Featured Research

from universities, journals, and other organizations

Adult Stem Cells From Bone Marrow Made To Kill Metastatic Lung Cancer Cells In Mice

Date:
May 22, 2009
Source:
American Thoracic Society
Summary:
Researchers have demonstrated the ability of adult stem cells from bone marrow (mesenchymal stem cells, or MSCs) to deliver a cancer-killing protein to tumors. The genetically engineered stem cells are able to home to the cancer cells, both in culture and in mouse models, and deliver TNF-related apoptosis-inducing ligand, destroying the tumor cells while sparing normal cells.

Researchers in London have demonstrated the ability of adult stem cells from bone marrow (mesenchymal stem cells, or MSCs) to deliver a cancer-killing protein to tumors.

The genetically engineered stem cells are able to home to the cancer cells, both in culture and in mouse models, and deliver TNF-related apoptosis-inducing ligand (TRAIL), destroying the tumor cells while sparing normal cells.

The research will be presented on May 19, at the American Thoracic Society's 105th International Conference in San Diego.

"Present oncological therapies are limited by host toxicity," said Michael Loebinger, M.D., M.A, who, along with S. M. Janes, M.D., Ph.D., conducted the research at the Centre for Respiratory Research at the University College of London. "They are also limited by cancer resistance and may not destroy cancer stem cells."

With these experiments, the investigators combined two disparate areas of research that they believed held promise for treating cancer. Studies had shown that MSCs can be used as vectors to deliver anti-tumor therapy, while other studies found that TRAIL killed cancer cells, but not normal cells.

For their experiments, Drs. Loebinger and Janes identified those cells likely to be resistant to therapies (cancer cells that have characteristics of stem cells) and found that they were just as likely to be destroyed as tumor cells by this novel therapy.

In culture, the stem cells caused lung, squamous, breast and cervical cancer cells to die (all p< 0.01), even at low stem cell/tumor cell ratios (1:16).

In mice, the researchers showed that the stem cells could reduce the growth of subcutaneous breast tumors by approximately 80 percent (p< .0001). The stem cells could also be injected intravenously as therapy for mice with lung metastases and could eliminate lung metastases in 38 percent of mice compared to control mice, all of which still had metastases (p=0.03).

It is the first study to intravenously introduce MSCs that have been genetically modified to deliver TRAIL. Drs. Loebinger and Janes chose the breast cancer cells for both models because in their in vitro experiments, the MSCs "demonstrated a particularly strong homing to breast cancer cells."

"Breast cancer tumors are a good model of metastases," added Dr. Loebinger, "but our plan is to test the engineered stem cells with other models, including lung cancer."

While not fully understood, Dr. Loebinger added, the homing of the engineered cells appears to be a characteristic of MSCs themselves.

The authors conclude that, "this is the first study to demonstrate a significant reduction in tumor burden with inducible TRAIL-expressing MSCs in a well-controlled and specifically directed therapy."

They believe that human trials of TRAIL-expressing MSCs could begin in two or three years.

Funding for this research was provided by the Medical Research Council UK.


Story Source:

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


Cite This Page:

American Thoracic Society. "Adult Stem Cells From Bone Marrow Made To Kill Metastatic Lung Cancer Cells In Mice." ScienceDaily. ScienceDaily, 22 May 2009. <www.sciencedaily.com/releases/2009/05/090519172051.htm>.
American Thoracic Society. (2009, May 22). Adult Stem Cells From Bone Marrow Made To Kill Metastatic Lung Cancer Cells In Mice. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2009/05/090519172051.htm
American Thoracic Society. "Adult Stem Cells From Bone Marrow Made To Kill Metastatic Lung Cancer Cells In Mice." ScienceDaily. www.sciencedaily.com/releases/2009/05/090519172051.htm (accessed July 28, 2014).

Share This




More Health & Medicine News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

$15B Deal on Vets' Health Care Reached

$15B Deal on Vets' Health Care Reached

AP (July 28, 2014) A bipartisan deal to improve veterans health care would authorize at least $15 billion in emergency spending to fix a veterans program scandalized by long patient wait times and falsified records. (July 28) Video provided by AP
Powered by NewsLook.com
Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com
West Africa Gripped by Deadly Ebola Outbreak

West Africa Gripped by Deadly Ebola Outbreak

AFP (July 28, 2014) The worst-ever outbreak of the deadly Ebola epidemic grips west Africa, killing hundreds. Duration: 00:48 Video provided by AFP
Powered by NewsLook.com
Trees Could Save More Than 850 Lives Each Year

Trees Could Save More Than 850 Lives Each Year

Newsy (July 27, 2014) A national study conducted by the USDA Forest Service found that trees collectively save more than 850 lives on an annual basis. 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