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Barnes JW, Duncan D, Helton S, Hutcheson S, Kurundkar D, Logsdon NJ, Locy M, Garth J, Denson R, Farver C, Vo HT, King G, Kentrup D, Faul C, Kulkarni T, De Andrade JA, Yu Z, Matalon S, Thannickal VJ, Krick S. Role of fibroblast growth factor 23 and klotho cross talk in idiopathic pulmonary fibrosis. Am J Physiol Lung Cell Mol Physiol 2019; 317:L141-L154. [PMID: 31042083 PMCID: PMC6689746 DOI: 10.1152/ajplung.00246.2018] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 04/10/2019] [Accepted: 04/28/2019] [Indexed: 01/24/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive fibrosing interstitial pneumonia that mainly affects the elderly. Several reports have demonstrated that aging is involved in the underlying pathogenic mechanisms of IPF. α-Klotho (KL) has been well characterized as an "age-suppressing" hormone and can provide protection against cellular senescence and oxidative stress. In this study, KL levels were assessed in human plasma and primary lung fibroblasts from patients with idiopathic pulmonary fibrosis (IPF-FB) and in lung tissue from mice exposed to bleomycin, which showed significant downregulation when compared with controls. Conversely, transgenic mice overexpressing KL were protected against bleomycin-induced lung fibrosis. Treatment of human lung fibroblasts with recombinant KL alone was not sufficient to inhibit transforming growth factor-β (TGF-β)-induced collagen deposition and inflammatory marker expression. Interestingly, fibroblast growth factor 23 (FGF23), a proinflammatory circulating protein for which KL is a coreceptor, was upregulated in IPF and bleomycin lungs. To our surprise, FGF23 and KL coadministration led to a significant reduction in fibrosis and inflammation in IPF-FB; FGF23 administration alone or in combination with KL stimulated KL upregulation. We conclude that in IPF downregulation of KL may contribute to fibrosis and inflammation and FGF23 may act as a compensatory antifibrotic and anti-inflammatory mediator via inhibition of TGF-β signaling. Upon restoration of KL levels, the combination of FGF23 and KL leads to resolution of inflammation and fibrosis. Altogether, these data provide novel insight into the FGF23/KL axis and its antifibrotic/anti-inflammatory properties, which opens new avenues for potential therapies in aging-related diseases like IPF.
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Affiliation(s)
- Jarrod W Barnes
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Dawn Duncan
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Scott Helton
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Samuel Hutcheson
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Deepali Kurundkar
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Naomi J Logsdon
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Morgan Locy
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Jaleesa Garth
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Rebecca Denson
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Carol Farver
- Department of Pathology, Cleveland Clinic , Cleveland, Ohio
| | - Hai T Vo
- Department of Neurobiology, The University of Alabama at Birmingham , Birmingham, Alabama
| | - Gwendalyn King
- Department of Neurobiology, The University of Alabama at Birmingham , Birmingham, Alabama
| | - Dominik Kentrup
- Division of Nephrology and Hypertension, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Christian Faul
- Division of Nephrology and Hypertension, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Tejaswini Kulkarni
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Joao A De Andrade
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
- Birmingham VA Medical Center , Birmingham, Alabama
| | - Zhihong Yu
- Department of Anesthesiology and Perioperative Medicine (Molecular and Translational Biomedicine), University of Alabama , Birmingham, Alabama
| | - Sadis Matalon
- Department of Anesthesiology and Perioperative Medicine (Molecular and Translational Biomedicine), University of Alabama , Birmingham, Alabama
| | - Victor J Thannickal
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
| | - Stefanie Krick
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, The University of Alabama , Birmingham, Alabama
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Sodré CP, Guilherme RS, Meloni VFA, Brunoni D, Juliano Y, Andrade JAD, Belangero SIN, Christofolini DM, Kulikowski LD, Melaragno MI. Ring chromosome instability evaluation in six patients with autosomal rings. Genet Mol Res 2010; 9:134-43. [PMID: 20198569 DOI: 10.4238/vol9-1gmr707] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Ring chromosomes are often associated with abnormal phenotypes due to loss of genomic material and also because of ring instability at mitosis after sister chromatid exchange events. We investigated ring chromosome instability in six patients with ring chromosomes 4, 14, 15, and 18 by examining 48- and 72-h lymphocyte cultures at the first, second and subsequent cell divisions after bromodeoxyuridine incorporation. Although most cells from all patients showed only one monocentric ring chromosome, ring chromosome loss and secondary aberrations were observed both in 48- and 72-h lymphocyte cultures and in metaphase cells of the different cell generations. We found no clear-cut correlation between ring size and ring instability; we also did not find differences between apparently complete rings and rings with genetic material loss. The cytogenetic findings revealed secondary aberrations in all ring chromosome patients. We concluded that cells with ring chromosome instability can multiply and survive in vivo, and that they can influence the patient's phenotype.
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Affiliation(s)
- C P Sodré
- Departamento de Morfologia e Genética da Universidade Federal de São Paulo, São Paulo, SP, Brasil
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Takeno SS, Corbani M, Andrade JAD, Smith MDAC, Brunoni D, Melaragno MI. Duplication 4p and deletion 4p (Wolf-Hirschhorn syndrome) due to complementary gametes from a 3:1 segregation of a maternal balanced t(4;13)(p16;q11) translocation. ACTA ACUST UNITED AC 2004; 129A:180-3. [PMID: 15316961 DOI: 10.1002/ajmg.a.30224] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/10/2022]
Abstract
We present clinical and cytogenetic data on a family with a t(4;13)(p16;q11) translocation present in four generations. The balanced translocation resulted in one individual with monosomy 4p and one individual with trisomy 4p, due to 3:1 segregation. The male patient with trisomy 4p was fertile and transmitted the extra chromosome to his daughter.
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Affiliation(s)
- S S Takeno
- Genetics Division, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Dalla Torre CA, Maciel RMB, Pinheiro NA, Andrade JAD, De Toledo SRC, Villa LL, Cerutti JM. TRAP-silver staining, a highly sensitive assay for measuring telomerase activity in tumor tissue and cell lines. Braz J Med Biol Res 2002; 35:65-8. [PMID: 11743616 DOI: 10.1590/s0100-879x2002000100009] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 11/22/2022] Open
Abstract
Measurement of telomerase activity in clinically obtained tumor samples may provide important information for use as both a diagnostic marker and a prognostic indicator for patient outcome. In order to evaluate telomerase activity in tumor tissue without radiolabeling the product, we developed a simple telomeric repeat amplification protocol-silver-staining assay that is less time-consuming, is safe and requires minimal equipment. In addition, we determined the sensitivity of the silver-staining method by using extracts of telomerase-positive thyroid carcinoma cell lines which were serially diluted from 5,000 to 10 cells. Telomerase activity was also assayed in 19 thyroid tumors, 2 normal controls and 27 bone marrow aspirates. The results indicate that the technique permits the detection of telomerase activity from 5000 to as few as 10 cells. We propose that it could be immediately applicable in many laboratories due to the minimal amount of equipment required.
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Affiliation(s)
- C A Dalla Torre
- Divisão de Genética, Departamento de Morfologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
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