle. No expression in brain, heart, kidney and muscle.
Cellular localization
- Secreted
Alternative names
Antileukoproteinase, ALP, Secretory leukocyte protease inhibitor, Slpi