Featured Research

from universities, journals, and other organizations

New Strategy Improves Stem Cell Recruitment, Heart Function And Survival After Heart Injury

Date:
April 5, 2009
Source:
Cell Press
Summary:
A new study in mice shows that a dual therapy can lead to generation of new blood vessels and improved cardiac function following a heart attack. The research provides an explanation for the ineffectiveness of current stem-cell-mobilizing therapies and may drive design of future regenerative therapies for the heart.

A new study in mice shows that a dual therapy can lead to generation of new blood vessels and improved cardiac function following a heart attack. The research, published in the April 3rd issue of the journal Cell Stem Cell, provides an explanation for the ineffectiveness of current stem-cell-mobilizing therapies and may drive design of future regenerative therapies for the heart.

Stem-cell-based therapies are an attractive option for the treatment of heart damage after a heart attack, also known as myocardial infarction (MI). However, although animal studies using stem cells derived from the bone marrow have elicited some improvement in cardiac function, human trials have not been as successful. "Modern approaches have to focus on the process of cardiac homing to improve the clinical outcome of stem cell therapies," explains senior study author, Dr. Wolfgang-Michael Franz from Ludwig-Maximilians University.

The stromal-cell-derived factor, type I (SDF-1) is the main chemical that guides stem cells to home in on damaged heart tissue. Because SDF-1 is inactivated by CD26/dipeptidylpeptidase IV (DPP-IV), endogenous stem cell localization to the heart is not optimal. The researchers used genetic or pharmacologic inhibitors of CD26/DPP-IV to slow degradation of SDF-1 in mice with surgically induced MI. They also treated the mice with granulocyte colony stimulating factor (GCSF), a commonly used drug that mobilizes multiple stem cell populations from the bone marrow to the blood.

The researchers found that genetic or pharmacologic inhibition of CD26/DPP-IV combined with G-CSF treatment decreased DPP-IV and stabilized activated SDF-1 in the heart, thereby enhancing the recruitment of circulating blood forming precursor cells, or EPCs (endothelial progenitors) to this organ. Further, the combined treatment increased formation of new blood vessels and improved both survival and cardiac function after MI.

The results represent the first experimental evidence that inhibition of DPP-IV combined with G-CSF enhances cardiovascular regeneration. "Our findings may contribute essential new aspects for design of future stem cell trials, since the key issue of all therapeutic stem cell approaches emerges to be the process of cardiac homing," says Dr. Franz. "We propose the use of combined DPP-IV inhibition and G-CSF application as a new therapeutic concept for future stem cell trials."

The reseachers include Marc-Michael Zaruba, Hans Diogenes Theiss, Markus Vallaster, Ursula Mehl, Stefan Brunner, Robert David, Rebekka Fischer, Lisa Krieg, Eva Hirsch, Bruno Huber, Petra Nathan, Lars Israel, Axel Imhof, Nadja Herbach, Gerald Assmann, Ruediger Wanke, Josef Mueller-Hoecker, Gerhard Steinbeck, and Wolfgang-Michael Franz, of Ludwig-Maximilians-University, Munich, Germany.


Story Source:

The above story is based on materials provided by Cell Press. Note: Materials may be edited for content and length.


Cite This Page:

Cell Press. "New Strategy Improves Stem Cell Recruitment, Heart Function And Survival After Heart Injury." ScienceDaily. ScienceDaily, 5 April 2009. <www.sciencedaily.com/releases/2009/04/090402124242.htm>.
Cell Press. (2009, April 5). New Strategy Improves Stem Cell Recruitment, Heart Function And Survival After Heart Injury. ScienceDaily. Retrieved April 17, 2014 from www.sciencedaily.com/releases/2009/04/090402124242.htm
Cell Press. "New Strategy Improves Stem Cell Recruitment, Heart Function And Survival After Heart Injury." ScienceDaily. www.sciencedaily.com/releases/2009/04/090402124242.htm (accessed April 17, 2014).

Share This



More Health & Medicine News

Thursday, April 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Obama: 8 Million Healthcare Signups

Obama: 8 Million Healthcare Signups

AP (Apr. 17, 2014) President Barack Obama gave a briefing Thursday announcing 8 million people have signed up under the Affordable Care Act. He blasted continued Republican efforts to repeal the law. (April 17) Video provided by AP
Powered by NewsLook.com
Is Apathy A Sign Of A Shrinking Brain?

Is Apathy A Sign Of A Shrinking Brain?

Newsy (Apr. 17, 2014) A recent study links apathetic feelings to a smaller brain. Researchers say the results indicate a need for apathy screening for at-risk seniors. Video provided by Newsy
Powered by NewsLook.com
Could Even Casual Marijuana Use Alter Your Brain?

Could Even Casual Marijuana Use Alter Your Brain?

Newsy (Apr. 16, 2014) A new study conducted by researchers at Northwestern and Harvard suggests even casual marijuana use can alter your brain. Video provided by Newsy
Powered by NewsLook.com
Thousands Of Vials Of SARS Virus Go Missing

Thousands Of Vials Of SARS Virus Go Missing

Newsy (Apr. 16, 2014) A research institute in Paris somehow misplaced more than 2,000 vials of the deadly SARS virus. 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:
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