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5-HTTLPR polymorphism and depression risk in Parkinson's disease: an updated meta-analysis

Abstract

The relationship between the 5-hydroxytryptamine transporter gene-linked polymorphic region (5-HTTLPR) and depression in Parkinson's disease (PD) has remained controversial. Therefore, we conducted this meta-analysis to evaluate the relationship between 5-HTTLPR polymorphisms and depression in PD. Relevant online databases were searched for cross-sectional, case–control or cohort studies examining relations between 5-HTTLPR polymorphisms (S/L) and the risk of developing depression of PD using a meta-analysis. Odd ratios (ORs) of 5-HTTLPR polymorphisms (S/L allele genotype) were calculated between depression in PD and PD for each study. Five observational studies were identified. Overall ORs for 5-HTTLPR S-Allele genotype was 1.98 (95% CI 0.92–4.26) in the dominant model, 1.43 (95% CI 1.08–1.90) in the recessive model, 2.64 (95% CI 1.01–6.88) in the additive model, independently. The overall ORs of S-Allele genotype was 1.51 (95% CI 0.63–3.64) for the Caucasian subgroup, and 1.44 (95% CI 1.05–1.98) for the non-Caucasian subgroup in the recessive model. This meta-analysis indicates that the 5-HTTLPR genotype (S/S-Allele) is correlated with an increased depression risk in PD, and this highlights the needs for these people to take some effective approaches (if any) in prevention of depression of PD before its onset.

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Acknowledgements

This study was supported by research grants from the National Natural Science Foundation of China (Grant No. 81871034), the Natural Science Foundation of Heilongjiang Province (Grant no. H2016087), the Natural Science Program of Health and Family Planning Commission of Heilongjiang Province (Grant no. 2016-280), and the Natural Science Program of Jiamusi University (Grant no. JMSURCGG2016-004).

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Correspondence to Pengfei Cheng.

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Cheng, P., Zhang, J., Wu, Y. et al. 5-HTTLPR polymorphism and depression risk in Parkinson's disease: an updated meta-analysis. Acta Neurol Belg 121, 933–940 (2021). https://doi.org/10.1007/s13760-020-01342-1

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  • DOI: https://doi.org/10.1007/s13760-020-01342-1

Keywords

  • 5-Hydroxytryptamine transporter
  • 5-HTTLPR
  • Gene
  • Depression
  • Parkinson's disease