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SAA1 alpha/alpha alleles in amyloidosis.
Engin Kelkitli1, Birsen Bilgici, Bülent Tokgöz
1Ondokuz Mayis University School of Medicine, Samsun, Turkey.
Journal of Nephrology
|June 1, 2006
Summary
The SAA1 alpha/alpha genotype is more frequent in patients with AA type amyloidosis, suggesting it is a risk factor in Caucasian populations. Further research is needed for gamma/gamma genotype associations in Japan.
Area of Science:
- Genetics
- Nephrology
- Immunology
Background:
- AA type amyloidosis is a common complication in Turkish nephrology clinics, often linked to chronic inflammatory conditions.
- Familial Mediterranean fever (FMF), rheumatoid arthritis (RA), tuberculosis, and bronchiectasis are associated conditions.
- The specific role of Serum Amyloid A1 (SAA1) genotypes in AA type amyloidosis remains debated.
Purpose of the Study:
- To investigate the association between SAA1 gene polymorphism and AA type amyloidosis.
- To compare SAA1 genotypes in patients with amyloidosis, FMF, and healthy controls.
Main Methods:
- Study included 82 participants across three groups: amyloidosis, FMF without amyloidosis, and healthy controls.
- Serum Amyloid A1 (SAA1) genotypes were determined using the polymerase chain reaction/restriction fragment length polymorphism (PCR-RFLP) technique.
Main Results:
- The alpha/alpha genotype of SAA1 was the most prevalent in patients with amyloidosis.
- The frequency of the alpha/alpha genotype was significantly higher in the amyloidosis group compared to healthy controls (68% vs. 38%, p<0.05).
Conclusions:
- The SAA1 alpha/alpha genotype is identified as a significant risk factor for AA type amyloidosis in Caucasoid populations.
- Additional research is recommended to understand the association between the gamma/gamma genotype and AA type amyloidosis in Japanese populations.