HOME >> BIOLOGY >> NEWS
A switch that makes a blood clot sticky found within the platelet membrane

(Philadelphia, PA) - Integrin receptors allow cells to attach to other cells and to connective tissue which is necessary to form tissues, organs, or even people, for that matter. Researchers at the University of Pennsylvania School of Medicine have demonstrated that a key to activating αIIbβ3, the integrin that allows platelets to form blood clots, can be found in the part of the molecule embedded within a platelet's outer membrane.

The αIIbβ3 integrin, also known as the platelet fibrinogen receptor or GP IIb-IIIa, has been the focus of an entire class of blood-thinning drugs, called GPIIb-IIIa agonists. The Penn researchers findings, published in this week's issue of Science, have implications for drugs created to thin the blood and, perhaps more broadly, offer an intriguing hint as to how integrins on cells throughout the body may function.

"The part of the GPIIb-IIIa molecule that is embedded in the fatty layers that constitute the platelet's outer membrane can determine whether or not the integrin is activated, thereby making the platelet 'sticky,'" said Joel S. Bennett, MD, Professor in Penn's Division of Hematology/Oncology within the Department of Medicine. "The transmembrane region, which was generally assumed to be just an anchor for keeping the integrin receptor in place, can be an activating switch for the entire molecule."

Once activated, the two subunits of GPIIb-IIIa that extend outside the cell can clasp the walls of a damaged blood vessel or a passing fibrinogen molecule V much like a bobby pin can close around strands of hair V thereby forming a normal blood clot or a pathologic thrombus. GPIIb-IIIa agonist drugs, such as ReoPro, Integrilin, and Aggrastat, work by preventing activated GPIIb-IIIa from binding to other objects in the bloodstream.

Since it is a protein, GPIIb-IIIa is made up of amino acids, strung along in a specific sequence to give the protein its shape. Bennett and his colleagues were able
'"/>

Contact: Greg Lester
lesterg@uphs.upenn.edu
215-349-5658
University of Pennsylvania School of Medicine
1-May-2003


Page: 1 2

Related biology news :

1. Researchers find color sensitive atomic switch in bacteria
2. Rice finds on-off switch for buckyball toxicity
3. Plant-like enzyme acts as key life cycle switch in malaria parasite
4. Shared gene switch for all plants found
5. EMBL researchers discover key molecular switch in eye development of medaka fish
6. Genetic master switch sends bacteria toward seafood dinner
7. Scientists switch components in cell circuits: Possible new technology, therapy
8. Crabs switch skeleton types
9. The mechanical switch in the ear
10. The structure behind the switch
11. Oxygen key switch in transforming adult stem cells from fat into cartilage

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: switch that makes blood clot sticky found within the platelet membrane

(Date:3/5/2015)... 5, 2015 In Brazil , ... already using these solutions and 42 percent planning to invest ... approximately 25 percent of the companies will be investing in ... majority of companies in the region are currently opting for ... model will command significant attention in the coming years. This ...
(Date:3/2/2015)... March 2, 2015 Synaptics Inc. (NASDAQ: ... human interface solutions, today announced a new implementation ... to enable rapid and secure transactions and reliable ... gaming is a turnkey solution providing mouse and ... quickly integrate fingerprint ID solutions into their product ...
(Date:2/25/2015)... , Feb. 25, 2015  ABC Financial Services ... in the Health and Fitness Industry, today announced ... to MYiCLUBonline.  The latest upgrade includes advances to ... of cardless check-in via Identity One fingerprint biometrics. ... time through interactive displays at the International Health, ...
Breaking Biology News(10 mins):Two of Every Three Brazilian Companies will have Invested in Cloud by 2015, Finds Frost & Sullivan 2Two of Every Three Brazilian Companies will have Invested in Cloud by 2015, Finds Frost & Sullivan 3Two of Every Three Brazilian Companies will have Invested in Cloud by 2015, Finds Frost & Sullivan 4Synaptics Unveils New Fingerprint ID Solution for Gamers 2Synaptics Unveils New Fingerprint ID Solution for Gamers 3ABC Financial Unveils New Software Enhancements 2ABC Financial Unveils New Software Enhancements 3
(Date:3/26/2015)...  BioNano Genomics, Inc., the leader in genome mapping, ... chief commercial officer. Salyer has more than 20 years ... life sciences. At BioNano, Salyer will oversee the commercialization ... to assemble a comprehensive view of complex genomes to ... institutions located in the United States ...
(Date:3/26/2015)... "In America," the popular news television program that airs in ... legendary film actor James Earl Jones, has announced that it ... , Botany is commonly described as the scientific study ... bit more complicated than that. Scientists and other professionals study ... the smallest bacteria known to man to the largest trees ...
(Date:3/25/2015)... , March 25, 2015 /PRNewswire/ - SQI Diagnostics Inc. ... that, as a result of recent discussions with certain ... shares of the Company, after dealing with certain matters ... special meeting of shareholders on March 26, 2015 (the ... the election of directors will take place when the ...
(Date:3/25/2015)... March 25, 2015 Accelovance, a therapeutically focused ... for "Best Contract Research Organization" at the upcoming Vaccine ... Congress. This is the eighth consecutive ... the award, winning for "Best Contract Research Organization" in ... distinction in 2013. "We,re excited to be ...
Breaking Biology Technology:BioNano Genomics Appoints Terry Salyer as Chief Commercial Officer 2BioNano Genomics Appoints Terry Salyer as Chief Commercial Officer 3SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 2SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 3SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 4SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 5Accelovance Nominated for 2015 Vaccine Industry Excellence (ViE) Awards 2
Cached News: