Featured Research

from universities, journals, and other organizations

Stem cells boost heart's natural repair mechanisms

Date:
January 30, 2013
Source:
Cedars-Sinai Medical Center
Summary:
Researchers, whose clinical trial results in 2012 demonstrated that stem cell therapy reduces scarring and regenerates healthy tissue after a heart attack, now have found that the stem cell technique boosts production of existing adult heart cells (cardiomyocytes) and spurs recruitment of existing stem cells that mature into heart cells.

Injecting specialized cardiac stem cells into a patient's heart rebuilds healthy tissue after a heart attack, but where do the new cells come from and how are they transformed into functional muscle?

Related Articles


Researchers at the Cedars-Sinai Heart Institute, whose clinical trial results in 2012 demonstrated that stem cell therapy reduces scarring and regenerates healthy tissue after a heart attack, now have found that the stem cell technique boosts production of existing adult heart cells (cardiomyocytes) and spurs recruitment of existing stem cells that mature into heart cells. The findings, from a laboratory animal study, are published in EMBO Molecular Medicine online.

"We're finding that the effect of stem cell therapy is indirect. It stimulates proliferation of dormant surviving host heart tissue, and it attracts stem cells already in the heart. The resultant new heart muscle is functional and durable, but the transplanted stem cells themselves do not last long," said Eduardo Marbán, MD, PhD, director of the Heart Institute. Marbán, the article's senior author, invented the experimental stem cell procedures and technology tested in humans.

Consistent with previous studies, the researchers found that the heart's native stem cells are not responsible for the normal replenishment of lost heart cells, but they do contribute to rebuilding heart tissue after heart attack.

This study shows that existing heart cells contribute to formation of new heart cells in the normal heart: Through a gradual cycling process, dying heart cells are replaced by new ones. The researchers found that this cycling process escalates in response to heart attack, enabling existing heart cells to assist in the development of new ones. Further, these effects can be amplified through stem cell therapy.

The investigational therapy turns on genes that bolster cell production from both sources -- existing heart cells and existing stem cells -- essentially boosting the heart's normal means of cell replacement and its natural responses to injury. The injection of stem cells also improves heart structure and function.

Marbán and his clinical and research teams in 2009 performed the first procedure in which a heart attack patient's own heart tissue was used to grow specialized stem cells that were injected back into the heart. Earlier this year, they reported results of a clinical trial that found significant reduction in the size of heart attack-caused scars in patients who underwent the experimental stem cell procedure, compared to others who did not.

Although the preliminary results are positive, the researchers do not know precisely how the research treatment works.

"Understanding the cellular sources and mechanisms of heart regeneration is the first step toward refining our strategies to more effectively regenerate healthy tissue after heart attacks," said Marbán, the Mark S. Siegel Family Professor.

The animal study was supported by National Institutes of Health grant R01 HL083109, the California Institute for Regenerative Medicine and the Cedars-Sinai Board of Governors Heart Stem Cell Center.

The process to grow cardiac-derived stem cells involved in the clinical trial was developed earlier by Marbán when he was on the faculty of Johns Hopkins University. The university has filed for a patent on that intellectual property and has licensed it to Capricor Inc., a biotechnology company in which Dr. Marbán is a founder and equity holder. The company provided no funding for this study.


Story Source:

The above story is based on materials provided by Cedars-Sinai Medical Center. Note: Materials may be edited for content and length.


Journal Reference:

  1. Konstantinos Malliaras, Yiqiang Zhang, Jeffrey Seinfeld, Giselle Galang, Eleni Tseliou, Ke Cheng, Baiming Sun, Mohammad Aminzadeh, Eduardo Marbán. Cardiomyocyte proliferation and progenitor cell recruitment underlie therapeutic regeneration after myocardial infarction in the adult mouse heart. EMBO Molecular Medicine, 2013; DOI: 10.1002/emmm.201201737

Cite This Page:

Cedars-Sinai Medical Center. "Stem cells boost heart's natural repair mechanisms." ScienceDaily. ScienceDaily, 30 January 2013. <www.sciencedaily.com/releases/2013/01/130130101820.htm>.
Cedars-Sinai Medical Center. (2013, January 30). Stem cells boost heart's natural repair mechanisms. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2013/01/130130101820.htm
Cedars-Sinai Medical Center. "Stem cells boost heart's natural repair mechanisms." ScienceDaily. www.sciencedaily.com/releases/2013/01/130130101820.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Best Tips to Curb Holiday Carbs

The Best Tips to Curb Holiday Carbs

Buzz60 (Dec. 19, 2014) — It's hard to resist those delicious but fattening carbs we all crave during the winter months, but there are some ways to stay satisfied without consuming the extra calories. Vanessa Freeman (@VanessaFreeTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Sierra Leone Bikers Spread the Message to Fight Ebola

Sierra Leone Bikers Spread the Message to Fight Ebola

AFP (Dec. 19, 2014) — More than 100 motorcyclists hit the road to spread awareness messages about Ebola. Nearly 7,000 people have now died from the virus, almost all of them in west Africa, according to the World Health Organization. Video provided by AFP
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) — In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) — A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
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