Featured Research

from universities, journals, and other organizations

Research findings breathe new life into lung disease

Date:
October 24, 2012
Source:
St. Michael's Hospital
Summary:
New research shows that while muscle cells are responsible for constricting or dilating the blood vessels, they are not responsible for sensing the amount of oxygen that gets to the lungs.

It turns out the muscle cells on the outside of blood vessels have been wrongly accused for instigating lung disease. New research shows that while these muscle cells are responsible for constricting or dilating the blood vessels, they are not responsible for sensing the amount of oxygen that gets to the lungs. That message comes from the endothelial cells -- special cells that line the blood vessels -- along a "signalling pathway."

When a person is low on oxygen, blood vessels throughout the body expand to improve the delivery of this vital molecule to the tissues. The one exception is that when oxygen is low in the lungs, blood vessels there constrict. When this condition persists, it causes pulmonary hypertension -- a lung disorder where the arteries that carry blood from the heart to the lungs become smaller -- and makes it difficult for the heart to pump blood through the lungs. This leads to enlargement of the right heart, called right heart failure.

Dr. Wolfgang Kuebler, a Li Ka Shing Knowledge Institute scientist at St. Michael's Hospital, has found that the endothelial cells play a much larger role in the constriction of blood vessels in response to the lack of oxygen and in subsequent pulmonary hypertension, than previously believed. The findings of his study, which was conducted on mice, have been published online in the Journal of Clinical Investigation.

"The vascular endothelial cells have always been regarded as a bystander, but we've discovered that lung disease in response to low oxygen originates at this level, that the message is sent by these cells," said Dr. Kuebler. He said that if there were a way to block, or inhibit, this communication along the signalling pathway between the endothelial cells and the smooth muscle cells, we could potentially prevent right heart failure, a fairly common disease among patients with lung disease.


Story Source:

The above story is based on materials provided by St. Michael's Hospital. The original article was written by Evelyne Jhung. Note: Materials may be edited for content and length.


Journal Reference:

  1. Liming Wang, Jun Yin, Hannah T. Nickles, Hannes Ranke, Arata Tabuchi, Julia Hoffmann, Christoph Tabeling, Eduardo Barbosa-Sicard, Marc Chanson, Brenda R. Kwak, Hee-Sup Shin, Songwei Wu, Brant E. Isakson, Martin Witzenrath, Cor de Wit, Ingrid Fleming, Hermann Kuppe, Wolfgang M. Kuebler. Hypoxic pulmonary vasoconstriction requires connexin 40–mediated endothelial signal conduction. Journal of Clinical Investigation, 2012; DOI: 10.1172/JCI59176

Cite This Page:

St. Michael's Hospital. "Research findings breathe new life into lung disease." ScienceDaily. ScienceDaily, 24 October 2012. <www.sciencedaily.com/releases/2012/10/121024141626.htm>.
St. Michael's Hospital. (2012, October 24). Research findings breathe new life into lung disease. ScienceDaily. Retrieved September 1, 2014 from www.sciencedaily.com/releases/2012/10/121024141626.htm
St. Michael's Hospital. "Research findings breathe new life into lung disease." ScienceDaily. www.sciencedaily.com/releases/2012/10/121024141626.htm (accessed September 1, 2014).

Share This




More Health & Medicine News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Get on Your Bike! London Cycling Popularity Soars Despite Danger

Get on Your Bike! London Cycling Popularity Soars Despite Danger

AFP (Sep. 1, 2014) Wedged between buses, lorries and cars, cycling in London isn't for the faint hearted. Nevertheless the number of people choosing to bike in the British capital has doubled over the past 15 years. Duration: 02:27 Video provided by AFP
Powered by NewsLook.com
We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Liberia Continues Fight Against Ebola

Liberia Continues Fight Against Ebola

AFP (Aug. 30, 2014) Authorities in Liberia try to stem the spread of the Ebola epidemic by raising awareness and setting up sanitation units for people to wash their hands. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
California Passes 'yes-Means-Yes' Campus Sexual Assault Bill

California Passes 'yes-Means-Yes' Campus Sexual Assault Bill

Reuters - US Online Video (Aug. 30, 2014) California lawmakers pass a bill requiring universities to adopt "affirmative consent" language in their definitions of consensual sex, part of a nationwide drive to curb sexual assault on campuses. Linda So reports. Video provided by Reuters
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:
from the past week

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