Neisseria meningitidis outer membrane vesicle (OMV (for "outer membrane vesicle"))

Neisseria meningitidis outer membrane vesicle is a spherical, non-replicative, nanoscale lipid bilayer structure naturally shed from the outer membrane of the Gram-negative bacterium Neisseria meningitidis[5][1][6][7]. OMVs contain a complex mixture of outer membrane proteins, lipoproteins, phospholipids, lipopolysaccharide (LPS), periplasmic proteins, and sometimes nucleic acids[1][4][6]. They play natural roles in pathogenesis, immune system evasion, intercellular communication, transport of virulence factors, and horizontal gene transfer[1][5][4]. Critically, OMVs from Neisseria meningitidis are used as the active immunogenic component in several licensed vaccines against serogroup B meningococcal disease due to their ability to induce a broad immune response[9][5][6][7]. Safety concerns are primarily related to the innate immunostimulatory properties of LPS, necessitating genetic or chemical modifications to reduce endotoxin activity for vaccine applications[7][9]. OMVs do not constitute a classic molecular "receptor" or "enzyme," but function as complex, multifunctional vesicles important for both bacterial biology and vaccine technology.

Other names

meningococcal outer membrane vesicleOMVN. meningitidis OMVnative OMV (nOMV)detergent-extracted OMV (dOMV)Neisseria meningitidis OMV

Induces innate and adaptive immune responses through presentation of pathogen-associated molecular patterns (PAMPs), including lipopolysaccharide (LPS) and outer membrane proteins. Triggers immune recognition and antibody production when used as a vaccine platform