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Fuchs MA, Burke EJ, Latic N, Murray S, Li H, Sparks M, Abraham D, Zhang H, Rosenberg P, Hänzelmann S, Hausmann F, Huber T, Erben R, Fisher-Wellman K, Bursac N, Wolf M, Grabner A. Fibroblast Growth Factor (FGF) 23 and FGF Receptor 4 promote cardiac metabolic remodeling in chronic kidney disease. Res Sq 2023:rs.3.rs-3705543. [PMID: 38196615 PMCID: PMC10775858 DOI: 10.21203/rs.3.rs-3705543/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Chronic kidney disease (CKD) is a global health epidemic that significantly increases mortality due to cardiovascular disease. Left ventricular hypertrophy (LVH) is an important mechanism of cardiac injury in CKD. High serum levels of fibroblast growth factor (FGF) 23 in patients with CKD may contribute mechanistically to the pathogenesis of LVH by activating FGF receptor (FGFR) 4 signaling in cardiac myocytes. Mitochondrial dysfunction and cardiac metabolic remodeling are early features of cardiac injury that predate development of hypertrophy, but these mechanisms of disease have been insufficiently studied in models of CKD. Wild-type mice with CKD induced by adenine diet developed LVH that was preceded by morphological changes in mitochondrial structure and evidence of cardiac mitochondrial and metabolic dysfunction. In bioengineered cardio-bundles and neonatal rat ventricular myocytes grown in vitro, FGF23-mediated activation of FGFR4 caused a mitochondrial pathology, characterized by increased bioenergetic stress and increased glycolysis, that preceded the development of cellular hypertrophy. The cardiac metabolic changes and associated mitochondrial alterations in mice with CKD were prevented by global or cardiac-specific deletion of FGFR4. These findings indicate that metabolic remodeling and eventually mitochondrial dysfunction are early cardiac complications of CKD that precede structural remodeling of the heart. Mechanistically, FGF23-mediated activation of FGFR4 causes mitochondrial dysfunction, suggesting that early pharmacologic inhibition of FGFR4 might serve as novel therapeutic intervention to prevent development of LVH and heart failure in patients with CKD.
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Affiliation(s)
- Michaela A. Fuchs
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Emily J. Burke
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Nejla Latic
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
- Department of Biomedical Sciences, University of Veterinary Medicine, Vienna, Austria
| | - Susan Murray
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Hanjun Li
- Department of Biomedical Engineering, Duke University, Durham, USA
| | - Matthew Sparks
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Dennis Abraham
- Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Hengtao Zhang
- Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Paul Rosenberg
- Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Sonja Hänzelmann
- Division of Nephrology, Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Fabian Hausmann
- Division of Nephrology, Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias Huber
- Division of Nephrology, Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Reinhold Erben
- Ludwig Boltzmann Institute of Osteology, Hanusch Hospital, Vienna, Austria
| | - Kelsey Fisher-Wellman
- East Carolina Diabetes and Obesity Institute, Brody School of Medicine, Department of Physiology, East Carolina University, Greenville, North Carolina, USA
- UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - Nenad Bursac
- Department of Biomedical Engineering, Duke University, Durham, USA
- Duke Regeneration Center, Duke University, Durham, North Carolina, USA
| | - Myles Wolf
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
- Duke Clinical Research Institute, Duke University, Durham, North Carolina, USA
| | - Alexander Grabner
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
- Division of Nephrology, Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Duke Regeneration Center, Duke University, Durham, North Carolina, USA
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Fuchs MA, Yuan C, Sato K, Niedzwiecki D, Ye X, Saltz LB, Mayer RJ, Mowat RB, Whittom R, Hantel A, Benson A, Atienza D, Messino M, Kindler H, Venook A, Innocenti F, Warren RS, Bertagnolli MM, Ogino S, Giovannucci EL, Horvath E, Meyerhardt JA, Ng K. Predicted vitamin D status and colon cancer recurrence and mortality in CALGB 89803 (Alliance). Ann Oncol 2018; 28:1359-1367. [PMID: 28327908 DOI: 10.1093/annonc/mdx109] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Background Observational studies suggest that higher levels of 25-hydroxyvitamin D3 (25(OH)D) are associated with a reduced risk of colorectal cancer and improved survival of colorectal cancer patients. However, the influence of vitamin D status on cancer recurrence and survival of patients with stage III colon cancer is unknown. Patients and methods We prospectively examined the influence of post-diagnosis predicted plasma 25(OH)D on outcome among 1016 patients with stage III colon cancer who were enrolled in a National Cancer Institute-sponsored adjuvant therapy trial (CALGB 89803). Predicted 25(OH)D scores were computed using validated regression models. We examined the influence of predicted 25(OH)D scores on cancer recurrence and mortality (disease-free survival; DFS) using Cox proportional hazards. Results Patients in the highest quintile of predicted 25(OH)D score had an adjusted hazard ratio (HR) for colon cancer recurrence or mortality (DFS) of 0.62 (95% confidence interval [CI], 0.44-0.86), compared with those in the lowest quintile (Ptrend = 0.005). Higher predicted 25(OH)D score was also associated with a significant improvement in recurrence-free survival and overall survival (Ptrend = 0.01 and 0.0004, respectively). The benefit associated with higher predicted 25(OH)D score appeared consistent across predictors of cancer outcome and strata of molecular tumor characteristics, including microsatellite instability and KRAS, BRAF, PIK3CA, and TP53 mutation status. Conclusion Higher predicted 25(OH)D levels after a diagnosis of stage III colon cancer may be associated with decreased recurrence and improved survival. Clinical trials assessing the benefit of vitamin D supplementation in the adjuvant setting are warranted. ClinicalTrials.gov Identifier NCT00003835.
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Affiliation(s)
- M A Fuchs
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston
| | - C Yuan
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston
| | - K Sato
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston
| | - D Niedzwiecki
- Alliance Statistics and Data Center, Duke University Medical Center, Durham
| | - X Ye
- Alliance Statistics and Data Center, Duke University Medical Center, Durham
| | - L B Saltz
- Memorial Sloan-Kettering Cancer Center, New York
| | - R J Mayer
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston
| | - R B Mowat
- Toledo Community Hospital Oncology Program, Toledo, USA
| | - R Whittom
- Hôpital du Sacré-Coeur de Montréal, Montreal, Canada
| | - A Hantel
- Edward Cancer Center, Naperville
| | - A Benson
- Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago
| | - D Atienza
- Virginia Oncology Associates, Norfolk
| | - M Messino
- Southeast Cancer Control Consortium, Mission Hospitals-Memorial Campus, Asheville
| | | | - A Venook
- University of California at San Francisco Comprehensive Cancer Center, San Francisco
| | - F Innocenti
- Division of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Chapel Hill
| | - R S Warren
- University of California at San Francisco Comprehensive Cancer Center, San Francisco
| | - M M Bertagnolli
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston.,Department of Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston
| | - S Ogino
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston.,Division of MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston
| | - E L Giovannucci
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston.,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston
| | - E Horvath
- Alliance Protocol Operations Office, Chicago, USA
| | - J A Meyerhardt
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston
| | - K Ng
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston
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Fuchs MA, Zevaco TA, Ember E, Walter O, Held I, Dinjus E, Döring M. Synthesis of cyclic carbonates from epoxides and carbon dioxide catalyzed by an easy-to-handle ionic iron(III) complex. Dalton Trans 2013; 42:5322-9. [PMID: 23403909 DOI: 10.1039/c3dt32961e] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the successful utilization of monometallic, ionic iron(II)- and iron(III)-N2O2-ligand-systems as highly active homogeneous catalysts for the conversion of CO2 with different epoxides to cyclic carbonates. The catalytic tests were performed using propylene oxide (PO) and a range of nine substituted epoxides. Terminal monosubstituted oxides react quantitatively.
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Affiliation(s)
- M A Fuchs
- Institut für Katalyseforschung und -Technologie (IKFT), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Abstract
STUDY OBJECTIVE To determine the frequency with which patients with suspected tuberculosis (TB) or TB risk factors present to US emergency departments and to describe current ED TB infection-control facilities and practices. DESIGN Mailed survey of a sample of EDs in US acute care facilities. PARTICIPANTS A random sample (n = 446) of subjects who responded to a 1992 survey of all US municipal, Veterans Affairs, and university-affiliated hospitals and a 20% random sample of all private hospitals with more than 100 beds conducted by the Centers for Disease Control and Prevention (CDC). RESULTS We collected data on patient demographics and general ED characteristics, TB isolation facilities and policies, and employee tuberculin skin-testing policies and results. Of 446 facilities surveyed, 305 surveys (68.4%) were returned. The proportions of facilities reporting that patients suspected of having TB are seen daily, weekly, monthly, and less frequently were, respectively, 12.6%, 17.2%, 23.3%, and 46.9%. The proportion of EDs in which indigent patients are cared for on a daily basis was 89%; the homeless, 57.5%; the HIV-infected, 35.9%; i.v. drug users, 45.4%; and recent immigrants, 30%. Written criteria for isolation of patients with suspected TB at triage or in the ED were in place in 56% and 76% of facilities, respectively. TB isolation rooms fulfilling CDC guidelines were available in triage or waiting areas in 1.7% of facilities and in 19.6% of EDs. Air venting directly outside, high-efficiency particulate air filtration of recirculated air, and UV germicidal lights were used in 21%, 17%, and 8% of general patient care areas of EDs, respectively. At least one ED employee had shown tuberculin skin test conversion in 16.1% of EDs in 1991; this figure was 26.9% in 1992. CONCLUSION Patients with TB or at risk for TB are often treated in US EDs, and the risk for transmission of TB in this setting appears to be increasing. Prolonged waiting times and lack of infection-control facilities in EDs may contribute to this problem. Consideration should be given to implementation of policies and facilities recommended by the CDC.
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Affiliation(s)
- G J Moran
- Department of Emergency Medicine, Olive View-UCLA Medical Center, Sylmar, USA
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Helmberg A, Tabarelli M, Fuchs MA, Keller E, Dobler G, Schnegg I, Knorr D, Albert E, Kofler R. Identification of molecular defects causing congenital adrenal hyperplasia by cloning and differential hybridization of polymerase chain reaction-amplified 21-hydroxylase (CYP21) genes. DNA Cell Biol 1992; 11:359-68. [PMID: 1605859 DOI: 10.1089/dna.1992.11.359] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Congenital adrenal hyperplasia (CAH), one of the most common autosomal recessive disorders, is caused primarily by defects in the gene encoding steroid 21-hydroxylase, CYP21B. The molecular diagnosis of CAH, important for prenatal diagnosis, carrier detection, and a better understanding of the various clinical CAH forms, is complicated by the close proximity of a highly similar pseudogene, CYP21A, containing (and probably donating, by gene conversion-like events) most of the defects underlying CAH. In this study, we describe an efficient strategy to identify molecular defects causing CAH: polymerase chain reaction-amplified CYP21 loci are cloned and hybridized to a set of oligonucleotides, allowing rapid and allele-specific identification of all known CYP21B mutations relevant to 21-hydroxylase function. Possible new mutations can be identified by subsequent nucleic acid sequencing provided they reside within the cloned CYP21B fragment (from the TATA box to the 8th of the 10 CYP21B gene exons). Using this method, the CYP21B gene mutations of a heterozygous carrier and 25 CAH patients have been identified by oligonucleotide hybridization. All disease haplotypes seem to have been generated by recombinational events involving the CYP21A pseudogene. In 5 individuals, these data were subsequently verified by nucleic acid sequencing. The procedure can be used for diagnostic applications and may facilitate identification of new CYP21B defects.
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Affiliation(s)
- A Helmberg
- Department for Molecular Biology, University of Innsbruck Medical School, Austria
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