Featured Research

from universities, journals, and other organizations

Priming 'cocktail' shows promise as cardiac stem cell grafting tool

Date:
December 5, 2013
Source:
University of Vermont
Summary:
Researchers have identified a new tool that could help facilitate future stem cell therapy for the more than 700,000 Americans who suffer a heart attack each year.

Jeffrey Spees, Ph.D., UVM associate professor of medicine and director, Stem Cell Core.
Credit: Raj Chawla, UVM Med Photo

New research by University of Vermont Associate Professor of Medicine Jeffrey Spees, Ph.D., and colleagues has identified a new tool that could help facilitate future stem cell therapy for the more than 700,000 Americans who suffer a heart attack each year. The study appeared online in Stem Cells Express.

Stem cells, which can come from embryos, fetal tissue and adult tissues, have the potential to develop into a variety of cell types in the body, such as muscle cells, brain cells and red blood cells. These cells also possess the ability to repair human tissues. The field of regenerative medicine -- which explores the viability of using embryonic, fetal and adult stem cells to repair and regenerate tissues and organs -- has struggled to successfully graft cells from culture back into injured tissue.

"Many grafts simply didn't take; the cells wouldn't stick or would die," explains Spees. So he and his research team set out to develop ways to enhance graft success.

They focused on a type of bone marrow-derived progenitor cell that forms stromal cells. Stromal cells form connective tissue and also support the creation of blood cells. The researchers were aware of that these cells secrete a diverse array of molecules -- called ligands -- that protect injured tissue, promote tissue repair and support stem and progenitor cells in culture. Different ligands interact with specific receptors on the surface of a stem or progenitor cell, transmitting signals that can instruct the cell to adhere, to divide, or to differentiate into a mature functional cell.

To confirm whether or not these types of ligands would protect a cardiac progenitor cell and help it graft, the group isolated a conditioned medium from human bone marrow-derived progenitor cells. They found that the medium contained Connective Tissue Growth Factor (CTGF) and the hormone insulin.

"Both CTGF and insulin are protective," says Spees. "Together, they have a synergistic effect."

In the study, Spees and colleagues compared the impact of sending a cardiac stem cell "naked" into a rodent heart with infarction (heart attack) to a cell that instead wore a "backpack" of protective ligands, created by incubating about 125,000 cardiac cells in a "cocktail" of CTGF and insulin on ice for 30 minutes. The team grafted the cells sub-epicardially -- between the outer layer and the muscle tissue of the heart -- and found that their priming cocktail resulted in improved graft success.

"We broke the record for engraftment!" exclaims Spees, who adds that the team's priming tool -named "Cell-Kro" -- dramatically increases cell adhesion, proliferation, survival, and migration.

While Spees and his colleagues continue to study grafting with cardiac stem cells from rats, the future could include human cardiac stem cells and human trials.

"There are about 650,000 bypass surgeries annually," says Spees. "These patients could have cells harvested at their first surgery and banked for future application. If they return for another procedure, they could then receive a graft of their own cardiac progenitor cells, primed in Cell-Kro, and potentially re-build part of their injured heart."


Story Source:

The above story is based on materials provided by University of Vermont. The original article was written by Jennifer Nachbur. Note: Materials may be edited for content and length.


Cite This Page:

University of Vermont. "Priming 'cocktail' shows promise as cardiac stem cell grafting tool." ScienceDaily. ScienceDaily, 5 December 2013. <www.sciencedaily.com/releases/2013/12/131205123453.htm>.
University of Vermont. (2013, December 5). Priming 'cocktail' shows promise as cardiac stem cell grafting tool. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2013/12/131205123453.htm
University of Vermont. "Priming 'cocktail' shows promise as cardiac stem cell grafting tool." ScienceDaily. www.sciencedaily.com/releases/2013/12/131205123453.htm (accessed September 2, 2014).

Share This




More Health & Medicine News

Tuesday, September 2, 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
Can You Train Your Brain To Eat Healthy?

Can You Train Your Brain To Eat Healthy?

Newsy (Sep. 1, 2014) New research says if you condition yourself to eat healthy foods, eventually you'll crave them instead of junk food. Video provided by Newsy
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

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