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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.
111

Clinical findings on chromosome 1 copy number variations

Filipa Batista Ferreira Leitão 30 March 2021 (has links)
Uma grande parte da variabilidade do nosso genoma pode ser atribuída a variações do número de cópias do ADN, nomeadamente deleções e duplicações. A presença destas variações no cromossoma 1, o maior cromossoma humano, é uma causa conhecida de morbilidade. Este estudo tem como objetivo contribuir para o mapa de doenças associadas ao cromossoma 1, através da análise de pacientes com rearranjos neste cromossoma. Foi feita uma seleção transversal, a partir da base de dados do Departamento de Genética da Faculdade de Medicina da Universidade do Porto, dos pacientes que realizaram estudo genético por array-CGH e que obtiveram como resultado alterações do no cromossoma 1 consideradas patogénicas ou provavelmente patogénicas. Foram avaliados os dados clínicos destes pacientes. As alterações genéticas encontradas foram pesquisadas em bases de dados nacionais e internacionais de referência assim como na literatura para classificação e para permitir o estabelecimento de uma correlação entre o genótipo e o fenótipo. De um total de 2516 pacientes incluídos na base de dados, identificámos 24 (0.95%) com variantes no cromossoma 1, 9 patogénicas e 15 provavelmente patogénicas. Estas corresponderam a 6,1% (24/392) do total de variantes patogénicas e provavelmente patogénicas incluídas na base de dados. A região 1q21.1 foi a região com mais alterações genéticas associadas, tanto deleções como duplicações, sendo que algumas destas alterações se estendiam até à região 1q21.2. Este estudo permitiu fortalecer a associação entre alterações genéticas do número de cópias no cromossoma 1 e doenças do neurodesenvolvimento, assim como dismorfismos craniofaciais. Adicionalmente, permitiu reforçar a ideia de que nem sempre será fácil interpretar estas variantes e estabelecer uma associação entre o genótipo e o fenótipo, uma vez que existe um largo espectro entre o que é considerado benigno e o que é claramente patogénico. / Copy number variants (CNVs) are a major contribution to genome variability, and the presence of CNVs on chromosome 1 is a known cause of morbidity. The main objective of this study was to contribute for chromosome 1 disease map, through the analysis of patients with chromosome 1 CNVs. A cross-sectional study was performed using the array comparative genomic hybridization (array-CGH) database of the Genetic Department of the Faculty of Medicine. Patients with pathogenic (P) or probably pathogenic (VOUS-PP) CNVs on chromosome 1 were selected for the study. Clinical information was collected for all patients. Databases and related literature were used for genotype-phenotype correlation. From a total of 2516 patients included in the database we identified 24 patients (0.95%) with P (9 patients) or VOUS-PP (15 patients) CNVs on chromosome 1. These CNVs account for 6.1% (24/392 CNVs) of the total P/VOUS-PP CNVs in the database. Most common CNVs found were on 1q21.1-1q21.2 region. This study reinforces the association between chromosome 1 CNVs and neurodevelopmental disorders and craniofacial dysmorphisms. Additionally, it also strengthened the idea that CNVs interpretation is not always a linear task due to the broad spectrum of variants that can be identified between benign and clearly pathogenic CNVs.
112

MicroRNAs: mediators of EGFR targeted therapy resistance in renal cell carcinoma

Nuno Ricardo Alves Bastos 09 January 2017 (has links)
No description available.
113

The Synthetic Cathinone α-Pyrrolidinovalerophenone (α-PVP): Pharmacokinetic and Pharmacodynamic Clinical and Forensic Aspects

Leandro José Abreu Nóbrega 07 June 2018 (has links)
No description available.
114

Early molecular pulmonary effects in an animal model of chronic left pressure overload

Carla Daniela Campinho Ferreira 28 March 2019 (has links)
No description available.
115

Calreticulin in the Heart: From Embryological Development to Cardiac Pathology

Daniel Martinho Ferreira Dias 06 June 2017 (has links)
No description available.
116

Formação de substâncias tóxicas durante a anestesia inalatória

Maria Inês Neto Machado Pantaleão 10 July 2017 (has links)
No description available.
117

Assessment in Anatomy Courses: How Does Student Performance in Computerized Assessment Compares with the Traditional Pen-and-Paper Method?

José Rui Coelho Ribeiro 05 June 2018 (has links)
No description available.
118

Brain: a victim of the Heart? Effects of Heart Failure with Preserved Ejection Fraction in the Hippocampal Formation of adult rats

Débora Inês Vilas Boas Costa 09 April 2021 (has links)
Heart Failure (HF) is a devastating disease with an increasing incidence that is associated with multiple comorbidities. Cognitive impairment (CI) is one of the most common coexisting chronic conditions in HF. Despite this strong association, the underlying pathophysiological mechanisms remain unknown, especially in HF with Preserved Ejection Fraction (HFpEF). We evaluated the effects of HFpEF on microglia and astrocyte activation and neuroinflammation in the hippocampal formation, a fundamental brain region in cognitive functions. The study was conducted on ZSF1‐Lean and ZSF1‐Obese rats, a metabolic risk-related HFpEF animal model. Animals were evaluated periodically through echocardiography. The numerical density of GFAP- and CD11b-immunoreactive cells in hippocampal formation were estimated using stereological procedures. Cytokine mRNA relative expression was measured. 30 week-old ZSF1-Obese rats showed an elevated left ventricular (LV) end-diastolic pressure, a higher LV mass and a higher E/E' ratio than ZSF1-Lean rats but similar ejection fraction, confirming the cardiac HFpEF phenotype in ZSF1-Obese rats. The numerical density of GFAP- and CD11b-positive cells in all of the hippocampal formation subfields were identical between groups. Although ZSF1-Obese and ZSF1-Lean rats showed no significant differences in IL-1β, IL-6 and COX-2 gene expression, expression of TNF-α was significantly increased in ZSF1-Obese rats. Our results suggest that in ZSF1‐Obese rats, an experimental model of HFpEF, there is no induction of microglial or astrocyte activation in the hippocampal formation, although there was a glial shift towards a pro-inflammatory phenotype.
119

Relação entre os valores de monitorização ambulatória da pressão arterial e as lesões micro e macrovasculares numa coorte de pacientes hipertensos diabéticos tipo 2 e não-diabéticos

Carmen Patrícia Leite Ferreira 14 February 2017 (has links)
No description available.
120

Role of epithelial ion transports in inflammatory bowel disease

Diogo António Moutinho Magalhães 04 July 2017 (has links)
No description available.

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