Background
Several studies suggest a role of the growth hormone (GH)/insulin-like growth factor-1 (IGF-1) axis in the pathophysiology of primary osteoarthritis (OA). A common polymorphism of the GH receptor (exon 3 deletion, d3-GHR) is associated with increased GH/IGF-1 activity.
Objective
To study associations between the d3-GHR polymorphism and symptomatic OA.
Methods
In the GARP (Genetics, osteoARthritis and Progression) study, we compared the d3-GHR polymorphism between OA patients and controls. GARP patients were genotyped for seven single nucleotide polymorphisms encompassing the d3-GHR gene, using rs4590183 as proxy for d3-GHR (pairwise r(2)=1). Binary logistic regression models with robust SEs were performed, stratified by sex. For replication, rs4590183 was tested in three additional cohorts. Fixed- and random-effects combined analyses were performed.
Results
In female GARP patients with severe familial OA, d3-GHR was associated with OA (adjusted OR 1.36 (95% CI 1.01 to 1.83), p=0.043), independently of age and body mass index. Combined analysis of all studies showed suggestive evidence for association between d3-GHR and OA (OR=1.17 (95% CI 1.04 to 1.30), p=0.008). Evidence was strongest in hip OA cases, without any evidence for heterogeneity.
Conclusions
In women, the d3-GHR polymorphism was associated with symptomatic OA, especially at the hip site.
Overview publication
Title | Relationship between the functional exon 3 deleted growth hormone receptor polymorphism and symptomatic osteoarthritis in women. |
Date | February 1st, 2014 |
Issue name | Annals of the rheumatic diseases |
Issue number | v73.2:433-6 |
DOI | 10.1136/annrheumdis-2012-202713 |
PubMed | 23740230 |
Authors | |
Keywords | Chondrocytes, Gene Polymorphism, Osteoarthritis |
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