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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Características genéticas de pacientes com hipertensão arterial pulmonar associada à  esquistossomose / Genetic characteristics of patients with pulmonary arterial hypertension associated with schistosomiasis

Oleas, Francisca Alexandra Gavilanes 28 May 2018 (has links)
Introdução: Vários genes, particularmente os envolvidos na via de transcrição Transforming Growth Factor beta, estão claramente associados ao risco de desenvolvimento de hipertensão arterial pulmonar. Entretanto, pouco ou quase nada se sabe sobre a existência de fatores genéticos que possam estar associados a uma das formas mais prevalentes de hipertensão arterial pulmonar no mundo, a hipertensão arterial pulmonar associada a esquistossomose (HAP-Sch). O objetivo deste estudo foi avaliar a associação dos genes já descritos na hipertensão arterial pulmonar idiopática (HAPI) com a HAP-Sch. Método: Estudo transversal, comparando amostras de pacientes seguidos no ambulatório de Circulação Pulmonar no Instituto do Coração do HCFMUSP, com diagnóstico de HAP-Sch ou HAPI. Foram avaliadas as características genéticas nestes grupos quanto à presença de variantes patogênicas dos genes:BMPR2, ACVRL1, KCNK3, KCNK5, CAV-1, CBLN2, ENG, andSMAD9. Resultados: Foram incluídos 69 pacientes com HAP-Sch e 74 pacientes com HAPI. O grupo HAP-Sch apresentou idade mais avançada (52.1 ± 11.8 vs 41.5 ± 15.0; p = < 0,001) e débito cardíaco mais preservado ao diagnóstico (4.7 ± 1.9 vs 4.0 ± 1.4 p = 0.019). Cerca de 24% dos pacientes com HAPI apresentaram resposta aguda durante o teste de vasorreatividade, enquanto nenhum paciente com HAP-Sch apresentou resposta (p =< 0.001). Pacientes com HAP-Sch apresentaram 7% de variantes patogênicas, comparado com11% dos HAPI(p=0,782). Em ambos os grupos, pacientes portadores de variantes patogênicas possuíam características clínicas e hemodinâmicas semelhantes aos demais pacientes. No grupo HAP-Sch, a sobrevida dos portadores de variantes patogênicas foi significativamente menor (p=0.035). Conclusão: A prevalência de variantes patogênicas na HAP-Sch é semelhante à encontrada na HAPI e, da mesma forma, sua presença está associada a pior prognóstico / Background: Several genes, mainly those involved with the Transforming Growth Factor ? transcription pathway, are well-defined as risk factors for developing pulmonary arterial hypertension. Nevertheless, little is known about the existence of a genetic background associated with one of the most prevalent forms of pulmonary arterial hypertension worldwide, which is schistosomiasis associated pulmonary arterial hypertension (Sch-PAH). The aim of this study was to evaluate the association of genes already described in idiopathic pulmonary arterial hypertension (IPAH) with Sch-PAH. Method: A cross-sectional study comparing samples from patients followed at the Pulmonary Circulation clinic at the Heart Institute of HCFMUSP, diagnosed as Sch-PAH or IPAH. Genetic characteristics in these groups were evaluated for the presence of pathogenic variants of the genes: BMPR2, ACVRL1, KCNK3, KCNK5, CAV-1, CBLN2, ENG, and SMAD9.Results: A total of 69 patients with Sch-PAH and 74 patients with IPAH were included. The Sch-PAH group presented older age (52.1 ± 11.8 vs 41.5 ± 15.0, p =< 0.001) and higher cardiac output at diagnosis (4.7 ± 1.9 vs 4.0 ± 1.4 p = 0.019). About 24% of patients with IPAH presented acute response during the vasoreactivity test, whereas no Sch-PAH patient presented response (p = < 0.001). Patients with PAH-Sch had 7% prevalence of pathogenic variants, compared to 11% in IPAH (p = 0.782). In both groups, patients with pathogenic variants had clinical and hemodynamic characteristics similar to the other patients. In the Sch-PAH group, the survival of patients with pathogenic variants was significantly lower (p = 0.035). Conclusion: The prevalence of pathogenic variants in Sch-PAH is similar to that found in IPAH and, likewise, its presence is associated with worse prognosis
2

Características genéticas de pacientes com hipertensão arterial pulmonar associada à  esquistossomose / Genetic characteristics of patients with pulmonary arterial hypertension associated with schistosomiasis

Francisca Alexandra Gavilanes Oleas 28 May 2018 (has links)
Introdução: Vários genes, particularmente os envolvidos na via de transcrição Transforming Growth Factor beta, estão claramente associados ao risco de desenvolvimento de hipertensão arterial pulmonar. Entretanto, pouco ou quase nada se sabe sobre a existência de fatores genéticos que possam estar associados a uma das formas mais prevalentes de hipertensão arterial pulmonar no mundo, a hipertensão arterial pulmonar associada a esquistossomose (HAP-Sch). O objetivo deste estudo foi avaliar a associação dos genes já descritos na hipertensão arterial pulmonar idiopática (HAPI) com a HAP-Sch. Método: Estudo transversal, comparando amostras de pacientes seguidos no ambulatório de Circulação Pulmonar no Instituto do Coração do HCFMUSP, com diagnóstico de HAP-Sch ou HAPI. Foram avaliadas as características genéticas nestes grupos quanto à presença de variantes patogênicas dos genes:BMPR2, ACVRL1, KCNK3, KCNK5, CAV-1, CBLN2, ENG, andSMAD9. Resultados: Foram incluídos 69 pacientes com HAP-Sch e 74 pacientes com HAPI. O grupo HAP-Sch apresentou idade mais avançada (52.1 ± 11.8 vs 41.5 ± 15.0; p = < 0,001) e débito cardíaco mais preservado ao diagnóstico (4.7 ± 1.9 vs 4.0 ± 1.4 p = 0.019). Cerca de 24% dos pacientes com HAPI apresentaram resposta aguda durante o teste de vasorreatividade, enquanto nenhum paciente com HAP-Sch apresentou resposta (p =< 0.001). Pacientes com HAP-Sch apresentaram 7% de variantes patogênicas, comparado com11% dos HAPI(p=0,782). Em ambos os grupos, pacientes portadores de variantes patogênicas possuíam características clínicas e hemodinâmicas semelhantes aos demais pacientes. No grupo HAP-Sch, a sobrevida dos portadores de variantes patogênicas foi significativamente menor (p=0.035). Conclusão: A prevalência de variantes patogênicas na HAP-Sch é semelhante à encontrada na HAPI e, da mesma forma, sua presença está associada a pior prognóstico / Background: Several genes, mainly those involved with the Transforming Growth Factor ? transcription pathway, are well-defined as risk factors for developing pulmonary arterial hypertension. Nevertheless, little is known about the existence of a genetic background associated with one of the most prevalent forms of pulmonary arterial hypertension worldwide, which is schistosomiasis associated pulmonary arterial hypertension (Sch-PAH). The aim of this study was to evaluate the association of genes already described in idiopathic pulmonary arterial hypertension (IPAH) with Sch-PAH. Method: A cross-sectional study comparing samples from patients followed at the Pulmonary Circulation clinic at the Heart Institute of HCFMUSP, diagnosed as Sch-PAH or IPAH. Genetic characteristics in these groups were evaluated for the presence of pathogenic variants of the genes: BMPR2, ACVRL1, KCNK3, KCNK5, CAV-1, CBLN2, ENG, and SMAD9.Results: A total of 69 patients with Sch-PAH and 74 patients with IPAH were included. The Sch-PAH group presented older age (52.1 ± 11.8 vs 41.5 ± 15.0, p =< 0.001) and higher cardiac output at diagnosis (4.7 ± 1.9 vs 4.0 ± 1.4 p = 0.019). About 24% of patients with IPAH presented acute response during the vasoreactivity test, whereas no Sch-PAH patient presented response (p = < 0.001). Patients with PAH-Sch had 7% prevalence of pathogenic variants, compared to 11% in IPAH (p = 0.782). In both groups, patients with pathogenic variants had clinical and hemodynamic characteristics similar to the other patients. In the Sch-PAH group, the survival of patients with pathogenic variants was significantly lower (p = 0.035). Conclusion: The prevalence of pathogenic variants in Sch-PAH is similar to that found in IPAH and, likewise, its presence is associated with worse prognosis

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