Título principal
Variantes genéticas do MC4R [recurso eletrônico] : implicações na fisiopatologia da obesidade / Bruno Fonseca Nunes ; orientadora, Fabíola Branco Filippin Monteiro
Data de publicação
2024
Descrição física
113 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Farmácia, Florianópolis, 2024.
Inclui referências.
Variantes genéticas do MC4R [recurso eletrônico] : implicações na fisiopatologia da obesidade / Bruno Fonseca Nunes ; orientadora, Fabíola Branco Filippin Monteiro
Data de publicação
2024
Descrição física
113 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Farmácia, Florianópolis, 2024.
Inclui referências.
Assunto
Farmácia
Responsabilidade
Nunes, Bruno Fonseca
Monteiro, Fabíola Branco Filippin
Universidade Federal de Santa Catarina. Programa de Pós-Graduação em Farmácia
Idioma
Português
Farmácia
Responsabilidade
Nunes, Bruno Fonseca
Monteiro, Fabíola Branco Filippin
Universidade Federal de Santa Catarina. Programa de Pós-Graduação em Farmácia
Idioma
Português
Abstract: MC4R stands out within the family of G protein-coupled receptors as a crucial transmembrane receptor. Upon activation by its ligand, this receptor initiates a signalling cascade that primarily modulates the expression of neuropeptides involved in regulating feeding behaviour and hunger in individuals. Consequently, obesity poses a complex challenge, driven by excessive accumulation of adipose tissue stemming from dysregulation in hunger and satiety signalling pathways. Various factors contribute to this dysregulation, leading to a range of clinical complications. Genetic studies have pinpointed variants in the MC4r gene as significant contributors to monogenic obesity in humans. Our research aimed to comprehensively investigate these genetic variants within MC4r using publicly available datasets, with a particular focus on variants with conflicting interpretations of pathogenicity and uncertain significance. We conducted analyses to predict the phenotypic effects of single nucleotide polymorphisms (SNPs), employing biochemical and structural analyses as well as assessing their impact on protein stability. Out of the 84 variants found in the ClinVar platform, 15 were considered deleterious by PredictSNP, and out of the 350 found in dbSNP, 10 were predicted to contain deleterious effects. For these 25 variants, analyses were conducted to determine their effects on the protein (evolutionary conservation, stability, structural, and functional effects) using distinct platforms. Finally, we integrated our findings into a model that elucidates the interaction between MC4R and its receptor agonist, Setmelanotide. Through this analysis, we not only identified the specific amino acids for the binding of Setmelanotide to the protein but also shed light on the pharmacogenomics of Setmelanotide response in the context of different MC4R variants. This study contributes significantly to our understanding of personalized medicine approaches in addressing MC4R-related obesity, paving the way for tailored therapeutic interventions based on individual genetic profiles.