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Zhang X, Wang Q, Wang Y, Ma C, Zhao Q, Yin H, Li L, Wang D, Huang Y, Zhao Y, Shi X, Li X, Huang C. Interleukin-6 promotes visceral adipose tissue accumulation during aging via inhibiting fat lipolysis. Int Immunopharmacol 2024; 132:111906. [PMID: 38593501 DOI: 10.1016/j.intimp.2024.111906] [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: 11/03/2023] [Revised: 03/06/2024] [Accepted: 03/18/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND Age-related visceral obesity could contribute to the development of cardiometabolic complications. The pathogenesis of visceral fat mass accumulation during the aging process remains complex and largely unknown. Interleukin-6 (IL-6) has emerged as one of the prominent inflammaging markers which are elevated in circulation during aging. However, the precise role of IL-6 in regulating age-related visceral adipose tissue accumulation remains uncertain. RESULTS A cross-sectional study including 77 older adults (≥65 years of age) was initially conducted. There was a significant positive association between serum IL-6 levels and visceral fat mass. We subsequently validated a modest but significant elevation in serum IL-6 levels in aged mice. Furthermore, we demonstrated that compared to wildtype control, IL-6 deficiency (IL-6 KO) significantly attenuated the accumulation of visceral adipose tissue during aging. Further metabolic characterization suggested that IL-6 deficiency resulted in improved lipid metabolism parameters and energy expenditure in aged mice. Moreover, histological examinations of adipose depots revealed that the absence of IL-6 ameliorated adipocyte hypertrophy in visceral adipose tissue of aged mice. Mechanically, the ablation of IL-6 could promote the PKA-mediated lipolysis and consequently mitigate lipid accumulation in adipose tissue in aged mice. CONCLUSION Our findings identify a detrimental role of IL-6 during the aging process by promoting visceral adipose tissue accumulation through inhibition of lipolysis. Therefore, strategies aimed at preventing or reducing IL-6 levels may potentially ameliorate age-related obesity and improve metabolism during aging.
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Affiliation(s)
- Xiaofang Zhang
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Qingxuan Wang
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Yaru Wang
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Chen Ma
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Qing Zhao
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Hongyan Yin
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Long Li
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China; Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China
| | - Dongmei Wang
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China; Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen 361023, China
| | - Yinxiang Huang
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Yan Zhao
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Xiulin Shi
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China
| | - Xuejun Li
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China.
| | - Caoxin Huang
- Department of Endocrinology and Diabetes, Xiamen Diabetes Institute, Fujian Key Laboratory of Translational Research for Diabetes, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361003, China.
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Yu L, Guo Z, Long Q, Zhao X, Liu Y, Cao X, Zhang Y, Yan W, Qian QQ, Chen J, Teng Z, Zeng Y. Modifiable Lifestyle, Sedentary Behaviors and the Risk of Frailty: A Univariate and Multivariate Mendelian Randomization Study. Adv Biol (Weinh) 2024; 8:e2400052. [PMID: 38532244 DOI: 10.1002/adbi.202400052] [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: 01/29/2024] [Revised: 03/11/2024] [Indexed: 03/28/2024]
Abstract
This research conducted a two-sample univariate and multivariate Mendelian Randomization (MR) analysis to explore the causal link between different types of leisure sedentary behavior (LSB) and frailty. Independent instrumental variables significantly associated with sedentary behaviors (p < 5 × 10-8) are obtained from a genome-wide association study (GWAS) of 422,218 individuals, and Frailty Index (FI) are derived from the latest GWAS dataset of 175,226 individuals. MR analysis is conducted using inverse variance weighting, MR-Egger, weighted median, simple mode, and weighted mode, supplemented by MRAPSS. Univariate MR revealed that sedentary behaviors such as watching television increased the risk of frailty (OR, 1.271; 95% CI: 1.202-1.345; p = 6.952 × 10-17), as sedentary driving behaviors are done (OR, 1.436; 95% CI: 1.026-2.011; p = 0.035). Further validation through APSS, taking into account cryptic relatedness, stratification, and sample overlap, maintained the association between television viewing and increased frailty risk (OR, 1.394; 95% CI: 1.266-1.534; p = 1.143 × 10-11), while the association with driving dissipated. In multivariate inverse variance weighted (IVW) analysis, after adjusting for C-reactive protein (CRP) levels, television Sedentary behavior (SB) inversely affected frailty (OR, 0.782; 95% CI: 0.724-0.845; p = 4.820 × 10-10). This study indicates that televisio SB significantly increases the risk of frailty, suggesting potential biological heterogeneity behind specific sedentary activities. This process may interact with inflammation, influencing the development of frailty.
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Affiliation(s)
- Ling Yu
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Zeyi Guo
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Qing Long
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Xinling Zhao
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Yilin Liu
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Xiang Cao
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Yunqiao Zhang
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Weimin Yan
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Qing Qing Qian
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Jian Chen
- Department of Gastroenterology, Nanchong Central Hospital, Nanchong, Sichuan Province, 637000, China
| | - Zhaowei Teng
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
| | - Yong Zeng
- Department of Psychiatry, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, 650101, China
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Tian G, Zhou R, Guo X, Li R. Causal effects of blood pressure and the risk of frailty: a bi-directional two-sample Mendelian randomization study. J Hum Hypertens 2024; 38:329-335. [PMID: 38361027 DOI: 10.1038/s41371-024-00901-w] [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: 08/28/2023] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
Observational studies have indicated that high blood pressure (BP) may be a risk factor to frailty. However, the causal association between BP and frailty remains not well determined. The purpose of this bi-directional two-sample Mendelian randomization (MR) study was to investigate the causal relationship between BP and frailty. Independent single nucleotide polymorphisms (SNPs) strongly (P < 5E-08) associated with systolic BP (SBP), diastolic BP (DBP), and pulse pressure (PP) were selected as instrumental variables. Two different published genome-wide association studies (GWAS) on BP from the CHARGE (n = 810,865) and ICBP (n = 757,601) consortia were included. Summary-level data on frailty index (FI) were obtained from the latest GWAS based on UK Biobank and Swedish TwinGene cohorts (n = 175,226). Inverse variance weighted (IVW) approach with other sensitivity analyses were used to calculate the causal estimate. Using the CHARGE dataset, genetic predisposition to increased SBP (β = 0.135, 95% CI = 0.093 to 0.176, P = 1.73E-10), DBP (β = 0.145, 95% CI = 0.104 to 0.186, P = 3.14E-12), and PP (β = 0.114, 95% CI = 0.070 to 0.157, p = 2.87E-07) contributed to a higher FI, which was validated in the ICBP dataset. There was no significant causal effect of FI on SBP, DBP, and PP. Similar results were obtained from different MR methods, indicating good stability. There was potential heterogeneity detected by Cochran's Q test, but no horizontal pleiotropy was observed in MR-Egger intercept test (P > 0.05). These findings evinced that higher BP and PP were causally associated with an increased risk of frailty, suggesting that controlling hypertension could reduce the risk of frailty.
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Affiliation(s)
- Ge Tian
- Xi'an Medical University, Xi'an, 710021, Shaanxi, China
- Department of Geriatric Neurology, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
| | - Rong Zhou
- Department of Geriatric Neurology, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China
| | - Xingzhi Guo
- Department of Geriatric Neurology, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.
| | - Rui Li
- Xi'an Medical University, Xi'an, 710021, Shaanxi, China.
- Department of Geriatric Neurology, Shaanxi Provincial People's Hospital, Xi'an, 710068, Shaanxi, China.
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Lei H, Xing Z, Chen X, Dai Y, Cheng B, Wang S, Kang T, Wang Q, Zhang J, Jia J, Zheng Y. Exploration of the causality of frailty index on psoriasis: A Mendelian randomization study. Skin Res Technol 2024; 30:e13641. [PMID: 38426414 PMCID: PMC10905529 DOI: 10.1111/srt.13641] [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: 11/15/2023] [Accepted: 02/19/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND Frailty is associated with a variety of diseases, but the relationship between frailty and psoriasis remains unclear. METHODS First, we conducted a two-sample Mendelian randomization based on genome-wide association studies (GWAS) to investigate genetic causality between frailty index and common diseases in dermatology. Inverse variance weighted was used to estimate causality. Second, expression quantitative trait locus (eQTLs) analysis was conducted to identify the genes affected by Single nucleotide polymorphisms (SNPs). Third, we performed function and pathway enrichment, transcriptome-wide association studies (TWAS) analysis based on eQTLs. RESULTS It was shown that the rise of frailty index could increase the risk of psoriasis (IVW, beta = 0.916, OR = 2.500, 95%CI:1.418-4.408, p = 0.002) through Mendelian randomization (MR), and there was no heterogeneity and pleiotropy. There was no causality between the frailty index and other common diseases in dermatology. We found 31 eQTLs based on strongly correlated SNPs in the causality. TWAS analysis found that the expressions of four genes were closely related to psoriasis, including HLA-DQA1, HLA-DQA2, HLA-DRB1 and HLA-DQB1. CONCLUSION It suggested that the frailty index had a significant positive causality on the risk of psoriasis, which was well documented by combined genomic, transcriptome, and proteome analyses.
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Affiliation(s)
- Hao Lei
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Zixuan Xing
- Department of Infectious DiseasesThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Xin Chen
- State Key Laboratory of Oral & Maxillofacial Reconstruction and RegenerationNational Clinical Research Center for Oral DiseasesShaanxi Clinical Research Center for Oral DiseasesDepartment of Orthodontics, School of StomatologyThe Fourth Military Medical UniversityXi′anChina
| | - Yilin Dai
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Baochen Cheng
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Shengbang Wang
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Tong Kang
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Qian Wang
- Department of DermatologyTangdu HospitalAir Force Military Medical UniversityXi'anChina
| | - Jing Zhang
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Jinjing Jia
- State Key Laboratory of Dampness Syndrome of Chinese MedicineThe Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhouChina
- Department of DermatologyThe Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhouChina
- Department of Dermatology,Guangdong Provincial Key Laboratory of Chinese Medicine for Prevention and Treatment of Refractory Chronic DiseaseGuangzhouChina
| | - Yan Zheng
- Department of DermatologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
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Wu L, Zhao XH, Zhou SX, Jiang JJ. Genetic predisposition to white blood cells in relation to the risk of frailty. Aging Clin Exp Res 2023; 35:3023-3031. [PMID: 37923935 DOI: 10.1007/s40520-023-02609-2] [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: 07/21/2023] [Accepted: 10/24/2023] [Indexed: 11/06/2023]
Abstract
BACKGROUND Observational studies have suggested an association between white blood cells (WBCs) and frailty, but considering the susceptibility to reverse causality and confounding, the causal direction and magnitude of this association remain ambiguous. Our aim was to investigate the causal effect of WBCs on frailty by means of a Mendelian randomization (MR) analysis. METHODS Based on the genome-wide association study (GWAS) summary statistics data provided by the European Bioinformatics Institute (EBI), we carried out a two-sample MR study. We applied the genetically predicted independent WBCs from GWAS as a measure of exposure data. The Rockwood Frailty Index (FI) was used as outcome measure, which was derived from a meta-analysis from GWAS in UK Biobank European ancestry participants and Swedish TwinGene participants. Our study applied inverse variance weighted (IVW), weighted median, Mendelian randomization-Egger (MR-Egger) and outlier test (MR-PRESSO) methods to explore relationships between various WBCs and frailty. RESULTS In our study, a possible causal relationship between eosinophil levels and frailty was demonstrated by two-sample MR analysis. Eosinophils were associated with FI (beta:0.0609; 95% CI 0.0382, 0.0836; P = 1.38E-07). Our results suggest that as the level of eosinophils increases, so does the risk of frailty. No meaningful causal relationship between neutrophils, lymphocytes, monocytes or basophils and FI was found in the MR results (P > 0.05). CONCLUSIONS According to this MR study, higher eosinophil counts are related to an increased risk of frailty. To validate these findings and investigate the mechanisms underlying these connections, future studies are warranted.
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Affiliation(s)
- Li Wu
- Department of Geriatics, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-Chemical Injury Diseases of Zhejiang Province, Hangzhou, 310003, China
| | - Xiao-Hong Zhao
- Department of Geriatics, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-Chemical Injury Diseases of Zhejiang Province, Hangzhou, 310003, China
| | - Shi-Xian Zhou
- Department of Geriatics, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-Chemical Injury Diseases of Zhejiang Province, Hangzhou, 310003, China
| | - Jing-Jin Jiang
- Department of Geriatics, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China.
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-Chemical Injury Diseases of Zhejiang Province, Hangzhou, 310003, China.
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Mak JKL, Kananen L, Qin C, Kuja‐Halkola R, Tang B, Lin J, Wang Y, Jääskeläinen T, Koskinen S, Lu Y, Magnusson PKE, Hägg S, Jylhävä J. Unraveling the metabolic underpinnings of frailty using multicohort observational and Mendelian randomization analyses. Aging Cell 2023; 22:e13868. [PMID: 37184129 PMCID: PMC10410014 DOI: 10.1111/acel.13868] [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: 03/17/2023] [Revised: 04/26/2023] [Accepted: 04/29/2023] [Indexed: 05/16/2023] Open
Abstract
Identifying metabolic biomarkers of frailty, an age-related state of physiological decline, is important for understanding its metabolic underpinnings and developing preventive strategies. Here, we systematically examined 168 nuclear magnetic resonance-based metabolomic biomarkers and 32 clinical biomarkers for their associations with frailty. In up to 90,573 UK Biobank participants, we identified 59 biomarkers robustly and independently associated with the frailty index (FI). Of these, 34 associations were replicated in the Swedish TwinGene study (n = 11,025) and the Finnish Health 2000 Survey (n = 6073). Using two-sample Mendelian randomization, we showed that the genetically predicted level of glycoprotein acetyls, an inflammatory marker, was statistically significantly associated with an increased FI (β per SD increase = 0.37%, 95% confidence interval: 0.12-0.61). Creatinine and several lipoprotein lipids were also associated with increased FI, yet their effects were mostly driven by kidney and cardiometabolic diseases, respectively. Our findings provide new insights into the causal effects of metabolites on frailty and highlight the role of chronic inflammation underlying frailty development.
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Affiliation(s)
- Jonathan K. L. Mak
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Laura Kananen
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
- Faculty of Social Sciences (Health Sciences) and Gerontology Research Center (GEREC)University of TampereTampereFinland
| | - Chenxi Qin
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Ralf Kuja‐Halkola
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Bowen Tang
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Jake Lin
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
- Faculty of Social Sciences (Health Sciences) and Gerontology Research Center (GEREC)University of TampereTampereFinland
- Institute for Molecular Medicine Finland FIMM, Helsinki Institute of Life Science HiLIFE, University of HelsinkiHelsinkiFinland
| | - Yunzhang Wang
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
- Department of Clinical Sciences, Danderyd HospitalKarolinska InstitutetStockholmSweden
| | | | | | - Yi Lu
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
- Department of Global Public HealthKarolinska InstitutetStockholmSweden
| | - Patrik K. E. Magnusson
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Sara Hägg
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Juulia Jylhävä
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
- Faculty of Social Sciences (Health Sciences) and Gerontology Research Center (GEREC)University of TampereTampereFinland
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