Navigation Links
Researchers Detect Blood-Clotting Mechanism
Date:6/4/2009

Finding could help those with potentially deadly conditions

THURSDAY, June 4 (HealthDay News) -- Ever wonder how your blood miraculously stops flowing and forms a scab after a cut? Researchers have now pinpointed the mechanism down to the molecular level.

"The human body has an incredible ability to heal from life's scrapes and bruises," study co-author Wesley P. Wong, a principal investigator at the Rowland Institute at Harvard University, said in a university news release.

"A central aspect of this response to damage is the ability to bring bleeding to an end, a process known as hemostasis," Wong said. "Yet regulating hemostasis is a complex balancing act."

If people have too much hemostatic activity, they can develop an excess of blood clots, resulting in thrombosis, which is a potentially deadly condition. On the other hand, if there is too little hemostatic activity, people could bleed to death, according to background information in the news release.

To achieve and maintain the right hemostatic balance, the body has a feedback system controlled by miniscule forces in the circulation system. The forces are applied to the highly-sensitive A2 domain of the blood-clotting protein called von Willebrand factor (VWF), which acts as a "force sensor," the researchers explained.

By manipulating single molecules, the researchers found that the tiniest force causes A2 molecules to unfold and lose much of their complex, three-dimensional organization. After the unfolding, the enzyme ADAMTS13 comes into play. The enzyme cuts the molecule, hence controlling the size of the blood clot, according to the study, in the June 5 issue of Science.

"In the body, these cutting events decrease hemostatic potential and also enable blood clots to be trimmed in size," Wong said. "The system is so finely tuned that the A2 shear sensor is able to regulate the size of VWF within the bloodstream, maintaining the optimal size for responding properly to traumas."

To manipulate molecules, the researchers used "optical tweezers" developed in Wong's lab, which can apply miniscule forces to individual molecules while observing tiny changes in their length.

A better understanding of the mechanism of blot clotting could lead to new treatments for injuries or bleeding disorders, such as type 2A von Willebrand disease, the researchers noted.

More information

The American Academy of Family Physicians has more on excessive blood clotting.



-- Jennifer Thomas



SOURCE: Harvard University, news release, June 4, 2009


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Stanford researchers find culprit in aging muscles that heal poorly
2. UCLA researchers identify markers that may predict diabetes in still-healthy people
3. Mayo Clinic researchers discover new diagnostic test for detecting infection in prosthetic joints
4. Bipolar disorder relapses halved by Melbourne researchers
5. Cell that triggers symptoms in allergy attacks can also limit damage, Stanford researchers find
6. High and mighty: first common height gene identified by researchers behind obesity gene finding
7. Researchers estimate about 9 percent of US children age 8 to 15 meet criteria for having ADHD
8. Majority of 2.4 Million U.S. Children With ADHD Not Diagnosed or Consistently Treated, According to New Gold Standard Study by Cincinnati Childrens Researchers
9. Researchers develop long-lasting growth hormone
10. Jefferson immunology researchers halt lethal rabies infection in brain
11. Purdue researchers develop technology to detect cancer by scanning surface veins
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers Detect Blood-Clotting Mechanism
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced traumatic events may suffer ... unhealthy avenues, such as drug or alcohol abuse, as a coping mechanism. To avoid ... healthy coping following a traumatic event. , Trauma sufferers tend to feel a range ...
(Date:6/24/2016)... ... ... Marcy was in a crisis. Her son James, eight, was out of control. Prone to ... , “When something upset him, he couldn’t control his emotions,” remembers Marcy. “If there ... my other children and say he was going to kill them. If we were ...
(Date:6/24/2016)... ... 24, 2016 , ... Global law firm Greenberg Traurig, P.A. announced that 20 ... by their peers for this recognition are considered among the top 2 percent of ... honors as members of this year’s Legal Elite Hall of Fame: Miami Shareholders ...
(Date:6/24/2016)... ... June 24, 2016 , ... Comfort Keepers® of San Diego, CA is excited ... To Recovery® program to drive cancer patients to and from their cancer treatments. ... highest quality of life and ongoing independence. Getting to and from medical treatments ...
(Date:6/24/2016)... ... June 24, 2016 , ... People across the U.S. ... magazine’s Code Talker Award, an essay contest in which patients and their families pay ... be presented at the 2016 National Society of Genetic Counselors (NSGC) Annual Education Conference ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... June 24, 2016 Research ... "Structural Electronics 2015-2025: Applications, Technologies, Forecasts" ... In-Mold Electronics, Smart Skin, Structural Health ... Structural electronics involves electronic and/or electrical ... structures, replacing dumb structures such as vehicle bodies ...
(Date:6/24/2016)... June 24, 2016 Dehaier Medical Systems Ltd. ... which develops, markets and sells medical devices and wearable ... signed a strategic cooperation agreement with Hongyuan Supply Chain ... Chain") on June 20, 2016, to develop Dehaier,s new ... cooperation agreement, Dehaier will leverage Hongyuan Supply Chain,s sales ...
(Date:6/24/2016)... , June 24, 2016 Research ... World Market for Companion Diagnostic Tests" report to their ... Market for Companion Diagnostics The World Market ... and personalized medicine diagnostics. Market analysis in the report includes ... Test Market (In Vitro Diagnostic Kits) by Region (N. America, ...
Breaking Medicine Technology: