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Soloviev A, Sydorenko V. Oxidative and Nitrous Stress Underlies Vascular Malfunction Induced by Ionizing Radiation and Diabetes. Cardiovasc Toxicol 2024; 24:776-788. [PMID: 38916845 DOI: 10.1007/s12012-024-09878-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 05/30/2024] [Indexed: 06/26/2024]
Abstract
Oxidative stress results from the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in quantities exceeding the potential activity of the body's antioxidant system and is one of the risk factors for the development of vascular dysfunction in diabetes and exposure to ionizing radiation. Being the secondary products of normal aerobic metabolism in living organisms, ROS and RNS act as signaling molecules that play an important role in the regulation of vital organism functions. Meanwhile, in high concentrations, these compounds are toxic and disrupt various metabolic pathways. The various stress factors (hyperglycemia, gamma-irradiation, etc.) trigger free oxygen and nitrogen radicals accumulation in cells that are capable to damage almost all cellular components including ion channels and transporters such as Na+/K+-ATPase, BKCa, and TRP channels. Vascular dysfunctions are governed by interaction of ROS and RNS. For example, the reaction of ROS with NO produces peroxynitrite (ONOO-), which not only oxidizes DNA, cellular proteins, and lipids, but also disrupts important signaling pathways that regulate the cation channel functions in the vascular endothelium. Further increasing in ROS levels and formation of ONOO- leads to reduced NO bioavailability and causes endothelial dysfunction. Thus, imbalance of ROS and RNS and their affect on membrane ion channels plays an important role in the pathogenesis of vascular dysfunction associated with various disorders.
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Affiliation(s)
- Anatoly Soloviev
- Department for Pharmacology of Cellular Signaling Systems and Experimental Therapeutics, Institute of Pharmacology and Toxicology, National Academy of Medical Science, Kyiv, Ukraine.
| | - Vadym Sydorenko
- Department for Pharmacology of Cellular Signaling Systems and Experimental Therapeutics, Institute of Pharmacology and Toxicology, National Academy of Medical Science, Kyiv, Ukraine
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Cai L, Pessoa MT, Gao Y, Strause S, Banerjee M, Tian J, Xie Z, Pierre SV. The Na/K-ATPase α1/Src Signaling Axis Regulates Mitochondrial Metabolic Function and Redox Signaling in Human iPSC-Derived Cardiomyocytes. Biomedicines 2023; 11:3207. [PMID: 38137428 PMCID: PMC10740578 DOI: 10.3390/biomedicines11123207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/15/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Na/K-ATPase (NKA)-mediated regulation of Src kinase, which involves defined amino acid sequences of the NKA α1 polypeptide, has emerged as a novel regulatory mechanism of mitochondrial function in metazoans. Mitochondrial metabolism ensures adequate myocardial performance and adaptation to physiological demand. It is also a critical cellular determinant of cardiac repair and remodeling. To assess the impact of the proposed NKA/Src regulatory axis on cardiac mitochondrial metabolic function, we used a gene targeting approach in human cardiac myocytes. Human induced pluripotent stem cells (hiPSC) expressing an Src-signaling null mutant (A420P) form of the NKA α1 polypeptide were generated using CRISPR/Cas9-mediated genome editing. Total cellular Na/K-ATPase activity remained unchanged in A420P compared to the wild type (WT) hiPSC, but baseline phosphorylation levels of Src and ERK1/2 were drastically reduced. Both WT and A420P mutant hiPSC readily differentiated into cardiac myocytes (iCM), as evidenced by marker gene expression, spontaneous cell contraction, and subcellular striations. Total NKA α1-3 protein expression was comparable in WT and A420P iCM. However, live cell metabolism assessed functionally by Seahorse extracellular flux analysis revealed significant reductions in both basal and maximal rates of mitochondrial respiration, spare respiratory capacity, ATP production, and coupling efficiency. A significant reduction in ROS production was detected by fluorescence imaging in live cells, and confirmed by decreased cellular protein carbonylation levels in A420P iCM. Taken together, these data provide genetic evidence for a role of NKA α1/Src in the tonic stimulation of basal mitochondrial metabolism and ROS production in human cardiac myocytes. This signaling axis in cardiac myocytes may provide a new approach to counteract mitochondrial dysfunction in cardiometabolic diseases.
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Affiliation(s)
- Liquan Cai
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
| | - Marco T. Pessoa
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
| | - Yingnyu Gao
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
| | - Sidney Strause
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
| | - Moumita Banerjee
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
- Department of Surgery, University of Kentucky, Lexington, KY 40536, USA
| | - Jiang Tian
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
- Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Zijian Xie
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
| | - Sandrine V. Pierre
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA; (L.C.); (M.T.P.); (Y.G.); (S.S.); (M.B.); (J.T.); (Z.X.)
- Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
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3
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Rajan PK, Udoh UAS, Nakafuku Y, Pierre SV, Sanabria J. Normalization of the ATP1A1 Signalosome Rescinds Epigenetic Modifications and Induces Cell Autophagy in Hepatocellular Carcinoma. Cells 2023; 12:2367. [PMID: 37830582 PMCID: PMC10572209 DOI: 10.3390/cells12192367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/14/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related death worldwide. In metabolic dysfunction-associated steatohepatitis (MASH)-related HCC, cellular redox imbalance from metabolic disturbances leads to dysregulation of the α1-subunit of the Na/K-ATPase (ATP1A1) signalosome. We have recently reported that the normalization of this pathway exhibited tumor suppressor activity in MASH-HCC. We hypothesized that dysregulated signaling from the ATP1A1, mediated by cellular metabolic stress, promotes aberrant epigenetic modifications including abnormal post-translational histone modifications and dysfunctional autophagic activity, leading to HCC development and progression. Increased H3K9 acetylation (H3K9ac) and H3K9 tri-methylation (H3K9me3) were observed in human HCC cell lines, HCC-xenograft and MASH-HCC mouse models, and epigenetic changes were associated with decreased cell autophagy in HCC cell lines. Inhibition of the pro-autophagic transcription factor FoxO1 was associated with elevated protein carbonylation and decreased levels of reduced glutathione (GSH). In contrast, normalization of the ATP1A1 signaling significantly decreased H3K9ac and H3K9me3, in vitro and in vivo, with concomitant nuclear localization of FoxO1, heightening cell autophagy and cancer-cell apoptotic activities in treated HCC cell lines. Our results showed the critical role of the ATP1A1 signalosome in HCC development and progression through epigenetic modifications and impaired cell autophagy activity, highlighting the importance of the ATP1A1 pathway as a potential therapeutic target for HCC.
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Affiliation(s)
- Pradeep Kumar Rajan
- Department of Surgery, Marshall Institute for Interdisciplinary Research, Marshall University School of Medicine, Huntington, WV 25701, USA; (P.K.R.); (U.-A.S.U.); (Y.N.); (S.V.P.)
| | - Utibe-Abasi S. Udoh
- Department of Surgery, Marshall Institute for Interdisciplinary Research, Marshall University School of Medicine, Huntington, WV 25701, USA; (P.K.R.); (U.-A.S.U.); (Y.N.); (S.V.P.)
| | - Yuto Nakafuku
- Department of Surgery, Marshall Institute for Interdisciplinary Research, Marshall University School of Medicine, Huntington, WV 25701, USA; (P.K.R.); (U.-A.S.U.); (Y.N.); (S.V.P.)
| | - Sandrine V. Pierre
- Department of Surgery, Marshall Institute for Interdisciplinary Research, Marshall University School of Medicine, Huntington, WV 25701, USA; (P.K.R.); (U.-A.S.U.); (Y.N.); (S.V.P.)
| | - Juan Sanabria
- Department of Surgery, Marshall Institute for Interdisciplinary Research, Marshall University School of Medicine, Huntington, WV 25701, USA; (P.K.R.); (U.-A.S.U.); (Y.N.); (S.V.P.)
- Department of Nutrition and Metabolomic Core Facility, Case Western Reserve University School of Medicine, Cleveland, OH 44100, USA
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Zhang H, Lai F, Cheng X, Wang Y. Involvement of NADPH oxidases in the Na/K‑ATPase/Src/ROS oxidant amplification loop in renal fibrosis. Mol Med Rep 2023; 28:161. [PMID: 37417374 PMCID: PMC10407618 DOI: 10.3892/mmr.2023.13048] [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: 03/23/2023] [Accepted: 06/15/2023] [Indexed: 07/08/2023] Open
Abstract
The Na/K‑ATPase/Src complex is reportedly able to affect reactive oxygen species (ROS) amplification. However, it has remained elusive whether NADPH oxidases (NOXs) are involved in this oxidant amplification loop in renal fibrosis. To test this hypothesis, interactions between oxidative features and Na/K‑ATPase/Src activation were examined in a mouse model of unilateral urethral obstruction (UUO)‑induced experimental renal fibrosis. Both 1‑tert‑butyl‑3‑(4‑chlorophenyl)‑1H‑pyrazolo[3,4‑d]pyrimidin‑4‑amine (PP2) and apocynin significantly attenuated the development of UUO‑induced renal fibrosis. Apocynin administration attenuated the expression of NOXs and oxidative markers (e.g., nuclear factor erythroid 2‑related factor 2, heme oxygenase‑1,4‑hydroxynonenal and 3‑nitrotyrosine); it also partially restored Na/K‑ATPase expression and inhibited the activation of the Src/ERK cascade. Furthermore, administration of PP2 after UUO induction partially reversed the upregulation of NOX2, NOX4 and oxidative markers, while inhibiting the activation of the Src/ERK cascade. Complementary experiments in LLC‑PK1 cells corroborated the in vivo observations. Inhibition of NOX2 by RNA interference attenuated ouabain‑induced oxidative stress, ERK activation and E‑cadherin downregulation. Thus, it is indicated that NOXs are major contributors to ROS production in the Na/K‑ATPase/Src/ROS oxidative amplification loop, which is involved in renal fibrosis. The disruption of this vicious feed‑forward loop between NOXs/ROS and redox‑regulated Na/K‑ATPase/Src may have therapeutic applicability for renal fibrosis disorders.
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Affiliation(s)
- Huimin Zhang
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing 100034, P.R. China
- Institute of Nephrology, Peking University, Beijing 100034, P.R. China
- Key Laboratory of Renal Disease, National Health and Family Planning Commission of The P.R. China, Beijing 100034, P.R. China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing 100034, P.R. China
- Research Units of Diagnosis and Treatment of Immune-Mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing 100034, P.R. China
| | - Fangfang Lai
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, P.R. China
| | - Xi Cheng
- Institute of Nephrology, Peking University, Beijing 100034, P.R. China
- Key Laboratory of Renal Disease, National Health and Family Planning Commission of The P.R. China, Beijing 100034, P.R. China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing 100034, P.R. China
- Research Units of Diagnosis and Treatment of Immune-Mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing 100034, P.R. China
- Department of Nephrology, Tianjin Medical University General Hospital, Tianjin 300070, P.R. China
| | - Yu Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing 100034, P.R. China
- Institute of Nephrology, Peking University, Beijing 100034, P.R. China
- Key Laboratory of Renal Disease, National Health and Family Planning Commission of The P.R. China, Beijing 100034, P.R. China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing 100034, P.R. China
- Research Units of Diagnosis and Treatment of Immune-Mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing 100034, P.R. China
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Sodhi K, Maxwell K, Yan Y, Liu J, Chaudhry MA, Xie Z, Shapiro JI. pNaKtide Inhibits Na/K-ATPase Signaling and Attenuates Obesity. JOURNAL OF CLINICAL AND MEDICAL SCIENCES 2023; 7:1000238. [PMID: 38283397 PMCID: PMC10812088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Obesity is a growing public health crisis across the world and has been recognized as an underlying risk factor for metabolic syndrome. Growing evidence demonstrates the critical role of oxidative stress in the pathophysiological mechanisms of obesity and related metabolic dysfunction. As we have established previously that Na/K-ATPase can amplify oxidative stress signaling, we aimed to explore the effect of inhibition of this pathway on obesity phenotype using the peptide antagonist, pNaKtide. The experiments performed in murine preadipocytes showed the dose-dependent effect of pNaKtide in attenuating oxidant stress and lipid accumulation. Furthermore, these in vitro findings were confirmed in C57Bl6 mice fed a high-fat diet. Interestingly, pNaKtide could significantly reduce body weight, ameliorate systemic oxidative and inflammatory milieu and improve insulin sensitivity in obese mice. Hence the study demonstrates the therapeutic utility of pNaKtide as an inhibitor of Na/K-ATPase oxidant amplification signaling to alleviate obesity and associated comorbidities.
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Affiliation(s)
- Komal Sodhi
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
| | - Kyle Maxwell
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
| | - Yanling Yan
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
| | - Jiang Liu
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
| | - Muhammad A Chaudhry
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
| | - Zijian Xie
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
| | - Joseph I Shapiro
- Department of Medicine, Biomedical Science, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, United States of America
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6
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Li Y, Lu X, Yu Z, Wang H, Gao B. Meta-data analysis of kidney stone disease highlights ATP1A1 involvement in renal crystal formation. Redox Biol 2023; 61:102648. [PMID: 36871182 PMCID: PMC10009205 DOI: 10.1016/j.redox.2023.102648] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 02/11/2023] [Accepted: 02/25/2023] [Indexed: 03/02/2023] Open
Abstract
Nephrolithiasis is a complicated disease affected by various environmental and genetic factors. Crystal-cell adhesion is a critical initiation process during kidney stone formation. However, genes regulated by environmental and genetic factors in this process remain unclear. In the present study, we integrated the gene expression profile data and the whole-exome sequencing data of patients with calcium stones, and found that ATP1A1 might be a key susceptibility gene involved in calcium stone formation. The study showed that the T-allele of rs11540947 in the 5'-untranslated region of ATP1A1 was associated with a higher risk of nephrolithiasis and lower activity of a promoter of ATP1A1. Calcium oxalate crystal deposition decreased ATP1A1 expression in vitro and in vivo and was accompanied by the activation of the ATP1A1/Src/ROS/p38/JNK/NF-κB signaling pathway. However, the overexpression of ATP1A1 or treatment with pNaKtide, a specific inhibitor of the ATP1A1/Src complex, inhibited the ATP1A1/Src signal system and alleviated oxidative stress, inflammatory responses, apoptosis, crystal-cell adhesion, and stone formation. Moreover, the DNA methyltransferase inhibitor 5-aza-2'-deoxycytidine reversed ATP1A1 down-regulation induced by crystal deposition. In conclusion, this is the first study to show that ATP1A1, a gene modulated by environmental factors and genetic variations, plays an important role in renal crystal formation, suggesting that ATP1A1 may be a potential therapeutic target for treating calcium stones.
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Affiliation(s)
- Yang Li
- Department of Biochemistry and Molecular Biology, Life Science School, Liaoning University, Shenyang, 110036, China; Department of Cell biology and Genetics, Shenyang Medical College, Shenyang 110034, China
| | - Xiuli Lu
- Department of Biochemistry and Molecular Biology, Life Science School, Liaoning University, Shenyang, 110036, China
| | - Zhihao Yu
- Department of Cell biology and Genetics, Shenyang Medical College, Shenyang 110034, China
| | - Haozhen Wang
- Department of Biochemistry and Molecular Biology, Life Science School, Liaoning University, Shenyang, 110036, China
| | - Bing Gao
- Department of Cell biology and Genetics, Shenyang Medical College, Shenyang 110034, China.
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Lopatina EV, Gavrichenko AV, Pasatetskaya NA. Involvement of Acetylcholine and Na+,K+-ATPase in the Regulation of Skeletal Muscle Growth in a Chicken Embryo. J EVOL BIOCHEM PHYS+ 2023. [DOI: 10.1134/s0022093023010234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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8
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Huang M, Wang X, Banerjee M, Mukherji ST, Kutz LC, Zhao A, Sepanski M, Fan CM, Zhu GZ, Tian J, Wang DZ, Zhu H, Xie ZJ, Pierre SV, Cai L. Regulation of Myogenesis by a Na/K-ATPase α1 Caveolin-Binding Motif. Stem Cells 2022; 40:133-148. [PMID: 35257186 PMCID: PMC8943859 DOI: 10.1093/stmcls/sxab012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/25/2021] [Indexed: 01/12/2024]
Abstract
The N-terminal caveolin-binding motif (CBM) in Na/K-ATPase (NKA) α1 subunit is essential for cell signaling and somitogenesis in animals. To further investigate the molecular mechanism, we have generated CBM mutant human-induced pluripotent stem cells (iPSCs) through CRISPR/Cas9 genome editing and examined their ability to differentiate into skeletal muscle (Skm) cells. Compared with the parental wild-type human iPSCs, the CBM mutant cells lost their ability of Skm differentiation, which was evidenced by the absence of spontaneous cell contraction, marker gene expression, and subcellular myofiber banding structures in the final differentiated induced Skm cells. Another NKA functional mutant, A420P, which lacks NKA/Src signaling function, did not produce a similar defect. Indeed, A420P mutant iPSCs retained intact pluripotency and ability of Skm differentiation. Mechanistically, the myogenic transcription factor MYOD was greatly suppressed by the CBM mutation. Overexpression of a mouse Myod cDNA through lentiviral delivery restored the CBM mutant cells' ability to differentiate into Skm. Upstream of MYOD, Wnt signaling was demonstrated from the TOPFlash assay to have a similar inhibition. This effect on Wnt activity was further confirmed functionally by defective induction of the presomitic mesoderm marker genes BRACHYURY (T) and MESOGENIN1 (MSGN1) by Wnt3a ligand or the GSK3 inhibitor/Wnt pathway activator CHIR. Further investigation through immunofluorescence imaging and cell fractionation revealed a shifted membrane localization of β-catenin in CBM mutant iPSCs, revealing a novel molecular component of NKA-Wnt regulation. This study sheds light on a genetic regulation of myogenesis through the CBM of NKA and control of Wnt/β-catenin signaling.
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Affiliation(s)
- Minqi Huang
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Xiaoliang Wang
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
- Joan C. Edwards School of Medicine at Marshall University, Huntington, WV 25703, USA
| | - Moumita Banerjee
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Shreya T Mukherji
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Laura C Kutz
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Aijie Zhao
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Michael Sepanski
- Department of Embryology, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA
| | - Chen-Ming Fan
- Department of Embryology, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA
| | - Guo-Zhang Zhu
- Department of Biological Sciences, Marshall University, Huntington, WV 25703, USA
| | - Jiang Tian
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
- Joan C. Edwards School of Medicine at Marshall University, Huntington, WV 25703, USA
| | - Da-Zhi Wang
- University of South Florida Health Heart Institute, Morsani College of Medicine, University of South Florida, 560 Channelside Drive, Tampa, FL 33602, USA
| | - Hua Zhu
- Department of Surgery, The Ohio State University, 396 Biomedical Research Tower, 460 W. 12th Avenue, Columbus, OH 43210, USA
| | - Zi-Jian Xie
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Sandrine V Pierre
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
| | - Liquan Cai
- Marshall Institute for Interdisciplinary Research (MIIR) at Marshall University, Huntington, WV 25703, USA
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Sodhi K, Pratt R, Wang X, Lakhani HV, Pillai SS, Zehra M, Wang J, Grover L, Henderson B, Denvir J, Liu J, Pierre S, Nelson T, Shapiro JI. Role of adipocyte Na,K-ATPase oxidant amplification loop in cognitive decline and neurodegeneration. iScience 2021; 24:103262. [PMID: 34755095 PMCID: PMC8564125 DOI: 10.1016/j.isci.2021.103262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 08/10/2021] [Accepted: 10/11/2021] [Indexed: 11/21/2022] Open
Abstract
Recent studies suggest that a western diet may contribute to clinical neurodegeneration and dementia. Adipocyte-specific expression of the Na,K-ATPase signaling antagonist, NaKtide, ameliorates the pathophysiological consequences of murine experimental obesity and renal failure. In this study, we found that a western diet produced systemic oxidant stress along with evidence of activation of Na,K-ATPase signaling within both murine brain and peripheral tissues. We also noted this diet caused increases in circulating inflammatory cytokines as well as behavioral, and brain biochemical changes consistent with neurodegeneration. Adipocyte specific NaKtide affected by a doxycycline on/off expression system ameliorated all of these diet effects. These data suggest that a western diet produces cognitive decline and neurodegeneration through augmented Na,K-ATPase signaling and that antagonism of this pathway in adipocytes ameliorates the pathophysiology. If this observation is confirmed in humans, the adipocyte Na,K-ATPase may serve as a clinical target in the therapy of neurodegenerative disorders.
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Affiliation(s)
- Komal Sodhi
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Rebecca Pratt
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Xiaoliang Wang
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Hari Vishal Lakhani
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Sneha S. Pillai
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Mishghan Zehra
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Jiayan Wang
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Lawrence Grover
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Brandon Henderson
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - James Denvir
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Jiang Liu
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Sandrine Pierre
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Thomas Nelson
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
| | - Joseph I. Shapiro
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
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Wang J, Wang X, Gao Y, Lin Z, Chen J, Gigantelli J, Shapiro JI, Xie Z, Pierre SV. Stress Signal Regulation by Na/K-ATPase As a New Approach to Promote Physiological Revascularization in a Mouse Model of Ischemic Retinopathy. Invest Ophthalmol Vis Sci 2021; 61:9. [PMID: 33275652 PMCID: PMC7718810 DOI: 10.1167/iovs.61.14.9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Purpose The identification of target pathways to block excessive angiogenesis while simultaneously restoring physiological vasculature is an unmet goal in the therapeutic management of ischemic retinopathies. pNaKtide, a cell-permeable peptide that we have designed by mapping the site of α1 Na/K-ATPase (NKA)/Src binding, blocks the formation of α1 NKA/Src/reactive oxygen species (ROS) amplification loops and restores physiological ROS signaling in a number of oxidative disease models. The aim of this study was to evaluate the importance of the NKA/Src/ROS amplification loop and the effect of pNaKtide in experimental ischemic retinopathy. Methods Human retinal microvascular endothelial cells (HRMECs) and retinal pigment epithelium (ARPE-19) cells were used to evaluate the effect of pNaKtide on viability, proliferation, and angiogenesis. Retinal toxicity and distribution were assessed in those cells and in the mouse. Subsequently, the role and molecular mechanism of NKA/Src in ROS stress signaling were evaluated biochemically in the retinas of mice exposed to the well-established protocol of oxygen-induced retinopathy (OIR). Finally, pNaKtide efficacy was assessed in this model. Results The results suggest a key role of α1 NKA in the regulation of ROS stress and the Nrf2 pathway in mouse OIR retinas. Inhibition of α1 NKA/Src by pNaKtide reduced pathologic ROS signaling and restored normal expression of hypoxia-inducible factor 1-α/vascular endothelial growth factor (VEGF). Unlike anti-VEGF agents, pNaKtide did promote retinal revascularization while inhibiting neovascularization and inflammation. Conclusions Targeting α1 NKA represents a novel strategy to develop therapeutics that not only inhibit neovascularization but also promote physiological revascularization in ischemic eye diseases.
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Affiliation(s)
- Jiayan Wang
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia, United States.,Departments of Medicine, Ophthalmology, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia, United States
| | - Xiaoliang Wang
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia, United States.,Departments of Medicine, Ophthalmology, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia, United States
| | - Yingnyu Gao
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia, United States
| | - Zhucheng Lin
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia, United States
| | - Jing Chen
- Department of Ophthalmology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States
| | - James Gigantelli
- Departments of Medicine, Ophthalmology, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia, United States
| | - Joseph I Shapiro
- Departments of Medicine, Ophthalmology, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia, United States
| | - Zijian Xie
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia, United States
| | - Sandrine V Pierre
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia, United States
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Quo vadis Cardiac Glycoside Research? Toxins (Basel) 2021; 13:toxins13050344. [PMID: 34064873 PMCID: PMC8151307 DOI: 10.3390/toxins13050344] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/07/2021] [Accepted: 05/08/2021] [Indexed: 12/16/2022] Open
Abstract
Cardiac glycosides (CGs), toxins well-known for numerous human and cattle poisoning, are natural compounds, the biosynthesis of which occurs in various plants and animals as a self-protective mechanism to prevent grazing and predation. Interestingly, some insect species can take advantage of the CG’s toxicity and by absorbing them, they are also protected from predation. The mechanism of action of CG’s toxicity is inhibition of Na+/K+-ATPase (the sodium-potassium pump, NKA), which disrupts the ionic homeostasis leading to elevated Ca2+ concentration resulting in cell death. Thus, NKA serves as a molecular target for CGs (although it is not the only one) and even though CGs are toxic for humans and some animals, they can also be used as remedies for various diseases, such as cardiovascular ones, and possibly cancer. Although the anticancer mechanism of CGs has not been fully elucidated, yet, it is thought to be connected with the second role of NKA being a receptor that can induce several cell signaling cascades and even serve as a growth factor and, thus, inhibit cancer cell proliferation at low nontoxic concentrations. These growth inhibitory effects are often observed only in cancer cells, thereby, offering a possibility for CGs to be repositioned for cancer treatment serving not only as chemotherapeutic agents but also as immunogenic cell death triggers. Therefore, here, we report on CG’s chemical structures, production optimization, and biological activity with possible use in cancer therapy, as well as, discuss their antiviral potential which was discovered quite recently. Special attention has been devoted to digitoxin, digoxin, and ouabain.
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Bejček J, Spiwok V, Kmoníčková E, Rimpelová S. Na +/K +-ATPase Revisited: On Its Mechanism of Action, Role in Cancer, and Activity Modulation. Molecules 2021; 26:molecules26071905. [PMID: 33800655 PMCID: PMC8061769 DOI: 10.3390/molecules26071905] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/18/2021] [Accepted: 03/24/2021] [Indexed: 01/08/2023] Open
Abstract
Maintenance of Na+ and K+ gradients across the cell plasma membrane is an essential process for mammalian cell survival. An enzyme responsible for this process, sodium-potassium ATPase (NKA), has been currently extensively studied as a potential anticancer target, especially in lung cancer and glioblastoma. To date, many NKA inhibitors, mainly of natural origin from the family of cardiac steroids (CSs), have been reported and extensively studied. Interestingly, upon CS binding to NKA at nontoxic doses, the role of NKA as a receptor is activated and intracellular signaling is triggered, upon which cancer cell death occurs, which lies in the expression of different NKA isoforms than in healthy cells. Two major CSs, digoxin and digitoxin, originally used for the treatment of cardiac arrhythmias, are also being tested for another indication—cancer. Such drug repositioning has a big advantage in smoother approval processes. Besides this, novel CS derivatives with improved performance are being developed and evaluated in combination therapy. This article deals with the NKA structure, mechanism of action, activity modulation, and its most important inhibitors, some of which could serve not only as a powerful tool to combat cancer, but also help to decipher the so-far poorly understood NKA regulation.
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Affiliation(s)
- Jiří Bejček
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague 6, Czech Republic; (J.B.); (V.S.)
| | - Vojtěch Spiwok
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague 6, Czech Republic; (J.B.); (V.S.)
| | - Eva Kmoníčková
- Department of Pharmacology, Second Faculty of Medicine, Charles University, Plzeňská 311, 150 00 Prague, Czech Republic;
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28 Prague 6, Czech Republic; (J.B.); (V.S.)
- Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 323 00 Pilsen, Czech Republic
- Correspondence: ; Tel.: +420-220-444-360
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Parreira GM, Faria JA, Marques SMS, Garcia IJP, Silva IF, De Carvalho LED, Villar JAFP, Machado MV, de Castro Lima M, Barbosa LA, Cortes VF, de Lima Santos H. The γ-Benzylidene Digoxin Derivative BD-15 Increases the α3-Na, K-ATPase Activity in Rat Hippocampus and Prefrontal Cortex and no Change on Heart. J Membr Biol 2021; 254:189-199. [PMID: 33598793 DOI: 10.1007/s00232-021-00173-2] [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: 08/28/2020] [Accepted: 01/13/2021] [Indexed: 02/06/2023]
Abstract
Our study aimed to investigate the effects of the new cardiotonic steroid BD-15 (γ-benzylidene derivatives) in the behavioral parameters, oxidative stress and the Na, K-ATPase activity in the hippocampus, prefrontal cortex and heart from rats to verify the safety and possible utilization in brain disorders. For this study, groups of male Wistar rats were used after intraperitoneal injection of 20, 100 and 200 µg/Kg with BD-15. The groups were treated for three consecutive days and the control group received 0.9% saline. BD-15 did not alter behavior of rats treated with different doses. An increase in the specific α2,3-Na, K-ATPase activity was observed for all doses of BD-15 tested in the hippocampus. However, in the prefrontal cortex, only the dose of 100 µg/Kg increased the activity of all Na, K-ATPase isoforms. BD-15 did not cause alteration in the lipid peroxidation levels in the hippocampus, but in the prefrontal cortex, a decrease of lipid peroxidation (~ 25%) was observed. In the hippocampus, GSH levels increased with all doses tested, while in the prefrontal cortex no changes were found. Subsequently, when the effect of BD-15 on cardiac tissue was analyzed, no changes were observed in the tested parameters. BD-15 at a dosage of 100 µg/Kg proved to be promising because it is considered therapeutic for brain disorders, since it increases the activity of the α3-Na, K-ATPase in the hippocampus and prefrontal cortex, as well as decreasing the oxidative stress in these brain regions. In addition, this drug did not cause changes in the tissues of the heart and kidneys, preferentially demonstrating specificity for the brain.
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Affiliation(s)
- Gabriela Machado Parreira
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil
| | - Jéssica Alves Faria
- Laboratório de Anatomia Humana, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Sarah Melo Silva Marques
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil
| | - Israel José Pereira Garcia
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil
| | - Isabella Ferreira Silva
- Laboratório de Processamento de Tecidos, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Luciana Estefani Drumond De Carvalho
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil
| | - José Augusto Ferreira Perez Villar
- Laboratório de Síntese Orgânica e Nanoestruturas, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Matthews Vieira Machado
- Laboratório de Síntese Orgânica e Nanoestruturas, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Maira de Castro Lima
- Laboratório de Anatomia Humana, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Leandro Augusto Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil
| | - Vanessa Faria Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil
| | - Hérica de Lima Santos
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, Zip Code: 35501-296, Brazil.
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Qu X, Zhang Z, Hu W, Lou M, Zhai B, Mei S, Hu Z, Zhang L, Liu D, Liu Z, Chen J, Wang Y. Attenuation of the Na/K‑ATPase/Src/ROS amplification signaling pathway by astaxanthin ameliorates myocardial cell oxidative stress injury. Mol Med Rep 2020; 22:5125-5134. [PMID: 33173978 PMCID: PMC7646965 DOI: 10.3892/mmr.2020.11613] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/27/2020] [Indexed: 12/27/2022] Open
Abstract
The 3S, 3′S-ASTaxanthin (3S, 3′S-AST) isomer has strong antioxidant activity; however, its protective roles and potential mechanisms against oxidative stress damage in cardiomyocytes have not been investigated. Na+/K+-ATPase (NKA)/Src signal activation has an important role in increasing reactive oxygen species (ROS) production. The aim of the present study was to investigate the protective effects and mechanism of 3S, 3′S-AST on hydrogen peroxide (H2O2)-induced oxidative stress injury in H9c2 myocardial cells. The protective effects of 3S, 3′S-AST on H2O2-induced H9c2 cell injury was observed by measuring lactate dehydrogenase and creatine kinase myocardial band content, cell viability and nuclear morphology. The antioxidant effect was investigated by analyzing ROS accumulation and malondialdehyde, glutathione (GSH) peroxidase, GSH and glutathione reductase activity levels. The protein expression levels of Bax, Bcl-2, caspase-3 and cleaved caspase-3 were analyzed using western blotting to determine cardiomyocyte apoptosis. Western blot analysis of the phosphorylation levels of Src and Erk1/2 were also performed to elucidate the molecular mechanism involved. The results showed that 3S, 3′S-AST reduced the release of LDH and promoted cell viability, and attenuated ROS accumulation and cell apoptosis induced by H2O2. Furthermore, 3S, 3′S-AST also restored apoptosis-related Bax and Bcl-2 protein expression levels in H2O2-treated H9c2 cells. The phosphorylation levels of Src and Erk1/2 were significantly higher in the H2O2 treatment group, whereas 3S, 3′S-AST pretreatment significantly decreased the levels of phosphorylated (p)-Src and p-ERK1/2. The results provided evidence that 3S, 3′S-AST exhibited a cardioprotective effect against oxidative stress injury by attenuating NKA/Src/Erk1/2-modulated ROS amplification.
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Affiliation(s)
- Xuefeng Qu
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Zhouyi Zhang
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Wenli Hu
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Minhan Lou
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Bingzhong Zhai
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Song Mei
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Zhihang Hu
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Lijing Zhang
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Dongying Liu
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Zhen Liu
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Jianguo Chen
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
| | - Yin Wang
- Zhejiang Academy of Medical Sciences, Hangzhou Medical College, Hangzhou, Zhejiang 310013, P.R. China
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Shematorova EK, Shpakovski GV. Current Insights in Elucidation of Possible Molecular Mechanisms of the Juvenile Form of Batten Disease. Int J Mol Sci 2020; 21:ijms21218055. [PMID: 33137890 PMCID: PMC7663513 DOI: 10.3390/ijms21218055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 12/14/2022] Open
Abstract
The neuronal ceroid lipofuscinoses (NCLs) collectively constitute one of the most common forms of inherited childhood-onset neurodegenerative disorders. They form a heterogeneous group of incurable lysosomal storage diseases that lead to blindness, motor deterioration, epilepsy, and dementia. Traditionally the NCL diseases were classified according to the age of disease onset (infantile, late-infantile, juvenile, and adult forms), with at least 13 different NCL varieties having been described at present. The current review focuses on classic juvenile NCL (JNCL) or the so-called Batten (Batten-Spielmeyer-Vogt; Spielmeyer-Sjogren) disease, which represents the most common and the most studied form of NCL, and is caused by mutations in the CLN3 gene located on human chromosome 16. Most JNCL patients carry the same 1.02-kb deletion in this gene, encoding an unusual transmembrane protein, CLN3, or battenin. Accordingly, the names CLN3-related neuronal ceroid lipofuscinosis or CLN3-disease sometimes have been used for this malady. Despite excessive in vitro and in vivo studies, the precise functions of the CLN3 protein and the JNCL disease mechanisms remain elusive and are the main subject of this review. Although the CLN3 gene is highly conserved in evolution of all mammalian species, detailed analysis of recent genomic and transcriptomic data indicates the presence of human-specific features of its expression, which are also under discussion. The main recorded to date changes in cell metabolism, to some extent contributing to the emergence and progression of JNCL disease, and human-specific molecular features of CLN3 gene expression are summarized and critically discussed with an emphasis on the possible molecular mechanisms of the malady appearance and progression.
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Affiliation(s)
- Elena K. Shematorova
- Laboratory of Mechanisms of Gene Expression, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia;
- National Research Center “Kurchatov Institute”, 1, Academika Kurchatova pl., 123182 Moscow, Russia
| | - George V. Shpakovski
- Laboratory of Mechanisms of Gene Expression, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia;
- National Research Center “Kurchatov Institute”, 1, Academika Kurchatova pl., 123182 Moscow, Russia
- Correspondence: ; Tel.: +7-(495)-330-4953; Fax: +7-(495)-335-7103
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Petrushanko IY, Mitkevich VA, Makarov AA. Molecular Mechanisms of the Redox Regulation of the Na,K-ATPase. Biophysics (Nagoya-shi) 2020. [DOI: 10.1134/s0006350920050139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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17
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Sun J, Chen L, Jiang P, Duan B, Wang R, Xu J, Liu W, Xu Y, Xie Z, Feng F, Qu W. Phenylethanoid glycosides of Callicarpa kwangtungensis Chun exert cardioprotective effect by weakening Na +-K +-ATPase/Src/ERK1/2 pathway and inhibiting apoptosis mediated by oxidative stress and inflammation. JOURNAL OF ETHNOPHARMACOLOGY 2020; 258:112881. [PMID: 32311484 DOI: 10.1016/j.jep.2020.112881] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 04/05/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Callicarpa kwangtungensis Chun (C. kwangtungensis) is a very famous herbal medicine with the function of promoting blood circulation and removing blood stasis which is beneficial for cardiovascular disease (CVD). Phenylethanoid glycosides (PGs) are the major class of active ingredients in C. kwangtungensis and present significant anti-oxidative and anti-inflammatory property related to apoptosis. Therefore, this study aimed to investigate the effects of total phenylethanoid glycosides of C. kwangtungensis (CK-PGs) on isoproterenol (ISO) induced myocardial ischemic injury (MI) and the mechanisms related to the apoptosis mediated by oxidative damage and inflammation. METHODS The myocardial ischemia animal model was established as subcutaneous injecting ISO. Echocardiography and biomarkers were employed to determine the degree of myocardial damage. Histopathological changes were observed by hematoxylin and eosin test. The TUNEL staining and activity of caspase-3 were measured to detect the level of apoptosis which is medicated by the oxidative damage detected by the level of MDA, GSH and ROS tested with the kit and the inflammation reflected by TNF-α. The activity of Na+-K+-ATPase (NKA) was detected by the commercial kits, whose expression was measured by immunohistochemistry analysis. At last, Western blot analysis was used to measure Na+-K+-ATPase/Src/ERK1/2 and Bax/Bcl-2 pathway. RESULTS CK-PGs showed cardioprotective effect against ISO-induced myocardial ischemic injury evidenced by improving heart function and lowering myocardial injury markers. CK-PGs could inhibit the level of apoptosis as shown by the decrease of the TUNEL-positive cells, the activity of caspase-3 and increase of the expression of Bax. CK-PGs also reduced oxidative stress and inflammation to suppress apoptosis by decreasing the level of ROS, MDA, and increasing GSH activity and lowering the level of TNF-α. In addition, CK-PGs exerted the protection by increasing the activity and the expression of NKA. Meanwhile, Na+-K+-ATPase/Src/ERK1/2pathway was weakened for the inhibition of apoptosis. CONCLUSIONS CK-PGs could protect cardiomyocytes from myocardial injury through suppressing Na+-K+-ATPase/Src/ERK1/2 pathway and inhibiting apoptosis mediated by oxidative stress and inflammation.
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Affiliation(s)
- Jing Sun
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Lei Chen
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, People's Republic of China
| | - Pan Jiang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China; Jiangsu Food and Pharmaceutical Science College, Huaian, 223003, People's Republic of China
| | - Bingjing Duan
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Ruyi Wang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Jian Xu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Wenyuan Liu
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Yunhui Xu
- Marshall Institute for Interdisciplinary Research, Marshall University, West Virginia, USA
| | - Zijian Xie
- Marshall Institute for Interdisciplinary Research, Marshall University, West Virginia, USA
| | - Feng Feng
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China; Jiangsu Food and Pharmaceutical Science College, Huaian, 223003, People's Republic of China.
| | - Wei Qu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China.
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Sodhi K, Wang X, Chaudhry MA, Lakhani HV, Zehra M, Pratt R, Nawab A, Cottrill CL, Snoad B, Bai F, Denvir J, Liu J, Sanabria JR, Xie Z, Abraham NG, Shapiro JI. Central Role for Adipocyte Na,K-ATPase Oxidant Amplification Loop in the Pathogenesis of Experimental Uremic Cardiomyopathy. J Am Soc Nephrol 2020; 31:1746-1760. [PMID: 32587074 PMCID: PMC7460907 DOI: 10.1681/asn.2019101070] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 04/28/2020] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Oxidative stress in adipocyte plays a central role in the pathogenesis of obesity as well as in the associated cardiovascular complications. The putative uremic toxin indoxyl sulfate induces oxidative stress and dramatically alters adipocyte phenotype in vitro. Mice that have undergone partial nephrectomy serve as an experimental model of uremic cardiomyopathy. This study examined the effects on adipocytes of administering a peptide that reduces oxidative stress to the mouse model. METHODS A lentivirus vector introduced the peptide NaKtide with an adiponectin promoter into the mouse model of experimental uremic cardiomyopathy, intraperitoneally. Then adipocyte-specific expression of the peptide was assessed for mice fed a standard diet compared with mice fed a western diet enriched in fat and fructose. RESULTS Partial nephrectomy induced cardiomyopathy and anemia in the mice, introducing oxidant stress and an altered molecular phenotype of adipocytes that increased production of systemic inflammatory cytokines instead of accumulating lipids, within 4 weeks. Consumption of a western diet significantly worsened the adipocyte oxidant stress, but expression of NaKtide in adipocytes completely prevented the worsening. The peptide-carrying lentivirus achieved comparable expression in skeletal muscle, but did not ameliorate the disease phenotype. CONCLUSIONS Adipocyte-specific expression of NaKtide, introduced with a lentiviral vector, significantly ameliorated adipocyte dysfunction and uremic cardiomyopathy in partially nephrectomized mice. These data suggest that the redox state of adipocytes controls the development of uremic cardiomyopathy in mice subjected to partial nephrectomy. If confirmed in humans, the oxidative state of adipocytes may be a therapeutic target in chronic renal failure.
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Affiliation(s)
- Komal Sodhi
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Xiaoliang Wang
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Muhammad Aslam Chaudhry
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Hari Vishal Lakhani
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Mishghan Zehra
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Rebecca Pratt
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Athar Nawab
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Cameron L. Cottrill
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Brian Snoad
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Fang Bai
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - James Denvir
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Jiang Liu
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Juan R. Sanabria
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Zijian Xie
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| | - Nader G. Abraham
- Departments of Medicine and Pharmacology, New York Medical College, Valhalla, New York
| | - Joseph I. Shapiro
- Departments of Medicine, Surgery, and Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
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Jin X, Wang J, Zou S, Xu R, Cao J, Zhang Y, Guo J, Wen X, Deng S, Zheng Y, Zhu Y, Wang F, Xu Z. Cinobufagin Triggers Defects in Spindle Formation and Cap-Dependent Translation in Liver Cancer Cells by Inhibiting the AURKA-mTOR-eIF4E Axis. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2020; 48:651-678. [PMID: 32349518 DOI: 10.1142/s0192415x20500330] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cinobufagin is a Na+/K+-ATPase (NKA) inhibitor with excellent anticancer effects to prolong the survival of patients. The purpose of the present study was to clarify the underlying mechanism of the anticancer effects of cinobufagin using overexpression or inhibition of aurora kinase A (AURKA) signaling. First, high expression of Na+/K+-ATPase alpha 1 subunit (ATP1A1) and AURAK resulted in increased malignant transformation in hepatocellular carcinoma (HCC) patients using the cancer genome atlas (TCGA) data and tissue samples. After treatment with cinobufagin, we successfully screened 202, 249, and 335 changing expression proteins in Huh-7 cells under normal, overexpression, and inhibition of AURKA using tandem mass tags (TMT)-labeled quantitative proteomics coupled to 2D liquid chromatography-tandem mass spectrometry (LC-MS/MS). Bioinformatics analysis revealed that these molecules were closely associated with chromosome segregation, DNA damage, and regulation of translation processes. We further confirmed that cinobufagin induced DNA damage and chromosome segregation disorders and suppresses translational processing in oncogenes by decreasing the expression of AURKA, mechanistic target of rapamycin kinase (mTOR), p-mTOR, p-extracellular regulated protein kinases (ERK), eukaryotic translation initiation factor 4E (eIF4E), and p-eIF4E, while increasing the expression of p-eukaryotic translation initiation factor 4E binding protein 1 (4E-BP1) (S65, T37, T46, T45) and increasing the interaction between eIF4 and 4E-BP1. Our results suggested that cinobufagin performed an antitumor effects in liver cancer cells by inhibiting the AURKA-mTOR-eIF4E axis.
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Affiliation(s)
- Xiaohan Jin
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Jiabao Wang
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Shuang Zou
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Ruicheng Xu
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Jin Cao
- Department of Gastroenterology and Hepatology, Third Central Hospital of Tianjin, Tianjin City 300170, P. R. China
| | - Yan Zhang
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Jia Guo
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Xiaochang Wen
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Sanmin Deng
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
| | - Yupiao Zheng
- Department of Gastroenterology and Hepatology, Third Central Hospital of Tianjin, Tianjin City 300170, P. R. China
| | - Yu Zhu
- Department of Clinical Laboratory, Tianjin Key Laboratory of Cerebral Vessels and Neurodegenerative Diseases, Tianjin Huanhu Hospital, Tianjin City 300350, P. R. China
| | - Fengmei Wang
- Department of Gastroenterology and Hepatology, Third Central Hospital of Tianjin, Tianjin City 300170, P. R. China
| | - Zhongwei Xu
- Central Laboratory, Logistics University of Chinese People’s Armed Police Force, Tianjin City 300309, P. R. China
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The Na/K-ATPase α1 and c-Src form signaling complex under native condition: A crosslinking approach. Sci Rep 2020; 10:6006. [PMID: 32265464 PMCID: PMC7138855 DOI: 10.1038/s41598-020-61920-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 03/04/2020] [Indexed: 11/09/2022] Open
Abstract
The protein-protein interactions amongst the Na/K-ATPase α1 subunit, c-Src, and caveolin-1 (cav-1) are essential for the Na/K-ATPase signaling functions. However, there are arguments concerning the interaction model. The present study aims to clarify the interactions amongst the endogenous native proteins in live cells under native resting condition. Under native condition, Blue Native-PAGE and Blue Native-PAGE/SDS-PAGE 2D analyses demonstrated co-existence of the α1 subunit and c-Src in same protein complex, as well as a direct interaction between the α1 subunit and c-Src. By comparison of cleavable and non-cleavable cysteine-cysteine crosslinked samples, capillary immunoblotting analysis demonstrated that depletion of Src kinase family members (c-Src, Yes, and Fyn) or cav-1 clearly reduced the interactions of the α1 subunit with proteins, but depletion of cav-1 did not affect the interaction of c-Src with the α1 subunit. The data indicated that there are direct interactions between the α1 subunit and c-Src as well as between the α1 subunit and cav-1, but argued about the interaction between c-Src and cav-1 under the condition. Furthermore, the data also indicated the existence of different protein complexes containing the α1 subunit and c-Src, which might have different signaling functions.
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Liu J, Nie Y, Chaudhry M, Bai F, Chuang J, Sodhi K, Shapiro JI. The Redox-Sensitive Na/K-ATPase Signaling in Uremic Cardiomyopathy. Int J Mol Sci 2020; 21:ijms21041256. [PMID: 32069992 PMCID: PMC7072896 DOI: 10.3390/ijms21041256] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/10/2020] [Accepted: 02/10/2020] [Indexed: 02/07/2023] Open
Abstract
In recent years, Na/K-ATPase signaling has been implicated in different physiological and pathophysiological conditions, including cardiac hypertrophy and uremic cardiomyopathy. Cardiotonic steroids (CTS), specific ligands of Na/K-ATPase, regulate its enzymatic activity (at higher concentrations) and signaling function (at lower concentrations without significantly affecting its enzymatic activity) and increase reactive oxygen species (ROS) generation. On the other hand, an increase in ROS alone also regulates the Na/K-ATPase enzymatic activity and signaling function. We termed this phenomenon the Na/K-ATPase-mediated oxidant-amplification loop, in which oxidative stress regulates both the Na/K-ATPase activity and signaling. Most recently, we also demonstrated that this amplification loop is involved in the development of uremic cardiomyopathy. This review aims to evaluate the redox-sensitive Na/K-ATPase-mediated oxidant amplification loop and uremic cardiomyopathy.
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Affiliation(s)
- Jiang Liu
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (Y.N.); (M.C.); (F.B.)
- Correspondence:
| | - Ying Nie
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (Y.N.); (M.C.); (F.B.)
| | - Muhammad Chaudhry
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (Y.N.); (M.C.); (F.B.)
| | - Fang Bai
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (Y.N.); (M.C.); (F.B.)
| | - Justin Chuang
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (J.C.); (K.S.); (J.I.S.)
| | - Komal Sodhi
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (J.C.); (K.S.); (J.I.S.)
| | - Joseph I. Shapiro
- Department of Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA; (J.C.); (K.S.); (J.I.S.)
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22
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Pratt R, Lakhani HV, Zehra M, Desauguste R, Pillai SS, Sodhi K. Mechanistic Insight of Na/K-ATPase Signaling and HO-1 into Models of Obesity and Nonalcoholic Steatohepatitis. Int J Mol Sci 2019; 21:ijms21010087. [PMID: 31877680 PMCID: PMC6982200 DOI: 10.3390/ijms21010087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 12/18/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023] Open
Abstract
Obesity is a multifaceted pathophysiological condition that has been associated with lipid accumulation, adipocyte dysfunction, impaired mitochondrial biogenesis and an altered metabolic profile. Redox imbalance and excessive release of inflammatory mediators have been intricately linked in obesity-associated phenotypes. Hence, understanding the mechanisms of redox signaling pathways and molecular targets exacerbating oxidative stress is crucial in improving health outcomes. The activation of Na/K-ATPase/Src signaling, and its downstream pathways, by reactive oxygen species (ROS) has been recently implicated in obesity and subsequent nonalcoholic steatohepatitis (NASH), which causes further production of ROS creating an oxidant amplification loop. Apart from that, numerous studies have also characterized antioxidant properties of heme oxygenase 1 (HO-1), which is suppressed in an obese state. The induction of HO-1 restores cellular redox processes, which contributes to inhibition of the toxic milieu. The novelty of these independent mechanisms presents a unique opportunity to unravel their potential as molecular targets for redox regulation in obesity and NASH. The attenuation of oxidative stress, by understanding the underlying molecular mechanisms and associated mediators, with a targeted treatment modality may provide for improved therapeutic options to combat clinical disorders.
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Affiliation(s)
| | | | | | | | | | - Komal Sodhi
- Correspondence: ; Tel.: +1-(304)-691-1704; Fax: +1-(914)-347-4956
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Li S, Jiang X, Luo Y, Zhou B, Shi M, Liu F, Sha A. Sodium/calcium overload and Sirt1/Nrf2/OH-1 pathway are critical events in mercuric chloride-induced nephrotoxicity. CHEMOSPHERE 2019; 234:579-588. [PMID: 31229719 DOI: 10.1016/j.chemosphere.2019.06.095] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 05/20/2019] [Accepted: 06/12/2019] [Indexed: 06/09/2023]
Abstract
Mercury (Hg), a significant toxic metal for nephrotoxicity, can be found in food (vegetable and seafood) and drinking water by contamination. Oxidative stress is involved in inorganic Hg-induced nephrotoxicity, but the Sirtuin1 (Sirt1)/Nrf2/OH-1 pathway and sodium (Na)/calcium (Ca) ions actions in mercuric chloride (HgCl2)-induced nephrotoxicity remains unclear to date. In this study, Kunming mice were treated HgCl2 (5 mg/kg) for 24 h to evaluate potential mechanism. Here, along with Sirt1 activation, pale kidney, hisologic conditions, typical apoptotic changes and TUNEL positive nuclei were observed under acute HgCl2 exposure. Specifically, although HgCl2 increased the expression of Nrf2, Keap1, OH-1 and NQO1, the mRNA levels of GSS, GCLC and GCLM showed no significant alterations in mice kidney. Moreover, mice exposed to HgCl2 decreased the concentrations of Mg, K, P, Mn, Fe, Zn, and elevated Na, Ca, Cu and Se in kidney. It was also observed that HgCl2 suppressed the ATPases (Na+-K+-ATPase, Ca2+-ATPase, Mg2+-ATPase and Ca2+-Mg2+-ATPase) activities and decreased the mRNA levels of Atp1a1, Atp1a2 in the kidney. Further study showed that HgCl2 elevated Na+ concentrations by markedly increased the mRNA levels of Na+ transporter. The present study revealed that HgCl2 induced Sirt1/Nrf2/OH-1 pathway activation while did not inhibit apoptosis in kidney of mice. Additionally, HgCl2 regulates Na+ concentrations, which might create secondary disorders in absorption and excretion of other ions. Altogether we assume that Sirt1/Nrf2/Na+/Ca2+ pathway might be a potential therapeutic target for treating acute HgCl2 induced nephrotoxicity.
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Affiliation(s)
- Siwen Li
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China.
| | - Xia Jiang
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Yonghong Luo
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Bingru Zhou
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Mei Shi
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Fangyuan Liu
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Ailong Sha
- Department of Physiology, College of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
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24
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Xie JX, Zhang S, Cui X, Zhang J, Yu H, Khalaf FK, Malhotra D, Kennedy DJ, Shapiro JI, Tian J, Haller ST. Na/K-ATPase/src complex mediates regulation of CD40 in renal parenchyma. Nephrol Dial Transplant 2019; 33:1138-1149. [PMID: 29294050 DOI: 10.1093/ndt/gfx334] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 11/07/2017] [Indexed: 02/07/2023] Open
Abstract
Background Recent studies have highlighted a critical role for CD40 in the pathogenesis of renal injury and fibrosis. However, little is currently understood about the regulation of CD40 in this setting. Methods We use novel Na/K-ATPase cell lines and inhibitors in order to demonstrate the regulatory function of Na/K-ATPase with regards to CD40 expression and function. We utilize 5/6 partial nephrectomy as well as direct infusion of a Na/K-ATPase ligand to demonstrate this mechanism exists in vivo. Results We demonstrate that knockdown of the α1 isoform of Na/K-ATPase causes a reduction in CD40 while rescue of the α1 but not the α2 isoform restores CD40 expression in renal epithelial cells. Second, because the major functional difference between α1 and α2 is the ability of α1 to form a functional signaling complex with Src, we examined whether the Na/K-ATPase/Src complex is important for CD40 expression. We show that a gain-of-Src binding α2 mutant restores CD40 expression while loss-of-Src binding α1 reduces CD40 expression. Furthermore, loss of a functional Na/K-ATPase/Src complex also disrupts CD40 signaling. Importantly, we show that use of a specific Na/K-ATPase/Src complex antagonist, pNaKtide, can attenuate cardiotonic steroid (CTS)-induced induction of CD40 expression in vitro. Conclusions Because the Na/K-ATPase/Src complex is also a key player in the pathogenesis of renal injury and fibrosis, our new findings suggest that Na/K-ATPase and CD40 may comprise a pro-fibrotic feed-forward loop in the kidney and that pharmacological inhibition of this loop may be useful in the treatment of renal fibrosis.
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Affiliation(s)
- Jeffrey X Xie
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Shungang Zhang
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Xiaoyu Cui
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, USA
| | - Jue Zhang
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Yu
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fatimah K Khalaf
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Deepak Malhotra
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - David J Kennedy
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Joseph I Shapiro
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV, USA
| | - Jiang Tian
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Steven T Haller
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
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The Adipocyte Na/K-ATPase Oxidant Amplification Loop is the Central Regulator of Western Diet-Induced Obesity and Associated Comorbidities. Sci Rep 2019; 9:7927. [PMID: 31138824 PMCID: PMC6538745 DOI: 10.1038/s41598-019-44350-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/10/2019] [Indexed: 12/29/2022] Open
Abstract
Obesity has become a worldwide epidemic. We have previously reported that systemic administration of pNaKtide which targets the Na/K-ATPase oxidant amplification loop (NKAL) was able to decrease systemic oxidative stress and adiposity in mice fed a high fat and fructose supplemented western diet (WD). As adipocytes are believed to play a central role in the development of obesity and its related comorbidities, we examined whether lentiviral-mediated adipocyte-specific expression of NaKtide, a peptide derived from the N domain of the alpha1 Na/K-ATPase subunit, could ameliorate the effects of the WD. C57BL6 mice were fed a WD, which activated Na/K-ATPase signaling in the adipocytes and induced an obese phenotype and caused an increase in plasma levels of leptin, IL-6 and TNFα. WD also decreased locomotor activity, expression of the D2 receptor and tyrosine hydroxylase in brain tissue, while markers of neurodegeneration and neuronal apoptosis were increased following the WD. Selective adipocyte expression of NaKtide in these mice fed a WD attenuated all of these changes including the brain biochemical alterations and behavioral adaptations. These data suggest that adipocyte derived cytokines play an essential role in the development of obesity induced by a WD and that targeting the adipocyte NKAL loop may serve as an effective therapeutic strategy.
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Chen L, Jiang P, Li J, Xie Z, Xu Y, Qu W, Feng F, Liu W. Periplocin promotes wound healing through the activation of Src/ERK and PI3K/Akt pathways mediated by Na/K-ATPase. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 57:72-83. [PMID: 30668325 DOI: 10.1016/j.phymed.2018.12.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/01/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Periploca forrestii(PF) is mainly utilized for treatment of arthritis and traumatic injury historically. We had previously demonstrated that a fraction rich in cardiotonic steroids isolated from PF had the potential to facilitate wound healing. However, the exact material basis and mechanism of action responsible for wound healing is still unclear. Periplocin(PP) is the highest level of cardiotonic steroid included in PF. The present study aims to evaluate the efficacy of periplocin on wound healing systematically in vitro and in vivo. MATERIALS AND METHODS The L929 proliferation was determined by both MTT and EdU assay. Cell migration was tested by both scratch and transwell assay. The total amount of soluble collagen was assessed using a Sircol Collagen Assay Kit. The wound healing activity was evaluated in vivo using the excision rat models. Histopathology of the wounded skin on day 9 was studied via hematoxylin and eosin staining (HE) for general morphological observations and masson's trichrome staining for collagen deposition, respectively. The alteration in Src/ERK and PI3K/Akt pathways mediated by Na/K-ATPase was determined by western blot after the treatment with periplocin. The interaction between Na/K-ATPase and Src was tested by immunoprecipitation and immunostaining analysis. RESULTS The results revealed that periplocin could significantly boost proliferation, migration and stimulate collagen production in fibroblast L929 cells, which is dependent on activation of Src/ERK and PI3K/Akt pathways mediated by Na/K-ATPase, and thus promoting wound healing. Indeed, inhibition of Na/K-ATPase/Src complex receptor by Src specific inhibitor or knocking down the Na/K-ATPase expression would abolish the subsequent activation of Src/ERK and PI3K/Akt pathways and attenuate periplocin-induced beneficial effects on wound healing. Additionally, the wound healing activity is also confirmed in a rat excisional wound model as evidenced by increased rate of wound closure, reepithelization, formation of granulation tissue and collagen accumulation. CONCLUSIONS Collectively, we lay the rationale for traditional usage for traumatic injury, suggesting that periplocin and periploca forrestii is a promising candidate for management of chronic wounds.
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Affiliation(s)
- Lei Chen
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China
| | - Pan Jiang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 211198, China
| | - Jinsong Li
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China
| | - Zijian Xie
- Department of Physiology and Pharmacology, Mail Stop 1008, College of Medicine, University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Yunhui Xu
- Department of Physiology and Pharmacology, Mail Stop 1008, College of Medicine, University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Wei Qu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 211198, China
| | - Feng Feng
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 211198, China; Jiangsu Food & Pharmaceutical Science College, 4 Meicheng Donglu, Huaian 223003, China.
| | - Wenyuan Liu
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China.
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Abstract
The Na,K-ATPase is an enzyme essential for ion homeostasis in all cells. Over the last decades, it has been well-established that in addition to the transport of Na+/K+ over the cell membrane, the Na,K-ATPase acts as a receptor transducing humoral signals intracellularly. It has been suggested that ouabain-like compounds serve as endogenous modulators of this Na,K-ATPase signal transduction. The molecular mechanisms underlying Na,K-ATPase signaling are complicated and suggest the confluence of divergent biological pathways. This review discusses recent updates on the Na,K-ATPase signaling pathways characterized or suggested in vascular smooth muscle cells. The conventional view on this signaling is based on a microdomain structure where the Na,K-ATPase controls the Na,Ca-exchanger activity via modulation of intracellular Na+ in the spatially restricted submembrane space. This, in turn, affects intracellular Ca2+ and Ca2+ load in the sarcoplasmic reticulum leading to modulation of contractility as well as gene expression. An ion-transport-independent signal transduction from the Na,K-ATPase is based on molecular interactions. This was primarily characterized in other cell types but recently also demonstrated in vascular smooth muscles. The downstream signaling from the Na,K-ATPase includes Src and phosphatidylinositol-4,5-bisphosphate 3 kinase signaling pathways and generation of reactive oxygen species. Moreover, in vascular smooth muscle cells the interaction between the Na,K-ATPase and proteins responsible for Ca2+ homeostasis, e.g., phospholipase C and inositol triphosphate receptors, contributes to an integration of the signaling pathways. Recent update on the Na,K-ATPase dependent intracellular signaling and the significance for physiological functions and pathophysiological changes are discussed in this review.
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Wang J, Ullah SH, Li M, Zhang M, Zhang F, Zheng J, Yan X. DR region specific antibody ameliorated but ouabain worsened renal injury in nephrectomized rats through regulating Na,K-ATPase mediated signaling pathways. Aging (Albany NY) 2019; 11:1151-1162. [PMID: 30807290 PMCID: PMC6402514 DOI: 10.18632/aging.101815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/01/2019] [Indexed: 04/11/2023]
Abstract
Reduced Na+-K+-ATPase function is reported in various renal diseases. This implies that increase of Na+-K+-ATPase function may be a new target in treatment of renal injury. We previously reported that Na+-K+-ATPase was stabilized by DRm217, a specific antibody against DR region of Na+-K+-ATPase. In this study, we compared the protective effect of DRm217 and ouabain on kidney in a chronic kidney disease rat model and investigated the mechanism under it. We found that DRm217 improved renal function, alleviated glomerulus atrophy, inhibited renal tubular cells apoptosis, tubulointerstitial injury and renal fibrosis in 5/6 nephrectomized rats. Contrary to DRm217, ouabain worsened renal damage. Activated Na+-K+-ATPase /Src signaling pathway, increased oxidant stress and activated inflammasome were responsible for nephrectomized or ouabain-induced renal injury. DRm217 inhibited Na+-K+-ATPase /Src signaling pathway, retarded oxidant stress, suppressed inflammasome activation, and improved renal function, suggesting a novel approach to prevent renal damage.
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Affiliation(s)
- Juan Wang
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
- Department of Pathology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
- Department of Pathology, Ankang Central Hostipal, An’kang 725000, China
| | - Sayyed Hanif Ullah
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Meihe Li
- Hospital of Nephrology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Miao Zhang
- Hospital of Nephrology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Fujun Zhang
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Jin Zheng
- Hospital of Nephrology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
| | - Xiaofei Yan
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
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Shematorova EK, Shpakovski DG, Chernysheva AD, Shpakovski GV. Molecular mechanisms of the juvenile form of Batten disease: important role of MAPK signaling pathways (ERK1/ERK2, JNK and p38) in pathogenesis of the malady. Biol Direct 2018; 13:19. [PMID: 30621751 PMCID: PMC6889328 DOI: 10.1186/s13062-018-0212-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/30/2018] [Indexed: 11/10/2022] Open
Abstract
Background Mutations in the CLN3 gene lead to so far an incurable juvenile-onset neuronal ceroid lipofuscinosis (JNCL) or Batten disease that starts at the age of 4–6 years with a progressive retinopathy leading to blindness. Motor disturbances, epilepsy and dementia manifest during several following years. Most JNCL patients carry the same 1.02-kb deletion in the CLN3 gene, encoding an unusual transmembrane protein, CLN3 or battenin. Results Based on data of genome-wide expression profiling in CLN3 patients with different rate of the disease progression [Mol. Med., 2011, 17: 1253–1261] and our bioinformatic analysis of battenin protein-protein interactions in neurons we propose that CLN3 can function as a molecular chaperone for some plasma membrane proteins, being crucially important for their correct folding in endoplasmic reticulum. Changes in spatial structure of these membrane proteins lead to transactivation of the located nearby receptors. Particularly, CLN3 interacts with a subunit of Na/K ATPase ATP1A1 which changes its conformation and activates the adjacent epidermal growth factor receptor (EGFR). As a result, a large amount of erroneously activated EGFR generates MAPK signal cascades (ERK1/ERK2, JNKs and p38) from cell surface eventually causing neurons’ death. Conclusions Molecular mechanism of the juvenile form of Batten disease (JNCL), which is based on the excessive activation of signaling cascades in a time of the radical increase of neuronal membranes’ area in the growing brain, have been proposed and substantiated. The primary cause of this phenomenon is the defective function of the CLN3 protein that could not act properly as molecular chaperone for some plasma membrane proteins in the endoplasmic reticulum. The incorrect three-dimensional structure of at least one such protein, ATP1A1, leads to unregulated spontaneous and repetitive activation of the SRC kinase that transactivates EGFR with the subsequent uncontrolled launch of various MAPK cascades. Possible ways of treatment of patients with JNCL have been suggested. Reviewers This article was reviewed by Konstantinos Lefkimmiatis, Eugene Koonin and Vladimir Poroikov.
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Affiliation(s)
- Elena K Shematorova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, GSP-7, 117997, Moscow, Russia.
| | - Dmitry G Shpakovski
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, GSP-7, 117997, Moscow, Russia
| | - Anna D Chernysheva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, GSP-7, 117997, Moscow, Russia
| | - George V Shpakovski
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, GSP-7, 117997, Moscow, Russia.
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Kurauchi Y, Noma K, Hisatsune A, Seki T, Katsuki H. Na +, K +-ATPase inhibition induces neuronal cell death in rat hippocampal slice cultures: Association with GLAST and glial cell abnormalities. J Pharmacol Sci 2018; 138:167-175. [PMID: 30322800 DOI: 10.1016/j.jphs.2018.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/27/2018] [Accepted: 09/11/2018] [Indexed: 12/20/2022] Open
Abstract
Na+, K+-ATPase is a highly expressed membrane protein. Dysfunction of Na+, K+-ATPase has been implicated in the pathophysiology of several neurodegenerative and psychiatric disorders, however, the underlying mechanism of neuronal cell death resulting from Na+, K+-ATPase dysfunction is poorly understood. Here, we investigated the mechanism of neurotoxicity due to Na+, K+-ATPase inhibition using rat organotypic hippocampal slice cultures. Treatment with ouabain, a Na+, K+-ATPase inhibitor, increased the ratio of propidium iodide-positive cells among NeuN-positive cells in the hippocampal CA1 region, which was prevented by MK-801 and d-AP5, specific blockers of the N-methyl-d-aspartate (NMDA) receptor. EGTA, a Ca2+-chelating agent, also protected neurons from ouabain-induced injury. We observed that astrocytes expressed the glutamate aspartate transporter (GLAST), and ouabain changed the immunoreactive area of GFAP-positive astrocytes as well as GLAST. We also observed that ouabain increased the number of Iba1-positive microglial cells in a time-dependent manner. Furthermore, lithium carbonate, a mood-stabilizing drug, protected hippocampal neurons and reduced disturbances of astrocytes and microglia after ouabain treatment. Notably, lithium carbonate improved ouabain-induced decreases in GLAST intensity in astrocytes. These results suggest that glial cell abnormalities resulting in excessive extracellular concentrations of glutamate contribute to neurotoxicity due to Na+, K+-ATPase dysfunction in the hippocampal CA1 region.
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Affiliation(s)
- Yuki Kurauchi
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan
| | - Kazuki Noma
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan
| | - Akinori Hisatsune
- Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto 860-8555, Japan; Program for Leading Graduate Schools "HIGO (Health Life Science: Interdisciplinary and Glocal Oriented) Program", Kumamoto University, Kumamoto 862-0973, Japan
| | - Takahiro Seki
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan
| | - Hiroshi Katsuki
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan.
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Uremic Toxins Activates Na/K-ATPase Oxidant Amplification Loop Causing Phenotypic Changes in Adipocytes in In Vitro Models. Int J Mol Sci 2018; 19:ijms19092685. [PMID: 30201874 PMCID: PMC6164729 DOI: 10.3390/ijms19092685] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/31/2018] [Accepted: 09/06/2018] [Indexed: 02/07/2023] Open
Abstract
Background: Oxidant stress plays a key role in the development of chronic kidney disease (CKD). Experimental CKD leads to accumulation of uremic toxins (UT) in the circulation resulting in increased ROS production, which in turn, is known to activate the Na/K-ATPase/ROS amplification loop. Studies in a murine model of obesity have shown that increased oxidative stress in plasma is due to increased ROS and cytokine production from dysfunctional adipocytes. Therefore, we hypothesized that adipocytes exposed to UTs will activate the Na/K-ATPase oxidant amplification loop causing redox imbalance and phenotypic alterations in adipocytes. We also aimed to demonstrate that the Na/K-ATPase signaling antagonist, pNaKtide, attenuates these pathophysiological consequences. Methods: In the first set of experiments, 3T3-L1 murine pre-adipocytes were treated with varying concentrations of UTs, indoxyl sulfate (IS) (50, 100 and 250 µM) and p-cresol (50, 100 and 200 µM), with or without pNaKtide (0.7 µM) for five days in adipogenic media, followed by Oil Red O staining to study adipogenesis. RT-PCR analysis was performed to study expression of adipogenic, apoptotic and inflammatory markers, while DHE staining evaluated the superoxide levels in UT treated cells. In a second set of experiments, visceral fat was obtained from the West Virginian population. MSCs were isolated and cultured in adipogenic media for 14 days, which was treated with indoxyl sulfate (0, 25, 50 and 100 µM) with or without pNaKtide (1 µM). MSC-derived adipocytes were evaluated for morphological and molecular analysis of the above markers. Results: Our results demonstrated that 3T3-L1 cells and MSCs-derived adipocytes, treated with UTs, exhibited a significant decrease in adipogenesis and apoptosis through activation of the Na/K-ATPase/ROS amplification loop. The treatment with pNaKtide in 3T3-L1 cells and MSC-derived adipocytes negated the effects of UTs and restored cellular redox in adipocytes. We noted a varying effect of pNaKtide, in adipocytes treated with UTs, on inflammatory markers, adipogenic marker and superoxide levels in 3T3-L1 cells and MSC-derived adipocytes. Conclusions: This study demonstrates for the first time that the Na/K-ATPase/ROS amplification loop activated by elevated levels of UTs has varying effect on phenotypic alterations in adipocytes in various in vitro models. Thus, we propose that, if proven in humans, inhibition of Na/K-ATPase amplification of oxidant stress in CKD patients may ultimately be a novel way to combat adipocyte dysfunction and metabolic imbalance in these patients.
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The Na/K-ATPase Signaling: From Specific Ligands to General Reactive Oxygen Species. Int J Mol Sci 2018; 19:ijms19092600. [PMID: 30200500 PMCID: PMC6163532 DOI: 10.3390/ijms19092600] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 08/10/2018] [Accepted: 08/28/2018] [Indexed: 12/16/2022] Open
Abstract
The signaling function of the Na/K-ATPase has been established for 20 years and is widely accepted in the field, with many excellent reports and reviews not cited here. Even though there is debate about the underlying mechanism, the signaling function is unquestioned. This short review looks back at the evolution of Na/K-ATPase signaling, from stimulation by cardiotonic steroids (also known as digitalis-like substances) as specific ligands to stimulation by reactive oxygen species (ROS) in general. The interplay of cardiotonic steroids and ROS in Na/K-ATPase signaling forms a positive-feedback oxidant amplification loop that has been implicated in some pathophysiological conditions.
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The Role of Na/K-ATPase Signaling in Oxidative Stress Related to Aging: Implications in Obesity and Cardiovascular Disease. Int J Mol Sci 2018; 19:ijms19072139. [PMID: 30041449 PMCID: PMC6073138 DOI: 10.3390/ijms19072139] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 07/19/2018] [Accepted: 07/21/2018] [Indexed: 12/12/2022] Open
Abstract
Aging has been associated with a series of pathophysiological processes causing general decline in the overall health of the afflicted population. The cumulative line of evidence suggests an important role of oxidative stress in the development and progression of the aging process and metabolic abnormalities, exacerbating adipocyte dysfunction, cardiovascular diseases, and associated complications at the same time. In recent years, robust have established the implication of Na/K-ATPase signaling in causing oxidative stress and alterations in cellular mechanisms, in addition to its distinct pumping function. Understanding the underlying molecular mechanisms and exploring the possible sources of pro-oxidants may allow for developing therapeutic targets in these processes and formulate novel intervention strategies for patients susceptible to aging and associated complications, such as obesity and cardiovascular disease. The attenuation of oxidative stress with targeted treatment options can improve patient outcomes and significantly reduce economic burden.
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Buzaglo N, Golomb M, Rosen H, Beeri R, Ami HCB, Langane F, Pierre S, Lichtstein D. Augmentation of Ouabain-Induced Increase in Heart Muscle Contractility by Akt Inhibitor MK-2206. J Cardiovasc Pharmacol Ther 2018; 24:78-89. [DOI: 10.1177/1074248418788301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cardiac steroids (CSs), such as ouabain and digoxin, increase the force of contraction of heart muscle and are used for the treatment of congestive heart failure (CHF). However, their small therapeutic window limits their use. It is well established that Na+, K+-ATPase inhibition mediates CS-induced increase in heart contractility. Recently, the involvement of intracellular signal transduction was implicated in this effect. The aim of the present study was to test the hypothesis that combined treatment with ouabain and Akt inhibitor (MK-2206) augments ouabain-induced inotropy in mammalian models. We demonstrate that the combined treatment led to an ouabain-induced increase in contractility at concentrations at which ouabain alone was ineffective. This was shown in 3 experimental systems: neonatal primary rat cardiomyocytes, a Langendorff preparation, and an in vivo myocardial infarction induced by left anterior descending coronary artery (LAD) ligation. Furthermore, cell viability experiments revealed that this treatment protected primary cardiomyocytes from MK-2206 toxicity and in vivo reduced the size of scar tissue 10 days post-LAD ligation. We propose that Akt activity imposes a constant inhibitory force on muscle contraction, which is attenuated by low concentrations of MK-2206, resulting in potentiation of the ouabain effect. This demonstration of the increase in the CS effect advocates the development of the combined treatment in CHF.
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Affiliation(s)
- Nahum Buzaglo
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, The Hebrew University Hadassah Medical School, Jerusalem, Israel
| | - Mordechai Golomb
- The Heart Institute, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Haim Rosen
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University Hadassah Medical School, Jerusalem, Israel
| | - Ronen Beeri
- The Heart Institute, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Hagit Cohen-Ben Ami
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, The Hebrew University Hadassah Medical School, Jerusalem, Israel
| | - Fattal Langane
- Marshall Institute for Interdisciplinary Research, Huntington, WV, USA
| | - Sandrine Pierre
- Marshall Institute for Interdisciplinary Research, Huntington, WV, USA
| | - David Lichtstein
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, The Hebrew University Hadassah Medical School, Jerusalem, Israel
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Yan X, Xun M, Wu L, Du X, Zhang F, Zheng J. DRm217 attenuates myocardial ischemia-reperfusion injury via stabilizing plasma membrane Na + -K + -ATPase, inhibiting Na + -K + -ATPase/ROS pathway and activating PI3K/Akt and ERK1/2. Toxicol Appl Pharmacol 2018; 349:62-71. [DOI: 10.1016/j.taap.2018.04.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 11/17/2022]
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36
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Cheng X, Song Y, Wang Y. pNaKtide ameliorates renal interstitial fibrosis through inhibition of sodium-potassium adenosine triphosphatase-mediated signaling pathways in unilateral ureteral obstruction mice. Nephrol Dial Transplant 2018; 34:242-252. [DOI: 10.1093/ndt/gfy107] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/17/2018] [Indexed: 01/02/2023] Open
Affiliation(s)
- Xi Cheng
- Renal Division, Department of Medicine, Peking University First Hospital
- Institute of Nephrology, Peking University
- Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education
| | - Yi Song
- Department of Urology, Peking University First Hospital, Beijing, China
| | - Yu Wang
- Renal Division, Department of Medicine, Peking University First Hospital
- Institute of Nephrology, Peking University
- Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education
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37
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Xiao J, Zhang X, Fu C, Yang Q, Xie Y, Zhang Z, Ye Z. Impaired Na +-K +-ATPase signaling in renal proximal tubule contributes to hyperuricemia-induced renal tubular injury. Exp Mol Med 2018; 50:e452. [PMID: 29497172 PMCID: PMC5898891 DOI: 10.1038/emm.2017.287] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 09/11/2017] [Accepted: 09/26/2017] [Indexed: 12/27/2022] Open
Abstract
Hyperuricemia contributes to renal inflammation. We aimed to investigate the role of Na+–K+–ATPase (NKA) in hyperuricemia-induced renal tubular injury. Human primary proximal tubular epithelial cells (PTECs) were incubated with uric acid (UA) at increasing doses or for increasing lengths of time. PTECs were then stimulated by pre-incubation with an NKA α1 expression vector or small interfering RNA before UA (100 μg ml−1, 48 h) stimulation. Hyperuricemic rats were induced by gastric oxonic acid and treated with febuxostat (Feb). ATP levels, the activity of NKA and expression of its α1 subunit, Src, NOD-like receptor pyrin domain-containing protein 3 (NLRP3) and interleukin 1β (IL-1β) were measured both in vitro and in vivo. Beginning at concentrations of 100 μg ml−1, UA started to dose-dependently reduce NKA activity. UA at a concentration of 100 μg ml−1 time-dependently affected the NKA activity, with the maximal increased NKA activity at 24 h, but the activity started to decrease after 48 h. This inhibitory effect of UA on NKA activity at 48 h was in addition to a decrease in NKA α1 expression in the cell membrane, but an increase in lysosomes. This process also involved the subsequent activation of Src kinase and NLRP3, promoting IL-1β processing. In hyperuricemic rats, renal cortex NKA activity and its α1 expression were upregulated at the 7th week and both decreased at the 10th week, accompanied with increased renal cortex expression of Src, NLRP3 and IL-1β. The UA levels were reduced and renal tubular injuries in hyperuricemic rats were alleviated in the Feb group. Our data suggested that the impairment of NKA and its consequent regulation of Src, NLRP3 and IL-1β in the renal proximal tubule contributed to hyperuricemia-induced renal tubular injury.
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Affiliation(s)
- Jing Xiao
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Xiaoli Zhang
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Chensheng Fu
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Qingmei Yang
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Ying Xie
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Zhenxing Zhang
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
| | - Zhibin Ye
- Department of Nephrology, Huadong Hospital affiliated with Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong hospital affiliated with Fudan University, Shanghai, China
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38
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Lakhani HV, Sharma D, Dodrill MW, Nawab A, Sharma N, Cottrill CL, Shapiro JI, Sodhi K. Phenotypic Alteration of Hepatocytes in Non-Alcoholic Fatty Liver Disease. Int J Med Sci 2018; 15:1591-1599. [PMID: 30588181 PMCID: PMC6299410 DOI: 10.7150/ijms.27953] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/31/2018] [Indexed: 02/06/2023] Open
Abstract
Non-Alcoholic Fatty Liver Disease (NAFLD) has been recognized as the most common liver disorder in developed countries. NAFLD progresses from fat accumulation in hepatocytes to steatohepatitis to further stages of fibrosis and cirrhosis. Simple steatosis, i.e. fat deposition in the liver, is considered benign and gives way to non-alcoholic steatohepatitis (NASH) with a higher probability of progressing to cirrhosis, and liver-related mortality. Evidence has been found that this progression has been associated with marked alterations in hepatocyte histology and a shift in marker expression of healthy hepatocytes including increased expression of peroxisome proliferator-activated receptor gamma (PPARγ), adipocyte protein (aP2), CD36, interleukin-6 (IL-6), interleukin-18 (IL-18) and adiponectin. This progression shares much in common with the obesity phenotype, which involves a transformation of adipocytes from small, healthy cells to large, dysfunctional ones that contribute to redox imbalance and the progression of metabolic syndrome. Further, activation of Src/ERK signaling via the sodium potassium adenosine triphosphatase (Na/K-ATPase) α-1 subunit in impaired hepatocytes may contribute to redox imbalance, exacerbating the progression of NAFLD. This review hypothesizes that an adipogenic transformation of hepatocytes propagates redox imbalance and that the processes occurring in adipogenesis become activated in fat-laden hepatocytes in liver, thereby driving progression to NAFLD. Further, this review discusses therapeutic interventions to reverse NAFLD including the thiazolidinediones (TZDs) and a variety of antioxidant species. The peptide, pNaKtide, which is an antagonist of Na/K-ATPase signaling, is also proposed as a potential pharmacologic option for reducing reactive oxygen species (ROS) and reversing NAFLD by inhibiting the Na/K-ATPase-modulated ROS amplification loop.
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Affiliation(s)
- Hari Vishal Lakhani
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Dana Sharma
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Michael W Dodrill
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Athar Nawab
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Nitin Sharma
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Cameron Lee Cottrill
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Joseph I Shapiro
- Department of Internal Medicine, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
| | - Komal Sodhi
- Department of Surgery, Marshall University Joan C Edwards School of Medicine, Huntington, WV, USA
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Cui X, Xie Z. Protein Interaction and Na/K-ATPase-Mediated Signal Transduction. Molecules 2017; 22:molecules22060990. [PMID: 28613263 PMCID: PMC6152704 DOI: 10.3390/molecules22060990] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/01/2017] [Accepted: 06/02/2017] [Indexed: 02/05/2023] Open
Abstract
The Na/K-ATPase (NKA), or Na pump, is a member of the P-type ATPase superfamily. In addition to pumping ions across cell membrane, it is engaged in assembly of multiple protein complexes in the plasma membrane. This assembly allows NKA to perform many non-pumping functions including signal transduction that are important for animal physiology and disease progression. This article will focus on the role of protein interaction in NKA-mediated signal transduction, and its potential utility as target for developing new therapeutics.
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Affiliation(s)
- Xiaoyu Cui
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA.
| | - Zijian Xie
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV 25703, USA.
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40
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Yan X, Xun M, Dou X, Wu L, Han Y, Zheng J. Regulation of Na +-K +-ATPase effected high glucose-induced myocardial cell injury through c-Src dependent NADPH oxidase/ROS pathway. Exp Cell Res 2017; 357:243-251. [PMID: 28551376 DOI: 10.1016/j.yexcr.2017.05.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 05/15/2017] [Accepted: 05/23/2017] [Indexed: 01/25/2023]
Abstract
Depressed Na+/K+-ATPase activity has long been reported to be involved in diabetic-related cardiomyocyte death and cardiac dysfunction. However, the nature of directly regulating Na+-K+-ATPase in diabetic-related myocardial diseases remains unknown. Hyperglycemia is believed as one of major factors responsible for diabetic-related myocardial apoptosis and dysfunction. In this study, whether inhibiting Na+-K+-ATPase by ouabain or activating Na+-K+-ATPase by DRm217 has functions on high glucose (HG) -induced myocardial injury was investigated. Here we found that addition of DRm217 or ouabain to HG-treated cells had opposite effects. DRm217 decreased but ouabain increased HG-induced cell injury and apoptosis. This was mediated by changing Na+-K+-ATPase activity and Na+-K+-ATPase cell surface expression. The inhibition of Na+-K+-ATPase endocytosis alleviated HG-induced ROS accumulation. Na+-K+-ATPase·c-Src dependent NADPH oxidase/ROS pathway was also involved in the effects of ouabain and DRm217 on HG-induced cell injury. These novel results may help us to understand the important role of the Na+-K+-ATPase in diabetic cardiovascular diseases.
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Affiliation(s)
- Xiaofei Yan
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Meng Xun
- Department of Immunology and Microbiology, Health Science center, Xi'an Jiaotong University, Xi'an 710061, China
| | - Xiaojuan Dou
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Litao Wu
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Yan Han
- Department of Biochemistry and Molecular Biology, Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Jin Zheng
- Hospital of Nephrology, First Affiliated Hospital of Medical College of Xi'an Jiaotong University, Xi'an 710061, China.
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On the Many Actions of Ouabain: Pro-Cystogenic Effects in Autosomal Dominant Polycystic Kidney Disease. Molecules 2017; 22:molecules22050729. [PMID: 28467389 PMCID: PMC5688955 DOI: 10.3390/molecules22050729] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/19/2017] [Accepted: 04/30/2017] [Indexed: 02/07/2023] Open
Abstract
Ouabain and other cardenolides are steroidal compounds originally discovered in plants. Cardenolides were first used as poisons, but after finding their beneficial cardiotonic effects, they were rapidly included in the medical pharmacopeia. The use of cardenolides to treat congestive heart failure remained empirical for centuries and only relatively recently, their mechanisms of action became better understood. A breakthrough came with the discovery that ouabain and other cardenolides exist as endogenous compounds that circulate in the bloodstream of mammals. This elevated these compounds to the category of hormones and opened new lines of investigation directed to further study their biological role. Another important discovery was the finding that the effect of ouabain was mediated not only by inhibition of the activity of the Na,K-ATPase (NKA), but by the unexpected role of NKA as a receptor and a signal transducer, which activates a complex cascade of intracellular second messengers in the cell. This broadened the interest for ouabain and showed that it exerts actions that go beyond its cardiotonic effect. It is now clear that ouabain regulates multiple cell functions, including cell proliferation and hypertrophy, apoptosis, cell adhesion, cell migration, and cell metabolism in a cell and tissue type specific manner. This review article focuses on the cardenolide ouabain and discusses its various in vitro and in vivo effects, its role as an endogenous compound, its mechanisms of action, and its potential use as a therapeutic agent; placing especial emphasis on our findings of ouabain as a pro-cystogenic agent in autosomal dominant polycystic kidney disease (ADPKD).
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Wang X, Liu J, Drummond CA, Shapiro JI. Sodium potassium adenosine triphosphatase (Na/K-ATPase) as a therapeutic target for uremic cardiomyopathy. Expert Opin Ther Targets 2017; 21:531-541. [PMID: 28338377 PMCID: PMC5590225 DOI: 10.1080/14728222.2017.1311864] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/23/2017] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Clinically, patients with significant reductions in renal function present with cardiovascular dysfunction typically termed, uremic cardiomyopathy. It is a progressive series of cardiac pathophysiological changes, including left ventricular diastolic dysfunction and hypertrophy (LVH) which sometimes progress to left ventricular dilation (LVD) and systolic dysfunction in the setting of chronic kidney disease (CKD). Uremic cardiomyopathy is almost ubiquitous in patients afflicted with end stage renal disease (ESRD). Areas covered: This article reviews recent epidemiology, pathophysiology of uremic cardiomyopathy and provide a board overview of Na/K-ATPase research with detailed discussion on the mechanisms of Na/K-ATPase/Src/ROS amplification loop. We also present clinical and preclinical evidences as well as molecular mechanism of this amplification loop in the development of uremic cardiomyopathy. A potential therapeutic peptide that targets on this loop is discussed. Expert opinion: Current clinical treatment for uremic cardiomyopathy remains disappointing. Targeting the ROS amplification loop mediated by the Na/K-ATPase signaling function may provide a novel therapeutic target for uremic cardiomyopathy and related diseases. Additional studies of Na/K-ATPase and other strategies that regulate this loop will lead to new therapeutics.
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Affiliation(s)
- Xiaoliang Wang
- a Joan C Edwards School of Medicine at Marshall University , Huntington , WV , United States
- b University of Toledo College of Medicine and Life Sciences , Toledo , OH , United States
| | - Jiang Liu
- a Joan C Edwards School of Medicine at Marshall University , Huntington , WV , United States
| | - Christopher A Drummond
- b University of Toledo College of Medicine and Life Sciences , Toledo , OH , United States
| | - Joseph I Shapiro
- a Joan C Edwards School of Medicine at Marshall University , Huntington , WV , United States
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Chen L, Li J, Ke X, Qu W, Zhang J, Feng F, Liu W. The therapeutic effects of Periploca forrestii Schltr. Stem extracts on collagen-induced arthritis by inhibiting the activation of Src/NF-κB signaling pathway in rats. JOURNAL OF ETHNOPHARMACOLOGY 2017; 202:12-19. [PMID: 28286042 DOI: 10.1016/j.jep.2017.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/06/2017] [Accepted: 03/06/2017] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Periploca forrestii Schltr. is a classical traditional Chinese medicine (TCM) called Heilonggu (HLG) in China. According to the theory of TCM, it possesses the efficacy of eliminating wind and removing dampness. In clinical practice, it is commonly used for the treatment of rheumatoid arthritis. The present work aimed to evaluate the anti-rheumatism activity of HLG ethanol extract and reveal the underlying molecular mechanism by employing an animal model of collagen-induced rheumatoid arthritis (CIA) in rats. MATERIALS AND METHODS The CIA was induced in male Sprague-Dawley rats by intradermal injection of bovine collagen-II in complete Freund's adjuvant (CFA) at the base of tail. The rats received oral administration of HLG (200 and 400mg/kg) from day 1, with the treatment lasting for 28 days. A variety of indicators were measured for evaluation of anti-rheumatism effect, including paw swelling, arthritis scores, and histopathological changes. Furthermore, the serum levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and prostaglandin E2 (PGE2), as well as cyclooxygenase-2 (COX-2), nuclear factor NF-κB p65 and Src kinase in joint synovial tissues were detected to explore the possible mechanisms. RESULTS The administration of HLG significantly restored type II collagen-induced arthritis in rats as evidenced by decrease in paw swelling and inflammatory factors in serum. Meanwhile, this treatment also notably reduced NF-κB p65 and COX-2 expression. Surprisingly, the activity of Src kinase was also inhibited demonstrated by downregulation of phosphorylated Src. CONCLUSION Our results revealed that HLG possessed observable therapeutic action on collagen-induced arthritis by inhibiting the activation of Src and nuclear translocation of NF-κB in rats. HLG may serve as a potential candidate for the management of patients with RA.
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Affiliation(s)
- Lei Chen
- Department of Pharmaceutical Analysis, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Jinsong Li
- Department of Pharmaceutical Analysis, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Xuan Ke
- Department of Pharmacology, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009 China
| | - Wei Qu
- Key Laboratory of Biomedical Functional Meterials, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Jie Zhang
- Key Laboratory of Biomedical Functional Meterials, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Feng Feng
- Key Laboratory of Biomedical Functional Meterials, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China.
| | - Wenyuan Liu
- Department of Pharmaceutical Analysis, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China.
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Hangaard L, Bouzinova EV, Staehr C, Dam VS, Kim S, Xie Z, Aalkjaer C, Matchkov VV. Na-K-ATPase regulates intercellular communication in the vascular wall via cSrc kinase-dependent connexin43 phosphorylation. Am J Physiol Cell Physiol 2017; 312:C385-C397. [DOI: 10.1152/ajpcell.00347.2016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/10/2017] [Accepted: 01/14/2017] [Indexed: 12/23/2022]
Abstract
Communication between vascular smooth muscle cells (VSMCs) is dependent on gap junctions and is regulated by the Na-K-ATPase. The Na-K-ATPase is therefore important for synchronized VSMC oscillatory activity, i.e., vasomotion. The signaling between the Na-K-ATPase and gap junctions is unknown. We tested here the hypothesis that this signaling involves cSrc kinase. Intercellular communication was assessed by membrane capacitance measurements of electrically coupled VSMCs. Vasomotion in isometric myograph, input resistance, and synchronized [Ca2+]i transients were used as readout for intercellular coupling in rat mesenteric small arteries in vitro. Phosphorylation of cSrc kinase and connexin43 (Cx43) were semiquantified by Western blotting. Micromole concentration of ouabain reduced the amplitude of norepinephrine-induced vasomotion and desynchronized Ca2+ transients in VSMC in the arterial wall. Ouabain also increased input resistance in the arterial wall. These effects of ouabain were antagonized by inhibition of tyrosine phosphorylation with genistein, PP2, and by an inhibitor of the Na-K-ATPase-dependent cSrc activation, pNaKtide. Moreover, inhibition of cSrc phosphorylation increased vasomotion amplitude and decreased the resistance between cells in the vascular wall. Ouabain inhibited the electrical coupling between A7r5 cells, but pNaKtide restored the electrical coupling. Ouabain increased cSrc autophosphorylation of tyrosine 418 (Y418) required for full catalytic activity whereas pNaKtide antagonized it. This cSrc activation was associated with Cx43 phosphorylation of tyrosine 265 (Y265). Our findings demonstrate that Na-K-ATPase regulates intercellular communication in the vascular wall via cSrc-dependent Cx43 tyrosine phosphorylation.
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Affiliation(s)
- Lise Hangaard
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | | | - Vibeke S. Dam
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Sukhan Kim
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Zijian Xie
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, West Virginia
| | - Christian Aalkjaer
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Biomedicine, University of Copenhagen, Copenhagen, Denmark; and
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Yan X, Xun M, Dou X, Wu L, Zhang F, Zheng J. Activation of Na+-K+-ATPase with DRm217 attenuates oxidative stress-induced myocardial cell injury via closing Na+-K+-ATPase/Src/Ros amplifier. Apoptosis 2017; 22:531-543. [DOI: 10.1007/s10495-016-1342-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Yan Y, Shapiro AP, Mopidevi BR, Chaudhry MA, Maxwell K, Haller ST, Drummond CA, Kennedy DJ, Tian J, Malhotra D, Xie ZJ, Shapiro JI, Liu J. Protein Carbonylation of an Amino Acid Residue of the Na/K-ATPase α1 Subunit Determines Na/K-ATPase Signaling and Sodium Transport in Renal Proximal Tubular Cells. J Am Heart Assoc 2016; 5:e003675. [PMID: 27613772 PMCID: PMC5079028 DOI: 10.1161/jaha.116.003675] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 08/12/2016] [Indexed: 01/12/2023]
Abstract
BACKGROUND We have demonstrated that cardiotonic steroids, such as ouabain, signaling through the Na/K-ATPase, regulate sodium reabsorption in the renal proximal tubule. By direct carbonylation modification of the Pro222 residue in the actuator (A) domain of pig Na/K-ATPase α1 subunit, reactive oxygen species are required for ouabain-stimulated Na/K-ATPase/c-Src signaling and subsequent regulation of active transepithelial (22)Na(+) transport. In the present study we sought to determine the functional role of Pro222 carbonylation in Na/K-ATPase signaling and sodium handling. METHODS AND RESULTS Stable pig α1 knockdown LLC-PK1-originated PY-17 cells were rescued by expressing wild-type rat α1 and rat α1 with a single mutation of Pro224 (corresponding to pig Pro222) to Ala. This mutation does not affect ouabain-induced inhibition of Na/K-ATPase activity, but abolishes the effects of ouabain on Na/K-ATPase/c-Src signaling, protein carbonylation, Na/K-ATPase endocytosis, and active transepithelial (22)Na(+) transport. CONCLUSIONS Direct carbonylation modification of Pro224 in the rat α1 subunit determines ouabain-mediated Na/K-ATPase signal transduction and subsequent regulation of renal proximal tubule sodium transport.
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Affiliation(s)
- Yanling Yan
- Department of Pharmacology, Physiology and Toxicology, JCE School of Medicine, Marshall University, Huntington, WV
| | - Anna P Shapiro
- Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | - Brahma R Mopidevi
- Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | - Muhammad A Chaudhry
- Department of Pharmacology, Physiology and Toxicology, JCE School of Medicine, Marshall University, Huntington, WV
| | - Kyle Maxwell
- Department of Pharmacology, Physiology and Toxicology, JCE School of Medicine, Marshall University, Huntington, WV
| | - Steven T Haller
- Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | | | - David J Kennedy
- Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | - Jiang Tian
- Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | - Deepak Malhotra
- Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | - Zi-Jian Xie
- Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV
| | - Joseph I Shapiro
- Department of Pharmacology, Physiology and Toxicology, JCE School of Medicine, Marshall University, Huntington, WV Department of Medicine, University of Toledo College of Medicine, Toledo, OH
| | - Jiang Liu
- Department of Pharmacology, Physiology and Toxicology, JCE School of Medicine, Marshall University, Huntington, WV Marshall Institute for Interdisciplinary Research, Marshall University, Huntington, WV
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Shah PT, Martin R, Yan Y, Shapiro JI, Liu J. Carbonylation Modification Regulates Na/K-ATPase Signaling and Salt Sensitivity: A Review and a Hypothesis. Front Physiol 2016; 7:256. [PMID: 27445847 PMCID: PMC4923243 DOI: 10.3389/fphys.2016.00256] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 06/11/2016] [Indexed: 01/01/2023] Open
Abstract
Na/K-ATPase signaling has been implicated in different physiological and pathophysiological conditions. Accumulating evidence indicates that oxidative stress not only regulates the Na/K-ATPase enzymatic activity, but also regulates its signaling and other functions. While cardiotonic steroids (CTS)-induced increase in reactive oxygen species (ROS) generation is an intermediate step in CTS-mediated Na/K-ATPase signaling, increase in ROS alone also stimulates Na/K-ATPase signaling. Based on literature and our observations, we hypothesize that ROS have biphasic effects on Na/K-ATPase signaling, transcellular sodium transport, and urinary sodium excretion. Oxidative modulation, in particular site specific carbonylation of the Na/K-ATPase α1 subunit, is a critical step in proximal tubular Na/K-ATPase signaling and decreased transcellular sodium transport leading to increases in urinary sodium excretion. However, once this system is overstimulated, the signaling, and associated changes in sodium excretion are blunted. This review aims to evaluate ROS-mediated carbonylation of the Na/K-ATPase, and its potential role in the regulation of pump signaling and sodium reabsorption in the renal proximal tubule (RPT).
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Affiliation(s)
- Preeya T Shah
- Department of Pharmacology, Physiology and Toxicology, Joan C. Edwards School of Medicine, Marshall University Huntington, WV, USA
| | - Rebecca Martin
- Department of Pharmacology, Physiology and Toxicology, Joan C. Edwards School of Medicine, Marshall University Huntington, WV, USA
| | - Yanling Yan
- Department of Pharmacology, Physiology and Toxicology, Joan C. Edwards School of Medicine, Marshall University Huntington, WV, USA
| | - Joseph I Shapiro
- Department of Pharmacology, Physiology and Toxicology, Joan C. Edwards School of Medicine, Marshall University Huntington, WV, USA
| | - Jiang Liu
- Department of Pharmacology, Physiology and Toxicology, Joan C. Edwards School of Medicine, Marshall University Huntington, WV, USA
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Matchkov VV, Krivoi II. Specialized Functional Diversity and Interactions of the Na,K-ATPase. Front Physiol 2016; 7:179. [PMID: 27252653 PMCID: PMC4879863 DOI: 10.3389/fphys.2016.00179] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 05/04/2016] [Indexed: 12/22/2022] Open
Abstract
Na,K-ATPase is a protein ubiquitously expressed in the plasma membrane of all animal cells and vitally essential for their functions. A specialized functional diversity of the Na,K-ATPase isozymes is provided by molecular heterogeneity, distinct subcellular localizations, and functional interactions with molecular environment. Studies over the last decades clearly demonstrated complex and isoform-specific reciprocal functional interactions between the Na,K-ATPase and neighboring proteins and lipids. These interactions are enabled by a spatially restricted ion homeostasis, direct protein-protein/lipid interactions, and protein kinase signaling pathways. In addition to its "classical" function in ion translocation, the Na,K-ATPase is now considered as one of the most important signaling molecules in neuronal, epithelial, skeletal, cardiac and vascular tissues. Accordingly, the Na,K-ATPase forms specialized sub-cellular multimolecular microdomains which act as receptors to circulating endogenous cardiotonic steroids (CTS) triggering a number of signaling pathways. Changes in these endogenous cardiotonic steroid levels and initiated signaling responses have significant adaptive values for tissues and whole organisms under numerous physiological and pathophysiological conditions. This review discusses recent progress in the studies of functional interactions between the Na,K-ATPase and molecular microenvironment, the Na,K-ATPase-dependent signaling pathways and their significance for diversity of cell function.
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Affiliation(s)
| | - Igor I Krivoi
- Department of General Physiology, St. Petersburg State University St. Petersburg, Russia
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Buzaglo N, Rosen H, Ben Ami HC, Inbal A, Lichtstein D. Essential Opposite Roles of ERK and Akt Signaling in Cardiac Steroid-Induced Increase in Heart Contractility. ACTA ACUST UNITED AC 2016; 357:345-56. [DOI: 10.1124/jpet.115.230763] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 02/16/2016] [Indexed: 02/04/2023]
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Sodhi K, Maxwell K, Yan Y, Liu J, Chaudhry MA, Getty M, Xie Z, Abraham NG, Shapiro JI. RETRACTED: pNaKtide inhibits Na/K-ATPase reactive oxygen species amplification and attenuates adipogenesis. SCIENCE ADVANCES 2015; 1:e1500781. [PMID: 26601314 PMCID: PMC4646828 DOI: 10.1126/sciadv.1500781] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/03/2015] [Indexed: 06/05/2023]
Abstract
Obesity has become a worldwide epidemic and is a major risk factor for metabolic syndrome. Oxidative stress is known to play a role in the generation and maintenance of an obesity phenotype in both isolated adipocytes and intact animals. Because we had identified that the Na/K-ATPase can amplify oxidant signaling, we speculated that a peptide designed to inhibit this pathway, pNaKtide, might ameliorate an obesity phenotype. To test this hypothesis, we first performed studies in isolated murine preadipocytes (3T3L1 cells) and found that pNaKtide attenuated oxidant stress and lipid accumulation in a dose-dependent manner. Complementary experiments in C57Bl6 mice fed a high-fat diet corroborated our in vitro observations. Administration of pNaKtide in these mice reduced body weight gain, restored systemic redox and inflammatory milieu, and, crucially, improved insulin sensitivity. Thus, we propose that inhibition of Na/K-ATPase amplification of oxidative stress may ultimately be a novel way to combat obesity, insulin resistance, and metabolic syndrome.
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Affiliation(s)
- Komal Sodhi
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Kyle Maxwell
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Yanling Yan
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Jiang Liu
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Muhammad A. Chaudhry
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Morghan Getty
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Zijian Xie
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
| | - Nader G. Abraham
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
- Department of Medicine, New York Medical College, Valhalla, NY 10595, USA
| | - Joseph I. Shapiro
- Departments of Medicine, Pharmacology, and Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25701, USA
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