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Arcanjo GS, Batista JVG, Oliveira JM, Domingos IF, Hatzlhofer BLD, Araújo AB, Anjos ACD, Araújo AS, Lucena-Araújo AR, Bezerra MAC. ASSOCIATION OF VITAMIN D RECEPTOR (VDR) VARIANTS, HYDROXYUREA THERAPY, AND CEREBROVASCULAR DISEASE STATUS ON 25-HYDROXYVITAMIN D (25(OH)D) LEVELS IN PATIENTS WITH SICKLE CELL ANEMIA. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.065] [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: 11/11/2022] Open
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Araújo AB, Soares TB, Schmalfuss T, Angeli MH, Furlan JM, Salton GD, Burin MM, Röhsig LM. Non-cryopreserved peripheral blood stem cells as a safe and effective alternative for autologous transplantation in multiple myeloma. Transfusion 2022; 62:1967-1972. [PMID: 36052689 DOI: 10.1111/trf.17090] [Citation(s) in RCA: 1] [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: 05/23/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 01/10/2023]
Abstract
BACKGROUND Autologous stem cell transplantation is the standard procedure for multiple myeloma and the grafts are usually cryopreserved. Previous studies reported advantages in the use of fresh peripheral blood stem cells (PBSC) autotransplantation compared to cryopreservation of the grafts. This study compared the transplant-related outcomes of two graft preservation methods: fresh storage (4°C/72 h) and cryopreservation (-80°C). STUDY DESIGN AND METHODS We performed an analysis of 45 patients with multiple myeloma under autotransplantation (17 fresh and 28 cryopreserved) from 2017 to 2021. Fresh PBSC were maintained in the refrigerator for three days in a concentration up to 300 × 103 TNC/μL. Cryopreserved PBSC were concentrated by plasma reduction after centrifugation (950 g/10 min/4°C) and an equal volume of cryoprotection solution was added for a final concentration of 300 × 103 TNC/μL, 5% DMSO, 6% hydroxyethyl starch, and 3% human albumin. RESULTS Neutrophil engraftment was significantly faster with fresh PBSCs (10 vs. 11.5 days, p = 0.045). Adverse effects were more common in cryopreserved PBSC transplantation (75% vs. 35.3% patients; p = 0.013). Post transplantation hospital stay was 20 and 22 days for fresh and cryopreserved PBSCs respectively (p = 0.091). There was no difference in platelet engraftment time (10.5 days for both; p = 0.133), number of antibiotics used after transplantation (3 for fresh and 2.5 for cryopreserved; p = 0.828), days of antibiotic use after transplantation (12.2 days for fresh and 13.3 days for cryopreserved, p = 0.579), and overall survival (p = 0.736). CONCLUSION The infusion of fresh PBSC refrigerated for up to three days is effective and safe for autologous transplantation in patients with multiple myeloma, which is a useful alternative to cryopreserved PBSC.
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Affiliation(s)
- Anelise Bergmann Araújo
- Centro de Processamento Celular, Serviço de Hemoterapia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Tahiane Brum Soares
- Serviço de Hematologia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Tissiana Schmalfuss
- Centro de Processamento Celular, Serviço de Hemoterapia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Melissa Helena Angeli
- Centro de Processamento Celular, Serviço de Hemoterapia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Juliana Monteiro Furlan
- Centro de Processamento Celular, Serviço de Hemoterapia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Gabrielle Dias Salton
- Centro de Processamento Celular, Serviço de Hemoterapia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Liane Marise Röhsig
- Centro de Processamento Celular, Serviço de Hemoterapia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
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Sant'Ana AN, Araújo AB, Gonçalves FDC, Paz AH. Effects of living and metabolically inactive mesenchymal stromal cells and their derivatives on monocytes and macrophages. World J Stem Cells 2021; 13:1160-1176. [PMID: 34630856 PMCID: PMC8474715 DOI: 10.4252/wjsc.v13.i9.1160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/01/2021] [Accepted: 09/03/2021] [Indexed: 02/06/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) are multipotent and self-renewing stem cells that have great potential as cell therapy for autoimmune and inflammatory disorders, as well as for other clinical conditions, due to their immunoregulatory and regenerative properties. MSCs modulate the inflammatory milieu by releasing soluble factors and acting through cell-to-cell mechanisms. MSCs switch the classical inflammatory status of monocytes and macrophages towards a non-classical and anti-inflammatory phenotype. This is characterized by an increased secretion of anti-inflammatory cytokines, a decreased release of pro-inflammatory cytokines, and changes in the expression of cell membrane molecules and in metabolic pathways. The MSC modulation of monocyte and macrophage phenotypes seems to be critical for therapy effectiveness in several disease models, since when these cells are depleted, no immunoregulatory effects are observed. Here, we review the effects of living MSCs (metabolically active cells) and metabolically inactive MSCs (dead cells that lost metabolic activity by induced inactivation) and their derivatives (extracellular vesicles, soluble factors, extracts, and microparticles) on the profile of macrophages and monocytes and the implications for immunoregulatory and reparative processes. This review includes mechanisms of action exhibited in these different therapeutic approaches, which induce the anti-inflammatory properties of monocytes and macrophages. Finally, we overview several possibilities of therapeutic applications of these cells and their derivatives, with results regarding monocytes and macrophages in animal model studies and some clinical trials.
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Affiliation(s)
- Alexia Nedel Sant'Ana
- Laboratório de Células Tecidos e Genes, Hospital de Clínicas de Porto Alegre, Porto Alegre 90035-903, RS, Brazil
| | - Anelise Bergmann Araújo
- Centro de Processamento Celular, Hospital de Clínicas de Porto Alegre, Porto Alegre 90035-903, RS, Brazil
| | | | - Ana Helena Paz
- Laboratório de Células Tecidos e Genes, Hospital de Clínicas de Porto Alegre, Porto Alegre 90035-903, RS, Brazil
- Departamento de Ciências Morfológicas, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-903, RS, Brazil
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da Cruz LLP, de Souza PO, Dal Prá M, Falchetti M, de Abreu AM, Azambuja JH, Bertoni APS, Paz AHR, Araújo AB, Visioli F, Fazolo T, da Silva GG, Worm PV, Wink MR, Zanotto-Filho A, Braganhol E. TLR4 expression and functionality are downregulated in glioblastoma cells and in tumor-associated macrophages: A new mechanism of immune evasion? Biochim Biophys Acta Mol Basis Dis 2021; 1867:166155. [PMID: 33932524 DOI: 10.1016/j.bbadis.2021.166155] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 03/30/2021] [Accepted: 04/22/2021] [Indexed: 02/08/2023]
Abstract
Glioblastoma (GB) is the most common and aggressive form of primary brain tumor, in which the presence of an inflammatory environment, composed mainly by tumor-associated macrophages (TAMs), is related to its progression and development of chemoresistance. Toll-Like Receptors (TLRs) are key components of the innate immune system and their expression in both tumor and immune-associated cells may impact the cell communication in the tumor microenvironment (TME), further modeling cancer growth and response to therapy. Here, we investigated the participation of TLR4-mediated signaling as a mechanism of induced-immune escape in GB. Initially, bioinformatics analysis of public datasets revealed that TLR4 expression is lower in GB tumors when compared to astrocytomas (AST), and in a subset of TAMs. Further, we confirmed that TLR4 expression is downregulated in chemoresistant GB, as well as in macrophages co-cultured with GB cells. Additionally, TLR4 function is impaired in those cells even following stimulation with LPS, an agonist of TLR4. Finally, experiments performed in a cohort of clinical primary and metastatic brain tumors indicated that the immunostaining of TLR4 and CD45 are inversely proportional, and confirmed the low TLR4 expression in GBs. Interestingly, the cytoplasmic/nuclear pattern of TLR4 staining in cancer tissues suggests additional roles of this receptor in carcinogenesis. Overall, our data suggest the downregulation of TLR4 expression and activity as a strategy for GB-associated immune escape. Additional studies are necessary to better understand TLR4 signaling in TME in order to improve the benefits of immunotherapy based on TLR signaling.
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Affiliation(s)
- L L P da Cruz
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - P O de Souza
- Programa de Pós-Graduação em Biociências, UFCSPA, Porto Alegre, RS, Brazil
| | - M Dal Prá
- Programa de Pós-Graduação em Biociências, UFCSPA, Porto Alegre, RS, Brazil
| | - M Falchetti
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - A M de Abreu
- Programa de Pós-Graduação em Biociências, UFCSPA, Porto Alegre, RS, Brazil
| | - J H Azambuja
- Programa de Pós-Graduação em Biociências, UFCSPA, Porto Alegre, RS, Brazil
| | - A P S Bertoni
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - A H R Paz
- Departamento de Morfologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - A B Araújo
- Centro de Processamento Celular, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
| | - F Visioli
- Faculdade de Odontologia, UFRGS, Porto Alegre, RS, Brazil
| | - T Fazolo
- Hospital Moinhos de Vento, Porto Alegre, RS, Brazil
| | - G G da Silva
- Hospital São José, Irmandade Santa Casa de Misericórdia de Porto Alegre (ISCMPA), Porto Alegre, RS, Brazil
| | - P V Worm
- Hospital São José, Irmandade Santa Casa de Misericórdia de Porto Alegre (ISCMPA), Porto Alegre, RS, Brazil; Departamento de Cirurgia, UFCSPA, Porto Alegre, RS, Brazil
| | - M R Wink
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Biociências, UFCSPA, Porto Alegre, RS, Brazil
| | - A Zanotto-Filho
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - E Braganhol
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Biociências, UFCSPA, Porto Alegre, RS, Brazil; Instituto de Cardiologia do Rio Grande do Sul/Fundação Universitária do Instituto de Cardiologia (IC-FUC), Porto Alegre, RS, Brazil.
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Araújo AB, Furlan JM, Salton GD, Schmalfuss T, Röhsig LM, Silla LMR, Passos EP, Paz AH. Isolation of human mesenchymal stem cells from amnion, chorion, placental decidua and umbilical cord: comparison of four enzymatic protocols. Biotechnol Lett 2018; 40:989-998. [PMID: 29619744 DOI: 10.1007/s10529-018-2546-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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: 12/18/2017] [Accepted: 03/27/2018] [Indexed: 01/02/2023]
Abstract
OBJECTIVE To compare four enzymatic protocols for mesenchymal stem cells (MSCs) isolation from amniotic (A-MSC) and chorionic (C-MSC) membranes, umbilical cord (UC-MSC) and placental decidua (D-MSC) in order to define a robust, practical and low-cost protocol for each tissue. RESULTS A-MSCs and UC-MSCs could be isolated from all samples using trypsin/collagenase-based protocols; C-MSCs could be isolated from all samples with collagenase- and trypsin/collagenase-based protocols; D-MSCs were isolated from all samples exclusively with a collagenase-based protocol. CONCLUSIONS The trypsin-only protocol was least efficient; the collagenase-only protocol was best for C-MSCs and D-MSCs; the combination of trypsin and collagenase was best for UC-MSCs and none of tested protocols was adequate for A-MSCs isolation.
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Affiliation(s)
- A B Araújo
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil. .,Federal University of Rio Grande do Sul, Porto Alegre, Brazil. .,Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil.
| | - J M Furlan
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - G D Salton
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - T Schmalfuss
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - L M Röhsig
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - L M R Silla
- Cellular Technology and Therapy Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - E P Passos
- Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - A H Paz
- Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
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Araújo AB, Salton GD, Furlan JM, Schneider N, Angeli MH, Laureano ÁM, Silla L, Passos EP, Paz AH. Comparison of human mesenchymal stromal cells from four neonatal tissues: Amniotic membrane, chorionic membrane, placental decidua and umbilical cord. Cytotherapy 2017; 19:577-585. [PMID: 28343898 DOI: 10.1016/j.jcyt.2017.03.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [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: 10/27/2016] [Revised: 01/31/2017] [Accepted: 03/02/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Mesenchymal stromal cells (MSCs) are being investigated as a potential alternative for cellular therapy. This study was designed to compare the biological characteristics of MSCs isolated from amniotic membrane (A-MSCs), chorionic membrane (C-MSCs), placental decidua (D-MSCs) and umbilical cord (UC-MSCs) to ascertain whether any one of these sources is superior to the others for cellular therapy purposes. METHODS MSCs were isolated from amniotic membrane, chorionic membrane, umbilical cord and placental decidua. Immunophenotype, differentiation ability, cell size, cell complexity, polarity index and growth kinetics of MSCs isolated from these four sources were analyzed. RESULTS MSCs were successfully isolated from all four sources. Surface marker profile and differentiation ability were consistent with human MSCs. C-MSCs in suspension were the smallest cells, whereas UC-MSCs presented the greatest length and least width. A-MSCs had the lowest polarity index and UC-MSCs, as more elongated cells, the highest. C-MSCs, D-MSCs and UC-MSCs exhibited similar growth capacity until passage 8 (P8); C-MSCs presented better lifespan, whereas insignificant proliferation was observed in A-MSCs. DISCUSSION Neonatal and maternal tissues can serve as sources of multipotent stem cells. Some characteristics of MSCs obtained from four neonatal tissues were compared and differences were observed. Amniotic membrane was the least useful source of MSCs, whereas chorionic membrane and umbilical cord were considered good options for future use in cell therapy because of the known advantages of immature cells.
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Affiliation(s)
- Anelise Bergmann Araújo
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
| | - Gabrielle Dias Salton
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Juliana Monteiro Furlan
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Melissa Helena Angeli
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Álvaro Macedo Laureano
- Cellular Technology and Therapy Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Lúcia Silla
- Cellular Technology and Therapy Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Ana Helena Paz
- Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Araújo AB, Angeli MH, Salton GD, Furlan JM, Schmalfuss T, Röhsig LM. Absolute density of different sources of hematopoietic progenitor cells: Bone marrow, peripheral blood stem cell and umbilical cord blood. Cytotherapy 2016; 19:128-130. [PMID: 27856229 DOI: 10.1016/j.jcyt.2016.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 10/07/2016] [Indexed: 10/20/2022]
Affiliation(s)
- Anelise Bergmann Araújo
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Brazil.
| | - Melissa Helena Angeli
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Brazil
| | - Gabrielle Dias Salton
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Brazil
| | - Juliana Monteiro Furlan
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Brazil
| | - Tissiana Schmalfuss
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Brazil
| | - Liane Marise Röhsig
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Brazil
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Schneider N, Gonçalves FDC, Pinto FO, Lopez PLDC, Araújo AB, Pfaffenseller B, Passos EP, Cirne-Lima EO, Meurer L, Lamers ML, Paz AH. Dexamethasone and azathioprine promote cytoskeletal changes and affect mesenchymal stem cell migratory behavior. PLoS One 2015; 10:e0120538. [PMID: 25756665 PMCID: PMC4355407 DOI: 10.1371/journal.pone.0120538] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 01/23/2015] [Indexed: 12/13/2022] Open
Abstract
Glucocorticoids and immunosuppressive drugs are commonly used to treat inflammatory disorders, such as inflammatory bowel disease (IBD), and despite a few improvements, the remission of IBD is still difficult to maintain. Due to their immunomodulatory properties, mesenchymal stem cells (MSCs) have emerged as regulators of the immune response, and their viability and activation of their migratory properties are essential for successful cell therapy. However, little is known about the effects of immunosuppressant drugs used in IBD treatment on MSC behavior. The aim of this study was to evaluate MSC viability, nuclear morphometry, cell polarity, F-actin and focal adhesion kinase (FAK) distribution, and cell migratory properties in the presence of the immunosuppressive drugs azathioprine (AZA) and dexamethasone (DEX). After an initial characterization, MSCs were treated with DEX (10 μM) or AZA (1 μM) for 24 hrs or 7 days. Neither drug had an effect on cell viability or nuclear morphometry. However, AZA treatment induced a more elongated cell shape, while DEX was associated with a more rounded cell shape (P < 0.05) with a higher presence of ventral actin stress fibers (P < 0.05) and a decrease in protrusion stability. After 7 days of treatment, AZA improved the cell spatial trajectory (ST) and increased the migration speed (24.35%, P < 0.05, n = 4), while DEX impaired ST and migration speed after 24 hrs and 7 days of treatment (-28.69% and -25.37%, respectively; P < 0.05, n = 4). In conclusion, our data suggest that these immunosuppressive drugs each affect MSC morphology and migratory capacity differently, possibly impacting the success of cell therapy.
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Affiliation(s)
- Natália Schneider
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Fabiany da Costa Gonçalves
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Fernanda Otesbelgue Pinto
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Patrícia Luciana da Costa Lopez
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Anelise Bergmann Araújo
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Bianca Pfaffenseller
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Eduardo Pandolfi Passos
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Elizabeth Obino Cirne-Lima
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Luíse Meurer
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Marcelo Lazzaron Lamers
- Morphological Sciences Department, Health Basic Sciences Institute, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, CEP 90050-170, Porto Alegre, RS, Brazil
| | - Ana Helena Paz
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
- Morphological Sciences Department, Health Basic Sciences Institute, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, CEP 90050-170, Porto Alegre, RS, Brazil
- * E-mail:
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Massaú A, Martins C, Nachtigal GC, Araújo AB, Rossetti ML, Niel C, da Silva CMD. The high prevalence of Torque teno virus DNA in blood donors and haemodialysis patients in southern Brazil. Mem Inst Oswaldo Cruz 2013; 107:684-6. [PMID: 22850961 DOI: 10.1590/s0074-02762012000500017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Accepted: 01/11/2012] [Indexed: 12/26/2022] Open
Abstract
This study investigates the frequency of Torque teno virus (TTV) infection in 150 blood donors and 77 patients requiring haemodialysis in southern Brazil. Plasma samples were screened for TTV DNA using polymerase chain reaction (PCR). The prevalences of TTV among blood donors and patients requiring haemodialysis were 73.3% and 68.8%, respectively. The presence of TTV was correlated with age in the blood donors (p = 0.024). In haemodialysis patients, no association was found between TTV infection and the demographic parameters (age, sex and education), the duration of haemodialysis or a history of blood transfusion. This study is the first to evaluate the prevalence of TTV infection in Brazilian patients requiring haemodialysis.
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Affiliation(s)
- Aline Massaú
- Programa de Pós-graduação em Diagnóstico Genético e Molecula, Universidade Luterana do Brasil, Canoas, RS, Brasil, 92425-900
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Araújo AB, Berne MEA. Conventional serological performance in diagnosis of Chagas’ disease in southern Brazil. Braz J Infect Dis 2013; 17:174-8. [PMID: 23453943 PMCID: PMC9427338 DOI: 10.1016/j.bjid.2012.10.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 10/01/2012] [Indexed: 11/11/2022] Open
Abstract
Results of Chagas’ disease diagnosis show disagreement. The aim of this study was to compare commercial tests for Chagas’ disease serodiagnosis in southern Brazil. A total of 161 samples were evaluated. Three enzyme-linked immunosorbent assays, one indirect hemagglutination and one indirect immunofluorescence were assessed. Trypomastigote excreted-secreted antigen-blot was a confirmatory method. From 161 samples, 65.84% were positive in all tests, while 34.16% presents mismatch result in at least one of the tests. All techniques tested presented false-positive and/or false-negative results as follows: Enzyme-linked immunosorbent assay 1 had more false-positive results (lower specificity), indirect immunofluorescence had the highest rate of false-negative results (lower sensitivity), enzyme-linked immunosorbent assays had fewer false-negative results (higher sensitivity), while indirect hemagglutination showed no false-positive result (higher specificity). Knowing the characteristics of techniques make it possible to combine them and obtain more reliable diagnosis. Therefore, it seems useful to combine techniques for diagnosing this infection.
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Araújo AB, Castagno VD, Gallina T, Berne MEA. [Prevalence of Chagas disease among pregnant women in the southern region of Rio Grande do Sul]. Rev Soc Bras Med Trop 2010; 42:732-3. [PMID: 20209365 DOI: 10.1590/s0037-86822009000600024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Accepted: 09/24/2009] [Indexed: 11/22/2022] Open
Abstract
Anti-Trypanosoma cruzi antibodies in the umbilical cord of 351 parturients in the city of Pelotas, Rio Grande do Sul were investigated to determine the prevalence of Chagas disease among pregnant women. One case was identified (0.3%), without detection of congenital transmission. This highlights the importance of investigating Chagas disease among pregnant women living in or originating from endemic areas.
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Barbosa CS, Araújo AB, Miranda D. [Incidence of primary benign and malignant neoplasms and bone pseudotumoral lesions. An epidemiologic analysis of 585 cases diagnosed at the Faculdade de Medicina of the Universidade Federal de Minas Gerais]. AMB Rev Assoc Med Bras 1991; 37:187-92. [PMID: 1668626] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The authors present an epidemiological study of 585 primary bone neoplasms and tumor-like lesions in order to investigate their incidence and distribution according to age, sex and skeletal location. A statistical agreement between the pertinent literature and the collected data was found. In this series, the most common benign neoplasms were the osteochondroma (45.3%) followed by chondroma (19.6%). Among the intermediate and malignant neoplasms, osteosarcoma was the most frequent (30.0%) followed by myeloma (16.0%). Fibrous dysplasia accounted for 46.6% of all tumor-like lesions, followed by solitary bone cyst (18.6%).
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Affiliation(s)
- C S Barbosa
- Dep. de Anat. Patol. Fac. de Med. da Univ. Fed. de Minas Gerais
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