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. 2022 Apr 26:9:872451.
doi: 10.3389/fnut.2022.872451. eCollection 2022.

Causal Association Between Tea Consumption and Bone Health: A Mendelian Randomization Study

Song Chen  1 , Tianlai Chen  2 , Yibin Chen  3 , Dianhua Huang  1 , Yuancheng Pan  1 , Shunyou Chen  1
Affiliations

Causal Association Between Tea Consumption and Bone Health: A Mendelian Randomization Study

Song Chen et al. Front Nutr. .

Abstract

Background: Much observational research reported that tea consumption decreases the risk of osteoarthritis (OA), rheumatoid arthritis (RA), and osteoporosis (OP) which are the three major bone disorders. However, the observed correlation is inconclusive. To determine the causal relationship between genetically predicted tea intake and OA, RA, and OP, we performed a two-sample Mendelian randomization (MR) study based on large samples.

Methods: The European population's genome-wide association meta-analysis (GWAS) dataset identified SNPs associated with tea consumption was obtained from Neale Lab's analysis of UK Biobank data that comprised 349,376 participants of European ancestry. We extracted genetic data for knee OA (17,885 controls and 4,462 cases), hip OA (50,898 controls and 12,625 cases), and RA (43,923 controls and 14,361 cases) from the UK Biobank and OP cases (93083 controls and 1,175 cases) from FinnGen Data Freeze 2. A MR study was conducted to examine the effect of selected single nucleotide polymorphisms (SNPs) and OA, RA, and OP risk. Several sensitivity analyses were performed with weighted median and inverse-variance weighted methods for estimating the causal effects.

Results: In this MR study, the genetically predicted per one cup increase of tea consumption was not associated with knee OA (OR 1.11,95% CI: 0.79-1.55) using IVW with random effect. Genetic predisposition to tea consumption was not associated with hip OA (OR: 1.20, 95% CI: 0.84-1.71), RA (OR: 1.24 95% CI: 0.81-1.91), and OP (OR: 1.11, 95% CI: 0.89, 1.39). Following the sensitivity analysis, there was no potential pleiotropy.

Conclusion: According to our study, According to our study, there was no statistical power to confirm a causal relationship between tea consumption and the risk of knee OA, hip OA, RA, and OP.

Keywords: SNP; mendelian randomization; osteoarthritis; osteoporosis; rheumatoid arthritis; tea consumption.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
Principles of mendelian randomization study. SNPs, single nucleotide polymorphisms.
FIGURE 2
FIGURE 2
Forest plot of MR study using genetic instruments with knee OA excluding four SNPs (rs11022751; rs1481012; rs2472297; rs4410790); OR, odds ratio; IVW, inverse variance weighted; CI, confidence interval; MR, mendelian randomization; OA, osteoarthritis.
FIGURE 3
FIGURE 3
Forest plot of MR study using genetic instruments with hip OA excluding two SNPs (rs2472297; rs4410790). OR, odds ratio; IVW, inverse variance weighted; CI, confidence interval; MR, mendelian randomization; OA, osteoarthritis.
FIGURE 4
FIGURE 4
The plot of the MR study uses genetic instruments with RA excluding two SNPs (rs10741694); OR, odds ratio; IVW, inverse variance weighted; CI, confidence interval; MR, mendelian randomization; RA, rheumatoid arthritis.
FIGURE 5
FIGURE 5
Forest plot of MR study using genetic instruments with OP. OR, odds ratio; IVW, inverse variance weighted; CI, confidence interval; MR, mendelian randomization; OP, osteoporosis.
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