3 research outputs found

    Epidemiología molecular y anålisis filogenético de la infección por el virus del papiloma humano en mujeres con lesiones cervicales y cåncer en la región litoral del Ecuador

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    The aim of the present study was to gather information regarding the molecular epidemiology of Human papillomavirus (HPV) and related risk factors in a group of women with low- and high-grade cervical lesions and cancer from the coastal region of Ecuador. In addition, we studied the evolution of HPV variants from the most prevalent types and provided a temporal framework for their emergence, which may help to trace the source of dissemination within the region. We analyzed 166 samples, including 57 CIN1, 95 CIN2/3 and 14 cancer cases. HPV detection and typing was done by PCR-sequencing (MY09/MY11). HPV variants and estimation of the time to most recent common ancestor (tMRCA) was assessed through phylogeny and coalescence analysis. HPV DNA was found in 54.4% of CIN1, 74.7% of CIN2/3 and 78.6% of cancer samples. HPV16 (38.9%) and HPV58 (19.5%) were the most prevalent types. Risk factors for the development of cervical lesions/cancer were the following: three or more pregnancies (OR = 4.3), HPV infection (OR = 3.7 for high-risk types; OR = 3.5 for HPV16), among others. With regard to HPV evolution, HPV16 isolates belonged to lineages A (69%) and D (31%) whereas HPV58 isolates belonged only to lineage A. The period of emergence of HPV16 was in association with human populations (tMRCA = 91. 052 years for HPV16A and 27. 000 years for HPV16D), whereas HPV58A preceded Homo sapiens evolution (322. 257 years). This study provides novel data on HPV epidemiology and evolution in Ecuador, which will be fundamental in the vaccine era.Fil: Bedoya Pilozo, Cesar H.. Escuela Superior PolitĂ©cnica del Litoral; Ecuador. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Medina MagĂŒes, Lex G.. Escuela Superior PolitĂ©cnica del Litoral; EcuadorFil: Espinosa GarcĂ­a, Maylen. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: SĂĄnchez, Martha. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Parrales Valdiviezo, Johanna V.. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Molina, Denisse. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Ibarra, MarĂ­a A.. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Quimis Ponce, MarĂ­a. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: España, Karool. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: PĂĄrraga Macias, Karla E.. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Cajas Flores, Nancy V.. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Solon, Orlando A.. Instituto Nacional de Investigaciones en Salud PĂșblica; Ecuador. Universidad Agraria del Ecuador; EcuadorFil: Robalino Penaherrera, Jorge A.. Instituto Nacional de Investigaciones en Salud PĂșblica; EcuadorFil: Chedraui, Peter. Hospital Gineco-ObstĂ©trico Enrique C. Sotomayor; EcuadorFil: Escobar, Saul. Universidad CatĂłlica de Guayaquil; EcuadorFil: Loja Chango, Rita D.. Universidad CatĂłlica de Guayaquil; EcuadorFil: Ramirez MorĂĄn, Cecibel. Universidad CatĂłlica de Guayaquil; EcuadorFil: Espinoza Caicedo, Jasson. Universidad CatĂłlica de Guayaquil; EcuadorFil: SĂĄnchez Giler, Sunny. Universidad Especialidades EspĂ­ritu Santo. Facultad de Ciencias MĂ©dicas; EcuadorFil: Limia, Celia M.. Instituto de Medicina Tropical Pedro Kouri; CubaFil: AlemĂĄn, Yoan. Instituto de Medicina Tropical Pedro Kouri; CubaFil: Soto, Yudira. Instituto de Medicina Tropical Pedro Kouri; CubaFil: Kouri, Vivian. Instituto de Medicina Tropical Pedro Kouri; CubaFil: Culasso, AndrĂ©s Carlos Alberto. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - Nordeste; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂ­mica. Departamento de MicrobiologĂ­a, InmunologĂ­a y BiotecnologĂ­a. CĂĄtedra de VirologĂ­a; ArgentinaFil: Badano, Ines. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - Nordeste; Argentina. SecretarĂ­a de EducaciĂłn Superior, Ciencia, TecnologĂ­a e InnovaciĂłn; Ecuador. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, QuĂ­micas y Naturales. Laboratorio de BiologĂ­a Molecular Aplicada; Argentin

    PEQUENO GUIA AOS PROBLEMAS DA EDUCAÇÃO NO BRASIL: ANÁLISE E BIBLIOGRAFIA SELECIONADA. MALVINA ROSAT MCNEILL, PH.D. - 1970

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