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Evaluation of the fatty acid profile in patients treated with orlistat, using GC/MS and 1H NMR

Grant number: 10/04315-8
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2010
Effective date (End): February 29, 2012
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Organic Chemistry
Principal researcher:Anita Jocelyne Marsaioli
Grantee:Thiago Inácio Barros Lopes
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Obesity is a disease characterized by excessive accumulation of body fat associated with health problems. Several drugs have been studied for the control of obesity, such as orlistat, which reduces the absorption of dietary lipids through the inhibition of lipases. The inactivated enzyme is unable to hydrolyze triglycerides, the main class of lipids present in the diet, fatty acids and monoglycerides absorbable as well as 30% of ingested fat is excreted in faeces, contributing to weight reduction. This project aims to evaluate changes in lipid composition of erythrocyte membrane and blood plasma resulting from treatment with orlistat. The understanding of these changes not only helps us to investigate changes in metabolic markers, but also provides a guide to clinical management of obesity. So we perform a measurement of cholesterol esters and phospholipids by GC / MS before and during treatment, and the analysis of cholesterol and blood plasma metabolomics, in search of new biomarkers suitable to monitor treatment, both by 1H NMR. Data analysis will be done by analysis of variance (ANOVA) and the NMR spectra of 1H will be submitted to analysis of PCA and PLS-DA in search of new biomarkers.

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
LOPES, Thiago Inácio Barros. Evaluation of fatty acid prodile in overweight subjects treated with orlistat applied GC-Em and evaluation of metabolic profile of plasma by 1H NMR. 2012. Master's Dissertation - Universidade Estadual de Campinas (UNICAMP). Instituto de Química.

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