With the aid of this imaging technology, they have now described aspects of how the pancreas develops during embryonic development and how the so-called islets of Langerhans are distributed in the adult organ. The findings are important for the interpretation of modeling systems for diabetes.
OPT images depicting two views of the embryonic stomach, intestine, and pancreas of a mouse. The newly developed algorithms presented in IEEE Transactions on Medical Imaging allow OPT imaging of biomedical preparations in great detail. The study was performed in collaboration with researchers at the Centre for Genomic Regulation in Barcelona, Spain, as well as the Department of Computer Science at Umeå University and Umeå Centre for Molecular Medicine (UCMM). The two images depict the same preparation; the image on the right is rotated 180 degrees. Photo and ©: Authors of the article.
New methods for the Optic Projection Tomography (OPT) imaging technology are presented by Umeå researchers in the prestigious journal for scientific imaging, IEEE Transactions on Medical Imaging. Using these methods, the researchers have also made new discoveries about the developmental biology and adult structure of the pancreas. These discoveries are being published in the journals PLoS ONE and Islets.OPT is a technique for three-dimensional visualization of gene and protein expression in tissue samples. The technology, which is broadly similar to medical computer tomography, uses ordinary light instead of x-rays and is being used more frequently in basic research fields such as developmental biology, plant biology and pathology. OPT, which was originally limited to analyses of small preparations, has previously been refined by the Umeå scientists to enable analysis of entire organs, such as the pancreas from various rodent model systems to understand diabetes.
Using the newly developed methods, the scientists present new findings about the developmental biology and structure of the pancreas. The pancreas contains the so-called islets of Langerhans, which produce the hormone insulin. Disrupted insulin production and/or in the ability of the body’s cells to respond to insulin signals can lead to diabetes.
In one of the studies, presented in the journal PLoS ONE, the researchers describe the developmental biological conditions for the formation of the so-called gastric lobe of the pancreas in the embryo. The development of this part of the pancreas has not been described in detail. However, the scientists in Umeå have found that this part of the pancreas is dependent on the normal development of the nearby spleen in order to form.
In yet another study, in the journal Islets, the researchers show that the insulin-producing islets are more numerous and considerably more unevenly distributed in the pancreas than was previously thought. For instance, the gastric lobe of the pancreas contains relatively more islets of Langerhans than the rest of the organ does.
Taken together, these studies offer information that is valuable to help evaluate how hereditary and environmental factors affect the number of insulin producing cells in various model systems for diabetes. The studies were made possible by grants from the Kempe Foundations, among others.
For more information, please contact Professor Ulf Ahlgren, Umeå Centre for Molecular Medicine (UCMM) at phone: +46 (0)90-785 44 34; mobile: +46 (0)70-220 92 28; e-mail Ulf.Ahlgren@ucmm.umu.se.
Bertil Born | idw
First transcription atlas of all wheat genes expands prospects for research and cultivation
17.08.2018 | Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung
Staying in Shape
16.08.2018 | Max-Planck-Institut für molekulare Zellbiologie und Genetik
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
17.08.2018 | Materials Sciences
17.08.2018 | Information Technology
17.08.2018 | Physics and Astronomy