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| PhD student Joakim Lehrstrand (foreground) and Professor Ulf Ahlgren at a so‑called light sheet fluorescence microscopy, one of the techniques they use to create three-dimensional images of the pancreas in diabetes. Photo Credit: Björn Morén |
Scientific Frontline: Extended "At a Glance" Summary: Whole-Organ 3D Imaging in Type 1 Diabetes
The Core Concept: Advanced whole-organ 3D imaging is a microscopic mapping technique used to visualize the complete cellular landscape of human organs, recently revealing that significant populations of insulin-producing β-cells survive long after the onset of type 1 diabetes.
Key Distinction/Mechanism: While traditional methodologies focus strictly on the islets of Langerhans—often underestimating surviving β-cells—this comprehensive 3D mapping technique identifies hundreds of thousands of previously overlooked insulin-producing cells dispersed as individual cells or small clusters completely outside the islet structures.
Major Frameworks/Components:
- Light Sheet Fluorescence Microscopy: The advanced imaging technology utilized to construct high-resolution, three-dimensional spatial maps of the entire organ without sectioning artifacts.
- Extra-Islet Cellular Reservoirs: Dispersed populations of β-cells located outside traditional islet structures that demonstrate potential resistance to immune destruction.
- Microenvironment Analysis: The spatial isolation and study of specific intra-organ regions to understand the molecular conditions that promote β-cell survival or regeneration.
Branch of Science: Endocrinology, Cellular Biology, and Translational Medicine.
Future Application: The spatial mapping technique will serve as a foundational tool for researching type 1 diabetes, type 2 diabetes, and pancreatic cancer, ultimately guiding novel targeted therapies aimed at stabilizing or expanding surviving β-cell reservoirs.
Why It Matters: This research fundamentally challenges the conventional assumption that insulin-producing cells are entirely eradicated in type 1 diabetes, exposing an overlooked cellular reservoir that could eventually become a primary target for restorative medical interventions rather than symptom management alone.
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| Three‑dimensional images of entire human pancreases in which the islets of Langerhans are stained for insulin (red). Despite the marked difference between the pancreas from the non‑diabetic and the type 1 diabetic donor, the latter still contained hundreds of thousands of insulin‑producing cells. Image Credit: Ulf Ahlgren |
Researchers at Umeå University have conducted a unique three-dimensional mapping of an entire human pancreas. The study shows that insulin-producing cells can remain long after the onset of type 1 diabetes—a finding that suggests the disease progression is more complex than previously assumed.
"Our results suggest the pancreas can retain β cells—those insulin-producing cells that are typically destroyed in type 1 diabetes—in a way that has not previously been recognized," says Ulf Ahlgren, professor at the Department of Medical and Translational Biology at Umeå University.
Using advanced imaging technologies, researchers at Umeå University have created the first complete 3D map of an entire pancreas from a donor with late-onset type 1 diabetes at a microscopic resolution. The analysis revealed that while traditional islets of Langerhans were largely depleted of β cells, a substantial number of insulin-producing cells still remained outside the islet structures. These were primarily found as individual cells or as small clusters of β cells distanced from all other endocrine cell types. In total, the researchers identified hundreds of thousands of insulin-positive objects.
"The fact that these cells are located outside the islets and are more numerous than the islet-associated β cells—that is, in inverse proportions compared to nondiabetic subjects—suggests that they may either be more resistant to destruction or that new β cells can be formed," says Ahlgren.
The researchers argue that traditional islet-focused analyses risk underestimating how many β cells actually survive in type 1 diabetes. The new findings point to a previously overlooked cellular reservoir that could, in the long term, become a target for novel therapeutic strategies.
The video shows a region from a late onset – type 1 diabetes donor, stained for insulin (red) and glucagon (green), showing examples of b-cells residing outside traditional islet structures.
Video Credit: Courtesy of Umeå University
"The ability to study individual cells throughout an entire organ and from all angles has the potential to change how we think about β-cell loss," explains Ahlgren. "If certain regions of the pancreas promote β-cell survival, understanding these microenvironments could help guide the development of therapies that stabilize, or even expand, the remaining β cells in type 1 diabetes."
Doctoral student Joakim Lehrstrand also emphasizes the importance of broadening the perspective.
"This work shows that we must look beyond the islets when studying β-cell biology in type 1 diabetes," he says.
The research group believes that whole-organ 3D imaging will become a key tool in future studies of type 1 diabetes and other pancreas-related diseases, such as type 2 diabetes and pancreatic cancer. The method makes it possible to identify specific regions or even individual cells throughout the entire organ—something that has previously been extremely difficult using conventional techniques. These regions can then be isolated for further molecular analyses.
"Hopefully, this will help us understand whether and how β cells and their microenvironment differ within the pancreas in diabetes," says Ahlgren.
Published in journal: Science Advances
Authors: Joakim Lehrstrand, Max Hahn, Björn Morén, Wayne I. L. Davies, Olle Korsgren, Tomas Alanentalo, and Ulf Ahlgren
Source/Credit: Umeå University | Ingrid Söderbergh
Edited by: Scientific Frontline
Reference Number: cbio052526_01
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