Key result
The LRP5 A1330V polymorphism was not associated with incident fractures in Japanese female rheumatoid arthritis patients, but the 1330VV genotype correlated with hypercholesterolemia (P=0.027).
Why the study?
Is the A1330V polymorphism of the LRP5 gene associated with a risk of self-reported incident fractures and hypercholesterolemia in Japanese female patients with rheumatoid arthritis?
Cohort (n=563)
Is the A1330V polymorphism of the LRP5 gene associated with a risk of self-reported incident fractures and hypercholesterolemia in Japanese female patients with rheumatoid arthritis?
The LRP5 A1330V polymorphism is not a clinically useful marker for predicting fracture risk in Japanese female RA patients, although it is associated with increased serum total cholesterol levels.
Answers are grounded in this paper and cite their sources.
No support for LRP5 A1330V in fracture risk assessment among Japanese women with RA; its hypercholesterolemia link remains hypothesis-generating.
We attempted to determine whether the A1330V polymorphism of the low-density lipoprotein receptor-related protein 5 (LRP5) gene is associated with a risk of self-reported incident fractures and hypercholesterolemia in Japanese patients with rheumatoid arthritis (RA). DNA samples, laboratory data, and clinical data were obtained from 563 female RA patients who participated in the Institute of Rheumatology Rheumatoid Arthritis (IORRA) observational cohort study. A1330V genotyping was performed using a custom TaqMan assay. Multiple logistic regression analyses showed that any incident fracture was significantly associated with older age (P = 0.000000036), high Japanese Health Assessment Questionnaire (J-HAQ) score (P = 0.016), and high daily prednisolone dose (P = 0.031), but not with the A1330V polymorphism, while serum total cholesterol levels >or=220 mg/100 mL were independently correlated with baseline older age (P = 0.00011), low J-HAQ score (P = 0.0098), high body mass index (P = 0.024), 1330VV genotype (P = 0.027), and high daily prednisolone dose (P = 0.031). Our results suggest that this LPR5 polymorphism does not appear to be a clinically useful marker for the prediction of fracture risk in Japanese female RA patients, although it is associated with increased serum total cholesterol levels.
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Furuya et al. (2008) conducted a cohort in Rheumatoid arthritis (n=563). A1330V polymorphism of the LRP5 gene vs. Other genotypes was evaluated on Self-reported incident fractures. The LRP5 A1330V polymorphism was not associated with incident fractures in Japanese female rheumatoid arthritis patients, but the 1330VV genotype correlated with hypercholesterolemia (P=0.027).
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