Featured Research

from universities, journals, and other organizations

Further Study Of Helicobacter Pylori Reducing Gastric Blood Flow

Date:
January 23, 2009
Source:
World Journal of Gastroenterology
Summary:
A research group from Sweden investigated the mechanisms underlying the reduction in gastric blood flow induced by a luminal water extract of Helicobacter pylori (H. pylori). They found that the H. pylori water extract reduces gastric mucosal blood flow acutely through iNOS- and nerve-mediated pathways.

Gastric mucosal blood flow has a vital role in gastric mucosal protection. A high blood flow is considered a good protection against injury, as it dilutes, neutralizes, and removes hazardous substances that have penetrated the gastric mucosal barrier. A research group in Sweden has previously found that a water extract of H. pylori reduces the mucosal blood flow in rats by a mast cell- and platelet activating factor (PAF)-dependent pathway.

Related Articles


In this study they further investigated the mechanisms behind the reduction in blood flow in mice. This will be published on January 14, 2009 in the World Journal of Gastroenterology.

In their study, the stomachs of isoflurane-anesthetized mice were exteriorized, and the mucosal surface exposed. Blood flow was measured with the laser-Doppler technique, and systemic arterial blood pressure monitored. C57BL/6 mice were exposed to water extract produced from H. pylori strain 88-23. To investigate the role of a nerveor iNOS-mediated pathway, they used intraluminal lidocaine and iNOS-/- mice. Blood flow response to the endogenous nitric oxide synthase inhibitor asymmetric dimethyl arginine (ADMA) was also assessed.

They found that in wild-type mice, the water extract of H. pylori decreased mucosal blood flow by approximately 30%. This reduction was abolished in iNOS-deficient mice, and by pre-treatment with lidocaine. Luminally applied ADMA resulted in reduction in blood flow similar to that observed in wild-type mice exposed to the water extract of H. pylori.

The results indicated that H. pylori water extract reduces gastric mucosal blood flow acutely through an iNOS- and nerve-mediated pathway. This will be very importance to understand the development of gastric inflammation.


Story Source:

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


Journal Reference:

  1. Henriksnδs J, Atuma C, Phillipson M, Sandler S, Engstrand L, Holm L. Acute effects of Helicobacter pylori extracts on gastric mucosal blood flow in the mouse. World Journal of Gastroenterology, 2009; 15 (2): 219 DOI: 10.3748/wjg.15.219

Cite This Page:

World Journal of Gastroenterology. "Further Study Of Helicobacter Pylori Reducing Gastric Blood Flow." ScienceDaily. ScienceDaily, 23 January 2009. <www.sciencedaily.com/releases/2009/01/090121093356.htm>.
World Journal of Gastroenterology. (2009, January 23). Further Study Of Helicobacter Pylori Reducing Gastric Blood Flow. ScienceDaily. Retrieved December 18, 2014 from www.sciencedaily.com/releases/2009/01/090121093356.htm
World Journal of Gastroenterology. "Further Study Of Helicobacter Pylori Reducing Gastric Blood Flow." ScienceDaily. www.sciencedaily.com/releases/2009/01/090121093356.htm (accessed December 18, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, December 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Kids Die While Under Protective Services

Kids Die While Under Protective Services

AP (Dec. 18, 2014) — As part of a six-month investigation of child maltreatment deaths, the AP found that hundreds of deaths from horrific abuse and neglect could have been prevented. AP's Haven Daley reports. (Dec. 18) Video provided by AP
Powered by NewsLook.com
UN: Up to One Million Facing Hunger in Ebola-Hit Countries

UN: Up to One Million Facing Hunger in Ebola-Hit Countries

AFP (Dec. 17, 2014) — Border closures, quarantines and crop losses in West African nations battling the Ebola virus could lead to as many as one million people going hungry, UN food agencies said on Wednesday. Duration: 00:52 Video provided by AFP
Powered by NewsLook.com
When You Lose Weight, This Is Where The Fat Goes

When You Lose Weight, This Is Where The Fat Goes

Newsy (Dec. 17, 2014) — Can fat disappear into thin air? New research finds that during weight loss, over 80 percent of a person's fat molecules escape through the lungs. Video provided by Newsy
Powered by NewsLook.com
Why Your Boss Should Let You Sleep In

Why Your Boss Should Let You Sleep In

Newsy (Dec. 17, 2014) — According to research out of the University of Pennsylvania, waking up for work is the biggest factor that causes Americans to lose sleep. Video provided by Newsy
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