Related Experiment Videos
Phagocyte recognition of Neisseria gonorrhoeae
Journal of Clinical & Laboratory Immunology
|December 1, 1982
Abstract:
Human monocytes show an increased ability to bind pilate rather than non-pilate gonococci. Polymorphonuclear leucocytes (PMN) do not discriminate between pilate and non-pilate variants. PMN, however, bind appreciably more gonococci (either pilate or non-pilate) than monocytes. The results help to explain the role of pili on gonococci as virulence factors and in the immune response.
Insights
Human monocytes bind more pilate gonococci, while polymorphonuclear leucocytes (PMN) bind more bacteria overall. These findings highlight pili
Area of Science:
- Immunology
- Microbiology
- Cell Biology
Background:
- Neisseria gonorrhoeae possesses pili, hair-like appendages crucial for bacterial adhesion and host immune evasion.
- Understanding the interaction between gonococci and human immune cells is vital for comprehending host defense mechanisms and pathogenesis.
Purpose of the Study:
- To investigate the differential binding of pilate and non-pilate Neisseria gonorrhoeae strains to human monocytes and polymorphonuclear leucocytes (PMN).
- To elucidate the role of gonococcal pili in modulating the interaction with key innate immune cells.
Main Methods:
- Comparative analysis of gonococcal binding to isolated human monocytes and PMN.
- Utilizing both pilate and non-pilate variants of Neisseria gonorrhoeae in in vitro assays.
Main Results:
- Human monocytes demonstrated a significantly higher affinity for pilate gonococci compared to non-pilate strains.
- Polymorphonuclear leucocytes (PMN) exhibited no preference for pilate versus non-pilate gonococci.
- PMN displayed a greater overall capacity to bind gonococci than monocytes, irrespective of pili presence.
Conclusions:
- Gonococcal pili act as critical virulence factors by enhancing bacterial interaction with monocytes.
- The differential binding patterns suggest distinct roles for monocytes and PMN in the early immune response to Neisseria gonorrhoeae infection.
- Pili contribute to the immune response by influencing the interaction with specific phagocytic cells.