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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, OBJECTIVE, METHODS, RESULTS. Meshes: Adult, Aged, Alleles, Female, Gene Frequency, Humans, Interleukin-4, Leukocytes, Mononuclear, Lipopolysaccharides, Male, Middle Aged, Polymorphism, Genetic, Promoter Regions, Genetic, Tumor Necrosis Factor-alpha, Vascular Endothelial Growth Factor A, Young Adult.
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Is vascular endothelial growth factor production regulated by gene polymorphisms? Context: Vascular endothelial growth factor (VEGF) has a key role in angiogenesis and in transplantation. The level of VEGF is related to the differences in the DNA sequence of its promoter region. In this study, the association between the combination of VEGF -1154 G and -2578 C alleles and VEGF production by LPS-stimulated PBMCs was investigated. In addition; the relationship between VEGF polymorphisms and the influence of TNF- and IL-4 on VEGF production was studied. VEGF -1154 G/A and -2578 C/A were detected using ARMS-PCR. To determine the impact of combinations of these two polymorphisms on VEGF production; PBMCs were stimulated by LPS and VEGF production was measured by ELISA. The combinations of -1154 GG/-2578 CC and -1154 GG/-2578 CA were significantly associated with higher VEGF production (p<0.0001). Production of VEGF was significantly influenced by TNF- in individuals who had certain VEGF genotype combinations. Although VEGF production was dramatically suppressed by IL-4, it was not dependent on VEGF genotype.
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Since TNF- has influence on the graft outcome, to avoid allocation of grafts from high TNF- producer donors to recipients, it might be useful to predict and minimize graft rejection by having prior knowledge of TNF- and also VEGF genotypes especially -1154 G/A and -2578 C/A VEGF. Final Decision: yes