Corporate Banner
Satellite Banner
Technology
Networks
Scientific Communities
 
Become a Member | Sign in
Home>News>This Article
  News
Return

Endocannabinoids Trigger Inflammation That Leads to Diabetes

Published: Thursday, August 22, 2013
Last Updated: Thursday, August 22, 2013
Bookmark and Share
NIH scientists identify possible treatment target for type 2 diabetes.

Researchers at the National Institutes of Health have clarified in rodent and test tube experiments the role that inflammation plays in type 2 diabetes, and revealed a possible molecular target for treating the disease.

The researchers say some natural messenger chemicals in the body are involved in an inflammatory chain that can kill cells in the pancreas, which produces insulin.

A report of the finding appears online in Nature Medicine.

"This study is a significant milestone in an ongoing exploration of the endocannabinoid system's role in the metabolic complications of obesity," says Kenneth R. Warren, Ph.D., acting director of NIH's National Institute on Alcohol Abuse and Alcoholism (NIAAA), which led the study.

Endocannabinoids are natural messengers in the body that help regulate many biological functions. They are chemically similar to the active compound in marijuana.

Recent studies have tied endocannabinoids to the metabolic problems that lead to diabetes. Researchers also have recognized that inflammation appears to play an important role in the pathology of diabetes.

"The identities of the molecular and cellular actors in the inflammatory processes that underlie type 2 diabetes have remained elusive," explains senior author and NIAAA scientific director George Kunos, M.D., Ph.D. "Our study connects endocannabinoids to an inflammatory cascade leading to the loss of beta cells in the pancreas, which is a hallmark of type 2 diabetes."

Working with a strain of genetically obese rats that serve as a model for human type 2 diabetes, Dr. Kunos and his colleagues used a combination of pharmacological and genetic tools to show that endocannabinoids trigger receptors on macrophages in the pancreas.

Macrophages are immune system cells, present in all tissues that rid the body of cellular debris and pathogens.

"Like various other peripheral tissues, such as the liver, skeletal muscles, pancreas, and fatty tissue, macrophages have receptors for endocannabinoids," explains Dr. Kunos.

The researchers demonstrated that endocannabinoid activation of macrophages in the pancreas leads to activation of a protein complex within macrophages called the Nlrp3 inflammasome.

The inflammasome, in turn, releases molecules that cause the death of pancreatic beta cells and the progression of type 2 diabetes in the rats.

"When we treated the rats with compounds that deplete macrophages or block all peripheral cannabinoid receptors, inflammasome activation and type 2 diabetes progression was slowed," noted Dr. Kunos.

In test tube experiments, the researchers showed that macrophages from humans and mice produced the same inflammasome response when they were incubated with endocannabinoids.

However, mouse macrophages that were genetically altered to lack cannabinoid receptors or inflammasomes generated no such response.

Most notably, the researchers showed that by selectively blocking the expression of cannabinoid receptors on macrophages, they could protect and restore beta cell function in the genetically obese rats, which delayed the development and reduced the severity of their diabetes.

The authors conclude that the findings point to a key role in type 2 diabetes for endocannabinoid-induced inflammasome activation in macrophages, and identify cannabinoid receptors on macrophages as a new therapeutic target.

"To understand type 2 diabetes, a public health threat that affects young and old alike, we need to consider all the factors at play," said Monica Skarulis, M.D., staff clinician at National Institute of Diabetes and Digestive and Kidney Diseases and co-author. "We hope that what we've learned from this research will help us develop new strategies to prevent and treat the condition."

In addition to Dr. Kunos' team of NIAAA scientists and Dr. Skarulis, co-authors on the study included researchers from the University of Colorado Medical Campus, Aurora, and the University of Massachusetts Medical School, Worcester.


Further Information

Join For Free

Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 3,000+ scientific posters on ePosters
  • More Than 4,500+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Ketamine Metabolism Lifts Depression
NIH-funded team finds rapid-acting, non-addicting agent in mouse study.
Thursday, May 05, 2016
Finding Factors That Protect Against Flu
A clinical trial examining the body’s response to seasonal flu suggests new approaches for evaluating the effectiveness of seasonal flu vaccines.
Wednesday, April 27, 2016
Factors Influencing Influenza Vaccine Effectiveness Uncovered
The long-held approach to predicting seasonal influenza vaccine effectiveness may need to be revisited, new research suggests.
Thursday, April 21, 2016
Study Finds Factors That May Influence Influenza Vaccine Effectiveness
Researchers at NIH have suggested that the long-held approach to predicting seasonal influenza vaccine effectiveness may need to be revisited.
Wednesday, April 20, 2016
Serotonin Transporter Structure Revealed
Researchers determined the 3-D structure of the serotonin transporter and visualized how two common antidepressants interact with the protein.
Wednesday, April 20, 2016
Improving Flu Vaccine Effectiveness
NIH study finds factors that may influence influenza vaccine effectiveness.
Wednesday, April 20, 2016
Submissions Open for the Cancer Moonshot Program
NCI opens online platform to submit ideas about research for Cancer Moonshot.
Tuesday, April 19, 2016
Migration Creates Cancer Cell Vulnerabilities
Scientists found that migration can damage cancer cells’ nuclei and DNA, requiring repairs for their survival. The results may open new avenues for targeting metastatic cancer.
Wednesday, April 13, 2016
NIH Sequences Genome of a Fungus
Researchers at the Institute have sequenced genome of human, mouse and rat Pneumocystis that cause life-threatening Pneumonia in immunosuppressed hosts.
Tuesday, April 12, 2016
NIH Awards Grants to Explore Vaccine Adjuvants
NIH awards six grants to explore how combination adjuvants improve vaccines.
Wednesday, April 06, 2016
Children With Cushing Syndrome May Have Higher Suicide Risk
Researchers at NIH have found that depression, anxiety and suicidal thoughts increase after treatment.
Wednesday, March 30, 2016
Experimental Vaccine Protects Against Dengue Virus
An experimental dengue vaccine protected all the volunteers who received it from infection with a live dengue virus.
Wednesday, March 30, 2016
Couples’ Pre-Pregnancy Caffeine Consumption Linked to Miscarriage Risk
Researchers at NIH have found daily multivitamin before and after conception greatly reduces miscarriage risk.
Friday, March 25, 2016
Study Finds Mindfulness Meditation Offers Relief For Low-Back Pain
Researchers at NIH have found that the MBSR and CBT may prove more effective than usual treatment in alleviating chronic low-back pain.
Wednesday, March 23, 2016
3-D Technology Enriches Human Nerve Cells For Transplant to Brain
This platform is expected to make transplantation of neurons a viable treatment for a broad range of human neurodegenerative disorders.
Friday, March 18, 2016
Scientific News
AACR 2016: Cancer Immunotherapy and Beyond
At this year's meeting there was a palpable buzz around subjects ranging from microbiomics to the tumor microenvironment and cancer vaccines, big data to in vitro and in vivo modeling and drug delivery (to name just a few).
How Skeletal Stem Cells Form The Blueprint Of The Face
USC researchers discover that two types of molecular signals work to control where and when stem cells turn into facial cartilage.
Intestinal Worms Boost Immune System In A Surprising Way
EPFL researchers find that intestinal worm infections cause lymph nodes to produce more immune cells as well as grow in size.
Measuring The Airborne Toxicants Urban Bicyclists Inhale
Researchers analyze breath biomarkers to measure uptake of volatile organic compounds by bicyclists.
Breast Milk Hormones Impact Bacteria In Infants’ Guts
Intestinal microbiome of children born to obese mothers significantly different from those born to mothers of healthy weight, CU Anschutz researchers find.
Newborn Screening Test Developed For Rare, Deadly Neurological Disorder
Scientists have developed a new dried blood spot screening test for Niemann-Pick type C, with goal to speed diagnosis and treatment.
'Kidney on a Chip' Facilitates Safer Drug Dosing
University of Michigan researchers have used a "kidney on a chip" device to mimic the flow of medication through human kidneys and measure its effect on kidney cells.
New Autism Blood Biomarker Identified
Researchers at UT Southwestern Medical Center have identified a blood biomarker that may aid in earlier diagnosis of children with autism spectrum disorder, or ASD.
New Method Allows First Look At Embryo Implantation
Researchers at The Rockefeller University develop a method that shows the molecular and cellular processes that occur up to day 14 after fertilization.
Shining A Light On Bladder Cancer
Researchers scrutinize patterns of mutations in bladder tumor genomes, gleaning insights into the roles of DNA repair and tobacco-related DNA damage.
Scroll Up
Scroll Down
Skyscraper Banner

Skyscraper Banner
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
3,000+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,500+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!