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Barreto EA, Cruz AS, Veras FP, Martins R, Bernardelli RS, Paiva IM, Lima TM, Singh Y, Guimarães RC, Damasceno S, Pereira N, Alves JM, Gonçalves TT, Forato J, Muraro SP, Souza GF, Batah SS, Proenca-Modena JL, Mori MA, Cunha FQ, Louzada-Junior P, Cunha TM, Nakaya HI, Fabro A, de Oliveira RDR, Arruda E, Réa R, Réa Neto Á, Fernandes da Silva MM, Leiria LO. COVID-19-related hyperglycemia is associated with infection of hepatocytes and stimulation of gluconeogenesis. Proc Natl Acad Sci U S A 2023; 120:e2217119120. [PMID: 37186819 PMCID: PMC10214153 DOI: 10.1073/pnas.2217119120] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 04/19/2023] [Indexed: 05/17/2023] Open
Abstract
Occurrence of hyperglycemia upon infection is associated with worse clinical outcome in COVID-19 patients. However, it is still unknown whether SARS-CoV-2 directly triggers hyperglycemia. Herein, we interrogated whether and how SARS-CoV-2 causes hyperglycemia by infecting hepatocytes and increasing glucose production. We performed a retrospective cohort study including patients that were admitted at a hospital with suspicion of COVID-19. Clinical and laboratory data were collected from the chart records and daily blood glucose values were analyzed to test the hypothesis on whether COVID-19 was independently associated with hyperglycemia. Blood glucose was collected from a subgroup of nondiabetic patients to assess pancreatic hormones. Postmortem liver biopsies were collected to assess the presence of SARS-CoV-2 and its transporters in hepatocytes. In human hepatocytes, we studied the mechanistic bases of SARS-CoV-2 entrance and its gluconeogenic effect. SARS-CoV-2 infection was independently associated with hyperglycemia, regardless of diabetic history and beta cell function. We detected replicating viruses in human hepatocytes from postmortem liver biopsies and in primary hepatocytes. We found that SARS-CoV-2 variants infected human hepatocytes in vitro with different susceptibility. SARS-CoV-2 infection in hepatocytes yields the release of new infectious viral particles, though not causing cell damage. We showed that infected hepatocytes increase glucose production and this is associated with induction of PEPCK activity. Furthermore, our results demonstrate that SARS-CoV-2 entry in hepatocytes occurs partially through ACE2- and GRP78-dependent mechanisms. SARS-CoV-2 infects and replicates in hepatocytes and exerts a PEPCK-dependent gluconeogenic effect in these cells that potentially is a key cause of hyperglycemia in infected patients.
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Affiliation(s)
- Ester A. Barreto
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Amanda S. Cruz
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Flavio P. Veras
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Ronaldo Martins
- Department of Cell Biology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Rafaella S. Bernardelli
- Federal University of Paraná, Center for Study and Research in Intensive Care Medicine, Curitiba82530-200, Brazil
| | - Isadora M. Paiva
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Thais M. Lima
- Department of Pathology and Legal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Youvika Singh
- Hospital Israelita Albert Einstein, São Paulo05652-900, Brazil
| | - Raphael C. Guimarães
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, Campinas13083-970, Brazil
| | - Samara Damasceno
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Nayara Pereira
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - João Manoel Alves
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Tiago T. Gonçalves
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Julia Forato
- Department of Genetics, Microbiology and Immunology, Laboratory of Emerging Viruses, Institute of Biology, University of Campinas, Campinas13083-970, Brazil
| | - Stéfanie P. Muraro
- Department of Genetics, Microbiology and Immunology, Laboratory of Emerging Viruses, Institute of Biology, University of Campinas, Campinas13083-970, Brazil
| | - Gabriela F. Souza
- Department of Genetics, Microbiology and Immunology, Laboratory of Emerging Viruses, Institute of Biology, University of Campinas, Campinas13083-970, Brazil
| | - Sabrina Setembre Batah
- Department of Pathology and Legal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - José L. Proenca-Modena
- Department of Genetics, Microbiology and Immunology, Laboratory of Emerging Viruses, Institute of Biology, University of Campinas, Campinas13083-970, Brazil
- Experimental Medicine Research, Cluster University of Campinas, Campinas13083-970, Brazil
| | - Marcelo A. Mori
- Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, Campinas13083-970, Brazil
- Experimental Medicine Research, Cluster University of Campinas, Campinas13083-970, Brazil
- Obesity and Comorbidities Research Center, University of Campinas, Campinas13083-864, Brazil
| | - Fernando Q. Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Paulo Louzada-Junior
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Divisions of Clinical Immunology, Emergency, Infectious Diseases, and Intensive Care Unit, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Thiago M. Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Helder I. Nakaya
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Hospital Israelita Albert Einstein, São Paulo05652-900, Brazil
| | - Alexandre Fabro
- Department of Pathology and Legal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Renê D. R. de Oliveira
- Divisions of Clinical Immunology, Emergency, Infectious Diseases, and Intensive Care Unit, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Eurico Arruda
- Department of Cell Biology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
| | - Rosângela Réa
- Federal University of Paraná, Center for Study and Research in Intensive Care Medicine, Curitiba82530-200, Brazil
- Hospital de Clínicas da Universidade Federal do Paraná, Curitiba80060-900, Brazil
| | - Álvaro Réa Neto
- Federal University of Paraná, Center for Study and Research in Intensive Care Medicine, Curitiba82530-200, Brazil
- Hospital de Clínicas da Universidade Federal do Paraná, Curitiba80060-900, Brazil
| | | | - Luiz Osório Leiria
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
- Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto14049-900, Brazil
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2
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Miura CS, Lima TM, Martins RB, Jorge DM, Tamashiro E, Anselmo-Lima WT, Arruda E, Valera FC. Asymptomatic SARS-COV-2 infection in children's tonsils. Braz J Otorhinolaryngol 2022. [PMCID: PMC9582977 DOI: 10.1016/j.bjorl.2022.10.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Carolina S. Miura
- Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil,Corresponding author
| | - Thais M. Lima
- Departamento de Biologia Celular e Centro de Pesquisa em Virologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Ronaldo B. Martins
- Departamento de Biologia Celular e Centro de Pesquisa em Virologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Daniel M.M. Jorge
- Departamento de Biologia Celular e Centro de Pesquisa em Virologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Edwin Tamashiro
- Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Wilma T. Anselmo-Lima
- Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Eurico Arruda
- Departamento de Biologia Celular e Centro de Pesquisa em Virologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Fabiana C.P. Valera
- Departamento de Oftalmologia, Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
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3
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Fuzo CA, Martins RB, Fraga-Silva TFC, Amstalden MK, Canassa De Leo T, Souza JP, Lima TM, Faccioli LH, Okamoto DN, Juliano MA, França SC, Juliano L, Bonato VLD, Arruda E, Dias-Baruffi M. Celastrol: A lead compound that inhibits SARS-CoV-2 replication, the activity of viral and human cysteine proteases, and virus-induced IL-6 secretion. Drug Dev Res 2022; 83:1623-1640. [PMID: 35989498 PMCID: PMC9539158 DOI: 10.1002/ddr.21982] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/30/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022]
Abstract
The global emergence of coronavirus disease 2019 (COVID‐19) has caused substantial human casualties. Clinical manifestations of this disease vary from asymptomatic to lethal, and the symptomatic form can be associated with cytokine storm and hyperinflammation. In face of the urgent demand for effective drugs to treat COVID‐19, we have searched for candidate compounds using in silico approach followed by experimental validation. Here we identified celastrol, a pentacyclic triterpene isolated from Tripterygium wilfordii Hook F, as one of the best compounds out of 39 drug candidates. Celastrol reverted the gene expression signature from severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2)‐infected cells and irreversibly inhibited the recombinant forms of the viral and human cysteine proteases involved in virus invasion, such as Mpro (main protease), PLpro (papain‐like protease), and recombinant human cathepsin L. Celastrol suppressed SARS‐CoV‐2 replication in human and monkey cell lines and decreased interleukin‐6 (IL‐6) secretion in the SARS‐CoV‐2‐infected human cell line. Celastrol acted in a concentration‐dependent manner, with undetectable signs of cytotoxicity, and inhibited in vitro replication of the parental and SARS‐CoV‐2 variant. Therefore, celastrol is a promising lead compound to develop new drug candidates to face COVID‐19 due to its ability to suppress SARS‐CoV‐2 replication and IL‐6 production in infected cells.
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Affiliation(s)
- Carlos A Fuzo
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Ronaldo B Martins
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Thais F C Fraga-Silva
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Martin K Amstalden
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Thais Canassa De Leo
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Juliano P Souza
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Thais M Lima
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Lucia H Faccioli
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Débora Noma Okamoto
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Maria Aparecida Juliano
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Suzelei C França
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil
| | - Luiz Juliano
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Vania L D Bonato
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Eurico Arruda
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Marcelo Dias-Baruffi
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
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4
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Salina ACG, Dos Santos D, Rodrigues TS, Fortes-Rocha M, Freitas-Filho EG, Alzamora-Terrel DL, Castro IMS, Fraga-Silva TF, de Lima MHF, Nascimento DC, Silva CM, Toller-Kawahisa JE, Becerra A, Oliveira S, Caetite DB, Almeida L, Ishimoto AY, Lima TM, Martins RB, Veras FP, do Amaral NB, Giannini MC, Bonjorno LP, Lopes MIF, Benatti MN, Batah SS, Santana RC, Vilar FC, Martins MA, Assad RL, deAlmeida SCL, de Oliveira FR, Arruda Neto E, Cunha TM, Alves-Filho JC, Bonato VLD, Cunha FQ, Fabro AT, Nakaya HI, Zamboni DS, Louzada-Junior P, de Oliveira RDR, Cunha LD. Efferocytosis of SARS-CoV-2-infected dying cells impairs macrophage anti-inflammatory functions and clearance of apoptotic cells. eLife 2022; 11:74443. [PMID: 35666101 PMCID: PMC9262386 DOI: 10.7554/elife.74443] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 05/25/2022] [Indexed: 11/25/2022] Open
Abstract
COVID-19 is a disease of dysfunctional immune responses, but the mechanisms triggering immunopathogenesis are not established. The functional plasticity of macrophages allows this cell type to promote pathogen elimination and inflammation or suppress inflammation and promote tissue remodeling and injury repair. During an infection, the clearance of dead and dying cells, a process named efferocytosis, can modulate the interplay between these contrasting functions. Here, we show that engulfment of SARS-CoV-2-infected apoptotic cells exacerbates inflammatory cytokine production, inhibits the expression of efferocytic receptors, and impairs continual efferocytosis by macrophages. We also provide evidence supporting that lung monocytes and macrophages from severe COVID-19 patients have compromised efferocytic capacity. Our findings reveal that dysfunctional efferocytosis of SARS-CoV-2-infected cell corpses suppresses macrophage anti-inflammation and efficient tissue repair programs and provides mechanistic insights for the excessive production of pro-inflammatory cytokines and accumulation of tissue damage associated with COVID-19 immunopathogenesis.
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Affiliation(s)
- Ana Carolina G Salina
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Douglas Dos Santos
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Tamara S Rodrigues
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Marlon Fortes-Rocha
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Edismauro G Freitas-Filho
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Daniel L Alzamora-Terrel
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Icaro M S Castro
- Department of Clinical and Toxicological Analysis, University of Sao Paulo, Ribeirão Preto, Brazil
| | | | | | | | - Camila M Silva
- Department of Pharmacology, University of Sao Paulo, Ribeirão Preto, Brazil
| | | | - Amanda Becerra
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Samuel Oliveira
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Diego B Caetite
- Department of Pharmacology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Leticia Almeida
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Adriene Y Ishimoto
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Thais M Lima
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Ronaldo B Martins
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Flavio P Veras
- Department of Pharmacology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Natália B do Amaral
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Marcela C Giannini
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Letícia P Bonjorno
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Maria Isabel F Lopes
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Maira N Benatti
- Department of Pathology and Forensic Medicine, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Sabrina S Batah
- Department of Pathology and Forensic Medicine, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Rodrigo C Santana
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Fernando C Vilar
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | | | - Rodrigo L Assad
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Sergio C L deAlmeida
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | | | - Eurico Arruda Neto
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Vania L D Bonato
- Department of Biochemistry and Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Alexandre T Fabro
- Department of Pathology and Forensic Medicine, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Helder I Nakaya
- Department of Clinical and Toxicological Analysis, University of São Paulo, São Paulo, Brazil
| | - Dario S Zamboni
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of São Paulo, Ribeirão Preto, Brazil
| | - Paulo Louzada-Junior
- Center of Research in Inflammatory Diseases, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Renê D R de Oliveira
- Division of Clinical Immunology, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Larissa D Cunha
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, University of Sao Paulo, Ribeirão Preto, Brazil
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5
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Pontelli MC, Castro IA, Martins RB, La Serra L, Veras FP, Nascimento DC, Silva CM, Cardoso RS, Rosales R, Gomes R, Lima TM, Souza JP, Vitti BC, Caetité DB, de Lima MHF, Stumpf SD, Thompson CE, Bloyet LM, Kawahisa JTE, Giannini MC, Bonjorno LP, Lopes MIF, Batah SS, Li S, Assad RL, Almeida SCL, Oliveira FR, Benatti MN, Pontes LLF, Santana RC, Vilar FC, Martins MA, Shi PY, Cunha TM, Calado RT, Alves-Filho JC, Zamboni DS, Fabro A, Louzada-Junior P, Oliveira RDR, Whelan SPJ, Cunha FQ, Arruda E. SARS-CoV-2 productively infects primary human immune system cells in vitro and in COVID-19 patients. J Mol Cell Biol 2022; 14:6572370. [PMID: 35451490 PMCID: PMC9384834 DOI: 10.1093/jmcb/mjac021] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 12/30/2021] [Accepted: 04/19/2022] [Indexed: 12/04/2022] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is associated with a hyperinflammatory state and lymphocytopenia, a hallmark that appears as both signature and prognosis of disease severity outcome. Although cytokine storm and a sustained inflammatory state are commonly associated with immune cell depletion, it is still unclear whether direct SARS-CoV-2 infection of immune cells could also play a role in this scenario by harboring viral replication. We found that monocytes, as well as both B and T lymphocytes, were susceptible to SARS-CoV-2 infection in vitro, accumulating double-stranded RNA consistent with viral RNA replication and ultimately leading to expressive T cell apoptosis. In addition, flow cytometry and immunofluorescence analysis revealed that SARS-CoV-2 was frequently detected in monocytes and B lymphocytes from coronavirus disease 2019 (COVID-19) patients. The rates of SARS-CoV-2-infected monocytes in peripheral blood mononuclear cells from COVID-19 patients increased over time from symptom onset, with SARS-CoV-2-positive monocytes, B cells, and CD4+ T lymphocytes also detected in postmortem lung tissue. These results indicated that SARS-CoV-2 infection of blood-circulating leukocytes in COVID-19 patients might have important implications for disease pathogenesis and progression, immune dysfunction, and virus spread within the host.
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Affiliation(s)
- Marjorie C Pontelli
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Italo A Castro
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Ronaldo B Martins
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Leonardo La Serra
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Flávio P Veras
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Daniele C Nascimento
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Camila M Silva
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Ricardo S Cardoso
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Roberta Rosales
- Department of Cell and Molecular Biology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Rogério Gomes
- Blood Center of Ribeirao Preto, 14049-900, Ribeirao Preto, São Paulo, Brazil
| | - Thais M Lima
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Juliano P Souza
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Brenda C Vitti
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Diego B Caetité
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Mikhael H F de Lima
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Spencer D Stumpf
- Department of Biochemistry & Molecular Biology, the University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Cassandra E Thompson
- Department of Biochemistry & Molecular Biology, the University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Louis-Marie Bloyet
- Department of Biochemistry & Molecular Biology, the University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Juliana T E Kawahisa
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Marcela C Giannini
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Letícia P Bonjorno
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Maria I F Lopes
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Sabrina S Batah
- Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Siyuan Li
- Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Rodrigo L Assad
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Sergio C L Almeida
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Fabiola R Oliveira
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Maíra N Benatti
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Lorena L F Pontes
- Blood Center of Ribeirao Preto, 14049-900, Ribeirao Preto, São Paulo, Brazil
| | - Rodrigo C Santana
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Fernando C Vilar
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Maria A Martins
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Pei-Yong Shi
- Department of Biochemistry & Molecular Biology, the University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Thiago M Cunha
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Rodrigo T Calado
- Blood Center of Ribeirao Preto, 14049-900, Ribeirao Preto, São Paulo, Brazil
| | - José C Alves-Filho
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Dario S Zamboni
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Department of Cell and Molecular Biology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Alexandre Fabro
- Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Paulo Louzada-Junior
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Rene D R Oliveira
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Divisions of Clinical Immunology, Infectious Diseases and Intensive Care Unit, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Sean P J Whelan
- Department of Molecular Microbiology, Washington University in St. Louis, Saint Louis, MO 63110, USA
| | - Fernando Q Cunha
- Center of Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
| | - Eurico Arruda
- Virology Research Center, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil.,Department of Cell and Molecular Biology, Ribeirao Preto Medical School, University of Sao Paulo, 14049-900, Ribeirao Preto, Sao Paulo, Brazil
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6
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Pontelli MC, Castro IA, Martins RB, Veras FP, Serra LL, Nascimento DC, Cardoso RS, Rosales R, Lima TM, Souza JP, Caetité DB, de Lima MHF, Kawahisa JT, Giannini MC, Bonjorno LP, Lopes MIF, Batah SS, Siyuan L, Assad RL, Almeida SCL, Oliveira FR, Benatti MN, Pontes LLF, Santana RC, Vilar FC, Martins MA, Cunha TM, Calado RT, Alves-Filho JC, Zamboni DS, Fabro A, Louzada-Junior P, Oliveira RDR, Cunha FQ, Arruda E. Infection of human lymphomononuclear cells by SARS-CoV-2. bioRxiv 2020. [PMID: 34013264 PMCID: PMC8132220 DOI: 10.1101/2020.07.28.225912] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although SARS-CoV-2 severe infection is associated with a hyperinflammatory state, lymphopenia is an immunological hallmark, and correlates with poor prognosis in COVID-19. However, it remains unknown if circulating human lymphocytes and monocytes are susceptible to SARS-CoV-2 infection. In this study, SARS-CoV-2 infection of human peripheral blood mononuclear cells (PBMCs) was investigated both in vitro and in vivo . We found that in vitro infection of whole PBMCs from healthy donors was productive of virus progeny. Results revealed that monocytes, as well as B and T lymphocytes, are susceptible to SARS-CoV-2 active infection and viral replication was indicated by detection of double-stranded RNA. Moreover, flow cytometry and immunofluorescence analysis revealed that SARS-CoV-2 was frequently detected in monocytes and B lymphocytes from COVID-19 patients, and less frequently in CD4 + T lymphocytes. The rates of SARS-CoV-2-infected monocytes in PBMCs from COVID-19 patients increased over time from symptom onset. Additionally, SARS-CoV-2-positive monocytes and B and CD4+T lymphocytes were detected by immunohistochemistry in post mortem lung tissue. SARS-CoV-2 infection of blood circulating leukocytes in COVID-19 patients may have important implications for disease pathogenesis, immune dysfunction, and virus spread within the host.
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7
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Pontelli MC, Castro IA, Martins RB, Veras FP, Serra LL, Nascimento DC, Cardoso RS, Rosales R, Lima TM, Souza JP, Caetité DB, de Lima MHF, Kawahisa JT, Giannini MC, Bonjorno LP, Lopes MIF, Batah SS, Siyuan L, Assad RL, Almeida SCL, Oliveira FR, Benatti MN, Pontes LLF, Santana RC, Vilar FC, Martins MA, Cunha TM, Calado RT, Alves-Filho JC, Zamboni DS, Fabro A, Louzada-Junior P, Oliveira RDR, Cunha FQ, Arruda E. Infection of human lymphomononuclear cells by SARS-CoV-2. bioRxiv 2020. [PMID: 34013264 DOI: 10.1101/2020.01.07.896506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Although SARS-CoV-2 severe infection is associated with a hyperinflammatory state, lymphopenia is an immunological hallmark, and correlates with poor prognosis in COVID-19. However, it remains unknown if circulating human lymphocytes and monocytes are susceptible to SARS-CoV-2 infection. In this study, SARS-CoV-2 infection of human peripheral blood mononuclear cells (PBMCs) was investigated both in vitro and in vivo . We found that in vitro infection of whole PBMCs from healthy donors was productive of virus progeny. Results revealed that monocytes, as well as B and T lymphocytes, are susceptible to SARS-CoV-2 active infection and viral replication was indicated by detection of double-stranded RNA. Moreover, flow cytometry and immunofluorescence analysis revealed that SARS-CoV-2 was frequently detected in monocytes and B lymphocytes from COVID-19 patients, and less frequently in CD4 + T lymphocytes. The rates of SARS-CoV-2-infected monocytes in PBMCs from COVID-19 patients increased over time from symptom onset. Additionally, SARS-CoV-2-positive monocytes and B and CD4+T lymphocytes were detected by immunohistochemistry in post mortem lung tissue. SARS-CoV-2 infection of blood circulating leukocytes in COVID-19 patients may have important implications for disease pathogenesis, immune dysfunction, and virus spread within the host.
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8
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Victorino VJ, Barroso WA, Assunção AKM, Cury V, Jeremias IC, Petroni R, Chausse B, Ariga SK, Herrera ACSA, Panis C, Lima TM, Souza HP. PGC-1β regulates HER2-overexpressing breast cancer cells proliferation by metabolic and redox pathways. Tumour Biol 2016; 37:6035-44. [PMID: 26602383 DOI: 10.1007/s13277-015-4449-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 11/17/2015] [Indexed: 10/22/2022] Open
Abstract
Breast cancer is a prevalent neoplastic disease among women worldwide which treatments still present several side effects and resistance. Considering that cancer cells present derangements in their energetic homeostasis, and that peroxisome proliferator-activated receptor- gamma coactivator 1 (PGC-1) is crucial for cellular metabolism and redox signaling, the main objective of this study was to investigate whether there is a relationship between PGC-1 expression, the proliferation of breast cancer cells and the mechanisms involved. We initially assessed PGC-1β expression in complementary DNA (cDNA) from breast tumor of patients bearing luminal A, luminal B, and HER2-overexpressed and triple negative tumors. Our data showed that PGC-1β expression is increased in patients bearing HER2-overexpressing tumors as compared to others subtypes. Using quantitative PCR and immunoblotting, we showed that breast cancer cells with HER2-amplification (SKBR-3) have greater expression of PGC-1β as compared to a non-tumorous breast cell (MCF-10A) and higher proliferation rate. PGC-1β expression was knocked down with short interfering RNA in HER2-overexpressing cells, and cells decreased proliferation. In these PGC-1β-inhibited cells, we found increased citrate synthase activity and no marked changes in mitochondrial respiration. Glycolytic pathway was decreased, characterized by lower intracellular lactate levels. In addition, after PGC-1β knockdown, SKBR-3 cells showed increased reactive oxygen species production, no changes in antioxidant activity, and decreased expression of ERRα, a modulator of metabolism. In conclusion, we show an association of HER2-overexpression and PGC-1β. PGC-1β knockdown impairs HER2-overexpressing cells proliferation acting on ERRα signaling, metabolism, and redox balance.
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Affiliation(s)
- Vanessa Jacob Victorino
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil.
| | - W A Barroso
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - A K M Assunção
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - V Cury
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - I C Jeremias
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - R Petroni
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - B Chausse
- Instituto de Química, Universidade de São Paulo (IQ-USP), São Paulo, Brazil
| | - S K Ariga
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - A C S A Herrera
- Faculdade de Medicina, Pontifícia Universidade Católica, PUC, Campus Londrina, Paraná, Brazil
| | - C Panis
- Laboratório de Mediadores Inflamatórios, Universidade Estadual do Oeste do Paraná (UNIOESTE), Campus Francisco Beltrão, Paraná, Brazil
| | - T M Lima
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - H P Souza
- Laboratório de Investigação Médica - LIM 51, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
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9
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Cardinot TM, Lima TM, Moretti AIS, Koike MK, Nunes VS, Cazita PM, Krieger MH, Brum PC, Souza HP. Preventive and therapeutic moderate aerobic exercise programs convert atherosclerotic plaques into a more stable phenotype. Life Sci 2016; 153:163-70. [PMID: 27074350 DOI: 10.1016/j.lfs.2016.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 04/01/2016] [Accepted: 04/05/2016] [Indexed: 01/22/2023]
Abstract
UNLABELLED The mechanisms by which exercise affects atherosclerotic plaque stability remain incompletely understood. We evaluated the effects of two training protocols on both atherosclerotic plaque structure and the signaling pathways involved in plaque rupture. METHODS Male low-density lipoprotein (LDL) receptor knockout mice were fed a high-fat, high-cholesterol diet (HFD). One group was subjected to moderate exercise using a treadmill for 14weeks (preventive protocol). The other group started an exercise regimen after 16weeks of the HFD (therapeutic group). Atherosclerotic plaques within the aorta were evaluated for lipid and collagen contents, as well as for inflammatory markers. Plasma cholesterol and cytokine levels were also determined. RESULTS The mice receiving a HFD developed hypercholesterolemia and atherosclerotic plaques within the aorta. The aortas from the animals in the preventive protocol exhibited smaller lipid cores and higher collagen content. These animals also exhibited lower CD40 expression within the plaques. The aortas of the mice in the therapeutic group exhibited higher collagen content, but no differences in either lipid core size or plaque size were noted. No differences in blood pressure, plasma cholesterol, cytokine levels, plaque size or metalloproteinase 9 expression were observed in the trained animals compared with the sedentary animals. CONCLUSION Moderate aerobic exercise modified atherosclerotic plaque characteristics and converted the plaques into a more stable phenotype, increasing the collagen content in response to both exercise programs. Furthermore, moderate aerobic exercise reduced the animals' fat content and decreased the activity of the CD40-CD40L signaling pathway in the preventive group.
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Affiliation(s)
- Themis M Cardinot
- Emergency Medicine Department (LIM-51), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Thais M Lima
- Emergency Medicine Department (LIM-51), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.
| | - Ana I S Moretti
- Emergency Medicine Department (LIM-51), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Marcia K Koike
- Emergency Medicine Department (LIM-51), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Valeria S Nunes
- Lipids Laboratory (LIM-10), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Patricia M Cazita
- Lipids Laboratory (LIM-10), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Marta H Krieger
- Department of Physiology and Biophysics, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Patricia C Brum
- School of Physical Education and Sports, Universidade de São Paulo, São Paulo, Brazil
| | - Heraldo P Souza
- Emergency Medicine Department (LIM-51), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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10
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Abstract
The fatty acids have an important role in the control of leukocyte metabolism and function. Higher concentrations of certain fatty acids, particularly polyunsaturated fatty acids (PUFAs) and volatile fatty acids, can cause cell death via apoptosis or, when concentrations are greater, necrosis. In this study, we determined the highest concentrations of various fatty acids that are non-toxic to two human leukemic cell lines, Jurkat (T-lymphocyte) and Raji (B-lymphocyte). Toxicity was evaluated by either loss of membrane integrity and/or DNA fragmentation using flow cytometric analysis. There were no remarkable differences for the toxicity of the fatty acids between B and T cell lines. The cytotoxicity of the fatty acids was related to the carbon chain length and number of double bonds: docosahexaenoic acid=eicosapentaenoic acid=arachidonic acid=gamma-linolenic acid=stearic acid=palmitic acid > linoleic acid=palmitoleic acid > vacenic acid=lauric acid > oleic acid > elaidic acid > capric acid > butyric acid > caprylic acid=caproic acid=propionic acid. The proportion of cells undergoing apoptosis or necrosis, induced by the fatty acids tested, remains to be investigated.
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Affiliation(s)
- T M Lima
- Thais Martins de Lima, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biomédicas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 1524, 05508-900, Butantã, São Paulo, SP, Brazil.
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11
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Damiani D, Dichtchekenian V, Setian N, Szeliga DV, Passos LD, Lima TM, Manna TD, Kuperman H. [Thyroid carcinoma in children and adolescents - review of six cases]. J Pediatr (Rio J) 2001; 77:45-8. [PMID: 14647619 DOI: 10.2223/jped.109] [Citation(s) in RCA: 2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE: Childhood thyroid carcinoma is a rare entity whose management is controversial. The objective of the present study was to evaluate the characteristics of these patients in terms of diagnosis and evolution. PATIENT AND METHODS: The evolution of six patients with thyroid cancer, followed at a Pediatric Endocrinology Unit during the past 17 years, was retrospectively reviewed. RESULTS: Six female patients with age ranging from 4.5 to 12 years were studied. In all 6 cases, thyroid nodules were present on the initial evaluation. Ultrasonography and 131I scintigraphy showed solid and cold nodules in four patients. Histologic findings indicated four papillary and two follicular carcinomas. All patients were submitted to total thyroidectomy; four were subsequently submitted to radiodine therapy due to the presence metastases and/or residual thyroid tissue. CONCLUSION: Our findings support the notion that children and adolescents with thyroid carcinoma have a positive prognosis; no cases of death occurred after 17 years of follow-up. Our data are in agreement with the literature, which describes low mortality rates for these cases.
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Affiliation(s)
- D Damiani
- Hospital das Clínicas, Universidade de São Paulo, SP, Brazil
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12
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Salazar LA, Hirata MH, Giannini SD, Forti N, Diament J, Lima TM, Hirata RD. Seven DNA polymorphisms at the candidate genes of atherosclerosis in Brazilian women with angiographically documented coronary artery disease. Clin Chim Acta 2000; 300:139-49. [PMID: 10958870 DOI: 10.1016/s0009-8981(00)00308-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [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: 12/11/2022]
Abstract
The possible association of genetic markers at the apolipoprotein E (HhaI polymorphism), apolipoprotein B (XbaI, EcoRI and Ins/Del polymorphisms), and low-density lipoprotein receptor (LDLR) (AvaII, HincII and PvuII polymorphisms) with coronary artery disease (CAD) was evaluated in 50 Brazilian women with CAD diagnosed by angiography and in 100 healthy women (controls). The frequency of E3/E4 genotype for HhaI polymorphism at the Apo E gene was significantly higher in CAD patients than in controls (40% vs. 14%, respectively, P<0.001). Similarly, the X-X- genotype for XbaI polymorphism was more frequent in CAD individuals than controls (42% vs. 12%, P<0.0001). The A+A+ and P1P1 genotypes for AvaII and PvuII polymorphisms at the LDLR locus were also higher in CAD subjects than controls (44% vs. 16%, P<0.001 and 64% vs. 39%, P<0.05, respectively). The estimated relative risks for CAD in women carrying the E3/E4, X-X-, A+A+ and P1P1 genotypes were 4.1 [95% confidence interval (CI), 3.0-5.6], 5.3 (95% CI, 3.8-7.5), 4.1 (95% CI, 3.0-5.5), and 2.8 (95% CI, 2.2-3.6), respectively. This study demonstrates that Apo E, Apo B and LDLR gene polymorphisms are associated with CAD in Brazilian Caucasian women.
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Affiliation(s)
- L A Salazar
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, Av. Lineu Prestes 580, CEP 05508-900, SP, São Paulo, Brazil.
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13
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Abstract
Bacterial retroelements, or retrons, use reverse transcriptase (RT) to produce a multicopy single-stranded DNA (msDNA) molecule that is covalently linked to RNA. In these studies we show that a retron from Escherichia coli 110, a clinical isolate, produces a novel RNA-less msDNA with a 5' phosphate residue. The msDNA is a 74-nucleotide single-stranded DNA molecule with a stable stem-loop structure without a mismatched base pair. Only the genes encoding msDNA (msd), msdRNA (msr), and RT (ret) are required to produce the msDNA molecule. The organization of these genes on the retron was similar to that of other elements producing branched msDNA-RNA. The conserved guanine, which is the branched residue in msDNA-RNA complexes and is essential for branch formation, is also present. Site-directed mutagenesis showed that this guanine is essential for the production of RNA-less msDNA. We postulate that the RNA-less msDNA in strain 110 is produced by nucleolytic cleavage of the branched msDNA-RNA compound.
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Affiliation(s)
- T M Lima
- Department of Microbiology, New York University Medical Center, 550 First Avenue, New York, New York 10016, USA
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14
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Abstract
In some Escherichia coli strains, a single-stranded DNA (msDNA) covalently linked to RNA is produced by a reverse transcriptase (RT) encoded by a genetic element called a retron. We have looked for host genes involved in msDNA synthesis. From screening of 10,000 mutants generated by Tn5 insertions, we obtained 3 chromosomal mutants defective msDNA synthesis. Analysis showed that all 3 mutants were affected in the gene for ribonuclease H (rnh). In rnh mutants, the reverse transcription products were heterogeneous with several sizes, smaller and bigger than the wild-type msDNA, showing that the reverse transcription is inhibited by the lack of RNase H activity. It also suggests that the RT recognizes the structure of msDNA for the termination of reverse transcription.
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Affiliation(s)
- T M Lima
- Department of Microbiology, New York University Medical Center, New York 10016, USA
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15
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Guth BE, Silva RM, Toledo MR, Lima TM, Trabulsi LR. Virulence factors and biochemical characteristics of serotypes of Escherichia coli serogroup O29. J Clin Microbiol 1989; 27:2161-4. [PMID: 2685018 PMCID: PMC266985 DOI: 10.1128/jcm.27.10.2161-2164.1989] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Escherichia coli strains belonging to serogroup O29 were studied. Invasiveness was the most common virulence factor described in this serogroup, but a few papers also reported production of heat-stable (ST) enterotoxin. In the present study invasive ability was found in O29:H- strains, whereas production of ST-I enterotoxin was observed only in serotype O29:H21 strains, showing that virulence was a characteristic of specific serotypes or bioserotypes within the O29 serogroup. Different serotypes were found among strains that were neither invasive nor toxigenic. Invasive strains were biochemically less active than the toxigenic ones and presented the invasiveness plasmid (pINV) of about 120 to 140 megadaltons, whereas hybridization tests showed that ST-I production was related to a plasmid of about 90 megadaltons. A diffuse adherence pattern to HeLa cells was observed in all ST-I isolates, but the role of this adherence in the pathogenicity of these strains was not determined. Thus, a unique biochemical pattern and plasmid profile may be useful characteristics to distinguish between pathogenic (toxigenic or invasive) and nonpathogenic O29 strains.
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Affiliation(s)
- B E Guth
- Department of Microbiology, Immunology, and Parasitology, Escola Paulista de Medicina, São Paulo, Brazil
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