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Zhang K, Yuan Z, Wang S, Zhao S, Cui H, Lai Y. The abnormalities of free fatty acid metabolism in patients with hypertrophic cardiomyopathy, a single-center retrospective observational study. BMC Cardiovasc Disord 2024; 24:312. [PMID: 38902636 PMCID: PMC11188237 DOI: 10.1186/s12872-024-03925-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 05/06/2024] [Indexed: 06/22/2024] Open
Abstract
BACKGROUND Previous studies have shown the importance of energy deficiency and malfunctioning mitochondria in the pathophysiology of hypertrophic cardiomyopathy (HCM). There has been a little research into the relationship between plasma free fatty acids (FFA), one of the heart's main energy sources, and HCM. We evaluated its clinical importance in HCM to see if there was a link between plasma FFA metabolism and HCM. METHODS In a single-center retrospective observational study, we investigated 420 HCM patients diagnosed at Beijing Anzhen Hospital between January 1, 2018, and December 31, 2022. Meanwhile, 1372 individuals without HCM (non-HCM) were recruited. 391 non-HCM patients were chosen as controls via a propensity score matching (PSM) study with a 1:1 ratio. RESULTS FFA in HCM patients showed statistically significant correlations with creatinine (r = 0.115, p = 0.023), estimated GFR (r=-0.130, p = 0.010), BNP (r = 0.152, p = 0.007), LVEF (r=-0.227, p < 0.001), LVFS (r=-0.160, p = 0.002), and LAD (r = 0.112, p = 0.028). Higher FFA levels were found in HCM patients who had atrial fibrillation and NYHY functional classes III or IV (p = 0.015 and p = 0.022, respectively). In HCM patients, multiple linear regression analysis revealed that BNP and LVEF had independent relationships with increasing FFA (Standardized = 0.139, p = 0.013 and =-0.196, p < 0.001, respectively). CONCLUSIONS Among HCM patients, the plasma FFA concentration was lower, and those with AF and NYHY functional class III or IV had higher FFA levels, and LVEF and BNP were independently associated with increasing FFA. The findings of the study should help inspire future efforts to better understand how energy deficiency contributes to hypertrophic cardiomyopathy (HCM) development.
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Affiliation(s)
- Ke Zhang
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, No.2 Anzhen Road, Chaoyang District, Chaoyang District, Box: 100011, Beijing, China
- Beijing Anzhen Hospital, The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Ministry of Education, Beijing, 100029, China
| | - Zhongyu Yuan
- Beijing Anzhen Hospital, The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Ministry of Education, Beijing, 100029, China
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Shengwei Wang
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, No.2 Anzhen Road, Chaoyang District, Chaoyang District, Box: 100011, Beijing, China
- Beijing Anzhen Hospital, The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Ministry of Education, Beijing, 100029, China
| | - Shifeng Zhao
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, No.2 Anzhen Road, Chaoyang District, Chaoyang District, Box: 100011, Beijing, China
- Beijing Anzhen Hospital, The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Ministry of Education, Beijing, 100029, China
| | - Hao Cui
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, No.2 Anzhen Road, Chaoyang District, Chaoyang District, Box: 100011, Beijing, China
- Beijing Anzhen Hospital, The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Ministry of Education, Beijing, 100029, China
| | - Yongqiang Lai
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, No.2 Anzhen Road, Chaoyang District, Chaoyang District, Box: 100011, Beijing, China.
- Beijing Anzhen Hospital, The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Ministry of Education, Beijing, 100029, China.
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Khalaf FK, Mohammed CJ, Dube P, Connolly JA, Lad A, Ashraf UM, Breidenbach JD, Su RC, Kleinhenz AL, Malhotra D, Gohara AF, Haller ST, Kennedy DJ. Paraoxonase-1 Regulation of Renal Inflammation and Fibrosis in Chronic Kidney Disease. Antioxidants (Basel) 2022; 11:antiox11050900. [PMID: 35624764 PMCID: PMC9137734 DOI: 10.3390/antiox11050900] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/27/2022] [Accepted: 04/27/2022] [Indexed: 12/04/2022] Open
Abstract
Papraoxonase-1 (PON1) is a hydrolytic lactonase enzyme that is synthesized in the liver and circulates attached to high-density lipoproteins (HDL). Clinical studies have demonstrated an association between diminished PON-1 and the progression of chronic kidney disease (CKD). However, whether decreased PON-1 is mechanistically linked to renal injury is unknown. We tested the hypothesis that the absence of PON-1 is mechanistically linked to the progression of renal inflammation and injury in CKD. Experiments were performed on control Dahl salt-sensitive rats (SSMcwi, hereafter designated SS rats) and Pon1 knock-out rats (designated SS-Pon1em1Mcwi, hereafter designated SS-PON-1 KO rats) generated by injecting a CRISPR targeting the sequence into SSMcwi rat embryos. The resulting mutation is a 7 bp frameshift insertion in exon 4 of the PON-1 gene. First, to examine the renal protective role of PON-1 in settings of CKD, ten-week-old, age-matched male rats were maintained on a high-salt diet (8% NaCl) for up to 5 weeks to initiate the salt-sensitive hypertensive renal disease characteristic of this model. We found that SS-PON-1 KO rats demonstrated several hallmarks of increased renal injury vs. SS rats including increased renal fibrosis, sclerosis, and tubular injury. SS-PON-1 KO also demonstrated increased recruitment of immune cells in the renal interstitium, as well as increased expression of inflammatory genes compared to SS rats (all p < 0.05). SS-PON-1 KO rats also showed a significant (p < 0.05) decline in renal function and increased renal oxidative stress compared to SS rats, despite no differences in blood pressure between the two groups. These findings suggest a new role for PON-1 in regulating renal inflammation and fibrosis in the setting of chronic renal disease independent of blood pressure.
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Affiliation(s)
- Fatimah K. Khalaf
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
- Department of Clinical Pharmacy, University of Alkafeel, Najaf 54001, Iraq
| | - Chrysan J. Mohammed
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Prabhatchandra Dube
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Jacob A. Connolly
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Apurva Lad
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Usman M. Ashraf
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Joshua D. Breidenbach
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Robin C. Su
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Andrew L. Kleinhenz
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Deepak Malhotra
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Amira F. Gohara
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - Steven T. Haller
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
| | - David J. Kennedy
- Department of Medicine, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43606, USA; (F.K.K.); (C.J.M.); (P.D.); (J.A.C.); (A.L.); (U.M.A.); (J.D.B.); (R.C.S.); (A.L.K.); (D.M.); (A.F.G.); (S.T.H.)
- Correspondence: ; Tel.: +1-419-383-6822
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Gokula V, Terrero D, Joe B. Six Decades of History of Hypertension Research at the University of Toledo: Highlighting Pioneering Contributions in Biochemistry, Genetics, and Host-Microbiota Interactions. Curr Hypertens Rep 2022; 24:669-685. [PMID: 36301488 PMCID: PMC9708772 DOI: 10.1007/s11906-022-01226-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2022] [Indexed: 01/31/2023]
Abstract
PURPOSE OF REVIEW The study aims to capture the history and lineage of hypertension researchers from the University of Toledo in Ohio and showcase their collective scientific contributions dating from their initial discoveries of the physiology of adrenal and renal systems and genetics regulating blood pressure (BP) to its more contemporary contributions including microbiota and metabolomic links to BP regulation. RECENT FINDINGS The University of Toledo College of Medicine and Life Sciences (UTCOMLS), previously known as the Medical College of Ohio, has contributed significantly to our understanding of the etiology of hypertension. Two of the scientists, Patrick Mulrow and John Rapp from UTCOMLS, have been recognized with the highest honor, the Excellence in Hypertension award from the American Heart Association for their pioneering work on the physiology and genetics of hypertension, respectively. More recently, Bina Joe has continued their legacy in the basic sciences by uncovering previously unknown novel links between microbiota and metabolites to the etiology of hypertension, work that has been recognized by the American Heart Association with multiple awards. On the clinical research front, Christopher Cooper and colleagues lead the CORAL trials and contributed importantly to the investigations on renal artery stenosis treatment paradigms. Hypertension research at this institution has not only provided these pioneering insights, but also grown careers of scientists as leaders in academia as University Presidents and Deans of Medical Schools. Through the last decade, the university has expanded its commitment to Hypertension research as evident through the development of the Center for Hypertension and Precision Medicine led by Bina Joe as its founding Director. Hypertension being the top risk factor for cardiovascular diseases, which is the leading cause of human mortality, is an important area of research in multiple international universities. The UTCOMLS is one such university which, for the last 6 decades, has made significant contributions to our current understanding of hypertension. This review is a synthesis of this rich history. Additionally, it also serves as a collection of audio archives by more recent faculty who are also prominent leaders in the field of hypertension research, including John Rapp, Bina Joe, and Christopher Cooper, which are cataloged at Interviews .
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Affiliation(s)
- Veda Gokula
- grid.267337.40000 0001 2184 944XCenter for Hypertension and Precision Medicine, Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo College of Medicine and Life Sciences, Block Health Science Building, 3000 Arlington Ave, Toledo, OH 43614-2598 USA
| | - David Terrero
- grid.267337.40000 0001 2184 944XDepartment of Pharmacology and Experimental Therapeutics, College of Pharmacy, University of Toledo, Toledo, OH USA
| | - Bina Joe
- grid.267337.40000 0001 2184 944XCenter for Hypertension and Precision Medicine, Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo College of Medicine and Life Sciences, Block Health Science Building, 3000 Arlington Ave, Toledo, OH 43614-2598 USA
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Li L, Mi Y, Xu M, Ruan L, Sun J, Song Q. Influence of Dietary Salt Intake on T2D Treatment. Front Endocrinol (Lausanne) 2022; 13:926143. [PMID: 35784580 PMCID: PMC9240780 DOI: 10.3389/fendo.2022.926143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 05/13/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUNDS To what extent patients undergoing long-term T2D treatment are affected by dietary salt intake has not been completely investigated. OBJECTIVES We aimed to investigate the influence of dietary salt intakes on T2D treatment, including glucose-lowering effect and indices related to T2D progression. METHODS The study recruited 1090 patients with T2D at Ningbo City First Hospital from January 1, 2018, to December 30, 2021. We compared their one-year follow-up outcomes in terms of fasting blood glucose (FBG), glycated hemoglobin (HbA1c), blood pressure, obesity, and prevalence of retinopathy and neuropathy among groups with different dietary salt intakes. RESULTS The 1090 patients consisted of 287(26.3%) decreasing-, 190(17.4%) increasing-, 175(16.0%) steadily low-, 243(22.3%) steadily medium-, and 195(17.9%) steadily high-dietary salt intake patients. Compared to increasing-, steadily medium-, and steadily high-dietary salt intake patients, decreasing and steadily low salt intake led to lower baseline FBG, HbA1c, systolic blood pressure (SBP), BMI, and visceral fat area (VFA) (all p<0.05), to a larger decrease in FBG, HbA1c, SBP, BMI, and VFA after one-year treatment (all p<0.05), as well as to a slightly lower prevalence of retinopathy and a significantly lower prevalence of neuropathy. The steadily low salt patients had lower urine albumin/creatinine ratio (UAR) both at baseline and after treatment. Notably, the fasting insulin in the steadily low salt group was higher than the remaining groups after treatment (p<0.01). CONCLUSIONS The present study concludes that lowered dietary salt intake benefits T2D treatment in multiple aspects, including main treatment targets such as FBG and HbA1c, and indices reflecting potential complications of T2D, including BMI, VFA, SBP, UAR, retinopathy, and neuropathy. CLINICAL TRIAL REGISTRATION www.ClinicalTrials.gov, identifier: NCT03811470.
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Affiliation(s)
- Li Li
- Endocrinology and Metabolism, Ningbo City First Hospital, Ningbo, China
| | - Yuwei Mi
- Endocrinology and Metabolism, Ningbo City First Hospital, Ningbo, China
| | - Miao Xu
- Endocrinology and Metabolism, Ningbo City First Hospital, Ningbo, China
| | - Liemin Ruan
- Endocrinology and Metabolism, Ningbo City First Hospital, Ningbo, China
- *Correspondence: Jie Sun, ; Liemin Ruan, ; Qifa Song,
| | - Jie Sun
- Endocrinology and Metabolism, Ningbo City First Hospital, Ningbo, China
- *Correspondence: Jie Sun, ; Liemin Ruan, ; Qifa Song,
| | - Qifa Song
- Medical Data Center, Ningbo City First Hospital, Ningbo, China
- *Correspondence: Jie Sun, ; Liemin Ruan, ; Qifa Song,
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Elucidating Potential Profibrotic Mechanisms of Emerging Biomarkers for Early Prognosis of Hepatic Fibrosis. Int J Mol Sci 2020; 21:ijms21134737. [PMID: 32635162 PMCID: PMC7369895 DOI: 10.3390/ijms21134737] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 06/29/2020] [Accepted: 07/01/2020] [Indexed: 02/06/2023] Open
Abstract
Hepatic fibrosis has been associated with a series of pathophysiological processes causing excessive accumulation of extracellular matrix proteins. Several cellular processes and molecular mechanisms have been implicated in the diseased liver that augments fibrogenesis, fibrogenic cytokines and associated liver complications. Liver biopsy remains an essential diagnostic tool for histological evaluation of hepatic fibrosis to establish a prognosis. In addition to being invasive, this methodology presents with several limitations including poor cost-effectiveness, prolonged hospitalizations, and risks of peritoneal bleeding, while the clinical use of this method does not reveal underlying pathogenic mechanisms. Several alternate noninvasive diagnostic strategies have been developed, to determine the extent of hepatic fibrosis, including the use of direct and indirect biomarkers. Immediate diagnosis of hepatic fibrosis by noninvasive means would be more palatable than a biopsy and could assist clinicians in taking early interventions timely, avoiding fatal complications, and improving prognosis. Therefore, we sought to review some common biomarkers of liver fibrosis along with some emerging candidates, including the oxidative stress-mediated biomarkers, epigenetic and genetic markers, exosomes, and miRNAs that needs further evaluation and would have better sensitivity and specificity. We also aim to elucidate the potential role of cardiotonic steroids (CTS) and evaluate the pro-inflammatory and profibrotic effects of CTS in exacerbating hepatic fibrosis. By understanding the underlying pathogenic processes, the efficacy of these biomarkers could allow for early diagnosis and treatment of hepatic fibrosis in chronic liver diseases, once validated.
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Zhang Y, Wei W, Shilova V, Petrashevskaya NN, Zernetkina VI, Grigorova YN, Marshall CA, Fenner RC, Lehrmann E, Wood WH, Becker KG, Lakatta EG, Bagrov AY, Fedorova OV. Monoclonal Antibody to Marinobufagenin Downregulates TGFβ Profibrotic Signaling in Left Ventricle and Kidney and Reduces Tissue Remodeling in Salt-Sensitive Hypertension. J Am Heart Assoc 2019; 8:e012138. [PMID: 31576777 PMCID: PMC6818028 DOI: 10.1161/jaha.119.012138] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background Elevated levels of an endogenous Na/K-ATPase inhibitor marinobufagenin accompany salt-sensitive hypertension and are implicated in cardiac fibrosis. Immunoneutralization of marinobufagenin reduces blood pressure in Dahl salt-sensitive (Dahl-S) rats. The effect of the anti-marinobufagenin monoclonal antibody on blood pressure, left ventricular (LV) and renal remodeling, and gene expression were investigated in hypertensive Dahl-S rats. Methods and Results Dahl-S rats were fed high NaCl (8%, HS; n=14) or low NaCl (0.1%, LS; n=14) diets for 8 weeks. Animals were administered control antibody (LS control antibody, LSC; HS control antibody, HSC; n=7 per group) or anti-marinobufagenin antibody once on week 7 of diet intervention (n=7 per group). Levels of marinobufagenin, LV, and kidney mRNAs and proteins implicated in profibrotic signaling were assessed. Systolic blood pressure was elevated (211±8 versus 133±3 mm Hg, P<0.01), marinobufagenin increased 2-fold in plasma (P<0.05) and 5-fold in urine (P<0.01), LV and kidney weights increased, and levels of LV collagen-1 rose 3.5-fold in HSC versus LSC. Anti-marinobufagenin antibody treatment decreased systolic blood pressure by 24 mm Hg (P<0.01) and reduced organ weights and level of LV collagen-1 (P<0.01) in hypertensive Dahl salt-sensitive rats with anti-marinobufagenin antibody versus HSC. The expression of genes related to transforming growth factor-β-dependent signaling was upregulated in the left ventricles and kidneys in HSC versus LSC groups and became downregulated following administration of anti-marinobufagenin antibody to hypertensive Dahl-S rats. Marinobufagenin also activated transforming growth factor-β signaling in cultured ventricular myocytes from Dahl-S rats. Conclusions Immunoneutralization of heightened marinobufagenin levels in hypertensive Dahl-S rats resulted in a downregulation of genes implicated in transforming growth factor-β pathway, which indicates that marinobufagenin is an activator of profibrotic transforming growth factor-β-dependent signaling in salt-sensitive hypertension.
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Affiliation(s)
- Yongqing Zhang
- Laboratory of Genetics and Genomics National Institute on Aging NIH Baltimore MD
| | - Wen Wei
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | - Victoria Shilova
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | | | | | - Yulia N Grigorova
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | - Courtney A Marshall
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | - Rachel C Fenner
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | - Elin Lehrmann
- Laboratory of Genetics and Genomics National Institute on Aging NIH Baltimore MD
| | - William H Wood
- Laboratory of Genetics and Genomics National Institute on Aging NIH Baltimore MD
| | - Kevin G Becker
- Laboratory of Genetics and Genomics National Institute on Aging NIH Baltimore MD
| | - Edward G Lakatta
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | - Alexei Y Bagrov
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
| | - Olga V Fedorova
- Laboratory of Cardiovascular Science National Institute on Aging NIH Baltimore MD
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Zybailov BL, Glazko GV, Rahmatallah Y, Andreyev DS, McElroy T, Karaduta O, Byrum SD, Orr L, Tackett AJ, Mackintosh SG, Edmondson RD, Kieffer DA, Martin RJ, Adams SH, Vaziri ND, Arthur JM. Metaproteomics reveals potential mechanisms by which dietary resistant starch supplementation attenuates chronic kidney disease progression in rats. PLoS One 2019; 14:e0199274. [PMID: 30699108 PMCID: PMC6353070 DOI: 10.1371/journal.pone.0199274] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 12/12/2018] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Resistant starch is a prebiotic metabolized by the gut bacteria. It has been shown to attenuate chronic kidney disease (CKD) progression in rats. Previous studies employed taxonomic analysis using 16S rRNA sequencing and untargeted metabolomics profiling. Here we expand these studies by metaproteomics, gaining new insight into the host-microbiome interaction. METHODS Differences between cecum contents in CKD rats fed a diet containing resistant starch with those fed a diet containing digestible starch were examined by comparative metaproteomics analysis. Taxonomic information was obtained using unique protein sequences. Our methodology results in quantitative data covering both host and bacterial proteins. RESULTS 5,834 proteins were quantified, with 947 proteins originating from the host organism. Taxonomic information derived from metaproteomics data surpassed previous 16S RNA analysis, and reached species resolutions for moderately abundant taxonomic groups. In particular, the Ruminococcaceae family becomes well resolved-with butyrate producers and amylolytic species such as R. bromii clearly visible and significantly higher while fibrolytic species such as R. flavefaciens are significantly lower with resistant starch feeding. The observed changes in protein patterns are consistent with fiber-associated improvement in CKD phenotype. Several known host CKD-associated proteins and biomarkers of impaired kidney function were significantly reduced with resistant starch supplementation. Data are available via ProteomeXchange with identifier PXD008845. CONCLUSIONS Metaproteomics analysis of cecum contents of CKD rats with and without resistant starch supplementation reveals changes within gut microbiota at unprecedented resolution, providing both functional and taxonomic information. Proteins and organisms differentially abundant with RS supplementation point toward a shift from mucin degraders to butyrate producers.
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Affiliation(s)
- Boris L Zybailov
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Galina V Glazko
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Yasir Rahmatallah
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Dmitri S Andreyev
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Taylor McElroy
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Oleg Karaduta
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Stephanie D Byrum
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Lisa Orr
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Alan J Tackett
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
- Proteomics Core Facility, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Samuel G Mackintosh
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
- Proteomics Core Facility, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Ricky D Edmondson
- Proteomics Core Facility, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Dorothy A Kieffer
- Department of Nutrition, University of California, Davis, CA, United States of America
| | - R J Martin
- Department of Nutrition, University of California, Davis, CA, United States of America
| | - Sean H Adams
- Arkansas Children's Nutrition Center and Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
| | - Nosratola D Vaziri
- Division of Nephrology, University of California, Irvine, CA, United States of America
| | - John M Arthur
- Division of Nephrology, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America
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Khalaf FK, Dube P, Mohamed A, Tian J, Malhotra D, Haller ST, Kennedy DJ. Cardiotonic Steroids and the Sodium Trade Balance: New Insights into Trade-Off Mechanisms Mediated by the Na⁺/K⁺-ATPase. Int J Mol Sci 2018; 19:E2576. [PMID: 30200235 PMCID: PMC6165267 DOI: 10.3390/ijms19092576] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 08/24/2018] [Accepted: 08/26/2018] [Indexed: 02/06/2023] Open
Abstract
In 1972 Neal Bricker presented the "trade-off" hypothesis in which he detailed the role of physiological adaptation processes in mediating some of the pathophysiology associated with declines in renal function. In the late 1990's Xie and Askari published seminal studies indicating that the Na⁺/K⁺-ATPase (NKA) was not only an ion pump, but also a signal transducer that interacts with several signaling partners. Since this discovery, numerous studies from multiple laboratories have shown that the NKA is a central player in mediating some of these long-term "trade-offs" of the physiological adaptation processes which Bricker originally proposed in the 1970's. In fact, NKA ligands such as cardiotonic steroids (CTS), have been shown to signal through NKA, and consequently been implicated in mediating both adaptive and maladaptive responses to volume overload such as fibrosis and oxidative stress. In this review we will emphasize the role the NKA plays in this "trade-off" with respect to CTS signaling and its implication in inflammation and fibrosis in target organs including the heart, kidney, and vasculature. As inflammation and fibrosis exhibit key roles in the pathogenesis of a number of clinical disorders such as chronic kidney disease, heart failure, atherosclerosis, obesity, preeclampsia, and aging, this review will also highlight the role of newly discovered NKA signaling partners in mediating some of these conditions.
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Affiliation(s)
- Fatimah K Khalaf
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
| | - Prabhatchandra Dube
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
| | - Amal Mohamed
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
| | - Jiang Tian
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
| | - Deepak Malhotra
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
| | - Steven T Haller
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
| | - David J Kennedy
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Health Education Building RM 205, 3000 Arlington Ave, Toledo, OH 43614, USA.
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Martin R, Shapiro JI. Role of adipocytes in hypertension. World J Hypertens 2016; 6:66-75. [DOI: 10.5494/wjh.v6.i2.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 06/02/2016] [Indexed: 02/06/2023] Open
Abstract
Although it has known for some time that obesity is associated with salt sensitivity and hypertension, recent data suggests that the adipocyte may actually be the proximate cause of this physiological changes. In the following review, the data demonstrating this association as well as the potentially operative pathophysiological mechanisms are reviewed and discussed.
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Laird JG, Pan Y, Modestou M, Yamaguchi DM, Song H, Sokolov M, Baker SA. Identification of a VxP Targeting Signal in the Flagellar Na+ /K+ -ATPase. Traffic 2015; 16:1239-53. [PMID: 26373354 DOI: 10.1111/tra.12332] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 09/11/2015] [Accepted: 09/11/2015] [Indexed: 12/15/2022]
Abstract
Na(+) /K(+) -ATPase (NKA) participates in setting electrochemical gradients, cardiotonic steroid signaling and cellular adhesion. Distinct isoforms of NKA are found in different tissues and subcellular localization patterns. For example, NKA α1 is widely expressed, NKA α3 is enriched in neurons and NKA α4 is a testes-specific isoform found in sperm flagella. In some tissues, ankyrin, a key component of the membrane cytoskeleton, can regulate the trafficking of NKA. In the retina, NKA and ankyrin-B are expressed in multiple cell types and immunostaining for each is striking in the synaptic layers. Labeling for NKA is also prominent along the inner segment plasma membrane (ISPM) of photoreceptors. NKA co-immunoprecipitates with ankyrin-B, but on a subcellular level colocalization of these two proteins varies dependent on the cell type. We used transgenic Xenopus laevis tadpoles to evaluate the subcellular trafficking of NKA in photoreceptors. GFP-NKA α3 and α1 are localized to the ISPM, but α4 is localized to outer segments (OSs). We identified a VxP motif responsible for the OS targeting by using a series of chimeric and mutant NKA constructs. This motif is similar to previously identified ciliary targeting motifs. Given the structural similarities between OSs and flagella, our findings shed light on the subcellular targeting of this testes-specific NKA isoform.
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Affiliation(s)
- Joseph G Laird
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - Yuan Pan
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.,Current address: Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Modestos Modestou
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - David M Yamaguchi
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - Hongman Song
- Department of Ophthalmology, West Virginia University School of Medicine and West Virginia University Eye Institute, Morgantown, WV, 26506, USA.,Current address: Section for Translational Research in Retina & Macular Degeneration, National Institute on Deafness and Other Communication Disorders, NIH, Bethesda, MD, 20892, USA
| | - Maxim Sokolov
- Department of Ophthalmology, West Virginia University School of Medicine and West Virginia University Eye Institute, Morgantown, WV, 26506, USA
| | - Sheila A Baker
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
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11
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Kennedy DJ, Shrestha K, Sheehey B, Li XS, Guggilam A, Wu Y, Finucan M, Gabi A, Medert CM, Westfall K, Borowski A, Fedorova O, Bagrov AY, Tang WHW. Elevated Plasma Marinobufagenin, An Endogenous Cardiotonic Steroid, Is Associated With Right Ventricular Dysfunction and Nitrative Stress in Heart Failure. Circ Heart Fail 2015; 8:1068-76. [PMID: 26276886 DOI: 10.1161/circheartfailure.114.001976] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 08/05/2015] [Indexed: 01/08/2023]
Abstract
BACKGROUND Plasma levels of cardiotonic steroids are elevated in volume-expanded states, such as chronic kidney disease, but the role of these natriuretic hormones in subjects with heart failure (HF) is unclear. We sought to determine the prognostic role of the cardiotonic steroids marinobufagenin (MBG) in HF, particularly in relation to long-term outcomes. METHODS AND RESULTS We first measured plasma MBG levels and performed comprehensive clinical, laboratory, and echocardiographic assessment in 245 patients with HF. All-cause mortality, cardiac transplantation, and HF hospitalization were tracked for 5 years. In our study cohort, median (interquartile range) MBG was 583 (383-812) pM. Higher MBG was associated with higher myeloperoxidase (r=0.42, P<0.0001), B-type natriuretic peptide (r=0.25, P=0.001), and asymmetrical dimethylarginine (r=0.32, P<0.001). Elevated levels of MBG were associated with measures of worse right ventricular function (RV s', r=-0.39, P<0.0001) and predicted increased risk of adverse clinical outcomes (MBG≥574 pmol/L: hazard ratio 1.58 [1.10-2.31], P=0.014) even after adjustment for age, sex, diabetes mellitus, and ischemic pathogenesis. In mice, a left anterior descending coronary artery ligation model of HF lead to increases in MBG, whereas infusion of MBG into mice for 4 weeks lead to significant increases in myeloperoxidase, asymmetrical dimethylarginine, and cardiac fibrosis. CONCLUSIONS In the setting of HF, elevated plasma levels of MBG are associated with right ventricular dysfunction and predict worse long-term clinical outcomes in multivariable models adjusting for established clinical and biochemical risk factors. Infusion of MBG seems to directly contribute to increased nitrative stress and cardiac fibrosis.
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Affiliation(s)
- David J Kennedy
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Kevin Shrestha
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Brendan Sheehey
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Xinmin S Li
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Anuradha Guggilam
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Yuping Wu
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Michael Finucan
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Alaa Gabi
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Charles M Medert
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Kristen Westfall
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Allen Borowski
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Olga Fedorova
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - Alexei Y Bagrov
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.)
| | - W H Wilson Tang
- From the Department of Cellular and Molecular Medicine (D.J.K., K.S., B.S., X.S.L., A.G., Y.W., M.F., A.G., C.M.M., K.W., A.B., W.H.W.T.), Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute (W.H.W.T.), Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute (D.J.K.), and Department of Cardiovascular Medicine, Heart and Vascular Institute (W.H.W.T.), Cleveland Clinic, Cleveland, OH; and Laboratory of Cardiovascular Science, Hypertension Unit, National Institute on Aging, National Institutes of Health, Baltimore, MD (O.F., A.Y.B.).
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Hamlyn JM, Manunta P. Endogenous cardiotonic steroids in kidney failure: a review and an hypothesis. Adv Chronic Kidney Dis 2015; 22:232-44. [PMID: 25908473 DOI: 10.1053/j.ackd.2014.12.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 12/17/2014] [Accepted: 12/22/2014] [Indexed: 02/06/2023]
Abstract
In response to progressive nephron loss, volume and humoral signals in the circulation have increasing relevance. These signals, including plasma sodium, angiotensin II, and those related to volume status, activate a slow neuromodulatory pathway within the central nervous system (CNS). The slow CNS pathway includes specific receptors for angiotensin II, mineralocorticoids, and endogenous ouabain (EO). Stimulation of the pathway leads to elevated sympathetic nervous system activity (SNA) and increased circulating EO. The sustained elevation of circulating EO (or ouabain) stimulates central and peripheral mechanisms that amplify the impact of SNA on vascular tone. These include changes in synaptic plasticity in the brain and sympathetic ganglia that increase preganglionic tone and amplify ganglionic transmission, amplification of the impact of SNA on arterial tone in the vascular wall, and the reprogramming of calcium signaling proteins in arterial myocytes. These increase SNA, raise basal and evoked arterial tone, and elevate blood pressure (BP). In the setting of CKD, we suggest that sustained activation/elevation of the slow CNS pathway, plasma EO, and the cardiotonic steroid marinobufagenin, comprises a feed-forward system that raises BP and accelerates kidney and cardiac damage. Block of the slow CNS pathway and/or circulating EO and marinobufagenin may reduce BP and slow the progression to ESRD.
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Gonick HC, Buckalew VM. Editorial: Natriuretic Hormones. Front Endocrinol (Lausanne) 2015; 6:108. [PMID: 26236281 PMCID: PMC4503919 DOI: 10.3389/fendo.2015.00108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 06/29/2015] [Indexed: 01/08/2023] Open
Affiliation(s)
- Harvey Craig Gonick
- Division of Nephrology, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Vardaman M. Buckalew
- Section of Nephrology, Department of Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA
- *Correspondence: Vardaman M. Buckalew,
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