Insulin was discovered in 1921 and since then has transformed diabetes from a fatal condition to one that can be managed successfully. However, even with centuries of medical advances, insulin therapy still presents significant challenges. It can be incredibly inconvenient for those with diabetes to constantly monitor blood glucose levels, calculate insulin doses and balance diet, exercise and illness. Even with all of our modern technology, such as glucose monitors, maintaining stable blood sugar levels proves difficult.
This is where smart insulin comes in: a new promising idea that scientists have pursued. It is sometimes referred to as glucose-responsive insulin and is designed to automatically adjust its activity in response to changes in blood glucose levels. If this works, it could transform diabetes management by reducing the need for constant monitoring and lowering the risk of complications.
WHY IS CURRENT INSULIN THERAPY CHALLENGING?
Specialised cells in the pancreas continuously monitor blood glucose levels and release insulin when needed. This allows the concentration of glucose in the bloodstream to remain relatively stable. This is the case in a healthy individual. Someone who has type 1 diabetes has an immune system that destroys these insulin-producing cells, which means insulin must be externally supplied. People with advanced type 2 diabetes also require insulin treatment when their bodies can no longer produce enough insulin or respond to it effectively.
An issue is that injected insulin can not replicate the actions of a healthy pancreas. Too little insulin results in hyperglycaemia, which is where blood glucose levels are dangerously high. Over time this can damage blood vessels, nerves, kidneys and eyesight. On the other hand, too much insulin can cause hypoglycaemia, which is where blood glucose falls too low. Symptoms include dizziness, confusion and, in severe cases, death.
Due to these risks, those using insulin must constantly make decisions about their dosage several times a day.
HOW DOES SMART INSULIN WORK?
Smart insulin responds directly to glucose levels in the body and aims to solve this problem. Rather than remaining continuously active after injection, it would only become triggered when blood sugar rises above a certain threshold.
Several approaches have been investigated by researchers. The most promising one involves attaching insulin molecules to glucose- sensitive compounds that act as biological sensors. These molecules are called glucosides, which have a similar shape to glucose. When blood sugar levels are low, the glucoside binds to the ring, keeping the insulin in an inactive state. Then, as blood glucose rises, the glucoside is replaced by the glucose itself, which triggers the insulin to shift its shape and become active, which helps bring blood sugar levels down. It is said that smart insulins such as this one “have the potential to be truly transformative in the management of type 1 diabetes”.
Potential benefits:
The potential advantages of smart insulin are endless and extend beyond convenience.
One of the main reasons is that it could reduce the risk of hypoglycaemia. Insulin activity would decrease as blood glucose levels fall and patients would be much less likely to experience threatening drops in blood sugar.
Secondly, the burden of diabetes management would be reduced. Instead of having to constantly monitor glucose levels and calculate doses, patients would only need occasional injections that automatically adapt to their body’s needs.
Long-term health benefits are also present. The complications and chances of cardiovascular disease are reduced as blood glucose levels stay within a healthy range, and also reduce change of kidney damage. Smart insulin improves glucose control and therefore may help prevent these conditions from developing.
Overall, not only does smart insulin have the ability to dramatically improve quality of life for a range of people, but it can also reduce the stress associated with living with diabetes.
Challenges and future goals:
However, despite the enormous potential, smart insulin is not available for clinical use at the moment. Scientists must go through many steps before technology can become a reality. The smart insulin must respond rapidly enough to rising glucose levels while remaining stable and inactive when glucose concentrations are normal, and a great deal of research is required to make this happen. Treatment must also be safe, reliable and effective over long periods of time.
Many real-world conditions will have to be applied to smart insulin, such as exercise, illness and diet, before smart insulin can be made available to the public. It is the aim to have the orally administered product in the market by 2030.
Nevertheless, progress is being made. Advances in biotechnology, molecular engineering and drug delivery systems have accelerated research in recent years, and many scientists believe glucose-responsive insulin could become one of the most important developments in diabetes treatment since insulin itself was first discovered.
Advances in biotechnology and drug delivery systems have accelerated research, and progress is definitely being made. Many scientists believe glucose-responsive insulin could become one of the most important developments in diabetes treatment since the discovery of insulin. It is the aim to have the orally administered product on the market by 2030.
In conclusion, smart insulin represents an exciting example of how biochemistry can be used to solve real-world medical problems. By combining our understanding of chemical pathways, proteins and molecular interactions, researchers can develop treatments that could mimic the body’s natural processes more closely than ever before. Even though there are significant challenges left to overcome, smart insulin can make diabetes safer and less stressful for the millions of people living with the condition worldwide.
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