The Effects of VEGF-B Signaling Pathway in Obesity and Metabolic Disease

The investigators will enroll about 120 subjects from the hospital's healthcare center, and these 120 subjects will be divided into four groups: normal weight with or without metabolic diseases and obesity with or without metabolic diseases. Each group has 30 subjects. The investigators will collect the basic information(name, gender，age, medical history，family history, etc.), blood pressure, body mass index, fasting blood glucose and fasting blood lipids of each subject from the healthcare center. The investigators will collect the blood samples of each subject,separate the plasma and then test the fasting insulin, VEGF-B levels by ELISA. The investigators will separate the peripheral blood mononuclear cells from the blood, and then test the gene promoter region methylation status of the VEGF -B gene by PCR and the bisulfite-modified sequencing and test the genomic protein methylation level of the VEGF-B gene by chromatin immunoprecipitation assay(CHIP) and real-time quantitative PCR of the cells，and finally do the statistical analysis.