Researchers have identified a protein that may contribute to insulin resistance in people with type 2 diabetes, offering a new direction for future treatment research. The findings suggest that Miro1, a protein involved in the functioning of mitochondria—the structures that produce energy inside cells—may interfere with how muscles respond to insulin.
How Miro1 May Affect Blood Sugar Control
Insulin helps move glucose from the bloodstream into cells, where it can be used for energy. In people with insulin resistance, muscle cells respond less effectively to insulin, making blood sugar regulation more difficult.
The research team found elevated levels of Miro1 in the skeletal muscles of people with type 2 diabetes. In laboratory and preclinical experiments, removing the protein restored muscle responsiveness to insulin, suggesting that Miro1 could play a role in the development of insulin resistance.
Exercise May Help Reduce Miro1 Levels
The researchers also examined the effects of exercise in people with obesity and type 2 diabetes. Participants who took part in aerobic exercise showed lower Miro1 levels in their muscles, alongside improvements in insulin sensitivity and the muscles’ ability to produce energy.
These results offer a possible explanation for some of the benefits of physical activity in managing type 2 diabetes. However, the findings do not mean that exercise replaces prescribed treatment or that changing Miro1 levels alone can cure the condition.
What This Discovery Could Mean for Future Treatment
The study identifies Miro1 as a potential target for developing future diabetes therapies. Researchers will need to conduct further studies to determine whether treatments that target this protein can safely improve insulin sensitivity in people.
For now, the findings add to scientific understanding of how muscle cells contribute to type 2 diabetes and why physical activity can be an important part of its management.
