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| Author(s): |
Erica Oki
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Saúde Pública (FSP/CIR) |
| Defense date: | 2015-06-26 |
| Examining board members: |
Marcelo Macedo Rogero;
Dirce Maria Lobo Marchioni;
Thomas Prates Ong
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| Advisor: | Marcelo Macedo Rogero |
| Abstract | |
Introduction: Genetics variation can influence the relation between fatty acids (FA) and inflammatory biomarkers levels. Objective: To verify the association between Single Nucleotide Polymorphisms (SNP) in adiponectin, C-Reactive Protein (CRP), Tumor Necrosis Factor (TNF)- and Interleukin (IL)-10 genes and plasma fatty acids and their effects to a systemic inflammatory pattern at a population-based study. Methods: Sociodemographics information, life style, physical activity (IPAQ long form), smoking and drinking habits, as well as blood samples of 281 individuals (20 years 59 years) participants of a population based study (ISA-Capital). Plasma IL1, IL6, IL8, IL10, TNF, IL12p70, adiponectin, CRP, soluble monocyte chemoattractant protein-1 (sMCP-1), soluble intercellular adhesion molecule-1 (sICAM-1) and soluble vascular cell adhesion molecule 1 (sVCAM-1) levels were measured using a multiplex immunoassay and the fatty acid profile was measured by gas chromatography. The DNA was extracted and genotyping of SNP in CPR gene (rs1205, rs1417938, rs2808630), TNF (rs1799964, rs1799724, rs1800629 e rs361525) and IL10 (rs1800871, rs1800896 e rs1800872) was analyzed by TaqMan Open Array. Multivariate cluster analysis was applied on 11 inflammatory biomarkers, allowing to group individuals in inflammatory (INF) or non-inflammatory (NINF) group. Results: Individuals with GA+AA genotypes of SNP -238 G>A (rs361525) of TNF- gene had higher levels of TNF-, IL-1, IL-6, IL-10 and IL-12 compared to GG genotype. Besides that, recessive homozygous of SNP e/i boundary C>T (rs1554286) of IL-10 gene presented higher level of IL-1 and TNF- and lower level of sMCP-1 in relation to dominant homozygous. The INF group had significantly higher age, waist circumference, blood pressure, and total cholesterol than NINF group. Concerning fatty acid profile, INF group had palmitic acid (C16:0), saturated fatty acid (SFA)/omega-6 (n-6) polyunsaturated fatty acid (PUFA) ratio, SFA/PUFA and estimated enzyme activity of stearoyl-CoA desaturase (SCD) levels higher and PUFA, n-6, arachidonic acid and estimated enzyme activity of delta-5 desaturase (D5D) levels lower than NINF group. Significantly interactions were found between of SNP +1919 A>T (rs1417938) of PCR and C16:1n-7, SFA/n-6 and SFA/PUFA; between SNP +3872 G>A (rs1205) of PCR gene and C16:1n-7; between SNP e/i boundary C>T (rs1554286) of IL-10 and estimated enzyme activity of delta-6 desaturase (D6D); and between SNP -1082 A>G (rs1800896) of IL-10 gene and C18:0, C14:0 and estimated D5D activity. Conclusion: The SNP analyzed have associations with inflammatory biomarkers, and plasma palmitic, SFA/n-6, SFA/PUFA, SCD- 18 were positively associated with inflammatory pattern, while PUFA, n-6, arachidonic acid and D5D were negatively associated. Interactions were founded with palmitoleic and SFA/PUFA with +1919.A>T (rs1417938), and stearic and myristic acids and D5D with 1082 A>G. (AU) | |
| FAPESP's process: | 13/01741-4 - Association between single nucleotide polymorphism in genes of CRP, TNF-alfa and IL-10 and plasma fatty acids and their effect to a systemic inflammatory patter at a population-based study - ISA-Capital |
| Grantee: | Érica Oki |
| Support Opportunities: | Scholarships in Brazil - Master |