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Liu B, Fan K, Zheng X, Zhang Y, Bai S, Liu Z, Xu S, Su Z, Cao H, Zhang H, Zhang S. Genetic associations between ULK3 and epilepsy: a two-sample Mendelian randomization study. Front Neurol 2024; 15:1376314. [PMID: 39188705 PMCID: PMC11346342 DOI: 10.3389/fneur.2024.1376314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 07/16/2024] [Indexed: 08/28/2024] Open
Abstract
Background and objectives Observational studies have suggested that a multitude of pathological processes and biomolecules are involved in the initiation and development of epilepsy, and ULK3 is linked to the nervous system. However, it remains uncertain whether this association between ULK3 and epilepsy is causal and the direction of any causal relationship. This study employs a two-sample Mendelian randomization (MR) method to investigate the relationship between ULK3 and the risk of epilepsy. Methods We analyzed genome-wide association study (GWAS) summary statistics for ULK3 (sample size = 3,301), focal epilepsy (sample size = 39,348), and generalized epilepsy (sample size = 33,446). Bidirectional MR analyses were conducted to explore these relationships. We selected a set of single nucleotide polymorphisms (SNPs) with an association threshold of less than 1 × 10-5 as instrumental variables for further analysis. Various MR methods, including Inverse Variance Weighted, Weighted Median, MR-Egger Regression, Simple Model, Weighted Model, and Robust Adjustment Profile Score were used. Sensitivity analyses were performed to ensure the robustness of the results. Results Our MR analyses revealed a causal relationship where an increased level of ULK3 was associated with a decreased risk of focal epilepsy (odds ratio = 0.92, 95% confidence interval: 0.86-1.00, p = 0.041). No significant heterogeneity (Q = 7.85, p = 0.165) or horizontal pleiotropy (Egger regression intercept = 0.0191, p = 0.415) was detected. However, in the reverse analysis, we found no significant causal effect of focal epilepsy on ULK3 (p > 0.05). Furthermore, no significant causation was identified between ULK3 and generalized epilepsy (p > 0.05). Conclusion This study suggests a causal relationship between ULK3 and the risk of focal epilepsy from a genetic perspective. Nevertheless, further investigation is needed to understand the role of ULK3 in epilepsy fully.
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Affiliation(s)
- Baolai Liu
- Department of Neurosurgery, Shanxi Provincial People's Hospital, The Affiliated People’s Hospital of Shanxi Medical University, Taiyuan, China
| | - Keyi Fan
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Xinyi Zheng
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Yaochen Zhang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Shangkai Bai
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Zhentong Liu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Shuhan Xu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Zhihao Su
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Huiting Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Heyi Zhang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
| | - Shengxiao Zhang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, Shanxi, China
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Li Z, Wu X, Yan Z, Cui Y, Liu Y, Cui S, Wang Y, Liu T. Unveiling the muscle-brain axis: A bidirectional mendelian randomization study investigating the causal relationship between sarcopenia-related traits and brain aging. Arch Gerontol Geriatr 2024; 123:105412. [PMID: 38513381 DOI: 10.1016/j.archger.2024.105412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/06/2024] [Accepted: 03/11/2024] [Indexed: 03/23/2024]
Abstract
BACKGROUND Observational studies suggest an association between sarcopenia-related traits and brain aging, but whether this association reflects a causal relationship remains unclear. This study aims to employ Mendelian randomization (MR) methods to investigate the causal impact of sarcopenia-related traits on brain aging. METHODS This study presents a comprehensive analysis of genome-wide association study (GWAS) summary data associated with sarcopenia-related traits. The data were derived from a large-scale cohort, encompassing measures such as grip strength, lean body mass, and walking pace. Measurements of brain aging were obtained from neuroimaging genetics, utilizing meta-analysis (ENIGMA) to combine magnetic resonance imaging (MRI) data from 33,992 participants. The primary methodology employed in this analysis was the inverse-variance-weighted method (IVW). Additionally, sensitivity analyses were conducted, to assess heterogeneity and pleiotropy. RESULT Appendicular lean mass(ALM) is negatively correlated with Pallidum aging; Whole body fat-free mass shows a negative correlation with Amygdala aging; Leg fat-free mass (left) and Leg fat-free mass (right) are negatively correlated with Pallidum aging; Usual walking pace is positively correlated with Nucleus Accumbens aging. Cerebellum WM aging is negatively correlated with Leg fat-free mass (left) and Leg fat-free mass (right); Hippocampus aging is negatively correlated with Hand grip strength (left) and Hand grip strength (right). Ventricles aging is positively correlated with Usual walking pace; Nucleus Accumbens aging is positively correlated with Leg fat-free mass (left) and Leg fat-free mass (right); Putamen aging is positively correlated with ALM. CONCLUSION Our study confirms that reduced muscle mass speeds up brain aging. Walking too fast raises the risk of brain aging, while maintaining or increasing appendicular lean mass, overall muscle mass, and muscle mass in both legs lowers the risk of brain aging.
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Affiliation(s)
- Zefang Li
- Department of The First Clinical medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xueqiang Wu
- Department of Health Science, Shandong University of Traditional Chinese Medicine, Jinan, China.
| | - Zhaojun Yan
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine,Jinan, China.
| | - Yiping Cui
- Department of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yueling Liu
- School of mental health and psychological science, Anhui Medical University,Hefei, China
| | - Song Cui
- Department of The First Clinical medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yining Wang
- Department of The First Clinical medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Tianyu Liu
- Department of The First Clinical medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
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Chen Y, Huang L, Luo Z, Han D, Luo W, Wan R, Li Y, Ge Y, Lin WW, Xie Y, Sun M, Wang Q, Li Z, Chen S, Yang Y, Huang B, Xu Y. Pantothenate-encapsulated liposomes combined with exercise for effective inhibition of CRM1-mediated PKM2 translocation in Alzheimer's therapy. J Control Release 2024; 373:336-357. [PMID: 38996921 DOI: 10.1016/j.jconrel.2024.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 07/02/2024] [Accepted: 07/04/2024] [Indexed: 07/14/2024]
Abstract
Alzheimer's disease (AD) is a complex neurodegenerative condition characterized by metabolic imbalances and neuroinflammation, posing a formidable challenge in medicine due to the lack of effective treatments. Despite considerable research efforts, a cure for AD remains elusive, with current therapies primarily focused on symptom management rather than addressing the disease's underlying causes. This study initially discerned, through Mendelian randomization analysis that elevating pantothenate levels significantly contributes to the prophylaxis of Alzheimer's disease. We explore the therapeutic potential of pantothenate encapsulated in liposomes (Pan@TRF@Liposome NPs), targeting the modulation of CRM1-mediated PKM2 nuclear translocation, a critical mechanism in AD pathology. Additionally, we investigate the synergistic effects of exercise, proposing a combined approach to AD treatment. Exercise-induced metabolic alterations share significant similarities with those associated with dementia, suggesting a potential complementary effect. The Pan@TRF@Liposome NPs exhibit notable biocompatibility, showing no liver or kidney toxicity in vivo, while demonstrating stability and effectiveness in modulating CRM1-mediated PKM2 nuclear translocation, thereby reducing neuroinflammation and neuronal apoptosis. The combined treatment of exercise and Pan@TRF@Liposome NP administration in an AD animal model leads to improved neurofunctional outcomes and cognitive performance. These findings highlight the nanoparticles' role as effective modulators of CRM1-mediated PKM2 nuclear translocation, with significant implications for mitigating neuroinflammation and neuronal apoptosis. Together with exercise, this dual-modality approach could offer new avenues for enhancing cognitive performance and neurofunctional outcomes in AD, marking a promising step forward in developing treatment strategies for this challenging disorder.
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Affiliation(s)
- Yisheng Chen
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China; Department of Medical Sciences, Ningde Normal University College of Medical Sciences, No. 1 Xueyuan Road, Jiaocheng District, Ningde City, Fujian, China
| | - Lei Huang
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, 01605, MA, USA.
| | - Zhiwen Luo
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Dan Han
- Department of Emergency Medicine and Intensive Care, Songjiang Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Luo
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Renwen Wan
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Yan Li
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Yunshen Ge
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Wei-Wei Lin
- Department of Neurosurgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou 310009, Zhejiang, China
| | - Yuchun Xie
- Jiangsu Province Geriatric Hospital, China
| | - Mingming Sun
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Qian Wang
- Department of Central Laboratory, The Affiliated Taian City Central Hospital of Qingdao University, Taian, Shandong, China
| | - Zhiwei Li
- Clinical Laboratory Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, PR China
| | - Shiyi Chen
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China.
| | - Yi Yang
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China.
| | - Bin Huang
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China.
| | - Yuzhen Xu
- Department of Rehabilitation, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, China.
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Gao N, Yu Z, Fan Y, Jiang X, Hu T. Impact of negative emotions on upper gastrointestinal diseases: A Mendel randomization study. PLoS One 2024; 19:e0304121. [PMID: 38995968 PMCID: PMC11244763 DOI: 10.1371/journal.pone.0304121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 05/07/2024] [Indexed: 07/14/2024] Open
Abstract
Mendelian randomization method is a powerful tool in epidemiological research. The core idea is to use genetic variation as a tool to assess the causal relationship between risk factors and specific diseases. Confounding factors are important interference factors for causal inference in epidemiological studies, and genetic variation in Mendelian randomization studies follows the principle of random distribution of alleles to offspring, which is similar to randomized controlled trials. Mendel 's randomization method can effectively avoid the confounding factors, reverse causality in observational studies and the representativeness and feasibility of randomized controlled trials. Previous observational studies have reported a relationship between negative emotions and upper gastrointestinal disease. However, whether this relationship is causal remains unclear. We aimed to evaluate the causal relationship between negative emotions and upper gastrointestinal diseases using two-sample Mendelian randomization (MR). Three sets of genetic instruments from the database were obtained for analysis, including 12 anxiety-related single nucleotide polymorphisms (SNPs), 46 depression-related SNPs, and 58 nervous-related SNPs. SNPs were filtered using the Phenoscanner website, and the inverse variance weighted method, weighted median method, MR-Egger regression, MR pleiotropy residual sum, and outlier test were used for analysis. In inverse variance weighted analysis, anxiety and depression had an effect on gastroduodenal ulcer (p = 2.849×10-3, β = 4.908, 95% CI = 1.684-8.132; and p = 6.457×10-4, β = 1.767, 95% CI = 0.752-2.782, respectively). Additionally, depression had an effect on diseases of the esophagus, stomach, and duodenum (p = 3.498×10-5, β = 0.926, 95% CI = 0.487-1.364). Cochran's Q-derived p-values were 0.457, 0.603, and 0.643, and MR-Egger intercept-derived p-values were 0.697, 0.294, and 0.362, respectively. Here, we show that anxiety and depression have a causal relationship with gastroduodenal ulcers, and depression has a causal relationship with diseases of the esophagus, stomach, and duodenum.
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Affiliation(s)
- Nan Gao
- Changchun University of Chinese Medicine, Changchun, China
| | - Zhun Yu
- Changchun University of Chinese Medicine, Changchun, China
| | - Yu Fan
- Changchun University of Chinese Medicine, Changchun, China
| | - Xue Jiang
- Changchun University of Chinese Medicine, Changchun, China
| | - Ting Hu
- Changchun University of Chinese Medicine, Changchun, China
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Luo X, Ruan Z, Liu L. Causal relationship between metabolic syndrome and hidradenitis suppurativa: A two-sample bidirectional Mendelian randomization study. J Dermatol 2024. [PMID: 38874446 DOI: 10.1111/1346-8138.17328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 04/13/2024] [Accepted: 05/26/2024] [Indexed: 06/15/2024]
Abstract
Observational studies have suggested an association between metabolic syndrome (MetS) and hidradenitis suppurativa (HS), but whether this relationship is causal remains unclear. Elucidating the causal direction could provide insights into disease mechanisms and potential interventions. We performed bidirectional two-sample Mendelian randomization (MR) using summary statistics from genome-wide association studies (GWAS) of MetS and HS. For validation, we replicated the MetS analysis using data from an independent GWAS. We applied multiple MR methods, primarily inverse variance-weighted (IVW) regression, and conducted sensitivity analyses to assess heterogeneity and pleiotropy. The MR analysis demonstrated MetS causally increased HS risk (IVW odds ratio [OR], 1.428 [95% CI, 1.193-1.710]; p < 0.001), with consistent evidence from sensitivity analyses. However, HS did not appear to causally influence MetS risk (IVW OR, 1.008 [95% CI, 0.988-1.028]; p = 0.438). This study provides evidence that MetS causally increases the risk of developing HS. However, we found no evidence for a causal relationship in the reverse direction from HS to MetS. Further research is warranted to elucidate the mechanisms underlying the identified causal association between MetS and subsequent HS development.
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Affiliation(s)
- Xinxin Luo
- Department of Pharmacy, Jiangxi Provincial People's Hospital & The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
| | - Zhichao Ruan
- First School of Clinical Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Ling Liu
- Department of Pharmacy, Jiangxi Provincial People's Hospital & The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
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Xu D, Wu B. Investigating the causal association between systemic lupus erythematosus and migraine using Mendelian randomization analysis. Headache 2024; 64:624-631. [PMID: 38679912 DOI: 10.1111/head.14723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 02/09/2024] [Accepted: 02/24/2024] [Indexed: 05/01/2024]
Abstract
OBJECTIVE To assess whether systemic lupus erythematosus (SLE) may be genetically causally associated with migraine, including the two primary subtypes: migraine with aura (MWA) and migraine without aura (MWoA). BACKGROUND The association between SLE and migraine has been investigated extensively. Previous studies have shown a higher prevalence of migraine in patients with SLE, although the exact relationship remains unclear. This study investigated the potential causal association between SLE and migraine using the powerful analytical tool of Mendelian randomization (MR). METHODS We performed two-sample MR analysis of publicly available summary statistic datasets using inverse variance-weighted (IVW), weighted median, and MR-Egger methods based on an SLE genome-wide association study (GWAS; 5201 cases; 9066 controls; the exposure frequency is 36.5%) as an exposure and migraine GWAS (15,905 cases; 264,662 controls) in individuals with European ancestry as outcomes, focusing on the two migraine subtypes MWA (6780 cases; 264,662 controls) and MWoA (5787 cases; 264,662 controls). Thepleiotropy and heterogeneity were performed. RESULTS We selected 42 single-nucleotide polymorphisms from SLE GWAS as instrumental variables (IVs) for SLE on migraine, and 41 SNP IVs for SLE on MWA or MWoA. The IVW (odds ratio [OR] = 1.01, 95% confidence interval [CI] = [0.99, 1.03], p = 0.271), weighted median (OR = 1.00, 95% CI = [0.97, 1.03], p = 0.914), and MR-Egger (OR = 1.04, 95% CI = [0.99, 1.09], p = 0.153) methods showed no causal effect of SLE on migraine. A causal effect of SLE was observed on MWA (IVW: OR = 1.05, 95% CI = [1.02, 1.08], p = 0.001; weighted median: OR = 1.05, 95% CI = [1.01, 1.10], p = 0.018; MR-Egger: OR = 1.07, 95% CI = [1.01, 1.14], p = 0.035 and pIVW < 0.017 [Bonferroni correction]) but not MWoA (IVW: OR = 0.99, 95% CI = [0.96, 1.02], p = 0.331; weighted median: OR = 0.98, 95% CI = [0.94, 1.03], p = 0.496; MR-Egger: OR = 1.02, 95% CI = [0.95, 1.09], p = 0.652). The results showed no significant pleiotropy or heterogeneity. CONCLUSION Our MR analysis demonstrated the complex relationship between SLE and migraine, suggesting a potential effect of SLE on the risk of MWA but not MWoA. These findings can aid in the development of improved subtype-specific management of migraine in patients with SLE.
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Affiliation(s)
- Danfeng Xu
- Shaoxing Central Hospital, The Hospital Affiliated to Shaoxing University, Shaoxing, China
- Central Laboratory, The Central Hospital of Shaoxing University, Shaoxing, China
| | - Bing Wu
- Shaoxing Central Hospital, The Hospital Affiliated to Shaoxing University, Shaoxing, China
- Central Laboratory, The Central Hospital of Shaoxing University, Shaoxing, China
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Zhou C, Yang L, Liu C, Ma H, Yang F, Chen L. Associations between special diet and incidence risk of osteoporosis: a Mendelian randomization study. Front Public Health 2024; 12:1364735. [PMID: 38873319 PMCID: PMC11171419 DOI: 10.3389/fpubh.2024.1364735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 05/06/2024] [Indexed: 06/15/2024] Open
Abstract
Introduction Osteoporosis is a prevalent challenge in clinical orthopedics, affecting a significant percentage of individuals aged 50 and above. The goal of this study was to comprehensively understand the relationships between a specialized dietary regimen and the risk of developing osteoporosis. Methods This study employed extensive genome-wide association study (GWAS) summary statistics derived from the UK Biobank. It encompassed 8 kinds of special diets and 7 datasets pertaining to osteoporosis and associated symptoms. The principal analytical approach employed was the inverse-variance weighted method. Additionally, sensitivity analysis was employed to elucidate the diverse multiplicity patterns observed in the final model. Results Our results showed that there is significant evidence that a gluten-free diet is associated with osteoporosis [odds ratio (OR): 1.080, 95% confidence interval (CI): 1.048-1.112, p = 4.23E-07)]. Furthermore, there exists a suggestive link between the three distinct dietary approaches and osteoporosis [(OR: 0.949, 95%CI: 0.929-0.970, p = 3.00E-06) for comprehensive consumption; (OR: 1.053, 95%CI: 1.018-1.089, p = 2.23E-03) for abstaining from wheat consumption; (OR: 1.036, 95%CI: 1.005-1.068, p = 1.97E-02) for abstaining from sugar consumption]. No additional correlation between the special dietary regimens and osteoporosis has been observed. Conclusion Our research has uncovered a notable correlation between a gluten-free diet and the occurrence of osteoporosis. Furthermore, it exerts a promoting influence on the onset of osteoporosis, which stands in direct contradiction to the therapeutic principles for Celiac Disease's complications. As such, a novel association among these three elements is postulated.
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Affiliation(s)
- Changwen Zhou
- The First Clinical Medical Research Institute, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Lixue Yang
- The First Clinical Medical Research Institute, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
- Affiliation Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Ce Liu
- The First Clinical Medical Research Institute, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Hongzhong Ma
- The First Clinical Medical Research Institute, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Feng Yang
- The First Clinical Medical Research Institute, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
- Affiliation Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Liheng Chen
- Affiliation Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
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Hu H, Zhou M, Zhao Y, Mao J, Yang X. Effects of immune cells on ischemic stroke and the mediating roles of metabolites. Front Neurol 2024; 15:1405108. [PMID: 38863512 PMCID: PMC11165215 DOI: 10.3389/fneur.2024.1405108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 05/13/2024] [Indexed: 06/13/2024] Open
Abstract
Objective Previous studies have not shown an association between IgD-CD24-B-cell absolute count (IgD-CD24-AC) and ischemic stroke (IS). Our study aimed to assess the causal effect of IgD-CD24-AC on IS and to explore the role of ascorbic acid 2-sulfate (AA2S) as a potential mediator. Methods Our study was based on the largest available genome-wide association study (GWAS). Inverse variance weighting (IVW), MR-Egger, weighted median (WMN), simple mode, and weighted mode methods were used to assess causal effects, with IVW as the primary outcome. Subsequently, we further performed a two-step MR analysis to evaluate whether AA2S mediated this causal effect. In addition, several sensitivity analyses were conducted to evaluate heterogeneity, including Cochran's Q test, the MR-Egger intercept test, the MR-PRESSO global test, and the leave-one-out analysis. Results Using the IVW approach, the risk ratio of IgD-CD24-AC to IS was estimated to be 1.216 (95% CI = 1.079-1.371, p = 0.001). This result was supported by the WMN method (OR = 1.204, 95% CI = 1.020-1.421, p = 0.028) and the MR-Egger method (OR = 1.177, 95% CI = 0.962-1.442, p = 0.133). We also observed the same trend with the simple model and weighted model. Furthermore, the proportion of genetically predicted IgD-CD24-AC mediated through AA2S levels was 3.73%. Conclusion Our study revealed a causal relationship between IgD-CD24-AC and IS, a small part of which was mediated by AA2S. These findings offer critical insights for developing immune-targeted therapies in the future and lay a strong foundation for advancements in precision medicine.
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Affiliation(s)
| | | | | | | | - Xiaokai Yang
- Postgraduate Training Base Alliance of Wenzhou Medical University, Third Afffliated Hospital of Shanghai University (Wenzhou People’s Hospital), Wenzhou, China
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Xu D, Wu B. Association between systemic lupus erythematosus and osteoporosis: a mendelian randomization analysis. BMC Rheumatol 2024; 8:17. [PMID: 38711124 PMCID: PMC11071324 DOI: 10.1186/s41927-024-00388-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 04/28/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND Systemic Lupus Erythematosus (SLE) and Osteoporosis are two prevalent medical conditions. Previous studies have suggested a possible correlation between SLE and osteoporosis, though the underpinning causal relationship remains largely unknown. The current study aimed to elucidate the causal association between SLE and osteoporosis by employing a Mendelian randomization (MR) approach. METHODS We performed two-sample MR analysis using the inverse variance-weighted (IVW), weighted median, and MR-Egger methods on publicly available summary statistics datasets using a SLE genome-wide association study (GWAS) as an exposure and osteoporosis GWASs in people with East Asia ancestry as outcomes. The pleiotropy and heterogeneity were examined using a variety of techniques, including the MR-Egger intercept, the MR-PRESSO approach, and the Cochran's Q test. RESULTS We selected 26 single-nucleotide polymorphisms from a SLE GWAS as instrumental variables for osteoporosis. The IVW (p < 0.05) method results support a potential association between SLE and osteoporosis. MR-Egger intercept (p = 0.82) and MR-PRESSO global test (p = 0.80) did not suggest evidence of horizontal or directional pleiotropy. Cochran's Q test (p = 0.78) showed that there was no heterogeneity between IVs. CONCLUSION The results of MR analysis indicated that SLE is likely associated with an increased risk of osteoporosis incidence. Our findings highlight the need for increased awareness the potential risk of osteoporosis among SLE patients.
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Affiliation(s)
- Danfeng Xu
- Department of Orthopaedics, Shaoxing Central Hospital, Hua-yu Road 1, Keqiao, Shaoxing, 312030, People's Republic of China
- The Central Hospital of Shaoxing University, Shaoxing, China
- Central laboratory, Shaoxing Central Hospital, the Central Hospital of Shaoxing University, Shaoxing, China
| | - Bing Wu
- Department of Orthopaedics, Shaoxing Central Hospital, Hua-yu Road 1, Keqiao, Shaoxing, 312030, People's Republic of China.
- The Central Hospital of Shaoxing University, Shaoxing, China.
- Central laboratory, Shaoxing Central Hospital, the Central Hospital of Shaoxing University, Shaoxing, China.
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Wu J, Tao G, Xiao H. Association of different milk fat content with coronary artery disease and myocardial infarction risk: A Mendelian randomization study. PLoS One 2024; 19:e0300513. [PMID: 38598469 PMCID: PMC11006182 DOI: 10.1371/journal.pone.0300513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 02/29/2024] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND Numerous observational studies have investigated on the correlation of whole, semi-skimmed, and skimmed milk with coronary artery disease (CAD) and myocardial infarction (MI) risk; However, no consensus has been reached and evidence on any causal links between these exposures and outcomes remains unclear. This study aimed to conduct univariate and multivariate Mendelian randomization (MR) analyses, using publicly released genome-wide association study summary statistics (GWAS) from the IEU GWAS database, to ascertain the causal association of milk with various fat content with CAD and MI risk. METHODS For the exposure data, 29, 15, and 30 single-nucleotide polymorphisms for whole milk, semi-skimmed milk, and skimmed milk, respectively, obtained from 360,806 Europeans, were used as instrumental variables. CAD and MI comprised 141,217 and 395,795 samples, respectively. We used inverse variance weighted (IVW), weighted median, MR-Egger regression, and MR Pleiotropy Residual Sum and Outlier analyses to determine whether pleiotropy and heterogeneity could skew the MR results. Sensitivity tests were conducted to verify the robustness of the results. RESULTS After adjusting for false discovery rates (FDR), we discovered proof that skimmed milk intake is a genetically predicted risk factor for CAD (odds ratio [OR] = 5.302; 95% confidence interval [CI] 2.261-12.432; P < 0.001; FDR-corrected P < 0.001) and MI (OR = 2.287; 95% CI 1.218-4.300; P = 0.010; FDR-corrected P = 0.009). Most sensitivity assessments yielded valid results. Multivariable MR for CAD and MI produced results consistent with those obtained using the IVW method. There was no causal relationship between whole or semi-skimmed milk, and CAD or MI. CONCLUSION Our findings indicate that the consumption of skimmed milk may increase the risk of CAD and MI. This evidence may help inform dietary recommendations for preventing cardiovascular disease. Further studies are required to elucidate the underlying mechanisms.
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Affiliation(s)
- Jiacan Wu
- Department of Cardiology, The First Hospital of Chongqing Medical University, Chongqing, China
| | - Guanghong Tao
- Department of Cardiology, The First Hospital of Chongqing Medical University, Chongqing, China
| | - Hua Xiao
- Department of Cardiology, The First Hospital of Chongqing Medical University, Chongqing, China
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11
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Chen B, Wang C, Li W. Serum albumin levels and risk of atrial fibrillation: a Mendelian randomization study. Front Cardiovasc Med 2024; 11:1385223. [PMID: 38655495 PMCID: PMC11035896 DOI: 10.3389/fcvm.2024.1385223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/26/2024] [Indexed: 04/26/2024] Open
Abstract
Objective Although several observational studies have linked serum albumin to cardiovascular disease and considered it as an important biomarker, little is known about whether increasing or maintaining serum albumin levels can effectively improve the prognosis of patients with atrial fibrillation. Therefore, this study aims to further explore the causal relationship between serum albumin and atrial fibrillation and its potential mechanism. Method Using data from large-scale genome-wide association studies, we conducted a two-sample Mendelian randomization (MR) analysis and a mediation MR analysis, using serum albumin as the exposure variable and atrial fibrillation as the outcome variable. We included 486 serum metabolites as potential mediating factors. To increase the robustness of the analysis, we applied five statistical methods, including inverse variance weighted, weighted median, MR-Egger, simple mode, and weighted mode. Validate the MR results using Bayesian weighted Mendelian randomization method. Result The results of the MR analysis indicate a significant inverse association between genetically predicted serum albumin concentration (g/L) and the risk of atrial fibrillation (Beta = -0.172, OR = 0.842, 95% CI: 0.753-0.941, p = 0.002). Further mediation MR analysis revealed that serum albumin may mediate the causal relationship with atrial fibrillation by affecting two serum metabolites, docosatrienoate and oleate/vaccenate, and the mediating effect was significant. In addition, all our instrumental variables showed no heterogeneity and level-multiplicity in the MR analysis. To verify the stability of the results, we also conducted a sensitivity analysis using the leave-one-out method, and the results further confirmed that our findings were robust and reliable. Finally, we conducted a validation using the Bayesian weighted Mendelian randomization method, which demonstrated the reliability of our causal inference results. Conclusion This study strongly demonstrates the causal relationship between serum albumin and reduced risk of atrial fibrillation through genetic methods, and reveals the key mediating role of two serum metabolites in this relationship. These findings not only provide a new perspective for our understanding of the role of serum albumin in atrial fibrillation, but also provide new ideas for the prevention and treatment strategies of atrial fibrillation.
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Affiliation(s)
- Bohang Chen
- The First Clinical Medical College, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Chuqiao Wang
- The First Clinical Medical College, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
| | - Wenjie Li
- Department of Cardiovascular Medicine, Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China
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12
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Kirwan R, Mazidi M, Butler T, Perez de Heredia F, Lip GYH, Davies IG. The association of appendicular lean mass and grip strength with low-density lipoprotein, very low-density lipoprotein, and high-density lipoprotein particle diameter: a Mendelian randomization study of the UK Biobank cohort. EUROPEAN HEART JOURNAL OPEN 2024; 4:oeae019. [PMID: 38595990 PMCID: PMC11003544 DOI: 10.1093/ehjopen/oeae019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 03/08/2024] [Accepted: 03/12/2024] [Indexed: 04/11/2024]
Abstract
Aims Reduced muscle mass and reduced strength are frequently associated with both alterations in blood lipids and poorer cardiometabolic outcomes in epidemiological studies; however, a causal association cannot be determined from such observations. Two-sample Mendelian randomization (MR) was applied to assess the association of genetically determined appendicular lean mass (ALM) and handgrip strength (HGS) with serum lipid particle diameter. Methods and results Mendelian randomization was implemented using summary-level data from the largest genome-wide association studies on ALM (n = 450 243), HGS (n = 223 315), and lipoprotein [low-density lipoprotein (LDL), very LDL (VLDL), and high-density lipoprotein (HDL)] particle diameters (n = 115 078). Inverse variance-weighted (IVW) method was used to calculate the causal estimates. Weighted median-based method, MR-Egger, and leave-one-out method were applied as sensitivity analysis. Greater ALM had a statistically significant positive effect on HDL particle diameter (MR-Egger: β = 0.055, SE = 0.031, P = 0.081; IVW: β = 0.068, SE = 0.014, P < 0.001) and a statistically significant negative effect on VLDL particle diameter (MR-Egger: β = -0.114, SE = 0.039, P = 0.003; IVW: β = -0.081, SE = 0.017, P < 0.001). Similarly, greater HGS had a statistically significant positive effect on HDL particle diameter (MR-Egger: β = 0.433, SE = 0.184, P = 0.019; IVW: β = 0.121, SE = 0.052, P = 0.021) and a statistically significant negative effect on VLDL particle diameter (MR-Egger: β = -0.416, SE = 0.163, P = 0.011; IVW: β = -0.122, SE = 0.046, P = 0.009). There was no statistically significant effect of either ALM or HGS on LDL particle diameter. Conclusion There were potentially causal associations between both increasing ALM and HGS and increasing HDL particle size and decreasing VLDL particle size. These causal associations may offer possibilities for interventions aimed at improving cardiovascular disease risk profile.
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Affiliation(s)
- Richard Kirwan
- Research Institute of Sport and Exercise Science, Liverpool John Moores University, Liverpool, UK
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University, Liverpool Heart and Chest Hospital, Liverpool, UK
| | - Mohsen Mazidi
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University, Liverpool Heart and Chest Hospital, Liverpool, UK
- Clinical Trial Service Unit, Epidemiological Studies Unit, Nuffield Department of Population Health, University of Oxford, Old Road Campus, Roosevelt Dr., Doll Bldg, Oxford, OX3 7LF, UK
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Tom Butler
- School of Applied Health and Social Care and Social Work, Faculty of Health, Social Care and Medicine, Edge Hill University, Ormskirk, UK
| | - Fatima Perez de Heredia
- School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, UK
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University, Liverpool Heart and Chest Hospital, Liverpool, UK
- Danish Center for Clinical Health Services Research, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Ian G Davies
- Research Institute of Sport and Exercise Science, Liverpool John Moores University, Liverpool, UK
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University, Liverpool Heart and Chest Hospital, Liverpool, UK
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Liu J, Yu H, Wang Q, Zhong J, Yao C, Chen J, Diao L. Associations of hyperthyroidism with epilepsy: a Mendelian randomization study. Sci Rep 2024; 14:4733. [PMID: 38413695 PMCID: PMC10899576 DOI: 10.1038/s41598-024-54933-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 02/19/2024] [Indexed: 02/29/2024] Open
Abstract
Prior studies have revealed an increased susceptibility to epilepsy in hyperthyroid individuals, but the genetic basis of the hyperthyroidism-epilepsy relationship is not fully comprehended, prompting this study to explore this potential association. We conducted a two-sample Mendelian randomization (TSMR) study to explore the relationship between hyperthyroidism and epilepsy by utilizing aggregated statistics from Genome-Wide Association Studies (GWAS). Data for hyperthyroidism were derived from a GWAS encompassing 462,933 participants, while epilepsy data were sourced from the International League Against Epilepsy (ILAE) consortium. Five distinct methods were employed for TSMR analysis, which included the inverse variance weighting method, MR Egger method, weighted median method, simple model, and weighted model. In our sensitivity analysis, we employed the MR Egger and MR PRESSO methods to assess pleiotropy, and inverse variance weighting and MR Egger in Cochran's Q statistics to assess heterogeneity. In the IEU database, utilizing the MR-Egger method, we obtained an odds ratio (OR) of 2.631 (95% CI 0.608, 9.796) with a p-value of 0.122. Meanwhile, employing the Weighted Median method yielded an OR of 1.813 (95% CI 0.786, 4.181) with a p-value of 0.163. The IVW method exhibited an OR of 1.986 (95% CI 1.127, 3.502) with a p-value of 0.018. In the assessment of heterogeneity, the MR-Egger method produced a Q statistic of 65.205, accompanied by a p-value of 0.087, while the IVW method recorded a Q statistic of 66.668 with a p-value of 0.083. The multifactorial analysis results showed an intercept term with a standard error (SE) value of 0.009 and a p-value of 0.291. In the FinnGen database, employing the MR-Egger method for all epilepsy data, we observed an OR of 0.952 (95% CI 0.831, 1.093) with a p-value of 0.539. Simultaneously, the Weighted Median method produced an OR of 0.986 (95% CI 0.953, 1.021) with a p-value of 0.423. The IVW method indicated an OR of 0.992 (95% CI 0.965, 1.019) with a p-value of 0.541. The MR-Egger method's assessment of heterogeneity resulted in a Q statistic of 2.671, associated with a p-value of 0.445, while the IVW method generated a Q statistic of 3.011 with a p-value of 0.556. The multifactorial analysis results displayed an intercept term with a SE-value of 0.019 and a p-value of 0.601. Sensitivity analysis found no evidence of horizontal pleiotropy or heterogeneity. Hyperthyroidism was found to be causally related to all epilepsy but had no effect on other types of epilepsy.
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Affiliation(s)
- Jinwen Liu
- Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Han Yu
- Harbin Medical University, Harbin, China
| | - Qin Wang
- Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Jie Zhong
- The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, 530023, China
| | - Chunyuan Yao
- Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Jiangwei Chen
- Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Limei Diao
- The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, 530023, China.
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14
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Chao C, Wang M, Mei K, Ma C, Qian Y, Zhang X. An inverse causal relationship between serum 25-hydroxyvitamin D levels and pulmonary hypertension: A two-sample Mendelian randomization study. Pulm Circ 2024; 14:e12350. [PMID: 38456156 PMCID: PMC10918714 DOI: 10.1002/pul2.12350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/22/2024] [Accepted: 02/09/2024] [Indexed: 03/09/2024] Open
Abstract
Observational studies have confirmed that 25-hydroxyvitamin D (25(OH)D) is associated with pulmonary hypertension (PH), but the causal association between each other is unclear. Therefore, Mendelian randomization (MR) method was performed to validate the causal association between PH and serum 25(OH)D levels. The summary data for 25(OH)D and PH were from the National Human Genome Research Institute-European Bioinformatics Institute. Catalog of human genome-wide association studies and FinnGen biobank consortium. MR analysis was utilized to explore the potential causal association between PH and 25(OH)D. To evaluate this association, inverse variance weighting was considered as the primary method. Cochran's Q test, MR-Egger intercept test, and "leave-one-out" sensitivity analyses were utilized to control the pleiotropy and heterogeneity in the study. Two-sample MR analysis revealed an inverse causal relationship between 25(OH)D and PH (odds ratio: 0.376, 95% confidence interval: 0.162-0.876, p = 2.334 × 10-2). There was no significant heterogeneity and pleiotropy. The present study confirmed the inverse causal relationship between 25(OH)D and PH. This pathway may provide another treatment pathway in PH. Further studies to elucidate this pathway is indicated.
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Affiliation(s)
- Ce Chao
- Department of Cardiothoracic SurgeryThe Third Affiliated Hospital of Soochow UniversityChangzhouChina
| | - Min Wang
- Department of Cardiothoracic SurgeryThe Third Affiliated Hospital of Soochow UniversityChangzhouChina
| | - Kun Mei
- Department of Cardiothoracic SurgeryThe Third Affiliated Hospital of Soochow UniversityChangzhouChina
| | - Chao Ma
- Department of Cardiothoracic SurgeryThe Third Affiliated Hospital of Soochow UniversityChangzhouChina
| | - Yongxiang Qian
- Department of Cardiothoracic SurgeryThe Third Affiliated Hospital of Soochow UniversityChangzhouChina
| | - Xiaoying Zhang
- Department of Cardiothoracic SurgeryThe Third Affiliated Hospital of Soochow UniversityChangzhouChina
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15
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Wang J, Zhang B, Peng L, Wang J, Xu K, Xu P. The Causal Association between Alcohol, Smoking, Coffee Consumption, and the Risk of Arthritis: A Meta-Analysis of Mendelian Randomization Studies. Nutrients 2023; 15:5009. [PMID: 38068867 PMCID: PMC10707754 DOI: 10.3390/nu15235009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/25/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
Objective: To evaluate the genetic causality between alcohol intake, smoking, coffee consumption, and arthritis. Methods: Mendelian randomization (MR) studies with alcohol, smoking, and coffee consumption behaviors as exposures, and osteoarthritis (OA) and rheumatoid arthritis (RA) as outcomes were retrieved from up to July 2023. Two researchers with relevant professional backgrounds independently assessed the quality and extracted data from the included studies. Meanwhile, we applied MR analyses of four lifestyle exposures and five arthritis outcomes (two for OA and three for RA) with gene-wide association study (GWAS) data that were different from the included studies, and the results were also included in the meta-analysis. Statistical analyses were performed using Stata 16.0 and R software version 4.3.1. Results: A total of 84 studies were assessed. Of these, 11 were selected for meta-analysis. As a whole, the included studies were considered to be at a low risk of bias and were of high quality. Results of the meta-analysis showed no significant genetic causality between alcohol intake and arthritis (odds ratio (OR): 1.02 (0.94-1.11)). Smoking and arthritis had a positive genetic causal association (OR: 1.44 (1.27-1.64)) with both OA (1.44 (1.22-1.71)) and RA (1.37 (1.26-1.50)). Coffee consumption and arthritis also had a positive genetic causal association (OR: 1.02 (1.01-1.03)). Results from the subgroup analysis showed a positive genetic causality between coffee consumption and both OA (OR: 1.02 (1.00-1.03)) and RA (OR: 1.56 (1.19-2.05)). Conclusion: There is positive genetic causality between smoking and coffee consumption and arthritis (OA and RA), while there is insufficient evidence for genetic causality between alcohol intake and arthritis.
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Affiliation(s)
- Junxiang Wang
- Department of Joint Surgery, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China; (J.W.); (B.Z.); (J.W.); (K.X.)
- The School of Medicine, Xi’an Jiaotong University, Xi’an 710049, China;
| | - Binfei Zhang
- Department of Joint Surgery, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China; (J.W.); (B.Z.); (J.W.); (K.X.)
| | - Leixuan Peng
- The School of Medicine, Xi’an Jiaotong University, Xi’an 710049, China;
| | - Jiachen Wang
- Department of Joint Surgery, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China; (J.W.); (B.Z.); (J.W.); (K.X.)
| | - Ke Xu
- Department of Joint Surgery, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China; (J.W.); (B.Z.); (J.W.); (K.X.)
| | - Peng Xu
- Department of Joint Surgery, Honghui Hospital, Xi’an Jiaotong University, Xi’an 710054, China; (J.W.); (B.Z.); (J.W.); (K.X.)
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16
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Luo X, Ruan Z, Liu L. Causal relationship between telomere length and epilepsy: A bidirectional Mendelian randomization study. Epilepsia Open 2023; 8:1432-1439. [PMID: 37593897 PMCID: PMC10690705 DOI: 10.1002/epi4.12817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 08/14/2023] [Indexed: 08/19/2023] Open
Abstract
OBJECTIVE Observational studies have suggested a link between telomere length (TL) and epilepsy, but the direction of the effect and whether it is causal or not is still being debated. The objective of this study was to investigate the causal relationship between TL and epilepsy using Mendelian randomization (MR) analysis. METHODS We performed a bidirectional two-sample MR analysis using pooled statistics from genome-wide association studies (GWAS) of TL and epilepsy. Additionally, we conducted a replication analysis using data from another GWAS study on epilepsy to validate our findings. The final results were analyzed using five MR methods, with the inverse-variance weighted (IVW) method as the primary outcome. We applied methods such as radial MR, MR pleiotropy residual and outlier test and MR Steiger filters to exclude outliers. Sensitivity analyses were also conducted to assess heterogeneity and pleiotropy. RESULTS Our analysis found no evidence of a causal relationship between epilepsy and TL (all p-values >0.05). The sensitivity analysis confirms the robustness of these results. SIGNIFICANCE In summary, our study contradicts existing observational reports by not finding any evidence to support a causal relationship between epilepsy and TL. Further research is necessary to determine the underlying mechanism behind the association observed in observational studies.
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Affiliation(s)
- Xinxin Luo
- Jiangxi Provincial People's Hospital and The First Affiliated Hospital of Nanchang Medical CollegeNanchangChina
| | - Zhichao Ruan
- Beijing University of Chinese MedicineBeijingChina
| | - Ling Liu
- Jiangxi Provincial People's Hospital and The First Affiliated Hospital of Nanchang Medical CollegeNanchangChina
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17
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Luo X, Ruan Z, Liu L. Causal relationship between depression and aging: a bidirectional two-sample Mendelian randomization study. Aging Clin Exp Res 2023; 35:3179-3187. [PMID: 37999829 DOI: 10.1007/s40520-023-02596-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 10/16/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND The causal relationship and the direction of the effect between depression and aging remain controversial. METHODS We used a bidirectional two-sample Mendelian randomization analysis to examine the relationship between depression and age proxy indicators. We obtained pooled statistics from genome-wide association studies (GWAS) on depression and the age proxy indicators. We employed five MR analysis methods to address potential biases and ensure robustness of our results, with the inverse variance weighted (IVW) method being the primary outcome. We also conducted outlier exclusion using Radial MR, MRPRESSO, and MR Steiger filters. Additionally, sensitivity analyses were performed to assess heterogeneity and pleiotropy. RESULTS Our MR analysis revealed that depression causally leads to shortened telomere length (β = - 0.014; P = 0.038), increased frailty index (β = 0.076; P = 0.000), and accelerated GrimAge (β = 0.249; P = 0.024). Furthermore, our findings showed that the frailty index (OR = 1.679; P = 0.001) was causally associated with an increased risk of depression. Additionally, we found that appendicular lean mass (OR = 0.929; P = 0.000) and left-hand grip strength (OR = 0.836; P = 0.014) were causally associated with a reduced risk of depression. Sensitivity analyses demonstrated the robustness of our findings. CONCLUSIONS Our study provides evidence that depression contributes to the accelerated aging process, resulting in decreased telomere length, increased frailty index, and accelerated GrimAge. Additionally, we found that the frailty index increases the risk of depression, while appendicular lean mass and left-handed grip strength reduce the risk of depression.
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Affiliation(s)
- Xinxin Luo
- Jiangxi Provincial People's Hospital and The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
| | - Zhichao Ruan
- Beijing University of Chinese Medicine, Beijing, China
| | - Ling Liu
- Jiangxi Provincial People's Hospital and The First Affiliated Hospital of Nanchang Medical College, Nanchang, China.
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18
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Yuan S, Li W, Ling Y, Huang X, Feng A, Tan S, He N, Li L, Li S, Xu A, Lyu J. Associations of screen-based sedentary activities with all cause dementia, Alzheimer's disease, vascular dementia: a longitudinal study based on 462,524 participants from the UK Biobank. BMC Public Health 2023; 23:2141. [PMID: 37919716 PMCID: PMC10621115 DOI: 10.1186/s12889-023-17050-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 10/23/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND Current drug treatments for dementia aren't effective. Studying gene-environment interactions can help develop personalized early intervention strategies for Alzheimer's disease (AD). However, no studies have examined the relationship between screen-based sedentary activities and genetic susceptibility to AD risk, and further understanding of the causal relationship is also crucial. METHODS This study included 462,524 participants from the UK Biobank with a follow-up of 13.6 years. Participants' screen-based sedentary activities time was categorized into three groups based on recorded time: ≥ 4 h/day, 2-3 h/day, and ≤ 1 h/day. Cox proportional risk models were used to analyze the association between computer use/TV viewing groups and the risk of all-cause dementia, AD and vascular dementia (VD). Generalized linear model (GLM) were used to examine the relationship between screen-based sedentary activities and brain structure. Bidirectional Mendelian randomization (MR) was used to validate the causal relationship between TV viewing and AD. RESULTS Compared to TV viewing ≤ 1 h/day, 1)TV viewing 2-3 h/day was correlated with a higher risk of all-cause dementia (HR = 1.09, 95% CI:1.01-1.18, P < 0.05), and TV viewing ≥ 4 h/day was associated with a higher risk of all-cause dementia (HR = 1.29, 95% CI: 1.19-1.40, P < 0.001), AD (HR = 1.25, 95% CI:1.1-1.42, P < 0.001), and VD (HR = 1.24, 95% CI: 1.04-1.49, P < 0.05); 2) TV viewing ≥ 4 h/day was correlated with a higher AD risk at intermediate (HR = 1.34, 95% CI: 1.03-1.75, P < 0.001) and high AD genetic risk score (AD-GRS) (HR = 2.18, 95% CI: 1.65-2.87, P < 0.001);3) TV viewing 2-3 h/day [β = (-94.8), 95% CI: (-37.9) -(-151.7), P < 0.01] and TV viewing ≥ 4 h/day [β = (-92.94), 95% CI: (-17.42) -(-168.46), P < 0.05] were correlated with a less hippocampus volume. In addition, a causal effect of TV viewing times was observed on AD analyzed using MR Egger (OR = 5.618, 95%CI:1.502-21.013, P < 0.05). CONCLUSIONS There was a causal effect between TV viewing time and AD analyzed using bidirectional MR, and more TV viewing time exposure was correlated with a higher AD risk. Therefore, it is recommended that people with intermediate and high AD-GRS should control their TV viewing time to be less than 4 h/ day or even less than 1 h/day.
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Affiliation(s)
- Shiqi Yuan
- Department of Neurology, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Wanyue Li
- Department of Rehabilitation, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Yitong Ling
- Department of Neurology, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Xiaxuan Huang
- Department of Neurology, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Aozi Feng
- Department of Clinical Research, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Shanyuan Tan
- Department of Neurology, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Ningxia He
- Department of Clinical Research, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Li Li
- Department of Clinical Research, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Shuna Li
- Department of Clinical Research, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China
| | - Anding Xu
- Department of Neurology, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China.
| | - Jun Lyu
- Department of Clinical Research, Guangdong Province, The First Affiliated Hospital of Jinan University, No.613, Huangpu Road West, Guangzhou, 510630, China.
- Guangdong Provincial Key Laboratory of Traditional Chinese Medicine Informatization, Guangzhou, 510630, Guangdong, China.
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Wang Q, Liu YN, Zhang H, Zhang ZQ, Huang XY, Xiao WZ. Causal Association Between Tea Consumption and Gout: A Mendelian Randomization Study. Curr Med Sci 2023; 43:947-954. [PMID: 37755636 DOI: 10.1007/s11596-023-2778-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 07/25/2023] [Indexed: 09/28/2023]
Abstract
OBJECTIVE Evidence from prospective studies on the consumption of tea and risk of gout is conflicting and limited. We aimed to investigate the potential causal effects of tea intake on gout using Mendelian randomization (MR). METHODS Genome-wide association studies in UK Biobank included 349 376 individuals and successfully discovered single-nucleotide polymorphisms linked to consumption of one cup of tea per day. Summary statistics from the Chronic Kidney Disease Genetics consortium included 13 179 cases and 750 634 controls for gout. Two-sample MR analyses were used to evaluate the relationship between tea consumption and gout risk. The inverse-variance weighted (IVW) method was used for primary analysis, and sensitivity analyses were also conducted to validate the potential causal effect. RESULTS In this study, the genetically predicted increase in tea consumption per cup was associated with a lower risk of gout in the IVW method (OR: 0.90; 95% CI: 0.82-0.98). Similar results were found in weighted median methods (OR: 0.88; 95% CI: 0.78-1.00), while no significant associations were found in MR-Egger (OR: 0.89; 95% CI: 0.71-1.11), weighted mode (OR: 0.80; 95% CI: 0.65-0.99), and simple mode (OR: 1.01; 95% CI: 0.75-1.36). In addition, no evidence of pleiotropy was detected by MR-Egger regression (P=0.95) or MR-PRESSO analysis (P=0.07). CONCLUSION This study provides evidence for the daily consumption of an extra cup of tea to reduce the risk of gout.
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Affiliation(s)
- Qi Wang
- Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China
| | - Yi-Ning Liu
- Human Phenome Institute, Zhangjiang Fudan International Innovation Centre, Fudan University, Shanghai, 200433, China
| | - Hui Zhang
- Human Phenome Institute, Zhangjiang Fudan International Innovation Centre, Fudan University, Shanghai, 200433, China
| | - Ze-Qun Zhang
- Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China
| | - Xiu-Ying Huang
- Department of Emergency, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China.
| | - Wen-Ze Xiao
- Department of Rheumatology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China.
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Luo X, Ruan Z, Liu L. The causal effect of serum 25-hydroxyvitamin D levels on epilepsy: A two-sample Mendelian randomization study. Epilepsia Open 2023; 8:912-917. [PMID: 37158995 PMCID: PMC10472413 DOI: 10.1002/epi4.12758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 05/01/2023] [Indexed: 05/10/2023] Open
Abstract
OBJECTIVE Observational studies have shown an association between 25-hydroxyvitamin D (25 (OH) D) and epilepsy, but it is unclear whether the association is causal. Therefore, we applied Mendelian randomization (MR) analysis to determine the causal relationship between serum 25 (OH) D levels and epilepsy. METHODS We conducted a two-sample Mendelian randomization (TSMR) study to investigate the association between serum 25 (OH) D levels and epilepsy using pooled statistics from genome-wide association studies (GWAS). Data for 25 (OH) D came from a GWAS comprising 417,580 participants, and data for epilepsy were obtained from the International League Against Epilepsy (ILAE) consortium. Five methods were used to analyze TSMR, including the inverse variance weighting method, MR Egger method, weighted median method, simple model, and weighted model. In the sensitivity analysis, MR Egger and MR PRESSO methods were used to test for pleiotropy, inverse variance weighting and MR Egger in Cochran's Q statistics were used to test for heterogeneity. RESULTS MR analyzed the relationship between 25 (OH) D and different types of epilepsy, and the results showed that a 1 standard deviation increase in natural log-transformed serum 25 (OH) D levels was associated with reduced risk for juvenile absence epilepsy (IVW OR = 0.985; 95% confidence interval [CI]: 0.971-0.999; P-value = 0.038). There was no apparent heterogeneity and horizontal gene pleiotropy. SIGNIFICANCE Higher serum levels of 25 (OH) D were a protective factor for adolescent absence epilepsy, but had no effect on other types of epilepsy.
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Affiliation(s)
- Xinxin Luo
- Jiangxi Provincial People's Hospital & The First Affiliated Hospital of Nanchang Medical CollegeNanchangChina
| | - Zhichao Ruan
- Beijing University of Chinese MedicineBeijingChina
| | - Ling Liu
- Jiangxi Provincial People's Hospital & The First Affiliated Hospital of Nanchang Medical CollegeNanchangChina
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21
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Yan H, Jin X, Zhang C, Zhu C, He Y, Du X, Feng G. Associations between diet and incidence risk of lung cancer: A Mendelian randomization study. Front Nutr 2023; 10:1149317. [PMID: 37063327 PMCID: PMC10102585 DOI: 10.3389/fnut.2023.1149317] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 03/15/2023] [Indexed: 04/03/2023] Open
Abstract
BackgroundObservational studies have revealed associations between diet and lung cancer. However, it is unclear whether the association is disturbed by confounding factors. We used a two-sample Mendelian randomization (MR) method to characterize the associations between diet and the lung cancer risk (including 3 subtypes: lung adenocarcinoma (LA), squamous cell lung carcinoma (SqCLC), and small cell lung cancer (SCLC)).Materials and methodsData on 20 diets were screened from the UK Biobank. Lung cancer data came from a large meta-analysis of 85,716 individuals. The inverse-variance weighted method was used as the main analysis. Sensitivity analysis was also used to explain the different multiplicity patterns of the final model.ResultsOur results showed significant evidence that 3 diets were associated with lung cancer [odds ratio (OR): 0.271, 95% confidence interval (CI): 0.150–0.488, p = 1.46 × 10−4, dried fruit; OR: 3.010, 95% CI: 1.608–5.632, p = 5.70 × 10−4, beer] and SqCLC (OR: 0.135, 95% CI: 0.062–0.293, p = 2.33 × 10−5, dried fruit; OR: 0.485, 95% CI: 0.328–0.717, p = 2.9 × 10−4, cheese). There were also suggestive correlations between 5 dietary intakes and lung cancer (OR: 0.441, 95% CI: 0.250–0.778, p = 0.008, cereal; OR: 2.267, 95% CI: 1.126–4.564, p = 0.022, beef), LA (OR: 0.494, 95% CI: 0.285–0.858, p = 0.012, dried fruit; OR: 3.536, 95% CI: 1.546–8.085, p = 0.003, beer) and SCLC (OR: 0.006, 95% CI: 0.000–0.222, p = 0.039, non-oily fish; OR: 0.239, 95% CI: 0.086–0.664, p = 0.006, dried fruit). No other association between diet and lung cancer was observed.ConclusionOur study preliminary found that cheese, dried fruit, and beer intake were significantly associated with the risk of lung cancer or its subtypes, while cereal, beef, and non-oily fish intake were suggestively associated with the risk of lung cancer or its subtypes. Well-designed prospective studies are still needed to confirm our findings in the future.
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Affiliation(s)
- Haihao Yan
- Department of Respiratory Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiao Jin
- Department of Respiratory Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Changwen Zhang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Changjun Zhu
- Department of Respiratory Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yucong He
- Department of Respiratory Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xingran Du
- Department of Infectious Disease, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Xingran Du,
| | - Ganzhu Feng
- Department of Respiratory Medicine, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
- Ganzhu Feng,
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22
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Zeng L, Lv H, Wang X, Xue R, Zhou C, Liu X, Yu H. Causal effects of fatty acids on depression: Mendelian randomization study. Front Nutr 2022; 9:1010476. [PMID: 36562041 PMCID: PMC9763462 DOI: 10.3389/fnut.2022.1010476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 11/18/2022] [Indexed: 12/12/2022] Open
Abstract
Objectives Fatty acids (FA) are widely believed to play a role in the pathophysiology of depression. However, the causal relationships between FA and depression remain elusive and warrant further research. We aimed to investigate the potential causal relationship between FA [saturated fatty acids (SFA), mono-unsaturated fatty acids (MUFA), and polyunsaturated fatty acids (PUFA)] and the risk of depression using Mendelian randomization (MR) analysis. Methods We conducted a two-sample MR analysis using large-scale European-based genome-wide association studies (GWASs) summary data related to depression (n = 500,199 individuals) and FA [saturated fatty acids (SFA), mono-unsaturated fatty acids (MUFA), and polyunsaturated fatty acids (PUFA)] levels. MR analysis was performed using the Wald ratio and inverse variance-weighted (IVW) methods, and sensitivity analysis was conducted by the simple mode, weighted mode, weighted median method, and MR-Egger method. Results We found the causal effects for the levels of oleic acid (OA; OR = 1.07, p = 5.72 × 10-4), adrenic acid (OR = 0.74, p = 1.01 × 10-3), α-linolenic acid (ALA; OR = 2.52, p = 1.01 × 10-3), eicosapentaenoic acid (EPA; OR = 0.84, p = 3.11 × 10-3) on depression risk, after Bonferroni correction. The sensitivity analyses indicated similar trends. No causal effect between the levels of SFA and depression risk was observed. Conclusion Our study suggests that adrenic acid and EPA are protective against the risk of depression, while OA and ALA are potential risk factors for depression. Nonetheless, the underlying mechanisms that mediate the association between these FAs and depression risk should be investigated in further experiments.
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Affiliation(s)
- Lingsi Zeng
- Department of Psychiatry, Jining Medical University, Jining, Shandong, China
| | - Honggang Lv
- Department of Psychiatry, Jining Medical University, Jining, Shandong, China
| | - Xubo Wang
- Department of Psychiatry, Shandong Daizhuang Hospital, Jining, Shandong, China
| | - Ranran Xue
- Department of Psychiatry, Shandong Daizhuang Hospital, Jining, Shandong, China
| | - Cong Zhou
- Department of Psychiatry, Jining Medical University, Jining, Shandong, China
| | - Xia Liu
- Department of Sleep Medicine, Shandong Daizhuang Hospital, Jining, Shandong, China,Xia Liu,
| | - Hao Yu
- Department of Psychiatry, Jining Medical University, Jining, Shandong, China,*Correspondence: Hao Yu,
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Larsson SC, Spyrou N, Mantzoros CS. Body fatness associations with cancer: evidence from recent epidemiological studies and future directions. Metabolism 2022; 137:155326. [PMID: 36191637 DOI: 10.1016/j.metabol.2022.155326] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/27/2022] [Accepted: 09/27/2022] [Indexed: 12/12/2022]
Abstract
This narrative review highlights current evidence linking greater body fatness to risk of various cancers, with focus on evidence from recent large cohort studies and pooled analyses of cohort studies as well as Mendelian randomization studies (which utilized genetic variants associated with body mass index to debrief the causal effect of higher body fatness on cancer risk). This review also provides insights into the biological mechanisms underpinning the associations. Data from both observational and Mendelian randomization studies support the associations of higher body mass index with increased risk of many cancers with the strongest evidence for digestive system cancers, including esophageal, stomach, colorectal, liver, gallbladder, and pancreatic cancer, as well as kidney, endometrial, and ovarian (weak association) cancer. Evidence from observational studies suggests that greater body fatness has contrasting effects on breast cancer risk depending on menopausal status and on prostate cancer risk depending on disease stage. Experimental and Mendelian randomization studies indicate that adiponectin, insulin, and sex hormone pathways play an important role in mediating the link between body fatness and cancer risk. The possible role of specific factors and pathways, such as other adipocytokines and hormones and the gut microbiome in mediating the associations between greater body fatness and cancer risk is yet uncertain and needs investigation in future studies. With rising prevalence of overweight and obesity worldwide, the proportion of cancer caused by excess body fatness is expected to increase. There is thus an urgent need to identify efficient ways at the individual and societal level to improve diet and physical activity patterns to reduce the burden of obesity and accompanying comorbidities, including cancer.
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Affiliation(s)
- Susanna C Larsson
- Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Unit of Medical Epidemiology, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.
| | - Nikolaos Spyrou
- The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Christos S Mantzoros
- Department of Medicine, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA, USA; Section of Endocrinology, VA Boston Healthcare System, Harvard Medical School, Boston, MA, USA
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24
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Arsenault BJ. From the garden to the clinic: how Mendelian randomization is shaping up atherosclerotic cardiovascular disease prevention strategies. Eur Heart J 2022; 43:4447-4449. [PMID: 35869924 DOI: 10.1093/eurheartj/ehac394] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Benoit J Arsenault
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec - Université Laval Y-3106, Pavillon Marguerite D'Youville, 2725 chemin Ste-Foy, Québec, QC G1V 4G5, Canada.,Department of Medicine, Faculty of Medicine, Université Laval, 2325 rue de l'Université, Québec, QC G1V 0A6, Canada
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25
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Bennett DA, Du H. An Overview of Methods and Exemplars of the Use of Mendelian Randomisation in Nutritional Research. Nutrients 2022; 14:nu14163408. [PMID: 36014914 PMCID: PMC9412324 DOI: 10.3390/nu14163408] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/12/2022] [Accepted: 08/15/2022] [Indexed: 12/09/2022] Open
Abstract
Objectives: It is crucial to elucidate the causal relevance of nutritional exposures (such as dietary patterns, food intake, macronutrients intake, circulating micronutrients), or biomarkers in non-communicable diseases (NCDs) in order to find effective strategies for NCD prevention. Classical observational studies have found evidence of associations between nutritional exposures and NCD development, but such studies are prone to confounding and other biases. This has direct relevance for translation research, as using unreliable evidence can lead to the failure of trials of nutritional interventions. Facilitated by the availability of large-scale genetic data, Mendelian randomization studies are increasingly used to ascertain the causal relevance of nutritional exposures and biomarkers for many NCDs. Methods: A narrative overview was conducted in order to demonstrate and describe the utility of Mendelian randomization studies, for individuals with little prior knowledge engaged in nutritional epidemiological research. Results: We provide an overview, rationale and basic description of the methods, as well as strengths and limitations of Mendelian randomization studies. We give selected examples from the contemporary nutritional literature where Mendelian randomization has provided useful evidence on the potential causal relevance of nutritional exposures. Conclusions: The selected exemplars demonstrate the importance of well-conducted Mendelian randomization studies as a robust tool to prioritize nutritional exposures for further investigation.
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Affiliation(s)
- Derrick A. Bennett
- Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit, University of Oxford, Oxford OX1 3QR, UK
- Correspondence: ; Tel.: +44-1865-743949; Fax: +44-1865-743985
| | - Huaidong Du
- Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit, University of Oxford, Oxford OX1 3QR, UK
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Ma M, Zhi H, Yang S, Yu EYW, Wang L. Body Mass Index and the Risk of Atrial Fibrillation: A Mendelian Randomization Study. Nutrients 2022; 14:1878. [PMID: 35565843 PMCID: PMC9101688 DOI: 10.3390/nu14091878] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 02/04/2023] Open
Abstract
Although observational studies have shown positive associations between body mass index (BMI) and the risk of atrial fibrillation (AF), the causal relationship is still uncertain owing to the susceptibility to confounding and reverse causation. This study aimed to examine the potential causality of BMI on AF by conducting a two-sample Mendelian randomization (TSMR) study. METHODS The independent genetic variants associated with BMI (n = 303) at the genome-wide significant level were derived as instrumental variables (IV) from the Genetic Investigation of Anthropometric Traits (GIANT) consortium consisting of 681,275 individuals of European ancestry. We then derived the outcome data from a GWAS meta-analysis comprised of 60,620 cases and 970,216 controls of European ancestry. The TSMR analyses were performed in five methods, namely inverse variance weighted (IVW) method, MR-Egger regression, the weighted median estimator (WME), the generalized summary data-based Mendelian randomization (GSMR), and the robust adjusted profile score (RAPS), to investigate whether BMI was causally associated with the risk of AF. RESULTS We found a genetically determined 1-standard deviation (SD) increment of BMI causally increased a 42.5% risk of AF (OR = 1.425; 95% CI, 1.346 to 1.509) based on the IVW method, which was consistent with the results of MR-Egger regression, WME, GSMR, as well as RAPS. The Mendelian randomization assumptions did not seem to be violated. CONCLUSION This study provides evidence that higher BMI causally increased the risk of AF, suggesting control of BMI and obesity for prevention of AF.
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Affiliation(s)
- Mi Ma
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Department of Epidemiology & Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (M.M.); (S.Y.); (E.Y.-W.Y.)
| | - Hong Zhi
- Department of Cardiology, Zhong Da Hospital, Southeast University, Nanjing 210009, China;
| | - Shengyi Yang
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Department of Epidemiology & Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (M.M.); (S.Y.); (E.Y.-W.Y.)
| | - Evan Yi-Wen Yu
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Department of Epidemiology & Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (M.M.); (S.Y.); (E.Y.-W.Y.)
- CAPHRI Care and Public Health Research Institute, School of Nutrition and Translational Research in Metabolism, Maastricht University, 6229 Maastricht, The Netherlands
| | - Lina Wang
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Department of Epidemiology & Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (M.M.); (S.Y.); (E.Y.-W.Y.)
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27
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Chen S, Zheng C, Chen T, Huang D, Pan Y, Chen S. Relationship Between Plasma Vitamin C and COVID-19 Susceptibility and Severity: A Two-Sample Mendelian Randomization Study. Front Med (Lausanne) 2022; 9:844228. [PMID: 35355592 PMCID: PMC8959865 DOI: 10.3389/fmed.2022.844228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/04/2022] [Indexed: 01/08/2023] Open
Abstract
Background Considering the antioxidant function of Vitamin C, also called ascorbic acid, it is widely used against viral infections such as coronavirus disease (COVID-19) based on in vitro, observational, and ecological studies. Many confounding factors that can affect Vitamin C levels. Thus, the association described to date may not be causal. To determine the causal relationship between genetically predicted plasma Vitamin C and COVID-19 susceptibility and severity, we performed two-sample Mendelian randomization (MR) based on large samples. Methods The summary-level data for Vitamin C was obtained from a GWAS meta-analysis, which included 52,018 individuals from four studies of European ancestry. Data for COVID-19 HGI results were obtained from the meta-analysis of 35 GWASs with more than 1,000,000 subjects of European ancestry, including 32,494 cases with COVID-19 susceptibility and 1,316,207 controls, 9,986 cases with COVID-19 hospitalization and 1,877,672 controls, and 5,101 cases with COVID-19 severe disease and 1,383,241 controls. Mendelian randomization (MR) analysis was conducted to examine the effect of selected single nucleotide polymorphisms and COVID-19 susceptibility, hospitalization, disease severity. Several sensitivity analyses were performed with inverse-variance weighted (random-effect model), inverse variance weighted (fixed-effect model), weighted median, and maximum likelihood methods for estimating the causal effects. Results In this MR study, genetic predisposition to the levels of plasma Vitamin C was not associated with COVID-19 susceptibility (OR: 0.99, 95% CI: 0.84–1.17, P = 0.91), hospitalization (OR: 1.10, 95% CI: 0.71–1.71, P = 0.67) and severity (OR: 0.83, 95% CI: 0.43–1.59, P = 0.58). The association was consistent in complementary analyses. No potential heterogeneities and directional pleiotropies were observed for the analysis results. Conclusion According to our study, no correlation was observed between plasma Vitamin C levels and COVID-19 susceptibility and severity. Further studies in different ethnics are necessary to explore the potential role and mechanisms of circulating serum Vitamin C levels on COVID-19.
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Affiliation(s)
- Song Chen
- Department of Orthopedics, Fuzhou Second Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Changhua Zheng
- Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Tianlai Chen
- The Third Department of Clinical Medicine, Fujian Medical University, Fuzhou, China
| | - Dianhua Huang
- Department of Orthopedics, Fuzhou Second Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Yuancheng Pan
- Department of Orthopedics, Fuzhou Second Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Shunyou Chen
- Department of Orthopedics, Fuzhou Second Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
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Cronin O, Lanham-New SA, Corfe BM, Gregson CL, Darling AL, Ahmadi KR, Gibson PS, Tobias JH, Ward KA, Traka MH, Rossi M, Williams C, Harvey NC, Cooper C, Whelan K, Uitterlinden AG, O'Toole PW, Ohlsson C, Compston JE, Ralston SH. Role of the Microbiome in Regulating Bone Metabolism and Susceptibility to Osteoporosis. Calcif Tissue Int 2022; 110:273-284. [PMID: 34870723 PMCID: PMC8860778 DOI: 10.1007/s00223-021-00924-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/04/2021] [Indexed: 12/15/2022]
Abstract
The human microbiota functions at the interface between diet, medication-use, lifestyle, host immune development and health. It is therefore closely aligned with many of the recognised modifiable factors that influence bone mass accrual in the young, and bone maintenance and skeletal decline in older populations. While understanding of the relationship between micro-organisms and bone health is still in its infancy, two decades of broader microbiome research and discovery supports a role of the human gut microbiome in the regulation of bone metabolism and pathogenesis of osteoporosis as well as its prevention and treatment. Pre-clinical research has demonstrated biological interactions between the microbiome and bone metabolism. Furthermore, observational studies and randomized clinical trials have indicated that therapeutic manipulation of the microbiota by oral administration of probiotics may influence bone turnover and prevent bone loss in humans. In this paper, we summarize the content, discussion and conclusions of a workshop held by the Osteoporosis and Bone Research Academy of the Royal Osteoporosis Society in October, 2020. We provide a detailed review of the literature examining the relationship between the microbiota and bone health in animal models and in humans, as well as formulating the agenda for key research priorities required to advance this field. We also underscore the potential pitfalls in this research field that should be avoided and provide methodological recommendations to facilitate bridging the gap from promising concept to a potential cause and intervention target for osteoporosis.
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Affiliation(s)
- Owen Cronin
- Rheumatic Diseases Unit, Western General Hospital, Crewe Road South, Edinburgh, EH4 2XU, UK
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK
| | - Susan A Lanham-New
- Nutrition, Food and Exercise Sciences Department, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Bernard M Corfe
- Population Health Sciences Institute, Human Nutrition Research Centre, Faculty of Medical Sciences, Newcastle University, Newcastle, NE2 4HH, UK
| | - Celia L Gregson
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Andrea L Darling
- Nutrition, Food and Exercise Sciences Department, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Kourosh R Ahmadi
- Nutrition, Food and Exercise Sciences Department, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, GU2 7XH, UK
| | - Philippa S Gibson
- Department of Nutritional Sciences, King's College London, London, UK
| | - Jon H Tobias
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Kate A Ward
- MRC Lifecourse Epidemiology Centre, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Maria H Traka
- Food Databanks National Capability, Quadram Institute Bioscience, Norwich Research Park, Norwich, NR4 7UQ, UK
| | - Megan Rossi
- Department of Nutritional Sciences, King's College London, London, UK
| | - Claire Williams
- Molecular Gastroenterology Research Group, Academic Unit of Surgical Oncology, Department of Oncology and Metabolism, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK
| | - Nicholas C Harvey
- MRC Lifecourse Epidemiology Centre, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Cyrus Cooper
- MRC Lifecourse Epidemiology Centre, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
- NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Kevin Whelan
- Department of Nutritional Sciences, King's College London, London, UK
| | - André G Uitterlinden
- Department of Internal Medicine, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Paul W O'Toole
- School of Microbiology and APC Microbiome Ireland, University College Cork, Room 447, Food Science Building, Cork, T12 K8AF, Ireland
| | - Claes Ohlsson
- Sahlgrenska Osteoporosis Centre, Center for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | | | - Stuart H Ralston
- Rheumatic Diseases Unit, Western General Hospital, Crewe Road South, Edinburgh, EH4 2XU, UK.
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, UK.
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Sobczyk MK, Gaunt TR. The Effect of Circulating Zinc, Selenium, Copper and Vitamin K 1 on COVID-19 Outcomes: A Mendelian Randomization Study. Nutrients 2022; 14:233. [PMID: 35057415 PMCID: PMC8780111 DOI: 10.3390/nu14020233] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 12/22/2022] Open
Abstract
Background & Aims: Previous results from observational, interventional studies and in vitro experiments suggest that certain micronutrients possess anti-viral and immunomodulatory activities. In particular, it has been hypothesized that zinc, selenium, copper and vitamin K1 have strong potential for prophylaxis and treatment of COVID-19. We aimed to test whether genetically predicted Zn, Se, Cu or vitamin K1 levels have a causal effect on COVID-19 related outcomes, including risk of infection, hospitalization and critical illness. Methods: We employed a two-sample Mendelian Randomization (MR) analysis. Our genetic variants derived from European-ancestry GWAS reflected circulating levels of Zn, Cu, Se in red blood cells as well as Se and vitamin K1 in serum/plasma. For the COVID-19 outcome GWAS, we used infection, hospitalization or critical illness. Our inverse-variance weighted (IVW) MR analysis was complemented by sensitivity analyses including a more liberal selection of variants at a genome-wide sub-significant threshold, MR-Egger and weighted median/mode tests. Results: Circulating micronutrient levels show limited evidence of association with COVID-19 infection, with the odds ratio [OR] ranging from 0.97 (95% CI: 0.87-1.08, p-value = 0.55) for zinc to 1.07 (95% CI: 1.00-1.14, p-value = 0.06)-i.e., no beneficial effect for copper was observed per 1 SD increase in exposure. Similarly minimal evidence was obtained for the hospitalization and critical illness outcomes with OR from 0.98 (95% CI: 0.87-1.09, p-value = 0.66) for vitamin K1 to 1.07 (95% CI: 0.88-1.29, p-value = 0.49) for copper, and from 0.93 (95% CI: 0.72-1.19, p-value = 0.55) for vitamin K1 to 1.21 (95% CI: 0.79-1.86, p-value = 0.39) for zinc, respectively. Conclusions: This study does not provide evidence that supplementation with zinc, selenium, copper or vitamin K1 can prevent SARS-CoV-2 infection, critical illness or hospitalization for COVID-19.
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Affiliation(s)
- Maria K. Sobczyk
- MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol BS8 2BN, UK;
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Mendelian Randomization Study of Causal Relationship between Omega-3 Fatty Acids and Risk of Lung Cancer. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2786567. [PMID: 35686230 PMCID: PMC9173898 DOI: 10.1155/2022/2786567] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 05/03/2022] [Indexed: 12/24/2022]
Abstract
Objective Evidence suggests that omega-3 fatty acid intake exerts a protective effect on lung cancer, but its causal association with risk of lung cancer remains uncertain. This study attempts to clarify the causal effect of omega-3 fatty acids on lung cancer utilizing genome-wide association study (GWAS) data with Mendelian randomization (MR) approach. Methods This study acquired omega-3 fatty acid data from the UK Biobank and data of lung cancer patients from the Consortium and International Lung Cancer Consortium (ILCCO). Single-nucleotide polymorphisms (SNPs) associated with omega-3 fatty acids were screened as instrumental variables (IVs) in line with the criteria of p < 5E - 8, linkage disequilibrium R 2 > 0.001 and distance < 10000 kb. Through inverse variance weighted (IVW), MR-Egger, weighted median, simple mode, and weighted mode, causal association between omega-3 fatty acids and risk of lung cancer was evaluated. Cochran's Q test was applied for a heterogeneity test. The pleiotropy and horizontal pleiotropy among IVs were evaluated via MR-Egger regression intercept analysis. Results Totally, 42 SNPs associated with omega-3 fatty acids were identified as IVs. According to the results of IVW (OR (95% CI): 0.899 (0.817, 0.990), p = 0.03), MR-Egger (OR (95% CI): 0.856 (0.750, 0.977), p = 0.026), weighted median (OR (95% CI): 0.899 (0.817, 0.990), p = 0.001), simple mode (OR (95% CI): 0.901 (-0.678, 1.199), p = 0.478), and weighted mode (OR (95% CI): 0.859 (0.782, 0.944), p = 0.003), omega-3 fatty acids showed a causal association with low risk of lung cancer. No genetic pleiotropy or horizontal pleiotropy was found according to MR-Egger regression intercept analysis. Conclusion Our findings provide sufficient evidence that omega-3 fatty acids are causal protective factors of lung cancer. Despite this, further work is required for elucidating the potential mechanisms.
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Zhang Y, Xiong Y, Shen S, Yang J, Wang W, Wu T, Chen L, Yu Q, Zuo H, Wang X, Lei X. Causal Association Between Tea Consumption and Kidney Function: A Mendelian Randomization Study. Front Nutr 2022; 9:801591. [PMID: 35425787 PMCID: PMC9002236 DOI: 10.3389/fnut.2022.801591] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/07/2022] [Indexed: 12/23/2022] Open
Abstract
Background Causal research concerning the consumption of tea and the risk of chronic kidney disease (CKD) is limited. This study identified the potential causal effects of tea intake on CKD, the estimated glomerular filtration rate (eGFR), and albuminuria. Methods Genome-wide association studies (GWASs) from UK Biobank were able to identify single-nucleotide polymorphisms (SNPs) associated with an extra cup of tea each day. The summary statistics for the kidney function from the CKDGen consortium include 11,765 participants (12,385 cases of CKD) and 54,116 participants for the urinary albumin-to-creatinine ratio who were mostly of European descent. A two-sample Mendelian randomization (MR) analysis was performed to test the relationship between the selected SNPs and the risk of CKD. Results A total of 2,672 SNPs associated with tea consumption (p < 5 × 10-8) were found, 45 of which were independent and usable in CKDGen. Drinking more cups of tea per day indicates a protective effect for CKD G3-G5 [odds ratio (OR) = 0.803; p = 0.004] and increases eGFR (β = 0.019 log ml/min/1.73 m2 per cup per day; p = 2.21 × 10-5). Excluding two SNPs responsible for directional heterogeneity (Cochran Q p = 0.02), a high consumption of tea was also negatively correlated with a lower risk of albuminuria (OR = 0.758; p = 0.002). Conclusion From the perspective of genes, causal relationships exist between daily extra cup of tea and the reduced risk of CKD and albuminuria and increased eGFR.
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Affiliation(s)
- Yangchang Zhang
- School of Public Health and Management, Chongqing Medical University, Chongqing, China.,Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China.,The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China.,Research Center for Public Health Security, Chongqing Medical University, Chongqing, China
| | - Yang Xiong
- The West China Hospital, Sichuan University, Chengdu, China
| | - Shisi Shen
- The First School of Clinical Medicine, Chongqing Medical University, Chongqing, China
| | - Jialu Yang
- School of Public Health and Management, Chongqing Medical University, Chongqing, China.,Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China.,The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Wei Wang
- School of Public Health and Management, Chongqing Medical University, Chongqing, China.,Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China.,The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Tingting Wu
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing, China
| | - Li Chen
- School of Public Health & Institute of Child and Adolescent Health, Peking University, Beijing, China
| | - Qiuhua Yu
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Hangjia Zuo
- The First School of Clinical Medicine, Chongqing Medical University, Chongqing, China
| | - Xu Wang
- School of Public Health and Management, Chongqing Medical University, Chongqing, China.,Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China.,The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Xun Lei
- School of Public Health and Management, Chongqing Medical University, Chongqing, China.,Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China.,The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China.,Research Center for Public Health Security, Chongqing Medical University, Chongqing, China
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Chen S, Chen T, Chen Y, Huang D, Pan Y, Chen S. Causal Association Between Tea Consumption and Bone Health: A Mendelian Randomization Study. Front Nutr 2022; 9:872451. [PMID: 35558741 PMCID: PMC9087269 DOI: 10.3389/fnut.2022.872451] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 04/04/2022] [Indexed: 11/13/2022] Open
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.
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Affiliation(s)
- Song Chen
- Department of Orthopedics, Fuzhou Second Hospital, Fuzhou, China
| | - Tianlai Chen
- The Third Department of Clinical Medicine, Fujian Medical University, Fuzhou, China
| | - Yibin Chen
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Dianhua Huang
- Department of Orthopedics, Fuzhou Second Hospital, Fuzhou, China
| | - Yuancheng Pan
- Department of Orthopedics, Fuzhou Second Hospital, Fuzhou, China
| | - Shunyou Chen
- Department of Orthopedics, Fuzhou Second Hospital, Fuzhou, China
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Kirwan R, Isanejad M, Davies IG, Mazidi M. Genetically Determined Serum 25-Hydroxyvitamin D Is Associated with Total, Trunk, and Arm Fat-Free Mass: A Mendelian Randomization Study. J Nutr Health Aging 2022; 26:46-51. [PMID: 35067702 DOI: 10.1007/s12603-021-1696-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE Low serum vitamin D status has been associated with reduced muscle mass in observational studies although the relationship is controversial and a causal association cannot be determined from such observations. Two-sample Mendelian randomization (MR) was applied to assess the association between serum vitamin D (25(OH)D) and total, trunk, arm and leg fat-free mass (FFM). METHODS MR was implemented using summary-level data from the largest genome-wide association studies (GWAS) on vitamin D (n=73,699) and total, trunk, arm and leg FFM. Inverse variance weighted method (IVW) was used to estimate the causal estimates. Weighted median (WM)-based method, and MR-Egger, leave-one-out were applied as sensitivity analysis. RESULTS Genetically higher serum 25(OH)D levels had a positive effect on total (IVW = Beta: 0.042, p = 0.038), trunk (IVW = Beta: 0.045, p = 0.023) and arm (right arm IVW = Beta: 0.044, p = 0.002; left arm IVW = Beta: 0.05, p = 0.005) FFM. However, the association with leg FFM was not significant (right leg IVW = Beta: 0.03, p = 0.238; left leg IVW = Beta: 0.039, p = 0.100). The likelihood of heterogeneity and pleiotropy was determined to be low (statistically non-significant), and the observed associations were not driven by single SNPs. Furthermore, MR pleiotropy residual sum and outlier test did not highlight any outliers. CONCLUSIONS Our results illustrate the potentially causal, positive effect of serum 25(OH)D concentration on total, trunk and upper body appendicular fat-free mass.
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Affiliation(s)
- R Kirwan
- Richard Kirwan, School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, UK. https://orcid.org/0000-0003-4645-0077
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Coffee Consumption and Cardiovascular Diseases: A Mendelian Randomization Study. Nutrients 2021; 13:nu13072218. [PMID: 34203356 PMCID: PMC8308456 DOI: 10.3390/nu13072218] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/22/2021] [Accepted: 06/26/2021] [Indexed: 12/16/2022] Open
Abstract
Coffee consumption has been linked to a lower risk of cardiovascular disease in observational studies, but whether the associations are causal is not known. We conducted a Mendelian randomization investigation to assess the potential causal role of coffee consumption in cardiovascular disease. Twelve independent genetic variants were used to proxy coffee consumption. Summary-level data for the relations between the 12 genetic variants and cardiovascular diseases were taken from the UK Biobank with up to 35,979 cases and the FinnGen consortium with up to 17,325 cases. Genetic predisposition to higher coffee consumption was not associated with any of the 15 studied cardiovascular outcomes in univariable MR analysis. The odds ratio per 50% increase in genetically predicted coffee consumption ranged from 0.97 (95% confidence interval (CI), 0.63, 1.50) for intracerebral hemorrhage to 1.26 (95% CI, 1.00, 1.58) for deep vein thrombosis in the UK Biobank and from 0.86 (95% CI, 0.50, 1.49) for subarachnoid hemorrhage to 1.34 (95% CI, 0.81, 2.22) for intracerebral hemorrhage in FinnGen. The null findings remained in multivariable Mendelian randomization analyses adjusted for genetically predicted body mass index and smoking initiation, except for a suggestive positive association for intracerebral hemorrhage (odds ratio 1.91; 95% CI, 1.03, 3.54) in FinnGen. This Mendelian randomization study showed limited evidence that coffee consumption affects the risk of developing cardiovascular disease, suggesting that previous observational studies may have been confounded.
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Zhang Y, Fan J, Chen L, Xiong Y, Wu T, Shen S, Wang X, Meng X, Lu Y, Lei X. Causal Association of Coffee Consumption and Total, Knee, Hip and Self-Reported Osteoarthritis: A Mendelian Randomization Study. Front Endocrinol (Lausanne) 2021; 12:768529. [PMID: 34858340 PMCID: PMC8631393 DOI: 10.3389/fendo.2021.768529] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/15/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The causal association between coffee consumption and the risk of OA is limited. This study was conducted to identify the potential causal effects of coffee consumption on total, knee, hip, and self-reported OA. METHODS Genome-wide association studies (GWAS) of OA were derived from the UK Biobank, comprising 50,508 participants of European ancestry (10,083 with cases and 40,425 controls), and genetic data for specific diagnosed knee OA (4462 cases and 17,885 controls), hip OA (12,625 cases and 50,898 controls), and self-reported OA (12,658 cases and 50,898 controls). Primary and secondary genetic instruments (11 SNPs and 8 SNPs) were selected as instrumental variants from GWAS among 375,833 and 91,462 participants. Two-sample Mendelian randomization (MR) analyses were performed to test the effects of the selected single nucleotide polymorphisms (SNPs) and the OA risk. The causal effects were primarily estimated using weighted median and inverse-variance weighted method with several sensitivity analyses. RESULTS The MR analyses suggested that genetically predicted 1% increase of coffee consumption was associated with an increased risk of overall OA (OR:1.009, 95% CI:1.003-1.016), knee OA (OR:1.023, 95% CI:1.009-1.038), self-reported OA (OR:1.007, 95% CI:1.003-1.011), but not hip OA (OR: 1.012, 95%CI:0.999-1.024) using primary genetic instruments. Similar results were found when using secondary genetic instruments that genetically predicted coffee consumption (cups/day). Additionally, the sensitivity analyses for leave-one-out methods supported a robust association between exposure traits and OA. CONCLUSION Our findings indicate that genetically predicted coffee consumption exerts a causal effect on total, knee, and self-reported OA risk, but not at the hip. Further research is required to unravel the role of coffee consumption in OA prevention.
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Affiliation(s)
- Yangchang Zhang
- School of Public Health and Management, Chongqing Medical University, Chongqing, China
- Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China
- The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Jun Fan
- Financial Department Chongqing Medical University, Chongqing, China
| | - Li Chen
- School of Public Health & Institute of Child and Adolescent Health, Peking University, Beijing, China
| | - Yang Xiong
- The West China Hospital, Sichuan University, Chengdu, China
| | - Tingting Wu
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing, China
| | - Shisi Shen
- The First School of Clinical Medicine, Chongqing Medical University, Chongqing, China
| | - Xu Wang
- School of Public Health and Management, Chongqing Medical University, Chongqing, China
- Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China
- The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Xuchen Meng
- The First School of Clinical Medicine, Chongqing Medical University, Chongqing, China
| | - Yanjun Lu
- The First School of Clinical Medicine, Chongqing Medical University, Chongqing, China
| | - Xun Lei
- School of Public Health and Management, Chongqing Medical University, Chongqing, China
- Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China
- The Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
- *Correspondence: Xun Lei,
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