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Marques PH, Tiwari S, Felice AG, Jaiswal AK, Aburjaile FF, Azevedo V, Silva-Vergara ML, Ferreira-Paim K, Soares SDC, Fonseca FM. Design of a Multi-Epitope Vaccine against Histoplasma capsulatum through Immunoinformatics Approaches. J Fungi (Basel) 2024; 10:43. [PMID: 38248954 PMCID: PMC10817582 DOI: 10.3390/jof10010043] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/20/2023] [Accepted: 12/28/2023] [Indexed: 01/23/2024] Open
Abstract
Histoplasmosis is a widespread systemic disease caused by Histoplasma capsulatum, prevalent in the Americas. Despite its significant morbidity and mortality rates, no vaccines are currently available. Previously, five vaccine targets and specific epitopes for H. capsulatum were identified. Immunoinformatics has emerged as a novel approach for determining the main immunogenic components of antigens through in silico methods. Therefore, we predicted the main helper and cytotoxic T lymphocytes and B-cell epitopes for these targets to create a potential multi-epitope vaccine known as HistoVAC-TSFM. A total of 38 epitopes were found: 23 common to CTL and B-cell responses, 11 linked to HTL and B cells, and 4 previously validated epitopes associated with the B subunit of cholera toxin, a potent adjuvant. In silico evaluations confirmed the stability, non-toxicity, non-allergenicity, and non-homology of these vaccines with the host. Notably, the vaccine exhibited the potential to trigger both innate and adaptive immune responses, likely involving the TLR4 pathway, as supported by 3D modeling and molecular docking. The designed HistoVAC-TSFM appears promising against Histoplasma, with the ability to induce important cytokines, such as IFN-γ, TNF-α, IL17, and IL6. Future studies could be carried out to test the vaccine's efficacy in in vivo models.
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Affiliation(s)
- Pedro Henrique Marques
- Postgraduate Interunits Program in Bioinformatics, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil; (P.H.M.); (A.K.J.)
- Department of Preventive Veterinary, Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Sandeep Tiwari
- Institute of Biology, Federal University of Bahia, Salvador 40170-115, Brazil;
- Institute of Health Sciences, Federal University of Bahia, Salvador 40170-115, Brazil
| | - Andrei Giacchetto Felice
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (A.G.F.); (S.d.C.S.)
| | - Arun Kumar Jaiswal
- Postgraduate Interunits Program in Bioinformatics, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil; (P.H.M.); (A.K.J.)
| | - Flávia Figueira Aburjaile
- Department of Preventive Veterinary, Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Vasco Azevedo
- Department of Genetics, Ecology and Evolution, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil;
| | - Mario León Silva-Vergara
- Department of Infectious Diseases, Federal University of Triangulo Mineiro, Uberaba 38025-440, Brazil;
| | - Kennio Ferreira-Paim
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (A.G.F.); (S.d.C.S.)
| | - Siomar de Castro Soares
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (A.G.F.); (S.d.C.S.)
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Dutra VR, Silva LF, Oliveira ANM, Beirigo EF, Arthur VM, Bernardes da Silva R, Ferreira TB, Andrade-Silva L, Silva MV, Fonseca FM, Silva-Vergara ML, Ferreira-Paim K. Fatal Case of Fungemia by Wickerhamomyces anomalus in a Pediatric Patient Diagnosed in a Teaching Hospital from Brazil. J Fungi (Basel) 2020; 6:jof6030147. [PMID: 32854208 PMCID: PMC7558373 DOI: 10.3390/jof6030147] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 08/04/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 02/07/2023] Open
Abstract
In recent decades, emerging fungal infections have changed the clinical mycology scenario as a consequence of the advances in medical diagnostics and therapeutic procedures, long hospitalization times, and the growing number of individuals with debilitating chronic diseases and impaired immune systems. This report presents a 19 months old Brazilian female patient who developed a severe fungal sepsis by an uncommon yeast. She was admitted at the intensive care unit with severe pneumonia, bronchopulmonary dysplasia, and weight-for-age z score of less than −2. She remained more than 30 days in the intensive care unit where she had a femoral venous catheter placement, enteral nutrition, broad-spectrum antibiotic therapy, and prophylaxis with fluconazole. Moreover, pericardiocentesis was performed due to cardiac tamponade. She had a previous history of prematurity, cardiac surgery due to patent ductus arteriosus, and a long period of hospital stay. Despite the antifungal prophylaxis, two yeast isolates were recovered from blood and then identified by classical mycological methods and internal transcribed spacer (ITS) sequencing as Wickerhamomyces anomalus. Both isolates exhibited susceptibility to amphotericin B, ketoconazole, itraconazole, voriconazole, and fluconazole. Her clinical state worsened, presenting anasarca, epistaxis, and hemorrhagic suffusions in the mouth, sclera, oliguria, and bradycardia. Two days after the first positive culture, she presented a gradual reduction of the white blood cells count, with severe leukopenia and neutropenia. She died five days after.
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Affiliation(s)
- Vitor Rodrigues Dutra
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
| | - Leonardo Francisco Silva
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
| | | | - Emília Freitas Beirigo
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
| | - Vanessa Mello Arthur
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
| | - Raíssa Bernardes da Silva
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
| | - Thatiana Bragine Ferreira
- Department of Infectious Diseases, Federal University of Triangulo Mineiro, Uberaba 38025-440, Brazil; (T.B.F.); (L.A.-S.); (M.L.S.-V.)
| | - Leonardo Andrade-Silva
- Department of Infectious Diseases, Federal University of Triangulo Mineiro, Uberaba 38025-440, Brazil; (T.B.F.); (L.A.-S.); (M.L.S.-V.)
| | - Marcos Vinícius Silva
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
| | | | - Mario León Silva-Vergara
- Department of Infectious Diseases, Federal University of Triangulo Mineiro, Uberaba 38025-440, Brazil; (T.B.F.); (L.A.-S.); (M.L.S.-V.)
| | - Kennio Ferreira-Paim
- Department of Microbiology, Immunology and Parasitology, Federal University of Triangulo Mineiro, Uberaba 38015-050, Brazil; (V.R.D.); (L.F.S.); (E.F.B.); (V.M.A.); (R.B.d.S.); (M.V.S.)
- Department of Infectious Diseases, Federal University of Triangulo Mineiro, Uberaba 38025-440, Brazil; (T.B.F.); (L.A.-S.); (M.L.S.-V.)
- Correspondence: ; Tel.: +55-34-3700-6480
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Silva THS, Araújo CV, Santos KMDC, Alves NDS, Gomes THS, Silva AKFE, Silva NCLDS, Damasceno ECB, de Carvalho AMA, Mendes MGA, Caminha HB, Daboit TC, Ferreira TB, Andrade-Silva LE, Silva-Vergara ML, Ferreira-Paim K, Fonseca FM. Synergic effect of simvastatin in combination with amphotericin B against environmental strains of Cryptococcus neoformans from northeastern Brazil: a prospective experimental study. SAO PAULO MED J 2020; 138:40-46. [PMID: 32321104 PMCID: PMC9673851 DOI: 10.1590/1516-3180.2019.0107.r2.16092019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/16/2019] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Statins are used as cholesterol-lowering drugs and may also have direct antimicrobial effects. OBJECTIVE To evaluate synergic interactions between simvastatin and both amphotericin B and fluconazole, against environmental strains of Cryptococcus neoformans isolated from captive birds' droppings. DESIGNAND SETTING Experimental study conducted at Federal University of Piauí, Parnaíba, in collaboration with Federal University of Triângulo Mineiro, Uberaba, Brazil. METHODS Statin susceptibility tests of Cryptococcus neoformans samples were performed as prescribed in standards. Interactions of simvastatin with amphotericin and fluconazole were evaluated using the checkerboard microdilution method. Presence of these interactions was quantitatively detected through determining the fractional inhibitory concentration index (FICI). RESULTS Isolates of Cryptococcus neoformans were obtained from 30 of the 206 samples of dry bird excreta (14.5%) that were collected from pet shops and houses. Ten isolates were selected for susceptibility tests. All of them were susceptible to amphotericin and fluconazole. All presented minimum inhibitory concentration (MIC) > 128 µg/ml and, thus, were resistant in vitro to simvastatin. An in vitro synergic effect was shown through combined testing of amphotericin B and simvastatin, such that six isolates (60%) presented FICI < 0.500. Two isolates showed considerable reductions in MIC, from 1 µg/ml to 0.250 µg/ml. No synergic effect was observed through combining fluconazole and simvastatin. CONCLUSION These results demonstrate that simvastatin should be considered to be a therapeutic alternative, capable of potentiating the action of amphotericin B. However, further studies are necessary to clarify the real effect of simvastatin as an antifungal agent.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Henrique Barros Caminha
- MSc. Doctoral Student, Department of Biomedical Sciences, Universidade Federal do Piauí, Parnaíba (PI), Brazil.
| | - Tatiane Caroline Daboit
- PhD. Associate Professor, Department of Medicine, Universidade Federal do Piauí, Parnaíba (PI), Brazil.
| | - Thatiana Bragine Ferreira
- MSc. Doctoral Student, Department of Infectious and Parasitic Diseases, Universidade Federal do Triângulo Mineiro, Uberaba (MG), Brazil.
| | | | - Mario León Silva-Vergara
- PhD. Associate Professor, Department of Infectious and Parasitic Diseases, Universidade Federal do Triângulo Mineiro, Uberaba (MG), Brazil.
| | - Kennio Ferreira-Paim
- PhD. Associate Professor, Department of Microbiology, Universidade Federal do Triângulo Mineiro, Uberaba (MG), Brazil.
| | - Fernanda Machado Fonseca
- PhD. Associate Professor, Department of Biomedicine, Universidade Federal do Triângulo Mineiro, Uberaba (MG), Brazil.
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Sousa JB, Etchebehere RM, Queiroz DMDM, Fonseca FM, Batista BB, Junqueira IS, Camilo SMP, Oliveira AGD. Increased serum gastrin in patients with different clinical forms of Chagas disease coinfected with Helicobacter pylori. Rev Inst Med Trop Sao Paulo 2019; 61:e7. [PMID: 30785561 PMCID: PMC6376922 DOI: 10.1590/s1678-9946201961007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/10/2018] [Indexed: 12/23/2022] Open
Abstract
Trypanosoma cruzi and Helicobacter pylori (HP) are pathogens that cause chronic diseases and have been associated with hypergastrinemia. The aim of this study was to evaluate the fasting gastrin levels in patients with different clinical forms of Chagas disease (CD), coinfected or not by HP. The enrolled individuals were outpatients attending at the university hospital. HP infection was assessed by serology and 13 C-urea breath test. Fasting serum gastrin concentration was measured by chemiluminescence assay. Gastric endoscopic and histological features were also evaluated. Associations between CD and serum gastrin level were evaluated in a logistical model, adjusting for age, gender and HP status. A total of 113 patients were evaluated (45 with Chagas disease and 68 controls). In the multivariate analysis, increasing serum gastrin levels (OR= 1.02; 95% CI= 1.01-1.12), increasing age (OR= 1.05; 95% CI= 1.02 - 1.09) and HP-positive status (OR = 2.88; 95% CI = 1.10 - 7.51) remained independently associated with CD. The serum gastrin levels were significantly higher in the group of patients with the cardiodigestive form ( P = 0.03) as well as with digestive form ( P = <0.001) of Chagas disease than in the controls. In conclusion, patients with cardiodigestive and digestive clinical forms of CD have increased basal serum gastrin levels in comparison with controls. Moreover, we also demonstrated that H. pylori coinfection contributes to the hypergastrinemia shown in CD.
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Affiliation(s)
- Jacqueline Batista Sousa
- Universidade Federal do Triângulo Mineiro, Instituto de Ciências Biológicas e Naturais, Uberaba, Minas Gerais, Brazil
| | | | | | - Fernanda Machado Fonseca
- Universidade Federal do Triângulo Mineiro, Instituto de Ciências Biológicas e Naturais, Uberaba, Minas Gerais, Brazil
| | - Bianca Bontempi Batista
- Universidade Federal do Triângulo Mineiro, Instituto de Ciências Biológicas e Naturais, Uberaba, Minas Gerais, Brazil
| | | | | | - Adriana Gonçalves de Oliveira
- Universidade Federal do Triângulo Mineiro, Instituto de Ciências Biológicas e Naturais, Uberaba, Minas Gerais, Brazil
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Andrade-Silva LE, Ferreira-Paim K, Ferreira TB, Vilas-Boas A, Mora DJ, Manzato VM, Fonseca FM, Buosi K, Andrade-Silva J, Prudente BDS, Araujo NE, Sales-Campos H, da Silva MV, Júnior VR, Meyer W, Silva-Vergara ML. Genotypic analysis of clinical and environmental Cryptococcus neoformans isolates from Brazil reveals the presence of VNB isolates and a correlation with biological factors. PLoS One 2018; 13:e0193237. [PMID: 29505557 PMCID: PMC5837091 DOI: 10.1371/journal.pone.0193237] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 02/07/2018] [Indexed: 11/19/2022] Open
Abstract
Cryptococcal infections are mainly caused by members of the Cryptococcus neoformans species complex (molecular types VNI, VNII, VNB, VNIV and the AD hybrid VNIII). PCR of the mating type loci and MLST typing using the ISHAM-MLST consensus scheme were used to evaluate the genetic relationship of 102 (63 clinical and 39 environmental) C. neoformans isolates from Uberaba, Brazil and to correlate the obtained genotypes with clinical, antifungal susceptibility and virulence factor data. All isolates were mating type alpha. MLST identified 12 known and five new sequence types (ST). Fourteen STs were identified within the VNI isolates, with ST93 (57/102, 56%) and ST77 (19/102, 19%) being the most prevalent. From the nine VNII isolates previously identify by URA5-RFLP only four (ST40) were confirmed by MLST. The remaining five grouped within the VNB clade in the phylogenetic analysis corresponding to the sequence type ST504. Other two environmental isolates also grouped within VNB clade with the new sequence type ST527. The four VNII/ST40 isolates were isolated from CSF. The two VNIV sequence types (ST11 and ST160) were isolated from blood cultures. Two of six patients evaluated with more than one isolates had mixed infections. Amongst the VNI isolates 4 populations were identified, which showed differences in their susceptibility profiles, clinical outcome and virulence factors. These results reinforce that ST93 is the most prevalent ST in HIV-infected patients in the Southeastern region of Brazil. The finding of the VNB molecular type amongst environmental Brazilian isolates highlights that this genotype is not restricted to the African continent.
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Affiliation(s)
- Leonardo Euripedes Andrade-Silva
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
- Clinical Pathology Department, Triangulo Mineiro Federal University, Uberaba, Brazil
| | - Kennio Ferreira-Paim
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
- Clinical Pathology Department, Triangulo Mineiro Federal University, Uberaba, Brazil
- Molecular Mycology Research Laboratory, Centre for Infectious Diseases and Microbiology, Marie Bashir Institute for Emerging Infectious Diseases and Biosecurity, Sydney Medical School-Westmead Hospital, The University of Sydney, Westmead Institute for Medical Research, Sydney, Australia
| | | | - Anderson Vilas-Boas
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
| | - Delio José Mora
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
| | | | | | - Kelli Buosi
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
| | - Juliana Andrade-Silva
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
| | | | - Natalia Evelyn Araujo
- Infectious Disease Department, Triangulo Mineiro Federal University, Uberaba, Brazil
| | | | | | | | - Wieland Meyer
- Molecular Mycology Research Laboratory, Centre for Infectious Diseases and Microbiology, Marie Bashir Institute for Emerging Infectious Diseases and Biosecurity, Sydney Medical School-Westmead Hospital, The University of Sydney, Westmead Institute for Medical Research, Sydney, Australia
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Estevam RB, Wood da Silva NMJ, Wood da Silva, Fonseca FM, Oliveira AGD, Nogueira, Pereira SADL, Pereira TL, Adad SJ, Rodrigues VJ, Rodrigues DBR. Modulation of Galectin-3 and Galectin 9 in gastric mucosa of patients with chronic gastritis and positive Helicobacter pylori infection. Pathol Res Pract 2017; 213:1276-1281. [DOI: 10.1016/j.prp.2017.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/15/2017] [Accepted: 08/17/2017] [Indexed: 01/19/2023]
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Rios Neto MA, Rios VM, Corá LF, Fonseca MM, Ferreira-Paim K, Fonseca FM. High rates of antimicrobial resistance of ESBL-producing Enterobacteriaceae isolated from clinical samples in Northeast of Brazil. Infect Dis (Lond) 2017; 50:229-231. [PMID: 28944710 DOI: 10.1080/23744235.2017.1381987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
| | | | - Luiza Franco Corá
- b Department of Infectious and Parasitic Diseases , Triangulo Mineiro Federal University , Uberaba , Minas Gerais , Brazil
| | | | - Kennio Ferreira-Paim
- b Department of Infectious and Parasitic Diseases , Triangulo Mineiro Federal University , Uberaba , Minas Gerais , Brazil
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Rodrigues DB, Silva EW, Silva NJ, Fonseca FM, Sawan M, Ribeiro BM, Oliveira AG, Martins RDN, Pereira SA, Adad SJ, Rodrigues V. Interleukin-17 are the major cytokine in chronic gastritis induced by Helicobacter pylori infection. The Journal of Immunology 2016. [DOI: 10.4049/jimmunol.196.supp.66.23] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Helicobacter pylori (H. pylori) is a highly prevalent bacteria directly involved in various diseases of the upper digestive tract such as gastritis, peptic ulcer and gastric cancer. In this study we analyze in situ immune response in gastric biopsies obtained during endoscopic procedures from 49 patients. Quantitative PCR were performed on cDNA copies of total RNA extracted from each biopsies. PCR were done using Taqman system to selected cytokines and cytokines transcriptions factor representative of Th1, Th2, Treg and Th17 lymphocytes. The relative number of mRNA copies were adjusted using the beta actin gene. The analysis were performed on samples grouped according to presence or absence of H. pylori infection. No significant difference was found in the expression of IFN-γ, IL-4 and IL-10 when comparisons were done between patients with and without H. pylori infection. Moreover, no difference was observed in the expression of T-bet, GATA-3 and FoxP3. On the other hand, the levels of IL-17 and ROR-gamma T were significantly higher in samples obtained from patients with H. pylori infection, compared with those from non infected. The results presented here suggest that IL-17 are involved in the chronic inflammatory process induced by H. pylori.
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Fonseca FM, Etchebehere RM, Queiroz DMDM, Rocha AMC, Junqueira IS, Fonseca DND, Rodrigues ALB, Crema E, de Oliveira AG. Histological and endoscopic features of the stomachs of patients with Chagas disease in the era of Helicobacter pylori. Rev Soc Bras Med Trop 2014; 47:739-46. [DOI: 10.1590/0037-8682-0180-2014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 11/27/2014] [Indexed: 11/22/2022] Open
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Fonseca FM, Queiroz DMDM, Rocha AMC, Prata A, Crema E, Rodrigues Junior V, Ramirez LE, Oliveira AGD. Seroprevalence of Helicobacter pylori infection in chagasic and nonchagasic patients from the same geographical region of Brazil. Rev Soc Bras Med Trop 2012; 45:194-8. [PMID: 22534991 DOI: 10.1590/s0037-86822012000200011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Accepted: 09/30/2011] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION In this study, we evaluated the seroprevalence of Helicobacter pylori infection among chagasic and non-chagasic subjects as well as among the subgroups of chagasic patients with the indeterminate, cardiac, digestive, and cardiodigestive clinical forms. METHODS The evaluated subjects were from the Triângulo Mineiro region, Minas Gerais, Brazil. Chagasic patients showed positive reactions to the conventional serological tests used and were classified according to the clinical form of their disease. Immunoglobulin G antibodies specific to H. pylori were measured using a commercial enzyme-linked immunosorbent assay kit. RESULTS The overall H. pylori prevalence was 77.1% (239/310) in chagasic and 69.1% (168/243) in non-chagasic patients. This difference was statistically significant even after adjustment for age and sex (odds ratio = 1.57; 95% confidence interval, 1.02-2.42; p = 0.04) in multivariate analysis. The prevalence of infection increased with age in the non-chagasic group (p = 0.007, χ² for trend), but not in the chagasic group (p = 0.15, χ² for trend). H. pylori infection was not associated with digestive or other clinical forms of Chagas disease (p = 0.27). CONCLUSIONS Our findings demonstrate that chagasic patients have a higher prevalence of H. pylori compared to non-chagasic subjects; a similar prevalence was found among the diverse clinical forms of the disease. The factors contributing to the frequent co-infection with H. pylori and Trypanosoma cruzi as well as its effects on the clinical outcome deserve further study.
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