Navigation Links
UT Southwestern researchers uncover culprits in life-threatening clotting disorder
Date:12/3/2010

DALLAS Dec. 3, 2010 Thanks to findings by UT Southwestern Medical Center researchers, individuals with a potentially life-threatening condition predisposing them to blood clots, or thrombosis, might someday receive therapy to prevent the condition.

The findings, available online and in a future issue of The Journal of Clinical Investigation, offer new clues into the mechanisms underlying antiphospholipid syndrome (APS).

"Patients with APS have circulating antibodies that cause exaggerated thrombosis. The longstanding mystery has been how these antibodies initiate the clotting," said Dr. Philip Shaul, professor of pediatrics and senior co-author of the study.

For the study, the researchers first examined the direct actions of APS antibodies on cultured endothelial cells, which line the inside of blood vessels.

They discovered that the thrombosis-inducing antibodies recognize a protein called Beta2-Glycoprotein I on the endothelial cell surface that then interacts with a second protein, apolipoprotein E receptor 2 (apoER2). ApoER2 ultimately inactivates the enzyme that produces the antithrombotic molecule nitric oxide. The decrease in nitric oxide causes both white blood cells and platelets to bind to the endothelium, initiating the thrombosis.

Dr. Shaul said the findings are quite promising because they identify the series of molecular events responsible for the exaggerated thrombosis.

The study also found that in contrast to normal mice, mice genetically engineered to lack apoER2 are completely protected from developing thrombosis when they are given APS antibodies collected from individuals with the syndrome.

"Patients with thrombosis often require lifelong anti-coagulation therapy," he said. "The problem with this approach is that the anti-coagulation can be ineffective, and there are multiple potential serious complications related to bleeding. It makes much more sense to develop new therapies that target the underlying disease mechanism."

Dr. Chieko Mineo, assistant professor of pediatrics and senior co-author of the study, said the findings are particularly important for pregnant women with APS because they are at high risk of miscarriage and preterm birth.

"Even if a woman with APS does carry to term, the infant is often smaller than normal and can suffer from multiple complications," Dr. Mineo said. "Our ongoing studies indicate that the mechanisms we have identified that provoke thrombosis are also operative in APS during pregnancy to adversely affect the health of both the mother and the fetus."

The next step, Dr. Shaul said, is to test in the mouse models three novel therapeutic interventions that are based on the new understanding of APS.

"If they prevent thrombosis or pregnancy complications in the mouse models, clinical trials would of course follow," Dr. Shaul said.


'/>"/>

Contact: Kristen Holland Shear
kristen.hollandshear@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert  

Related biology news :

1. Waste from gut bacteria helps host control weight, UT Southwestern researchers report
2. RSV may hide in the lungs, lead to asthma, UT Southwestern researchers report
3. UT Southwestern researcher awarded Gates Foundation grant for novel vaccine development
4. Deranged calcium signaling contributes to neurological disorder, UT Southwestern researchers find
5. UT Southwestern researchers identify gene linked to inherited form of fatal lung disease
6. UT Southwestern scientist honored among best in Texas research
7. Natural brain substance blocks weight gain in mice, UT Southwestern researchers discover
8. UT Southwestern researchers disrupt biochemical system involved in cancer, degenerative disease
9. UT Southwestern researchers identify molecule that helps the sleep-deprived to mentally rebound
10. Two UT Southwestern researchers awarded Sloan fellowships
11. Diabetics on high-fiber diets might need extra calcium, report UT Southwestern researchers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
UT Southwestern researchers uncover culprits in life-threatening clotting disorder
(Date:4/5/2017)... Today HYPR Corp. , leading innovator ... of the HYPR platform is officially FIDO® Certified ... architecture that empowers biometric authentication across Fortune 500 enterprises ... over 15 million users across the financial services industry, ... product suites and physical access represent a growing portion ...
(Date:4/4/2017)... NEW YORK , April 4, 2017   ... solutions, today announced that the United States Patent and ... The patent broadly covers the linking of an iris ... the same transaction) and represents the company,s 45 th ... our latest patent is very timely given the multi-modal ...
(Date:3/30/2017)... -- On April 6-7, 2017, Sequencing.com will host the world,s ... at Microsoft,s headquarters in Redmond, Washington ... health and wellness apps that provide a unique, personalized ... is the first hackathon for personal genomics and the ... the genomics, tech and health industries are sending teams ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... first-ever genomics analysis platform specifically designed for life science researchers to analyze ... pioneering researcher Rosalind Franklin, who made a major contribution to the discovery ...
(Date:10/11/2017)... Md. (PRWEB) , ... October 11, 2017 , ... ... digital pathology, announced today it will be hosting a Webinar titled, “Pathology is ... Advanced Pathology Associates , on digital pathology adoption best practices and how Proscia ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology today announced ... to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) B ... to cross the cell membrane and bind intracellular STAT3 and inhibit its function. ...
(Date:10/10/2017)... firm Parks Associates announced today that Tom Kerber , ... Meeting , October 11 in Scottsdale, Arizona . Kerber ... smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase Driver ... "The residential security market has experienced continued growth, and the introduction ...
Breaking Biology Technology: