A Link Between Obesity And Risk Of Type 2 Diabetes
Now, the researchers from the University of Texas Southwestern Medical Center have identified the mechanism behind the development of type 2 diabetes associated with obesity.
The pancreas secretes insulin, and insulin helps us in delivering glucose and oxygen from the bloodstream to cells to produce energy. Most of the glucose produced by the liver will be consumed by the muscles.
The researchers have found that the insulin in the obese people was unable to pass through the cells that form the inner lining of blood vessels. As insulin could not deliver the glucose to cells, blood glucose levels increase, leading to insulin resistance and type 2 diabetes. A high blood sugar (glucose) levels is a risk factor for kidney, blood vessels (arteries) and vision loss diseases.
The immunoglobulins, large Y-shaped antibody proteins, help a neutralizing immune response against the external viruses and bacteria. Researchers say that the delivery of glucose by the insulin to muscle with the help of immunoglobulins is the main cause of the development of type 2 diabetes associated with obesity in the people.
In a trial involving obese mice models, the researchers have found an enzyme needed for the transfer of insulin (with glucose and oxygen) from the blood to muscle was prevented due to an unpredictable chemical change in the immunoglobulins. A non-diabetic mouse will become a diabetic if it receives immunoglobulins from a mouse model of type 2 diabetes. Researchers say that an obese person is at a similar risk of type 2 diabetes due to the chemical changes in the immunoglobulins.
In the study, researchers have identified an agent that can prevent an unexpected chemical change in the immunoglobulins. Researchers are successful in testing the agent in preventing the high blood sugar (glucose) levels on mice models. Now, the researchers are planning to experiment on humans.
Co-senior author of the study was Dr. Chieko Mineo, Ph.D., Associate Professor of Pediatrics, the University of Texas Southwestern Medical Center, Dallas, the United States. The study was published on November 27, 2017, in the journal of clinical investigation. Title of the article was "Hyposialylated IgG activates endothelial IgG receptor FcγRIIB to promote obesity-induced insulin resistance."
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Published by Jammi Vasista, Chennai, India.