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Interaction between ESRα polymorphisms and environmental factors in osteoporosis
Tomoko Sonoda1, Junichi Takada, Kousuke Iba
1Department of Public Health, Sapporo Medical University School of Medicine, 1-17, Chuo-ku, Sapporo, Hokkaido 060-8556, Japan. tsonoda@sapmed.ac.jp
Summary
Genetic predisposition and environmental factors influence osteoporosis risk in Japanese women. Moderate alcohol consumption may reduce osteoporosis risk associated with specific estrogen receptor gene variations.
Area of Science:
- Genetics
- Bone Metabolism
- Environmental Health
Background:
- Postmenopausal osteoporosis is a significant health concern.
- Genetic predisposition and environmental factors are implicated in osteoporosis development.
- Estrogen receptor alpha (ESRα) gene variations may influence bone mineral density (BMD).
Purpose of the Study:
- To investigate the interplay between genetic risk factors and environmental influences on osteoporosis.
- To identify specific single nucleotide polymorphisms (SNPs) in ESRα associated with postmenopausal osteoporosis.
- To assess the interaction between genetic variations and lifestyle factors, such as alcohol consumption, on osteoporosis risk.
Main Methods:
- A case-control study involving 114 Japanese women with postmenopausal osteoporosis and 171 controls.
- Analysis of genetic risk associated with SNPs in estrogen receptors.
- Case-only design to evaluate gene-environment interactions for osteoporosis.
Main Results:
- Minor alleles of rs2077647 and rs2234693 in ESRα were significantly associated with increased osteoporosis risk.
- A specific haplotype (CC) at these risk SNPs showed a strong association with osteoporosis (OR = 3.15).
- Moderate alcohol consumption demonstrated a significant interaction, reducing the genetic risk of osteoporosis (OR = 0.22).
Conclusions:
- Specific genetic variations in ESRα are linked to an elevated risk of postmenopausal osteoporosis.
- Environmental factors, particularly moderate alcohol consumption, can modify the genetic predisposition to osteoporosis.
- These findings highlight the complex interplay between genetics and lifestyle in bone health and osteoporosis development.
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