1
|
Cota R, Ribeiro K. Herpes simplex: a cautious approach to a malignant clinical appearance in a pre-diagnosis, case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
2
|
Dias L, Ribeiro K, Cota R, Amaral F, Prado B. Subcondylar osteotomy – case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Dias L, Ribeiro K, Cota R, Menezes F, Goto A. Comminuted fracture approach in mandibular FPI. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
4
|
Dias L, Ribeiro K, Cota R, Menezes F, Goto A. Anterior subapical osteotomy in mandible. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
5
|
Ribeiro K, Souza R, Cota R, Dias L. Condylar hyperplasia treated by simultaneous high condylectomy and orthognathic surgery: a case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
6
|
Barbosa FMC, Dupin TV, Toledo MDS, Reis NFDC, Ribeiro K, Cronemberger-Andrade A, Rugani JN, De Lorenzo BHP, Novaes E Brito RR, Soares RP, Torrecilhas AC, Xander P. Extracellular Vesicles Released by Leishmania ( Leishmania) amazonensis Promote Disease Progression and Induce the Production of Different Cytokines in Macrophages and B-1 Cells. Front Microbiol 2018; 9:3056. [PMID: 30627118 PMCID: PMC6309564 DOI: 10.3389/fmicb.2018.03056] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 11/27/2018] [Indexed: 12/20/2022] Open
Abstract
The extracellular vesicles (EVs) released by Leishmania can contribute to the establishment of infection and host immunomodulation. In this study, we characterized the shedding of EVs from Leishmania (Leishmania) amazonensis promastigotes. This species is the causative agent of cutaneous leishmaniasis, and its role during interactions with bone marrow-derived macrophages (BMDMs) and peritoneal B-1 cells was evaluated. Leishmania amazonensis promastigotes cultivated in vitro at different times and temperatures spontaneously released EVs. EVs were purified using size-exclusion chromatography (SEC) and quantitated by nanoparticle tracking analysis (NTA). NTA revealed that the average size of the EVs was approximately 180 nm, with concentrations ranging from 1.8 × 108 to 2.4 × 109 vesicles/mL. In addition, the presence of LPG and GP63 were detected in EVs obtained at different temperatures. Naïve BMDMs stimulated with EVs exhibited increased IL-10 and IL-6 expression. However, incubating B-1 cells with parasite EVs did not stimulate IL-10 expression but led to an increase in the expression of IL-6 and TNFα. After 7 weeks post-infection, animals infected with L. amazonensis promastigotes in the presence of parasite EVs had significant higher parasite load and a polarization to Th2 response, as compared to the group infected with the parasite alone. This work demonstrated that EVs isolated from L. amazonensis promastigotes were able to stimulate macrophages and B-1 cells to express different types of cytokines. Moreover, the immunomodulatory properties of EVs probably contributed to an increase in parasite burden in mice. These findings suggest that the functionality of L. amazonensis EVs on immune system favor of parasite survival and disease progression.
Collapse
Affiliation(s)
- Fernanda Marins Costa Barbosa
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | - Talita Vieira Dupin
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | - Mayte Dos Santos Toledo
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | - Natasha Ferraz Dos Campos Reis
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | - Kleber Ribeiro
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | - André Cronemberger-Andrade
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | | | | | | | | | - Ana Claudia Torrecilhas
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| | - Patricia Xander
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo - Campus Diadema, Diadema, Brazil
| |
Collapse
|
7
|
Cardoso L, Ribeiro K, Valadares S, Cecon P, Freitas C, Raimundi T, Pena Y, Pereira O. PSVIII-33 In vitro DM and NDF degradability of signal grass and forage peanut. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L Cardoso
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - K Ribeiro
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - S Valadares
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - P Cecon
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - C Freitas
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - T Raimundi
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - Y Pena
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - O Pereira
- Universidade Federal de Vicosa, Viçosa, Brazil
| |
Collapse
|
8
|
Menezes R, Ribeiro K, Dubeux J, Anjos A, Rezende J, Pereira O. PSXI-29 Dynamics of litter decomposition in signalgrass and forage peanut mixed pastures. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R Menezes
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - K Ribeiro
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - J Dubeux
- North Florida Research and Education Center, University of Florida,Quincy, FL, United States
| | - A Anjos
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - J Rezende
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - O Pereira
- Universidade Federal de Vicosa, Viçosa, Brazil
| |
Collapse
|
9
|
Silveira T, Ribeiro K, Garcia R, Silveira J, Paula R, Pimentel F, Silva V, Pereira O. PSVIII-39 Silage of elephant grass harvested at different times and regrowth ages. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T Silveira
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - K Ribeiro
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - R Garcia
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - J Silveira
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - R Paula
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - F Pimentel
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - V Silva
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - O Pereira
- Universidade Federal de Viçosa, Viçosa, Brazil
| |
Collapse
|
10
|
Otoni I, Ribeiro K, Valadares S, Silva T, Silva L, Silva J, Pereira O. PSVIII-31 Grass and legume hays for feedlot sheep: in vivo digestibility and in situ degradability. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- I Otoni
- Universidade Federal de Vicosa,Vicosa, Brazil
| | - K Ribeiro
- Universidade Federal de Vicosa,Vicosa, Brazil
| | - S Valadares
- Universidade Federal de Vicosa,Vicosa, Brazil
| | - T Silva
- Universidade Federal de Vicosa,Vicosa, Brazil
| | - L Silva
- Universidade Federal de Vicosa,Vicosa, Brazil
| | - J Silva
- Universidade Federal do Oeste da Bahia,Barriers, Brazil
| | - O Pereira
- Universidade Federal de Vicosa,Vicosa, Brazil
| |
Collapse
|
11
|
Freitas C, Ribeiro K, Valote P, Jaguaribe T, Abreu M, Sousa M, Morenz M, Gomide C. PSXI-3 Tussock dynamics in pastures of BRS Zuri and BRS Quênia under rotational stocking. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- C Freitas
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - K Ribeiro
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - P Valote
- Federal Rural University of Rio de Janeiro, Seropédica, Brazil
| | - T Jaguaribe
- Federal University of Juiz de For a, Juiz de For a, Brazil
| | - M Abreu
- IFET Rio Pomba,Rio Pomba, Brazil
| | - M Sousa
- Federal University of Bahia,Salvador, Brazil
| | | | | |
Collapse
|
12
|
Santos V, Ribeiro K, Menezes R, Nascimento H, Chaves C, Pereira O. PSXI-40 Morphogenetic characteristics of signal grass pastures in monoculture and intercropped with forage peanut. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- V Santos
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - K Ribeiro
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - R Menezes
- Universidade Federal de Vicosa, Viçosa, Brazil
| | | | - C Chaves
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - O Pereira
- Universidade Federal de Vicosa, Viçosa, Brazil
| |
Collapse
|
13
|
Nicolau J, Koike Folgueira M, Roela R, Maistro S, Katayama M, Eluf Neto J, Luizaga C, Ribeiro K, De Castro G. P3.09-25 Survival Analysis in Young Adults with Lung Carcinoma. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
14
|
Nogueira PM, Ribeiro K, Silveira ACO, Campos JH, Martins-Filho OA, Bela SR, Campos MA, Pessoa NL, Colli W, Alves MJM, Soares RP, Torrecilhas AC. Vesicles from different Trypanosoma cruzi strains trigger differential innate and chronic immune responses. J Extracell Vesicles 2015; 4:28734. [PMID: 26613751 PMCID: PMC4662668 DOI: 10.3402/jev.v4.28734] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 10/27/2015] [Accepted: 11/01/2015] [Indexed: 12/20/2022] Open
Abstract
Trypomastigote forms of Trypanosoma cruzi, the causative agent of Chagas Disease, shed extracellular vesicles (EVs) enriched with glycoproteins of the gp85/trans-sialidase (TS) superfamily and other α-galactosyl (α-Gal)-containing glycoconjugates, such as mucins. Here, purified vesicles from T. cruzi strains (Y, Colombiana, CL-14 and YuYu) were quantified according to size, intensity and concentration. Qualitative analysis revealed differences in their protein and α-galactosyl contents. Later, those polymorphisms were evaluated in the modulation of immune responses (innate and in the chronic phase) in C57BL/6 mice. EVs isolated from YuYu and CL-14 strains induced in macrophages higher levels of proinflammatory cytokines (TNF-α and IL-6) and nitric oxide via TLR2. In general, no differences were observed in MAPKs activation (p38, JNK and ERK 1/2) after EVs stimulation. In splenic cells derived from chronically infected mice, a different modulation pattern was observed, where Colombiana (followed by Y strain) EVs were more proinflammatory. This modulation was independent of the T. cruzi strain used in the mice infection. To test the functional importance of this modulation, the expression of intracellular cytokines after in vitro exposure was evaluated using EVs from YuYu and Colombiana strains. Both EVs induced cytokine production with the appearance of IL-10 in the chronically infected mice. A high frequency of IL-10 in CD4+ and CD8+ T lymphocytes was observed. A mixed profile of cytokine induction was observed in B cells with the production of TNF-α and IL-10. Finally, dendritic cells produced TNF-α after stimulation with EVs. Polymorphisms in the vesicles surface may be determinant in the immunopathologic events not only in the early steps of infection but also in the chronic phase.
Collapse
Affiliation(s)
- Paula M Nogueira
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Kleber Ribeiro
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Biológicas, Campus Diadema, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Amanda C O Silveira
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - João H Campos
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Biológicas, Campus Diadema, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Samantha R Bela
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Marco A Campos
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Natalia L Pessoa
- Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Walter Colli
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Maria J M Alves
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Rodrigo P Soares
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, Brazil
| | - Ana Claudia Torrecilhas
- Laboratório de Imunologia Celular e Bioquímica de Fungos e Protozoários, Departamento de Ciências Biológicas, Campus Diadema, Universidade Federal de São Paulo, São Paulo, Brazil;
| |
Collapse
|
15
|
Ribeiro K, Eluf Neto J, Luizaga C, Lombardo V, Leite V. Low Educational Level is Associated with Advanced Cancer Stage in Brazil. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv097.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
16
|
Silva J, Ribeiro K, Silva J, Cahú T, Bezerra R. Utilization of tilapia processing waste for the production of fish protein hydrolysate. Anim Feed Sci Technol 2014. [DOI: 10.1016/j.anifeedsci.2014.06.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
17
|
Liu APY, Shing MMK, Yuen HL, Li CH, Ling SC, Luk CW, Ha SY, Li CK, Chan GCF, Tsui K, Gajjar A, Li C, Srivastava D, Broniscer A, Wetmore C, Kun LE, Merchant TE, Ellison DW, Orr B, Boop FA, Paul Klimo J, Ross JD, Robison LL, Armstrong GT, Walker D, Chu T, Shah A, Wilne S, Coleman M, Jaque FAM, Muthappan M, Law AJJ, Shing MMK, Chan GCF, Yuen HL, Lee RCH, Ling SC, Luk CW, Ha SY, Li CK, Mang OWS, Ngan RKC, Alston R, Estlin E, McCabe M, Birch J, Gattamaneni R, Kamaly-Asl I, Estlin E, Kamaly-Asl I, McCabe M, Birch J, Gattamaneni R, Alston R, Alston R, Estlin E, McCabe M, Gattamaneni R, Birch J, Kamaly-Asl I, Bendel A, Pond D, Woehrer A, Azizi AA, Heumesser R, Hackl M, Hainfellner JA, Dorfer C, Czech T, Chocholous M, Slavc I, Haberler C, Hami H, Ayoujil A, Habib F, Soulaymani A, Mokhtari A, Quyou A, Lim AHJ, Chan MY, Tan AM, Soh SY, Garba SM, Hami H, Zaki HM, Soulaymani A, Nouhou H, Quyou A, Owens-Pickle E, Smith A, Green AL, Schoettler M, Bandopadhayay P, Sauer N, Manley PE, Chi SN, Rodriguez-Galindo C, Kieran MW, Ribeiro K. EPIDEMIOLOGY. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
18
|
Manso A, Oliveira I, Yazawa F, Veras MA, Ribeiro K. P2-255 Trends in mortality due to potentially HPV-related head and neck cancers in Brazil, 1980-2007. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
19
|
Garcia L, Ribeiro K, Araújo K, Pires J, Azevedo G, Dimenstein R. Alpha-tocopherol concentration in the colostrum of nursing women supplemented with retinyl palmitate and alpha-tocopherol. J Hum Nutr Diet 2011; 23:529-34. [PMID: 20831709 DOI: 10.1111/j.1365-277x.2010.01063.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Vitamins A and E are recognisably important in the initial stages of life, and the newborn depends on nutritional adequacy of breast milk to meet their needs. These vitamins share routes of transport to the tissues and antagonistic effects have been observed in animals after supplementation with vitamin A. The present study aimed to determine the effect of maternal supplementation with a megadose of retinyl palmitate in the immediate post-partum on α-tocopherol concentration in the colostrum. METHODS Healthy parturient women at a Brazilian public maternity were recruited for the study and divided into two groups: control (n = 37) and supplemented (n = 36). Blood and colostrum samples were collected up to 16 h post-partum. The supplemented group was administered with a retinyl palmitate capsule and, 24 h after the first collection, the second colostrum sample was obtained in the two groups for analysis of α-tocopherol. The cut-off points for deficiency are <1.05 μmol L(-1) for retinol and <11.6 μmol L(-1) for α-tocopherol. RESULTS The mean (SD) serum concentration of 1.77 (0.50) μmol L(-1) for retinol and 30.81 (6.46) μmol L(-1) for α-tocopherol indicates an adequate biochemical status. The supplemented group showed an increase of α-tocopherol in the colostrum 24 h after supplementation (P = 0.04), and this finding was not observed in the control group. CONCLUSIONS Supplementation with a 200,000 IU megadose of vitamin A did not negatively affect α-tocopherol levels in colostrum.
Collapse
Affiliation(s)
- L Garcia
- Department of Biochemistry, Center for Biosciences, Universidade Federal do Rio Grande do Norte, Natal (RN), Brazil
| | | | | | | | | | | |
Collapse
|
20
|
Franceschini-Vicentini IB, Papa LP, Bombonato MTS, Vicentini CA, Ribeiro K, Orsi AM. A Histological Study of the Seminal Vesicle of the Armoured Catfish Corydoras aeneus. Anat Histol Embryol 2007; 36:111-5. [PMID: 17371383 DOI: 10.1111/j.1439-0264.2006.00734.x] [Citation(s) in RCA: 4] [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: 11/27/2022]
Abstract
Most species of Corydoras exhibited a reproductive behaviour called 'T-position', and exhibited an accessory gland in the male genital tract, called the seminal vesicle. It appeared that both the structure and the composition of the fluid varied considerably between the species investigated. Consequently, different opinions were proposed regarding the possible role of seminal vesicle on this particular reproductive behaviour. Male adults of Corydoras aeneus were collected, anaesthetized, and samples of seminal vesicle were fixed in Bouin's solution. The sections were stained with haematoxylin-eosin and periodic acid Schiff. The seminal vesicle showed a system of anastomosed secretory tubules, forming a vesicular collective network, which gave rise to the vesicular ducts. The latter fused with the testicular efferent ducts and formed the spermatic ducts. Considering this fusion, when the sperm cells reached the spermatic ducts, the fluid produced at the seminal vesicle covered them. Histochemical studies evidenced the presence of neutral and acid glycosaminoglycans in the seminal fluid. Considering the reproductive behaviour of C. aeneus, it is believed that the protection associated with the immobilization of the sperm cells assures the sperm integrity during the passage through female's intestine until fertilization.
Collapse
Affiliation(s)
- I B Franceschini-Vicentini
- Department of Biological Sciences, Faculty of Sciences, São Paulo State University, UNESP, Bauru, SP, Brazil.
| | | | | | | | | | | |
Collapse
|
21
|
Ribeiro K, Metayer C, Buffler P. Socioeconomic Status (SES) and incidence of Childhood Acute Lymphocytic Leukemia (ALL) in Sao Paulo, Brazil. Am J Epidemiol 2006. [DOI: 10.1093/aje/163.suppl_11.s103-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
22
|
Toledo A, Borghi-silva A, Ribeiro K, Toledo P, Sampaio L, Costa D. Crit Care 2005; 9:P89. [DOI: 10.1186/cc3633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
23
|
Abstract
The fine structure of the axostyle in the protists Tritrichomonas foetus and Monocercomonas sp is described using transmission electron microscopy after quick-freezing techniques and immunocytochemistry. The axostyle microtubules presents a lateral projection formed by two protofilaments in addition to the 13 protofilaments normally found in microtubules. The axostyle is associated with other cell structures such as hydrogenosomes, endoplasmic reticulum, sigmoid filaments and glycogen particles. The microtubules of the pelta-axostylar system are connected to each other by bridges regularly spaced with an interval of 9 nm. Labeling of the axostyle was observed after cell incubation with monoclonal antibodies recognizing alpha-tubulin and acetylated-tubulin.
Collapse
Affiliation(s)
- M Benchimol
- Universidade Santa Ursula, Rio de Janeiro, Brazil.
| | | | | |
Collapse
|