Teachable moment in classrooms:
- endocrine system chapter – role of insulin in lowering high blood sugar levels
- endocrine system chapter – location of insulin-producing beta cells in the pancreas
- immune system chapter – role of T-lymphocytes in the immune system
The news item: Recently the following report appeared online:
FDA approves 1st drug to delay onset of Type 1 diabetes
For the first time, the U.S. Food and Drug Administration on Thursday approved a treatment that can delay the onset of Type 1 diabetes.
The article states that the drug was approved to treat stage 2 type I diabetes in order to avoid progression to stage 3. The article states that type 1 diabetes is a chronic autoimmune condition where the pancreas doesn’t produce insulin. When diagnosed by the detection of autoimmune antibodies, patients develop insulin-dependence within 5 years. Tzield is administered as an infusion. The article also states that 64,000 people in the US are diagnosed with type 1 diabetes each year, and currently 1.6 million people are using insulin.
So, Why Do I Care?? Insufficient production in type 1 diabetics happens to many people, as we see from the statistics in the online report. Large number of current and future patients could benefit if a new treatment could delay the starting point of insulin dependence. Then their lifestyle could be preserved, and the need for injected insulin could be delayed, and the cost to society be reduced.
Plain English, Please!!! First, let’s talk about why type 1 diabetes develops. Our immune system is normally programmed to recognize and then destroy invaders such as bacteria, fungi, viruses, worms, and others. Attack on the body’s own cells is prevented by a set of molecular “hand brakes”. When you apply the hand brake on your car, the car is immobilized, and the same way the CD3 molecules on T-lymphocytes prevent the destruction of the body’s cells. In an autoimmune disorder, such as type I diabetes, the hand brakes are released, and the T-lymphocytes attack and destroy the body’s own cells. In type I diabetes the beta cells of the pancreas are attacked and destroyed. Because the beta cells are the only cells that make the hormone insulin, when they are destroyed, the insulin levels decrease, and lowering a high blood sugar level becomes difficult.
Second, let’s talk about the stages of type 1 diabetes. In stage 1 the immune system is beginning its attack on the beta cells of the pancreas, there are no symptoms yet, but a blood test can discover the signs of an