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Mannose-binding protein gene polymorphism in systemic lupus erythematosus
E J Davies1, N Snowden, M C Hillarby
1Epidemiology Research Unit, University of Manchester, UK.
Arthritis and Rheumatism
|January 1, 1995
Summary
A specific mannose-binding protein (MBP) allele, unable to activate complement, was found more frequently in systemic lupus erythematosus (SLE) patients, suggesting it is a minor risk factor for developing SLE.
Area of Science:
- Immunogenetics
- Rheumatology
Background:
- Mannose-binding protein (MBP) plays a crucial role in the innate immune system.
- Deficiencies in complement activation by MBP have been linked to autoimmune diseases.
Purpose of the Study:
- To investigate the association between a non-complement activating allele of the mannose-binding protein (MBP) gene and susceptibility to systemic lupus erythematosus (SLE).
Main Methods:
- Allele frequencies of the non-complement activating MBP variant were determined using amplification refractory mutation system-polymerase chain reaction.
- The study included 102 white patients diagnosed with SLE and 136 healthy white controls.
Main Results:
- The non-complement activating MBP allele was identified in 41% of SLE patients compared to 30% of controls (P=0.08, OR=1.6).
- The gene frequency for this allele was 0.25 in SLE patients and 0.19 in controls (P=0.08, OR=1.5).
Conclusions:
- The studied MBP allele appears to be a minor genetic risk factor for the development of systemic lupus erythematosus.
- Further research is warranted to elucidate the precise mechanisms linking this MBP allele to SLE pathogenesis.