title: A1330V polymorphism of low-density lipoprotein receptor-related protein 5 gene and self-reported incident fractures in Japanese female patients with rheumatoid arthritis.
abstract: 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.
authors.affiliation: Institute of Rheumatology, Tokyo Women's Medical University, 10-22 Kawada-cho, Shinjuku-ku, Tokyo 162-0054, Japan. furuyat@ior.twmu.ac.jp
authors.forename: Takefumi
authors.initials: T
authors.lastname: Furuya
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Urano
authors.forename: Katsunori
authors.initials: K
authors.lastname: Ikari
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kotake
authors.forename: Satoshi
authors.initials: S
authors.lastname: Inoue
authors.forename: Masako
authors.initials: M
authors.lastname: Hara
authors.forename: Shigeki
authors.initials: S
authors.lastname: Momohara
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Kamatani
authors.forename: Hisashi
authors.initials: H
authors.lastname: Yamanaka
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000150:complications*; D044466:Asian People; D002784:Cholesterol / Q000097:blood; D015331:Cohort Studies; D005260:Female; D050723:Fractures, Bone / Q000453:epidemiology / Q000209:etiology / Q000235:genetics*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D026502:LDL-Receptor Related Proteins / Q000235:genetics*; D060492:Low Density Lipoprotein Receptor-Related Protein-5; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D012307:Risk Factors
chemical_list: D026502:LDL-Receptor Related Proteins; C555482:LRP5 protein, human; D060492:Low Density Lipoprotein Receptor-Related Protein-5; D002784:Cholesterol