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Costa M, Valente A, Freitas M, Almeida C, Teixeira C, Gonçalves M, Tavares N, Almeida D, Caeiro C, Augusto I, Sousa I, Barbosa M. Clinical benefit and tolerability of CDK4/6 inhibitors in the treatment of breast cancer advanced in the geriatric population – real life data from a Hospital Center. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01519-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Costa M, Valente A, Freitas M, Almeida C, Tavares N, Almeida D, Caeiro C, Augusto I, Sousa I, Barbosa M. Advanced breast cancer treatment after CDK4/6– inhibitors - the experience of a Hospital Center. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01538-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Costa M, Valente A, Costa I, Freitas M, Almeida C, Goncalves M, Fernandes C, Reis J, Teixeira C, Tavares N, Sarmento C, Barbosa M. P-204 Outcomes of geriatric population with resectable colorectal liver metastases cancer: Data from real life. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Campos TM, Novais FO, Saldanha M, Costa R, Lordelo M, Celestino D, Sampaio C, Tavares N, Arruda S, Machado P, Brodskyn C, Scott P, Carvalho EM, Carvalho LP. Granzyme B Produced by Natural Killer Cells Enhances Inflammatory Response and Contributes to the Immunopathology of Cutaneous Leishmaniasis. J Infect Dis 2020; 221:973-982. [PMID: 31748808 DOI: 10.1093/infdis/jiz538] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 10/15/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Skin lesions from patients infected with Leishmania braziliensis has been associated with inflammation induced by cytotoxic CD8+ T cells. In addition, CD8+ T cell-mediated cytotoxicity has not been linked to parasite killing. Meanwhile, the cytotoxic role played by natural killer (NK) cells in cutaneous leishmaniasis (CL) remains poorly understood. METHODS In this study, we observed higher frequencies of NK cells in the peripheral blood of CL patients compared with healthy subjects, and that NK cells expressed more interferon-γ, tumor necrosis factor (TNF), granzyme B, and perforin than CD8+ T cells. RESULTS We also found that most of the cytotoxic activity in CL lesions was triggered by NK cells, and that the high levels of granzyme B produced in CL lesions was associated with larger lesion size. Furthermore, an in vitro blockade of granzyme B was observed to decrease TNF production. CONCCLUSIONS Our data, taken together, suggest an important role by NK cells in inducing inflammation in CL, thereby contributing to disease immunopathology.
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Affiliation(s)
- Taís M Campos
- Laboratório de Pesquisas Clínicas, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil.,Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Fernanda O Novais
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Maíra Saldanha
- Laboratório Avançado de Saúde Pública, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil
| | - Rúbia Costa
- Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Morgana Lordelo
- Laboratório de Interação Parasito-Hospedeiro e Epidemiologia, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil
| | - Daniela Celestino
- Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Camilla Sampaio
- Laboratório de Pesquisas Clínicas, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil.,Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Natália Tavares
- Laboratório de Interação Parasito-Hospedeiro e Epidemiologia, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil
| | - Sérgio Arruda
- Laboratório Avançado de Saúde Pública, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil
| | - Paulo Machado
- Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,Instituto Nacional de Ciências e Tecnologia-Doenças Tropicais, Salvador, Brazil
| | - Cláudia Brodskyn
- Laboratório de Interação Parasito-Hospedeiro e Epidemiologia, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil
| | - Phillip Scott
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Edgar M Carvalho
- Laboratório de Pesquisas Clínicas, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil.,Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,Instituto Nacional de Ciências e Tecnologia-Doenças Tropicais, Salvador, Brazil
| | - Lucas P Carvalho
- Laboratório de Pesquisas Clínicas, Instituto Gonçalo Moniz, FIOCRUZ, Salvador, Brazil.,Serviço de Imunologia, Complexo Hospitalar Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,Instituto Nacional de Ciências e Tecnologia-Doenças Tropicais, Salvador, Brazil
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Costa I, Reis J, Costa M, Valente A, Fernandes C, Tavares N, Rey C, Sarmento C. P-344 The role of postoperative prognostic nutritional index as a prognostic factor and its association to systemic inflammatory response markers in stage III colon cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Freitas C, Tavares N, Jacob M, Mendonça D, Oliveira P, Araújo D, Novais-Bastos H, Fernandes G, Magalhães A, Queiroga H, Hespanhol V. P1.04-59 Modified Glasgow Prognostic Score Predict Survival Among Non-Small Cell Lung Cancer Patients Treated with Immune Checkpoint Inhibitors. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Tavares N, Costa A, Almeida D, Meireles S, Fernandes C, Rey C, Sarmento C, Damasceno M. The prognostic impact of sidedness in RAS wild-type colorectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Póvoa S, Tavares N, Ribeiro M, Azevedo D, Coelho A, Fernandes A, Costa A, Caeiro C, Carvalho B, Linhares P, Osório L, Castro L, Fonseca J, Damasceno M. Extended adjuvant temozolamide as prognostic factor of longer overall and progression-free survival in glioblastoma multiforme. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw367.28] [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] [Indexed: 11/13/2022] Open
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Ribeiro M, Povoa S, Tavares N, Marques C, Fernandes C, Almeida D, Augusto I. P-075 Neoadjuvant chemotherapy of esophageal cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tavares N, Afonso L, Suarez M, Ampuero M, Prates DB, Araújo-Santos T, Barral-Netto M, DosReis GA, Borges VM, Brodskyn C. Degranulating Neutrophils Promote Leukotriene B4 Production by Infected Macrophages To Kill Leishmania amazonensis Parasites. J Immunol 2016; 196:1865-73. [PMID: 26800873 DOI: 10.4049/jimmunol.1502224] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 12/17/2015] [Indexed: 11/19/2022]
Abstract
Neutrophils mediate early responses against pathogens, and they become activated during endothelial transmigration toward the inflammatory site. In the current study, human neutrophils were activated in vitro with immobilized extracellular matrix proteins, such as fibronectin (FN), collagen, and laminin. Neutrophil activation by FN, but not other extracellular matrix proteins, induces the release of the granules' contents, measured as matrix metalloproteinase 9 and neutrophil elastase activity in culture supernatant, as well as reactive oxygen species production. Upon contact with Leishmania amazonensis-infected macrophages, these FN-activated neutrophils reduce the parasite burden through a mechanism independent of cell contact. The release of granule proteases, such as myeloperoxidase, neutrophil elastase, and matrix metalloproteinase 9, activates macrophages through TLRs, leading to the production of inflammatory mediators, TNF-α and leukotriene B4 (LTB4), which are involved in parasite killing by infected macrophages. The pharmacological inhibition of degranulation reverted this effect, abolishing LTB4 and TNF production. Together, these results suggest that FN-driven degranulation of neutrophils induces the production of LTB4 and TNF by infected macrophages, leading to the control of Leishmania infection.
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Affiliation(s)
- Natália Tavares
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil
| | - Lilian Afonso
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil
| | - Martha Suarez
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; Universidade Federal da Bahia, Salvador, Bahia, Brazil
| | - Mariana Ampuero
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; Universidade Federal da Bahia, Salvador, Bahia, Brazil
| | - Deboraci Brito Prates
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; Universidade Federal da Bahia, Salvador, Bahia, Brazil
| | - Théo Araújo-Santos
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil
| | - Manoel Barral-Netto
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; Universidade Federal da Bahia, Salvador, Bahia, Brazil; Instituto de Investigação em Imunologia, São Paulo, Brazil
| | - George A DosReis
- Instituto de Biofísica Carlos Chagas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; and Instituto Nacional de Saúde e Ambiente na Região Amazônica, Rio de Janeiro, Brazil
| | - Valéria Matos Borges
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; Universidade Federal da Bahia, Salvador, Bahia, Brazil;
| | - Cláudia Brodskyn
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; Universidade Federal da Bahia, Salvador, Bahia, Brazil; Instituto de Investigação em Imunologia, São Paulo, Brazil;
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Vanikar AV, Trivedi HL, Dave SD, Kute VB, Rawal MN, Patel HV, Gumber MR, Afghahi H, Pirouzifard M, Svensson AM, Eliasson B, Svensson MK, Dumann K, Horrmann B, Lammert A, Rheinberger M, Gorski M, Kramer BK, Heid IM, Boger CA, Demirtas L, Akbas EM, Timuroglu A, Ozcicek F, Turkmen K, Fernandez-Fernandez B, Sanchez-Nino MD, Martin-Cleary C, Izquierdo MC, Elewa U, Ortiz A, Petrica L, Vlad A, Gluhovschi G, Gadalean F, Dumitrascu V, Gluhovschi C, Velciov S, Bob F, Vlad D, Popescu R, Petrica M, Jianu DC, Milas O, Izvernari O, Ursoniu S, Makino Y, Konoshita T, Nyumura I, Babazono T, Yoshida N, Uchigata Y, Handisurya A, Kerscher C, Tura A, Werzowa J, Heinzl H, Ristl R, Kautzky-Willer A, Pacini G, Saemann M, Schmidt A, Halbesma N, Metcalfe W, Bulum T, Prka in I, Blaslov K, Zibar K, Duvnjak L, Idorn T, Knop FK, Jorgensen MB, Christensen M, Holst JJ, Hornum M, Feldt-Rasmussen B, Naess H, Hartmann A, Jenssen TG, Holdaas H, Horneland R, Grzyb K, Bitter J, Midtvedt K, Yoshida N, Babazono T, Uchigata Y, Timar R, Gluhovschi G, Gadalean F, Velciov S, Petrica L, Timar B, Gluhovschi C, Soro-Paavonen A, Fleming T, Forsblom C, Gordin D, Tolonen N, Harjutsalo V, Nawroth PP, Groop PH, Tsuda A, Ishimura E, Uedono H, Yasumoto M, Nakatani S, Ichii M, Ohno Y, Ochi A, Mori K, Fukumoto S, Emoto M, Inaba M, Rheinberger M, Hormann B, Lammert A, Dumann K, Gorski M, Heid IM, Kramer BK, Boger CA, Siddaramaiah NH, Tez DK, Linker NJ, Bilous M, Winship S, Marshall SM, Bilous RW, Lampropoulou IT, Papagianni A, Stangou M, Didangelos T, Iliadis F, Efstratiadis G, Esposito P, Debarbieri G, Mereu R, Ditoro A, Montagna F, Groop PH, Bernardi L, Dal Canton A, Garland JS, Holden R, Morton R, Ross R, Adams M, Pruss C, Akbas EM, Demirtas L, Timuroglu A, Ozcicek F, Turkmen K, Bulum T, Prka in I, Blaslov K, Zibar K, Duvnjak L, Theodoridis M, Panagoutsos S, Bounta T, Roumeliotis S, Kantartzi K, Pouloutidis G, Passadakis P, Polaina Rusillo M, Borrego Utiel FJ, Ortega Anguiano S, Liebana Canada A, Gaber EW, Abdel Rehim WM, Ibrahim NA, Mahmoud BF, Silva AP, Fragoso A, Tavares N, Silva C, Santos N, Camacho A, Neves P, Rodriguez R, Porrini E, Gonzalez-Rinne A, De Vries A, Torres A, Salido E, Kato S, Makino H, Uzu T, Koya D, Nishiyama A, Imai E, Ando M, Jorgensen MB, Knop FK, Idorn T, Holst JJ, Hornum M, Feldt-Rasmussen B, Vaduva C, Popa S, Mitrea A, Mota M, Mota E, Theodoridis M, Panagoutsos S, Roumeliotis S, Bounta T, Kriki P, Roumeliotis A, Passadakis P, Ogawa T, Okazaki S, Hatano M, Hara H, Inamura M, Kiba T, Iwashita T, Shimizu T, Tayama Y, Kanozawa K, Kato H, Matsuda A, Hasegawa H, Elewa U, Fernandez B, Egido J, Ortiz A, Rottembourg J, Guerin A, Diaconita M, Dansaert A, Chakraborty J, Prabhu R, Nagaraju SP, Bairy M, Satyamoorthy K, Kosuru S, Parthasarathy R, Tomilina N, Zhilinskaya T, Stolyarevich E, Silva AP, Fragoso A, Guilherme P, Silva C, Santos N, Rato F, Camacho A, Neves P, Pasko N, Strakosha A, Toti F, Dedej T, Marku N, Petrela E, Zekollari E, Kacorri V, Thereska N, Roumeliotis SK, Roumeliotis AK, Theodoridis M, Tavridou A, Panagoutsos S, Passadakis P, Vargemezis V, Kim IY, Lee SB, Lee DW, Kim MJ, Shin MJ, Rhee H, Yang BY, Song SH, Seong EY, Kwak IS, Celebi K, Sengul E, Cekmen MB, Yilmaz A, Sonikian M, Dona A, Skarakis J, Miha T, Trompouki S, Karaitianou A, Spiliopoulou C, Dimas GG, Iliadis FS, Tegos TJ, Spiroglou SG, Kanellos IE, Fotiadis SD, Didaggelos TP, Savopoulos CG, Hatzitolios AI, Grekas DM, Hsu YH, Huang MC, Chang HY, Shin SJ, Wahlqvist ML, Chang YL, Hsu KC, Hsu CC, Miarka P, Grabowska-Polanowska B, Faber J, Skowron M, Pietrzycka A, Walus-Miarka M, Sliwka I, Sulowicz W. DIABETES CLINICAL. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Anastácio S, Tavares N, Carolino N, Sidi-Boumedine K, da Silva G. Serological evidence of exposure to Coxiella burnetii in sheep and goats in central Portugal. Vet Microbiol 2013; 167:500-5. [DOI: 10.1016/j.vetmic.2013.08.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 08/02/2013] [Accepted: 08/04/2013] [Indexed: 11/16/2022]
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Dâmaso A, Tavares N, França G. Adherence to anti-hypertensive treatment according to physical activity levels. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Turgutalp K, Ozhan O, Akbay E, Tiftik N, Ozcan T, Yilmaz S, Kiykim A, Wu HY, Peng YS, Huang JW, Wu KD, Tu YK, Chien KL, Kacso IM, Moldovan D, Lenghel A, Rusu CC, Gherman Caprioara M, Silva AP, Fragoso A, Pinho A, Silva C, Santos N, Tavares N, Faisca M, Camacho A, Mesquita F, Leao P, Silva AP, Silva C, Santos N, Rato F, Fragoso A, Pinho A, Faisca M, Mesquita F, Leao P, Silva AP, Silva C, Santos N, Rato F, Fragoso A, Pinho A, Faisca M, Mesquita F, Leao P, Oh DJ, Kim HR, Kim SH, Okasha K, Sweilam M, Nagy H, Hassan Rizk M, Kirkpantur A, Afsar B, Chae DW, Chin HJ, Kim S, Fallahzadeh Abarghouei MK, Dormanesh B, Roozbeh J, Kamali-Sarvestani E, Vessal G, Pakfetrat M, Sagheb MM, Imasawa T, Nishimura M, Kawaguchi T, Ishibashi R, Kitamura H, Vlad A, Petrica L, Petrica M, Jianu DC, Gluhovschi G, Ianculescu C, Negru M, Dumitrascu V, Gadalean F, Zamfir A, Popescu C, Giju S, Gluhovschi C, Velciov S, Milas O, Balgradean C, Ursoniu S, Afsar B, Silva AP, Pinho A, Fragoso A, Silva C, Santos N, Faisca M, Mesquita F, Leao P, Soltysiak J, Zachwieja J, Fichna P, Lipkowska K, Skowronska B, Stankiewicz W, Stachowiak-Lewandowska M, Kluska-Jozwiak A, Afghahi H, Prasad N, Bhadauria D, Gupta A, Sharma RK, Gupta A, Kaul A, Jain M, Loboda O, Dudar I, Korol L, Shifris I, Ito K, Ito K, Abe Y, Ogahara S, Yasuno T, Watanabe M, Sasatomi Y, Hisano S, Nakashima H, Saito T, Nogaibayeva A, Tuganbekova S, Taubaldiyeva Z, Bekishev B, Trimova R, Topchii I, Topchii I, Semenovykh P, Galchiskaya V, Efimova N, Scherban T, Yasuda F, Shimizu A, MII A, Fukui M, Postorino M, Alessi E, Dal Moro E, Postorino S, Mannino G, Giandalia A, Mannino D, Pontrelli P, Conserva F, Accetturo M, Papale M, DI Palma AM, Cordisco G, Grandaliano G, Gesualdo L, Kimoto E, Shoji T, Sonoda M, Shima H, Tsuchikura S, Mori K, Emoto M, Ishimura E, Nishizawa Y, Inaba M, Vogel C, Scholbach T, Bergner N, Lioudaki E, Lioudaki E, Stylianou K, Maragkaki E, Stratakis S, Panteri M, Choulaki C, Vardaki E, Ganotakis E, Daphnis E, Iqbal M, Ahmed Z, Mansur M, Iqbal S, Choudhury S, Nahar N, Ali S, Ahmed T, Alam A, Rahman Z, Islam M, Azad Khan A, Ogawa A, Sugiyama H, Kitagawa M, Morinaga H, Inoue T, Takiue K, Kikumoto Y, Uchida HA, Kitamura S, Maeshima Y, Tsuchiyama Y, Makino H, Nazemian F, Jafari M, Zahed NOS, Javidi Dasht Bayaz R, Papale M, DI Paolo S, Vocino G, DI Palma A, Federica C, Rocchetti MT, Grandaliano G, Gesualdo L, Prajitno CW, Ismail G, Ditoiu A, Stanciu S, Herlea V, Motoi O, Striker G, Uribarri J, Vlassara H, Gul B, Oz Gul O, Yildiz A, Eroglu A, Keni N, Ersoy C, Ersoy A, Imamoglu S, Yurtkuran M. Diabetes - Clinical. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Favali C, Tavares N, Clarêncio J, Barral A, Barral-Netto M, Brodskyn C. Leishmania amazonensis infection impairs differentiation and function of human dendritic cells. J Leukoc Biol 2007; 82:1401-6. [PMID: 17890507 DOI: 10.1189/jlb.0307187] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [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] Open
Abstract
Dendritic cells (DCs) are of utmost importance in initiating an immune response and may also function as targets for pathogens. The presence of pathogens inside DCs is likely to impair their functions and thus, influence immune responses. In the present report, we evaluated the impact of the presence of Leishmania amazonensis during differentiation and maturation of human monocyte-derived DCs. The presence of live L. amazonensis parasites during DC differentiation led to a significant decrease in CD80 (92%) and CD1a (56%) expression and an increase in CD86 (56%) cell surface expression. Phenotypic changes were accompanied by a lower secretion of IL-6, observed after 6 days of DC differentiation in the presence of L. amazonensis. DCs differentiated in the presence of L. amazonensis were used as APC in an autologous coculture, and lower amounts of IFN-gamma were obtained compared with control DCs differentiated in the absence of parasites. The effect of heat-killed parasites, but not of Leishmania antigen, during DC differentiation and maturation was similar to that observed with viable parasites. During maturation, the presence of live L. amazonensis parasites, but not of soluble Leishmania antigen, led to a decrease in IL-6 and IL-10 production. In this way, we observed that the parasite is able to abrogate full DC differentiation, causing a delay in the immune response and likely, favoring its establishment in human hosts.
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Affiliation(s)
- Cecilia Favali
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil
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Olofsson PA, Auffermann W, Higgins CB, Rabahie GN, Tavares N, Stoney RJ. Diagnosis of prosthetic aortic graft infection by magnetic resonance imaging. J Vasc Surg 1988; 8:99-105. [PMID: 3398183] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The accuracy of magnetic resonance imaging (MRI) in the diagnosis of prosthetic aortic graft infection was evaluated in 18 patients with history and findings suggestive of this complication. The prospective interpretation of MRI was compared with surgical findings. Sixteen patients had a graft infection verified at operation. Fourteen patients had infection of the retroperitoneal portion of the graft; two patients had an infection limited to one of the groins; no graft infection was found at surgical exploration in the remaining two patients. Perigraft infection was correctly diagnosed on the basis of MRI findings in 14 of 16 cases; findings were false negative in one case, questionable in another case, and correctly excluded graft infection in two of two cases. MRI also defined the extent of infection in 14 of 16 cases. MRI findings that supported the clinical suspicion of graft infection were perigraft fluid collections remaining more than 3 months after surgery. Furthermore, local inflammation was suggested by an increased signal intensity of adjacent muscle on T2-weighted images in some cases. CT scans were performed in 12 patients; these enabled a correct diagnosis in five and provided indeterminate or false information in seven. These results indicate that MRI is helpful in the diagnosis of aortic graft infection. Furthermore, MRI provides information about the extent of infection crucial for planning therapy.
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Affiliation(s)
- P A Olofsson
- Department of Surgery, University of California, San Francisco 94143
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