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Zhao X, Han D, Zhao C, Yang F, Wang Z, Gao Y, Jin M, Tao R. New insights into the role of Klotho in inflammation and fibrosis: molecular and cellular mechanisms. Front Immunol 2024; 15:1454142. [PMID: 39308872 PMCID: PMC11412887 DOI: 10.3389/fimmu.2024.1454142] [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: 06/24/2024] [Accepted: 08/12/2024] [Indexed: 09/25/2024] Open
Abstract
As the body's defense mechanism against damage and infection, the inflammatory response is a pathological process that involves a range of inflammatory cells and cytokines. A healthy inflammatory response helps the body repair by eliminating dangerous irritants. However, tissue fibrosis can result from an overly intense or protracted inflammatory response. The anti-aging gene Klotho suppresses oxidation, delays aging, and fosters development of various organs. Numerous investigations conducted in the last few years have discovered that Klotho expression is changed in a variety of clinical diseases and is strongly linked to the course and outcome of a disease. Klotho functions as a co-receptor for FGF and as a humoral factor that mediates intracellular signaling pathways such as transforming growth factor β (TGF-β), toll-like receptors (TLRs), nuclear factor-kappaB (NF-κB), renin -angiotensin system (RAS), and mitogen-activated protein kinase (MAPK). It also interferes with the phenotype and function of inflammatory cells, such as monocytes, macrophages, T cells, and B cells. Additionally, it regulates the production of inflammatory factors. This article aims to examine Klotho's scientific advances in terms of tissue fibrosis and the inflammatory response in order to provide novel therapy concepts for fibrotic and inflammatory disorders.
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Affiliation(s)
- Xinyue Zhao
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
| | - Donghe Han
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
- Department of Anatomy, Medical College, Dalian University, Dalian, Liaoning, China
| | - Chun Zhao
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
| | - Fengfan Yang
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
| | - Zhimei Wang
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
| | - Yujiao Gao
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
| | - Meihua Jin
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, Liaoning, China
- Department of Immunology, Medical College, Dalian University, Dalian, Liaoning, China
| | - Ran Tao
- Department of Anatomy, Medical College, Dalian University, Dalian, Liaoning, China
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Liu S, Zhu Z, Yu K, Zhang W, Pu J, Lv Y, Tang Z, Liu F, Sun Y. U-shaped association between serum Klotho and all-cause mortality in US cardiovascular patients: a prospective cohort study. Front Endocrinol (Lausanne) 2024; 15:1405665. [PMID: 38948524 PMCID: PMC11212453 DOI: 10.3389/fendo.2024.1405665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Accepted: 05/31/2024] [Indexed: 07/02/2024] Open
Abstract
Background Increased levels of serum Klotho have been associated with a reduced risk of several cardiovascular diseases (CVD). However, limited studies exist on the association between serum Klotho and mortality in patients with CVD. Methods We collected data from CVD patients in the National Health and Nutrition Examination Survey (NHANES) spanning 2007 to 2016. We linked NHANES data with the National Death Index to determine the survival status of participants. Univariate and multivariable Cox regression models were used to investigate the relationship between serum Klotho levels and mortality in CVD patients. The relationship between serum Klotho quartiles and mortality in CVD patients was visualized using Kaplan-Meier (KM) curves and restricted cubic spine. Finally, subgroup analyses were used to examine the association between serum Klotho and all-cause mortality in different populations. Results 1905 patients with CVD were finally enrolled in our study with a mean follow-up of 7.1 years. The average age of the participants was 63.4 years, with 58.40% being male. KM showed that lower Klotho levels were associated with lower survival rates. After adjusting for potential confounders, patients with higher serum Klotho levels had lower all-cause mortality (Q1: 1.00, Q2: 0.58 (0.42-0.80), Q3: 0.69 (0.47-1.01), and Q4:0.64 (0.45-0.92). However, the relationship between serum Klotho levels and cardiovascular mortality was not statistically significant. Dose-response analysis shows a U-shaped relationship between serum Klotho levels and all-cause mortality in patients with CVD (P nonlinear=0.002). Subgroup analysis indicated that participants with a history of hypertension had a higher risk of all-cause mortality in serum Klotho Q4 compared to Q1 (P trend <0.05). Conclusion The relationship between serum Klotho levels and all-cause mortality in CVD patients exhibits a U-shaped association. The underlying mechanisms of this association need further investigation.
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Affiliation(s)
- Shasha Liu
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Zhanfang Zhu
- Department of Internal Medicine, Xi’an Jiaotong University Hospital, Xi’an, China
| | - Kai Yu
- Department of Cardiology, Pucheng County Hospital, Weinan, China
| | - Wei Zhang
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Jie Pu
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Ying Lv
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Zhiguo Tang
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Fuqiang Liu
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Yongqiang Sun
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
- Department of Interventional Radiography, Shanxi Provincial People’s Hospital, Xi’an, China
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Wen Z, Liu X, Zhang T. L-shaped association of systemic immune-inflammation index (SII) with serum soluble α-Klotho in the prospective cohort study from the NHANES database. Sci Rep 2024; 14:13189. [PMID: 38851827 PMCID: PMC11162490 DOI: 10.1038/s41598-024-64050-3] [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: 03/03/2024] [Accepted: 06/04/2024] [Indexed: 06/10/2024] Open
Abstract
The systemic immune-inflammation index (SII), an integrated and ground-breaking inflammatory measure, has been widely used in various fields. We aimed to assess the association between the systemic immune-inflammation index (SII) and α-Klotho (a new anti-aging biomarker). In this cross-sectional investigation, people with complete information on SII and α-Klotho from the National Health and Nutrition Examination Survey (NHANES) between 2007 and 2016 were the study's subject population. SII was calculated by platelet count × neutrophil count/lymphocyte count. The association between SII and α-Klotho was investigated using multivariable linear regression and a generalized additive model. In order to explore the non-linear connection, we employed smoothed curve fitting. Subgroup analysis were also performed. A total of 13,701 participants with an average age of 57.73 ± 10.86 years were enrolled, of whom 51.53% were female. After fully adjustment, SII was negatively associated with serum soluble α-Klotho [β(95% CI) = - 0.07 (- 0.08, - 0.05)]. Furthermore, we found L-shaped association between SII and klotho protein level, with the inflection point at 255 pg/ml. Subgroup analysis and interaction test revealed that there was no discernible dependence on gender, age, race, smoking, alcohol, diabetes and hypertension (all p for interaction > 0.05). SII level was negatively associated with serum klotho protein concentration in American adults. To verify our findings, more large-scale prospective investigations are still required.
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Affiliation(s)
- Zujun Wen
- Department of Pharmacy, Heyuan People's Hospital, Heyuan, China
| | - Xiang Liu
- The First Affiliated Hospital of Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Tingting Zhang
- Department of Pharmacy, Heyuan People's Hospital, Heyuan, China.
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Biscetti F, Rando MM, Cecchini AL, Nicolazzi MA, Rossini E, Angelini F, Iezzi R, Eraso LH, Dimuzio PJ, Pitocco D, Gasbarrini A, Massetti M, Flex A. The role of Klotho and FGF23 in cardiovascular outcomes of diabetic patients with chronic limb threatening ischemia: a prospective study. Sci Rep 2023; 13:6150. [PMID: 37061530 PMCID: PMC10105766 DOI: 10.1038/s41598-023-33190-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 04/08/2023] [Indexed: 04/17/2023] Open
Abstract
Cardiovascular complications after lower extremity revascularization (LER) are common in diabetic patients with peripheral arterial disease (PAD) and chronic limb threatening ischemia (CLTI). The Klotho-fibroblast growth factor 23 (FGF23) axis is associated with endothelial injury and cardiovascular risk. We aimed to analyze the relationship between Klotho and FGF23 serum levels and the incidence of major adverse cardiovascular events (MACE) and major adverse limb events (MALE) after LER in diabetic patients with PAD and CLTI. Baseline levels of Klotho and FGF23, and their association with subsequent incidence of MACE and MALE were analyzed in a prospective, non-randomized study in a population of diabetic patients with PAD and CLTI requiring LER. A total of 220 patients were followed for 12 months after LER. Sixty-three MACE and 122 MALE were recorded during follow-up period. Baseline lower Klotho serum levels (295.3 ± 151.3 pg/mL vs. 446.4 ± 171.7 pg/mL, p < 0.01), whereas increased serum levels FGF23 (75.0 ± 11.8 pg/mL vs. 53.2 ± 15.4 pg/mL, p < 0.01) were significantly associated with the development of MACE. Receiver operating characteristic (ROC) analysis confirmed the predictive power of Klotho and FGF23 baseline levels. Furthermore, decreased Klotho levels were associated with the occurrence of MALE after LER (329.1 ± 136.8 pg/mL vs 495.4 ± 183.9 pg/mL, p < 0.01). We found that Klotho and FGF23 baseline levels are a potential biomarker for increased cardiovascular risk after LER in diabetic patients with PAD and CLTI.
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Affiliation(s)
- Federico Biscetti
- Cardiovascular Internal Medicine, Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy.
| | - Maria Margherita Rando
- Cardiovascular Internal Medicine, Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | | | - Maria Anna Nicolazzi
- Cardiovascular Internal Medicine, Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Enrica Rossini
- Cardiovascular Internal Medicine, Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Flavia Angelini
- Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy
| | - Roberto Iezzi
- Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy
- Radiology Unit, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
| | - Luis H Eraso
- Division of Vascular and Endovascular Surgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Paul J Dimuzio
- Division of Vascular and Endovascular Surgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Dario Pitocco
- Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy
- Diabetology Unit, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
| | - Antonio Gasbarrini
- Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy
- Department of Medical and Surgical Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Massimo Massetti
- Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy
- Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Andrea Flex
- Cardiovascular Internal Medicine, Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Agostino Gemelli 8, 00168, Rome, Italy
- Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy
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Mohhamed SA, Khadir F, Rahimi Z, Kohsari M. Klotho G395A variants are associated with T2DM and diabetic nephropathy and influence on the levels of biochemical parameters. GENE REPORTS 2023. [DOI: 10.1016/j.genrep.2022.101733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Tang A, Zhang Y, Wu L, Lin Y, Lv L, Zhao L, Xu B, Huang Y, Li M. Klotho's impact on diabetic nephropathy and its emerging connection to diabetic retinopathy. Front Endocrinol (Lausanne) 2023; 14:1180169. [PMID: 37143722 PMCID: PMC10151763 DOI: 10.3389/fendo.2023.1180169] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 04/04/2023] [Indexed: 05/06/2023] Open
Abstract
Diabetic nephropathy (DN) is the leading cause of end-stage renal disease worldwide and is a significant burden on healthcare systems. α-klotho (klotho) is a protein known for its anti-aging properties and has been shown to delay the onset of age-related diseases. Soluble klotho is produced by cleavage of the full-length transmembrane protein by a disintegrin and metalloproteases, and it exerts various physiological effects by circulating throughout the body. In type 2 diabetes and its complications DN, a significant decrease in klotho expression has been observed. This reduction in klotho levels may indicate the progression of DN and suggest that klotho may be involved in multiple pathological mechanisms that contribute to the onset and development of DN. This article examines the potential of soluble klotho as a therapeutic agent for DN, with a focus on its ability to impact multiple pathways. These pathways include anti-inflammatory and oxidative stress, anti-fibrotic, endothelial protection, prevention of vascular calcification, regulation of metabolism, maintenance of calcium and phosphate homeostasis, and regulation of cell fate through modulation of autophagy, apoptosis, and pyroptosis pathways. Diabetic retinopathy shares similar pathological mechanisms with DN, and targeting klotho may offer new insights into the prevention and treatment of both conditions. Finally, this review assesses the potential of various drugs used in clinical practice to modulate klotho levels through different mechanisms and their potential to improve DN by impacting klotho levels.
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Affiliation(s)
- Anqi Tang
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Yu Zhang
- Department of Nephrology, Shaanxi Provincial Hospital of Traditional Chinese Medicine, Xi’an, China
| | - Ling Wu
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Yong Lin
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Lizeyu Lv
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Liangbin Zhao
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Bojun Xu
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Youqun Huang
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Mingquan Li
- Department of Nephrology, Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
- *Correspondence: Mingquan Li,
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Martín-González C, Espelosín-Ortega E, Abreu-González P, Fernández-Rodríguez C, Vera-Delgado VE, González-Navarrete L, García-Rodríguez A, Riera AM, González-Reimers E. Klotho Levels and Their Relationship with Inflammation and Survival among Alcoholic Patients. Biomolecules 2022; 12:1151. [PMID: 36009045 PMCID: PMC9405938 DOI: 10.3390/biom12081151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/08/2022] [Accepted: 08/18/2022] [Indexed: 11/25/2022] Open
Abstract
α-Klotho (Klotho) is an antiaging hormone with anti-inflammatory and antioxidative properties. Some studies suggest that Klotho increases in response to enhanced oxidative damage and inflammation. Alcoholism is a proinflammatory condition. The aim of this study was to analyze the relationship between Klotho and the serum levels of the inflammatory markers in alcoholic liver disease and to assess its prognostic value. We included 184 alcoholics and 35 age- and sex-matched controls. We determined the serum levels of Klotho, the tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-8, and malondialdehyde (MDA), and routine laboratory variables. Patients were followed-up with during 16 ± 18 months; 67 patients died. Klotho levels were higher among cirrhotics (with KW = 37.00 and p < 0.001) and were related to the Child−Pugh score (with KW = 15.96 and p < 0.001) and to the TNF-α (ρ = 0.28; p < 0.001) and MDA (ρ = 0.21; p = 0.006). The child’s groups were associated with mortality, both in the univariate (with the log-rank = 13.56, p = 0.001, Breslow = 12.33, and p = 0.002) and multivariate (with β = 0.43, p = 0.02, and OR = 1.53 (1.07−2.15)) analyses, also introducing Klotho and the TNF-α as dichotomic variables. However, the independent prognostic value of the Child’s groups was displaced by Klotho when only cirrhotics were considered; Klotho, over the median (574.4 pg/mL), was associated with higher mortality (with p = 0.04 and OR = 2.68 (1.06−6.84)). We conclude that Klotho is increased in liver cirrhosis. It is directly related to TNF-α, MDA, and to mortality in cirrhotics.
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Affiliation(s)
- Candelaria Martín-González
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Elisa Espelosín-Ortega
- Servicio de Laboratorio, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Pedro Abreu-González
- Departamento de Ciencias Médicas Básicas, Unidad de Fisiología, Universidad de la Laguna, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Camino Fernández-Rodríguez
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Víctor Eugenio Vera-Delgado
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Lourdes González-Navarrete
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Alen García-Rodríguez
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Antonio Martínez Riera
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
| | - Emilio González-Reimers
- Departamento de Medicina Interna, Universidad de La Laguna, Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife, Canary Islands, 38320 La Laguna, Spain
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Pathare G, Raju S, Mashru M, Shah V, Shalia K. Gene expression of klotho & antioxidative enzymes in peripheral blood mononuclear cells of essential hypertension patients in Indian population. Indian J Med Res 2021; 152:607-613. [PMID: 34145100 PMCID: PMC8224152 DOI: 10.4103/ijmr.ijmr_2112_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background & objectives: Oxidative stress is known to have a causal role in hypertension. Klotho has emerged as a novel anti-aging molecule to inhibit oxidative stress at cellular level. This study aimed at evaluating the gene expression of klotho and antioxidative enzymes, manganese superoxide dismutase (Mn-SOD) and catalase, in peripheral blood mononuclear cells of essential hypertensive patients as compared to normotensive healthy controls. Methods: Ninety-nine newly diagnosed hypertensives and 103 age- and BMI-matched controls were recruited. The participants were non-diabetic and not on any medication. Soluble α-klotho levels were detected using enzyme-linked immunosorbent assay. Gene expression was evaluated by quantitative real-time polymerase chain reaction. Results: Soluble α-klotho levels were significantly lower (27%, P=0.001) in patients as compared to controls. The trend remained same when compared against 44 out of 103 controls considered for gene expression analysis. Relative gene expression of klotho and catalase were 3-fold and 1.25-fold lower in patients as compared to controls, respectively. ΔCt value-based gene expression were also significantly lower for both genes (P=0.001). A decreasing but non-significant trend was observed for Mn-SOD gene expression. ΔCt value-based gene expression of catalase positively correlated with that of Mn-SOD in patient (rs=0.448) and control (rs=0.547) groups (P<0.001). In patients, the gene expression of Klotho positively correlated with that of catalase (rs=0.498, P=0.001), but not Mn-SOD (rs=0.155, P=0.126). Interpretation & conclusions: In the present study on newly diagnosed hypertensives, klotho and catalase gene expression were found to be significantly lower as compared to controls, indicating the role of oxidative stress in this patient group. In addition, a significant correlation between Klotho and catalase gene expression suggests a role for klotho in essential hypertension with respect to antioxidant defence.
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Affiliation(s)
- Gauri Pathare
- Department of Biochemistry, Sir H.N. Medical Research Society, Mumbai, Maharashtra, India
| | - Sunila Raju
- Department of Biochemistry, Sir H.N. Medical Research Society, Mumbai, Maharashtra, India
| | - Manoj Mashru
- Department of Cardiology, Sir H.N. Reliance Foundation Hospital & Research Center, Mumbai, Maharashtra, India
| | - Vinod Shah
- Department of Cardiology, Sir H.N. Reliance Foundation Hospital & Research Center, Mumbai, Maharashtra, India
| | - Kavita Shalia
- Department of Biochemistry, Sir H.N. Medical Research Society, Mumbai, Maharashtra, India
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Sequencing Analysis of mRNA Profile in Endothelial Cells in Response to ox-LDL. Biochem Genet 2021; 59:767-780. [PMID: 33528699 DOI: 10.1007/s10528-021-10028-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 01/06/2021] [Indexed: 10/22/2022]
Abstract
The pathogenesis of atherosclerosis (AS) and abnormal endothelial cells apoptosis is a multifactorial biological process. Oxidized low density lipoprotein (ox-LDL) is a critical factor in the formation of AS. However, the exact mechanism is still not clear. Therefore, the aim of this study was to investigate some genes and biological pathways in endothelial cells apoptosis in response to ox-LDL. First, our results has validated that ox-LDL is an effective inducer of endothelial cells apoptosis, then, transcriptome sequencing was used to detect differential expression genes. In total, 71 differentially expressed genes (DEGs) were identified, including 32 upregulated genes and 39 downregulated genes. GO analysis showed that DEGs were mainly enriched in cytokine-mediated signaling pathway, gene expression, external side of plasma membrane, steroid binding, and signaling receptor binding. After KEGG analysis, the DEGs mainly focused on the following biochemical signaling pathways, including Signaling molecules and interaction (such as ICOSLG, IL6, ITGAM, TNFRSF13C and VTCN1), Signal transduction (such as IL13RA2, IL6, ITGAM, PDE5A, SGK3 and TNFRSF13C), Immune system (such as FCGR2A, ICOSLG, IL6, ITGAM and TNFRSF13C), and so on. These genes may play a dominant role in HAECs apoptosis and AS genesis. The above prediction and analysis provide an important basis for our follow-up study of the mechanism of these genes, which might be used as molecular targets or diagnostic biomarkers for AS.
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da Paz Oliveira G, Elias RM, Peres Fernandes GB, Moyses R, Tufik S, Bichuetti DB, Coelho FMS. Decreased concentration of klotho and increased concentration of FGF23 in the cerebrospinal fluid of patients with narcolepsy. Sleep Med 2020; 78:57-62. [PMID: 33385780 DOI: 10.1016/j.sleep.2020.11.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 11/24/2020] [Accepted: 11/29/2020] [Indexed: 12/25/2022]
Abstract
OBJECTIVE to explore the status of concentration of klotho and fibroblast growth factor 23 (FGF23) in cerebrospinal fluid (CSF) of patients with narcolepsy. PATIENTS/METHODS 59 patients with narcolepsy and 17 control individuals were enrolled. We used radioimmunoassay, human klotho enzyme-linked immunosorbent assay (ELISA), human intact FGF23 ELISA and spectrophotometry to measure hypocretin-1, klotho, FGF-23 and phosphorus, respectively. T-Student Test was used to compare klotho and phosphate concentrations, Mann-Whitney U Test were used to compare FGF-23 levels between groups. ANOVA Test was used to compare klotho and phosphate CSF concentrations among narcolepsy patients with CSF hypocretin-1 <110 pg/ml (HCRT-) and narcolepsy patients with CSF hypocretin-1 >110 pg/ml (HCRT+) versus control subjects. RESULTS Klotho and phosphorus CSF levels were lower in narcoleptic patients than in control (908.18 ± 405.51 versus 1265.78 ± 523.26 pg/ml; p = 0.004 and 1.34 ± 0.25 versus 1.58 ± 0.23 mg/dl; p = 0.001, respectively). We found higher FGF-23 levels in narcoleptic patients (5.51 versus 4.00 pg/mL; p = 0.001). Klotho and phosphorus CSF levels were lower in both HCRT- and HCRT+ than controls. Moreover, there were higher FGF-23 levels in both HCRT-/HCRT+ groups versus controls. However, we did not find differences comparing HCRT- and HCRT+ groups, analyzing CSF klotho, FGF-23 or phosphorus levels. CONCLUSIONS Patients with narcolepsy have decreased CSF concentration of klotho and increased CSF levels of FGF-23. These findings may play a role in understanding the pathogenesis of narcolepsy.
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Affiliation(s)
- Giuliano da Paz Oliveira
- Disciplina de Neurologia, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-UNIFESP), São Paulo, SP, Brazil; Universidade Federal do Piauí (UFPI), Campus Ministro Reis Velloso, Parnaíba, PI, Brazil
| | - Rosilene Motta Elias
- Disciplina de Nefrologia, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | | | - Rosa Moyses
- Disciplina de Nefrologia, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Sergio Tufik
- Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Denis Bernardi Bichuetti
- Disciplina de Neurologia, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-UNIFESP), São Paulo, SP, Brazil
| | - Fernando Morgadinho Santos Coelho
- Disciplina de Neurologia, Escola Paulista de Medicina, Universidade Federal de São Paulo (EPM-UNIFESP), São Paulo, SP, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
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Lanzani C, Citterio L, Vezzoli G. Klotho: a link between cardiovascular and non-cardiovascular mortality. Clin Kidney J 2020; 13:926-932. [PMID: 33391735 PMCID: PMC7769552 DOI: 10.1093/ckj/sfaa100] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 05/08/2020] [Indexed: 12/22/2022] Open
Abstract
Klotho is a membrane-bound protein acting as an obligatory coreceptor for fibroblast growth factor 23 (FGF23) in the kidney and parathyroid glands. The extracellular portion of its molecule may be cleaved and released into the blood and produces multiple endocrine effects. Klotho exerts anti-inflammatory and antioxidative activities that may explain its ageing suppression effects evidenced in mice; it also modulates mineral metabolism and FGF23 activities and limits their negative impact on cardiovascular system. Clinical studies have found that circulating Klotho is associated with myocardial hypertrophy, coronary artery disease and stroke and may also be involved in the pathogenesis of salt-sensitive hypertension with a mechanism sustained by inflammatory cytokines. As a consequence, patients maintaining high serum levels of Klotho not only show decreased cardiovascular mortality but also non-cardiovascular mortality. Klotho genetic polymorphisms may influence these clinical relationships and predict cardiovascular risk; rs9536314 was the polymorphism most frequently involved in these associations. These findings suggest that Klotho and its genetic polymorphisms may represent a bridge between inflammation, salt sensitivity, hypertension and mortality. This may be particularly relevant in patients with chronic kidney disease who have decreased Klotho levels in tissues and blood.
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Affiliation(s)
- Chiara Lanzani
- Nephrology and Dialysis Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Genomics of Renal Diseases and Hypertension Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Lorena Citterio
- Genomics of Renal Diseases and Hypertension Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giuseppe Vezzoli
- Nephrology and Dialysis Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Genomics of Renal Diseases and Hypertension Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Vita-Salute San Raffaele University, Milan, Italy
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12
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Wolf EJ, Logue MW, Zhao X, Daskalakis NP, Morrison FG, Escarfulleri S, Stone A, Schichman SA, McGlinchey RE, Milberg WP, Chen C, Abraham CR, Miller MW. PTSD and the klotho longevity gene: Evaluation of longitudinal effects on inflammation via DNA methylation. Psychoneuroendocrinology 2020; 117:104656. [PMID: 32438247 PMCID: PMC7293549 DOI: 10.1016/j.psyneuen.2020.104656] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 03/04/2020] [Accepted: 03/18/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Longevity gene klotho (KL) is associated with age-related phenotypes including lifespan, cardiometabolic disorders, cognition, and brain morphology, in part, by conferring protection against inflammation. We hypothesized that the KL/inflammation association might be altered in the presence of psychiatric stress and operate via epigenetic pathways. We examined KL polymorphisms, and their interaction with posttraumatic stress disorder (PTSD) symptoms, in association with KL DNA methylation in blood. We further examined KL DNA methylation as a predictor of longitudinal changes in a peripheral biomarker of inflammation (C-reactive protein; CRP). METHODS The sample comprised 309 white non-Hispanic military veterans (93.5 % male; mean age: 32 years, range: 19-65; 30 % PTSD per structured diagnostic interview); 111 were reassessed approximately two years later. RESULTS Analyses revealed a methylation quantitative trait locus at rs9527025 (C370S, previously implicated in numerous studies of aging) in association with a Cytosine-phosphate-Guanine site (cg00129557; B = -.65, p = 1.29 X 10-20), located within a DNase hypersensitivity site in the body of KL. There was also a rs9527025 x PTSD severity interaction (B = .004, p = .035) on methylation at this locus such that the minor allele was associated with reduced cg00129557 methylation in individuals with few or no PTSD symptoms while this effect was attenuated in those with elevated levels of PTSD. Path models revealed that methylation at cg00129557 was inversely associated with CRP over time (B = -.14, p = .005), controlling for baseline CRP. There was also an indirect effect of rs9527025 X PTSD on subsequent CRP via cg00129557 methylation (indirect B = -.002, p = .033). CONCLUSIONS Results contribute to our understanding of the epigenetic correlates of inflammation in PTSD and suggest that KL methylation may be a mechanism by which KL genotype confers risk vs. resilience to accelerated aging in those experiencing traumatic stress.
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Affiliation(s)
- Erika J. Wolf
- National Center for PTSD at VA Boston Healthcare System,Department of Psychiatry, Boston University School of Medicine
| | - Mark W. Logue
- National Center for PTSD at VA Boston Healthcare System,Department of Psychiatry, Boston University School of Medicine,Biomedical Genetics, Boston University School of Medicine
| | - Xiang Zhao
- National Center for PTSD at VA Boston Healthcare System,Department of Psychiatry, Boston University School of Medicine
| | | | - Filomene G. Morrison
- National Center for PTSD at VA Boston Healthcare System,Department of Psychiatry, Boston University School of Medicine
| | | | - Annjanette Stone
- Pharmacogenomics Analysis Laboratory, Research Service, Central Arkansas Veterans Healthcare System
| | - Steven A. Schichman
- Pharmacogenomics Analysis Laboratory, Research Service, Central Arkansas Veterans Healthcare System
| | - Regina E. McGlinchey
- Geriatric Research Educational and Clinical Center and Translational Research Center for TBI and Stress Disorders, VA Boston Healthcare System,Department of Psychiatry, Harvard Medical School
| | - William P. Milberg
- Geriatric Research Educational and Clinical Center and Translational Research Center for TBI and Stress Disorders, VA Boston Healthcare System,Department of Psychiatry, Harvard Medical School
| | - Cidi Chen
- Department of Biochemistry, Boston University School of Medicine
| | - Carmela R. Abraham
- Department of Biochemistry, Boston University School of Medicine,Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine
| | - Mark W. Miller
- National Center for PTSD at VA Boston Healthcare System,Department of Psychiatry, Boston University School of Medicine
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13
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Pauli N, Puchałowicz K, Kuligowska A, Krzystolik A, Dziedziejko V, Safranow K, Rać M, Chlubek D, Ewa Rać M. Associations between IL-6 and Echo-Parameters in Patients with Early Onset Coronary Artery Disease. Diagnostics (Basel) 2019; 9:E189. [PMID: 31739518 PMCID: PMC6963263 DOI: 10.3390/diagnostics9040189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 11/06/2019] [Accepted: 11/09/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Over the last two decades, many studies have investigated the association between interleukin 6 (IL-6) and pathogenesis and progression of coronary artery disease (CAD). Patients with CAD manifested at a young age are a particularly interesting group. They differ from older patients, not only in terms of the severity of coronary artery atherosclerosis, but also risk factor profiles, short- and long-term prognosis after myocardial infarction (MI). The role of IL-6 in younger patients with CAD is less well-known. Therefore, our study aimed to analyze the relationship between IL-6 level and other inflammations, atherosclerosis, and cardiac function parameters in early onset CAD patients. METHODS The study covered 100 patients with early onset CAD and a group of 50 healthy participants. Plasma levels of IL-6 and basic biochemical parameters, anthropometric, echocardiographic, and arteries Doppler ultrasound measurements were performed. RESULTS We did not observe a significant difference in IL-6 concentration in plasma between patients with early onset CAD and a control group, but IL-6 level was negatively correlated with echocardiographic measurements of ascending aorta diameter, left ventricular shortening fraction, and right ventricular end-diastolic diameter in our patients. CONCLUSIONS In patients with early onset CAD, plasma IL-6 level is associated with other inflammation parameters and with cardiac function, potentially contributing to right ventricular remodeling and left ventricular systolic dysfunction. This suggests possible prognostic benefits of long-time observation of IL-6 level after the acute coronary syndrome.
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Affiliation(s)
- Natalia Pauli
- Department of Cardiology, Regional Hospital, 66-400 Gorzow Wielkopolski, Poland;
| | - Kamila Puchałowicz
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.P.); (A.K.); (V.D.); (K.S.); (D.C.)
| | - Agnieszka Kuligowska
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.P.); (A.K.); (V.D.); (K.S.); (D.C.)
| | | | - Violetta Dziedziejko
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.P.); (A.K.); (V.D.); (K.S.); (D.C.)
| | - Krzysztof Safranow
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.P.); (A.K.); (V.D.); (K.S.); (D.C.)
| | - Michał Rać
- Department of Diagnostic Imaging and Interventional Radiology, Pomeranian Medical University, 71-252 Szczecin, Poland;
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.P.); (A.K.); (V.D.); (K.S.); (D.C.)
| | - Monika Ewa Rać
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.P.); (A.K.); (V.D.); (K.S.); (D.C.)
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14
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Pákó J, Kunos L, Mészáros M, Tárnoki DL, Tárnoki ÁD, Horváth I, Bikov A. Decreased Levels of Anti-Aging Klotho in Obstructive Sleep Apnea. Rejuvenation Res 2019; 23:256-261. [PMID: 31094281 DOI: 10.1089/rej.2019.2183] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The klotho protein is secreted primarily by the kidneys. It is responsible for phosphate homeostasis and has an anti-aging, anti-inflammatory, and anti-oxidative stress role. Obstructive sleep apnea (OSA) is associated with an enhanced systemic inflammation and oxidative stress, but mechanisms that regulate these processes are poorly understood. The aim of the study was to investigate the plasma levels of klotho in OSA. Twenty-one previously untreated patients with OSA (56 ± 13 years, 12 males) and 41 non-OSA control volunteers (48 ± 16 years, 8 males) participated in the study. Medical history has been taken; participants filled out the Epworth Sleepiness Scale. C-reactive protein and renal function, glucose and lipid profile measurements were performed in sera; klotho was determined in citrate-treated plasma samples. Levels of plasma klotho were decreased in OSA (519.1 ± 164.9 pg/mL) versus controls (700.8 ± 431.4 pg/mL, p = 0.02). Reduced klotho concentrations were associated with markers of overnight hypoxemia determined with O2 desaturation index (r = -0.31, p = 0.01), percentage of sleep time spent with saturation <90% (r = -0.41, p < 0.01), and minimal saturation during sleep (r = 0.33, p = 0.01). Interestingly, there was no relationship with apnea-hypopnea index, total sleep time, or arousal index (all p > 0.05). Significant association was also found between low plasma klotho levels and the presence of hypertension (p < 0.05). Our results suggest that chronic intermittent hypoxia reduces the levels of klotho in OSA, which may contribute to the development of hypertension. Decreased klotho levels may play a role in enhanced systemic inflammation in OSA and may be a future target for drug development.
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Affiliation(s)
- Judit Pákó
- Department of Pathophysiology, National Koranyi Institute for Pulmonology, Budapest, Hungary
| | - László Kunos
- Department of Pulmonology, Semmelweis University, Budapest, Hungary
| | - Martina Mészáros
- Department of Pulmonology, Semmelweis University, Budapest, Hungary
| | | | | | - Ildikó Horváth
- Department of Pathophysiology, National Koranyi Institute for Pulmonology, Budapest, Hungary
| | - András Bikov
- Department of Pulmonology, Semmelweis University, Budapest, Hungary.,Manchester Clinical Research Facility, Manchester University NHS Foundation Trust, Manchester, United Kingdom
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15
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Martín-González C, González-Reimers E, Quintero-Platt G, Martínez-Riera A, Santolaria-Fernández F. Soluble α-Klotho in Liver Cirrhosis and Alcoholism. Alcohol Alcohol 2019; 54:204-208. [PMID: 30860544 DOI: 10.1093/alcalc/agz019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 02/21/2019] [Indexed: 11/13/2022] Open
Abstract
AIMS AND BACKGROUND Alpha Klotho is a transmembrane protein that serves as co-receptor for FGF23. Ectodomain of membrane bound α Klotho may be shed by membrane bound proteases (activated, among other factors, by tumor necrosis factor (TNF)-α) generating the soluble form of the protein (sKl) that functions as a hormone by itself. It modulates calcium influx into cells, blunts IGF-1/Insulin signaling, promotes synthesis of antioxidants, generally slows down tumor progression, delays cell senescence, is neuroprotective and promotes oligodendrocyte maturation and myelin synthesis, and muscle rejuvenation. It may be involved in inflammation and exerts antifibrogenic effects. Some of these pathways may become altered in alcoholism or liver cirrhosis, but data are scattered and scarce and an update is required. METHOD Literature survey. RESULTS AND CONCLUSIONS Alcohol consumption in non-alcoholics is inversely related to sKl, but alcoholic cirrhotics showed higher-than-normal sKl values in association with liver function derangement. In hepatoma cells, the intensity of Klotho staining was related to faster tumor progression and a shortened life span. Among severe alcoholic cirrhotics sKl is directly related to serum TNF-α levels, and, inversely, to brain atrophy. Given the antioxidant, anti-inflammatory, and antifibrogenic effects of Klotho, perhaps the increase in cirrhosis (and in other inflammatory conditions, such as sepsis or cancer) reflects an attempt to regulate increased inflammation, but clinical and experimental research is urgently needed in this field.
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Affiliation(s)
- C Martín-González
- Servicio de Medicina Interna. Hospital Universitario de Canarias. Universidad de La Laguna. Tenerife, Canary Islands, Spain
| | - E González-Reimers
- Servicio de Medicina Interna. Hospital Universitario de Canarias. Universidad de La Laguna. Tenerife, Canary Islands, Spain
| | - G Quintero-Platt
- Servicio de Medicina Interna. Hospital Universitario de Canarias. Universidad de La Laguna. Tenerife, Canary Islands, Spain
| | - A Martínez-Riera
- Servicio de Medicina Interna. Hospital Universitario de Canarias. Universidad de La Laguna. Tenerife, Canary Islands, Spain
| | - F Santolaria-Fernández
- Servicio de Medicina Interna. Hospital Universitario de Canarias. Universidad de La Laguna. Tenerife, Canary Islands, Spain
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16
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Kan WC, Hwang JY, Chuang LY, Guh JY, Ye YL, Yang YL, Huang JS. Effect of osthole on advanced glycation end products-induced renal tubular hypertrophy and role of klotho in its mechanism of action. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 53:205-212. [PMID: 30668400 DOI: 10.1016/j.phymed.2018.09.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 08/13/2018] [Accepted: 09/03/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Osthole has been widely reported to have pharmacological activities such as anti-cancer, anti-inflammation and anti-hyperlipidemic effects. Klotho was identified as an anti-senescence protein in a variety of tissues. Loss of klotho has been associated with chronic kidney disease. However, potential roles and molecular events for osthole and klotho in diabetic nephropathy remain unclear. PURPOSE In the current study, we undertook to study the effect of osthole on klotho expression in advanced glycation end products (AGE)-cultured human renal proximal tubular cells, and to investigate the molecular mechanisms of osthole and exogenous klotho against AGE-induced renal tubular hypertrophy. METHODS Cell viability was elucidated by MTT assay. Protein expression was measured by Western blotting. mRNA level was analyzed by real-time PCR. Cellular hypertrophy growth was evaluated by hypertrophy index. Relative cell size was detected by flow cytometry. RESULTS We found that raising the ambient AGE concentration causes a dose-dependent decrease in klotho synthesis. Osthole significantly increased AGE-inhibited klotho mRNA and protein expression. Osthole and exogenous klotho treatments significantly attenuated AGE-induced Janus kinase 2 (JAK2)-signal transducers and activators of transcription 1 (STAT1) and STAT3 activation. Moreover, protein levels of suppressor of cytokine signaling 1 (SOCS1) and SOCS3 were augmented by osthole and exogenous klotho. The abilities of osthole and exogenous klotho to reverse AGE-induced cellular hypertrophy were verified by the observation that osthole and exogenous klotho inhibited p21Waf1/Cip1/collagen IV/RAGE expression, total protein content, and cell size. CONCLUSION Consequently, we found that osthole attenuated AGE-induced renal tubular hypertrophy via induction of klotho expression and suppression of the JAK2-STAT1/STAT3 signaling. These results also showed that klotho might be used as a unique molecular target for the treatment of diabetic nephropathy.
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Affiliation(s)
- Wei-Chih Kan
- Division of Nephrology, Department of Internal Medicine, Chi-Mei Medical Center, Tainan, Taiwan
| | - Jean-Yu Hwang
- Department of Food Nutrition, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Lea-Yea Chuang
- Department of Biochemistry, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jinn-Yuh Guh
- Department of Internal Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Ling Ye
- Department of Biotechnology, National Formosa University, Yunlin, Taiwan
| | - Yu-Lin Yang
- Department of Medical Laboratory Science and Biotechnology, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Jau-Shyang Huang
- Department of Biomedicine and Health Science, Chung Hwa University of Medical Technology, 89, Wen-Hwa 1st St. Rende Dist., Tainan 71703, Taiwan.
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17
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González-Reimers E, Romero-Acevedo L, Espelosín-Ortega E, Martín-González MC, Quintero-Platt G, Abreu-González P, José de-la-Vega-Prieto M, Martínez-Martínez D, Santolaria-Fernández F. Soluble Klotho and Brain Atrophy in Alcoholism. Alcohol Alcohol 2018; 53:503-510. [PMID: 29846497 DOI: 10.1093/alcalc/agy037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 05/12/2018] [Indexed: 12/20/2022] Open
Abstract
Aim Fibroblast growth factor (FGF-23) and α-Klotho (Klotho) levels may be altered in inflammatory conditions, possibly as compensatory mechanisms. Klotho exerts a protective effect on neurodegeneration and improves learning and cognition. No data exist about the association of Klotho and FGF-23 levels with brain atrophy observed in alcoholics. The aim of this study is to explore these relationships. Short summary FGF-23 and Klotho levels are altered in inflammation, possibly as compensatory mechanisms. Klotho enhances learning, but its role in ethanol-mediated brain atrophy is unknown. We found higher FGF-23 and lower Klotho levels in 131 alcoholics compared with 41 controls. Among cirrhotics, Klotho was higher and inversely related to brain atrophy. Methods The study was performed on 131 alcoholic patients (54 cirrhotics) and 41 age- and sex-matched controls, in whom a brain computed tomography (CT) was performed and several indices were calculated. Results Marked brain atrophy was observed among patients when compared with controls. Patients also showed higher FGF-23 and lower Klotho values. However, among cirrhotics, Klotho values were higher. Klotho was inversely related to brain atrophy (for instance, ventricular index (ρ = -0.23, P = 0.008)), especially in cirrhotics. Klotho was also directly related to tumor necrosis factor (TNF) alpha (ρ = 0.22; P = 0.026) and inversely to transforming growth factor (TGF)-β (ρ = -0.34; P = 0.002), but not to C-reactive protein (CRP) or malondialdehyde levels. FGF-23 was also higher among cirrhotics but showed no association with CT indices. Conclusions Klotho showed higher values among cirrhotics, and was inversely related to brain atrophy. FGF-23, although high among patients, especially cirrhotics, did not show any association with brain atrophy. Some inflammatory markers or cytokines, such as CRP or TGF-β were related to brain atrophy.
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Affiliation(s)
| | - Lucía Romero-Acevedo
- Servicio de Medicina Interna, Universidad de La Laguna, Tenerife, Canary Islands, Spain
| | | | | | | | - Pedro Abreu-González
- Departamento de Fisiología, Hospital Universitario de Canarias, Universidad de La Laguna, Tenerife, Canary Islands, Spain
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18
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Pan HC, Chou KM, Lee CC, Yang NI, Sun CY. Circulating Klotho levels can predict long-term macrovascular outcomes in type 2 diabetic patients. Atherosclerosis 2018; 276:83-90. [PMID: 30048945 DOI: 10.1016/j.atherosclerosis.2018.07.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 06/11/2018] [Accepted: 07/05/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIMS Type 2 diabetes is a global health problem that is associated with a wide variety of vascular complications and associated morbidity and mortality. Klotho is an enzyme and transmembrane protein, and increasing evidence suggests that Klotho may contribute to reduced oxidative stress, improved endothelial function, and vasoprotection. To date, the physiological role of Klotho in vascular complications associated with diabetes is unclear. METHODS We prospectively recruited 252 patients with type 2 diabetes, who visited an outpatient clinic at our hospital between 2009 and 2011. Patients in the top and bottom tertiles of circulating Klotho levels were enrolled for analysis. RESULTS Of the 168 patients enrolled, 45.8% were male, the mean age was 57.2 years, and the average duration of diabetes was 7.58 years. In multiple regression analysis, a high Klotho level was associated with a reduced risk of developing coronary artery disease and cerebrovascular accidents. Klotho level was also an independent predictor for the development of macroangiopathies within the 7-year study period. CONCLUSIONS Our results suggest that circulating Klotho level is a predictor of long-term macrovascular outcomes in patients with type 2 diabetes.
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Affiliation(s)
- Heng-Chih Pan
- Division of Nephrology, Department of Internal Medicine, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Kuei-Mei Chou
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chin-Chan Lee
- Division of Nephrology, Department of Internal Medicine, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan; Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Ning-I Yang
- Chang Gung University College of Medicine, Taoyuan, Taiwan; Division of Cardiology, Department of Internal Medicine, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chiao-Yin Sun
- Division of Nephrology, Department of Internal Medicine, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan; Chang Gung University College of Medicine, Taoyuan, Taiwan.
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19
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Hoyer C, Sartorius A, Aksay SS, Bumb JM, Janke C, Thiel M, Haffner D, Leifheit-Nestler M, Kranaster L. Electroconvulsive therapy enhances the anti-ageing hormone Klotho in the cerebrospinal fluid of geriatric patients with major depression. Eur Neuropsychopharmacol 2018; 28:428-435. [PMID: 29274997 DOI: 10.1016/j.euroneuro.2017.12.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 10/25/2017] [Accepted: 12/06/2017] [Indexed: 02/06/2023]
Abstract
Klotho is a humoral factor with pleiotropic effects. Most notably, Klotho deficiency is associated with a phenotype comprising organ manifestations accompanying aging including atherosclerosis and cognitive impairment. Research on the role of Klotho in affective disorder is scarce, which is surprising in light of the fact that depression is associated with accelerated cellular aging as well as aging-related phenotypes and comorbidity observed in Klotho deficiency. On these grounds we investigated Klotho levels in the cerebrospinal fluid (CSF) and serum of eight geriatric patients undergoing electroconvulsive therapy (ECT) for severe depression. We hypothesize that ECT as a highly effective antidepressant treatment leads enhances Klotho levels. We found a significant difference between pre- and post-ECT CSF Klotho (792.5pg/ml vs. 991.3pg/ml, p=0.0020), but no difference in serum Klotho (602.5 vs. 594.3, p=0.32). Moreover, CSF Klotho increase positively correlated with the number of single ECT sessions that were performed in each patient (F1, 6)=7.84, p=0.031). Conjointly, the results of our exploratory study with a small sample size suggest a central nervous system-specific impact of ECT on Klotho, which may in turn partake in mediating the antidepressant effect of ECT. We suggest the modulation of neuroinflammatory processes, which have been ascribed pathophysiological relevance within the conceptual framework of the neuroinflammation hypothesis of depression, through ECT as a potential mechanism by which Klotho is enhanced in response to treatment. Further preclinical and clinical investigation should aim for a precise identification of the role of Klotho in depressive disorder.
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Affiliation(s)
- Carolin Hoyer
- Department of Neurology, University Medical Centre Mannheim, Mannheim, Germany
| | - Alexander Sartorius
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Suna Su Aksay
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Jan Malte Bumb
- Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Christoph Janke
- Department of Anesthesiology and Critical Care Medicine, University Medical Centre Mannheim, Mannheim, Germany
| | - Manfred Thiel
- Department of Anesthesiology and Critical Care Medicine, University Medical Centre Mannheim, Mannheim, Germany
| | - Dieter Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - Maren Leifheit-Nestler
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - Laura Kranaster
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany.
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20
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Zhou HJ, Li H, Shi MQ, Mao XN, Liu DL, Chang YR, Gan YM, Kuang X, Du JR. Protective Effect of Klotho against Ischemic Brain Injury Is Associated with Inhibition of RIG-I/NF-κB Signaling. Front Pharmacol 2018; 8:950. [PMID: 29403373 PMCID: PMC5778393 DOI: 10.3389/fphar.2017.00950] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 12/14/2017] [Indexed: 01/19/2023] Open
Abstract
Aging is the greatest independent risk factor for the occurrence of stroke and poor outcomes, at least partially through progressive increases in oxidative stress and inflammation with advanced age. Klotho is an antiaging gene, the expression of which declines with age. Klotho may protect against neuronal oxidative damage that is induced by glutamate. The present study investigated the effects of Klotho overexpression and knockdown by an intracerebroventricular injection of a lentiviral vector that encoded murine Klotho (LV-KL) or rat Klotho short-hairpin RNA (LV-KL shRNA) on cerebral ischemia injury and the underlying anti-neuroinflammatory mechanism. The overexpression of Klotho induced by LV-KL significantly improved neurobehavioral deficits and increased the number of live neurons in the hippocampal CA1 and caudate putamen subregions 72 h after cerebral hypoperfusion that was induced by transient bilateral common carotid artery occlusion (2VO) in mice. The overexpression of Klotho significantly decreased the immunoreactivity of glial fibrillary acidic protein and ionized calcium binding adaptor molecule-1, the expression of retinoic-acid-inducible gene-I, the nuclear translocation of nuclear factor-κB, and the production of proinflammatory cytokines (tumor necrosis factor α and interleukin-6) in 2VO mice. The knockdown of Klotho mediated by LV-KL shRNA in the brain exacerbated neurological dysfunction and cerebral infarct after 22 h of reperfusion following 2 h middle cerebral artery occlusion in rats. These findings suggest that Klotho itself or enhancers of Klotho may compensate for its aging-related decline, thus providing a promising therapeutic approach for acute ischemic stroke during advanced age.
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Affiliation(s)
- Hong-Jing Zhou
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Hui Li
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Meng-Qi Shi
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Xiao-Na Mao
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Dong-Ling Liu
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Yi-Ran Chang
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Yu-Miao Gan
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Xi Kuang
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Jun-Rong Du
- Department of Pharmacology, Key Laboratory of Drug Targeting and Drug Delivery System, West China School of Pharmacy, Sichuan University, Chengdu, China
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21
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Guo Y, Zhuang X, Huang Z, Zou J, Yang D, Hu X, Du Z, Wang L, Liao X. Klotho protects the heart from hyperglycemia-induced injury by inactivating ROS and NF-κB-mediated inflammation both in vitro and in vivo. Biochim Biophys Acta Mol Basis Dis 2017; 1864:238-251. [PMID: 28982613 DOI: 10.1016/j.bbadis.2017.09.029] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 09/10/2017] [Accepted: 09/28/2017] [Indexed: 12/23/2022]
Abstract
Cardiac inflammation and oxidative stress play a key role in the pathogenesis of diabetic cardiomyopathy (DCM). The anti-aging protein Klotho has been found to protect cells from inflammation and oxidative stress. The current study aimed to explore the cardioprotective effects of Klotho on DCM and the underlying mechanisms. H9c2 cells and neonatal cardiomyocytes were incubated with 33mM glucose in the presence or absence of Klotho. Klotho pretreatment effectively inhibited high glucose-induced inflammation, ROS generation, apoptosis, mitochondrial dysfunction, fibrosis and hypertrophy in both H9c2 cells and neonatal cardiomyocytes. In STZ-induced type 1 diabetic mice, intraperitoneal injection of Klotho at 0.01mg/kg per 48h for 3months completely suppressed cardiac inflammatory cytokines and oxidative stress and prevented cardiac cell death and remodeling, which subsequently improved cardiac dysfunction without affecting hyperglycemia. This study revealed that Klotho may exert its protective effects by augmenting nuclear factor erythroid 2-related factor 2 (Nrf2) expression and inactivating nuclear factor κB (NF-κB) activation both in vitro and in vivo. Thus, this work demonstrated for the first time that the anti-aging protein Klotho may be a potential therapeutic agent to treat DCM by inhibiting oxidative stress and inflammation. We also demonstrated the critical roles of the Nrf2 and NF-κB pathways in diabetes-stimulated cardiac injuries and indicated that they may be key therapeutic targets for diabetic complications.
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Affiliation(s)
- Yue Guo
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China; Key Laboratory of Assisted Circulation, Ministry of Health, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, PR China
| | - Xiaodong Zhuang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Zena Huang
- Department of Critical Care Medicine and Emergency, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
| | - Jing Zou
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510630, PR China
| | - Daya Yang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Xun Hu
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Zhimin Du
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China
| | - Lichun Wang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China; Key Laboratory of Assisted Circulation, Ministry of Health, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, PR China.
| | - Xinxue Liao
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, PR China; Key Laboratory of Assisted Circulation, Ministry of Health, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, PR China.
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22
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Olauson H, Mencke R, Hillebrands JL, Larsson TE. Tissue expression and source of circulating αKlotho. Bone 2017; 100:19-35. [PMID: 28323144 DOI: 10.1016/j.bone.2017.03.043] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 12/16/2022]
Abstract
αKlotho (Klotho), a type I transmembrane protein and a coreceptor for Fibroblast Growth Factor-23, was initially thought to be expressed only in a limited number of tissues, most importantly the kidney, parathyroid gland and choroid plexus. Emerging data may suggest a more ubiquitous Klotho expression pattern which has prompted reevaluation of the restricted Klotho paradigm. Herein we systematically review the evidence for Klotho expression in various tissues and cell types in humans and other mammals, and discuss potential reasons behind existing conflicting data. Based on current literature and tissue expression atlases, we propose a classification of tissues into high, intermediate and low/absent Klotho expression. The functional relevance of Klotho in organs with low expression levels remain uncertain and there is currently limited data on a role for membrane-bound Klotho outside the kidney. Finally, we review the evidence for the tissue source of soluble Klotho, and conclude that the kidney is likely to be the principal source of circulating Klotho in physiology.
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Affiliation(s)
- Hannes Olauson
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.
| | - Rik Mencke
- Division of Pathology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jan-Luuk Hillebrands
- Division of Pathology, Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Tobias E Larsson
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
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23
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Mencke R, Hillebrands JL. The role of the anti-ageing protein Klotho in vascular physiology and pathophysiology. Ageing Res Rev 2017; 35:124-146. [PMID: 27693241 DOI: 10.1016/j.arr.2016.09.001] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/23/2016] [Indexed: 02/08/2023]
Abstract
Klotho is an anti-ageing protein that functions in many pathways that govern ageing, like regulation of phosphate homeostasis, insulin signaling, and Wnt signaling. Klotho expression levels and levels in blood decline during ageing. The vascular phenotype of Klotho deficiency features medial calcification, intima hyperplasia, endothelial dysfunction, arterial stiffening, hypertension, and impaired angiogenesis and vasculogenesis, with characteristics similar to aged human arteries. Klotho-deficient phenotypes can be prevented and rescued by Klotho gene expression or protein supplementation. High phosphate levels are likely to be directly pathogenic and are a prerequisite for medial calcification, but more important determinants are pathways that regulate cellular senescence, suggesting that deficiency of Klotho renders cells susceptible to phosphate toxicity. Overexpression of Klotho is shown to ameliorate medial calcification, endothelial dysfunction, and hypertension. Endogenous vascular Klotho expression is a controversial subject and, currently, no compelling evidence exists that supports the existence of vascular membrane-bound Klotho expression, as expressed in kidney. In vitro, Klotho has been shown to decrease oxidative stress and apoptosis in both SMCs and ECs, to reduce SMC calcification, to maintain the contractile SMC phenotype, and to prevent μ-calpain overactivation in ECs. Klotho has many protective effects with regard to the vasculature and constitutes a very promising therapeutic target. The purpose of this review is to explore the etiology of the vascular phenotype of Klotho deficiency and the therapeutic potential of Klotho in vascular disease.
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