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Detsika MG, Theochari E, Palamaris K, Gakiopoulou H, Lianos EA. Effect of Heme Oxygenase-1 Depletion on Complement Regulatory Proteins Expression in the Rat. Antioxidants (Basel) 2022; 12:61. [PMID: 36670923 PMCID: PMC9854825 DOI: 10.3390/antiox12010061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
Heme oxygenase has been implicated in the regulation of various immune responses including complement activation. Using a transgenic rat model of HO-1 depletion, the present study assessed the effect of HO-1 absence on the expression of complement regulatory proteins: decay accelerating factor (DAF), CR1-related gene/protein Y (Crry) and CD59, which act to attenuate complement activation. Protein expression was assessed by immunohistochemistry in kidney, liver, lung and spleen tissues. DAF protein was reduced in all tissues retrieved from rats lacking HO-1 (Hmox1-/-) apart from spleen tissue sections. Crry protein was also reduced, but only in Hmox1-/- kidney and liver tissue. C3b staining was augmented in the kidney and spleen from Hmox1-/- rats, suggesting that the decrease of DAF and Crry was sufficient to increase C3b deposition. The observations support an important role of HO-1 as a regulator of the complement system.
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Affiliation(s)
- Maria G. Detsika
- GP Livanos and M Simou Laboratories, 1st Department of Critical Care Medicine & Pulmonary Services, Evangelismos Hospital, National and Kapodistrian University of Athens, 10675 Athens, Greece
| | - Eirini Theochari
- Department of Pathology, School of Medicine, University of Athens, 11527 Athens, Greece
| | - Kostas Palamaris
- Department of Pathology, School of Medicine, University of Athens, 11527 Athens, Greece
| | - Harikleia Gakiopoulou
- Department of Pathology, School of Medicine, University of Athens, 11527 Athens, Greece
| | - Elias A. Lianos
- Veterans Affairs Medical Center and Virginia Tech, Carilion School of Medicine, Salem, VA 24153, USA
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Detsika MG, Lianos EA. Regulation of Complement Activation by Heme Oxygenase-1 (HO-1) in Kidney Injury. Antioxidants (Basel) 2021; 10:antiox10010060. [PMID: 33418934 PMCID: PMC7825075 DOI: 10.3390/antiox10010060] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 12/31/2020] [Accepted: 01/01/2021] [Indexed: 12/20/2022] Open
Abstract
Heme oxygenase is a cytoprotective enzyme with strong antioxidant and anti-apoptotic properties. Its cytoprotective role is mainly attributed to its enzymatic activity, which involves the degradation of heme to biliverdin with simultaneous release of carbon monoxide (CO). Recent studies uncovered a new cytoprotective role for heme oxygenase-1 (HO-1) by identifying a regulatory role on the complement control protein decay-accelerating factor. This is a key complement regulatory protein preventing dysregulation or overactivation of complement cascades that can cause kidney injury. Cell-specific targeting of HO-1 induction may, therefore, be a novel approach to attenuate complement-dependent forms of kidney disease.
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Affiliation(s)
- Maria G. Detsika
- First Department of Critical Care Medicine & Pulmonary Services, GP Livanos and M. Simou Laboratories, National & Kapodistrian University of Athens, Medical School, Evangelismos Hospital, 10675 Athens, Greece
- Correspondence: ; Tel.: +30-210-723552; Fax: +30-210-7239127
| | - Elias A. Lianos
- Thorax Foundation, Research Center of Intensive Care and Emergency Thoracic Medicine, 10675 Athens, Greece;
- Veterans Affairs Medical Center and Virginia Tech, Carilion School of Medicine, 1970 Roanoke Blvd, Salem, VA 24153, USA
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Meng L, Cao S, Lin N, Zhao J, Cai X, Liang Y, Huang K, Lin M, Chen X, Li D, Wang J, Yang L, Wei A, Li G, Lu Q, Guo Y, Wei Q, Tan J, Huang M, Huang Y, Wang J, Liu Y. Identification of a Novel ACTN4 Gene Mutation Which Is Resistant to Primary Nephrotic Syndrome Therapy. BIOMED RESEARCH INTERNATIONAL 2019; 2019:5949485. [PMID: 31930129 PMCID: PMC6942772 DOI: 10.1155/2019/5949485] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 10/28/2019] [Indexed: 02/07/2023]
Abstract
ACTN4, a gene which codes for the protein α-actinin-4, is critical for the maintenance of the renal filtration barrier. It is well known that ACTN4 mutations can lead to kidney dysfunction, such as familial focal segmental glomerulosclerosis (FSGS), a common cause of primary nephrotic syndrome (PNS). To elucidate whether other mutations of ACTN4 exist in PNS patients, we sequenced the ACTN4 gene in biopsies collected from 155 young PNS patients (≤16 years old). The patients were classified into five groups: FSGS, minimal change nephropathy, IgA nephropathy, membranous nephropathy, and those without renal puncture. Ninety-eight healthy people served as controls. Samples were subjected to Illumina's next generation sequencing protocols using FastTarget target gene capture method. We identified 5 ACTN4 mutations which occurred only in PNS patients: c.1516G > A (p.G506S) on exon 13 identified in two PNS patients, one with minimal change nephropathy and another without renal puncture; c.1442 + 10G > A at the splice site in a minimal change nephropathy patient; c.2191-4G > A at the cleavage site, identified from two FSGS patients; and c.1649A > G (p.D550G) on exon 14 together with c.2191-4G > A at the cleavage sites, identified from two FSGS patients. Among these, c.1649A > G (p.D550G) is a novel ACTN4 mutation. Patients bearing the last two mutations exhibited resistance to clinical therapies.
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Affiliation(s)
- Lingzhang Meng
- Center for Systemic Inflammation Research, School of Preclinical Medicine, Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Shan Cao
- Graduate School of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
- Department of Pediatrics, Shanghai Pudong Hospital, Shanghai, China
| | - Na Lin
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Jingjie Zhao
- Research Center for Clinics and Biosciences, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Xulong Cai
- Department of Pediatrics, Yancheng Third People's Hospital Yancheng City, Yancheng, Jiangsu Province, China
| | - Yonghua Liang
- Graduate School of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Ken Huang
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Mali Lin
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Xiajing Chen
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Dongming Li
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Junli Wang
- Department of Laboratory, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Lijuan Yang
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Aibo Wei
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Genliang Li
- Center for Systemic Inflammation Research, School of Preclinical Medicine, Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Qingmei Lu
- Department of Nursing, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Yuxiu Guo
- Department of Pediatrics, People's Hospital of Baise, Baise, Guangxi Province, China
| | - Qiuju Wei
- Center for Systemic Inflammation Research, School of Preclinical Medicine, Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
- College of Pharmacy, Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Junhua Tan
- First Nephrology Department, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Meiying Huang
- First Nephrology Department, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Yuming Huang
- First Nephrology Department, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Jie Wang
- First Nephrology Department, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
| | - Yunguang Liu
- Center for Systemic Inflammation Research, School of Preclinical Medicine, Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
- Department of Pediatrics, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi Province, China
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Phenotypic characterization of a novel HO-1 depletion model in the rat. Transgenic Res 2016; 26:51-64. [PMID: 27778153 DOI: 10.1007/s11248-016-9986-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/29/2016] [Indexed: 12/17/2022]
Abstract
Although the protective role of HO-1 induction in various forms of kidney disease is well established, mechanisms other than heme catabolism to biliverdin, bilirubin and carbon monoxide have recently been identified. Unraveling these mechanisms requires the generation of appropriate animal models. The present study describes the generation of a HO-1 deficient Hmox1 -/- rat model and characterizes its renal and extrarenal phenotype. Hmox1 -/- rats had growth retardation and splenomegaly compared to their Hmox1 +/+ littermates. Focal segmental glomerulosclerosis-type lesions and interstitial inflammatory infiltrates were prominent morphologic findings and were associated with increased blood urea nitrogen, serum creatinine and albuminuria. There was no increase in iron deposition in glomeruli, tubules or interstitium. Iron deposition in spleen and liver was reduced. Electron microscopic examination of glomeruli revealed edematous podocytes with scant areas of foot process effacement but otherwise well preserved processes and slit-diaphragms. Of the filtration barrier proteins examined, β-catenin expression was markedly reduced both in glomeruli and extrarenal tissues. Since the rat is the preferred laboratory animal in experimental physiology and pathophysiology, the rat model of HO-1 deficiency may provide a novel tool for investigation of the role of this enzyme in renal function and disease.
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