Q J Med 2003; 96: 575-578
© 2003 Association of Physicians
The interleukin-6 promoter polymorphism in Gaucher disease: a new modifier gene?
From the 1Genetics Institute, 2Gaucher Clinic, and 3Department of Medicine, Shaare Zedek Medical Center, and 4Osteoporosis Center, Hadassah University Hospital, Jerusalem, Israel
Received 3 February 2003 and in revised form 24 April 2003
Background: Individuals with Gaucher disease vary significantly with regard to degree of bone disease, but there are no predictive markers for severity of skeletal involvement.
Aim: To determine the frequency of polymorphisms of interleukin-6 (IL-6) among patients with Gaucher disease, and the relationship to bone mineral density (BMD) and other markers of disease severity.
Design: Case-control study.
Methods: Genotyping for the 174G
C promoter polymorphism of IL-6 was performed in adult patients with Gaucher disease for whom there was concurrent bone mineral density (BMD) data and in healthy Ashkenazi Jewish controls.
Results: The prevalence of allelic variants (58% G/G, 36% G/C, and 6% C/C) was similar in Ashkenazi Jewish adults with Gaucher disease as in Ashkenazi Jewish controls, but significantly different (p < 0.05) from that reported among Caucasians. No statistically significant correlation was found between IL-6 genotypes and BMD or markers of severity of Gaucher disease. Patients with the C/C genotype had relatively mild Gaucher disease.
Discussion: The IL-6 polymorphisms appear to be distributed differently in Ashkenazi Jews than among other Caucasians. In Gaucher disease, the C/C genotype may be associated with a milder Gaucher phenotype, and may serve as a mitigating genetic modifier.
Address correspondence to Dr D. Elstein, Gaucher Clinic, Shaare Zedek Medical Center, P.O. Box 3235, Jerusalem 91031, Israel. e-mail: gaucher{at}szmc.org.il
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