Related Experiment Videos
Lymphocyte response to Klebsiella in ankylosing spondylitis
Abstract:
The lymphocyte response of mononuclear cells (MNC) to Klebsiella (Klebs) was studied in ankylosing spondylitis (ASP) and, for comparison, in patients convalescing from Klebs infection and in HLA-B27+ and B27- healthy blood donors. When large doses of various Klebs cell envelope structures were used, MNC from all healthy blood donors were stimulated to produce LIF but not to synthesize significant amounts of DNA. In contrast, MNC from convalescent patients showed LIF synthesis (but no significant proliferation) even when small doses of the Klebs biostructures were used. This heightened LIF response to Klebs was long-standing and could be demonstrated even after serum antibodies had vanished. Very similarly, MNC from ASP patients did not proliferate significantly, but could be activated to produce LIF even with small doses of Klebs. The heightened LIF response to Klebs in ASP appeared to be correlated with the clinical activity and/or duration of the disease. In contrast, there was no correlation between the presence of HLA-B27 in ASP patients or healthy controls and the LIF or proliferative response to Klebs.
Insights
Mononuclear cells (MNC) from ankylosing spondylitis (ASP) patients show a heightened Lymphocyte-Immune Factor (LIF) response to Klebsiella, even with small antigen doses. This response correlates with disease activity, unlike in healthy donors.
Area of Science:
- Immunology
- Microbiology
- Rheumatology
Background:
- Ankylosing spondylitis (ASP) is a chronic inflammatory disease.
- The immune response to Klebsiella (Klebs) is implicated in ASP pathogenesis.
- Lymphocyte-Immune Factor (LIF) production is a key immune response marker.
Purpose of the Study:
- To investigate the lymphocyte response of mononuclear cells (MNC) to Klebsiella in ASP patients.
- To compare this response with convalescent patients and healthy blood donors (HLA-B27+ and B27-).
- To determine if the response correlates with disease activity or HLA-B27 status.
Main Methods:
- Studied lymphocyte proliferation and LIF synthesis by MNC upon stimulation with Klebsiella cell envelope structures.
- Compared responses across ASP patients, convalescent patients, and healthy controls.
- Assessed correlation with clinical disease activity and HLA-B27 status.
Main Results:
- MNC from healthy donors produced LIF but showed no significant DNA synthesis with large Klebsiella doses.
- MNC from convalescent patients and ASP patients produced LIF even with small Klebsiella doses, but showed no significant proliferation.
- The heightened LIF response in ASP correlated with clinical activity/duration, independent of HLA-B27 status.
Conclusions:
- ASP patients exhibit a heightened, long-standing LIF response to Klebsiella, distinct from proliferative responses.
- This heightened immune response is linked to disease activity in ankylosing spondylitis.
- HLA-B27 status does not influence the observed LIF or proliferative response to Klebsiella in this context.