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Yang N, Zhang Y, Ren P, Zhao L, Zheng D, Fu L, Jin J. LncRNA AA465934 Improves Podocyte Injury by Promoting Tristetraprolin-Mediated HMGB1 DownRegulation in Diabetic Nephropathy. Mol Cell Biol 2024; 44:87-102. [PMID: 38520226 PMCID: PMC10986766 DOI: 10.1080/10985549.2024.2325527] [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: 11/08/2023] [Accepted: 02/26/2024] [Indexed: 03/25/2024] Open
Abstract
Although LncRNA AA465934 expression is reduced in high glucose (HG)-treated podocytes, its role in HG-mediated podocyte injury and diabetic nephropathy (DN) remains unknown. Herein, we investigated the role of AA465934 in HG-mediated podocyte injury and DN using a spontaneous type II diabetic nephropathy (T2DN) model. The model was created by injecting AA465934 overexpressed adeno-associated virus (AAV) or control into mice. The levels of renal function, proteinuria, renal structural lesions, and podocyte apoptosis were then examined. Furthermore, AA465934 and autophagy levels, as well as tristetraprolin (TTP) and high mobility group box 1 (HMGB1) expression changes were detected. We also observed podocyte injury and the binding ability of TTP to E3 ligase proviral insertion in murine lymphomas 2 (PIM2), AA465934, or HMGB1. According to the results, AA465934 improved DN progression and podocyte damage in T2DN mice. In addition, AA465934 bound to TTP and inhibited its degradation by blocking TTP-PIM2 binding. Notably, TTP knock-down blocked the ameliorating effects of AA465934 and TTP bound HMGB1 mRNA, reducing its expression. Overexpression of HMGB1 inhibited the ability of AA465934 and TTP to improve podocyte injury. Furthermore, AA465934 bound TTP, inhibiting TTP-PIM2 binding, thereby suppressing TTP degradation, downregulating HMGB1, and reversing autophagy downregulation, ultimately alleviating HG-mediated podocyte injury and DN. Based on these findings, we deduced that the AA465934/TTP/HMGB1/autophagy axis could be a therapeutic avenue for managing podocyte injury and DN.
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Affiliation(s)
- Nan Yang
- Postgraduate Training Base of Jinzhou Medical University (Zhejiang Provincial People’s Hospital), Jinzhou, Liaoning, China
| | - Yue Zhang
- The Medical College of Qingdao University, Qingdao, China
| | - Peiyao Ren
- Department of Nephrology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang, China
| | - Li Zhao
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People’s Hospital, Affiliated People’s Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Danna Zheng
- Urology & Nephrology Center, Department of Nephrology, Zhejiang Provincial People’s Hospital, Affiliated People’s Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Lanjun Fu
- Department of Nephrology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang, China
| | - Juan Jin
- Department of Nephrology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang, China
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Han X, Akinseye L, Sun Z. KDM6A Demethylase Regulates Renal Sodium Excretion and Blood Pressure. Hypertension 2024; 81:541-551. [PMID: 38164755 PMCID: PMC10922853 DOI: 10.1161/hypertensionaha.123.22026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 12/13/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND KDM6A (Lysine-Specific Demethylase 6A) is a specific demethylase for histone 3 lysine (K) 27 trimethylation (H3K27me3). The purpose of this study is to investigate whether KDM6A in renal tubule cells plays a role in the regulation of kidney function and blood pressure. METHODS We first crossed Ksp-Cre+/- and KDM6Aflox/flox mice for generating inducible kidney-specific deletion of KDM6A gene. RESULTS Notably, conditional knockout of KDM6A gene in renal tubule cells (KDM6A-cKO) increased H3K27me3 levels which leads to a decrease in Na excretion and elevation of blood pressure. Further analysis showed that the expression of NKCC2 (Na-K-2Cl cotransporter 2) and NCC (Na-Cl cotransporters) was upregulated which contributes to impaired Na excretion in KDM6A-cKO mice. The expression of AQP2 (aquaporin 2) was also increased in KDM6A-cKO mice, which may facilitate water reabsorption in KDM6A-cKO mice. The expression of Klotho was downregulated while expression of aging markers including p53, p21, and p16 was upregulated in kidneys of KDM6A-cKO mice, indicating that deletion of KDM6A in the renal tubule cells promotes kidney aging. Interestingly, KDM6A-cKO mice developed salt-sensitive hypertension which can be rescued by treatment with Klotho. KDM6A deficiency induced salt-sensitive hypertension likely through downregulation of the Klotho/ERK (extracellular signal-regulated kinase) signaling and upregulation of the WNK (with-no-lysine kinase) signaling. CONCLUSIONS This study provides the first evidence that KDM6A plays an essential role in maintaining normal tubular function and blood pressure. Renal tubule cell specific KDM6A deficiency causes hypertension due to increased H3K27me3 levels and the resultant downregulation of Klotho gene expression which disrupts the Klotho/ERK/NCC/NKCC2 signaling.
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Affiliation(s)
- Xiaobin Han
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Leah Akinseye
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Zhongjie Sun
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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3
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Kitaeva KV, Solovyeva VV, Blatt NL, Rizvanov AA. Eternal Youth: A Comprehensive Exploration of Gene, Cellular, and Pharmacological Anti-Aging Strategies. Int J Mol Sci 2024; 25:643. [PMID: 38203812 PMCID: PMC10778954 DOI: 10.3390/ijms25010643] [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: 11/08/2023] [Revised: 12/21/2023] [Accepted: 12/30/2023] [Indexed: 01/12/2024] Open
Abstract
The improvement of human living conditions has led to an increase in average life expectancy, creating a new social and medical problem-aging, which diminishes the overall quality of human life. The aging process of the body begins with the activation of effector signaling pathways of aging in cells, resulting in the loss of their normal functions and deleterious effects on the microenvironment. This, in turn, leads to chronic inflammation and similar transformations in neighboring cells. The cumulative retention of these senescent cells over a prolonged period results in the deterioration of tissues and organs, ultimately leading to a reduced quality of life and an elevated risk of mortality. Among the most promising methods for addressing aging and age-related illnesses are pharmacological, genetic, and cellular therapies. Elevating the activity of aging-suppressing genes, employing specific groups of native and genetically modified cells, and utilizing senolytic medications may offer the potential to delay aging and age-related ailments over the long term. This review explores strategies and advancements in the field of anti-aging therapies currently under investigation, with a particular emphasis on gene therapy involving adeno-associated vectors and cell-based therapeutic approaches.
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Affiliation(s)
- Kristina V. Kitaeva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (K.V.K.); (V.V.S.); (N.L.B.)
| | - Valeriya V. Solovyeva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (K.V.K.); (V.V.S.); (N.L.B.)
| | - Nataliya L. Blatt
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (K.V.K.); (V.V.S.); (N.L.B.)
| | - Albert A. Rizvanov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; (K.V.K.); (V.V.S.); (N.L.B.)
- Division of Medical and Biological Sciences, Tatarstan Academy of Sciences, 420111 Kazan, Russia
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4
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Rauckhorst AJ, Vasquez Martinez G, Mayoral Andrade G, Wen H, Kim JY, Simoni A, Robles-Planells C, Mapuskar KA, Rastogi P, Steinbach EJ, McCormick ML, Allen BG, Pabla NS, Jackson AR, Coleman MC, Spitz DR, Taylor EB, Zepeda-Orozco D. Tubular mitochondrial pyruvate carrier disruption elicits redox adaptations that protect from acute kidney injury. Mol Metab 2024; 79:101849. [PMID: 38056691 PMCID: PMC10733108 DOI: 10.1016/j.molmet.2023.101849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023] Open
Abstract
OBJECTIVE Energy-intensive kidney reabsorption processes essential for normal whole-body function are maintained by tubular epithelial cell metabolism. Although tubular metabolism changes markedly following acute kidney injury (AKI), it remains unclear which metabolic alterations are beneficial or detrimental. By analyzing large-scale, publicly available datasets, we observed that AKI consistently leads to downregulation of the mitochondrial pyruvate carrier (MPC). This investigation aimed to understand the contribution of the tubular MPC to kidney function, metabolism, and acute injury severity. METHODS We generated tubular epithelial cell-specific Mpc1 knockout (MPC TubKO) mice and employed renal function tests, in vivo renal 13C-glucose tracing, mechanistic enzyme activity assays, and tests of injury and survival in an established rhabdomyolysis model of AKI. RESULTS MPC TubKO mice retained normal kidney function, displayed unchanged markers of kidney injury, but exhibited coordinately increased enzyme activities of the pentose phosphate pathway and the glutathione and thioredoxin oxidant defense systems. Following rhabdomyolysis-induced AKI, compared to WT control mice, MPC TubKO mice showed increased glycolysis, decreased kidney injury and oxidative stress markers, and strikingly increased survival. CONCLUSIONS Our findings suggest that decreased renal tubular mitochondrial pyruvate uptake hormetically upregulates oxidant defense systems before AKI and is a beneficial adaptive response after rhabdomyolysis-induced AKI. This raises the possibility of therapeutically modulating the MPC to attenuate AKI severity.
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Affiliation(s)
- Adam J Rauckhorst
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA, USA; Fraternal Order of Eagles Diabetes Research Center (FOEDRC), University of Iowa, Iowa City, IA, USA; FOEDRC Metabolomics Core Research Facility, University of Iowa, Iowa City, IA, USA
| | - Gabriela Vasquez Martinez
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus OH, USA
| | - Gabriel Mayoral Andrade
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus OH, USA
| | - Hsiang Wen
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA
| | - Ji Young Kim
- Division of Pharmaceutics and Pharmacology, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Aaron Simoni
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus OH, USA
| | - Claudia Robles-Planells
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus OH, USA
| | - Kranti A Mapuskar
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Prerna Rastogi
- Department of Pathology, University of Iowa, Iowa City, IA, USA
| | - Emily J Steinbach
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA; Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Michael L McCormick
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Bryan G Allen
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Navjot S Pabla
- Division of Pharmaceutics and Pharmacology, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Ashley R Jackson
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus OH, USA; Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - Mitchell C Coleman
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA; Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
| | - Douglas R Spitz
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Eric B Taylor
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA, USA; Fraternal Order of Eagles Diabetes Research Center (FOEDRC), University of Iowa, Iowa City, IA, USA; FOEDRC Metabolomics Core Research Facility, University of Iowa, Iowa City, IA, USA; Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA; Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA, USA.
| | - Diana Zepeda-Orozco
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus OH, USA; Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA; Department of Pediatrics, The Ohio State University, Columbus, OH, USA.
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5
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Wang YY, Lin YH, Wu VC, Lin YH, Huang CY, Ku WC, Sun CY. Decreased Klotho Expression Causes Accelerated Decline of Male Fecundity through Oxidative Injury in Murine Testis. Antioxidants (Basel) 2023; 12:1671. [PMID: 37759974 PMCID: PMC10526093 DOI: 10.3390/antiox12091671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/18/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
Oxidative stress is the etiology for 30-80% of male patients affected by infertility, which is a major health problem worldwide. Klotho protein is an aging suppressor that functions as a humoral factor modulating various cellular processes including antioxidation and anti-inflammation, and its dysregulation leads to human pathologies. Male mice lacking Klotho are sterile, and decreased Klotho levels in the serum are observed in men suffering from infertility with lower sperm counts. However, the mechanism by which Klotho maintains healthy male fertility remains unclear. Klotho haplodeficiency (Kl+/-) accelerates fertility reduction by impairing sperm quality and spermatogenesis in Kl+/- mice. Testicular proteomic analysis revealed that loss of Klotho predominantly disturbed oxidation and the glutathione-related pathway. We further focused on the glutathione-S-transferase (GST) family which counteracts oxidative stress in most cell types and closely relates with fertility. Several GST proteins, including GSTP1, GSTO2, and GSTK1, were significantly downregulated, which subsequently resulted in increased levels of the lipid peroxidation product 4-hydroxynonenal and apoptosis in murine testis with low or no expression of Klotho. Taken together, the loss of one Kl allele accelerates male fecundity loss because diminished antioxidant capability induces oxidative injury in mice. This is the first study that highlights a connection between Klotho and GST proteins.
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Affiliation(s)
- Ya-Yun Wang
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan; (Y.-Y.W.); (Y.-H.L.)
| | - Ying-Hung Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan; (Y.-Y.W.); (Y.-H.L.)
| | - Vin-Cent Wu
- Taiwan Consortium for Acute Kidney Injury and Renal Diseases (CAKs), Taipei 100, Taiwan;
- Department of Internal Medicine, National Taiwan University Hospital, Taipei 100, Taiwan
| | - Yu-Hua Lin
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan;
- Division of Urology, Department of Surgery, Cardinal Tien Hospital, New Taipei City 231, Taiwan
| | - Chia-Yen Huang
- Gynecologic Cancer Center, Department of Obstetrics and Gynecology, Cathay General Hospital, Taipei 106, Taiwan;
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan;
| | - Wei-Chi Ku
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan;
| | - Chiao-Yin Sun
- Division of Nephrology, Department of Internal Medicine, Keelung Chang Gung Memorial Hospital, Keelung 204, Taiwan
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
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6
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Huang H, Zhang W, Su J, Zhou B, Han Q. Spermidine Retarded the Senescence of Multipotent Mesenchymal Stromal Cells In Vitro and In Vivo through SIRT3-Mediated Antioxidation. Stem Cells Int 2023; 2023:9672658. [PMID: 37234959 PMCID: PMC10208764 DOI: 10.1155/2023/9672658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 04/18/2023] [Accepted: 04/29/2023] [Indexed: 05/28/2023] Open
Abstract
Multipotent mesenchymal stromal cells (MSCs) expand in vitro and undergo replicative senescence, thereby restricting their clinical utilization. Thus, an effective strategy is required to impede MSC senescence. Since spermidine (SPD) supplementation can prolong the lifespan of yeast by inhibiting oxidative stress, spermidine is a potential option for delaying MSC senescence. In this study, to test our hypothesis, we first isolated primary human umbilical cord mesenchymal stem cells (hUCMSCs). Subsequently, the appropriate SPD dose was administered during continuous cell cultivation. Next, we evaluated the antisenescence effects by SA-β-gal staining, Ki67 expression, reactive oxygen species (ROS) levels, adipogenic or osteogenic ability, senescence-associated markers, and DNA damage markers. The results revealed that early SPD intervention significantly delays the replicative senescence of hUCMSCs and constrains premature H2O2-induced senescence. Additionally, by silencing SIRT3, the SPD-mediated antisenescence effects disappear, further demonstrating that SIRT3 is necessary for SPD to exert its antisenescence effects on hUCMSCs. Besides, the findings of this study also suggest that SPD in vivo protects MSCs against oxidative stress and delays cell senescence. Thus, MSCs maintain the ability to proliferate and differentiate efficiently in vitro and in vivo, which reflects the potential clinical utilization of MSCs in the future.
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Affiliation(s)
- Hua Huang
- Department of Urology, The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China
- The Center of Reproductive Medicine, The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China
| | - Wen Zhang
- Department of General Medicine, The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China
| | - Junjie Su
- Department of Urology, The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China
| | - Bisheng Zhou
- Department of Urology, The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China
| | - Qingjiang Han
- Department of Urology, The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Luoyang 471003, China
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7
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Rauckhorst AJ, Martinez GV, Andrade GM, Wen H, Kim JY, Simoni A, Mapuskar KA, Rastogi P, Steinbach EJ, McCormick ML, Allen BG, Pabla NS, Jackson AR, Coleman MC, Spitz DR, Taylor EB, Zepeda-Orozco D. Tubular Mitochondrial Pyruvate Carrier Disruption Elicits Redox Adaptations that Protect from Acute Kidney Injury. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.31.526492. [PMID: 36778297 PMCID: PMC9915694 DOI: 10.1101/2023.01.31.526492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Energy-intensive kidney reabsorption processes essential for normal whole-body function are maintained by tubular epithelial cell metabolism. Tubular metabolism changes markedly following acute kidney injury (AKI), but which changes are adaptive versus maladaptive remain poorly understood. In publicly available data sets, we noticed a consistent downregulation of the mitochondrial pyruvate carrier (MPC) after AKI, which we experimentally confirmed. To test the functional consequences of MPC downregulation, we generated novel tubular epithelial cell-specific Mpc1 knockout (MPC TubKO) mice. 13C-glucose tracing, steady-state metabolomic profiling, and enzymatic activity assays revealed that MPC TubKO coordinately increased activities of the pentose phosphate pathway and the glutathione and thioredoxin oxidant defense systems. Following rhabdomyolysis-induced AKI, MPC TubKO decreased markers of kidney injury and oxidative damage and strikingly increased survival. Our findings suggest that decreased mitochondrial pyruvate uptake is a central adaptive response following AKI and raise the possibility of therapeutically modulating the MPC to attenuate AKI severity.
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Affiliation(s)
- Adam J. Rauckhorst
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA, USA
- Fraternal Order of Eagles Diabetes Research Center (FOEDRC), University of Iowa, Iowa City, IA, USA
- FOEDRC Metabolomics Core Research Facility, University of Iowa, Iowa City, IA, USA
| | - Gabriela Vasquez Martinez
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus OH, USA
| | - Gabriel Mayoral Andrade
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus OH, USA
| | - Hsiang Wen
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA
| | - Ji Young Kim
- Division of Pharmaceutics and Pharmacology, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Aaron Simoni
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus OH, USA
| | - Kranti A. Mapuskar
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Prerna Rastogi
- Department of Pathology, University of Iowa, Iowa City, IA, USA
| | - Emily J Steinbach
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Michael L. McCormick
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Bryan G. Allen
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Navjot S. Pabla
- Division of Pharmaceutics and Pharmacology, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Ashley R. Jackson
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus OH, USA
- Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - Mitchell C. Coleman
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
- Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
| | - Douglas R. Spitz
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Eric B. Taylor
- Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA, USA
- Fraternal Order of Eagles Diabetes Research Center (FOEDRC), University of Iowa, Iowa City, IA, USA
- FOEDRC Metabolomics Core Research Facility, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, IA, USA
| | - Diana Zepeda-Orozco
- Kidney and Urinary Tract Research Center, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus OH, USA
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA
- Department of Pediatrics, The Ohio State University, Columbus, OH, USA
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8
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Fan J, Wang S, Chen K, Sun Z. Aging impairs arterial compliance via Klotho-mediated downregulation of B-cell population and IgG levels. Cell Mol Life Sci 2022; 79:494. [PMID: 36001158 PMCID: PMC10082671 DOI: 10.1007/s00018-022-04512-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 07/31/2022] [Accepted: 08/01/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Aging is associated with compromised immune function and arterial remodeling and stiffness. The purpose of this study is to investigate whether in vivo AAV-based delivery of secreted Klotho (SKL) gene (AAV-SKL) improves aging- and senescence-associated immune dysfunction and arterial stiffness. METHODS AND RESULTS Senescence-accelerated mice prone strain 1 (SAMP1, 10 months) and old mice (20 months) were used. Serum SKL levels, B-cell population and serum IgG levels were markedly decreased in SAMP1 and old mice. Rescue of downregulation of serum SKL levels by in vivo AAV2-based delivery of SKL gene (AAV-SKL) increased B-cell population and serum IgG levels and attenuated arterial stiffness in SAMP1 and old mice. Thus, Klotho deficiency may play a role in senescence- and aging-associated humoral immune dysfunction and arterial stiffness. Vascular infiltration of inflammatory cells and expression of TGFβ1, collagen 1, scleraxis, MMP-2 and MMP-9 were increased while the elastin level was decreased in aortas of SAMP1 and old mice which can be rescued by AAV-SKL. Interestingly, treatment with IgG effectively rescued arterial inflammation and remodeling and attenuated arterial stiffness and hypertension in aging mice. In cultured B-lymphoblast cells, we further showed that SKL regulates B-cell proliferation and maturation partly via the NFkB pathway. CONCLUSION Aging-associated arterial stiffening may be largely attributed to downregulation of B-cell population and serum IgG levels. AAV-SKL attenuates arterial stiffness in aging mice partly via restoring B-cell population and serum IgG levels which attenuates aging-associated vascular inflammation and arterial remodeling.
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Affiliation(s)
- Jun Fan
- Department of Physiology, College of Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Shirley Wang
- Department of Physiology, College of Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
| | - Kai Chen
- Department of Physiology, College of Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK, USA
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, A302 Coleman Building, 956 Court Avenue, Memphis, TN, 38163, USA
| | - Zhongjie Sun
- Department of Physiology, College of Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK, USA.
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, A302 Coleman Building, 956 Court Avenue, Memphis, TN, 38163, USA.
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In Vivo Cardiac-specific Expression of Adenylyl Cyclase 4 Gene Protects against Klotho Deficiency-induced Heart Failure. Transl Res 2022; 244:101-113. [PMID: 35114419 PMCID: PMC9119924 DOI: 10.1016/j.trsl.2022.01.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/10/2022] [Accepted: 01/26/2022] [Indexed: 01/10/2023]
Abstract
Klotho is an aging-suppressor gene. Klotho gene deficiency causes heart failure in Klotho-hypomorphic mutant (KL (-/-)) mice. RNA-seq and western blot analysis showed that adenylyl cyclase type IV (AC4) mRNA and protein expression was largely decreased in cardiomyocytes of KL (-/-) mice. The objective of this study was to investigate whether in vivo cardiac-specific expression of AC4 gene protects against Klotho deficiency-induced heart failure. Interestingly, in vivo AAV-based cardiac-specific AC4 gene expression increased left ventricular fractional shortening, ejection fraction, stroke volume, and left ventricular end-diastolic volume in KL (-/-) mice, suggesting that cardiac-specific AC4 gene expression improves Klotho deficiency-induced heart dysfunction. Cardiac-specific AC4 gene expression also decreased Klotho deficiency-induced cardiac hypertrophy. Cardiac-specific AC4 gene expression alleviated Klotho deficiency-induced cardiac fibrosis and calcification. Furthermore, cardiac-specific AC4 gene expression attenuated mitochondrial dysfunction, superoxide accumulation and cardiomyocyte apoptotic cell death. Thus, downregulation of AC4 may contribute to Klotho deficiency-induced heart failure. Mechanistically, AAV2/9-αMHC-AC4 increased cardiomyocytic cAMP levels and thus regulated the PKA-PLN-SERCA2 signal pathway, which is critical in modulating calcium flux and mitochondrial function. In conclusion, cardiac-specific AC4 gene expression protects against Klotho deficiency-induced heart failure through increasing cardiomyocytic cAMP levels, which alleviates cAMP-dependent mitochondrial dysfunction, superoxide accumulation and apoptotic cell death. AC4 regulates superoxide levels via the cAMP-PKA pathway. AC4 could be a potential therapeutic target for heart failure associated with Klotho deficiency. Heart failure is the major cause of mortality in patients with chronic kidney disease (CKD). A decrease in Klotho levels is linked to CKD.
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Han X, Sun Z. Adult Mouse Kidney Stem Cells Orchestrate the De Novo Assembly of a Nephron via Sirt2-Modulated Canonical Wnt/β-Catenin Signaling. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104034. [PMID: 35315252 PMCID: PMC9130916 DOI: 10.1002/advs.202104034] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 02/24/2022] [Indexed: 06/14/2023]
Abstract
Generation of kidney organoids using autologous kidney stem cells represents an attractive strategy for treating and potentially replacing the failing kidneys. However, whether adult mammalian kidney stem cells have regenerative capacity remains unknown. Here, previously unidentified adult kidney Sca1+ Oct4+ stem/progenitor cells are isolated. Interestingly, culturing these cells leads to generation of kidney-like structures. First, the assembly of self-organizing 3D kidney-like structures is observed. These kidney organoids contain podocytes, proximal tubules, and endothelial cells that form networks of capillary loop-like structures. Second, the differentiation of kidney stem cells into functionally mature tubules and self-organizing kidney-shaped structures in monolayer culture that selectively endocytoses dextran, is shown. Finally, the de novo generation of an entire self-organizing nephron from monolayer cultures is observed. Mechanistically, it is demonstrated that Sirt2-mediated canonical Wnt/β-catenin signaling is critical for the development of kidney organoids. Thus, the first evidence is provided that the adult mouse kidney stem cells are capable of de novo generating kidney organoids.
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Affiliation(s)
- Xiaobin Han
- Department of PhysiologyUniversity of Tennessee Health Science CenterMemphisTN38163USA
| | - Zhongjie Sun
- Department of PhysiologyUniversity of Tennessee Health Science CenterMemphisTN38163USA
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11
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Zhu Y, Prata LGL, Gerdes EOW, Netto JME, Pirtskhalava T, Giorgadze N, Tripathi U, Inman CL, Johnson KO, Xue A, Palmer AK, Chen T, Schaefer K, Justice JN, Nambiar AM, Musi N, Kritchevsky SB, Chen J, Khosla S, Jurk D, Schafer MJ, Tchkonia T, Kirkland JL. Orally-active, clinically-translatable senolytics restore α-Klotho in mice and humans. EBioMedicine 2022; 77:103912. [PMID: 35292270 PMCID: PMC9034457 DOI: 10.1016/j.ebiom.2022.103912] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 02/16/2022] [Accepted: 02/17/2022] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND α-Klotho is a geroprotective protein that can attenuate or alleviate deleterious changes with ageing and disease. Declines in α-Klotho play a role in the pathophysiology of multiple diseases and age-related phenotypes. Pre-clinical evidence suggests that boosting α-Klotho holds therapeutic potential. However, readily clinically-translatable, practical strategies for increasing α-Klotho are not at hand. Here, we report that orally-active, clinically-translatable senolytics can increase α-Klotho in mice and humans. METHODS We examined α-Klotho expression in three different human primary cell types co-cultured with conditioned medium (CM) from senescent or non-senescent cells with or without neutralizing antibodies. We assessed α-Klotho expression in aged, obese, and senescent cell-transplanted mice treated with vehicle or senolytics. We assayed urinary α-Klotho in patients with idiopathic pulmonary fibrosis (IPF) who were treated with the senolytic drug combination, Dasatinib plus Quercetin (D+Q). FINDINGS We found exposure to the senescent cell secretome reduces α-Klotho in multiple nonsenescent human cell types. This was partially prevented by neutralizing antibodies against the senescence-associated secretory phenotype (SASP) factors, activin A and Interleukin 1α (IL-1α). Consistent with senescent cells' being a cause of decreased α-Klotho, transplanting senescent cells into younger mice reduced brain and urine α-Klotho. Selectively removing senescent cells genetically or pharmacologically increased α-Klotho in urine, kidney, and brain of mice with increased senescent cell burden, including naturally-aged, diet-induced obese (DIO), or senescent cell-transplanted mice. D+Q increased α-Klotho in urine of patients with IPF, a disease linked to cellular senescence. INTERPRETATION Senescent cells cause reduced α-Klotho, partially due to their production of activin A and IL-1α. Targeting senescent cells boosts α-Klotho in mice and humans. Thus, clearing senescent cells restores α-Klotho, potentially opening a novel, translationally-feasible avenue for developing orally-active small molecule, α-Klotho-enhancing clinical interventions. Furthermore, urinary α-Klotho may prove to be a useful test for following treatments in senolytic clinical trials. FUNDING This work was supported by National Institute of Health grants AG013925 (J.L.K.), AG062413 (J.L.K., S.K.), AG044271 (N.M.), AG013319 (N.M.), and the Translational Geroscience Network (AG061456: J.L.K., T.T., N.M., S.B.K., S.K.), Robert and Arlene Kogod (J.L.K.), the Connor Group (J.L.K.), Robert J. and Theresa W. Ryan (J.L.K.), and the Noaber Foundation (J.L.K.). The previous IPF clinical trial was supported by the Claude D. Pepper Older Americans Independence Centers at WFSM (AG021332: J.N.J., S.B.K.), UTHSCA (AG044271: A.M.N.), and the Translational Geroscience Network.
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Affiliation(s)
- Yi Zhu
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Corresponding authors at: Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA.
| | | | - Erin O. Wissler Gerdes
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | | | - Tamar Pirtskhalava
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Nino Giorgadze
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Utkarsh Tripathi
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Christina L. Inman
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Kurt O. Johnson
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Ailing Xue
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Allyson K. Palmer
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Tingjun Chen
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
| | - Kalli Schaefer
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA
| | - Jamie N. Justice
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Anoop M. Nambiar
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Internal Medicine, University of Texas Health Sciences Center at San Antonio and South Texas Veterans Health Care System, San Antonio, TX 78229, USA
| | - Nicolas Musi
- Barshop Institute for Longevity and Aging Studies, Center for Healthy Aging, University of Texas Health Sciences Center at San Antonio and Geriatric Research, Education, and Clinical Center, South Texas Veterans Health Care System, San Antonio, TX 78229, USA
| | - Stephen B. Kritchevsky
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Jun Chen
- Division of Computational Biology, Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN 55905, USA
| | - Sundeep Khosla
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA,Division of Endocrinology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Diana Jurk
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
| | - Marissa J. Schafer
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
| | - Tamar Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
| | - James L. Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Division of General Internal Medicine, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA,Corresponding authors at: Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First St., S.W., Rochester, MN 55905, USA.
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12
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Sun QW, Sun Z. Stem Cell Therapy for Pulmonary Arterial Hypertension: An Update. J Heart Lung Transplant 2022; 41:692-703. [DOI: 10.1016/j.healun.2022.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/04/2022] [Accepted: 02/27/2022] [Indexed: 10/18/2022] Open
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Zhao M, Murakami S, Matsumaru D, Kawauchi T, Nabeshima YI, Motohashi H. NRF2 Pathway Activation Attenuates Aging-Related Renal Phenotypes due to α-Klotho Deficiency. J Biochem 2022; 171:579-589. [DOI: 10.1093/jb/mvac014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 02/03/2022] [Indexed: 11/13/2022] Open
Abstract
Summary
Oxidative stress is one of the major causes of the age-related functional decline in cells and tissues. The KEAP1-NRF2 system plays a central role in the regulation of redox balance, and NRF2 activation exerts antiaging effects by controlling oxidative stress in aged tissues. α-Klotho was identified as an aging suppressor protein based on the premature aging phenotypes of its mutant mice, and its expression is known to gradually decrease during aging. Because α-Klotho has been shown to possess antioxidant function, aging-related phenotypes of α-Klotho mutant mice seem to be attributable to increased oxidative stress at least in part. To examine whether NRF2 activation antagonizes aging-related phenotypes caused by α-Klotho deficiency, we crossed α-Klotho-deficient (Kl–/–) mice with a Keap1-knockdown background, in which the NRF2 pathway is constitutively activated in the whole body. NRF2 pathway activation in Kl–/– mice extended the lifespan and dramatically improved aging-related renal phenotypes. With elevated expression of antioxidant genes accompanied by an oxidative stress decrease, the antioxidant effects of NRF2 seem to make a major contribution to the attenuation of aging-related renal phenotypes of Kl–/– mice. Thus, NRF2 is expected to exert an antiaging function by partly compensating for the functional decline of α-Klotho during physiological aging.
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Affiliation(s)
- Mingyue Zhao
- Department of Gene Expression Regulation, Institute of Development, Aging and Cancer, Tohoku University, Sendai, 980-8575, Japan
| | - Shohei Murakami
- Department of Gene Expression Regulation, Institute of Development, Aging and Cancer, Tohoku University, Sendai, 980-8575, Japan
| | - Daisuke Matsumaru
- Department of Gene Expression Regulation, Institute of Development, Aging and Cancer, Tohoku University, Sendai, 980-8575, Japan
| | - Takeshi Kawauchi
- Laboratory of Molecular Life Science, Institute of Biomedical Research and Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe 650-0047, Japan
| | - Yo-ichi Nabeshima
- Laboratory of Molecular Life Science, Institute of Biomedical Research and Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe 650-0047, Japan
| | - Hozumi Motohashi
- Department of Gene Expression Regulation, Institute of Development, Aging and Cancer, Tohoku University, Sendai, 980-8575, Japan
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Chen K, Sun Z. Estrogen inhibits renal Na-Pi Co-transporters and improves klotho deficiency-induced acute heart failure. Redox Biol 2021; 47:102173. [PMID: 34678656 PMCID: PMC8577443 DOI: 10.1016/j.redox.2021.102173] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/17/2021] [Accepted: 10/17/2021] [Indexed: 01/06/2023] Open
Abstract
Objective and hypothesis Klotho is an aging-suppressor gene. Mutation of Klotho gene causes hyperphosphatemia and acute heart failure. However, the relationship of hyperphosphatemia and acute heart failure is unclear. We hypothesize that hyperphosphatemia mediates Klotho deficiency-induced acute heart failure and further that therapeutic reduction of hyperphosphatemia prevents acute heart failure in Klotho mutant (KL(−/−)) mice. Methods and results A significant elevation of serum phosphorus levels and a large reduction of heart function were found in KL(−/−) mice by six weeks of age. Normalization of serum phosphorus levels by low phosphate diet (LPD) rescued Klotho deficiency-induced heart failure and extended lifespan in male mice. Klotho deficiency impaired cardiac mitochondrial respiratory enzyme function and increased superoxide production, oxidative stress, and cardiac cell apoptosis in male KL(−/−) mice which can be eliminated by LPD. LPD, however, did not rescue hyperphosphatemia or heart failure in female KL(−/−) mice. LPD did not affect estrogen depletion in female KL(−/−) mice. Normalization of serum estrogen levels by treatment with 17β-estradiol prevented hyperphosphatemia and heart failure in female KL(−/−) mice. Mechanistically, treatment with 17β-estradiol rescued hyperphosphatemia via inhibiting renal Na-Pi co-transporter expression. Normalization of serum phosphorus levels by treatment with 17β-estradiol also abolished cardiac mitochondrial respiratory enzyme dysfunction, ROS overproduction, oxidative stress and cardiac cell apoptosis in female KL(−/−) mice. Conclusion Klotho deficiency causes acute heart failure via hyperphosphatemia in male mice which can be prevented by LPD. 17β-estradiol prevents Klotho deficiency-induced hyperphosphatemia and heart failure by eliminating upregulation of renal Na-Pi co-transporter expression in female mice.
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Affiliation(s)
- Kai Chen
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Zhongjie Sun
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA.
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Zheng Q, Li P, Zhou X, Qiang Y, Fan J, Lin Y, Chen Y, Guo J, Wang F, Xue H, Xiong J, Li F. Deficiency of the X-inactivation escaping gene KDM5C in clear cell renal cell carcinoma promotes tumorigenicity by reprogramming glycogen metabolism and inhibiting ferroptosis. Theranostics 2021; 11:8674-8691. [PMID: 34522206 PMCID: PMC8419058 DOI: 10.7150/thno.60233] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 07/25/2021] [Indexed: 12/17/2022] Open
Abstract
Background: Clear cell renal cell carcinoma (ccRCC) is characterized by glycogen-laden, unexplained male predominance, and frequent mutations in the Von Hippel-Lindau (VHL) gene and histone modifier genes. Besides, poor survival rates of ccRCC patients seem to be associated with up-regulation of the pentose phosphate pathway (PPP). However, the mechanism underlying these features remains unclear. Methods: Whole exome sequencing was used to identify the gene mutation that implicated in the rewired glucose metabolism. RNA-seq analyses were performed to evaluate the function of KDM5C in ccRCC. Furthermore, heavy isotope tracer analysis and metabolites quantification assays were used to study how KDM5C affects intracellular metabolic flux. To provide more in vivo evidence, we generated the Kdm5c-/- mice by CRISPR-Cas9 mediated gene knockout and performed the xenografts with KDM5C overexpressing or depleted cell lines. Results: A histone demethylase gene KDM5C, which can escape from X-inactivation and is predominantly mutated in male ccRCC patients, was identified to harbor the frameshift mutation in the ccRCC cell line with the highest glycogen level, while the restoration of KDM5C significantly reduced the glycogen level. Transcriptome and metabolomic analysis linked KDM5C to metabolism-related biological processes. KDM5C specifically regulated the expression of several hypoxia-inducible factor (HIF)-related genes and Glucose-6-phosphate dehydrogenase (G6PD) that were involved in glycogenesis/glycogenolysis and PPP, respectively, mainly through the histone demethylase activity of KDM5C. Depletion of KDM5C increased the production of glycogen, which was then directed to glycogenolysis to generate glucose-6-phosphate (G6P) and subsequently PPP to produce nicotinamide adenine dinucleotide phosphate hydride (NADPH) and glutathione (GSH), thus conferring cells resistance to reactive oxygen species (ROS) and ferroptosis. KDM5C re-expression suppressed the glucose flux through PPP and re-sensitized cancer cells to ferroptosis. Notably, Kdm5c-knockout mice kidney tissues exhibited elevated glycogen level, reduced lipid peroxidation and displayed a transformation of renal cysts into hyperplastic lesions, implying a cancer-protective benefit of ferroptosis. Furthermore, KDM5C deficiency predicted the poor prognosis, and clinically relevant KDM5C mutants failed to suppress glycogen accumulation and promoted ferroptosis as wild type. Conclusion: This work revealed that a histone modifier gene inactive mutation reprogramed glycogen metabolism and helped to explain the long-standing puzzle of male predominance in human cancer. In addition, our findings may suggest the therapeutic value of targeting glycogen metabolism in ccRCC.
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16
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Lian WS, Wu RW, Chen YS, Ko JY, Wang SY, Jahr H, Wang FS. MicroRNA-29a Mitigates Osteoblast Senescence and Counteracts Bone Loss through Oxidation Resistance-1 Control of FoxO3 Methylation. Antioxidants (Basel) 2021; 10:antiox10081248. [PMID: 34439496 PMCID: PMC8389244 DOI: 10.3390/antiox10081248] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/01/2021] [Accepted: 08/01/2021] [Indexed: 12/20/2022] Open
Abstract
Senescent osteoblast overburden accelerates bone mass loss. Little is understood about microRNA control of oxidative stress and osteoblast senescence in osteoporosis. We revealed an association between microRNA-29a (miR-29a) loss, oxidative stress marker 8-hydroxydeoxyguanosine (8-OHdG), DNA hypermethylation marker 5-methylcystosine (5mC), and osteoblast senescence in human osteoporosis. miR-29a knockout mice showed low bone mass, sparse trabecular microstructure, and osteoblast senescence. miR-29a deletion exacerbated bone loss in old mice. Old miR-29a transgenic mice showed fewer osteoporosis signs, less 5mC, and less 8-OHdG formation than age-matched wild-type mice. miR-29a overexpression reversed age-induced senescence and osteogenesis loss in bone-marrow stromal cells. miR-29a promoted transcriptomic landscapes of redox reaction and forkhead box O (FoxO) pathways, preserving oxidation resistance protein-1 (Oxr1) and FoxO3 in old mice. In vitro, miR-29a interrupted DNA methyltransferase 3b (Dnmt3b)-mediated FoxO3 promoter methylation and senescence-associated β-galactosidase activity in aged osteoblasts. Dnmt3b inhibitor 5'-azacytosine, antioxidant N-acetylcysteine, or Oxr1 recombinant protein attenuated loss in miR-29a and FoxO3 to mitigate oxidative stress, senescence, and mineralization matrix underproduction. Taken together, miR-29a promotes Oxr1, compromising oxidative stress and FoxO3 loss to delay osteoblast aging and bone loss. This study sheds light on a new antioxidation mechanism by which miR-29a protects against osteoblast aging and highlights the remedial effects of miR-29a on osteoporosis.
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Affiliation(s)
- Wei-Shiung Lian
- Core Laboratory for Phenomics and Diagnostic, Department of Medical Research, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (W.-S.L.); (Y.-S.C.); (S.-Y.W.)
- Center for Mitochondrial Research and Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Re-Wen Wu
- Department of Orthopedic Surgery, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (R.-W.W.); (J.-Y.K.)
| | - Yu-Shan Chen
- Core Laboratory for Phenomics and Diagnostic, Department of Medical Research, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (W.-S.L.); (Y.-S.C.); (S.-Y.W.)
| | - Jih-Yang Ko
- Department of Orthopedic Surgery, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (R.-W.W.); (J.-Y.K.)
| | - Shao-Yu Wang
- Core Laboratory for Phenomics and Diagnostic, Department of Medical Research, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (W.-S.L.); (Y.-S.C.); (S.-Y.W.)
| | - Holger Jahr
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen, 52074 Aachen, Germany;
- Department of Orthopedic Surgery, Maastricht University Medical Center, 6229 ER Maastricht, The Netherlands
| | - Feng-Sheng Wang
- Core Laboratory for Phenomics and Diagnostic, Department of Medical Research, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (W.-S.L.); (Y.-S.C.); (S.-Y.W.)
- Center for Mitochondrial Research and Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Correspondence: ; Tel.: +886-7-731-7123
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17
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Exercise-Linked Irisin Prevents Mortality and Enhances Cognition in a Mice Model of Cerebral Ischemia by Regulating Klotho Expression. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:1697070. [PMID: 34306305 PMCID: PMC8282383 DOI: 10.1155/2021/1697070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/13/2021] [Accepted: 06/13/2021] [Indexed: 01/04/2023]
Abstract
Irisin, which can be released in the hippocampus after physical exercise, is demonstrated to have beneficial effects on neurovascular diseases. This study investigated the impact of exercise linked-irisin on mortality and cognition in a mice model of cerebral ischemia and further explored its underlying mechanism. The cerebrospinal concentrations of irisin and klotho from ischemic stroke patients were measured with an enzyme-linked immunosorbent assay (ELISA). The cognitive function of mice was evaluated by a series of behavioural experiments. The expressions of klotho, MnSOD, and FOXO3a in the hippocampus of mice were detected by Western blot. Superoxide production in the brain tissue of mice was evaluated with the dihydroethidium (DHE) dying. The results demonstrated that stroke patients showed a positive correlation between their CSF irisin concentration and klotho concentration. In addition, when mice subjected to cerebral ischemia, their cognitive function was impaired, the protein expressions of klotho, MnSOD, and FOXO3a downregulated, and the production of reactive oxygen species (ROS) increased compared with the sham group. After pretreatment with exogenous irisin, improved cognitive impairment, upregulated protein expressions of klotho, MnSOD, and FOXO3a, and reduced ROS generation were observed in mice with MCAO. However, the neuroprotective effects of irisin compromised with the evidence of severe cognitive impairment, decreased protein expressions of MnSOD and FOXO3a, and increased ROS production in klotho knockout mice. Thus, our results indicated that exercise-linked irisin could prevent mortality and improve cognitive impairment after cerebral ischemia by regulating klotho expression.
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Wang Q, Wang S, Sun Z. Kidney-Specific Klotho Gene Deletion Causes Aortic Aneurysm via Hyperphosphatemia. Hypertension 2021; 78:308-319. [PMID: 34176284 DOI: 10.1161/hypertensionaha.121.17299] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
[Figure: see text].
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Affiliation(s)
- Qiongxin Wang
- Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center (Q.W., S.W., Z.S.)
| | - Shirley Wang
- Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center (Q.W., S.W., Z.S.).,Department of Physiology, College of Medicine, The University of Tennessee Health Science Center, Memphis (S.W., Z.S.)
| | - Zhongjie Sun
- Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center (Q.W., S.W., Z.S.).,Department of Physiology, College of Medicine, The University of Tennessee Health Science Center, Memphis (S.W., Z.S.)
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Chen K, Zhang B, Sun Z. MicroRNA 379 Regulates Klotho Deficiency-Induced Cardiomyocyte Apoptosis Via Repression of Smurf1. Hypertension 2021; 78:342-352. [PMID: 34120450 DOI: 10.1161/hypertensionaha.120.16888] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Kai Chen
- From the Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., B.Z., Z.S.).,Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center (K.C., Z.S.)
| | - Bo Zhang
- From the Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., B.Z., Z.S.)
| | - Zhongjie Sun
- From the Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., B.Z., Z.S.).,Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center (K.C., Z.S.)
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Lai L, Li Y, Liu J, Luo L, Tang J, Xue J, Liu T. Bovine serum albumin aggravates macrophage M1 activation and kidney injury in heterozygous Klotho-deficient mice via the gut microbiota-immune axis. Int J Biol Sci 2021; 17:742-755. [PMID: 33767585 PMCID: PMC7975693 DOI: 10.7150/ijbs.56424] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/18/2021] [Indexed: 12/12/2022] Open
Abstract
Klotho expression abnormalities induces kidney injury and chronic kidney disease, however, the underlying mechanism remains unclear. Here, Klotho+/- mice and wild-type mice were treated with low-dose bovine serum albumin (BSA). Pathological examination demonstrated that the area of glomerular collagen deposition and fibrosis in BSA-Kl-/+ mice was significantly larger than that in BSA-WT mice. The serum levels of superoxide dismutase, malondialdehyde, creatinine, and urea in BSA-Kl-/+ mice were significantly increased. Sequencing of gut microbiota 16S rRNA v3-v4 region indicated that BSA-Kl-/+ mice showed a significantly higher relative abundance of the genera Dubosiella, Akkermansia, Alloprevotella, and Lachnospiraceae and a significantly lower relative abundance of the genera Allobaculum and Muribaculaceae than BSA-WT mice. KEGG analysis revealed that the metabolic pathways of signal transduction, xenobiotic biodegradation and metabolism, and lipid metabolism increased significantly in BSA-Kl-/+ mice. Flow cytometry showed that the proportion of CD68+/CD11b+ cells in the peripheral blood was significantly higher in BSA-KL-/+ mice than that in BSA-WT mice. qPCR and western blot suggested that Klotho and Nrf2 expression in MΦ1 cells of BSA-KL-/+ mice was significantly decreased. Thus, the findings suggest during the immune activation and chronic inflammation induced by the gut microbiota imbalance in Klotho-deficient mice treated to BSA, disrupted expression of proteins in the Nrf2/NF-κB signaling pathway in monocyte-derived macrophage M1 cells leads to the aggravation of inflammation and kidney injury.
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Affiliation(s)
- Lingyun Lai
- Division of Nephrology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yi Li
- Division of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Jianjun Liu
- Trauma-Emergency & Critical Care Medicine Center, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200240, China
| | - Lei Luo
- Division of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Jianguo Tang
- Trauma-Emergency & Critical Care Medicine Center, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200240, China
| | - Jun Xue
- Division of Nephrology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Te Liu
- Shanghai Geriatric Institute of Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200031, China.,Department of Pathology, Yale University School of Medicine, New Haven, Connecticut 06520, USA
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Chen K, Wang S, Sun QW, Zhang B, Ullah M, Sun Z. Klotho Deficiency Causes Heart Aging via Impairing the Nrf2-GR Pathway. Circ Res 2020; 128:492-507. [PMID: 33334122 DOI: 10.1161/circresaha.120.317348] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
RATIONALE Cardiac aging is an important contributing factor for heart failure, which affects a large population but remains poorly understood. OBJECTIVE The purpose of this study is to investigate whether Klotho plays a role in cardiac aging. METHODS AND RESULTS Heart function declined in old mice (24 months), as evidenced by decreases in fractional shortening, ejection fraction, and cardiac output. Heart size and weight, cardiomyocyte size, and cardiac fibrosis were increased in old mice, indicating that aging causes cardiac hypertrophy and remodeling. Circulating Klotho levels were dramatically decreased in old mice, which prompted us to investigate whether the Klotho decline may cause heart aging. We found that Klotho gene mutation (KL-/-) largely decreased serum klotho levels and impaired heart function. Interestingly, supplement of exogenous secreted Klotho prevented heart failure, hypertrophy, and remodeling in both old mice and KL (-/-) mice. Secreted Klotho treatment inhibited excessive cardiac oxidative stress, senescence and apoptosis in old mice and KL (-/-) mice. Serum phosphate levels in KL (-/-) mice were kept in the normal range, suggesting that Klotho deficiency-induced heart aging is independent of phosphate metabolism. Mechanistically, Klotho deficiency suppressed GR (glutathione reductase) expression and activity in the heart via inhibition of transcription factor Nrf2 (nuclear factor-erythroid 2 p45-related factor 2). Furthermore, cardiac-specific overexpression of GR prevented excessive oxidative stress, apoptosis, and heart failure in both old and KL (-/-) mice. CONCLUSIONS Klotho deficiency causes cardiac aging via impairing the Nrf2-GR pathway. Supplement of exogenous secreted Klotho represents a promising therapeutic strategy for aging-associated cardiomyopathy and heart failure.
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Affiliation(s)
- Kai Chen
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., S.W., Q.W.S., B.Z., Z.S.).,Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City (K.C., S.W., M.U., Z.S.)
| | - Shirley Wang
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., S.W., Q.W.S., B.Z., Z.S.).,Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City (K.C., S.W., M.U., Z.S.)
| | - Qiwei Wilton Sun
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., S.W., Q.W.S., B.Z., Z.S.)
| | - Bo Zhang
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., S.W., Q.W.S., B.Z., Z.S.)
| | - Mujib Ullah
- Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City (K.C., S.W., M.U., Z.S.)
| | - Zhongjie Sun
- Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis (K.C., S.W., Q.W.S., B.Z., Z.S.).,Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City (K.C., S.W., M.U., Z.S.)
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