Featured Research

from universities, journals, and other organizations

Insight Into Physiologic Role Of Blood Protein Factor XII Finally Revealed

Date:
August 24, 2008
Source:
Journal of Clinical Investigation
Summary:
The formation of a blood clot is the culmination of a series of events that involve a number of proteins in the bloodstream, including Factor XI, which is one of the proteins activated early on in this cascade of events.

The formation of a blood clot is the culmination of a series of events that involve a number of proteins in the bloodstream, including Factor XI, which is one of the proteins activated early on in this cascade of events.

Surprisingly, Factor XI is activated in different ways in the body and in a glass test tube. In a glass test tube, Factor XI is activated by a protein known as Factor XII, which is itself activated when it comes into contact with the glass. However, Factor XII plays no role in Factor XI activation in the body and its physiologic function and mechanism of activation have not been determined.

New data, generated by Martijn Gebbink and colleagues, at the University Medical Center Utrecht, The Netherlands, have identified the aggregates of misfolded proteins present in the blood of individuals with systemic amyloidosis (a disease in which misfolded blood proteins are abnormally deposited in organs and/or tissues, causing disease) as activators of Factor XII.

Interestingly, activation of Factor XII by isolated misfolded proteins and misfolded proteins in the blood of individuals with systemic amyloidosis did not trigger the cascade of events that lead to blood clot formation. Rather, it triggered another series of events known as the kallikrein-kinin system, which influences the inflammatory response. In an accompanying commentary, Alvin Schmaier, at Case Western Reserve University, Cleveland, discusses these results in the context of previously published data.


Story Source:

The above story is based on materials provided by Journal of Clinical Investigation. Note: Materials may be edited for content and length.


Journal Reference:

  1. Maas et al. Misfolded proteins activate Factor XII in humans, leading to kallikrein formation without initiating coagulation. Journal of Clinical Investigation, 2008; DOI: 10.1172/JCI35424

Cite This Page:

Journal of Clinical Investigation. "Insight Into Physiologic Role Of Blood Protein Factor XII Finally Revealed." ScienceDaily. ScienceDaily, 24 August 2008. <www.sciencedaily.com/releases/2008/08/080821194711.htm>.
Journal of Clinical Investigation. (2008, August 24). Insight Into Physiologic Role Of Blood Protein Factor XII Finally Revealed. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2008/08/080821194711.htm
Journal of Clinical Investigation. "Insight Into Physiologic Role Of Blood Protein Factor XII Finally Revealed." ScienceDaily. www.sciencedaily.com/releases/2008/08/080821194711.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Microneedle Patch Promises Painless Pricks

Microneedle Patch Promises Painless Pricks

Reuters - Innovations Video Online (Oct. 18, 2014) Researchers at The National University of Singapore have invented a new microneedle patch that could offer a faster and less painful delivery of drugs such as insulin and painkillers. Video provided by Reuters
Powered by NewsLook.com
Raw: Nurse Nina Pham Arrives in Maryland

Raw: Nurse Nina Pham Arrives in Maryland

AP (Oct. 17, 2014) The first nurse to be diagnosed with Ebola at a Dallas hospital walked down the stairs of an executive jet into an ambulance at an airport in Frederick, Maryland, on Thursday. Pham will be treated at the National Institutes of Health. (Oct. 16) Video provided by AP
Powered by NewsLook.com
Raw: Cruise Ship Returns to US Over Ebola Fears

Raw: Cruise Ship Returns to US Over Ebola Fears

AP (Oct. 17, 2014) A Caribbean cruise ship carrying a Dallas health care worker who is being monitored for signs of the Ebola virus is heading back to Texas, US, after being refused permission to dock in Cozumel, Mexico. (Oct. 17) Video provided by AP
Powered by NewsLook.com
Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

AFP (Oct. 17, 2014) All four suspected Ebola cases admitted to hospitals in Spain on Thursday have tested negative for the deadly virus in a first round of tests, the government said Friday. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins