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Groundbreaking new study could change the way we detect, predict, and manage diabetes

Last updated: July 29, 2025 1:54 pm
Oliver James
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9 Min Read
Groundbreaking new study could change the way we detect, predict, and manage diabetes
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Scientists have uncovered a remarkable shift in how we understand insulin resistance and type 2 diabetes. Researchers from the University of Copenhagen revealed that everyone has their own unique response to insulin, challenging how the condition has traditionally been diagnosed and treated.

Contents
Rethinking a Global Health CrisisRelated StoriesStudying Muscle at the Molecular LevelBuilding the Future of Personalized Diabetes CareTaking a Closer Look at the ScienceThe Road Ahead

This research takes a deep dive into the molecular makeup of muscle tissue and shows that insulin sensitivity isn’t as black and white as once believed. Instead, it’s more like a spectrum—with distinct molecular fingerprints that could change the way we detect, predict, and manage diabetes.

Rethinking a Global Health Crisis

More than 500 million people live with type 2 diabetes around the world, according to the IDF Diabetes Atlas. The condition is often diagnosed by elevated blood sugar levels or poor responses to insulin. But now, thanks to new technology, scientists are realizing that the disease is far more complex.

The proteome and phosphoproteome of human skeletal muscle are critical determinants of whole-body insulin sensitivity (CREDIT: Cell)The proteome and phosphoproteome of human skeletal muscle are critical determinants of whole-body insulin sensitivity (CREDIT: Cell)
The proteome and phosphoproteome of human skeletal muscle are critical determinants of whole-body insulin sensitivity (CREDIT: Cell)

Researchers from Denmark, Sweden, and beyond worked together to examine the underlying differences in how people respond to insulin. Instead of just separating people into “healthy” or “diabetic,” they found that individuals show a wide range of insulin sensitivity—even among those with similar diagnoses.

“We found huge variation in insulin sensitivity, even among people considered healthy and among those diagnosed with type 2 diabetes,” said Associate Professor Atul Deshmukh from the Novo Nordisk Foundation Center for Basic Metabolic Research at the University of Copenhagen. “There are even some individuals living with type 2 diabetes who respond better to insulin than healthy individuals.”

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This means that your body’s insulin response is much more personal than we thought. And this variation could explain why some people develop complications while others do not—even if they share the same diagnosis.

Studying Muscle at the Molecular Level

To reach these findings, the researchers looked closely at muscle tissue, a key site for insulin activity. Using a technology called mass spectrometry-based proteomics, they studied over 120 people. This allowed them to examine thousands of proteins and phosphorylation sites in skeletal muscle.

They focused on two groups: one with type 2 diabetes and another with normal glucose levels. Each group underwent detailed testing, including the hyperinsulinemic-euglycemic clamp—the gold standard method for measuring insulin sensitivity.

The team found striking results. Some people with type 2 diabetes showed better insulin sensitivity than those considered healthy. This was true even after accounting for factors like fasting glucose and HbA1c, common blood sugar markers.

Proteomic signature of insulin-sensitive and -resistant skeletal muscle (CREDIT: Cell)Proteomic signature of insulin-sensitive and -resistant skeletal muscle (CREDIT: Cell)
Proteomic signature of insulin-sensitive and -resistant skeletal muscle (CREDIT: Cell)

Instead of finding clear-cut differences, the study revealed a 36-fold range in insulin sensitivity. In simple terms, no two bodies responded to insulin the same way. Even within the diabetic group, the range was massive.

To make sense of this, researchers analyzed protein and phosphoprotein levels in muscle tissue. They discovered that the molecular landscape of skeletal muscle plays a huge role in how your body handles insulin. Certain proteins consistently matched higher or lower insulin sensitivity. These changes could act as early warning signs long before symptoms arise.

Building the Future of Personalized Diabetes Care

Anna Krook, a professor at Karolinska Institutet in Sweden and co-lead author, believes these results lay the groundwork for personalized treatment. “By learning more about the molecular signatures of insulin resistance, we’re building the foundation for precision medicine in type 2 diabetes tailored to each patient.”

These so-called “molecular fingerprints” of insulin resistance not only predict how your body reacts to insulin, but they also help doctors understand which treatments might work best for you.

The fasting phosphoproteome landscape is a critical determinant of IS (CREDIT: Cell)The fasting phosphoproteome landscape is a critical determinant of IS (CREDIT: Cell)
The fasting phosphoproteome landscape is a critical determinant of IS (CREDIT: Cell)

Jeppe Kjærgaard Northcote, another researcher on the team, explained, “When we combine this deep clinical data with the molecular signatures of insulin resistance, we suddenly understand a lot more about people’s insulin resistance that we can use to design precision medicine.”

The data showed that one protein, BDH1, had a strong positive link to insulin sensitivity. Another protein, HSPA2, showed the opposite. These patterns remained steady across both men and women, even though male and female metabolism can differ in many ways.

Taking a Closer Look at the Science

To perform this study, researchers developed a high-throughput method to prepare tissue samples. Using advanced technology, they ran nearly 500 tests to examine protein levels in muscle. They found more than 29,000 phosphorylation sites across 3,000 proteins—an impressive level of detail.

The results showed that insulin resistance is not just about how much insulin you produce or how much glucose you absorb. It’s about the specific proteins in your muscle cells and how they behave. These proteins are shaped by both your genetics and your environment.

Preserved and dysregulated insulin signaling across states of insulin resistance (CREDIT: Cell)Preserved and dysregulated insulin signaling across states of insulin resistance (CREDIT: Cell)
Preserved and dysregulated insulin signaling across states of insulin resistance (CREDIT: Cell)

Interestingly, the researchers found that these protein patterns were better at predicting insulin sensitivity than traditional blood tests like fasting glucose or HbA1c. Even in a fasting state, the proteomic data strongly reflected how a person would respond to insulin.

These findings suggest that the standard clinical tests might miss early signs of insulin resistance. In contrast, muscle proteins could reveal what’s going on under the surface much sooner.

Another powerful part of this study was the use of machine learning. By feeding the protein data into a Random Forest model, the team could accurately predict insulin resistance. The model was even more precise than simply grouping people by whether or not they had diabetes.

Principal component analysis further showed that insulin resistance follows a spectrum. People don’t fall into just two categories. Instead, they scatter along a wide range of sensitivity, and this variation shows up clearly in the molecular data.

The sex-specific molecular signature reveals shared and distinct features of metabolism (CREDIT: Cell)The sex-specific molecular signature reveals shared and distinct features of metabolism (CREDIT: Cell)
The sex-specific molecular signature reveals shared and distinct features of metabolism (CREDIT: Cell)

The Road Ahead

The scientists hope this research will inspire a shift in how doctors approach type 2 diabetes. Instead of waiting for blood sugar levels to rise or symptoms to appear, doctors might one day use molecular signatures to detect insulin resistance early on.

This could lead to better treatment strategies. People could receive therapies based on their own biology, rather than a one-size-fits-all approach.

While the research is still in its early stages, it already shows great promise. By using detailed protein data, we can better understand how the body responds to insulin. More importantly, this understanding can lead to earlier diagnosis and more effective treatment for millions around the world.

With this kind of insight, the path toward personalized care in diabetes becomes clearer. And with more studies like this, the future of healthcare looks not only more advanced but more human.

Research findings are available online in the journal Cell00515-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS009286742500515X%3Fshowall%3Dtrue#fig1).

Note: The article above provided above by The Brighter Side of News.

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