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Oliveira LCG, Febba AC, dos Santos L, Ribeiro LAF, Azinheira Nobrega Cruz N, Bello MM, Cenedeze MA, Tedesco-Silva H, Medina-Pestana JO, Casarini DE. Abstract P256: Higher Angiotensin Converting Enzymes Activities Are Observed In Covid-19 Positive Volunteers. Hypertension 2022. [DOI: 10.1161/hyp.79.suppl_1.p256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The high transmissibility and the broad spectrum of clinical manifestations of COVID-19 are in part due to the high affinity of SARS-CoV-2 for its receptor, Angiotensin Converting Enzyme 2 (ACE2). The depletion of the biological functions of ACE2, due to the internalization of the receptor along with SARS-CoV-2, leads to impairment of Renin Angiotensin System (RAS), which can contribute to COVID-19 pathogenesis. In addition, genetic differences in RAS may be associated with more severe symptoms and complications observed in COVID-19 patients. This study aims to perform a comparative analysis between COVID-19 positive patients and uninfected individuals, to correlate such disease profiles with ACE I/D (Insertion/Deletion) and ACE2 G8790A polymorphisms, and their enzymatic activities. The anthropometric, demographic, clinical and cardiovascular parameters of 764 individuals from Ipaussu/SP (Brazil) were evaluated. ACE and ACE2 activities were measured by fluorometric assays, and assessment of both enzymes polymorphisms was performed by PCR. In this cohort, 35,2% (269 of 764) the volunteers were positive for COVID-19. The prevalence of COVID-19 was higher among women (67%) and individuals aged between 18 and 49 years. Also, comorbidities as obesity and arterial hypertension were more frequent in the positive group, when considered individuals under 60 years old. Higher ACE and ACE2 enzymatic activities were observed in positive group (46.4 vs 41.6 and 11.3 vs 8.5, respectively). Individuals with ID genotype in the positive group presented higher ACE activity compared to individuals with same genotype in control group (46.9 vs 41.7). In the positive group, ACE activity was increased in the DD (54.5) when compared to ID (46.9) and II (37.9) genotypes. No significant differences related to ACE2 activity and polymorphism were observed. ACE/ACE2 activity ratio was higher in the COVID-19 negative group (4.7 vs 3.7). The increased ACE activity for the DD genotype was in line with the literature data for hypertension and cardiovascular diseases. We can suggest a synergic effect between ACE DD genotype and COVID-19 infection enhancing ACE activity, what may contribute to pro-inflammatory phenotype and more severe symptoms of COVID-19.
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Felizardo RJF, de Almeida DC, Pereira RL, Watanabe IKM, Doimo NTS, Ribeiro WR, Cenedeze MA, Hiyane MI, Amano MT, Braga TT, Ferreira CM, Parmigiani RB, Andrade-Oliveira V, Volpini RA, Vinolo MAR, Mariño E, Robert R, Mackay CR, Camara NOS. Gut microbial metabolite butyrate protects against proteinuric kidney disease through epigenetic- and GPR109a-mediated mechanisms. FASEB J 2019; 33:11894-11908. [PMID: 31366236 DOI: 10.1096/fj.201901080r] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [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: 02/07/2023]
Abstract
Butyrate is a short-chain fatty acid derived from the metabolism of indigestible carbohydrates by the gut microbiota. Butyrate contributes to gut homeostasis, but it may also control inflammatory responses and host physiology in other tissues. Butyrate inhibits histone deacetylases, thereby affecting gene transcription, and also signals through the metabolite-sensing G protein receptor (GPR)109a. We produced an mAb to mouse GPR109a and found high expression on podocytes in the kidney. Wild-type and Gpr109a-/- mice were induced to develop nephropathy by a single injection of Adriamycin and treated with sodium butyrate or high butyrate-releasing high-amylose maize starch diet. Butyrate improved proteinuria by preserving podocyte at glomerular basement membrane and attenuated glomerulosclerosis and tissue inflammation. This protective phenotype was associated with increased podocyte-related proteins and a normalized pattern of acetylation and methylation at promoter sites of genes essential for podocyte function. We found that GPR109a is expressed by podocytes, and the use of Gpr109a-/- mice showed that the protective effects of butyrate depended on GPR109a expression. A prebiotic diet that releases high amounts of butyrate also proved highly effective for protection against kidney disease. Butyrate and GPR109a play a role in the pathogenesis of kidney disease and provide one of the important molecular connections between diet, the gut microbiota, and kidney disease.-Felizardo, R. J. F., de Almeida, D. C., Pereira, R. L., Watanabe, I. K. M., Doimo, N. T. S., Ribeiro, W. R., Cenedeze, M. A., Hiyane, M. I., Amano, M. T., Braga, T. T., Ferreira, C. M., Parmigiani, R. B., Andrade-Oliveira, V., Volpini, R. A., Vinolo, M. A. R., Mariño, E., Robert, R., Mackay, C. R., Camara, N. O. S. Gut microbial metabolite butyrate protects against proteinuric kidney disease through epigenetic- and GPR109a-mediated mechanisms.
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Affiliation(s)
- Raphael J F Felizardo
- Nephrology Division, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil.,Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil.,Department of Biochemistry and Molecular Biology, Biodiscovery Institute, Monash University, Clayton, Victoria, Australia
| | - Danilo C de Almeida
- Nephrology Division, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil.,Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil
| | - Rafael L Pereira
- Department of Physiology, Universidade Federal do Paraná, Curitiba, Brazil
| | - Ingrid K M Watanabe
- Nephrology Division, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil.,Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil
| | - Nayara T S Doimo
- Center for Molecular Oncology, Hospital Sírio-Libanês, São Paulo, Brazil
| | - Willian R Ribeiro
- Department of Pharmaceutics Sciences, Institute of Environmental Chemistry and Pharmaceutical Sciences, Universidade Federal de São Paulo, Diadema, Brazil
| | - Marcos A Cenedeze
- Nephrology Division, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Meire I Hiyane
- Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil
| | - Mariane T Amano
- Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil.,Center for Molecular Oncology, Hospital Sírio-Libanês, São Paulo, Brazil
| | - Tárcio T Braga
- Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil
| | - Caroline M Ferreira
- Department of Pharmaceutics Sciences, Institute of Environmental Chemistry and Pharmaceutical Sciences, Universidade Federal de São Paulo, Diadema, Brazil
| | | | - Vinicius Andrade-Oliveira
- Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil
| | - Rildo A Volpini
- Laboratório de Investigação Médica 12 (LIM12), Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Marco Aurélio R Vinolo
- Department of Genetics, Evolution, Microbiology, and Immunology, Institute of Biology, Universidade Estadual de Campinas, Campinas, Brazil
| | - Eliana Mariño
- Department of Biochemistry and Molecular Biology, Biodiscovery Institute, Monash University, Clayton, Victoria, Australia
| | - Remy Robert
- Department of Biochemistry and Molecular Biology, Biodiscovery Institute, Monash University, Clayton, Victoria, Australia
| | - Charles R Mackay
- Department of Biochemistry and Molecular Biology, Biodiscovery Institute, Monash University, Clayton, Victoria, Australia
| | - Niels O S Camara
- Nephrology Division, Department of Medicine, Universidade Federal de São Paulo, São Paulo, Brazil.,Department of Immunology, Institute of Biomedical Sciences IV, Universidade de São Paulo, São Paulo, Brazil
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3
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Henao Agudelo JS, Braga TT, Amano MT, Cenedeze MA, Cavinato RA, Peixoto-Santos AR, Muscará MN, Teixeira SA, Cruz MC, Castoldi A, Sinigaglia-Coimbra R, Pacheco-Silva A, de Almeida DC, Camara NOS. Mesenchymal Stromal Cell-Derived Microvesicles Regulate an Internal Pro-Inflammatory Program in Activated Macrophages. Front Immunol 2017; 8:881. [PMID: 28824619 PMCID: PMC5535070 DOI: 10.3389/fimmu.2017.00881] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Accepted: 07/11/2017] [Indexed: 12/20/2022] Open
Abstract
Mesenchymal stromal cells (MSCs) are multipotent cells with abilities to exert immunosuppressive response promoting tissue repair. Studies have shown that MSCs can secrete extracellular vesicles (MVs-MSCs) with similar regulatory functions to the parental cells. Furthermore, strong evidence suggesting that MVs-MSCs can modulate several immune cells (i.e., Th1, Th17, and Foxp3+ T cells). However, their precise effect on macrophages (Mϕs) remains unexplored. We investigated the immunoregulatory effect of MVs-MSCs on activated M1-Mϕs in vitro and in vivo using differentiated bone marrow Mϕs and an acute experimental model of thioglycollate-induced peritonitis, respectively. We observed that MVs-MSCs shared surface molecules with MSCs (CD44, CD105, CD90, CD73) and expressed classical microvesicle markers (Annexin V and CD9). The in vitro treatment with MVs-MSCs exerted a regulatory-like phenotype in M1-Mϕs, which showed higher CD206 level and reduced CCR7 expression. This was associated with decreased levels of inflammatory molecules (IL-1β, IL-6, nitric oxide) and increased immunoregulatory markers (IL-10 and Arginase) in M1-Mϕs. In addition, we detected that MVs-MSCs promoted the downregulation of inflammatory miRNAs (miR-155 and miR-21), as well as, upregulated its predicted target gene SOCS3 in activated M1-Mϕs. In vivo MVs-MSCs treatment reduced the Mϕs infiltrate in the peritoneal cavity inducing a M2-like regulatory phenotype in peritoneal Mϕs (higher arginase activity and reduced expression of CD86, iNOS, IFN-γ, IL-1β, TNF-α, IL-1α, and IL-6 molecules). This in vivo immunomodulatory effect of MVs-MSCs on M1-Mϕs was partially associated with the upregulation of CX3CR1 in F4/80+/Ly6C+/CCR2+ Mϕs subsets. In summary, our findings indicate that MVs-MSCs can modulate an internal program in activated Mϕs establishing an alternative regulatory-like phenotype.
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Affiliation(s)
- Juan S Henao Agudelo
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil
| | - Tarcio T Braga
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil
| | - Mariane T Amano
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil
| | - Marcos A Cenedeze
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil
| | - Regiane A Cavinato
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil
| | - Amandda R Peixoto-Santos
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil
| | - Marcelo N Muscará
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil
| | - Simone A Teixeira
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil
| | - Mario C Cruz
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil
| | - Angela Castoldi
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil
| | | | - Alvaro Pacheco-Silva
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil.,IEP, Albert Einstein Hospital, Sao Paulo, Brazil
| | - Danilo C de Almeida
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil
| | - Niels Olsen Saraiva Camara
- Department of Medicine, Division of Nephrology, Federal University of São Paulo, Sao Paulo, Brazil.,Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Sao Paulo, Brazil.,Laboratory of Renal Pathophysiology, Department of Medicine, School of Medicine, University of São Paulo, Sao Paulo, Brazil
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4
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Perandini LA, Sales-de-Oliveira D, Almeida DC, Azevedo H, Moreira-Filho CA, Cenedeze MA, Benatti FB, Lima FR, Borba E, Bonfa E, Sa-Pinto AL, Roschel H, Camara NOS, Gualano B. Effects of acute aerobic exercise on leukocyte inflammatory gene expression in systemic lupus erythematosus. Exerc Immunol Rev 2016; 22:64-81. [PMID: 26859426] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
UNLABELLED Systemic lupus erythematosus (SLE) is an autoimmune disease with a persistent systemic inflammation. Exercise induced inflammatory response in SLE remains to be fully elucidated. The aim of this study was to assess the effects of acuteexercise on leukocyte gene expression in active (SLEACTIVE) and inactive SLE (SLEINACTIVE) patients and healthy controls(HC). METHODS All subjects (n = 4 per group) performed a 30-min single bout of acute aerobic exercise (~70% of VO2peak) on a treadmill, and blood samples were collected for RNA extraction from circulating leukocyte at baseline, at the end of exercise, and after three hours of recovery. The expression of a panel of immune-related genes was evaluated by a quantitative PCR array assay. Moreover, network-based analyses were performed to interpret transcriptional changes occurring after the exercise challenge. RESULTS In all groups, a single bout of acute exercise led to the down-regulation of the gene expression of innate and adaptive immunity at the end of exercise (e.g., TLR3, IFNG, GATA3, FOXP3, STAT4) with a subsequent up-regulation occurring upon recovery. Exercise regulated the expression of inflammatory genes in the blood leukocytes of the SLE patients and HC, although the SLE groups exhibited fewer modulated genes and less densely connected networks (number of nodes: 29, 40 and 58; number of edges: 29, 60 and 195; network density: 0.07, 0.08 and 0.12, for SLEACTIVE, SLEINACTIVE and HC, respectively). CONCLUSION The leukocytes from the SLE patients, irrespective of disease activity, showed a down-regulated inflammatory geneexpression immediately after acute aerobic exercise, followed by an up-regulation at recovery. Furthermore, less organized gene networks were observed in the SLE patients, suggesting that they may be deficient in triggering a normal exercised-induced immune transcriptional response.
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Affiliation(s)
- L A Perandini
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - D Sales-de-Oliveira
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - D C Almeida
- Laboratory of Clinical and Experimental Immunology, Department of Medicine, Division of Nephrology, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - H Azevedo
- Laboratory of Pediatric Genomics, Department of Pediatrics, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - C A Moreira-Filho
- Laboratory of Pediatric Genomics, Department of Pediatrics, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - M A Cenedeze
- Laboratory of Clinical and Experimental Immunology, Department of Medicine, Division of Nephrology, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - F B Benatti
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
- School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
| | - F R Lima
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - E Borba
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - E Bonfa
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - A L Sa-Pinto
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - H Roschel
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - N O S Camara
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - B Gualano
- Rheumatology Division, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
- School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
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5
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Aguiar CF, Naffah-de-Souza C, Castoldi A, Corrêa-Costa M, Braga TT, Naka ÉL, Amano MT, Abate DTRS, Hiyane MI, Cenedeze MA, Pacheco e Silva Filho A, Câmara NOS. Administration of α-Galactosylceramide Improves Adenine-Induced Renal Injury. Mol Med 2015; 21:553-62. [PMID: 26101952 DOI: 10.2119/molmed.2014.00090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 06/12/2015] [Indexed: 11/06/2022] Open
Abstract
Natural killer T (NKT) cells are a subset of lymphocytes that reacts to glycolipids presented by CD1d. Invariant NKT cells (iNKT) correspond to >90% of the total population of NKTs and reacts to α-galactosylceramide (αGalCer). αGalCer promotes a complex mixture of Th1 and Th2 cytokines, as interferon (IFN)-γ and interleukin (IL)-4. NKT cells and IFN-γ are known to participate in some models of renal diseases, but further studies are still necessary to elucidate their mechanisms. The aim of our study was to analyze the participation of iNKT cells in an experimental model of tubule-interstitial nephritis. We used 8-wk-old C57BL/6j, Jα18KO and IFN-γKO mice. They were fed a 0.25% adenine diet for 10 d. Both adenine-fed wild-type (WT) and Jα18KO mice exhibited renal dysfunction, but adenine-fed Jα18KO mice presented higher expression of kidney injury molecule-1 (KIM-1), tumor necrosis factor (TNF)-α and type I collagen. To analyze the role of activated iNKT cells in our model, we administered αGalCer in WT mice during adenine ingestion. After αGalCer injection, we observed a significant reduction in serum creatinine, proinflammatory cytokines and renal fibrosis. However, this improvement in renal function was not observed in IFN-γKO mice after αGalCer treatment and adenine feeding, illustrating that this cytokine plays a role in our model. Our findings may suggest that IFN-γ production is one of the factors contributing to improved renal function after αGalCer administration.
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Affiliation(s)
- Cristhiane Favero Aguiar
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil.,Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Cristiane Naffah-de-Souza
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Angela Castoldi
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Matheus Corrêa-Costa
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Tárcio T Braga
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Érika L Naka
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
| | - Mariane T Amano
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Débora T R S Abate
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Meire I Hiyane
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
| | - Marcos A Cenedeze
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
| | - Alvaro Pacheco e Silva Filho
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil.,Instituto Israelita de Ensino e Pesquisa Albert Einstein, Renal Transplantation Unit, Albert Einstein Hospital, São Paulo, Brazil
| | - Niels O S Câmara
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil.,Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo, Brazil
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6
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Amorim CEN, Nogueira E, Almeida SS, Gomes PPG, Bacurau RFP, Ozaki KS, Cenedeze MA, Silva Filho AP, Câmara NOS, Araujo RC. Clinical impact of an angiotensin I-converting enzyme insertion/deletion and kinin B2 receptor +9/-9 polymorphisms in the prognosis of renal transplantation. Biol Chem 2013; 394:369-77. [PMID: 23362199 DOI: 10.1515/hsz-2012-0314] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 01/17/2013] [Indexed: 12/18/2022]
Abstract
There is a consensus in the scientific literature that supports the importance of the kallikrein kinin and renin angiotensin systems in renal physiology, but few studies have investigated their importance after renal transplantation. The aim of this study was to investigate the clinical effects of the insertion/deletion polymorphism in the angiotensin I-converting enzyme (ACE) gene and the +9/-9 polymorphism in the kinin B2 receptor (B2R) gene in kidney-transplanted patients (n=215 ACE, n=203 B2R) compared with 443 healthy individuals. Demographic results showed that there is a higher frequency of the D allele (high plasma ACE activity) and +9 allele (lower B2R expression) in transplant patients compared with control individuals. We also observed a higher frequency of these alleles in patients who had an elevated level of plasma creatinine. At day 7 post-transplantation, we found a higher prevalence of individuals with the DD genotype with elevated plasma creatinine level. Furthermore, individuals with the DD genotype had a higher chronic allograft dysfunction and graft loss compared with the II patient genotype, which showed no loss of graft. Taken together, our data suggest that the DD genotype is an indicator of an unfavorable prognosis following renal transplantation and could be related to kinin modulation.
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Affiliation(s)
- Carlos E N Amorim
- Department of Biophysics, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil
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7
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Silva RC, Landgraf MA, Corrêa-Costa M, Semedo P, Cenedeze MA, Pacheco-Silva A, Landgraf RG, Câmara NO. Acute Kidney Injury Reduces Phagocytic and Microbicidal Capacities of Alveolar Macrophages. Cell Physiol Biochem 2013; 31:179-88. [DOI: 10.1159/000343359] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2013] [Indexed: 11/19/2022] Open
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8
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Pereira RL, Reis VO, Semedo P, Buscariollo BN, Donizetti-Oliveira C, Cenedeze MA, Soares MF, Pacheco-Silva A, Savage PB, Câmara NOS, Keller AC. Invariant natural killer T cell agonist modulates experimental focal and segmental glomerulosclerosis. PLoS One 2012; 7:e32454. [PMID: 22427838 PMCID: PMC3299669 DOI: 10.1371/journal.pone.0032454] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 01/30/2012] [Indexed: 01/13/2023] Open
Abstract
A growing body of evidence demonstrates a correlation between Th2 cytokines and the development of focal and segmental glomerulosclerosis (FSGS). Therefore, we hypothesized that GSL-1, a monoglycosylceramide from Sphingomonas ssp. with pro-Th1 activity on invariant Natural Killer T (iNKT) lymphocytes, could counterbalance the Th2 profile and modulate glomerulosclerosis. Using an adriamycin(ADM)-based model of FSGS, we found that BALB/c mice presented albuminuria and glomerular degeneration in association with a Th2-like pro-fibrogenic profile; these mice also expressed a combination of inflammatory cytokines, such as IL-4, IL-1α, IL-1β, IL-17, TNF-α, and chemokines, such as RANTES and eotaxin. In addition, we observed a decrease in the mRNA levels of GD3 synthase, the enzyme responsible for GD3 metabolism, a glycolipid associated with podocyte physiology. GSL-1 treatment inhibited ADM-induced renal dysfunction and preserved kidney architecture, a phenomenon associated with the induction of a Th1-like response, increased levels of GD3 synthase transcripts and inhibition of pro-fibrotic transcripts and inflammatory cytokines. TGF-β analysis revealed increased levels of circulating protein and tissue transcripts in both ADM- and GSL-1-treated mice, suggesting that TGF-β could be associated with both FSGS pathology and iNKT-mediated immunosuppression; therefore, we analyzed the kidney expression of phosphorylated SMAD2/3 and SMAD7 proteins, molecules associated with the deleterious and protective effects of TGF-β, respectively. We found high levels of phosphoSMAD2/3 in ADM mice in contrast to the GSL-1 treated group in which SMAD7 expression increased. These data suggest that GSL-1 treatment modulates the downstream signaling of TGF-β through a renoprotective pathway. Finally, GSL-1 treatment at day 4, a period when proteinuria was already established, was still able to improve renal function, preserve renal structure and inhibit fibrogenic transcripts. In conclusion, our work demonstrates that the iNKT agonist GSL-1 modulates the pathogenesis of ADM-induced glomerulosclerosis and may provide an alternative approach to disease management.
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Affiliation(s)
- Rafael L. Pereira
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
| | - Vanessa O. Reis
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
| | - Patricia Semedo
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
| | - Bruna N. Buscariollo
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
| | | | - Marcos A. Cenedeze
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
| | - Maria Fernanda Soares
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
| | - Alvaro Pacheco-Silva
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
- Unidade de Transplante Renal, Instituto Israelita de Ensino e Pesquisa Albert Einstein, São Paulo, Brasil
| | - Paul B. Savage
- Department of Chemistry and Biochemistry Brigham Young University, Provo, Utah, United States of America
| | - Niels O. S. Câmara
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
- Departamento de Imunologia, Universidade de São Paulo, São Paulo, Brasil
| | - Alexandre C. Keller
- Departamento de Medicina – Nefrologia, Universidade Federal de São Paulo, São Paulo, Brasil
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo, Brasil
- * E-mail:
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9
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Campanholle G, Silva RC, Martins JO, Landgraf MA, Paiva VN, Ferreira RR, Amano MT, Hiyane MI, Cenedeze MA, Pacheco-Silva A, Camara NO, Landgraf RG. Modulation of Lung Allergic Response by Renal Ischemia and Reperfusion Injury. Cell Physiol Biochem 2012; 29:523-32. [DOI: 10.1159/000338506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2012] [Indexed: 11/19/2022] Open
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10
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Correa-Costa M, Semedo P, Monteiro APFS, Silva RC, Pereira RL, Gonçalves GM, Marques GDM, Cenedeze MA, Faleiros ACG, Keller AC, Shimizu MHM, Seguro AC, Reis MA, Pacheco-Silva A, Câmara NOS. Induction of heme oxygenase-1 can halt and even reverse renal tubule-interstitial fibrosis. PLoS One 2010; 5:e14298. [PMID: 21179206 PMCID: PMC3001459 DOI: 10.1371/journal.pone.0014298] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2010] [Accepted: 11/23/2010] [Indexed: 01/08/2023] Open
Abstract
Background The tubule-interstitial fibrosis is the hallmark of progressive renal disease and is strongly associated with inflammation of this compartment. Heme-oxygenase-1 (HO-1) is a cytoprotective molecule that has been shown to be beneficial in various models of renal injury. However, the role of HO-1 in reversing an established renal scar has not yet been addressed. Aim We explored the ability of HO-1 to halt and reverse the establishment of fibrosis in an experimental model of chronic renal disease. Methods Sprague-Dawley male rats were subjected to unilateral ureteral obstruction (UUO) and divided into two groups: non-treated and Hemin-treated. To study the prevention of fibrosis, animals were pre-treated with Hemin at days -2 and -1 prior to UUO. To investigate whether HO-1 could reverse established fibrosis, Hemin therapy was given at days 6 and 7 post-surgery. After 7 and/or 14 days, animals were sacrificed and blood, urine and kidney tissue samples were collected for analyses. Renal function was determined by assessing the serum creatinine, inulin clearance, proteinuria/creatininuria ratio and extent of albuminuria. Arterial blood pressure was measured and fibrosis was quantified by Picrosirius staining. Gene and protein expression of pro-inflammatory and pro-fibrotic molecules, as well as HO-1 were performed. Results Pre-treatment with Hemin upregulated HO-1 expression and significantly reduced proteinuria, albuminuria, inflammation and pro-fibrotic protein and gene expressions in animals subjected to UUO. Interestingly, the delayed treatment with Hemin was also able to reduce renal dysfunction and to decrease the expression of pro-inflammatory molecules, all in association with significantly reduced levels of fibrosis-related molecules and collagen deposition. Finally, TGF-β protein production was significantly lower in Hemin-treated animals. Conclusion Treatment with Hemin was able both to prevent the progression of fibrosis and to reverse an established renal scar. Modulation of inflammation appears to be the major mechanism behind HO-1 cytoprotection.
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Affiliation(s)
- Matheus Correa-Costa
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo (USP), São Paulo, Brazil
| | - Patricia Semedo
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Ana Paula F. S. Monteiro
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Reinaldo C. Silva
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Rafael L. Pereira
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Giselle M. Gonçalves
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo (USP), São Paulo, Brazil
| | - Georgia Daniela Marcusso Marques
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Marcos A. Cenedeze
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Ana C. G. Faleiros
- Pathology Division, Federal University of Triângulo Mineiro (UFTM), Uberaba, Brazil
| | - Alexandre C. Keller
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Maria H. M. Shimizu
- Nephrology Department, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Antônio C. Seguro
- Nephrology Department, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Marlene A. Reis
- Pathology Division, Federal University of Triângulo Mineiro (UFTM), Uberaba, Brazil
| | - Alvaro Pacheco-Silva
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Niels O. S. Câmara
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo (USP), São Paulo, Brazil
- * E-mail:
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11
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Nogueira E, Salomao R, Brunialti MKC, Ozaki KS, Marques GDM, Cenedeze MA, Câmara NOS, Pacheco-Silva A. Expression of TLR-4 and -2 in peripheral mononuclear cells in renal transplant patients with TLR-4 gene polymorphism. Int Immunopharmacol 2010; 10:1481-5. [PMID: 20951669 DOI: 10.1016/j.intimp.2010.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Revised: 09/03/2010] [Accepted: 09/10/2010] [Indexed: 10/18/2022]
Abstract
INTRODUCTION TLR-4 has also been identified as a receptor for endogenous alarmins, which are increased post transplantation. TLR-4 has also been associated with a polymorphism that could impact graft outcome. OBJECTIVE To assess the expression of TLR-4 in kidney transplant patients carrying or not a polymorphism. METHODS TLR-4 polymorphism (A299G/T399I) was studied in 200 renal transplant patients. Healthy volunteers were also enrolled as control group. The polymorphism analysis was performed using restriction enzymes technique (RFLP). Functionality of TLR-4 polymorphism was assessed in samples from controls by quantification of TNF-α after LPS stimulus. TLR-4 and -2 expressions were also analyzed by flow cytometry. RESULTS TLR-4 polymorphism was present in 8.5% of renal transplant patients. This polymorphism was associated with impairment in TNF-α secretion. In general, in renal transplant patients, TLR-4 expression in monocytes and in neutrophils was lower than in health volunteers. TLR-2 and TLR-4 expressions in healthy volunteers with A299G/T399I TLR-4 polymorphism was higher than in wild-type genotype healthy volunteers (p<0.01 and p<0.05, respectively), and also higher than A299G/T399I TLR-4 polymorphism renal transplant patients (p<0.05). TLR-2 expression on neutrophils in wild-type genotype renal transplant patients was higher compared to wild-type genotype healthy volunteers, and was also higher in relation to A299G/T399I kidney transplanted patients (p<0.01). CONCLUSION Stable renal transplant patients with TLR-4 polymorphism have a lower expression of TLR-4 and TLR-2 receptors in peripheral mononuclear cells, which ultimately indicate a less responsiveness for alarmins.
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Affiliation(s)
- Eliana Nogueira
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo (UNIFESP), Brazil.
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12
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Feitoza CQ, Semedo P, Gonçalves GM, Cenedeze MA, Pinheiro HS, Dos Santos OFP, Landgraf RG, Pacheco-Silva A, Câmara NOS. Modulation of inflammatory response by selective inhibition of cyclooxygenase-1 and cyclooxygenase-2 in acute kidney injury. Inflamm Res 2009; 59:167-75. [PMID: 19711010 DOI: 10.1007/s00011-009-0083-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Revised: 08/07/2009] [Accepted: 08/10/2009] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE AND DESIGN This work explored the role of inhibition of cyclooxygenases (COXs) in modulating the inflammatory response triggered by acute kidney injury. MATERIAL C57Bl/6 mice were used. TREATMENT Animals were treated or not with indomethacin (IMT) prior to injury (days -1 and 0). METHODS Animals were subjected to 45 min of renal pedicle occlusion and sacrificed at 24 h after reperfusion. Serum creatinine and blood urea nitrogen, reactive oxygen species (ROS), kidney myeloperoxidase (MPO) activity, and prostaglandin E2 (PGE(2)) levels were analyzed. Tumor necrosis factor (TNF)-alpha, t-bet, interleukin (IL)-10, IL-1beta, heme oxygenase (HO)-1, and prostaglandin E synthase (PGES) messenger RNA (mRNA) were studied. Cytokines were quantified in serum. RESULTS IMT-treated animals presented better renal function with less acute tubular necrosis and reduced ROS and MPO production. Moreover, the treatment was associated with lower expression of TNF-alpha, PGE(2), PGES, and t-bet and upregulation of HO-1 and IL-10. This profile was mirrored in serum, where inhibition of COXs significantly decreased interferon (IFN)-gamma, TNF-alpha, and IL-12 p70 and upregulated IL-10. CONCLUSIONS COXs seem to play an important role in renal ischemia and reperfusion injury, involving the secretion of pro-inflammatory cytokines, activation of neutrophils, and ROS production. Inhibition of COX pathway is intrinsically involved with cytoprotection.
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Affiliation(s)
- Carla Q Feitoza
- Laboratory of Experimental and Clinical Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
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13
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Nogueira E, Ponciano VC, Naka ÉL, Marques GD, Cenedeze MA, Câmara NOS, Pacheco-Silva A. Toll-like receptors-related genes in kidney transplant patients with chronic allograft nephropathy and acute rejection. Int Immunopharmacol 2009; 9:673-6. [DOI: 10.1016/j.intimp.2008.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 11/13/2008] [Indexed: 10/21/2022]
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14
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Ponciano VC, Soares MF, Naka EL, Arruda EF, Cenedeze MA, Franco MF, Pacheco-Silva A, Câmara NOS. Urinary CD20 mRNA as a surrogate of CD20-positive cells infiltration during allograft dysfunction in renal transplant patients. Int Immunopharmacol 2008; 9:663-7. [PMID: 19111631 DOI: 10.1016/j.intimp.2008.11.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Accepted: 11/13/2008] [Indexed: 10/21/2022]
Abstract
B lymphocyte infiltration in renal acute allograft rejection has been associated with steroid resistance and poor outcomes. We aimed to measure CD20 mRNA in urine of renal transplant patients with graft dysfunction and correlate with the histological diagnosis and immunohistochemical (IH) staining for CD20. A total of 48 urine samples were analyzed (21 with acute rejection, 10 with chronic allograft nephropathy, 11 with unspecific tubular lesions, 3 with acute pyelonephritis and 3 with polyomavirus nephropathy). Higher urinary CD20 levels associated with a positive IH staining for CD20 (>50 positive cells/HPF) in renal tissue (p=0.04), with a sensitivity of 83.3% and a specificity of 51.6%. Within the acute rejection group, a positive staining for CD20 was not associated with graft loss, steroid resistance or lack of return to basal creatinine after treatment, but was associated with higher serum creatinine at 3 and 6 months, 1 and 2 years after the acute episode (p<0.05). In conclusion, we showed that urinary levels of CD20 detected by RT-PCR had a high sensitivity for CD20+ staining in the corresponding renal tissue, but with a low specificity. Patients with clusters of CD20+ cells >50/HPF had higher serum creatinine after 2 years of follow up.
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Affiliation(s)
- Viviane C Ponciano
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Universidade Federal de São Paulo, Brazil
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15
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Wang PHM, Campanholle G, Cenedeze MA, Feitoza CQ, Gonçalves GM, Landgraf RG, Jancar S, Pesquero JB, Pacheco-Silva A, Câmara NOS. Bradykinin [corrected] B1 receptor antagonism is beneficial in renal ischemia-reperfusion injury. PLoS One 2008; 3:e3050. [PMID: 18725957 PMCID: PMC2516176 DOI: 10.1371/journal.pone.0003050] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Accepted: 07/31/2008] [Indexed: 02/07/2023] Open
Abstract
Previously we have demonstrated that bradykinin B1 receptor deficient mice (B1KO) were protected against renal ischemia and reperfusion injury (IRI). Here, we aimed to analyze the effect of B1 antagonism on renal IRI and to study whether B1R knockout or antagonism could modulate the renal expression of pro and anti-inflammatory molecules. To this end, mice were subjected to 45 minutes ischemia and reperfused at 4, 24, 48 and 120 hours. Wild-type mice were treated intra-peritoneally with antagonists of either B1 (R-954, 200 µg/kg) or B2 receptor (HOE140, 200 µg/kg) 30 minutes prior to ischemia. Blood samples were collected to ascertain serum creatinine level, and kidneys were harvested for gene transcript analyses by real-time PCR. Herein, B1R antagonism (R-954) was able to decrease serum creatinine levels, whereas B2R antagonism had no effect. The protection seen under B1R deletion or antagonism was associated with an increased expression of GATA-3, IL-4 and IL-10 and a decreased T-bet and IL-1β transcription. Moreover, treatment with R-954 resulted in lower MCP-1, and higher HO-1 expression. Our results demonstrated that bradykinin B1R antagonism is beneficial in renal IRI.
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Affiliation(s)
- Pamella H. M. Wang
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
- * E-mail:
| | - Gabriela Campanholle
- Laboratório de Imunobiologia de Transplantes, Department of Immunology, Universidade de São Paulo, São Paulo, Brazil
| | - Marcos A. Cenedeze
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Carla Q. Feitoza
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Giselle M. Gonçalves
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Richardt G. Landgraf
- Laboratório de Imunofarmacologia, Department of Immunology, Universidade de São Paulo, São Paulo, Brazil
| | - Sonia Jancar
- Laboratório de Imunofarmacologia, Department of Immunology, Universidade de São Paulo, São Paulo, Brazil
| | - João B. Pesquero
- Department of Biophysics, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Alvaro Pacheco-Silva
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Niels O. S. Câmara
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
- Laboratório de Imunobiologia de Transplantes, Department of Immunology, Universidade de São Paulo, São Paulo, Brazil
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Feitoza CQ, Gonçalves GM, Semedo P, Cenedeze MA, Pinheiro HS, Beraldo FC, dos Santos OFP, Teixeira VDPA, dos Reis MA, Mazzali M, Pacheco-Silva A, Câmara NOS. Inhibition of COX 1 and 2 prior to renal ischemia/reperfusion injury decreases the development of fibrosis. Mol Med 2008; 14:724-30. [PMID: 18769637 DOI: 10.2119/2008-00064.feitoza] [Citation(s) in RCA: 45] [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] [Received: 05/26/2008] [Accepted: 08/18/2008] [Indexed: 01/05/2023] Open
Abstract
Ischemia and reperfusion injury (IRI) contributes to the development of chronic interstitial fibrosis/tubular atrophy in renal allograft patients. Cyclooxygenase (COX) 1 and 2 actively participate in acute ischemic injury by activating endothelial cells and inducing oxidative stress. Furthermore, blockade of COX 1 and 2 has been associated with organ improvement after ischemic damage. The aim of this study was to evaluate the role of COX 1 and 2 in the development of fibrosis by performing a COX 1 and 2 blockade immediately before IRI. We subjected C57Bl/6 male mice to 60 min of unilateral renal pedicle occlusion. Prior to surgery mice were either treated with indomethacin (IMT) at days -1 and 0 or were untreated. Blood and kidney samples were collected 6 wks after IRI. Kidney samples were analyzed by real-time reverse transcription-polymerase chain reaction for expression of transforming growth factor beta (TGF-beta), monocyte chemoattractant protein 1 (MCP-1), osteopontin (OPN), tumor necrosis factor alpha (TNF-alpha), interleukin (IL)-1 beta, IL-10, heme oxygenase 1 (HO-1), vimentin, connective-tissue growth factor (CTGF), collagen I, and bone morphogenic protein 7 (BMP-7). To assess tissue fibrosis we performed morphometric analyses and Sirius red staining. We also performed immunohistochemical analysis of anti-actin smooth muscle. Renal function did not significantly differ between groups. Animals pretreated with IMT showed significantly less interstitial fibrosis than nontreated animals. Gene transcript analyses showed decreased expression of TGF-beta, MCP-1, TNF-alpha, IL-1-beta, vimentin, collagen I, CTGF, and IL-10 mRNA (all P < 0.05). Moreover, HO-1 mRNA was increased in animals pretreated with IMT (P < 0.05). Conversely, IMT treatment decreased osteopontin expression and enhanced BMP-7 expression, although these levels did not reach statistical significance when compared with control expression levels. The blockade of COX 1 and 2 resulted in less tissue fibrosis, which was associated with a decrease in proinflammatory cytokines and enhancement of the protective cellular response.
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Affiliation(s)
- Carla Q Feitoza
- Laboratory of Experimental and Clinical Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
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17
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Ozaki KS, Marques GM, Nogueira E, Feitoza RQ, Cenedeze MA, Franco MF, Mazzali M, Soares MP, Pacheco-Silva A, Câmara NOS. Improved renal function after kidney transplantation is associated with heme oxygenase-1 polymorphism. Clin Transplant 2008; 22:609-16. [PMID: 18459998 DOI: 10.1111/j.1399-0012.2008.00832.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Heme oxygenase-1 (HO-1) has a microsatellite polymorphism based on the number of guanosine-thymidine nucleotide repeats (GT) repeats that regulates expression levels and could have an impact on organ survival post-injury. We correlated HO-1 polymorphism with renal graft function. The HO-1 gene was sequenced (N = 181), and the allelic repeats were divided into subclasses: short repeats (S) (<27 repeats) and long repeats (L) (>/=27 repeats). A total of 47.5% of the donors carried the S allele. The allograft function was statistically improved six months, two and three yr after transplantation in patients receiving kidneys from donors with an S allele. For the recipients carrying the S allele (50.3%), the allograft function was also better throughout the follow-up, but reached statistical significance only three yr after transplantation (p = 0.04). Considering only those patients who had chronic allograft nephropathy (CAN; 74 of 181), allograft function was also better in donors and in recipients carrying the S allele, two and three yr after transplantation (p = 0.03). Recipients of kidney transplantation from donors carrying the S allele presented better function even in the presence of CAN.
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Affiliation(s)
- K S Ozaki
- Nephrology Division, Universidade Federal de Säo Paulo, Brazil
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18
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Renesto PG, Ponciano VC, Cenedeze MA, Saraiva Câmara NO, Pacheco-Silva A. High expression of Tim-3 mRNA in urinary cells from kidney transplant recipients with acute rejection. Am J Transplant 2007; 7:1661-5. [PMID: 17430399 DOI: 10.1111/j.1600-6143.2007.01795.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [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: 02/07/2023]
Abstract
TIM-3 is a recently described molecule specifically expressed on Th1 differentiated T cells. We explored the usefulness of urinary mRNA profiles in the diagnosis of renal acute rejection (AR). Sixty urinary samples from renal transplant recipients simultaneously collected to allograft biopsy, (AR = 30 and No-AR =30), and 12 urinary samples from stable renal transplants were analyzed. Urinary mRNA encoding for TIM-3 and IFN-gamma were quantified using real time RT-PCR. TIM-3 mRNA was highly expressed in AR (559.19 +/- 644.41) compared to No-AR (3.78 +/- 7.20), and stable transplants (0.54 +/- 0.76), p < 0.001. To a lesser degree, IFN-gamma mRNA transcripts were also increased in AR (50.40 +/- 38.71), compared with No-AR (4.69 +/- 12.62), and stable transplants (0.38 +/- 0.44) p < 0.001. The highest expression of TIM-3 in AR makes it a promising noninvasive test for its diagnosis.
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Affiliation(s)
- P G Renesto
- Laboratory of Clinical and Experimental Immunology, Division of Nephrology, Universidade Federal de São Paulo, São Paulo, Brazil
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19
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Feitoza CQ, Gonçalves GM, Bertocchi APF, Wang PW, Damião MJ, Cenedeze MA, Teixeira VPA, Dos Reis MA, Pacheco-Silva A, Câmara NOS. A role for HO-1 in renal function impairment in animals subjected to ischemic and reperfusion injury and treated with immunosuppressive drugs. Transplant Proc 2007; 39:424-6. [PMID: 17362747 DOI: 10.1016/j.transproceed.2007.01.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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: 11/28/2022]
Abstract
INTRODUCTION Ischemia/reperfusion injury (IRI) represents the single major antigen-independent factor implicated in pathogenesis of chronic graft dysfunction. Tacrolimus is a calcineurin inhibitor, which has been suggested to be helpful in cyclosporine-related chronic toxicity. Rapamycin has antiproliferative properties that may impair renal regeneration after IRI. Therefore, immunosuppressive drugs might impair renal graft outcome in those organs suffering IRI. MATERIAL AND METHODS C57B1/6 male mice subjected to 45 minutes of renal pedicle ligation were reperfused for 24 hours. Mice were treated with rapamycin, cyclosporine, or tacrolimus. Blood and renal tissue samples were collected at 24 hours after IRI. Urea levels were measured. Heme Oxygenase 1 (HO-1) gene transcript was amplified by a real-time polymerase chain reaction technique. RESULTS Animals treated with cyclosporine and subjected to IRI showed impaired renal function that peaked at 24 hours. Additional pretreatment with rapamycin produced even more impairment of renal function, when compared with controls. However, tacrolimus pretreatment was associated with a better renal outcome. HO-1 expression was upregulated after IRI by 2.6 arbitrary units at 24 hours. Rapamycin showed worse impairment of renal function. CONCLUSION Tacrolimus was not associated with worsening renal function when compared with animals just subjected to IRI. Upregulation of HO-1 may be an attractive approach to limit graft injury.
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Affiliation(s)
- C Q Feitoza
- Laboratory of Experimental and Clinical Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
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Cenedeze MA, Gonçalves GM, Feitoza CQ, Wang PMH, Damião MJ, Bertocchi APF, Pacheco-Silva A, Câmara NOS. The role of toll-like receptor 4 in cisplatin-induced renal injury. Transplant Proc 2007; 39:409-11. [PMID: 17362743 DOI: 10.1016/j.transproceed.2007.01.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [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: 11/16/2022]
Abstract
BACKGROUND Toll-like receptors recognize pattern-associated molecules found in pathogens as well as in endogen cells and in matrix degradation products. Despite the effectiveness of cisplatin against various solid tumors the administered dose is limited by its nephrotoxicity, namely, induction of tubular cell apoptosis. Herein, we investigated whether the cell toxicity of cisplatin was mediated by toll-like receptor 4 signaling. METHODS C3H/He J (Toll-like receptor 4 deficient) and C3H/HePas (control) were treated with cisplatin (20 mg/kg). We evaluated renal function as well as expression of (HO-1) heme oxygenase 1 and MCP-1 mRNAs. RESULTS Animals deficient in Toll-like receptor 4 showed less renal dysfunction after cisplatin therapy, which was more evident at later time points. Moreover, MCP-1 mRNA expression in kidneys from these animals were lower than controls, mainly at 96 hours after treatment. No differences were seen in HO-1 mRNA expression. CONCLUSIONS These results suggested that cisplatin-induced renal toxicity is mediated in part though toll-like receptor 4.
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Affiliation(s)
- M A Cenedeze
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, Escola Paulista de Medicina, Universidade de São Paulo, São Paulo, Brazil
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Semedo P, Wang PM, Andreucci TH, Cenedeze MA, Teixeira VPA, Reis MA, Pacheco-Silva A, Câmara NOS. Mesenchymal stem cells ameliorate tissue damages triggered by renal ischemia and reperfusion injury. Transplant Proc 2007; 39:421-3. [PMID: 17362746 DOI: 10.1016/j.transproceed.2007.01.036] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Ischemia and reperfusion injury (I/R) is the major cause of acute renal failure (ARF) with high mortality rates. Because alternative therapies are needed, we investigated the use of stem cell therapy to modulate inflammation in a renal I/R model. METHODS To study kidney I/R injury, we clamped bilateral pedicles for 60 minutes. Mesenchymal stem cells (MSC), which had been isolated and cultivated in plastic flasks, were administered to mice 6 hours after injury. Real-time polymerase chain reaction was used to quantify interleukin (IL)-4 and IL-1beta mRNAs. Proliferative nuclear cell antigen (PCNA) was used to calculate tubular regeneration. RESULTS Administration of MSC attenuated renal injury; serum creatinine and plasma urea levels were significantly reduced 24 hours after reperfusion. PCNA immunohistochemistry showed that regeneration occurred faster in renal tissues of animals that received MSC than in tissues of control animals. Analyses of cytokine expression in renal tissue demonstrated a greater level of anti-inflammatory cytokines in MSC-treated animals. CONCLUSION These results showed an antiinflammatory pattern in MSC-treated animals, demonstrating the potential of MSC to modulate I/R, leading to earlier regeneration of damaged renal tissue.
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Affiliation(s)
- P Semedo
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, Brazil
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Gloria MA, Cenedeze MA, Pacheco-Silva A, Câmara NOS. The blockade of cyclooxygenases-1 and -2 reduces the effects of hypoxia on endothelial cells. Braz J Med Biol Res 2007; 39:1189-96. [PMID: 16981046 DOI: 10.1590/s0100-879x2006000900006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2005] [Accepted: 05/31/2006] [Indexed: 11/21/2022] Open
Abstract
Hypoxia activates endothelial cells by the action of reactive oxygen species generated in part by cyclooxygenases (COX) production enhancing leukocyte transmigration. We investigated the effect of specific COX inhibition on the function of endothelial cells exposed to hypoxia. Mouse immortalized endothelial cells were subjected to 30 min of oxygen deprivation by gas exchange. Acridine orange/ethidium bromide dyes and lactate dehydrogenase activity were used to monitor cell viability. The mRNA of COX-1 and -2 was amplified and semi-quantified before and after hypoxia in cells treated or not with indomethacin, a non-selective COX inhibitor. Expression of RANTES (regulated upon activation, normal T cell expressed and secreted) protein and the protective role of heme oxygenase-1 (HO-1) were also investigated by PCR. Gas exchange decreased partial oxygen pressure (PaO2) by 45.12 +/- 5.85% (from 162 +/- 10 to 73 +/- 7.4 mmHg). Thirty minutes of hypoxia decreased cell viability and enhanced lactate dehydrogenase levels compared to control (73.1 +/- 2.7 vs 91.2 +/- 0.9%, P < 0.02; 35.96 +/- 11.64 vs 22.19 +/- 9.65%, P = 0.002, respectively). COX-2 and HO-1 mRNA were up-regulated after hypoxia. Indomethacin (300 microM) decreased COX-2, HO-1, hypoxia-inducible factor-1alpha and RANTES mRNA and increased cell viability after hypoxia. We conclude that blockade of COX up-regulation can ameliorate endothelial injury, resulting in reduced production of chemokines.
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Affiliation(s)
- M A Gloria
- Laboratório de Imunologia Clínica e Experimental, Divisão de Nefrologia, Universidade Federal de São Paulo, Hospital do Rim e Hipertensão, Fundação Oswaldo Ramos, São Paulo, SP, Brasil
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23
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Naka EL, Ponciano VC, Rangel EB, Cenedeze MA, Pacheco-Silva A, Camara NOS. FOXP3-positive regulatory cells inside the allograft and the correlation with rejection. Transplant Proc 2007; 38:3202-4. [PMID: 17175222 DOI: 10.1016/j.transproceed.2006.10.123] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Indexed: 01/22/2023]
Abstract
BACKGROUND Foxp3 is a transcription factor associated with regulatory T cells. Little is known about the role of Foxp3+ regulatory T cells in relation to graft rejection in humans. METHODS By using a quantitative polymerase chain reaction assay, we measured the levels of messenger RNA (mRNA) for Foxp3 in 27 samples obtained at allograft nephrectomy for acute nonvascular rejection (ANVR; n = 7), or acute vascular rejection (AVR; n = 15), or loss due to a nonimmune cause (LNIC; n = 5, as control). Granzyme B was also analyzed as a positive control for the host-driven immune response. RESULTS Median Foxp3 mRNA levels correlated with the severity of rejection: LNIC 1.000, ANVR 1.429, and AVR 3.904 (P = .022 for LNIC and AVR by the Kruskal-Wallis test). The receiver operating characteristic curve for AVR demonstrated an area under the curve of 0.733 (P = .04; 95% CI, 0.528-0.939). The levels of granzyme B mRNA also showed the same profile but did not reach statistical significance. CONCLUSIONS The presence of mRNA for Foxp3 inside the graft suggested specific homing during severe episodes of acute rejection. Its presence may indicate the development of host immunoregulatory responses during the ongoing cytolytic activity. In addition, assessment of Foxp3 mRNA inside the graft may distinguish vascular from nonvascular rejection.
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Affiliation(s)
- E L Naka
- Department of Immunology, University of São Paulo, São Paulo, Brazil
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24
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Ponciano VC, Renesto PG, Nogueira E, Rangel EB, Cenedeze MA, Franco MF, Câmara NOS, Pacheco-Silva A. Tim-3 expression in human kidney allografts. Transpl Immunol 2007; 17:215-22. [PMID: 17331850 DOI: 10.1016/j.trim.2006.11.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2006] [Revised: 11/02/2006] [Accepted: 11/09/2006] [Indexed: 11/19/2022]
Abstract
BACKGROUND Tim-3 was recently described as a Th1-specific molecule, participating in the regulation of immune responses and in the induction of allograft tolerance. Here, we studied Tim-3 mRNA expression together with molecular markers of T-cell activation and cytotoxicity, in rejected human kidney grafts. METHODS Twenty human kidney grafts that had undergone nephrectomy due to an irreversible acute rejection episode were studied. We quantified intragraft expression of Tim-3, granzyme B, perforin, IFN-gamma and Fas-ligand mRNA by real-time RT-PCR, with probes and primers TaqMan. Protocol biopsies were studied as controls. Statistical analyses were performed to compare groups, and to investigate the potential association with gene transcripts measures and rejection. RESULTS All molecules studied were up-regulated in the rejection group compared with controls (p<0.001). Acute rejection type III (Banff 97) profiles were associated with higher values, where granzyme B and perforin presented the highest (5672.51+/-9002.16 and 1866.59+/-2426.38, respectively) and Tim-3 had the lowest ones (166.62+/-174.94). Tim-3 had also a lower expression in those patients that did not respond to anti-rejection therapy. There was a positive correlation between Tim-3 and IFN-gamma mRNA expression levels (r(2)=0.73; p<0.001). CONCLUSIONS Our results corroborate the concept that acute rejection is an active process, where inflammatory as well as regulatory factors have their roles. Severe episodes of acute rejection were associated with higher expression of cytotoxic molecules and lower expression of potential regulatory molecule.
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Affiliation(s)
- Viviane C Ponciano
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Universidade Federal de São Paulo, Rua Botucatu 740, Vila Clementino, 04023-900, São Paulo, SP, Brazil
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25
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Damião MJ, Bertocchi APF, Monteiro RMM, Gonçalves GM, Cenedeze MA, Feitoza CQ, Marques GD, Giannocco G, Mazzali M, Teixeira VPA, Dos Reis MA, Pacheco-Silva A, Câmara NOS. The Effects of Rapamycin in the Progression of Renal Fibrosis. Transplant Proc 2007; 39:457-9. [PMID: 17362758 DOI: 10.1016/j.transproceed.2007.01.031] [Citation(s) in RCA: 13] [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: 11/16/2022]
Abstract
UNLABELLED Renal fibrosis is a hallmark of end-stage renal diseases and of chronic allograft nephropathy (CAN). Rapamycin, besides its action through blockade of lymphocyte proliferation, also has antiproliferative, antiviral, and antitumor actions. Its use in clinical in patients with CAN has recently been advocated. OBJECTIVES Our goal was to evaluate the effect of rapamycin in an established model of renal fibrosis, unilateral ureteral obstruction. MATERIALS AND METHODS C57BL/6 mice were divided into two groups, treated or not with daily doses of rapamycin (0.2 mg/kg) beginning on day-1. The obstruction was performed as day 0. Blood and kidney tissues were collected at 1, 4, 7, and 14 days after the surgery to quantify bone morphogenic protein (BMP)-7 and transforming growth factor (TGF)-beta mRNA by real time PCR. RESULTS Daily treatment with rapamycin caused a significant reduction in serum creatinine at day 1 (0.57 +/- 0.03 vs 0.95 +/- 0.15 mg/dL, P = .002) and at day 14 (0.56 +/- 0.04 vs 0.73 +/- 0.07 mg/dL, P = .040). This profile was corroborated by histological morphometric analyses showing less fibrosis at day 14. However, rapamycin surprisingly induced an upregulation of TGF-beta at day 4 (3.05 +/- 0.46 vs 1.85 +/- 0.41, P = .006) and at day 7 (6.33 +/- 0.55 vs 4.97 +/- 0.38, P = .024) with a reduced expression by day 14 (4.03 +/- 1.07 vs 7.89 +/- 0.83, P < .001). Surprisingly, rapamycin also promoted an increment in BMP-7, completely reversing the ratio of TGF-beta to BMP-7, allowing a more protective phenotype. CONCLUSION Rapamycin slightly ameliorated the renal dysfunction and, at later time points, induced less fibrosis and less decrease in the TGF-beta to BMP-7 ratio.
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Affiliation(s)
- M J Damião
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Universidade Federal de São Paulo, Hospital do Rim e Hipertensão/Fundação Oswaldo Ramos, Brazil
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26
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Gonçalves GM, Cenedeze MA, Feitoza CQ, de Paula CB, Marques GD, Pinheiro HS, de Paula Antunes Teixeira V, Antônia dos Reis M, Pacheco-Silva A, Câmara NOS. The Role of Immunosuppressive Drugs in Aggravating Renal Ischemia and Reperfusion Injury. Transplant Proc 2007; 39:417-20. [PMID: 17362745 DOI: 10.1016/j.transproceed.2007.01.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [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: 12/23/2022]
Abstract
UNLABELLED Renal ischemia followed by reperfusion leads to acute renal failure in both native kidneys and renal allografts. Cyclosporine has known nephrotoxic effects. Thus, cyclosporine therapy subsequent to ischemia/reperfusion (I/R) injury may further exacerbate graft dysfunction. Rapamycin is a newer agent that suppresses the immune system by a different mechanism. In the present study, the effects of Cyclosporine and rapamycin at low and higher concentrations were investigated in an I/R-induced injury model. METHODS Cyclosporine (100 mg/kg or 50 mg/kg), rapamycin (3 mg/kg per day or 1.5 mg/kg), or both were administered to mice before being subjected to 45 minutes of ischemia. Blood and kidney samples were collected at 24, 48, and 120 hours after surgery. We quantified acute tubular necrosis and tubular regeneration. RESULTS Animals subjected to I/R showed impaired renal function that peaked at 24 hours (2.05 +/- 0.23 mg/dL), decreasing thereafter. Treatment with higher concentrations of cyclosporine or rapamycin caused even more renal dysfunction at 48 hours, which was sustained up to 120 hours after reperfusion (1.53 +/- 0.6 mg/dL), when compared to the low concentrations of cyclosporine or rapamycin (1.08 +/- 0.19 mg/dL; 0.99 +/- 0.14 mg/dL, P < .05, respectively). Cyclosporine delayed tubular regeneration, which was higher in controls at day 5 (67.0% vs 37.6%, P < .05). CONCLUSIONS These results demonstrated that cyclosporine or rapamycin might further aggravate ischemically injured organs, negatively affecting posttransplantation recovery in a concentration-dependent fashion.
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Affiliation(s)
- G M Gonçalves
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, Brazil
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27
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Campanholle G, Galvão-Pereira M, Cenedeze MA, de Paula A Teixeira V, dos Reis MA, Camara NOS, Pacheco-Silva A. Dual response of animals with chronic cyclosporine nephrotoxicity to an acute ischemic injury. Transplant Proc 2006; 38:3341-3. [PMID: 17175267 DOI: 10.1016/j.transproceed.2006.10.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2006] [Indexed: 11/20/2022]
Abstract
Normal kidneys regenerate after acute injury with little development of chronic fibrosis. However, the long-term effects of an acute injury in kidneys with established chronic toxicity induced by cyclosporine (CsA) are not entirely clear. To study the consequences of an ischemia and reperfusion (IR) injury in long-term CsA-treated rats, male Wistar rats (250-300 g) were treated daily with CsA (10 mg/kg) or vehicle (olive oil 1 mL/kg) for 28 days. On day 21, ischemia was performed by clamping the renal vessel for 1 hour. Blood samples were collected on days 0 and 21 (before IR) as well as days 22 and 28. On day 28, the kidneys were collected to examine the mRNA expression of MCP-1 by real-time PCR. For renal function, serum creatinine levels were measured. Twenty-four hours after reperfusion, long-term CsA-treated animals showed better renal function compared with the control group, as demonstrated by serum creatinine levels: 2.2 +/- 0.13 mg/dL vs 2.9 +/- 0.18 mg/dL, respectively (P < .05). However, 1 week after IR, the renal function was worse among the long-term CsA-treated group than the controls: 1.16 +/- 0.08 mg/dL vs 0.8 +/- 0.09 mg/dL, respectively (P < .05). Interestingly, CsA treatment was associated with lower MCP-1 mRNA expression than that in the control group: mean MCP-1 mRNA expression 0.58 +/- 0.13 vs 1.02 +/- 0.12, respectively (P < .05). In conclusion, animals with chronic CsA nephrotoxicity were protected from an acute renal injury, possibly through decreased chemokine production, although at later time points, renal function was clearly impaired, probably by the acceleration of vasculopathy caused by nephrotoxicity.
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Affiliation(s)
- G Campanholle
- Division of Nephrology, Federal University of São Paulo, São Paulo, Brazil
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28
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Gonçalves GM, Cenedeze MA, Feitoza CQ, Wang PMH, Bertocchi APF, Damião MJ, Pinheiro HS, Antunes Teixeira VP, dos Reis MA, Pacheco-Silva A, Câmara NOS. The role of heme oxygenase 1 in rapamycin-induced renal dysfunction after ischemia and reperfusion injury. Kidney Int 2006; 70:1742-9. [PMID: 17003813 DOI: 10.1038/sj.ki.5001893] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [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: 01/08/2023]
Abstract
Ischemia and reperfusion injury (IRI) is the main etiology of acute renal failure in native and transplanted kidneys. In the transplantation field, immunosuppressive drugs may play an additional role in acute graft dysfunction. Rapamycin may impair renal regeneration post IRI. Heme oxygenase 1 (HO-1) is a protective gene with anti-inflammatory and anti-apoptotic actions. We investigated whether HO-1 played a role in rapamycin-induced renal dysfunction in an established model of IRI. Rapamycin (3 mg/kg) was administered to mice before being subjected to 45 min of ischemia. Animals subjected to IRI presented with impaired renal function that peaked at 24 h (2.05+/-0.23 mg/dl), decreasing thereafter. Treatment with rapamycin caused even more renal dysfunctions (2.30+/-0.33 mg/dl), sustained up to 120 h after reperfusion (1.54+/-0.4 mg/dl), when compared to the control (0.63+/-0.09 mg/dl, P<0.05). Rapamycin delayed tubular regeneration that was normally higher in the control group at day 5 (68.53+/-2.30 vs 43.63+/-3.11%, P<0.05). HO-1 was markedly upregulated after IRI and its expression was even enhanced by rapamycin (1.32-fold). However, prior induction of HO-1 by cobalt protoporphyrin improved the renal dysfunction imposed by rapamycin, mostly at later time points. These results demonstrated that rapamycin used in ischemic-injured organs could also negatively affect post-transplantation recovery. Modulation of HO-1 expression may represent a feasible approach to limit rapamycin acute toxicity.
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Affiliation(s)
- G M Gonçalves
- Laboratório de Imunologia Clínica e Experimental, Division of Nephrology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, Brazil
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29
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Cedenho AP, Lima SB, Cenedeze MA, Spaine DM, Ortiz V, Oehninger S. Oligozoospermia and heat-shock protein expression in ejaculated spermatozoa. Hum Reprod 2006; 21:1791-4. [PMID: 16517558 DOI: 10.1093/humrep/del055] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [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: 11/12/2022] Open
Abstract
BACKGROUND Heat-shock protein A2 (HspA2) is correlated with sperm maturity, function and fertility, and a dysfunctional expression of such a gene results in abnormal spermatogenesis. The purpose of this study was to compare HspA2 gene expression in spermatozoa from oligozoospermic men and normozoospermic controls. METHODS Semen was obtained and analysed according to World Health Organization (World Health Organization, 1999) guidelines, morphology by Kruger's strict criteria. Seventeen patients with oligozoospermia and 21 fertile controls were studied. Total RNA was extracted from ejaculated and Percoll density-gradient-separated spermatozoa followed by semiquantitative RT-PCR analysis. The relative expression level of HspA2 was analysed according to the expression level of the housekeeping beta-actin gene. Serum hormonal profiles (FSH, LH and testosterone) and a peripheral karyotype were also performed. RESULTS All patients possessed normal karyotype, and no significant hormonal differences were found between the two groups. The study group had significantly lower sperm concentration and normal morphology than the controls. Semiquantitative RT-PCR analysis of HspA2 showed significantly lower expression levels in the oligoteratozoospermic men when compared to controls (P=0.0021). CONCLUSIONS The HspA2 gene was down-regulated in sperm from infertile men with idiopathic oligoteratozoospermia, suggesting that such anomalies of gene expression might be associated with pathogenesis in some subtypes of male infertility.
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Affiliation(s)
- A P Cedenho
- Department of Surgery, Division of Urology, São Paulo Federal University, Brazil
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30
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Feitoza CQ, Câmara NOS, Pinheiro HS, Gonçalves GM, Cenedeze MA, Pacheco-Silva A, Santos OFP. Cyclooxygenase 1 and/or 2 blockade ameliorates the renal tissue damage triggered by ischemia and reperfusion injury. Int Immunopharmacol 2005; 5:79-84. [PMID: 15589463 DOI: 10.1016/j.intimp.2004.09.024] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [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: 11/24/2022]
Abstract
Ischemia-reperfusion injury (IRI) is a common event in organ transplantation, being implicated as a potential contributor for the development of chronic allograft nephropathy. There are new evidences showing a tissue inflammatory response following renal IRI. Cyclooxygenases (COX) 1 and 2 can be detected in tissue submitted to IRI and may have impact on organ function outcome. We evaluated the role of COX inhibition on the renal tissue damage that follows IRI. Mice were submitted to 45 min of renal pedicle ligature and allowed to reperfuse for 24, 48, 72 and 120 h. Blood and kidney samples were collected at reperfusion times. mRNA was extracted from the kidney samples to amplify COX-1, COX-2 and beta-actin genes. Animals were pretreated with indomethacin or rofecoxib before the surgery. Indomethacin treatment induced a better renal function (serum urea) when compared to control animals at 24, 48 and 72 h (219+/-54.5 vs. 338+/-51 mg/dl; 106+/-51 vs. 326+/-86 mg/dl; 94+/-14 vs. 138+/-38 mg/dl, respectively). Surprisingly, rofecoxib use was associated with even better renal improvement following IR. Animals treated with the later drug showed lower urea values at 24 h post reperfusion compared to indomethacin-treated animals (128+/-33 vs. 219+/-54.5 mg/dl, P<0.05). Blockade of COX-1 and -2 resulted in a decrease of tubular necrosis. mRNA COX-2 was up-regulated post IRI and considerable inhibited after indomethacin or rofecoxib treatment. Our data show COX-1/-2 participates in the inflammatory tissue response to IR injury and its inhibition is associated with an improvement in renal function.
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Affiliation(s)
- Carla Q Feitoza
- Laboratory of Clinical and Experimental Immunology, Departamento de Medicina, Disciplina de Nefrologia, Hospital do Rim e Hipertensão, Universidade Federal de São Paulo, Rua Botucatu 740, Vila Clementino, 04023-900, São Paulo, Brazil
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