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Persson HL, Vainikka LK. Increased Lysosomal Membrane Permeabilization in Oxidant-exposed Macrophages of Human Fibrotic Lungs. J Cell Death 2013; 6:69-74. [PMID: 25278780 PMCID: PMC4147753 DOI: 10.4137/jcd.s13271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 11/12/2013] [Accepted: 11/15/2013] [Indexed: 11/13/2022] Open
Abstract
A disrupted balance of reduced glutathione (GSH) and iron (Fe) and subsequent enhanced susceptibility of lysosomes of lung macrophages (LMs) to oxidants may play a role in lung fibrogenesis. We assessed cellular Fe/GSH, lysosomal membrane permeabilization (LMP), and cell death in cultures of oxidant exposed LMs. LMs from 7 lung fibrosis patients and healthy subjects were exposed to a physiologic concentration of H2O2 for 1 h. LMP was assessed with acridine orange green fluorescence, apoptosis/necrosis were estimated by apoptotic DNA and typical morphology, Fe was assessed with Prussian blue staining/atomic absorption spectrophotometry, and GSH was evaluated using a GSH assay kit. Oxidant-induced LMP and cell death were more pronounced in cultures of LMs from patients with lung fibrosis, and these cells contained less GSH and more cytochemically stained Fe. These observations indicate that LMP may be involved in fibrosis development, possibly through activation of the inflammasome complex. Further studies are warranted for a detailed understanding.
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Affiliation(s)
- Hans L Persson
- Division of Pulmonary Medicine, Department of Medical and Health Sciences, Faculty of Health Sciences, Linköping University, Department of Respiratory Medicine UHL, Centre for Surgery and Oncology, County Council of Östergötland, Linköping, Sweden
| | - Linda K Vainikka
- Division of Experimental Pathology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
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Arriola Benitez PC, Scian R, Comerci DJ, Serantes DR, Vanzulli S, Fossati CA, Giambartolomei GH, Delpino MV. Brucella abortus induces collagen deposition and MMP-9 down-modulation in hepatic stellate cells via TGF-β1 production. THE AMERICAN JOURNAL OF PATHOLOGY 2013; 183:1918-1927. [PMID: 24113459 DOI: 10.1016/j.ajpath.2013.08.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/02/2013] [Accepted: 08/12/2013] [Indexed: 01/18/2023]
Abstract
In patients with active brucellosis, the liver is frequently affected by histopathologic lesions, such as granulomas, inflammatory infiltrations, and parenchymal necrosis. Herein, we examine some potential mechanisms of liver damage in brucellosis. We demonstrate that Brucella abortus infection inhibits matrix metalloproteinase-9 (MMP-9) secretion and induces collagen deposition and tissue inhibitor of matrix metalloproteinase-1 secretion induced by hepatic stellate cells (LX-2). These phenomena depend on transforming growth factor-β1 induction. In contrast, supernatants from B. abortus-infected hepatocytes and monocytes induce MMP-9 secretion and inhibit collagen deposition in hepatic stellate cells. Yet, if LX-2 cells are infected with B. abortus, the capacity of supernatants from B. abortus-infected hepatocytes and monocytes to induce MMP-9 secretion and inhibit collagen deposition is abrogated. These results indicate that depending on the balance between interacting cells and cytokines of the surrounding milieu, the response of LX-2 cells could be turned into an inflammatory or fibrogenic phenotype. Livers from mice infected with B. abortus displayed a fibrogenic phenotype with patches of collagen deposition and transforming growth factor-β1 induction. This study provides potential mechanisms of liver immune response induced by B. abortus-infected hepatic stellate cells. In addition, these results demonstrate that the cross talk of these cells with hepatocytes and macrophages implements a series of interactions that may contribute to explaining some of mechanisms of liver damage observed in human brucellosis.
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Affiliation(s)
- Paula C Arriola Benitez
- Institute of Immunology, Genetics, and Metabolism, Jose de San Martin Clinical Hospital, Faculty of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - Romina Scian
- Institute of Immunology, Genetics, and Metabolism, Jose de San Martin Clinical Hospital, Faculty of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - Diego J Comerci
- Biotechnology Research Institute, Technology Institute of Chascomús, National University of San Martin National Scientific and Technical Research, Buenos Aires, Argentina
| | - Diego Rey Serantes
- Biotechnology Research Institute, Technology Institute of Chascomús, National University of San Martin National Scientific and Technical Research, Buenos Aires, Argentina
| | - Silvia Vanzulli
- Institute of Experimental Medicine, National Academy of Medicine, Buenos Aires, Argentina
| | - Carlos A Fossati
- Institute for the Study of Humoral Immunity, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina; Laboratory of Immune System Research, Faculty of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Guillermo H Giambartolomei
- Institute of Immunology, Genetics, and Metabolism, Jose de San Martin Clinical Hospital, Faculty of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - M Victoria Delpino
- Institute of Immunology, Genetics, and Metabolism, Jose de San Martin Clinical Hospital, Faculty of Medicine, University of Buenos Aires, Buenos Aires, Argentina.
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