Navigation Links
Addex scientists discover GLP-1 induced interaction between GLP-1 and GIP receptors
Date:11/28/2011

Geneva, Switzerland, 28 November 2011 Addex Pharmaceuticals (SIX:ADXN), a leading biopharmaceutical company pioneering allosteric modulation-based drug discovery and development, announced today that its scientists have demonstrated that, in the presence of GLP-1, glucagon-like-peptide-1 receptor (GLP1R) can form a heterodimer receptor complex with gastric-inhibitory-peptide-receptor (GIPR). The discovery of this novel interaction between the two G-protein-coupled receptors (GPCR) has the potential to trigger the discovery of novel therapies for the treatment of diabetes. The findings were published online in the peer-reviewed journal Molecular Pharmacology (Lateral Allosterism in the Glucagon Receptor Family: GLP-1 Induces GPCR Heteromer Formation [Schelshorn et al., Molecular Pharmacology, Published online, doi: 10.1124/mol.111.074757]).

"GIPR and GLP1R are found together in pancreatic and nerve cells, and their roles in Type 2 diabetes make them important targets for drug development. Further research is needed to determine the pharmacological relevance of such heteromers but understanding their role may open the door to more refined therapies, particularly in metabolic disorders," explained Robert Lutjens, head of biology at Addex Pharmaceuticals and co-author of the publication. "This study demonstrates that Addex' allosteric modulation platform is a powerful tool for elucidating fundamental biological processes in addition to being the most sensitive method available for identifying allosteric modulators."

In the present study, the researchers at Addex used Bioluminescence Resonance Energy Transfer (BRET) techniques, calcium flux measurements, and microscopy to study receptor interactions within the glucagon receptor family of GPCRs. Through these techniques, a GLP-1-induced heteromer formation was exclusively observed in cells co-expressing GLP-1 with GIP receptors, but not with other receptors of the glucagon receptor subtypes. Furthermore, the pharmacology of this GLP-1-induced heteromeric receptor complex was found to be affected in presence of GIP. In addition, the heteromer's intracellular signaling through beta-arrestin or calcium second messenger was shown to be modified when compared to receptor homodimers, suggesting a form of allosteric regulation between the receptors.

"This research demonstrates how our pioneering allostery platform technology is able to observe specific interactions at the receptor level that have not been seen with conventional state-of-the-art techniques," noted Laurent Galibert, head of metabolic disease programs at Addex Pharmaceuticals. "An orally available small molecule targeting GLP1R would have a significant impact on the treatment of Type 2 diabetes. We now have the opportunity to explore and characterize this receptor further, paving the way for a better understanding of the signaling pathways implicated in diabetes and metabolism, which may offer novel therapeutic targets for allosteric modulation."

GLP-1 is an important metabolic hormone and a proven therapeutic ligand for treatment of diseases, such as Type II diabetes and obesity. Addex is leading the effort towards the development of orally available small molecule GLP1R activators, called positive allosteric modulators or PAM, which have potential to offer multiple advantages over marketed injectable peptide therapeutics targeting GLP1R.

Addex has previously disclosed that it achieved the first in vivo preclinical proof of concept demonstrating that an oral small molecule GLP1R PAM could increase the release of insulin and improve glucose control in preclinical diabetes models. Addex GLP1R PAMs are in lead generation phase for Type 2 diabetes and could become the first-in-class orally available small molecule therapeutic agents against this target.


'/>"/>

Contact: Mike Sinclair
msinclair@halsin.com
44-207-318-2955
Halsin Partners
Source:Eurekalert

Related biology news :

1. Hopkins scientists turn on fountain of youth in yeast
2. Scripps Research scientists uncover new role for gene in maintaining steady weight
3. Caltech scientists point to link between missing synapse protein and abnormal behaviors
4. Smithsonian scientists use fossil feathers reveal lineage of extinct, flightless ibis
5. UGA discovery changes how scientists think about plant cell wall formation
6. Iowa State University scientists genetically increase algae biomass by more than 50 percent
7. UGA scientists invent long-lasting, near infrared-emitting material
8. Scripps research scientists develop brand new class of small molecules through innovative chemistry
9. Scientists identify treatable weakness in lethal form of prostate cancer
10. Scientists tackle the carbon conundrum
11. GigaBlitz event seeks citizen scientists to capture images of nearby biodiversity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/30/2017)... ANGELES , March 30, 2017  On April ... Hack the Genome hackathon at Microsoft,s ... exciting two-day competition will focus on developing health and ... Hack the Genome is the ... been tremendous. The world,s largest companies in the genomics, ...
(Date:3/29/2017)... -- higi, the health IT company that operates the largest ... , today announced a Series B investment from BlueCross ... new investment and acquisition accelerates higi,s strategy to create ... health activities through the collection and workflow integration of ... and secures data today on behalf of over 36 ...
(Date:3/24/2017)... The Controller General of Immigration from Maldives Mr. ... have received the prestigious international IAIR Award for the most innovative ... ... Maldives Immigration ... Algeen (small picture on the right) have received the IAIR award for ...
Breaking Biology News(10 mins):
(Date:10/9/2017)... ... October 09, 2017 , ... ... 2017, in the medical journal, Epilepsia, Brain Sentinel’s SPEAC® System which uses ... EEG, in detecting generalized tonic-clonic seizures (GTCS) using surface electromyography (sEMG). The ...
(Date:10/7/2017)... ... October 06, 2017 , ... Phase ... metagenome deconvolution product, featuring the first commercially available Hi-C kit. Researchers can ... Hi-C metagenome deconvolution using their own facilities, supplementing the company’s full-service ProxiMeta ...
(Date:10/6/2017)... Boston, Mass. (PRWEB) , ... October 06, 2017 ... ... spotlight female entrepreneurship within the healthcare and technology sector at their fourth annual ... six panels featuring 30 inspiring speakers and the ELEVATE pitch competition showcasing early ...
(Date:10/5/2017)... ... October 05, 2017 , ... LabRoots , the leading provider of ... world, is giving back to cancer research with a month-long promotion supporting the advancement ... October 31, shoppers can use promo code PinkRibbon to get 10 percent off their ...
Breaking Biology Technology: