Blood sugar level several interacting systems, of which hormone regulation is the most important. There are two types of mutually antagonistic metabolic hormones affecting blood glucose levels: These hormones are secreted from pancreatic islets which are bundles of endocrine tissues. There are four types of pancreatic islets, alpha (A) cells, beta (B) cells, Delta (D) cells and F cells. Glucagon is secreted from alpha cells, while insulin is secreted by beta cells. Together they regulate the blood-glucose levels through negative feedback, a process where the end product of one reaction stimulates the beginning of another reaction. In blood-glucose levels, insulin lowers the concentration
Genetic causes of diabetes mellitus type 2 like APOM and APM1 increase the risk of type 2 diabetes when there are SNPs in their proximal promoter regions. Promoters are sequences of DNA that allows proteins such as transcription factors to bind for gene expression, and when the sequences are modified, the proteins no longer bind as effectively, resulting in depressed level of gene expression. APOM is partly responsible for producing pre beta-high-density lipoprotein and cholesterol, and APM1 is responsible for regulating glucose level in blood and fatty acid. Decreasing the level these gene products reduce the body's ability to handle glucose, which leads to the increased risk