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Tan Y, Yan Z, Yin J, Cao J, Xie B, Zhang F, Zhang W, Xiong W. Elucidating the role of genetically determined metabolites in Diabetic Retinopathy: insights from a mendelian randomization analysis. Acta Diabetol 2024:10.1007/s00592-024-02345-7. [PMID: 39090426 DOI: 10.1007/s00592-024-02345-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 07/06/2024] [Indexed: 08/04/2024]
Abstract
AIMS Diabetic retinopathy (DR) results from complex genetic and metabolic interactions. Unraveling the links between blood metabolites and DR can advance risk prediction and therapy. METHODS Leveraging Mendelian Randomization (MR) and Linkage Disequilibrium Score Regression (LDSC), we analyzed 10,413 DR cases and 308,633 controls. Data was sourced from the Metabolomics GWAS server and the FinnGen project. RESULTS Our research conducted a comprehensive MR analysis across 486 serum metabolites to investigate their causal role in DR. After stringent selection and validation of instrumental variables, we focused on 480 metabolites for analysis. Our findings revealed 38 metabolites potentially causally associated with DR. Specifically, 4-androsten-3beta,17beta-diol disulfate 2 was identified as significantly associated with a reduced risk of DR (OR = 0.471, 95% CI = 0.324-0.684, p = 7.87 × 10- 5), even after rigorous adjustments for multiple testing. Sensitivity analyses further validated the robustness of this association, and linkage disequilibrium score regression analyses showed no significant genetic correlation between this metabolite and DR, suggesting a specific protective effect against DR. CONCLUSIONS Our study identifies 4-androsten-3beta,17beta-diol disulfate 2, a metabolite of androgens, as a significant protective factor against diabetic retinopathy, suggesting androgens as potential therapeutic targets.
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Affiliation(s)
- Yao Tan
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China
- Postdoctoral Station of Clinical Medicine, The Third Xiangya Hospital, Central South University, Changsha City, 410013, Hunan Province, China
| | - Zuyun Yan
- The Third Xiangya Hospital, Central South University, Changsha City, 410013, Hunan Province, China
| | - Jiayang Yin
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China
| | - Jiamin Cao
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China
| | - Bingyu Xie
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China
| | - Feng Zhang
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China
| | - Wenhua Zhang
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China.
| | - Wei Xiong
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha City, 410013, Hunan Province, China.
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Xian X, Li L, Ye J, Mo W, Liang D, Huang M, Chang Y, Cui Z. Betaine and I-LG may have a predictive value for ATB: A causal study in a large European population. PLoS One 2024; 19:e0306752. [PMID: 38968285 PMCID: PMC11226055 DOI: 10.1371/journal.pone.0306752] [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: 03/19/2024] [Accepted: 06/22/2024] [Indexed: 07/07/2024] Open
Abstract
PURPOSE To analyze the causal relationship between 486 human serum metabolites and the active tuberculosis (ATB) in European population. METHODS In this study, the causal relationship between human serum metabolites and the ATB was analyzed by integrating the genome-wide association study (GWAS). The 486 human serum metabolites were used as the exposure variable, three different ATB GWAS databases in the European population were set as outcome variables, and single nucleotide polymorphisms were used as instrumental variables for Mendelian Randomization. The inverse variance weighting was estimated causality, the MR-Egger intercept to estimate horizontal pleiotropy, and the combined effects of metabolites were also considered in the meta-analysis. Furthermore, the web-based MetaboAnalyst 6.0 was engaged for enrichment pathway analysis, while R (version 4.3.2) software and Review Manager 5.3 were employed for statistical analysis. RESULTS A total of 21, 17, and 19 metabolites strongly associated with ATB were found in the three databases after preliminary screening (P < 0.05). The intersecting metabolites across these databases included tryptophan, betaine, 1-linoleoylglycerol (1-monolinolein) (1-LG), 1-eicosatrienoylglycerophosphocholine, and oleoylcarnitine. Among them, betaine (I2 = 24%, P = 0.27) and 1-LG (I2 = 0%, P = 0.62) showed the lowest heterogeneity among the different ATB databases. In addition, the metabolic pathways of phosphatidylethanolamine biosynthesis (P = 0.0068), methionine metabolism (P = 0.0089), betaine metabolism (P = 0.0205) and oxidation of branched-chain fatty acids (P = 0.0309) were also associated with ATB. CONCLUSION Betaine and 1-LG may be biomarkers or auxiliary diagnostic tools for ATB. They may provide new guidance for medical practice in the early diagnosis and surveillance of ATB. In addition, by interfering with phosphatidylethanolamine biosynthesis, methionine metabolism, betaine metabolism, oxidation of branched-chain fatty acids, and other pathways, it is helpful to develop new anti-tuberculosis drugs and explore the virulence or pathogenesis of ATB at a deeper level, providing an effective reference for future studies.
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Affiliation(s)
- Xiaomin Xian
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou, China
| | - Li Li
- Department of Dermatology and Venereology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Jing Ye
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Key Discipline Platform of Tuberculosis Control, Guangxi Centre for Disease Control and Prevention, Nanning, Guangxi, China
| | - Wenxiu Mo
- School of Public Health and Management, Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Dabin Liang
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Key Discipline Platform of Tuberculosis Control, Guangxi Centre for Disease Control and Prevention, Nanning, Guangxi, China
| | - Minying Huang
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Key Discipline Platform of Tuberculosis Control, Guangxi Centre for Disease Control and Prevention, Nanning, Guangxi, China
| | - Yue Chang
- School of Medicine and Health Management, Guizhou Medical University, Guiyang, Guizhou, China
| | - Zhezhe Cui
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou, China
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Key Discipline Platform of Tuberculosis Control, Guangxi Centre for Disease Control and Prevention, Nanning, Guangxi, China
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Yao H, Shen S, Gao X, Song X, Xiang W. The causal relationship between blood metabolites and rosacea: A Mendelian randomization. Skin Res Technol 2024; 30:e13796. [PMID: 38895784 PMCID: PMC11187845 DOI: 10.1111/srt.13796] [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: 04/15/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024]
Abstract
BACKGROUND An increasing amount of research demonstrates that metabolic disorders are related to rosacea. However, the correlations and causal relationships among them remain unknown. METHODS We conducted not only forward 2-sample MR (Mendelian randomization) analyses but also reverse MR analyses which showed positive results in the forward MR analysis. In the forward MR analyses, inverse-variance weighted (IVW) and MR-Egger were performed as MR analyses. Cochran's Q test and the MR-Egger Intercept were used for sensitivity analyses. Concerning reverse MR analyses, IVW, MR-Egger, weighted median, simple mode, and weighted mode were applied. Cochran's Q test, MR-Egger Intercept, and MR pleiotropy residual sum and outlier (MR-PRESSO) outlier test were applied as sensitivity analyses. RESULTS A total of 24 metabolites and 1 metabolite ratio were shown to have a causal effect on rosacea. N-lactoyl phenylalanine (N-Lac-Phe) was estimated as statistically significant by Bonferroni correction. Interestingly, we found three metabolites that were negatively associated with rosacea, especially caffeine, which are in line with the results of a large cohort study of females. For reverse MR analysis, we revealed that rosacea could potentially decrease the generation of two metabolites: octadecenedioate (C18:1-DC) and methyl vanillate sulfate. CONCLUSION This study identified blood metabolites that may be associated with the development of rosacea. However, the exact mechanism by which these positive metabolites influence rosacea remains uncertain due to the paucity of experimental investigations. The combination of genetics and metabolomics offers novel viewpoints on the research of underlying mechanisms of rosacea and has significant value in screening and prevention of rosacea.
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Affiliation(s)
- Huiyi Yao
- Department of DermatologyZhejiang Chinese Medical UniversityHangzhou Third People's Hospital Affiliated to Zhejiang Chinese Medical UniversityHangzhouChina
| | - Sihao Shen
- Department of DermatologyZhejiang Chinese Medical UniversityHangzhou Third People's Hospital Affiliated to Zhejiang Chinese Medical UniversityHangzhouChina
| | - Xingyue Gao
- Department of DermatologyZhejiang Chinese Medical UniversityHangzhou Third People's Hospital Affiliated to Zhejiang Chinese Medical UniversityHangzhouChina
| | - Xiuzu Song
- Department of DermatologyHangzhou Third People's HospitalHangzhouChina
| | - Wenzhong Xiang
- Department of DermatologyHangzhou Third People's HospitalHangzhouChina
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Pan T, Bai L, Zhu D, Wei Y, Zhao Q, Feng F, Wang Z, Xu Y, Zhou X. The causal relationship between genetically predicted blood metabolites and idiopathic pulmonary fibrosis: A bidirectional two-sample Mendelian randomization study. PLoS One 2024; 19:e0300423. [PMID: 38626141 PMCID: PMC11020755 DOI: 10.1371/journal.pone.0300423] [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: 10/20/2023] [Accepted: 02/28/2024] [Indexed: 04/18/2024] Open
Abstract
BACKGROUND Numerous metabolomic studies have confirmed the pivotal role of metabolic abnormalities in the development of idiopathic pulmonary fibrosis (IPF). Nevertheless, there is a lack of evidence on the causal relationship between circulating metabolites and the risk of IPF. METHODS The potential causality between 486 blood metabolites and IPF was determined through a bidirectional two-sample Mendelian randomization (TSMR) analysis. A genome-wide association study (GWAS) involving 7,824 participants was performed to analyze metabolite data, and a GWAS meta-analysis involving 6,257 IPF cases and 947,616 control European subjects was conducted to analyze IPF data. The TSMR analysis was performed primarily with the inverse variance weighted model, supplemented by weighted mode, MR-Egger regression, and weighted median estimators. A battery of sensitivity analyses was performed, including horizontal pleiotropy assessment, heterogeneity test, Steiger test, and leave-one-out analysis. Furthermore, replication analysis and meta-analysis were conducted with another GWAS dataset of IPF containing 4,125 IPF cases and 20,464 control subjects. Mediation analyses were used to identify the mediating role of confounders in the effect of metabolites on IPF. RESULTS There were four metabolites associated with the elevated risk of IPF, namely glucose (odds ratio [OR] = 2.49, 95% confidence interval [95%CI] = 1.13-5.49, P = 0.024), urea (OR = 6.24, 95% CI = 1.77-22.02, P = 0.004), guanosine (OR = 1.57, 95%CI = 1.07-2.30, P = 0.021), and ADpSGEGDFXAEGGGVR (OR = 1.70, 95%CI = 1.00-2.88, P = 0.0496). Of note, the effect of guanosine on IPF was found to be mediated by gastroesophageal reflux disease. Reverse Mendelian randomization analysis displayed that IPF might slightly elevate guanosine levels in the blood. CONCLUSION Conclusively, hyperglycemia may confer a promoting effect on IPF, highlighting that attention should be paid to the relationship between diabetes and IPF, not solely to the diagnosis of diabetes. Additionally, urea, guanosine, and ADpSGEGDFXAEGGGVR also facilitate the development of IPF. This study may provide a reference for analyzing the potential mechanism of IPF and carry implications for the prevention and treatment of IPF.
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Affiliation(s)
- Tingyu Pan
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Le Bai
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Dongwei Zhu
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Yun Wei
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Qi Zhao
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Fanchao Feng
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Zhichao Wang
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Yong Xu
- School of Chinese Medicine, School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Xianmei Zhou
- Department of Pulmonary and Critical Care Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
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Dai X, Liang M, Dai Y, Ding S, Sun X, Xu L. Causality of genetically determined blood metabolites on irritable bowel syndrome: A Mendelian randomization study. PLoS One 2024; 19:e0298963. [PMID: 38568932 PMCID: PMC10990233 DOI: 10.1371/journal.pone.0298963] [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: 11/23/2023] [Accepted: 02/01/2024] [Indexed: 04/05/2024] Open
Abstract
BACKGROUND Irritable bowel syndrome (IBS) is one of the most common functional bowel disorders and dysmetabolism plays an important role in the pathogenesis of disease. Nevertheless, there remains a lack of information regarding the causal relationship between circulating metabolites and IBS. A two-sample Mendelian randomization (MR) analysis was conducted in order to evaluate the causal relationship between genetically proxied 486 blood metabolites and IBS. METHODS A two-sample MR analysis was implemented to assess the causality of blood metabolites on IBS. The study utilized a genome-wide association study (GWAS) to examine 486 metabolites as the exposure variable while employing a GWAS study with 486,601 individuals of European descent as the outcome variable. The inverse-variance weighted (IVW) method was used to estimate the causal relationship of metabolites on IBS, while several methods were performed to eliminate the pleiotropy and heterogeneity. Another GWAS data was used for replication and meta-analysis. In addition, reverse MR and linkage disequilibrium score regression (LDSC) were employed for additional assessment. Multivariable MR analysis was conducted in order to evaluate the direct impact of metabolites on IBS. RESULTS Three known and two unknown metabolites were identified as being associated with the development of IBS. Higher levels of butyryl carnitine (OR(95%CI):1.10(1.02-1.18),p = 0.009) and tetradecanedioate (OR(95%CI):1.13(1.04-1.23),p = 0.003)increased susceptibility of IBS and higher levels of stearate(18:0)(OR(95%CI):0.72(0.58-0.89),p = 0.003) decreased susceptibility of IBS. CONCLUSION The metabolites implicated in the pathogenesis of IBS possess potential as biomarkers and hold promise for elucidating the underlying biological mechanisms of this condition.
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Affiliation(s)
- Xinyi Dai
- Nanjing University of Chinese Medicine, Nanjing, China
| | - Min Liang
- Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Yanna Dai
- Department of Traditional Chinese Medicine, Wuxi Xinwu District Rehabilitation Hospital, Wuxi, China
| | - Shaohua Ding
- Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiaohe Sun
- Nanjing University of Chinese Medicine, Nanjing, China
| | - Luzhou Xu
- Nanjing University of Chinese Medicine, Nanjing, China
- Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
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Zou X, Huang H, Tan Y. Genetically determined metabolites in allergic conjunctivitis: A Mendelian randomization study. World Allergy Organ J 2024; 17:100894. [PMID: 38590722 PMCID: PMC10999487 DOI: 10.1016/j.waojou.2024.100894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 02/05/2024] [Accepted: 03/13/2024] [Indexed: 04/10/2024] Open
Abstract
Background Allergic conjunctivitis (AC) afflicts a significant portion of the global populace. Yet, its metabolic foundations remain largely unexplored. Methods We applied Mendelian Randomization (MR) and Linkage Disequilibrium Score Regression (LDSC) to scrutinize a cohort comprising 20 958 AC cases and 356 319 controls. Data were amalgamated from the metabolomics GWAS server and the FinnGen project, under strict quality control protocols. Results Using two-sample MR analysis, 486 blood metabolites were investigated in relation to AC. The IVW approach highlighted 18 metabolites as closely tied to AC risk; of these, 16 retained significance post sensitivity assessments for heterogeneity and horizontal pleiotropy. LDSC analysis, adopted to bolster our findings and negate confounders from shared genetic markers, revealed 8 metabolites with marked heritability, including: palmitate (OR = 0.614), 3-methoxytyrosine (OR = 0.657), carnitine (OR = 1.368), threonate (OR = 0.828), N-[3-(2-Oxopyrrolidin-1-yl)propyl]acetamide (OR = 1.257), metoprolol acid metabolite (OR = 0.982), oleoylcarnitine (OR = 0.635), and 2-palmitoylglycerophosphocholine (OR = 1.351). Conclusion AC is precipitated by ocular responses to environmental allergens. Our study unveils a causal link between 8 blood metabolites and AC. This insight accentuates the role of metabolites in AC onset, suggesting novel avenues for its early prediction, targeted prevention, and tailored therapeutic interventions.
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Affiliation(s)
- Xuyan Zou
- Changsha Aier Eye Hospital, Aier Eye Hospital Group, Changsha, 410000, China
| | - Haiyan Huang
- Clinical Medical College of Guizhou Medical University, Guiyang, 550004, China
| | - Yao Tan
- Department of Ophthalmology, The Third Xiangya Hospital, Central South University, Changsha, 410000, China
- Postdoctoral Station of Clinical Medicine, The Third Xiangya Hospital, Central South University, Changsha, 410000, China
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Sun T, Chen X, Yan H, Liu J. The causal association between serum metabolites and lung cancer based on multivariate Mendelian randomization. Medicine (Baltimore) 2024; 103:e37085. [PMID: 38363931 PMCID: PMC10869068 DOI: 10.1097/md.0000000000037085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 01/05/2024] [Indexed: 02/18/2024] Open
Abstract
This study seeks to understand the causal association between serum metabolites and different lung cancer types, an area yet to be extensively studied. We Used a two-sample Mendelian randomization (TSMR) approach, utilizing 486 blood metabolites as exposures and 3 distinct lung cancer types genome-wide association studies datasets as outcomes. We employed inverse variance weighting, MR-Egger, weighted median, simple mode, and weighted mode to estimate causal effects. We performed sensitivity analyses using Cochran Q test, MR-Egger intercept test, and MR-pleiotropy residual sum and outlier (MR-PRESSO). Linkage disequilibrium score (LDSC) analysis was conducted on the selected metabolites, and common confounding single nucleotide polymorphisms were eliminated using the human genotype-phenotype association Database. Metabolic pathway analysis was performed with MetaboAnalyst 5.0 software. Subsequently, a multivariate Mendelian randomization analysis was conducted to ascertain independent risk exposures. Our findings suggest independent risk factors for specific types of lung cancer: 7-methylxanthine and isoleucine for lung adenocarcinoma, cysteine and 1-arachidonoylglycerophosphocholine are identified as independent protective and risk factors for squamous lung cancer. Undecanoate (11:0) with Linoleate (18:2n6) showed a protective effect for small cell lung cancer. Additionally, 11 metabolic pathways were associated with lung cancer. This novel perspective offers a multidimensional understanding of lung cancer phenotypes, providing valuable guidance for identifying and screening of diverse lung cancer phenotypes.
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Affiliation(s)
- Tao Sun
- Department of Hematology and Oncology Laboratory, The Affiliated Shaoyang Hospital, Hengyang Medical School, University of South China
| | - Xiaoyang Chen
- Department of Scientific Research and Teaching, The Affiliated Shaoyang Hospital, Hengyang Medical School, University of South China
| | - Hui Yan
- Department of Hematology and Oncology Laboratory, The Affiliated Shaoyang Hospital, Hengyang Medical School, University of South China
| | - Jun Liu
- Department of Scientific Research, The First Affiliated Hospital of Shaoyang University, Shaoyang, Hunan Province, China
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Xu X, Wu LY, Wang SY, Yan M, Wang YH, Li L, Sun ZL, Zhao JX. Investigating causal associations among gut microbiota, metabolites, and psoriatic arthritis: a Mendelian randomization study. Front Microbiol 2024; 15:1287637. [PMID: 38426052 PMCID: PMC10902440 DOI: 10.3389/fmicb.2024.1287637] [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: 09/02/2023] [Accepted: 01/24/2024] [Indexed: 03/02/2024] Open
Abstract
Background Currently, there has been observed a significant alteration in the composition of the gut microbiome (GM) and serum metabolites in patients with psoriatic arthritis (PsA) compared to healthy individuals. However, previous observational studies have shown inconsistent results regarding the alteration of gut microbiota/metabolites. In order to shed light on this matter, we utilized Mendelian randomization to determine the causal effect of GM/metabolites on PsA. Methods We retrieved summary-level data of GM taxa/metabolites and PsA from publicly available GWAS statistics. Causal relationships between GM/metabolites and PsA were determined using a two-sample MR analysis, with the IVW approach serving as the primary analysis method. To ensure the robustness of our findings, we conducted sensitivity analyses, multivariable MR analysis (MVMR), and additional analysis including replication verification analysis, LDSC regression, and Steiger test analysis. Furthermore, we investigated reverse causality through a reverse MR analysis. Finally, we conducted an analysis of expression quantitative trait loci (eQTLs) involved in the metabolic pathway to explore potential molecular mechanisms of metabolism. Results Our findings reveal that eight GM taxa and twenty-three serum metabolites are causally related to PsA (P < 0.05). Notably, a higher relative abundance of Family Rikenellaceae (ORIVW: 0.622, 95% CI: 0.438-0.883, FDR = 0.045) and elevated serum levels of X-11538 (ORIVW: 0.442, 95% CI: 0.250-0.781, FDR = 0.046) maintain significant causal associations with a reduced risk of PsA, even after adjusting for multiple testing correction and conducting MVMR analysis. These findings suggest that Family Rikenellaceae and X-11538 may have protective effects against PsA. Our sensitivity analysis and additional analysis revealed no significant horizontal pleiotropy, reverse causality, or heterogeneity. The functional enrichment analysis revealed that the eQTLs examined were primarily associated with glycerolipid metabolism and the expression of key metabolic factors influenced by bacterial infections (Vibrio cholerae and Helicobacter pylori) as well as the mTOR signaling pathway. Conclusion In conclusion, our study demonstrates that Family Rikenellaceae and X-11538 exhibit a strong and negative causal relationship with PsA. These particular GM taxa and metabolites have the potential to serve as innovative biomarkers, offering valuable insights into the treatment and prevention of PsA. Moreover, bacterial infections and mTOR-mediated activation of metabolic factors may play an important role in this process.
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Affiliation(s)
- Xiao Xu
- Department of Nursing, Nantong Health College of Jiangsu Province, Nantong, China
| | - Lin-yun Wu
- School of Nursing, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shu-yun Wang
- Academic Affair Office, Nantong Vocational University, Nantong, China
| | - Min Yan
- Department of Epidemiology, School of Public Health, Changzhou University, Changzhou, China
- Faculty of Health and Welfare, Satakunta University of Applied Sciences, Pori, Finland
| | - Yuan-Hong Wang
- Department of Rheumatology, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Li Li
- Department of Rheumatology, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Zhi-ling Sun
- Department of Epidemiology, School of Public Health, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ji-Xiang Zhao
- Department of Nursing, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
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Zeng Y, Liu H, Pei Z, Li R, Liu Z, Liao C. Evaluation of the causal effects of blood metabolites on irritable bowel syndrome: Mendelian randomization. BMC Gastroenterol 2024; 24:19. [PMID: 38182988 PMCID: PMC10768268 DOI: 10.1186/s12876-023-03111-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 12/28/2023] [Indexed: 01/07/2024] Open
Abstract
BACKGROUND Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder characterized by abdominal pain, discomfort, and changes in bowel habits. The mechanism underlying IBS remains unclear, and little evidence exists for clarifying the causal relationship between blood metabolites and IBS. METHODS We conducted a Mendelian randomization (MR) study using two samples. Exposure data for 7824 Europeans were extracted from a genome-wide association study (GWAS) on metabolite levels. The IBS GWAS data from the GWAS database were used for the initial analysis. The primary analysis of causal relationships was conducted using inverse-variance weighting (IVW) with MR-Egger and weighted medians as supplementary analyses. Sensitivity analyses were performed using a combination of the Cochran's Q test, MR-Egger intercept test, Mendelian randomization pleiotropy residual sum and outlier, and leave-one-out analysis. For significant associations, replication and meta-analyses were performed using additional independent IBS case GWAS data released by the FinnGen Consortium R9. To identify the metabolites, score regression, confounding analysis, and reverse MR were performed to further assess the causal relationships between the metabolites. RESULTS After rigorous screening, we identified four known metabolites to be associated with IBS (stearate, odds ratio [OR]: 0.74, 95% confidence interval [CI]: 0.59-0.92; arginine, OR: 1.36, 95% CI: 1.07-1.74; 1-palmitoylglycerol, OR:1.49, 95% CI: 1.07-2.07; 1-palmitoylglycerophosphoinositol, OR: 0.84, 95% CI: 0.71-0.99). CONCLUSIONS MR analysis revealed a causal relationship between the four metabolites and IBS, providing preliminary evidence for the pathogenesis of IBS. Our results provide novel insights into the potential biomarkers of IBS.
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Affiliation(s)
- Yu Zeng
- Jiangxi Medical College, Nanchang University, Nanchang, 330006, China
- Gastrointestinal Hernia Surgery, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, China
| | - Huabing Liu
- Jiangxi Medical College, Nanchang University, Nanchang, 330006, China
- Gastrointestinal Hernia Surgery, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, China
| | - Zhihui Pei
- Jiangxi Medical College, Nanchang University, Nanchang, 330006, China
- Gastrointestinal Hernia Surgery, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, China
| | - Rui Li
- Jiangxi Medical College, Nanchang University, Nanchang, 330006, China
- Gastrointestinal Hernia Surgery, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, China
| | - Zuihui Liu
- Jiangxi Medical College, Nanchang University, Nanchang, 330006, China
- Gastrointestinal Hernia Surgery, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, China
| | - Chuanwen Liao
- Gastrointestinal Hernia Surgery, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, China.
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Qi J, Ren X, Hou Y, Zhang Y, Zhang Y, Tan E, Wang L. Triglyceride-Glucose Index is Significantly Associated with the Risk of Hyperuricemia in Patients with Nonalcoholic Fatty Liver Disease. Diabetes Metab Syndr Obes 2023; 16:1323-1334. [PMID: 37188227 PMCID: PMC10179341 DOI: 10.2147/dmso.s408075] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/27/2023] [Indexed: 05/17/2023] Open
Abstract
Purpose The triglyceride-glucose (TyG) index is a new index of insulin resistance (IR), and its association with hyperuricemia (HUA) is unclear. The aim of this study was to investigate whether TyG is an independent risk factor for hyperuricemia (HUA) in patients with nonalcoholic fatty liver disease (NAFLD). Patients and Methods We retrospectively analyzed 461 patients with ultrasound-confirmed NAFLD and calculated the TyG index. Multivariate logistic regression was used to analyze the relationship between the TyG index and HUA in NAFLD patients. The correlation between the TyG index and HUA was further confirmed by a restricted cubic spline. Furthermore, the stability of the association between TyG index and HUA was examined using subgroup analysis. Receiver operating characteristic (ROC) curves were constructed to evaluate the predictive value of the TyG index on HUA. Multivariate linear regression was used to analyze the linear relationship between the TyG index and serum uric acid. Results A total of 166 HUA patients and 295 non-HUA patients were included in the study. The results of multivariate logistic regression analysis showed that after controlling the confounding risk factors, TyG was still an independent risk factor for HUA (OR = 2.00, 95% CI: 1.38 -2.91, p < 0.001). Restricted cubic splines showed that HUA risk increased linearly with TyG across the entire TyG range. The ROC curve showed that TyG index was better than triglyceride in predicting HUA in NAFLD patients, with AUC values of 0.62 and 0.59, respectively. Multiple linear regression analysis showed that TyG index was significantly positively correlated with blood uric acid (B = 1.37, 95% CI: 0.67-2.08, p < 0.001). Conclusion TyG index is an independent risk factor for HUA in patients with NAFLD. The increase of the TyG index level is closely related to the occurrence and development of HUA in patients with NAFLD.
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Affiliation(s)
- Jiaxin Qi
- Second Department of Clinical Medicine, Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
| | - Xiayu Ren
- Second Department of Clinical Medicine, Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
| | - Yanjuan Hou
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
| | - Yaqing Zhang
- Second Department of Clinical Medicine, Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
| | - Yanru Zhang
- Second Department of Clinical Medicine, Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
| | - Enxue Tan
- Second Department of Clinical Medicine, Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
| | - Lihua Wang
- Division of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, People’s Republic of China
- Correspondence: Lihua Wang, Division of Nephrology, The Second Hospital of Shanxi Medical University, 382 Wuyi Road, Taiyuan, Shanxi, 030000, People’s Republic of China, Tel +8615234166600, Email
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