1
|
Castro SJ, Castro AB, Araújo NM, Abreu VHR, Oliveira ML, Fadini RF. The pollination ecology of a rare case of bee-pollinated Psittacanthus mistletoe. Plant Biol (Stuttg) 2023; 25:1091-1100. [PMID: 37850399 DOI: 10.1111/plb.13584] [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] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 09/18/2023] [Indexed: 10/19/2023]
Abstract
The genus Psittacanthus (Loranthaceae) is widely distributed in the Neotropical region, where it is known for its large, colourful, scentless flowers. Until very recently, all Psittacanthus species were regarded as exclusively hummingbird-pollinated and the large species radiation in the genus attributed to the interactions with bird dispersers and pollinators. P. eucalyptifolius (Kunth) G.Don. is the only species reported as bee-pollinated. Here we describe the floral biology, floral visitors, and the reproductive system of P. eucalyptifolius in an Amazonian savanna, Brazil. We also compare the pollination success (reproductive performance) among different Psittacanthus species reported in previous studies. Psittacanthus eucalyptifolius produces sweet-scented flowers, and a small quantity of concentrated nectar. At least five species of scopate bees were recorded visiting and carrying pollen of P. eucalyptifolius. Xylocopa frontalis carried most pollen, visited more flowers, remained longer, and touched reproductive parts of flowers in >95% of the observed visits. Experiments indicate that P. eucalyptifolius is partially autocompatible (39% autonomous pollination) but depends on pollinators to achieve higher performance (~78% in control), indicating that bees can be as effective as birds in pollinating this group of mistletoes.
Collapse
Affiliation(s)
- S J Castro
- Programa de Pós-Graduação em Recursos Naturais da Amazônia, Universidade Federal do Oeste do Pará, Santarém, PA, Brazil
- Instituto de Biodiversidade e Florestas, Universidade Federal do Oeste do Pará, R. Vera Paz, Santarém, PA, Brazil
| | - A B Castro
- Instituto de Biodiversidade e Florestas, Universidade Federal do Oeste do Pará, R. Vera Paz, Santarém, PA, Brazil
- Programa de Pós-Graduação em Ecologia, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brazil
| | - N M Araújo
- Instituto de Biodiversidade e Florestas, Universidade Federal do Oeste do Pará, R. Vera Paz, Santarém, PA, Brazil
| | - V H R Abreu
- Instituto de Biodiversidade e Florestas, Universidade Federal do Oeste do Pará, R. Vera Paz, Santarém, PA, Brazil
- Departamento de Biologia, Centro de Ciências Exatas, Naturais e da Saúde, Universidade Federal do Espírito Santo, Alegre, ES, Brazil
| | - M L Oliveira
- Instituto Nacional de Pesquisas da Amazônia, Coordenação de Biodiversidade, Av. André Araújo, Manaus, AM, Brazil
| | - R F Fadini
- Programa de Pós-Graduação em Recursos Naturais da Amazônia, Universidade Federal do Oeste do Pará, Santarém, PA, Brazil
- Instituto de Biodiversidade e Florestas, Universidade Federal do Oeste do Pará, R. Vera Paz, Santarém, PA, Brazil
| |
Collapse
|
2
|
Bulbol MM, Schoeninger K, Oliveira ML, Somavilla A. A Synopsis of Knowledge of the Rhopalosomatidae (Hymenoptera) in Brazil: an Annotated Checklist of the Family in the Country, with a Revised Key to the Brazilian Genera. Neotrop Entomol 2023; 52:899-908. [PMID: 37603231 DOI: 10.1007/s13744-023-01066-w] [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] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/29/2023] [Indexed: 08/22/2023]
Abstract
This study is focused on the cricket leeches, Rhopalosomatidae, a family that is only poorly represented in entomological collections in Brazil. We provided a revised and updated key to the genera occurring in Brazil with the major traits of genera illustrated through high-resolution photomicrography. Also, we provided a synopsis of genera, a list of the species currently recorded from Brazil, the first country records for Rhopalosoma minus Townes, 1977 and Rhopalosoma breelandi Townes, 1977, which increases the diversity of these wasps in the country. Additionally, we provided information and a brief discussion about collection methods, flotation, and abundance of specimens collected. Maps with the geographical distribution of the studied species based on the previous and new records are also provided.
Collapse
Affiliation(s)
- M M Bulbol
- Laboratório de Hymenoptera, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil.
| | - K Schoeninger
- Instituto Biológico, Centro Avançado de Pesquisa e Desenvolvimento em Sanidade Agropecuária, Campinas, São Paulo, Brazil
| | - M L Oliveira
- Laboratório de Hymenoptera, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | - A Somavilla
- Laboratório de Hymenoptera, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| |
Collapse
|
3
|
Oliveira ML, Mello BP, Gonella-Diaza AM, Scolari SC, Pugliesi G, Martins T, Feltrin IR, Sartori R, Canavessi AMO, Binelli M, Membrive CMB. Unravelling the role of 17β-estradiol on advancing uterine luteolytic cascade in cattle. Domest Anim Endocrinol 2022; 78:106653. [PMID: 34455235 DOI: 10.1016/j.domaniend.2021.106653] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 03/19/2021] [Revised: 07/21/2021] [Accepted: 07/27/2021] [Indexed: 01/10/2023]
Abstract
In cattle, 17β-estradiol (E2) stimulates prostaglandin F2α (PGF2α) synthesis, which causes luteolysis. Except for the well-established upregulation of oxytocin receptor gene (OXTR), molecular mechanisms of E2-induced PGF2α release in vivo remain unknown. We hypothesized that E2-induced PGF2α release requires de novo transcription of components of the PGF2α synthesis machinery. Beef cows (n = 52) were assigned to remain untreated (Control; n = 10), to receive 50% ethanol infusion intravenously (Placebo; n = 21), or 3 mg E2 in 50% ethanol infusion intravenously (Estradiol; n = 21) on day 15 (D15) after estrus. We collected a single endometrial biopsy per animal at the time of the treatment (0h; Control B0h group), 4 hours (4h; Placebo B4h group and Estradiol B4h group), or 7 hours (7h; Placebo B7h group and Estradiol B7h group) post-treatment. Compared to the Placebo group, the Estradiol group presented significantly greater 13,14-dihydro-15-keto-PGF2α concentrations between 4h and 7h and underwent earlier luteolysis. At 4h, the qPCR analysis showed a lower abundance of ESR1, ESR2 and aldo-keto reductase family 1 member B1 (AKR1B1) genes in the Estradiol B4h group, and a greater abundance of OXTR compared to the Placebo B4h group. Similarly, the E2 treatment significantly reduced the abundance of AKR1B1, and AKR1C4 in the Estradiol B7h group, compared to the placebo group. Overall, E2-induced PGF2α release and luteolysis involved an unexpected and transient downregulation of components of the PGF2α-synthesis cascade, except for OXTR, which was upregulated. Collectively, our data suggest that E2 connects newly-synthesized OXTR to pre-existing cellular machinery to synthesize PGF2α and cause luteal regression.
Collapse
Affiliation(s)
- M L Oliveira
- Agrarian Sciences Center, State University of Maranhão Tocantine Region, 1300 Godofredo Viana St, Center, Imperatriz - MA, 65900-000, Brazil..
| | - B P Mello
- Department of Animal Reproduction, University of São Paulo, 225 Duque de Caxias Norte Ave, Pirassununga - SP, 13635900, Brazil
| | - A M Gonella-Diaza
- North Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, 3925 FL-71, Greenwood, FL 32443, USA
| | - S C Scolari
- Department of Animal Reproduction, University of São Paulo, 225 Duque de Caxias Norte Ave, Pirassununga - SP, 13635900, Brazil
| | - G Pugliesi
- Department of Animal Reproduction, University of São Paulo, 225 Duque de Caxias Norte Ave, Pirassununga - SP, 13635900, Brazil
| | - T Martins
- Department of Animal Sciences, University of Florida, 2250 Shealy Dr, Gainesville, FL 32611, USA
| | - I R Feltrin
- Department of Pharmacology and Biotechnology, São Paulo State University, Rubião Júnior District no number, Botucatu-SP, 18618-970, Brazil
| | - R Sartori
- Department of Animal Science, Luiz de Queiroz College of Agriculture, University of São Paulo, 11, Pádua Dias Ave, Piracicaba-SP, 13418900, Brazil
| | - A M O Canavessi
- Department of Animal Science, Luiz de Queiroz College of Agriculture, University of São Paulo, 11, Pádua Dias Ave, Piracicaba-SP, 13418900, Brazil
| | - M Binelli
- Department of Animal Sciences, University of Florida, 2250 Shealy Dr, Gainesville, FL 32611, USA
| | - C M B Membrive
- Department of Animal Sciences, São Paulo State University, 294-SP Commander João Ribeiro de Barros, 651 Road, Dracena-SP, 17900000, Brazil
| |
Collapse
|
4
|
Nogueira DS, Rasmussen C, Oliveira ML. A New Species of Tetragona Lepeletier & Serville, 1828 from the "truncata group" and New Distribution Records of T. truncata Moure, 1971 (Hymenoptera: Apidae). Neotrop Entomol 2021; 50:68-77. [PMID: 33245548 DOI: 10.1007/s13744-020-00822-6] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
Tetragona Lepeletier & Serville is a genus of stingless bees with 14 recognized species occurring from Mexico to Argentina. The genus is characterized by velvety genal area, mesotibial spur present, and propodeal triangle glabrous. Within the genus, the truncata species group (T. truncata Moure and T. atahualpa sp. nov.) is characterized by worker metabasitarsus with posterior angle rounded and the mandible with two short teeth of similar length. Tetragona truncata is reported with new records for Ecuador (Napo and Orellana), Peru (Huánuco, Loreto, and San Martín), and Brazil (Acre [Rio Branco] and Tocantins [Itacá, Lizarda and Palmas]). In addition, T. atahualpa sp. nov. is described as a new species from regions of altitudes above 1,800 m in Colombia (Boyacá), Ecuador (Napo, Zamora-Chinchipe), and Peru (Pasco). We illustrate and discuss the identification of these two species.
Collapse
Affiliation(s)
- D S Nogueira
- Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, São Gabriel da Cachoeira, AM, Brasil.
- Programa de Pós Graduação em Entomologia, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brasil.
| | - C Rasmussen
- Dept of Agroecology, Aarhus Univ, Aarhus, Denmark
| | - M L Oliveira
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brasil
| |
Collapse
|
5
|
Garcia EG, Veloso A, Oliveira ML, Allen JR, Loontiens S, Brunson D, Do D, Yan C, Morris R, Iyer S, Garcia SP, Iftimia N, Van Loocke W, Matthijssens F, McCarthy K, Barata JT, Speleman F, Taghon T, Gutierrez A, Van Vlierberghe P, Haas W, Blackburn JS, Langenau DM. PRL3 enhances T-cell acute lymphoblastic leukemia growth through suppressing T-cell signaling pathways and apoptosis. Leukemia 2020; 35:679-690. [PMID: 32606318 PMCID: PMC8009053 DOI: 10.1038/s41375-020-0937-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 09/04/2019] [Revised: 06/10/2020] [Accepted: 06/16/2020] [Indexed: 01/06/2023]
Abstract
T cell acute lymphoblastic leukemia (T-ALL) is an aggressive malignancy of thymocytes and is largely driven by the NOTCH/MYC pathway. Yet, additional oncogenic drivers are required for transformation. Here, we identify protein tyrosine phosphatase type 4 A3 (PRL3) as a collaborating oncogenic driver in T-ALL. PRL3 is expressed in a large fraction of primary human T-ALLs and is commonly co-amplified with MYC. PRL3 also synergized with MYC to initiate early-onset ALL in transgenic zebrafish and was required for human T-ALL growth and maintenance. Mass spectrometry phosphoproteomic analysis and mechanistic studies uncovered that PRL3 suppresses downstream T cell phosphorylation signaling pathways, including those modulated by VAV1, and subsequently suppresses apoptosis in leukemia cells. Taken together, our studies have identified new roles for PRL3 as a collaborating oncogenic driver in human T-ALL and suggest that therapeutic targeting of the PRL3 phosphatase will likely be a useful treatment strategy for T-ALL.
Collapse
Affiliation(s)
- E G Garcia
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - A Veloso
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - M L Oliveira
- Instituto de Medicina Molecular João Lobo Antunes Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - J R Allen
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - S Loontiens
- Cancer Research Institute Ghent, Ghent, Belgium
| | - D Brunson
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - D Do
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - C Yan
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - R Morris
- Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA
| | - S Iyer
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - S P Garcia
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - N Iftimia
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - W Van Loocke
- Cancer Research Institute Ghent, Ghent, Belgium.,Department of Biomolecular Medicine and Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - F Matthijssens
- Cancer Research Institute Ghent, Ghent, Belgium.,Department of Biomolecular Medicine and Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - K McCarthy
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - J T Barata
- Instituto de Medicina Molecular João Lobo Antunes Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - F Speleman
- Cancer Research Institute Ghent, Ghent, Belgium.,Department of Biomolecular Medicine and Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - T Taghon
- Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
| | - A Gutierrez
- Division of Hematology/Oncology, Boston Children's Hospital and Dana-Farber Cancer Institute, Boston, USA
| | - P Van Vlierberghe
- Cancer Research Institute Ghent, Ghent, Belgium.,Department of Biomolecular Medicine and Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - W Haas
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA.,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA.,Harvard Stem Cell Institute, Boston, MA, 02114, USA.,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA
| | - J S Blackburn
- Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY, 40536, USA
| | - D M Langenau
- Department of Pathology, Massachusetts General Research Institute, Boston, MA, 02114, USA. .,Center of Cancer Research, Massachusetts General Hospital, Charlestown, MA, 02129, USA. .,Harvard Stem Cell Institute, Boston, MA, 02114, USA. .,Center of Regenerative Medicine, Massachusetts General Hospital, Boston, MA, 02114, USA.
| |
Collapse
|
6
|
Williams KA, Bartholomay PR, Cambra RA, Oliveira ML. Review of Leucospilomutilla Ashmead and Description of the New Genus Atlantilla (Hymenoptera: Mutillidae). Neotrop Entomol 2020; 49:82-97. [PMID: 31808074 DOI: 10.1007/s13744-019-00723-3] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/22/2019] [Indexed: 06/10/2023]
Abstract
The new genus Atlantilla Williams & Bartholomay, gen. nov. (type species Mutilla auriculata Gerstaecker, 1874), is proposed based on the combination of previously undescribed males from the Atlantic Forest and females of Traumatomutilla auriculata (Gerstaecker, Arch Naturgesch 40:41-77, 1874). This genus is similar to Leucospilomutilla Ashmead, 1903, which is also reviewed here. The previously unknown male of L. staurogastra Suárez, 1973 is described. Keys and illustrations are provided for each of the three known Leucospilomutilla species.
Collapse
Affiliation(s)
- K A Williams
- Plant Pest Diagnostics Center, California Department of Food and Agriculture, Sacramento, CA, USA.
| | - P R Bartholomay
- Instituto de Pesquisas da Amazônia, Manaus, Amazonas, Brasil
| | - R A Cambra
- Museo de Invertebrados G. B. Fairchild, Estafeta Universitaria Apartado 00017, Univ de Panamá, Panama City, Republic of Panama
| | - M L Oliveira
- Instituto de Pesquisas da Amazônia, Manaus, Amazonas, Brasil
| |
Collapse
|
7
|
Pecego AC, Amâncio RT, Costa DM, Bozza FA, Siqueira MM, Oliveira ML, Cerbino-Neto J, Japiassu A. Etiology, clinical, and epidemiological characteristics of severe respiratory infection in people living with HIV. Int J STD AIDS 2020; 31:100-108. [PMID: 31969059 PMCID: PMC7206327 DOI: 10.1177/0956462419882587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
People living with HIV (PLWH) are more prone to severe respiratory infections. We used the severe acute respiratory infection (SARI) definition to describe the etiology, clinical, and epidemiological characteristics in this population. This was a prospective observational study including PLWH hospitalized with fever and cough. Those with symptom onset up to 10 days were classified as severe acute respiratory infection and 11–30 days as non-severe acute respiratory infection. Blood, urine samples and nasopharyngeal swabs were collected. Data were extracted from patient charts during their hospital stay. Forty-nine patients were included, median CD4 cell count: 80 cells/mm3, median time since HIV diagnosis and hospital admission: 84 months and 80% were antiretroviral therapy exposed. Twenty-seven patients were classified as SARI. Etiology was identified in 69%, 47% were polymicrobial. Respiratory virus (9 SARI vs. 13 non-SARI), bacteria (5 SARI vs. 4 non-SARI), Mycobacterium tuberculosis (6 SARI group vs. 7 non-SARI group), Pneumocystis jirovecii (4 SARI vs. 1 non-SARI), Cryptococcus neoformans (1 SARI vs. 3 non-SARI), and influenza A (1 SARI vs. 2 non-SARI). Dyspnea was statistically more prevalent in SARI (78% vs. 36%, p = 0.011) but the risk of death was higher in the non-SARI (4% vs. 36%, p = 0.0067). In the severely immunocompromised PLWH, severe acute respiratory infection can be caused by multiple pathogens and codetection is a common feature.
Collapse
Affiliation(s)
- AC Pecego
- Instituto Nacional de Infectologia – Fundação Oswaldo Cruz (Fiocruz) – Laboratório de Medicina Intensiva, Rio de Janeiro, Brazil
- AC Pecego, Instituto Nacional de Infectologia (INI), FIOCRUZ, Av Brasil 4365, Manguinhos, Rio de Janeiro, RJ, Brazil.
| | - RT Amâncio
- Instituto Nacional de Infectologia – Fundação Oswaldo Cruz (Fiocruz) – Laboratório de Medicina Intensiva, Rio de Janeiro, Brazil
| | - DM Costa
- Instituto Nacional de Infectologia – Fundação Oswaldo Cruz (Fiocruz) – Laboratório de Medicina Intensiva, Rio de Janeiro, Brazil
| | - FA Bozza
- Instituto Nacional de Infectologia – Fundação Oswaldo Cruz (Fiocruz) – Laboratório de Medicina Intensiva, Rio de Janeiro, Brazil
- Instituto D’Or de Pesquisa e Ensino, Rio de Janeiro, Brazil
| | - MM Siqueira
- Instituto Oswaldo Cruz – Fiocruz – Laboratório de Vírus Respiratório, do IOC/FIOCRUZ, Rio de Janeiro, Brazil
| | - ML Oliveira
- Instituto Oswaldo Cruz – Fiocruz – Laboratório de Vírus Respiratório, do IOC/FIOCRUZ, Rio de Janeiro, Brazil
| | - J Cerbino-Neto
- Laboratório de Pesquisa em Imunização e Vigilância em Saúde, Rio de Janeiro, Brazil
| | - A Japiassu
- Instituto Nacional de Infectologia – Fundação Oswaldo Cruz (Fiocruz) – Laboratório de Medicina Intensiva, Rio de Janeiro, Brazil
| |
Collapse
|
8
|
Batista EOS, Cardoso BO, Oliveira ML, Cuadros FDC, Mello BP, Sponchiado M, Monteiro BM, Pugliesi G, Binelli M. Supplemental progesterone induces temporal changes in luteal development and endometrial transcription in beef cattle. Domest Anim Endocrinol 2019; 68:126-134. [PMID: 31082784 DOI: 10.1016/j.domaniend.2019.02.001] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 02/05/2019] [Accepted: 02/07/2019] [Indexed: 11/19/2022]
Abstract
Long-acting injectable progesterone (iP4) supplementation during early diestrus is a strategy to increase conception rates in cow-calf beef operations. However, iP4 treatment causes early functional and structural regression of the corpus luteum (CL) in a proportion of iP4-treated animals, resulting in pregnancy loss. The hypothesis evaluated was that iP4 accelerates downregulation of sex-steroid receptors (PGR, ESR1, ESR2) during early to mid-diestrus and the upregulation of genes controlling PGF2α secretion (OXTR, PTGS2, AKR1B1) during late diestrus in the endometrium. Ovulations of cyclic, multiparous Nelore (Bos indicus) cows were synchronized, and cows were divided to receive placebo or 300 mg iP4 3 d postovulation (D3). Growth and vascularization of luteal tissue were evaluated by ultrasonography. Blood samples were collected from 3 d postovulation to 3 d after luteolysis, and P4 plasma concentrations were measured by radioimmunoassay. On days 3, 5, 7, 9, 11, 13, and 16 luminal endometrial samples were taken using a cytologic brush. Transcript abundance was measured by qPCR. Structural luteolysis occurred 3 d earlier in cows receiving iP4 compared to the control group. Analyzing only cows that received iP4, those that presented early luteolysis (ie, ≤ D16) showed a decrease in CL area and P4 concentration after D5, compared to the control group. Cows that presented early luteolysis showed a reduced abundance of transcripts on D5 for the ESR2 gene and a greater abundance of transcripts for OXTR and ESR1 on D16, compared to cows that did not present early luteolysis. The iP4-induced early luteolysis can be explained by two nonexclusive possibilities: the activation of uterine mechanisms that trigger early secretion of endometrial PGF pulses and the formation of a subfunctional CL that is prone to early regression.
Collapse
Affiliation(s)
- E O S Batista
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - B O Cardoso
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - M L Oliveira
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - F D C Cuadros
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - B P Mello
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - M Sponchiado
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - B M Monteiro
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - G Pugliesi
- Departament of Animal Reprodution, FMVZ-USP, Pirassununga, SP, Brazil
| | - M Binelli
- Department of Animal Sciences, University of Florida, Gainesville, United States.
| |
Collapse
|
9
|
Brito TF, Santos ACS, Maués MM, Silveira OT, Oliveira ML. Historical records of orchid bees (Apidae: Euglossini) in Belém Endemism Center: species list of 92 years sampling. BRAZ J BIOL 2018; 79:263-272. [PMID: 30110081 DOI: 10.1590/1519-6984.180139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 10/17/2017] [Indexed: 11/22/2022] Open
Abstract
The distribution of most species occurs in delimited regions with unique characteristics called "centers of endemism". In Eastern Amazon is located the Belém Endemism Center (BEC), one of the most intensely deforested in Brazilian Amazon. Here, we show information about orchid bee assemblages based on historical records from entomological collections. For each species, we calculated occurrence frequency and dominance, and we classified them in 3 statuses: common, intermediate or rare species. Curves of observed and estimated richness were built, based on Jackknife estimator. We found 1,257 specimens from 56 species, constituting records from 1917 to 2009, and one species is a new record for BEC. Higher number of specimens and species was concentrated in a few locations and surveys increased from the 70's. The results suggest a high richness of orchid bees in the BEC, although this scenario is far from what is expected for the entire area. The high occurrence of rare species may be related to their low representativeness in the collections, and the proximity between the areas had favored samplings. Even so, the species list and the conservation status presented here may be useful information in studies comparing past and current orchid bee fauna, and, allied to data on bees' responses to land use changes occurred in BEC over the years, can fit as a basis for defining priority areas for conservation.
Collapse
Affiliation(s)
- T F Brito
- Laboratório de Biologia e Ecologia de Abelhas, Programa de Pós-graduação em Zoologia, Museu Paraense Emílio Goeldi - MPEG, Instituto de Ciências Biológicas, Universidade Federal do Pará - UFPA, Av. Perimetral, 2224, Guamá, CEP 66075-110, Belém, PA, Brasil
| | - A C S Santos
- Laboratório de Entomologia, Embrapa Amazônia Oriental, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Trav. Doutor Enéas Pinheiro, s/n, Marco, CEP 66095-903, Belém, PA, Brasil
| | - M M Maués
- Laboratório de Entomologia, Embrapa Amazônia Oriental, Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA, Trav. Doutor Enéas Pinheiro, s/n, Marco, CEP 66095-903, Belém, PA, Brasil
| | - O T Silveira
- Coleção de Invertebrados, Coordenação de Zoologia, Museu Paraense Emilio Goeldi - MPEG, Av. Perimetral, 1901/1907, Campus de Pesquisa, Terra Firme, CEP 66017-970, Belém, PA, Brasil
| | - M L Oliveira
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia - INPA, Av. André Araújo, nº 2936, Petrópolis, CEP 69067-375, Manaus, AM, Brasil
| |
Collapse
|
10
|
Cavallo IK, Dela Cruz C, Oliveira ML, Del Puerto HL, Dias JA, Lobach VN, Casalechi M, Camargos MG, Reis AM, Santos RA, Reis FM. Angiotensin-(1-7) in human follicular fluid correlates with oocyte maturation. Hum Reprod 2018; 32:1318-1324. [PMID: 28402544 DOI: 10.1093/humrep/dex072] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 03/27/2017] [Indexed: 12/19/2022] Open
Abstract
STUDY QUESTION Do angiotensin (Ang)-(1-7) levels in human ovarian follicular fluid (FF) correlate with the number and proportion of mature oocytes obtained for IVF? SUMMARY ANSWER The present study shows for the first time that Ang-(1-7) levels in human FF correlate with the proportion of mature oocytes collected upon ovarian stimulation for IVF. WHAT IS KNOWN ALREADY Ang-(1-7) is an active peptide of the renin-angiotensin system that stimulates oocyte maturation in isolated rabbit and rat ovaries. However, its role in human ovulation remains unexplored. STUDY DESIGN, SIZE, DURATION This was a prospective cohort study including 64 participants from a single IVF center. Sample size was calculated to achieve a statistical power of 80% in detecting 20% differences in the proportion of mature oocytes between groups. The participants were enrolled in the study during six consecutive months. PARTICIPANTS/MATERIALS, SETTING, METHODS Plasma samples were obtained from all subjects at Day 21 of the last menstrual cycle before starting pituitary blockade and controlled ovarian stimulation (COS). Plasma and FF samples were quickly mixed with a protease inhibitor cocktail and stored at -80°C. Ang-(1-7) was quantified in plasma and FF samples by a highly sensitive and specific radioimmunoassay, which was preceded by solid phase extraction, speed vacuum concentration and sample reconstitution in assay buffer. FF Ang-(1-7) levels were stratified into tertiles and the patients of each tertile were compared for COS/IVF outcomes using Kruskal-Wallis ANOVA. Multiple regression analysis was used to adjust correlations for potential confounders. The mRNA encoding for Mas, a receptor for Ang-(1-7), was investigated by real-time PCR in luteinized granulosa cells purified from the FF. MAIN RESULTS AND THE ROLE OF CHANCE There was a four-fold increase in plasma Ang-(1-7) after ovulation induction (median 160.9 vs 41.4 pg/ml, P < 0.0001). FF Ang-(1-7) levels were similar to (169.9 pg/ml) but did not correlate with plasma Ang-(1-7) levels (r = -0.05, P = 0.665). Patients at the highest FF Ang-(1-7) tertile had a higher proportion of mature oocytes compared to patients at the lower FF Ang-(1-7) tertile (median 100% vs 70%, P < 0.01). There was a linear correlation between FF Ang-(1-7) and the proportion of mature oocytes (r = 0.380, P < 0.01), which remained significant after adjustment for age and duration of infertility (r = 0.447, P < 0.001). The luteinized granulosa cells expressed Mas receptor mRNA, which was positively correlated to the number of mature oocytes in women with more than three mature oocytes retrieved (r = 0.42, P < 0.01). LIMITATIONS, REASONS FOR CAUTION This is an observational study, therefore, no causal relationship can be established between Ang-(1-7) and human oocyte maturation. Mas protein expression was not quantified due to limited availability of granulosa cells. WIDER IMPLICATIONS OF THE FINDINGS Since this peptide promotes oocyte maturation in other species, it deserves further investigation as a potential maturation factor to human oocytes. STUDY FUNDING AND COMPETING INTEREST(S) Research supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG). The authors have nothing to disclose.
Collapse
Affiliation(s)
- Ines K Cavallo
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Cynthia Dela Cruz
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Marilene L Oliveira
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Helen L Del Puerto
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Júlia A Dias
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Veronica N Lobach
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Maíra Casalechi
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Maria G Camargos
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| | - Adelina M Reis
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Robson A Santos
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 31270-901, Brazil
| | - Fernando M Reis
- Division of Human Reproduction, Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Av. Alfredo Balena 110-9o andar, Belo Horizonte, MG 30130-100, Brazil
| |
Collapse
|
11
|
Cardoso B, Oliveira ML, Pugliesi G, Batista E, Binelli M. Cytobrush: A tool for sequential evaluation of gene expression in bovine endometrium. Reprod Domest Anim 2017; 52:1153-1157. [PMID: 28755420 DOI: 10.1111/rda.13037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 06/18/2017] [Indexed: 11/29/2022]
Abstract
Aims were to (i) compare specific transcript abundance between endometrial samples collected by transcervical biopsy and cytobrush and (ii) measure the abundance of endometrial transcripts involved in PGF2α synthesis in samples collected by cytobrush. In Experiment 1, endometrial samples were taken transcervically by cytobrush and biopsy 10 days after ovulation. Compared to biopsy samples, abundance of transcripts for MSTN, AKR1C4 and PGR was similar, VIM, FLT1 and PTGES was lower (p < .05) and KRT18 and CD3D was greater in cytobrush samples (p < .05). Thus, there was an enrichment of epithelial and immune cells in the cytobrush samples. In Experiment 2, endometrial samples were collected by cytobrush on days 10, 13, 16 and 19 after ovulation. Abundance of PGR2 mRNA was maximum on day 10 then decreased (p < .05). Abundance of ESR1 decreased gradually from day 10 to day 16 then increased again on day 19. The greatest abundance of OXTR was noted on day 19. The sequential alterations in abundance of these transcripts are consistent with the release of PGF2α associated with luteolysis. In summary, cytobrush sampling provides representative, physiologically relevant samples of the luminal epithelium in cattle.
Collapse
Affiliation(s)
- B Cardoso
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - M L Oliveira
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - G Pugliesi
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Eos Batista
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - M Binelli
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| |
Collapse
|
12
|
Caldas JR, Panerai RB, Bor-Seng-Shu E, Almeida JP, Ferreira GSR, Camara L, Nogueira RC, Oliveira ML, Jatene FB, Robinson TG, Hajjar LA. Cerebral hemodynamics with intra-aortic balloon pump: business as usual? Physiol Meas 2017; 38:1349-1361. [PMID: 28333037 DOI: 10.1088/1361-6579/aa68c4] [Citation(s) in RCA: 2] [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] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Intra-aortic balloon pump (IABP) is commonly used as mechanical support after cardiac surgery or cardiac shock. Although its benefits for cardiac function have been well documented, its effects on cerebral circulation are still controversial. We hypothesized that transfer function analysis (TFA) and continuous estimates of dynamic cerebral autoregulation (CA) provide consistent results in the assessment of cerebral autoregulation in patients with IABP. APPROACH Continuous recordings of blood pressure (BP, intra-arterial line), end-tidal CO2, heart rate and cerebral blood flow velocity (CBFV, transcranial Doppler) were obtained (i) 5 min with IABP ratio 1:3, (ii) 5 min, starting 1 min with the IABP-ON, and continuing for another 4 min without pump assistance (IABP-OFF). Autoregulation index (ARI) was estimated from the CBFV response to a step change in BP derived by TFA and as a function of time using an autoregressive moving-average model during removal of the device (ARI t ). Critical closing pressure and resistance area-product were also obtained. MAIN RESULTS ARI with IABP-ON (4.3 ± 1.2) were not different from corresponding values at IABP-OFF (4.7 ± 1.4, p = 0.42). Removal of the balloon had no effect on ARI t , CBFV, BP, cerebral critical closing pressure or resistance area-product. SIGNIFICANCE IABP does not disturb cerebral hemodynamics. TFA and continuous estimates of dynamic CA can be used to assess cerebral hemodynamics in patients with IABP. These findings have important implications for the design of studies of critically ill patients requiring the use of different invasive support devices.
Collapse
Affiliation(s)
- J R Caldas
- Department of Anesthesia, University of São Paulo, São Paulo, Brazil. Department of Neurosurgery, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Caldas JR, Panerai RB, Haunton VJ, Almeida JP, Ferreira GSR, Camara L, Nogueira RC, Bor-Seng-Shu E, Oliveira ML, Groehs RRV, Ferreira-Santos L, Teixeira MJ, Galas FRBG, Robinson TG, Jatene FB, Hajjar LA. Cerebral blood flow autoregulation in ischemic heart failure. Am J Physiol Regul Integr Comp Physiol 2016; 312:R108-R113. [PMID: 27927624 DOI: 10.1152/ajpregu.00361.2016] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [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: 08/23/2016] [Revised: 12/01/2016] [Accepted: 12/01/2016] [Indexed: 12/24/2022]
Abstract
Patients with ischemic heart failure (iHF) have a high risk of neurological complications such as cognitive impairment and stroke. We hypothesized that iHF patients have a higher incidence of impaired dynamic cerebral autoregulation (dCA). Adult patients with iHF and healthy volunteers were included. Cerebral blood flow velocity (CBFV, transcranial Doppler, middle cerebral artery), end-tidal CO2 (capnography), and arterial blood pressure (Finometer) were continuously recorded supine for 5 min at rest. Autoregulation index (ARI) was estimated from the CBFV step response derived by transfer function analysis using standard template curves. Fifty-two iHF patients and 54 age-, gender-, and BP-matched healthy volunteers were studied. Echocardiogram ejection fraction was 40 (20-45) % in iHF group. iHF patients compared with control subjects had reduced end-tidal CO2 (34.1 ± 3.7 vs. 38.3 ± 4.0 mmHg, P < 0.001) and lower ARI values (5.1 ± 1.6 vs. 5.9 ± 1.0, P = 0.012). ARI <4, suggestive of impaired CA, was more common in iHF patients (28.8 vs. 7.4%, P = 0.004). These results confirm that iHF patients are more likely to have impaired dCA compared with age-matched controls. The relationship between impaired dCA and neurological complications in iHF patients deserves further investigation.
Collapse
Affiliation(s)
- J R Caldas
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil.,Department of Neurosurgery, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil
| | - R B Panerai
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom; .,Leicester National Institute for Health Research Biomedical Research Unit in Cardiovascular Disease, Glenfield Hospital, Leicester, United Kingdom
| | - V J Haunton
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom.,Leicester National Institute for Health Research Biomedical Research Unit in Cardiovascular Disease, Glenfield Hospital, Leicester, United Kingdom
| | - J P Almeida
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - G S R Ferreira
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - L Camara
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - R C Nogueira
- Department of Neurosurgery, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil.,Department of Neurology, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil; and
| | - E Bor-Seng-Shu
- Department of Neurosurgery, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil
| | - M L Oliveira
- Department of Neurosurgery, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil
| | - R R V Groehs
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - L Ferreira-Santos
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - M J Teixeira
- Department of Neurosurgery, Hospital das Clinicas, University of São Paulo, São Paulo, Brazil
| | - F R B G Galas
- Department of Anesthesia, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - T G Robinson
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom.,Leicester National Institute for Health Research Biomedical Research Unit in Cardiovascular Disease, Glenfield Hospital, Leicester, United Kingdom
| | - F B Jatene
- Department of Cardiopneumology, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - L A Hajjar
- Department of Cardiopneumology, Heart Institute, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
14
|
Vicari AR, Spuldaro F, Sandes-Freitas TV, Cristelli MP, Requião-Moura LR, Reusing JO, Pierrotti LC, Oliveira ML, Girão CM, Gadonski G, Kroth LV, Deboni LM, Ferreira GF, Tedesco-Silva H, Esmeraldo R, David-Neto E, Saitovitch D, Keitel E, Garcia VD, Pacheco-Silva A, Medina-Pestana JO, Manfro RC. Renal transplantation in human immunodeficiency virus-infected recipients: a case-control study from the Brazilian experience. Transpl Infect Dis 2016; 18:730-740. [PMID: 27503081 DOI: 10.1111/tid.12592] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 03/05/2016] [Revised: 05/27/2016] [Accepted: 06/24/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND Highly active antiretroviral therapy has turned human immunodeficiency virus (HIV)-infected patients with end-stage renal disease into suitable candidates for renal transplantation. We present the Brazilian experience with kidney transplantation in HIV-infected recipients observed in a multicenter study. METHODS HIV-infected kidney transplant recipients and matched controls were evaluated for the incidence of delayed graft function (DGF), acute rejection (AR), infections, graft function, and survival of patients and renal grafts. RESULTS Fifty-three HIV-infected recipients and 106 controls were enrolled. Baseline characteristics were similar, but a higher frequency of pre-transplant positivity for hepatitis C virus and cytomegalovirus infections was found in the HIV group. Immunosuppressive regimens did not differ, but a trend was observed toward lower use of anti-thymocyte globulin in the group of HIV-infected recipients (P = 0.079). The HIV-positive recipient group presented a higher incidence of treated AR (P = 0.036) and DGF (P = 0.044). Chronic Kidney Disease Epidemiology Collaboration estimated that glomerular filtration rate was similar at 6 months (P = 0.374) and at 12 months (P = 0.957). The median number of infections per patient was higher in the HIV-infected group (P = 0.018). The 1-year patient survival (P < 0.001) and graft survival (P = 0.004) were lower, but acceptable, in the group of HIV-infected patients. CONCLUSIONS In the Brazilian experience, despite somewhat inferior outcomes, kidney transplantation is an adequate therapy for selected HIV-infected recipients.
Collapse
Affiliation(s)
- A R Vicari
- Renal Transplant Unit, Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - F Spuldaro
- Renal Transplant Unit, Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - M P Cristelli
- Hospital do Rim, Federal University of São Paulo, São Paulo, SP, Brazil
| | - L R Requião-Moura
- Renal Transplant Unit, Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
| | - J O Reusing
- Renal Transplant Unit, Hospital das Clínicas de São Paulo, University of São Paulo, São Paulo, SP, Brazil
| | - L C Pierrotti
- Renal Transplant Unit, Hospital das Clínicas de São Paulo, University of São Paulo, São Paulo, SP, Brazil
| | - M L Oliveira
- Renal Transplant Unit, Hospital Geral de Fortaleza, Fortaleza, CE, Brazil
| | - C M Girão
- Renal Transplant Unit, Hospital Geral de Fortaleza, Fortaleza, CE, Brazil
| | - G Gadonski
- Renal Transplant Unit, Hospital São Lucas, Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - L V Kroth
- Renal Transplant Unit, Hospital São Lucas, Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - L M Deboni
- Hospital Municipal São José e Fundação Pró-Rim, Joinville, SC, Brazil
| | - G F Ferreira
- Hospital Santa Casa de Misericórdia de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - H Tedesco-Silva
- Hospital do Rim, Federal University of São Paulo, São Paulo, SP, Brazil
| | - R Esmeraldo
- Renal Transplant Unit, Hospital Geral de Fortaleza, Fortaleza, CE, Brazil
| | - E David-Neto
- Renal Transplant Unit, Hospital das Clínicas de São Paulo, University of São Paulo, São Paulo, SP, Brazil
| | - D Saitovitch
- Renal Transplant Unit, Hospital São Lucas, Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - E Keitel
- Renal Transplant Unit, Hospital Santa Casa de Porto Alegre, Federal University of Medical Sciences of Porto Alegre, Porto Alegre, RS, Brazil
| | - V D Garcia
- Renal Transplant Unit, Hospital Santa Casa de Porto Alegre, Federal University of Medical Sciences of Porto Alegre, Porto Alegre, RS, Brazil
| | - A Pacheco-Silva
- Renal Transplant Unit, Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
| | | | - R C Manfro
- Renal Transplant Unit, Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
| |
Collapse
|
15
|
Passos-Silva DG, Oliveira ML, Silva FA, Oliveira SF, Etelvino GM, Sampaio WO, Santos RA. Abstract P197: Differences in Renin-angiotensin System Components Expression in Tumoral and Normal Cell Lines. Hypertension 2016. [DOI: 10.1161/hyp.68.suppl_1.p197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Several reports have shown the actions of ACE/ AngII/AT1 axis in the development of malignancy and also predict that RAS inhibitors could potentiate cancer therapies. On the other hand, the alternative axis of renin angiotensin system, ACE2/Ang-(1-7)/Mas, demonstrated an anti-tumoral property. This anti-tumoral effect is not clear for the recently described components of RAS, Alamandine/MrgD. The aim of this work is to characterize the expression and the enzyme activities of the RAS components in different tumoral and normal cell lines. There was a significant increase in the expression of the components (ACE and AT2) related to the formation and actions of Ang II. ACE presented 1.8 A.U. and 1.4 A.U. in A549 and MIAPACA tumoral cell lines, respectively, in comparison with 0.6 A.U. of normal cell lines (VERO) (p< 0.05). On the other hand, there was reduction in ACE2 enzyme related to the formation of Angiotensin-(1-7) and Alamandine (0.25 A.U. in MIAPACA VS 1.7 A.U. in VERO, p<0.05), which are modulatory peptides of the actions of Angiotensin II. Furthermore, there is also a significant increase in both Mas (0.18 A.U. in A549 VS 0.12 A.U. in VERO, p<0.05) and MrgD receptors (85 ±6 A.U. in A549 and 73 ±5 A.U. in MIAPACA VS 11 ±3 A.U. in VERO, p<0.001) expression in tumoral cells. Additionally, to complete the data obtained by Western Blotting, the enzymatic activity of ACE and ACE2 was evaluated in tumor cells and in Vero cells used as control. ACE enzyme activity is increased in tumor cells, while the ACE2 is reduced (950 A.U. in VERO VS 500 A.U. MIAPACA and 450 A.U. A549 p<0.01). These data suggest that RAS proliferative axis is activated in tumor cells and anti -proliferative axis is decreased compared to control cells.
Collapse
|
16
|
Mesquita FS, Ramos RS, Pugliesi G, Andrade SCS, Van Hoeck V, Langbeen A, Oliveira ML, Gonella-Diaza AM, Gasparin G, Fukumasu H, Pulz LH, Membrive CM, Coutinho LL, Binelli M. Endometrial transcriptional profiling of a bovine fertility model by Next-Generation Sequencing. Genom Data 2016; 7:26-8. [PMID: 26981354 PMCID: PMC4778601 DOI: 10.1016/j.gdata.2015.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 11/07/2015] [Indexed: 11/23/2022]
Abstract
Studying the multitude of molecular networks and pathways that are potentially involved in a complex trait such as fertility requires an equally complex and broad strategy. Here, we used Next-Generation Sequencing for the characterization of the transcriptional signature of the bovine endometrial tissue. Periovulatory endocrine environments were manipulated to generate two distinctly different fertility phenotypes. Cycling, non-lactating, multiparous Nelore cows were manipulated to ovulate larger (> 13 mm; LF group; high fertility phenotype) or smaller (< 12 mm; SF group) follicles. As a result, greater proestrus estrogen concentrations, corpora lutea and early diestrus progesterone concentrations were also observed in LF group in comparison to SF group. Endometrial cell proliferation was estimated by the protein marker MKI67 on tissues collected 4 (D4) and 7 (D7) days after induction of ovulation. Total RNA extracts from D7 were sequenced and compared according to the transcriptional profile of each experimental group (LF versus SF). Functional enrichment analysis revealed that LF and SF endometria were asynchronous in regards to their phenotype manifestation. Major findings indicated an LF endometrium that was switching phenotypes earlier than the SF one. More specifically, a proliferating SF endometrium was observed on D7, whereas the LF tissue, which expressed a proliferative phenotype earlier at D4, seemed to have already shifted towards a biosynthetically and metabolically active endometrium on D7. Data on MKI67 support the transcriptomic results. RNA-Seq-derived transcriptional profile of the endometrial tissue indicated a temporal effect of the periovulatory endocrine environment, suggesting that the moment of the endometrial exposure to the ovarian steroids, E2 and P4, regulates the timing of phenotype manifestation. Gene expression profiling revealed molecules that may be targeted to elucidate ovarian steroid-dependent mechanisms that regulate endometrial tissue receptivity. Data was deposited in the SRA database from NCBI (SRA Experiment SRP051330) and are associated with the Bio-Project (PRJNA270391). An overview of the gene expression data has been deposited in NCBI's Gene Expression Omnibus (GEO) and is accessible through GEO Series accession number GSE65450. Further assessment of the data in combination with other data sets exploring the transcriptional profile of the endometrial tissue during early diestrus may potentially identify novel molecular mechanisms and/or markers of the uterine receptivity.
Collapse
Affiliation(s)
- F S Mesquita
- Universidade Federal do Pampa, Curso de Medicina Veterinária, Uruguaiana, RS, Brazil
| | - R S Ramos
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil
| | - G Pugliesi
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil
| | - S C S Andrade
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil; Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba, SP, Brazil
| | - V Van Hoeck
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil
| | - A Langbeen
- University of Antwerp, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, Wilrijk, Belgium
| | - M L Oliveira
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil
| | - A M Gonella-Diaza
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil
| | - G Gasparin
- Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba, SP, Brazil
| | - H Fukumasu
- Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, SP, Brazil
| | - L H Pulz
- Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, SP, Brazil
| | - C M Membrive
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Campus Experimental de Dracena, Dracena, SP, Brazil
| | - L L Coutinho
- Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba, SP, Brazil
| | - M Binelli
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, SP, Brazil
| |
Collapse
|
17
|
Oliveira AE, Iwahara A, Silva CJ, Cruz PAL, Poledna R, Silva RL, Laranjeira AS, Delgado JU, Tauhata L, Loureiro JS, Toledo BC, Braghirolli AMS, Andrade EAL, Silva JL, Hernandes HOK, Valente ES, Dalle HM, Almeida VM, Silva TG, Fragoso MCF, Oliveira ML, Nascimento ESS, Oliveira EM, Herrerias R, Souza AA, Bambalas E, Bruzinga WA. Traceability from governmental producers of radiopharmaceuticals in measuring (18)F in Brazil. Appl Radiat Isot 2015; 109:236-241. [PMID: 26688362 DOI: 10.1016/j.apradiso.2015.11.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 11/20/2015] [Indexed: 11/16/2022]
Abstract
Since the inception of its proficiency test program to evaluate radionuclide measurement in hospitals and clinics, the National Metrology Laboratory of Ionizing Radiation-LNMRI, that represents Brazilian National Metrology Institute (NMI) for ionizing radiation has expanded its measurement and calibration capability. Requirements from the National Health Surveillance Agency from Ministry of Health (ANVISA), to producers of radiopharmaceuticals provided an opportunity to improve the full traceability chain to the highest level. Fluorodeoxyglucose (FDG-(18)F) is the only radiopharmaceutical simultaneously produced by all Brazilian radiopharmaceutical production centers (RPCs). By running this proficiency test, LNMRI began to provide them with the required traceability. For evaluation, the ratio of RPC to reference value results and ISO/IEC17043:2010 criteria were used. The reference value established as calibration factor on the secondary standard ionization chamber was obtained from three absolute measurements systems, and routinely confirmed in each round of proficiency test by CIEMAT/NIST liquid scintillation counting. The γ-emitting impurities were checked using a High-Purity Germanium (HPGe) detector. The results show that Brazilian RPCs are in accordance with (accuracy within ±10%) the Brazilian standard for evaluation of measurements with radionuclide calibrators (CNEN NN 3.05., 2013). Nevertheless, the RPCs should improve the methodology of uncertainty estimates, essential when using the statistical criteria of ISO/IEC 17043 standard, in addition to improving accuracy to levels consistent with their position in the national traceability chain.
Collapse
Affiliation(s)
- A E Oliveira
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil.
| | - A Iwahara
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - C J Silva
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - P A L Cruz
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - R Poledna
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - R L Silva
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - A S Laranjeira
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - J U Delgado
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - L Tauhata
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - J S Loureiro
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - B C Toledo
- Laboratório Nacional de Metrologia das Radiações Ionizantes (LNMRI)/Instituto de Radioproteção e Dosimetria (IRD)/Comissão Nacional de Energia Nuclear (CNEN), Av. Salvador Allende s/n, 22780-160 Recreio CEP Rio de Janeiro, Brazil
| | - A M S Braghirolli
- Instituto de Engenharia Nuclear (IEN)/Comissão Nacional de Energia Nuclear (CNEN), Cidade Universitária, Ilha do Fundão, ⁎ Caixa Postal 68550, CEP 21945-970 Rio de Janeiro, Brazil
| | - E A L Andrade
- Instituto de Engenharia Nuclear (IEN)/Comissão Nacional de Energia Nuclear (CNEN), Cidade Universitária, Ilha do Fundão, ⁎ Caixa Postal 68550, CEP 21945-970 Rio de Janeiro, Brazil
| | - J L Silva
- Instituto de Engenharia Nuclear (IEN)/Comissão Nacional de Energia Nuclear (CNEN), Cidade Universitária, Ilha do Fundão, ⁎ Caixa Postal 68550, CEP 21945-970 Rio de Janeiro, Brazil
| | - H O K Hernandes
- Instituto de Engenharia Nuclear (IEN)/Comissão Nacional de Energia Nuclear (CNEN), Cidade Universitária, Ilha do Fundão, ⁎ Caixa Postal 68550, CEP 21945-970 Rio de Janeiro, Brazil
| | - E S Valente
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN)/CNEN, Avenida Presidente Antônio Carlos, 6.627-Campus UFMG, CEP 31270-901-Caixa Postal 941, CEP 30161-970 Belo Horizonte, Minas, Brazil
| | - H M Dalle
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN)/CNEN, Avenida Presidente Antônio Carlos, 6.627-Campus UFMG, CEP 31270-901-Caixa Postal 941, CEP 30161-970 Belo Horizonte, Minas, Brazil
| | - V M Almeida
- Centro Regional de Ciências Nucleares (CRCN - NE)/ CNEN, Avenida Professor Luiz Freire, no. 200, Cidade Universitária, CEP: 50.740-545 Recife-PE, Brazil
| | - T G Silva
- Centro Regional de Ciências Nucleares (CRCN - NE)/ CNEN, Avenida Professor Luiz Freire, no. 200, Cidade Universitária, CEP: 50.740-545 Recife-PE, Brazil
| | - M C F Fragoso
- Centro Regional de Ciências Nucleares (CRCN - NE)/ CNEN, Avenida Professor Luiz Freire, no. 200, Cidade Universitária, CEP: 50.740-545 Recife-PE, Brazil
| | - M L Oliveira
- Centro Regional de Ciências Nucleares (CRCN - NE)/ CNEN, Avenida Professor Luiz Freire, no. 200, Cidade Universitária, CEP: 50.740-545 Recife-PE, Brazil
| | - E S S Nascimento
- Centro Regional de Ciências Nucleares (CRCN - NE)/ CNEN, Avenida Professor Luiz Freire, no. 200, Cidade Universitária, CEP: 50.740-545 Recife-PE, Brazil
| | - E M Oliveira
- Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN, Caixa Postal 11049, CEP 05422-970 São Paulo, Brazil
| | - R Herrerias
- Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN, Caixa Postal 11049, CEP 05422-970 São Paulo, Brazil
| | - A A Souza
- Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN, Caixa Postal 11049, CEP 05422-970 São Paulo, Brazil
| | - E Bambalas
- Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN, Caixa Postal 11049, CEP 05422-970 São Paulo, Brazil
| | - W A Bruzinga
- Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN, Caixa Postal 11049, CEP 05422-970 São Paulo, Brazil
| |
Collapse
|
18
|
Kangussu LM, Oliveira ML, Santos RA, Campagnole-Santos MJ. Abstract P203: ICV Angiotensin-(1-7) Decreased TNF-α and Increased IL-10 in the Hypothalamus of (mRen2)27 Transgenic Hypertensive Rats. Hypertension 2015. [DOI: 10.1161/hyp.66.suppl_1.p203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hypertensive rats subjected to chronic intracerebroventricular (ICV) infusion of angiotensin-(1-7) [Ang-(1-7)] presented attenuation of arterial hypertension, improvement the baroreflex sensitivity and restoration of cardiac autonomic tonus. In the present study we evaluated whether chronic increase in Ang-(1-7) in the brain modulates inflammatory mediators in the hypothalamus of the transgenic hypertensive rats that present overexpression of renin [(mRen2)27; TGR]. Sprague Dawley (SD) and TGR were subjected to 14 days of ICV infusion of Ang-(1-7) (200 ng/h) or 0.9% sterile saline (0.5 μl/h) through osmotic mini-pumps. The animals were euthanized by decapitation and the hypothalamus was quickly removed and frozen on dry ice. Cytokine levels were evaluated through Elisa assay and enzymes of RAS were measured by fluorimetric assays. As expected, levels of pro-inflammatory cytokines (IL-1α, IL-6 and TNF-α) were increased in TGR (48 ± 3.5 pg/mg, 61 ± 2.7 pg/mg, 76 ± 4.3 pg/mg, respectively) as compared to SD rats (23 ± 1.8 pg/mg, 38 ± 3.4 pg/mg, 39 ± 3.5 pg/mg, respectively), while IL-10 was not altered. Interestingly, ICV infusion of Ang-(1-7) reduced levels of TNF-α (48 ± 3.4 pg/mg vs 76 ± 4.3 pg/mg in untreated TGR) and increased the levels of IL-10 (32 ± 2.6 pg/mg vs 19 ± 1.2 pg/mg in untreated TGR), without affecting IL-1α or IL-6 levels. No difference was found in ACE activity in plasma, on the other hand, the increased ACE activity in the hypothalamus of TGR (207 ± 25.5 nmoles His-Leu/ min/ mg of protein vs 173 ± 13.0 nmoles His-Leu/ min/ mg of protein, in SD rats) was significantly reduced (134 ± 7.9 nmoles His-Leu/ min/ mg of protein) by ICV infusion of Ang-(1-7). These data show that long term increase in Ang-(1-7) levels in the brain modulates inflammatory mediators in the hypothalamus, suggesting a possible additional mechanism for Ang-(1-7) antihypertensive action in the central nervous system.
Collapse
|
19
|
Mesquita FS, Ramos RS, Pugliesi G, Andrade SCS, Van Hoeck V, Langbeen A, Oliveira ML, Gonella-Diaza AM, Gasparin G, Fukumasu H, Pulz LH, Membrive CM, Coutinho LL, Binelli M. The Receptive Endometrial Transcriptomic Signature Indicates an Earlier Shift from Proliferation to Metabolism at Early Diestrus in the Cow. Biol Reprod 2015; 93:52. [PMID: 26178716 DOI: 10.1095/biolreprod.115.129031] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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: 02/18/2015] [Accepted: 06/19/2015] [Indexed: 01/23/2023] Open
Abstract
This study aimed to characterize the endometrial transcriptome and functional pathways overrepresented in the endometrium of cows treated to ovulate larger (≥13 mm) versus smaller (≤12 mm) follicles. Nelore cows were presynchronized prior to receiving cloprostenol (large follicle [LF] group) or not (small follicle [SF] group), along with a progesterone (P4) device on Day (D) -10. Devices were withdrawn and cloprostenol administered 42-60 h (LF) or 30-36 h (SF) before GnRH agonist treatment (D0). Tissues were collected on D4 (experiment [Exp.] 1; n = 24) or D7 (Exp. 2; n = 60). Endometrial transcriptome was obtained by RNA-Seq, whereas proliferation and apoptosis were assessed by immunohistochemistry. Overall, LF cows developed larger follicles and corpora lutea, and produced greater amounts of estradiol (D-1, Exp. 1, SF: 0.7 ± 0.2; LF: 2.4 ± 0.2 pg/ml; D-1, Exp. 2, SF: 0.5 ± 0.1; LF: 2.3 ± 0.6 pg/ml) and P4 (D4, Exp. 1, SF: 0.8 ± 0.1; LF: 1.4 ± 0.2 ng/ml; D7, Exp. 2, SF: 2.5 ± 0.4; LF: 3.7 ± 0.4 ng/ml). Functional enrichment indicated that biosynthetic and metabolic processes were enriched in LF endometrium, whereas SF endometrium transcriptome was biased toward cell proliferation. Data also suggested reorganization of the extracellular matrix toward a proliferation-permissive phenotype in SF endometrium. LF endometrium showed an earlier onset of proliferative activity, whereas SF endometrium expressed a delayed increase in glandular epithelium proliferation. In conclusion, the periovulatory endocrine milieu regulates bovine endometrial transcriptome and seems to determine the transition from a proliferation-permissive to a biosynthetic and metabolically active endometrial phenotype, which may be associated with the preparation of an optimally receptive uterine environment.
Collapse
Affiliation(s)
- F S Mesquita
- Universidade Federal do Pampa, Curso de Medicina Veterinária, Uruguaiana, Rio Grande do Sul, Brazil
| | - R S Ramos
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil
| | - G Pugliesi
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil
| | - S C S Andrade
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba, São Paulo, Brazil
| | - V Van Hoeck
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil
| | - A Langbeen
- University of Antwerp, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, Wilrijk, Belgium
| | - M L Oliveira
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil
| | - A M Gonella-Diaza
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil
| | - G Gasparin
- Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba, São Paulo, Brazil
| | - H Fukumasu
- Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, São Paulo, Brazil
| | - L H Pulz
- Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, São Paulo, Brazil
| | - C M Membrive
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Campus Experimental de Dracena, Dracena, São Paulo, Brazil
| | - L L Coutinho
- Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba, São Paulo, Brazil
| | - M Binelli
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, Pirassununga, São Paulo, Brazil
| |
Collapse
|
20
|
Rodrigues-Machado MG, Magalhães GS, Cardoso JA, Kangussu LM, Murari A, Caliari MV, Oliveira ML, Cara DC, Noviello MLM, Marques FD, Pereira JM, Lautner RQ, Santos RAS, Campagnole-Santos MJ. AVE 0991, a non-peptide mimic of angiotensin-(1-7) effects, attenuates pulmonary remodelling in a model of chronic asthma. Br J Pharmacol 2014; 170:835-46. [PMID: 23889691 DOI: 10.1111/bph.12318] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 06/20/2013] [Accepted: 07/17/2013] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND AND PURPOSE AVE 0991 (AVE) is a non-peptide compound, mimic of the angiotensin (Ang)-(1-7) actions in many tissues and pathophysiological states. Here, we have investigated the effect of AVE on pulmonary remodelling in a murine model of ovalbumin (OVA)-induced chronic allergic lung inflammation. EXPERIMENTAL APPROACH We used BALB/c mice (6-8 weeks old) and induced chronic allergic lung inflammation by OVA sensitization (20 μg·mouse(-1) , i.p., four times, 14 days apart) and OVA challenge (1%, nebulised during 30 min, three times per·week, for 4 weeks). Control and AVE groups were given saline i.p and challenged with saline. AVE treatment (1 mg·kg(-1) ·per day, s.c.) or saline (100 μL·kg(-1) ·per day, s.c.) was given during the challenge period. Mice were anaesthetized 72 h after the last challenge and blood and lungs collected. In some animals, primary bronchi were isolated to test contractile responses. Cytokines were evaluated in bronchoalveolar lavage (BAL) and lung homogenates. KEY RESULTS Treatment with AVE of OVA sensitised and challenged mice attenuated the altered contractile response to carbachol in bronchial rings and reversed the increased airway wall and pulmonary vasculature thickness and right ventricular hypertrophy. Furthermore, AVE reduced IL-5 and increased IL-10 levels in the BAL, accompanied by decreased Ang II levels in lungs. CONCLUSIONS AND IMPLICATIONS AVE treatment prevented pulmonary remodelling, inflammation and right ventricular hypertrophy in OVA mice, suggesting that Ang-(1-7) receptor agonists are a new possibility for the treatment of pulmonary remodelling induced by chronic asthma.
Collapse
Affiliation(s)
- M G Rodrigues-Machado
- National Institute of Science and Technology in Nanobiopharmaceutics (INCT-NANOBIOFAR), Department of Physiology and Biophysics, Biological Sciences Institute, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Oliveira ML, Hoffmann MIM, Mituti T, Pavan MA, Krause-Sakate R. First Report of Garlic virus X in Garlic Plants in Brazil. Plant Dis 2014; 98:1013. [PMID: 30708836 DOI: 10.1094/pdis-08-13-0845-pdn] [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: 06/09/2023]
Abstract
Garlic is the fifth most economically important vegetable in Brazil and is frequently infected by a complex of different viruses that cause significant degeneration of the crop under field conditions. The species of the genus Allexivirus that infect garlic are: Garlic virus A (GarV-A), Garlic virus B (GarV-B), Garlic virus C (GarV-C), Garlic virus D (GarV-D), Garlic virus E (GarV-E), Garlic virus X (GarV-X), Garlic mite-borne filamentous viru s (GarMbFV), and Shallot virus X (ShVX). So far, only GarV-A, GarV-B, GarV-C, GarV-D, and GarMbFV have been reported in Brazil (3). During the 2010 through 2013 seasons, between April and October, 302 garlic plants with yellow mosaic strips and distorted leaves from the cultivars Caçador, Quitéria, Tropical Bergamota, and Tropical Shangai were collected in the states of Paraná, Minas Gerais, São Paulo, and Goiás and analyzed for the presence of allexiviruses. Total plant RNA was extracted with the Total RNA Purification kit (Norgen Biotek Corp., Canada) according to manufacturer's instructions. RT-PCR reactions were performed initially with the primer pair named Cpallexi-senso2 (5' CTACCACAAYGGNTCVTC 3') and Cpallexi-anti1 (5' CACNGCGTTRAAGAARTC 3') specifically designed to amplify a ~230-bp fragment from all currently known allexiviruses. Positive samples were then analyzed with specific primers for GarV-A, GarV-C, and GarV-D (2), GarMbFV (1) and GarV-B named CPBS2 (5' GCAGAATAARCCCCCYTC 3') and CPBA1 (5' RAAGGGTTTATTCTGTTG 3') obtained in this work. Among the plants analyzed, 50 were positive for the Cpallexi-senso2/Cpallexi-anti1 primers but negative for all the specific primers tested, indicating the presence of a different allexivirus. These samples were then analyzed by RT-PCR for the presence of GarV-X, GarV-E, and ShVX and an amplicon of ~550 bp was obtained only with primers CPXS2 (5' GCCTTCTGAAAATGACTTAG 3') and CPXA1 (5' CTAGGATTTGCTGTTGGG 3') designed in this work to amplify a fragment of the capsid protein gene for GarV-X. Since species demarcation in the genus Allexivirus is based on the coat protein (CP) gene (2), another set of primers, namely PIXS1 (GACGACGGYGCACTACTC) / PIXA1 (YGTGAATCGTGATGATCC) and PFXS2 (CRCTGAGACAATTYYGTGG) / PFXA2 (CAAAGCATCGGCCRTAGCG) derived from conserved regions of ORF4, ORF5 (CP), and ORF 6 sequences of allexiviruses available in the NCBI database, were used in RT-PCR to obtain the complete CP gene nucleotide sequence. A 1,071-nt sequence comprising 108 bp of ORF4 (partial), 732 bp of the CP, and 177 bp of ORF 6 was successfully amplified (GenBank Accession No. KF530328). The complete CP gene showed 98% nucleotide sequence identity with GarV-X from Australia (JQ807994.1). In summary, GarV-X was detected in the 50 samples collected from Minas Gerais, São Paulo, and Paraná, indicating widespread distribution in Brazil. To our knowledge, this is the first report of GarV-X in garlic in Brazil. References: (1) M. S. Fayad-Andre et al. Trop. Plant Pathol. 36:341, 2011. (2) P. A. Melo Filho et al. Pesq. Agropec. Bras. 39:735, 2004. (3) R. J. Nascimento et al. Summa Phytopathol. 34:267, 2008.
Collapse
Affiliation(s)
- M L Oliveira
- Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, FCA-UNESP, Department of Plant Protection, Botucatu, SP, Brazil
| | - M I M Hoffmann
- Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, FCA-UNESP, Department of Plant Protection, Botucatu, SP, Brazil
| | - T Mituti
- Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, FCA-UNESP, Department of Plant Protection, Botucatu, SP, Brazil
| | - M A Pavan
- Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, FCA-UNESP, Department of Plant Protection, Botucatu, SP, Brazil
| | - R Krause-Sakate
- Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, FCA-UNESP, Department of Plant Protection, Botucatu, SP, Brazil
| |
Collapse
|
22
|
Oliveira ML, Freitas DQ, Ambrosano GMB, Haiter-Neto F. Influence of exposure factors on the variability of CBCT voxel values: a phantom study. Dentomaxillofac Radiol 2014; 43:20140128. [PMID: 24869906 DOI: 10.1259/dmfr.20140128] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To assess the influence of milliamperage and kilovolt peak (kVp) on the variability of cone beam CT (CBCT) voxel values. METHODS CBCT scans were obtained from radiographic phantoms in varying concentrations of dipotassium hydrogen phosphate solutions (200-1200 mg ml(-1)) under different protocols of milliamperage and kVp. In addition, scans were performed with and without a dental implant and exo-mass. The variability of CBCT voxel values was measured on each scan, and factorial analysis of variance and the post hoc Tukey test were performed (α = 0.05). Linear regression was performed to assess the relationship between voxel value variability and dipotassium hydrogen phosphate concentration. RESULTS milliamperage and the presence of a dental implant did not produce significant interference (p = 0.28 and 0.87, respectively) in voxel value variability. Scans at the highest kVp value presented a significant reduction (p ≤ 0.0001) in voxel value variability when only exo-mass was not present. Voxel value variability was not influenced by exo-mass in scans at the highest levels of milliamperage and kVp. The presence of exo-mass produced a significant reduction (p ≤ 0.0001) in voxel value variability in most of the scans. Higher concentrations yielded greater variations in voxel values in all scans, except for those operating at the highest levels of mAs and kVp. CONCLUSIONS mAs did not influence the variability of CBCT voxel values; higher kVp reduced such variability when only the object was smaller than the field of view.
Collapse
Affiliation(s)
- M L Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, State University of Campinas, Piracicaba Dental School, Piracicaba, Sao Paulo, Brazil
| | | | | | | |
Collapse
|
23
|
Oliveira ML, Seren MEG, Rocha FC, Brunetto SQ, Ramos CD, Button VLSN. Attenuation correction effects on SPECT/CT procedures: phantoms studies. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:2324-7. [PMID: 24110190 DOI: 10.1109/embc.2013.6610003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Attenuation correction is widely used in SPECT/CT (Single Photon Emission Computed Tomography) procedures, especially for imaging of the thorax region. Different compensation methods have been developed and introduced into clinical practice. Most of them use attenuation maps obtained using transmission scanning systems. However, this gives extra dose of radiation to the patient. The purpose of this study was to identify when attenuation correction is really important during SPECT/CT procedures.For this purpose, we used Jaszczak phantom and phantom with three line sources, filled with technetium ((99m)-Tc), with scattering materials, like air, water and acrylic, in different detectors configurations. In all images acquired were applied analytic and iterative reconstruction algorithms; the last one with or without attenuation correction. We analyzed parameters such as eccentricity, contrast and spatial resolution in the images.The best reconstruction algorithm on average was iterative, for images with 128 × 128 and 64 × 64 matrixes. The analytical algorithm was effective only to improve eccentricity in 64 × 64 matrix and matrix in contrast 128 × 128 with low statistics. Turning to the clinical routine examinations, on average, for 128 × 128 matrix and low statistics counting, the best algorithm was the iterative, without attenuation correction,improving in 150% the three parameters analyzed and, for the same matrix size, but with high statistical counting, iterative algorithm with attenuation correction was 25% better than that without correction. We can conclude that using the iterative algorithm with attenuation correction in the water, and its extra dose given, is not justified for the procedures of low statistic counting, being relevant only if the intention is to prioritize contrast in acquisitions with high statistic counting.
Collapse
|
24
|
Silveira KD, Coelho FM, Vieira AT, Barroso LC, Queiroz-Junior CM, Costa VV, Sousa LFC, Oliveira ML, Bader M, Silva TA, Santos RAS, Silva ACSE, Teixeira MM. Mechanisms of the anti-inflammatory actions of the angiotensin type 1 receptor antagonist losartan in experimental models of arthritis. Peptides 2013; 46:53-63. [PMID: 23727291 DOI: 10.1016/j.peptides.2013.05.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [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: 03/10/2013] [Revised: 05/14/2013] [Accepted: 05/14/2013] [Indexed: 12/28/2022]
Abstract
Angiotensin (Ang) II and its AT1 receptors have been implicated in the pathogenesis of rheumatoid arthritis. Activation of the counter-regulatory Ang-(1-7)-Mas receptor axis may contribute to some of the effects of AT₁ receptor blockers (ARBs). In this study, we have used losartan, an ARB, to investigate the role of and the mechanisms by which AT₁ receptors participated in two experimental models of arthritis: antigen-induced arthritis (AIA) in mice and adjuvant-induced arthritis (AdIA) in rats. Treatment with losartan decreased neutrophil recruitment, hypernociception and the production of TNF-α, IL-1β and chemokine (C-X-C motif) ligand 1 in mice subjected to AIA. Histopathological analysis showed significant reduction of tissue injury and inflammation and decreased proteoglycan loss. In addition to decreasing cytokine production, losartan directly reduced leukocyte rolling and adhesion. Anti-inflammatory effects of losartan were not associated to Mas receptor activation and/or Ang-(1-7) production. Anti-inflammatory effects were reproduced in rats subjected to AdIA. This study shows that ARBs have potent anti-inflammatory effects in animal models of arthritis. Mechanistically, reduction of leukocyte accumulation and of joint damage was associated with local inhibition of cytokine production and direct inhibition of leukocyte-endothelium interactions. The anti-inflammatory actions of losartan were accompanied by functional improvement of the joint, as seen by reduced joint hypernociception. These findings support the use of ARBs for the treatment of human arthritis and provide potential mechanisms for the anti-inflammatory actions of these compounds.
Collapse
MESH Headings
- Angiotensin I/biosynthesis
- Angiotensin II Type 1 Receptor Blockers/pharmacology
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Arthritis, Experimental/drug therapy
- Arthritis, Rheumatoid/drug therapy
- Cell Adhesion/drug effects
- Chemokine CXCL1/biosynthesis
- Disease Models, Animal
- Female
- Hyperalgesia/drug therapy
- Inflammation/drug therapy
- Interleukin-1beta/biosynthesis
- Leukocyte Rolling/drug effects
- Losartan/pharmacology
- Male
- Mice
- Mice, Inbred C57BL
- Neutrophil Infiltration/drug effects
- Peptide Fragments/biosynthesis
- Proto-Oncogene Mas
- Proto-Oncogene Proteins/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptor, Angiotensin, Type 1/drug effects
- Receptor, Angiotensin, Type 1/metabolism
- Receptors, G-Protein-Coupled/metabolism
- Tumor Necrosis Factor-alpha/biosynthesis
Collapse
Affiliation(s)
- Kátia D Silveira
- Immunopharmacology, Department of Biochemistry and Immunology, Institute of Biological Sciences, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Fraga-Silva RA, Costa-Fraga FP, Murça TM, Moraes PL, Martins Lima A, Lautner RQ, Castro CH, Soares CMA, Borges CL, Nadu AP, Oliveira ML, Shenoy V, Katovich MJ, Santos RAS, Raizada MK, Ferreira AJ. Angiotensin-converting enzyme 2 activation improves endothelial function. Hypertension 2013; 61:1233-8. [PMID: 23608648 DOI: 10.1161/hypertensionaha.111.00627] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Diminished release and function of endothelium-derived nitric oxide coupled with increases in reactive oxygen species production is critical in endothelial dysfunction. Recent evidences have shown that activation of the protective axis of the renin-angiotensin system composed by angiotensin-converting enzyme 2, angiotensin-(1-7), and Mas receptor promotes many beneficial vascular effects. This has led us to postulate that activation of intrinsic angiotensin-converting enzyme 2 would improve endothelial function by decreasing the reactive oxygen species production. In the present study, we tested 1-[[2-(dimetilamino)etil]amino]-4-(hidroximetil)-7-[[(4-metilfenil)sulfonil]oxi]-9H-xantona-9 (XNT), a small molecule angiotensin-converting enzyme 2 activator, on endothelial function to validate this hypothesis. In vivo treatment with XNT (1 mg/kg per day for 4 weeks) improved the endothelial function of spontaneously hypertensive rats and of streptozotocin-induced diabetic rats when evaluated through the vasorelaxant responses to acetylcholine/sodium nitroprusside. Acute in vitro incubation with XNT caused endothelial-dependent vasorelaxation in aortic rings of rats. This vasorelaxation effect was attenuated by the Mas antagonist D-pro7-Ang-(1-7), and it was reduced in Mas knockout mice. These effects were associated with reduction in reactive oxygen species production. In addition, Ang II-induced reactive oxygen species production in human aortic endothelial cells was attenuated by preincubation with XNT. These results showed that chronic XNT administration improves the endothelial function of hypertensive and diabetic rat vessels by attenuation of the oxidative stress. Moreover, XNT elicits an endothelial-dependent vasorelaxation response, which was mediated by Mas. Thus, this study indicated that angiotensin-converting enzyme 2 activation promotes beneficial effects on the endothelial function and it is a potential target for treating cardiovascular disease.
Collapse
Affiliation(s)
- Rodrigo A Fraga-Silva
- National Institute of Science and Technology in Nanobiopharmaceutics, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, 31.270-901 Belo Horizonte, MG, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Oliveira ML, Duarte JMB. Amplifiability of mitochondrial, microsatellite and amelogenin DNA loci from fecal samples of red brocket deer Mazama americana (Cetartiodactyla, Cervidae). Genet Mol Res 2013; 12:44-52. [PMID: 23359023 DOI: 10.4238/2013.january.16.8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We tried to amplify mitochondrial, microsatellite and amelogenin loci in DNA from fecal samples of a wild Mazama americana population. Fifty-two deer fecal samples were collected from a 600-ha seasonal semideciduous forest fragment in a subtropical region of Brazil (21°20'S, 47°17'W), with the help of a detection dog; then, stored in ethanol and georeferenced. Among these samples 16 were classified as "fresh" and 36 as "non-fresh". DNA was extracted using the QIAamp(®) DNA Stool Mini Kit. Mitochondrial loci were amplified in 49 of the 52 samples. Five microsatellite loci were amplified by PCR; success in amplification varied according to locus size and sample age. Successful amplifications were achieved in 10/16 of the fresh and in 13/36 of the non-fresh samples; a negative correlation (R = -0.82) was found between successful amplification and locus size. Amplification of the amelogenin locus was successful in 22 of the 52 samples. The difficulty of amplifying nuclear loci in DNA samples extracted from feces collected in the field was evident. Some methodological improvements, including collecting fresh samples, selecting primers for shorter loci and quantifying the extracted DNA by real-time PCR, are suggested to increase amplification success in future studies.
Collapse
Affiliation(s)
- M L Oliveira
- Núcleo de Pesquisa e Conservação de Cervídeos, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil.
| | | |
Collapse
|
27
|
Guimarães GG, Santos SHS, Oliveira ML, Pimenta-Velloso EP, Motta DF, Martins AS, Alenina N, Bader M, Santos RAS, Campagnole-Santos MJ. Exercise induces renin-angiotensin system unbalance and high collagen expression in the heart of Mas-deficient mice. Peptides 2012; 38:54-61. [PMID: 22921883 DOI: 10.1016/j.peptides.2012.05.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 05/25/2012] [Accepted: 05/27/2012] [Indexed: 12/27/2022]
Abstract
The renin-angiotensin system (RAS) is involved in the cardiac and vascular remodeling associated with cardiovascular diseases. Angiotensin (Ang) II/AT(1) axis is known to promote cardiac hypertrophy and collagen deposition. In contrast, Ang-(1-7)/Mas axis opposes Ang II effects in the heart producing anti-trophic and anti-fibrotic effects. Exercise training is known to induce cardiac remodeling with physiological hypertrophy without fibrosis. We hypothesize that cardiac remodeling induced by chronic exercise depends on the action of Ang-(1-7)/Mas axis. Thus, we evaluated the effect of exercise training on collagen deposition and RAS components in the heart of FVB/N mice lacking Mas receptor (Mas-KO). Male wild-type and Mas-KO mice were subjected to a moderate-intense swimming exercise training for 6 weeks. The left ventricle (LV) of the animals was sectioned and submitted to qRT-PCR and histological analysis. Circulating and tissue angiotensin peptides were measured by RIA. Sedentary Mas-KO presented a higher circulating Ang II/Ang-(1-7) ratio and an increased ACE2 expression in the LV. Physical training induced in Mas-KO and WT a similar cardiac hypertrophy accompanied by a pronounced increase in collagen I and III mRNA expression. Trained Mas-KO and trained WT presented increased Ang-(1-7) in the blood. However, only in trained-WT there was an increase in Ang-(1-7) in the LV. In summary, we showed that deletion of Mas in FVB/N mice produced an unbalance in RAS equilibrium increasing Ang II/AT(1) arm and inducing deleterious cardiac effects as deposition of extracellular matrix proteins. These data indicate that Ang-(1-7)/Mas axis is an important counter-regulatory mechanism in physical training mediate cardiac adaptations.
Collapse
Affiliation(s)
- Gislaine G Guimarães
- INCT NanoBioFar, Department of Physiology and Biophysics, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
|
29
|
Rentzsch B, Todiras M, Iliescu R, Popova E, Campos LA, Oliveira ML, Baltatu OC, Santos RA, Bader M. Transgenic angiotensin-converting enzyme 2 overexpression in vessels of SHRSP rats reduces blood pressure and improves endothelial function. Hypertension 2008; 52:967-73. [PMID: 18809792 DOI: 10.1161/hypertensionaha.108.114322] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Rat models of hypertension, eg, spontaneously hypertensive stroke-prone rats (SHRSP), display reduced angiotensin-converting enzyme 2 (ACE2) mRNA and protein expression compared with control animals. The aim of this study was to investigate the role of ACE2 in the pathogenesis of hypertension in these models. Therefore, we generated transgenic rats on a SHRSP genetic background expressing the human ACE2 in vascular smooth muscle cells by the use of the SM22 promoter, called SHRSP-ACE2. In these transgenic rats vascular smooth muscle expression of human ACE2 was confirmed by RNase protection, real-time RT-PCR, and ACE2 activity assays. Transgene expression leads to significantly increased circulating levels of angiotensin-(1-7), a prominent product of ACE2. Mean arterial blood pressure was reduced in SHRSP-ACE2 compared to SHRSP rats, and the vasoconstrictive response to intraarterial administration of angiotensin II was attenuated. The latter effect was abolished by previous administration of an ACE2 inhibitor. To evaluate the endothelial function in vivo, endothelium-dependent and endothelium-independent agents such as acetylcholine and sodium nitroprusside, respectively, were applied to the descending thoracic aorta and blood pressure was monitored. Endothelial function turned out to be significantly improved in SHRSP-ACE2 rats compared to SHRSP. These data demonstrate that vascular ACE2 overexpression in SHRSP reduces hypertension probably by locally degrading angiotensin II and improving endothelial function. Thus, activation of the ACE2/angiotensin-(1-7) axis may be a novel therapeutic strategy in hypertension.
Collapse
Affiliation(s)
- Brit Rentzsch
- Max-Delbrück-Center for Molecular Medicine, Berlin-Buch, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Oliveira ML, Caldas LVE. Performance of a prototype of an extrapolation minichamber in various radiation beams. Appl Radiat Isot 2007; 65:975-9. [PMID: 17574854 DOI: 10.1016/j.apradiso.2007.03.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2005] [Revised: 01/10/2007] [Accepted: 03/22/2007] [Indexed: 11/26/2022]
Abstract
An extrapolation minichamber was developed for measuring doses from weakly penetrating types of radiation. The chamber was tested at the radiotherapeutic dose level in a beam from a (90)Sr+(90)Y check source, in a beam from a plane (90)Sr+(90)Y ophthalmic applicator, and in several reference beams from an X-ray tube. Saturation, ion collection efficiency, stabilization time, extrapolation curves, linearity of chamber response vs. air kerma rate, and dependences of the response on the energy and irradiation angle were characterized. The results are satisfactory; they show that the chamber can be used in the dosimetry of (90)Sr+(90)Y beta particles and low-energy X-ray beams.
Collapse
Affiliation(s)
- M L Oliveira
- Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN), Comissão Nacional de Energia Nuclear, Av. Prof. Lineu Prestes 2242, 05508-000 São Paulo, SP, Brazil.
| | | |
Collapse
|
31
|
Oliveira ML, Machado-Neto JG. Permeability of two types of cotton fabric used in personal protective clothing to the insecticide methamidophos. Bull Environ Contam Toxicol 2005; 75:1156-62. [PMID: 16402306 DOI: 10.1007/s00128-005-0870-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2005] [Accepted: 10/11/2005] [Indexed: 05/06/2023]
Affiliation(s)
- M L Oliveira
- Department of Crop Protection, Faculty of Agrarian and Veterinarian Sciences, State University of São Paulo, Via de Acesso Prof. Paulo Donato Castellane, s/n 14.884-900, Jaboticabal, São Paulo State, Brazil
| | | |
Collapse
|
32
|
Oliveira ML, Machado-Neto JG. Use of manganese as tracer in the determination of respiratory exposure and relative importance of exposure routes in the safety of pesticide applicators in citrus orchards. Bull Environ Contam Toxicol 2003; 70:415-421. [PMID: 12592512 DOI: 10.1007/s00128-003-0002-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- M L Oliveira
- Department of Crop Protection, Faculty of Agrarian and Veterinarian Sciences, State University of São Paulo, Via de Acesso Prof. Paulo Donato Castellane, s/n, 14.884-900, Jaboticabal, São Paulo State, Brazil
| | | |
Collapse
|
33
|
Santos AR, Balassiano V, Oliveira ML, Pereira MA, Santos PB, Degrave WM, Suffys PN. Detection of Mycobacterium leprae DNA by polymerase chain reaction in the blood of individuals, eight years after completion of anti-leprosy therapy. Mem Inst Oswaldo Cruz 2001; 96:1129-33. [PMID: 11784934] [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: 02/23/2023] Open
Abstract
Thirty eight patients with indeterminate leprosy (HI), at least 4 to 6 years after discharge from multibacillary (MB) or paucibacillary (PB) schemes of anti leprosy multidrug therapy (MDT), were submitted to traditional diagnostic procedures for leprosy and to polymerase chain reaction (PCR) analysis of different clinical samples for detection of Mycobacterium leprae DNA. No significant difference was observed for any of the parameters analyzed between PB or MB schemes of treatment and no indications were found for more efficient outcome of HI using the MB scheme. Remarkably, 18 (54.5%) of the individuals were PCR positive in at least one of the samples: positivity of PCR was highest in blood samples and four individuals were PCR positive in blood and some other sample. Upon comparison of PCR results with clinical and histopathological parameters, no correlation was found between PCR-positivity and eventual relapse. This is the first report on detection of M. leprae DNA in PB patients, more than half a decade after completion of MDT, suggesting that live bacilli are present and circulating much longer than expected, although reinfection of the individuals can not be excluded. Overall, we feel that because of the high sensitivity of the assay, extreme care should be taken about association of PCR results, efficacy of treatment and disease status.
Collapse
Affiliation(s)
- A R Santos
- Setor de Hanseníase, Departamento de Medicina Tropical, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro, RJ, 21045-900, Brasil
| | | | | | | | | | | | | |
Collapse
|
34
|
Junqueira de Azevedo IL, Farsky SH, Oliveira ML, Ho PL. Molecular cloning and expression of a functional snake venom vascular endothelium growth factor (VEGF) from the Bothrops insularis pit viper. A new member of the VEGF family of proteins. J Biol Chem 2001; 276:39836-42. [PMID: 11517227 DOI: 10.1074/jbc.m106531200] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
During the generation of abundant expressed sequence tags from the Viperidae snake Bothrops insularis venom glands, we identified for the first time a cDNA coding for a putative vascular endothelial growth factor-like (VEGF-like) protein. The deduced primary sequence, after complete sequencing of the longest snake venom VEGF (svVEGF) cDNA, displayed similarity with vertebrate VEGFs and with the hypotensive factor from Vipera aspis venom. Its cDNA was subcloned, expressed in Escherichia coli with a His(6) tag as an insoluble monomer, and purified by Ni(2+)-affinity chromatography after 8 m urea extraction. Antiserum against svVEGF was generated and tested in Western blot against proteins from snake venoms and cellular extracts. The mature svVEGF appears to be ubiquitously distributed throughout snake venoms and was also confirmed by Northern blot studies of other related Viperidae species and by cDNA cloning of svVEGF from Bothrops jararaca pit viper. The produced recombinant protein dimerizes after refolding processes and was biologically characterized, showing ability to increase vascular permeability. These results established that svVEGF is a novel and important active toxin during the early stages of bothropic snake bite envenoming and represents a new member of the VEGF family of proteins.
Collapse
Affiliation(s)
- I L Junqueira de Azevedo
- Centro de Biotecnologia, Laboratório de Imunoquimica, Instituto Butantan, 1500 São Paulo 05503-900, Brazil
| | | | | | | |
Collapse
|
35
|
Sass N, Cançado RR, Oliveira ML, Torloni MR. [Prenatal corticoid therapy in hypertensive syndromes of pregnancies and its effects in maternal blood pressure]. Rev Assoc Med Bras (1992) 2001; 47:255-8. [PMID: 11723507 DOI: 10.1590/s0104-42302001000300039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate the behaviour of blood pressure among hypertensive pregnants during glucocorticoid therapy (LIGGINS scheme) in order to accelerate the maturity of fetal lung. METHODS In a retrospective study, 27 pregnant with a story of hypertensive disorder, between 24 and 34 weeks, during glucocorticoid cycle were avaluated. For this matter, statistical analisis were performed using the means of systolic (SBP) and diastolic blood pressure during the therapy days, on the day before and on the day after. The results were statistically analyzed with F statistic test ( significant if p<005) RESULTS There was no statistical variance in blood pressure levels, neither in SBP nor in DBP. There was no difficulty in clinical controls and no change in antihypertensive drugs related to glucocorticoid therapy. CONCLUSIONS Our results show observe the safety of glucocorticoid therapy among pregnant women with hypertensive disorders related to the possible raising of the blood pressure levels.
Collapse
Affiliation(s)
- N Sass
- Hospital e Maternidade Escola Doutor Mário de Moraes Altenfelder Silva, São Paulo, SP.
| | | | | | | |
Collapse
|
36
|
Saback FL, Palmer TE, Sabino RR, Carvalho SM, Amorim LM, Gaspar AM, Oliveira ML, Yoshida CF, Niel C. Infection with hepatitis A and TT viruses and socioeconomic status in Rio de Janeiro, Brazil. Scand J Infect Dis 2001; 33:121-5. [PMID: 11233846 DOI: 10.1080/003655401750065508] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The prevalence of antibodies directed against the enterically transmitted hepatitis A virus (HAV) was measured in 2 groups of people living in Rio de Janeiro, Brazil. Of 1,056 health care workers (HCWs), 778 (73.7%) were anti-HAV positive. A high prevalence of anti-HAV antibodies (85.7%) was also found among 274 voluntary blood donors (BDs). TT virus (TTV) is a DNA virus that has been found in the sera of patients with post-transfusion hepatitis of unknown etiology. Occurrence of virus shedding suggests that the fecal-oral route may be an important mode of TTV transmission, particularly in the developing world. The presence of TTV DNA was analyzed by PCR in the sera of 191 HCWs and 151 BDs. TTV was detected in 65.4% of HCWs and 79.5% of BDs. In both groups, a family income of < US$400 per month and a level of education of < 11 y of schooling were found to be risk factors for HAV infection. Furthermore, a low family income was associated with TTV viremia in the HCW group. However, the presence of TTV DNA was associated with neither low level of education nor anti-HAV positivity.
Collapse
Affiliation(s)
- F L Saback
- Department of Virology, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Oliveira ML. [Learning to "look" at those who approach us]. Servir 2000; 48:119-22. [PMID: 12043595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
|
38
|
Esmeraldo RM, Donadi MO, Oliveira ML, Ponte CN, Pinheiro PM. Mycophenolate mofetil with lower cyclosporine dose in high-risk renal transplant recipients. Transplant Proc 1999; 31:3007-8. [PMID: 10578367 DOI: 10.1016/s0041-1345(99)00644-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- R M Esmeraldo
- Transplant Unit, Hospital Geral de Fortaleza, Brazil
| | | | | | | | | |
Collapse
|
39
|
Oliveira ML, Bastos FI, Telles PR, Yoshida CF, Schatzmayr HG, Paetzold U, Pauli G, Schreier E. Prevalence and risk factors for HBV, HCV and HDV infections among injecting drug users from Rio de Janeiro, Brazil. Braz J Med Biol Res 1999; 32:1107-14. [PMID: 10464387 DOI: 10.1590/s0100-879x1999000900009] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Viral hepatitis constitutes a major health issue, with high prevalence among injecting drug users (IDUs). The present study assessed the prevalence and risk determinants for hepatitis B, C and D viruses (HBV, HCV and HDV) infections among 102 IDUs from Rio de Janeiro, Brazil. Serological markers and HCV-RNA were detected by enzyme immunoassay and nested PCR, respectively. HCV genotyping was determined by restriction fragment length polymorphism analysis (RFLP). HBsAg, anti-HBc and anti-HBs were found in 7.8, 55.8 and 24. 7% of IDUs, respectively. In the final logistic regression, HBV infection was independently associated with male homosexual intercourse within the last 5 years (odds ratio (OR) 3.1; 95% confidence interval (CI) 1.1-8.8). No subject presented anti-delta (anti-HD). Anti-HCV was detected in 69.6% of subjects, and was found to be independently associated with needle sharing in the last 6 months (OR 3.4; 95% CI 1.3-9.2) and with longer duration of iv drug use (OR 3.1; 95% CI 1.1-8.7). These data demonstrate that this population is at high risk for both HBV and HCV infection. Among IDUs from Rio de Janeiro, unprotected sexual intercourse seems to be more closely associated with HBV infection, whereas HCV is positively correlated with high risk injecting behavior. Comprehensive public health interventions targeting this population and their sexual partners must be encouraged.
Collapse
Affiliation(s)
- M L Oliveira
- Laboratório de Hepatites Virais, Departamento de Virologia, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil.
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
Polyomavirus is a DNA tumor virus that induces a variety of tumors in mice. Its genome encodes three proteins, namely large T (LT), middle T (MT), and small T (ST) antigens, that have been implicated in cell transformation and tumorigenesis. LT is associated with cell immortalization, whereas MT plays an essential role in cell transformation by binding to and activating several cytoplasmic proteins that participate in growth factor-induced mitogenic signal transduction to the nucleus. The use of different MT mutants has led to the identification of MT-binding proteins as well as analysis of their importance during cell transformation. Studying the molecular mechanisms of cell transformation by MT has contributed to a better understanding of cell cycle regulation and growth control.
Collapse
Affiliation(s)
- M L Oliveira
- Instituto de Química, Universidade de São Paulo, Brasil
| | | | | |
Collapse
|
41
|
Oliveira ML. [In search of truth as a condition for a happy existence]. Servir 1999; 47:170-1. [PMID: 12043592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
|
42
|
Oliveira ML, Bastos FI, Sabino RR, Paetzold U, Schreier E, Pauli G, Yoshida CF. Distribution of HCV genotypes among different exposure categories in Brazil. Braz J Med Biol Res 1999; 32:279-82. [PMID: 10347784 DOI: 10.1590/s0100-879x1999000300005] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hepatitis C virus (HCV) infection is widespread and responsible for more than 60% of chronic hepatitis cases. HCV presents a genetic variability which has led to viral classification into at least 6 genotypes and a series of subtypes. These variants present characteristic geographical distribution, but their association with different responses to treatment with interferon and severity of disease still remains controversial. The aim of this study was to investigate the patterns of distribution of HCV genotypes among different exposure categories in Brazil. Two hundred and fifty anti-HCV positive samples were submitted to HCV-RNA detection by RT-PCR and their genotype was determined by restriction fragment length polymorphism (RFLP) analysis. In addition, the genotype/subtype of 60 samples was also determined by a reverse hybridization assay. HCV 1 was the most prevalent (72.0%), followed by type 3 (25.3%), HCV 2 (2.0%) and HCV 4 (0.7%). The HCV genotype distribution varied among the different exposure categories, with HCV 1 being more frequent among blood donors, hemophiliacs and hemodialysis patients. A high frequency of HCV 3 was observed in cirrhotic patients, blood donors from the South of Brazil and injecting drug users (IDUs). The general distribution of the HCV genotype in Brazil is similar to that in other regions of the world.
Collapse
Affiliation(s)
- M L Oliveira
- Departamento de Virologia, Instituto Oswaldo Cruz, Rio de Janeiro, Brasil
| | | | | | | | | | | | | |
Collapse
|
43
|
Abstract
Cell transformation by Polyomavirus middle T (MT) oncoprotein involves binding and activation of several cytoplasmic proteins that participate in growth factors-induced mitogenic signal transduction to the nucleus. We have previously reported that the AP-1 transcriptional complex is a target for MT during cell transformation. To analyse the interactions between MT and cellular proteins that are required for constitutive AP-1 activation, we compared wild type and transformation-defective MT mutant cell lines. High AP-1 activity, assessed by gel mobility shift assays, displayed by MT-overexpressing cells, is dependent on MT binding to phosphatidylinositol-3 kinase (P13K). Treatment with wortmannin (a specific P13K inhibitor) leads to decreased AP-1 activity. Supershift and Western blot analysis with specific antisera, indicate that JunB and cJun, but not cFos or FosB are present in the AP-1 complex. The results confirm the AP-1 complex as a downstream MT target and indicate that AP-1 activation may not be sufficient for cell transformation, since two transformation-defective MT mutants (250phe and MT322) display high AP-1 activity.
Collapse
Affiliation(s)
- M L Oliveira
- Instituto de Química, Universidade de São Paulo, SP, Brasil
| | | | | | | |
Collapse
|
44
|
Tomaz EM, Ferreira MF, Spínola MA, Oliveira ML, Clode MH, Palma-Carlos AG. Nasal provocation tests in the diagnosis of urticaria induced by acetylsalicylic acid. Allergy Asthma Proc 1997; 18:319-22. [PMID: 9337427 DOI: 10.2500/108854197778590515] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Nasal provocation tests with lysine acetylsalicylic acid (ASA) have been used in the diagnosis of ASA-induced asthma and rhinitis. To establish its possible role in identifying aspirin sensitivity manifested by urticaria or angioedema, 18 patients suffering from chronic or acute recurring urticaria/angioedema (10 ASA-sensitive and 8 ASA-nonsensitive) were submitted to nasal provocation tests with freshly prepared solutions of lysine ASA. Clinical response and variation of nasal expiratory peak-flow were evaluated, classified according to previously defined scores, and compared. The results showed a significant difference between ASA-sensitive and ASA-nonsensitive patients, suggesting that this test can be an important diagnostic tool for ASA-induced urticaria/angioedema.
Collapse
Affiliation(s)
- E M Tomaz
- I Medical Clinic, University Hospital Santa Maria, Lisboa, Portugal
| | | | | | | | | | | |
Collapse
|
45
|
Armelin MC, Oliveira ML. Polyomavirus-induced malignant transformation: comparative analysis of wild type and mutant middle T-overexpressing cell lines. Braz J Med Biol Res 1996; 29:1133-40. [PMID: 9181056] [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: 02/04/2023] Open
Abstract
Polyomavirus, a DNA tumor virus, expresses three viral oncoproteins (large, middle and small T antigens), causes malignant transformation in cell culture and induces multiple tumors in vivo. The middle T (MT) antigen seems to play an essential role in transformation and tumorigenicity. The observation that MT-overexpressing cell lines are able to grow in the absence of PDGF (platelet-derived growth factor) led several laboratories to study the mechanism underlying MT-induced growth deregulation and the signal transduction pathway used by this viral oncoprotein. A number of cellular proteins were shown to be common to both the normal PDGF mitogenic pathway and the MT transforming pathway. The expression of some PDGF primary response genes (fos, jun, myc, JE, KC) was shown to be rendered constitutive by MT overexpression. Using MT mutants, important domains for binding and activation of cytoplasmic proteins were mapped. Wild type and mutant MT cell lines are used in our laboratory to analyze the expression and activity of the PDGF early response genes during cell transformation and correlate them with activation of specific cytoplasmic proteins. In addition to abrogating the PDGF requirement for growth, activation of cellular proteins caused by MT results in cell lines that have an altered morphology and are able to form colonies in agarose. These changes may be due to alterations in connexin 43 and other cell surface proteins.
Collapse
Affiliation(s)
- M C Armelin
- Instituto de Química, Universidade de São Paulo, Brasil.
| | | |
Collapse
|
46
|
Armelin MC, Oliveira ML, Mercado JM, Sasahara RM, Valentini SR, Carvalho LH. Molecular genetic approach to cell proliferation control and neoplasia. Braz J Med Biol Res 1996; 29:911-9. [PMID: 9070380] [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: 02/03/2023] Open
Abstract
A number of gene products involved in the control of cell proliferation fall into one of two classes: oncogenes and tumor suppressor genes. The same gene products have also been associated with malignant growth (tumors) caused by radiation, chemicals and tumor viruses. Here we describe our attempts to elucidate the molecular mechanisms underlying polyomavirus-induced cell transformation and the anti-tumor activity of glucocorticoid hormones. Wild type and mutant polyomavirus middle T (MT) overexpressing cell lines, generated with retroviral vector constructs, were used to investigate the role played by peptide growth factor primary response genes (fos, jun, myc, JE, KC) in viral transformation and to map the transduction pathway of the mitogenic signal of MT. Overexpression of MT leads to increased AP-1 (Fos/Jun) transcriptional complex activity. Transformation defective mutant analysis allowed the identification of sites in the MT molecule that are crucial for this activity. Two different approaches were used to investigate the molecular basis for glucocorticoids anti-tumor activity, namely: blind cloning of cDNAs and analysis of growth control genes in C6 glioma cell variants that are either hypersensitive (C6/ST1) or unresponsive to glucocorticoids (C6/P7). Four different glucocorticoid-regulated cDNA sequences were isolated using differential hybridization. A number of differentially expressed sequences were isolated from glucocorticoid-treated C6/ST1 cells by differential display (DDRT-PCR) and are currently being characterized. Expression of known growth control genes in C6/ST1 cells allowed the identification of important candidates for glucocorticoid hormone targets.
Collapse
Affiliation(s)
- M C Armelin
- Instituto de Química, Universidade de São Paulo, Brasil.
| | | | | | | | | | | |
Collapse
|
47
|
Beck A, Lima MC, Castro MC, Drummond DX, Oliveira ML, Oelemann W, Pauli G, van Tilburg Bernardes YS. Performance of HTLV-1 screening assays in Brazil. Zentralbl Bakteriol 1996; 283:340-6. [PMID: 9138620 DOI: 10.1016/s0934-8840(96)80069-7] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In recent years a variety of studies have been carried out to compare the accuracy (generally expressed in terms of sensitivity and specificity) of commercially available anti-HTLV tests. None of these studies were performed in Brazil or in any other South American country. During the characterization of our Brazilian reference panel we evaluated the sensitivities and specificities of the Abbott HTLV EIA (100%; 89.7%) and the Biochrom HTLV-1/-2 ELISA (100%; 42.4%). Our conclusion was that both assays may be problematic in terms of correctly identifying HTLV-negative sera. We therefore adjusted the cut-off values using receiver operating characteristics (ROC). ROC analysis, which involves calculating sensitivity and specificity for several cut-off values, can be used to ascertain the co-variation in the specificity and sensitivity of any assay giving quantitative results. The optimum cut-off value for the assay in a given study population is the point that gives highest possible sensitivity in conjunction with a small false-positive fraction. Using the HTLV-1/-2 Western blot as the "gold standard", we were able to improve the specificity of the Biochrom HTLV-1/-2 assay to 95% without affecting its sensitivity of 100%. However, it seems that when using the Biochrom HTLV-1/-2 ELISA, there may be problems in separating positive and negative sera. In the case of the Abbott HTLV EIA, our ROC analysis revealed that the cut-off value suggested by the manufacturer was nearly identical to the optimum cut-off value. Adjustment will affect neither sensitivity nor specificity. However, a slight adjustment of the cut-off value result in a clearer separation of the positive and negative populations. Furthermore, we assume that this adjustment will help to avoid false-positive results when larger serum panels are investigated. Further investigations will show whether or not this problem is linked to the geographical regions where the test is performed (e.g. polyclonal stimulation due to parasitic infections in tropical countries).
Collapse
Affiliation(s)
- A Beck
- Departamento de Sangue e Hemoderivados, Instituto Nacional de Qualidade em Saude (INCQS-DSH), Rio de Janeiro, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Cavalcanti JS, Andrade LP, Moreira IE, Rietra PH, Oliveira ML. A morphological and functional study of the cavo-hepatic junction in the human. Surg Radiol Anat 1995; 17:311-4. [PMID: 8896149 DOI: 10.1007/bf01795188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The authors studied the morphological and structural aspects of the junctions between the hepatic veins and the inferior vena cava. The study was carried out on 20 specimens obtained from adult cadavers of both sexes, fixed in 10% formaldehyde solution. The hepatic veins with their junctions on the inferior vena cava were isolated. Then a macroscopic analysis of the openings of the hepatic veins into the inferior vena cava was performed. Part of this material was embedded in paraffin, submitted to serial sectioning and stained with Azan's trichrome and resorcin-fuchsin. Three hepatic veins were observed in all cases: right, left and the middle. In 20% of the cases the middle hepatic vein opens directly into the inferior vena cava. The hepatic vein openings are supported by two pillars inferiorly united through a semilunar fold. The hepatic vein wall is greatly thickened at the level of its junction with the inferior vena cava, showing a large amount of muscular and collagenous fibers. These bundles constitute a sphincter-like formation which may play a physiological role in the control of the hepatic circulation.
Collapse
Affiliation(s)
- J S Cavalcanti
- Department of Anatomy, Federal University of Pernambuco, Recife, Brazil
| | | | | | | | | |
Collapse
|
49
|
Valentini SR, Oliveira ML, Sasahara RM, Armelin MC. Glucocorticoid-regulated gene in transformed to normal phenotypic reversion. Braz J Med Biol Res 1994; 27:541-6. [PMID: 8081279] [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: 01/28/2023] Open
Abstract
Glucocorticoid hormones modulate the actions of peptide growth factors and constitute important therapeutic tools as anti-inflammatory and anti-tumor agents. The C6 rat glioma cell line responds to glucocorticoids with changes in morphology and growth block. The hyper-responsive ST1 cell variant displays a dramatic phenotypic reversion under the influence of these hormones. Thus, the transformed and tumorigenic cells reversibly change to a normal and non-tumorigenic phenotype. In addition, the cells also produce a C-type retrovirus. We used poly A+ mRNA from ST1 cells that had been treated with hydrocortisone to generate a cDNA library that was then screened, by differential hybridization, for glucocorticoid-responsive cellular sequences. The retroviral genomic RNA was used to generate a viral-specific probe. Cross hybridization led to the isolation of at least 4 cDNA clones of which 3 are cellular sequences and one corresponds to a retroviral gene. These clones were characterized by DNA sequencing and Northern blot hybridization analysis.
Collapse
Affiliation(s)
- S R Valentini
- Departamento de Bioquímica, Universidade de São Paulo, Brasil
| | | | | | | |
Collapse
|
50
|
Abstract
Eighteen newborn infants, gestational age between 36 and 42 weeks with birth asphyxia were compared with 23 normal newborn infants to determine serum cortisol and dehydroepiandrosterone sulfate levels in cord blood and in venous blood samples collected 12-18 hours after birth. Both groups were similar in gestational age, birthweight, proportion of small for gestational age and large for gestational age infants, proportion of infants delivered by cesarean section with and without labor, and proportion of mothers with pre-eclampsia. There was no antenatal exposure to corticosteroid. The asphyxiated newborn infants had a significantly higher mean cord serum level of cortisol, and a significantly lower mean cord serum level of dehydroepiandrosterone sulfate than the control group. Mean serum cortisol and dehydroepiandrosterone sulfate levels collected 12-18 hours after birth were similar between both groups. It is suggested that elevated cord serum level of cortisol is related to birth asphyxia stress stimulating the adrenal definitive zone, and the low cord serum level of dehydroepiandrosterone sulfate is secondary to a transient hypoxemic-ischemic insult to the adrenal fetal zone.
Collapse
Affiliation(s)
- R S Procianoy
- Department of Pediatrics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | |
Collapse
|