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SUMMARY: There exists a scarcity of neurocognitive research that has successfully used electrophysiology as an objective tool to assess different learning modalitiesthat are commonly used in anatomy. The objective of this study was to explore the trend in the expression of brain waves in medical students when using different didactic strategies in learning anatomy. An exploratory, observational, cross-sectional study was conducted on 22 first- semester medical students in anatomy. Using didactic strategies with different pedagogical tools such as biological models (human skulls and pig hearts) and/or digital application (Visible Body software), and different evaluation methods, students were grouped into three groups: "EOR1" students who learned using a skull and were evaluated with it; "EOV1" students who learned using a pig heart and were evaluated with the Visible Body software; and "EOV2" for students who learned through the Visible Body software and were evaluated with it. During the evaluation, each student was monitored in real-time using an electroencephalogram and the Emotiv EPOC brain-computer interface system to record the electro-physiological activity of beta (B), theta (T), and gamma (G) waves. The data obtained (the trend of the electrical activity of each wave and its relationship with students' performance in each didactic strategy) were analyzed using Pearson's correlation coefficient. Groups EOR1 and EOV1 had satisfactory results in their evaluations and showed a predominance of B waves (x=67.33) and T waves (x=57.67). Additionally, a strongly positive correlation (r=0.82) was found between the presence of B waves and the duration of T waves. Students who used three-dimensional biological models as a pedagogical tool showed a predominance of B and T waves, which are associated with sensorimotor and exploratory learning necessary for studying anatomy.

RESUMEN: Son escasos los estudios de neurociencia cognitiva que permitan comprender, de manera objetiva, las manifestaciones electrofisiológicas de los estudiantes de medicina expuestos a diferentes herramientas pedagógicas utilizadas en el área de anatomía. El objetivo de este trabajo fue explorar la tendencia en la expresión de las ondas cerebrales de estudiantes de medicina, al utilizar diferentes estrategias didácticas en el aprendizaje de la anatomía. Se realizó un estudio exploratorio, observacional, de corte transversal en 22 estudiantes de medicina de primer semestre en anatomía. Utilizando estrategias didácticas con diferentes herramientas pedagógicas; como modelos biológicos (cráneos humanos y corazones porcinos) y/o aplicación digital (software Visible Body (SVB)), y diferente método de evaluación, se agruparon los estudiantes en tres grupos: “EOR1” estudiantes que aprendieron usando un cráneo y se evaluaron con este, “EOV1” estudiantes que aprendieron usando un corazón porcino y fueron evaluados con el SVB, y “EOV2” para los estudiantes que aprendieron a través del SVB y fueron evaluados con este. Durante la evaluación, cada estudiante fue monitorizado en tiempo real, utilizando un electroencefalograma y el sistema interfaz cerebro - computadora Emotiv EPOC para registrar la actividad electrofisiológica de las ondas beta (B), theta (T) y gamma (G). Los datos obtenidos (tendencia de la actividad eléctrica de cada onda y su relación con el desempeño de los estudiantes en cada estrategia didáctica) fueron analizados usando el índice de correlación de Pearson. Los grupos EOR1 y EOV1, tuvieron resultados satisfactorios en sus evaluaciones y presentaron predominio de ondas B (X=67,33) y T (X=57,67), además, se evidenció una correlación fuertemente positiva (r=0,82) entre la presencia de B y el tiempo de permanencia de T. Los estudiantes que utilizaron modelos biológicos tridimensionales como herramienta pedagógica presentaron predominio de las ondas B y T, asociadas con aprendizajes sensoriomotores y de tipo exploratorio necesarios para el estudio en anatomía.

Measles, mumps and rubella vaccination coverage in capitals and interior region municipalities of Northeast Brazil: a household survey in a cohort of children born in 2017 and 2018 Measles Brazil 201 20 2
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Maciel, Adjoane Mauricio Silva

; Ramos Jr, Alberto Novaes

; Ferreira, Anderson Fuentes

; Silva, Taynara Lais

; Domingues, Carla Magda Allan Santos

; Saavedra, Ramon da Costa

; Barbosa, Jaqueline Caracas

; França, Ana Paula

; Kerr, Ligia Regina Franco Sansigolo

; Teixeira, Maria da Gloria

; Moraes, José Cássio de

; Silva, Adriana Ilha da

; Ramos Jr., Alberto Novaes

; França, Ana Paula

; Oliveira, Andrea de Nazaré Marvão

; Boing, Antonio Fernando

; Domingues, Carla Magda Allan Santos

; Oliveira, Consuelo Silva de

; Maciel, Ethel Leonor Noia

; Guibu, Ione Aquemi

; Mirabal, Isabelle Ribeiro Barbosa

; Barbosa, Jaqueline Caracas

; Lima, Jaqueline Costa

; Moraes, José Cássio de

; Luhm, Karin Regina

; Caetano, Karlla Antonieta Amorim

; Lima, Luisa Helena de Oliveira

; Antunes, Maria Bernadete de Cerqueira

; Teixeira, Maria da Gloria

; Teixeira, Maria Denise de Castro

; Borges, Maria Fernanda de Sousa Oliveira

; Queiroz, Rejane Christine de Sousa

; Gurgel, Ricardo Queiroz

; Barata, Rita Barradas

; Azevedo, Roberta Nogueira Calandrini de

; Oliveira, Sandra Maria do Valle Leone de

; Teles, Sheila Araújo

; Gama, Silvana Granado Nogueira da

; Mengue, Sotero Serrate

; Simões, Taynãna César

; Nascimento, Valdir

; Araújo, Wildo Navegantes de

Epidemiologia e Serviços de Saúde

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2024, Volume 33 Nº spe2 elocation e20231296

Resumo: Pt En Es | Texto: Pt En Es | PDF: Pt | PDF: En | PDF: Es

RESUMO Objetivo Analisar a cobertura vacinal contra sarampo, caxumba e rubéola em crianças até 24 meses de idade e os fatores associados à não vacinação em coorte de nascidos-vivos em 2017-2018, em capitais e municípios de grande porte populacional do interior do Nordeste brasileiro. Métodos Inquérito domiciliar populacional com análise de cobertura vacinal e fatores sociodemográficos por regressão logística. Resultados Em 12.137 crianças, cobertura vacinal de 79,3% (IC95% 76,5;81,8) e taxa de abandono de 10,6%. Associação à não vacinação: estrato socioeconômico A (OR-a 1,29; IC95% 1,10;1,50), residir no interior (OR-a 1,22; IC95% 1,07;1,39), não acesso ao Programa Bolsa Família (OR-a 1,19; IC95% 1,05;1,34), renda familiar ≤ R$ 1.000,00 (OR-a 1,17; IC95% 1,03;1,31), mãe sem trabalho remunerado (OR-a 1,28; IC95% 1,15;1,42), > 1 filho por mãe (OR-a 1,12; IC95% 1,08;1,17), sem caderneta de vacinação (OR-a 10,69; IC95% 6,27;18,20). Conclusão Baixa cobertura e alta taxa de abandono vacinal em capitais e municípios do interior do Nordeste. sarampo 2 nascidosvivos nascidos vivos 20172018, 20172018 2017 2018, 2018 2017-2018 brasileiro logística 12137 12 137 12.13 793 79 3 79,3 IC95 IC (IC95 76,581,8 765818 76,5 81,8 76 5 81 8 76,5;81,8 106 10 6 10,6% ORa OR 1,29 129 29 1,101,50, 110150 1,10 1,50 , 50 1,10;1,50) 1,22 122 22 1,071,39, 107139 1,07 1,39 07 39 1,07;1,39) 1,19 119 19 1,051,34, 105134 1,05 1,34 05 34 1,05;1,34) R 100000 000 00 1.000,0 1,17 117 17 1,031,31, 103131 1,03 1,31 03 31 1,03;1,31) 1,28 128 28 1,151,42, 115142 1,15 1,42 15 42 1,15;1,42) 1,12 112 1,081,17, 108117 1,08 08 1,08;1,17) 10,69 1069 69 6,2718,20. 6271820 6,27 18,20 . 27 18 20 6,27;18,20) 2017201 201 2017-201 1213 13 12.1 7 79, IC9 (IC9 581 76,581, 76581 765 76, 818 81, 76,5;81, 10,6 1,2 101 1,101,50 11015 110 1,1 150 1,5 1,10;1,50 071 1,071,39 10713 107 1,0 139 1,3 0 1,07;1,39 11 051 1,051,34 10513 105 134 1,05;1,34 10000 1.000, 031 1,031,31 10313 103 131 1,03;1,31 151 1,151,42 11514 115 142 1,4 4 1,15;1,42 081 1,081,17 10811 108 1,08;1,17 2718 6,2718,20 627182 627 6,2 1820 18,2 6,27;18,20 201720 2017-20 121 12. (IC 58 76,581 7658 76,5;81 10, 1, 1,101,5 1101 1,10;1,5 1,071,3 1071 1,07;1,3 1,051,3 1051 1,05;1,3 1000 1.000 1,031,3 1031 1,03;1,3 1,151,4 1151 14 1,15;1,4 1,081,1 1081 1,08;1,1 271 6,2718,2 62718 62 6, 182 18, 6,27;18,2 20172 2017-2 76,58 76,5;8 1,101, 1,10;1, 1,071, 1,07;1, 1,051, 1,05;1, 100 1.00 1,031, 1,03;1, 1,151, 1,15;1, 1,081, 1,08;1, 6,2718, 6271 6,27;18, 2017- 76,5; 1,101 1,10;1 1,071 1,07;1 1,051 1,05;1 1.0 1,031 1,03;1 1,151 1,15;1 1,081 1,08;1 6,2718 6,27;18 1,10; 1,07; 1,05; 1. 1,03; 1,15; 1,08; 6,271 6,27;1 6,27;

ABSTRACT Objective To analyze measles, mumps, and rubella vaccination coverage among children up to 24 months old and factors associated with non-vaccination in a 2017−2018 live birth cohort, in state capitals and large interior region cities in Northeast Brazil. Methods Population-based survey analyzing vaccination coverage and sociodemographic factors through logistic regression. Results For 12,137 children, vaccination coverage was 79.3% (95%CI 76.5;81.8), and the dropout rate was 10.6%. Association with non-vaccination: socioeconomic stratum A (OR-a 1.29; 95%CI 1.10;1.50), living in the interior region (OR-a 1.22; 95%CI 1.07;1.39), no access to the Bolsa Família Program (OR-a 1.19, 95%CI 1.05;1.34), family income ≤BRL 1,000 (OR-a 1.17, 95%CI 1.03;1.31), mother not working (OR-a 1.28, 95%CI 1.15;1.42), >1 child per mother (OR-a 1.12, 95%CI 1.08;1.17), and no vaccination card (OR-a 10.69, 95%CI 6.27;18.20). Conclusion Low vaccination coverage and a high dropout rate in state capitals and municipalities in the interior region of Northeast Brazil. measles mumps 2 nonvaccination non 20172018 2017 2018 2017−201 cohort Brazil Populationbased Population based regression 12137 12 137 12,13 793 79 3 79.3 95CI CI 95 76.581.8, 765818 76.5 81.8 , 76 5 81 8 76.5;81.8) 106 10 6 10.6% ORa OR 1.29 129 1 29 1.101.50, 110150 1.10 1.50 50 1.10;1.50) 1.22 122 22 1.071.39, 107139 1.07 1.39 07 39 1.07;1.39) 119 19 1.19 1.051.34, 105134 1.05 1.34 05 34 1.05;1.34) BRL 1000 000 1,00 117 17 1.17 1.031.31, 103131 1.03 1.31 03 31 1.03;1.31) 128 28 1.28 1.151.42, 115142 1.15 1.42 15 42 1.15;1.42) > 112 1.12 1.081.17, 108117 1.08 08 1.08;1.17) 1069 69 10.69 6.2718.20. 6271820 6.27 18.20 . 27 18 20 6.27;18.20) 2017201 201 2017−20 1213 13 12,1 7 79. 9 581 76.581.8 76581 765 76. 818 81. 76.5;81.8 10.6 1.2 101 1.101.50 11015 110 1.1 150 1.5 1.10;1.50 071 1.071.39 10713 107 1.0 139 1.3 0 1.07;1.39 11 051 1.051.34 10513 105 134 1.05;1.34 100 00 1,0 031 1.031.31 10313 103 131 1.03;1.31 151 1.151.42 11514 115 142 1.4 4 1.15;1.42 081 1.081.17 10811 108 1.08;1.17 2718 6.2718.20 627182 627 6.2 1820 18.2 6.27;18.20 201720 2017−2 121 12, 58 76.581. 7658 76.5;81. 10. 1. 1.101.5 1101 1.10;1.5 1.071.3 1071 1.07;1.3 1.051.3 1051 1.05;1.3 1, 1.031.3 1031 1.03;1.3 1.151.4 1151 14 1.15;1.4 1.081.1 1081 1.08;1.1 271 6.2718.2 62718 62 6. 182 18. 6.27;18.2 20172 2017− 76.581 76.5;81 1.101. 1.10;1. 1.071. 1.07;1. 1.051. 1.05;1. 1.031. 1.03;1. 1.151. 1.15;1. 1.081. 1.08;1. 6.2718. 6271 6.27;18. 76.58 76.5;8 1.101 1.10;1 1.071 1.07;1 1.051 1.05;1 1.031 1.03;1 1.151 1.15;1 1.081 1.08;1 6.2718 6.27;18 76.5; 1.10; 1.07; 1.05; 1.03; 1.15; 1.08; 6.271 6.27;1 6.27;

resumen está disponible en el texto completo

https://doi.org/10.1590/s2237-96222024v33e20231296.especial2.en

Measles, mumps and rubella vaccination coverage in capitals and interior region municipalities of Northeast Brazil: a household survey in a cohort of children born in 2017 and 2018
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Maciel, Adjoane Mauricio Silva

; Ramos Jr, Alberto Novaes

; Ferreira, Anderson Fuentes

; Silva, Taynara Lais

; Domingues, Carla Magda Allan Santos

; Saavedra, Ramon da Costa

; Barbosa, Jaqueline Caracas

; França, Ana Paula

; Kerr, Ligia Regina Franco Sansigolo

; Teixeira, Maria da Gloria

; Moraes, José Cássio de

; Silva, Adriana Ilha da

; Ramos Jr., Alberto Novaes

; França, Ana Paula

; Oliveira, Andrea de Nazaré Marvão

; Boing, Antonio Fernando

; Domingues, Carla Magda Allan Santos

; Oliveira, Consuelo Silva de

; Maciel, Ethel Leonor Noia

; Guibu, Ione Aquemi

; Mirabal, Isabelle Ribeiro Barbosa

; Barbosa, Jaqueline Caracas

; Lima, Jaqueline Costa

; Moraes, José Cássio de

; Luhm, Karin Regina

; Caetano, Karlla Antonieta Amorim

; Lima, Luisa Helena de Oliveira

; Antunes, Maria Bernadete de Cerqueira

; Teixeira, Maria da Gloria

; Teixeira, Maria Denise de Castro

; Borges, Maria Fernanda de Sousa Oliveira

; Queiroz, Rejane Christine de Sousa

; Gurgel, Ricardo Queiroz

; Barata, Rita Barradas

; Azevedo, Roberta Nogueira Calandrini de

; Oliveira, Sandra Maria do Valle Leone de

; Teles, Sheila Araújo

; Gama, Silvana Granado Nogueira da

; Mengue, Sotero Serrate

; Simões, Taynãna César

; Nascimento, Valdir

; Araújo, Wildo Navegantes de

Epidemiologia e Serviços de Saúde

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2024, Volume 33 Nº spe2 elocation e20231296

Resumo: En Pt Es | Texto: En Pt Es | PDF: En | PDF: Pt | PDF: Es

resumen está disponible en el texto completo

https://doi.org/10.1590/s2237-96222024v33e20231296.especial2.en

Heterogeneidad de la vegetación en ambientes basálticos del centro de Argentina
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Cantero, Juan José

; Mulko, José

; Núñez, César

; Zeballos, Sebastián R

; Sfragulla, Jorge A

; Amuchastegui, Andrea

; Barboza, Gloria E

; Chiarini, Franco

; Ariza Espinar, Luis

; Bonalumi, Aldo A

; Brandolin, Pablo

; Cabido, Marcelo

Boletín de la Sociedad Argentina de Botánica

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Mar 2017, Volume 52 Nº 1 Páginas 153 - 183

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

The flora and the vegetation of basaltic outcrops of Los Cóndores Mountains, central Argentina, are described. Plant communities were sampled following the Braun-Blanquet methods. The 98 relevés × 272 species matrix was classified through the ISOPAM method. The classification discriminated three main communities occurring in the three different substrates explored in this landscape: Rocky Islands (inselbergs), a Natural Matrix surrounding the Islands and an Agricultural Matrix, surrounding the whole basaltic area. The three communities differed in composition and physiognomy: the Islands were the less disturbed sites, reporting the highest plant species richness and diversity as well as the higher number of endemics, and the lowest number of exotic species. In the other extreme of the disturbance gradient, the Agricultural Matrix showed the opposite patterns and is dominated by annual and perennial herbs, mainly weeds. While the number of aliens is low in the Islands and in the Natural Matrix, almost 50% of the species are exotic in the Agricultural Matrix. The results of this study reveal that the basaltic inselbergs are relevant sites for the conservation of the natural heritage.

Se decribe la flora y la vegetación de pasiajes basálticos de la Sierra de Los Cóndores, Córdoba, Argentina. La vegetación se estudió según criterios de la escuela de Braun-Blanquet; la matriz de 98 inventarios × 272 spp. fue clasificada a través del método ISOPAM. El análisis discrimina tres comunidades correspondientes respectivamente a las tres geoformas relevadas en estos paisajes: Islas rocosas (inselbergs), la Matriz Natural que rodea a las Islas y la Matriz Agrícola que circunda al complejo de paisajes basálticos. Las tres comunidades difieren en su composición florística: las Islas rocosas son los sitios menos perturbados, más ricos en especies, con mayor diversidad, mayor número de especies endémicas y su fisonomía está dominada por formas arbustivas. En el otro extremo, la Matriz Agrícola es la más pobre en especies, la de menor diversidad y endemicidad, y predominan las hierbas perennes y anuales. Las Islas rocosas y la Matriz Natural registran bajos números de especies exóticas en su composición, mientras cerca del 50% de la flora de la matriz agrícola se compone de especies adventicias. Los resultados de este estudio revelan la importancia de las islas rocosas basálticas para la conservación del patrimonio natural de la provincia de Córdoba.

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Embolización de colaterales en niños con cardiopatías congénitas. Experiencia en un centro cardiovascular
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Carvajal, Luis F

; Bretón, César O

; Zapata, Margarita M

; Guzmán, Mónica I

; Ruz, Miguel A

; Donado, Juan R

; Díaz, Luis H

; Lince, Rafael

; Franco, Gloria

Revista Colombiana de Cardiología

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Ago 2014, Volume 21 Nº 4 Páginas 266 - 271

Resumo: Es En | Texto: Es En | PDF: Es | PDF: En

Objetivo: Proceder a un análisis descriptivo de los pacientes a quienes se les realizaron embolizaciones de colaterales por vía percutánea. Materiales y métodos: Se revisaron las historias clínicas de 27 pacientes entre febrero de 2004 y marzo de 2012. Se hace una descripción de las variables analizadas. Resultados:En el período descrito se efectuó la embolización percutánea de 33 colaterales en 27 pacientes. La edad promedio al momento del procedimiento fue de 53 meses (1-143 meses). Al 68% se les había realizado previamente cirugía de Glenn o de Fontan, al 8% fístula Blalock-Taussig y al 24% otros procedimientos quirúrgicos. En el 76% de los casos el vaso embolizado fue una colateral venovenosa, y en el 24% restante, una colateral aortopulmonar. Los dispositivos mecánicos fueron los más utilizados (coils y plug vascular). El Amplatzer Vascular Plug se usó para embolizar colaterales de mayor tamaño. Se obtuvo la oclusión inmediata en el 92% de los casos. No hubo mortalidad asociada con los procedimientos. Discusión y conclusiones: La embolización de colaterales por vía percutánea es un procedimiento seguro y con alta tasa de eficacia. Los dispositivos utilizados mostraron ser igualmente efectivos.

Objective: To perform a descriptive analysis of patients who underwent percutaneous embolization of collateral vessels. Materials and methods: We reviewed the medical records of 27 patients between February 2004 and March 2012, and made a description of the variables analyzed. Results:In the period described, percutaneous embolization of 33 collateral vessels was performed in 27 patients. The mean age at the time of the procedure was 53 months (1-143 months). 68% had previously undergone Glenn or Fontan surgery, 8% Blalock-Taussig shunt and 24% other surgical procedures. In 76% of cases the vessel embolized was a venovenous collateral and in the remaining 24% an aortopulmonary collateral. Mechanical devices were most commonly used (coils and vascular plug). The Amplatzer Vascular Plug was used to embolize larger collateral vessels. Immediate occlusion was obtained in 92% of cases. There was no mortality associated with the procedures. Discussion and conclusions: Percutaneous embolization is a safe procedure with high success rate. The devices used were shown to be equally effective.

https://doi.org/10.1016/j.rccar.2013.05.001 1212 downloads

Functional complementation of a yeast knockout strain by Schistosoma mansoni Rho1 GTPase in the presence of caffeine, an agent that affects mutants defective in the protein kinase C signal transduction pathway
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Aguiar, Pedro HN de

; Santos, Débora N

; Lobo, Francisco P

; Santos, Túlio M

; Macedo, Andréa M

; Pena, Sérgio DJ

; Machado, Carlos R

; Franco, Glória R

Memórias do Instituto Oswaldo Cruz

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Out 2006, Volume 101 Supl. 1 Páginas 323 - 326

Resumo: En | Texto: En | PDF: En

In a previous study, the Schistosoma mansoni Rho1 protein was able to complement Rho1 null mutant Saccharomyces cerevisiae cells at restrictive temperatures and under osmotic stress (low calcium concentration) better than the human homologue (RhoA). It is known that under osmotic stress, the S. cerevisiae Rho1 triggers two distinct pathways: activation of the membrane 1,3-beta-glucan synthase enzymatic complex and activation of the protein kinase C1 signal transduction pathway, promoting the transcription of response genes. In the present work the SmRho1 protein and its mutants smrho1E97P, smrho1L101T, and smrho1E97P, L101T were used to try to clarify the basis for the differential complementation of Rho1 knockout yeast strain by the human and S. mansoni genes. Experiments of functional complementation in the presence of caffeine and in the presence of the osmotic regulator sorbitol were conducted. SmRho1 and its mutants showed a differential complementation of the yeast cells in the presence of caffeine, since smrho1E97P and smrho1E97P, L101T mutants showed a delay in the growth when compared to the yeast complemented with the wild type SmRho1. However, in the presence of sorbitol and caffeine the wild type SmRho1 and mutants showed a similar complementation phenotype, as they allowed yeast growth in all caffeine concentrations tested.

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Production of full-length cDNA sequences by sequencing and analysis of expressed sequence tags from Schistosoma mansoni
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Faria-Campos, Alessandra C

; Moratelli, Fernanda S

; Mendes, Isabella K

; Ortolani, Paula L

; Oliveira, Guilherme C

; Campos, Sérgio V A

; Ortega, J Miguel

; Franco, Glória R

Memórias do Instituto Oswaldo Cruz

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Out 2006, Volume 101 Supl. 1 Páginas 161 - 165

Resumo: En | Texto: En | PDF: En

The number of sequences generated by genome projects has increased exponentially, but gene characterization has not followed at the same rate. Sequencing and analysis of full-length cDNAs is an important step in gene characterization that has been used nowadays by several research groups. In this work, we have selected Schistosoma mansoni clones for full-length sequencing, using an algorithm that investigates the presence of the initial methionine in the parasite sequence based on the positions of alignment start between two sequences. BLAST searches to produce such alignments have been performed using parasite expressed sequence tags produced by Minas Gerais Genome Network against sequences from the database Eukaryotic Cluster of Orthologous Groups (KOG). This procedure has allowed the selection of clones representing 398 proteins which have not been deposited as S. mansoni complete CDS in any public database. Dedicated sequencing of 96 of such clones with reads from both 5' and 3' ends has been performed. These reads have been assembled using PHRAP, resulting in the production of 33 full-length sequences that represent novel S. mansoni proteins. These results shall contribute to construct a more complete view of the biology of this important parasite.

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Clustering of Schistosoma mansoni mRNA sequences and analysis of the most transcribed genes: implications in metabolism and biology of different developmental stages
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Prosdocimi, Francisco

; Faria-Campos, Alessandra C

; Peixoto, Fabiano C

; Pena, Sérgio DJ

; Ortega, José M

; Franco, Glória R

Memórias do Instituto Oswaldo Cruz

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Out 2002, Volume 97 Supl. 1 Páginas 61 - 69

Resumo: En | Texto: En | PDF: En

The study of the Schistosoma mansoni genome, one of the etiologic agents of human schistosomiasis, is essential for a better understanding of the biology and development of this parasite. In order to get an overview of all S. mansoni catalogued gene sequences, we performed a clustering analysis of the parasite mRNA sequences available in public databases. This was made using softwares PHRAP and CAP3. The consensus sequences, generated after the alignment of cluster constituent sequences, allowed the identification by database homology searches of the most expressed genes in the worm. We analyzed these genes and looked for a correlation between their high expression and parasite metabolism and biology. We observed that the majority of these genes is related to the maintenance of basic cell functions, encoding genes whose products are related to the cytoskeleton, intracellular transport and energy metabolism. Evidences are presented here that genes for aerobic energy metabolism are expressed in all the developmental stages analyzed. Some of the most expressed genes could not be identified by homology searches and may have some specific functions in the parasite.

2110 downloads Citado 1 vez em SciELO

Cloning and Molecular Characterization of the Schistosoma mansoni Genes RbAp48 and Histone H4
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Souza, Patrícia P

; Santos, Débora N

; Pena, Sérgio D J

; Franco, Glória R

Memórias do Instituto Oswaldo Cruz

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Out 2002, Volume 97 Supl. 1 Páginas 76 - 84

Resumo: En | Texto: En | PDF: En

The human nuclear protein RbAp48 is a member of the tryptophan/aspartate (WD) repeat family, which binds to the retinoblastoma (Rb) protein. It also corresponds to the smallest subunit of the chromatin assembly factor and is able to bind to the helix 1 of histone H4, taking it to the DNA in replication. A cDNA homologous to the human gene RbAp48 was isolated from a Schistosoma mansoni adult worm library and named SmRbAp48. The full length sequence of SmRbAp48 cDNA is 1036 bp long, encoding a protein of 308 amino acids. The transcript of SmRbAp48 was detected in egg, cercariae and schistosomulum stages. The protein shows 84% similarity with the human RbAp48, possessing four WD repeats on its C-terminus. A hypothetical tridimensional structure for the SmRbAp48 C-terminal domain was constructed by computational molecular modeling using the b-subunit of the G protein as a model. To further verify a possible interaction between SmRbAp48 and S. mansoni histone H4, the histone H4 gene was amplified from adult worm genomic DNA using degenerated primers. The gene fragment of SmH4 is 294 bp long, encoding a protein of 98 amino acids which is 100% identical to histone H4 from Drosophila melanogaster.

1968 downloads

10.

Cloning and characterization of SmZF1, a gene encoding a Schistosoma mansoni zinc finger protein
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Souza, Paulo R Eleutério de

; Valadão, Analina F

; Calzavara-Silva, Carlos E

; Franco, Glória R

; Morais Júnior, Marcos A de

; Abath, Frederico GC

Memórias do Instituto Oswaldo Cruz

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Set 2001, Volume 96 Páginas 123 - 130

Resumo: En | Texto: En | PDF: En

The zinc finger motifs (Cys2His2) are found in several proteins playing a role in the regulation of transcripton. SmZF1, a Schistosoma mansoni gene encoding a zinc finger protein was initially isolated from an adult worm cDNA library, as a partial cDNA. The full sequence of the gene was obtained by subcloning and sequencing cDNA and genomic fragments. The collated gene sequence is 2181 nt and the complete cDNA sequence is 705 bp containing the full open reading frame of the gene. Analysis of the genome sequence revealed the presence of three introns interrupting the coding region. The open reading frame theoretically encodes a protein of 164 amino acids, with a calculated molecular mass of 18,667Da. The predicted protein contains three zinc finger motifs, usually present in transcription regulatory proteins. PCR amplification with specific primers for the gene allowed for the detection of the target in egg, cercariae, schistosomulum and adult worm cDNA libraries indicating the expression of the mRNA in these life cycle stages of S. mansoni. This pattern of expression suggests the gene plays a role in vital functions of different life cycle stages of the parasite. Future research will be directed to elucidate the functional role of SmZF1.

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11.

Characterization of an abundant Schistosoma mansoni transcript with no homologs in the databases
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Meira, Wendell SF

; Franco, Glória R

; Rabelo, Élida ML

; Pena, Sérgio DJ

Memórias do Instituto Oswaldo Cruz

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1998, Volume 93 Supl. 1 Páginas 211 - 213

Resumo: En | Texto: En | PDF: En

1342 downloads

12.

The tegument of Schistosoma mansoni: genes, antigens and the host-parasite relationship
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Xavier, Edneide M

; Lucena-Silva, Norma

; Werkhauser, Roberto P

; Franco, Gloria R

; Santos, Ricardo AA Lira

; Simpson, Andrew JG

; Abath, Frederico GC

Memórias do Instituto Oswaldo Cruz

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1998, Volume 93 Supl. 1 Páginas 85 - 86

Resumo: En | Texto: En | PDF: En

2199 downloads

13.

Update of the Gene Discovery Program in Schistosoma mansoni with the Expressed Sequence Tag Approach
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Rabelo, Élida ML

; Franco, Glória R

; Azevedo, Vasco AC

; Pena, Heloisa B

; Santos, Túlio M

; Meira, Wendell SF

; Rodrigues, Neuza A

; Ortega, José Miguel

; Pena, Sérgio DJ

Memórias do Instituto Oswaldo Cruz

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Set 1997, Volume 92 Nº 5 Páginas 625 - 629

Resumo: En | Texto: En | PDF: En

Continuing the Schistosoma mansoni Genome Project 363 new templates were sequenced generating 205 more ESTs corresponding to 91 genes. Seventy four of these genes (81%) had not previously been described in S. mansoni. Among the newly discovered genes there are several of significant biological interest such as synaptophysin, NIFs-like and rho-GDP dissociation inhibitor

1490 downloads

14.

Evidentiation of Paramyosin (Sm-97) as a Modulating Antigen on Granulomatous Hypersensitivity to Schistosoma mansoni Eggs
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Hirsch, Cristine

; Carvalho-Queiroz, Claudia

; Franco, Gloria R

; Pena, Sergio DJ

; Simpson, Andrew JG

; Goes, Alfredo M

Memórias do Instituto Oswaldo Cruz

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Set 1997, Volume 92 Nº 5 Páginas 663 - 667

Resumo: En | Texto: En | PDF: En

A Schistosoma mansoni adult worm anionic fraction (PIII) has previously been shown to protect mice against challenge infection and to reduce pulmonary and hepatic granulomatous hypersensitivity. Serum from PIII-immunized rabbit was used to screen a lgt11 cDNA library from S. mansoni adult worm in order to identify antigens capable of modulating granulomatous hypersensitivity. We obtained four clones with 400 (Sm-III.11), 900 (Sm-III.16), 1100 (Sm-III.10) and 1300 (Sm-III.12) bp of length. All clone-specific antibodies were able to recognize most of the PIII components. The sequence analysis showed that these clones presented high homology with S. mansoni paramyosin (Sm-97). These findings ascribe a new function to this antigen with an important role in modulation of granulomatous hypersensitivity to S. mansoni eggs

1310 downloads

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