Navigation Links
Growth factor in stem cells may spur recovery from MS
Date:5/21/2012

A substance in human mesenchymal stem cells that promotes growth appears to spur restoration of nerves and their function in rodent models of multiple sclerosis (MS), researchers at Case Western Reserve University School of Medicine have found.

Their study is embargoed until published in the online version of Nature Neuroscience at 1 p.m. U.S. Eastern Standard Time on Sunday, May 20.

In animals injected with hepatocyte growth factor, inflammation declined and neural cells grew. Perhaps most important, the myelin sheath, which protects nerves and their ability to gather and send information, regrew, covering lesions caused by the disease.

"The importance of this work is we think we've identified the driver of the recovery," said Robert H. Miller, professor of neurosciences at the School of Medicine and vice president for research at Case Western Reserve University.

Miller, neurosciences instructor Lianhua Bai and biology professor Arnold I. Caplan, designed the study. They worked with Project Manager Anne DeChant, and research assistants Jordan Hecker, Janet Kranso and Anita Zaremba, from the School of Medicine; and Donald P. Lennon, a research assistant from the university's Skeletal Research Center.

In MS, the immune system attacks myelin, risking injury to exposed nerves' intricate wiring. When damaged, nerve signals can be interrupted, causing loss of balance and coordination, cognitive ability and other functions. Over time, intermittent losses may become permanent.

Miller and Caplan reported in 2009 that when they injected human mesenchymal stem cells into rodent models of MS, the animals recovered from the damage wrought by the disease. Based on their work, a clinical trial is underway in which MS patients are injected with their own stem cells.

In this study, the researchers first wanted to test whether the presence of stem cells or something cells produce promotes recovery. They injected mice with the medium in which mesenchymal stem cells, culled from bone marrow, grew.

All 11 animals, which have a version of MS, showed a rapid reduction in functional deficits.

Analysis showed that the disease remained on course unless the molecules injected were of a certain size; that is, the molecular weight ranged between 50 and 100 kiloDaltons.

Research by others and results of their own work indicated hepatocyte growth factor, which is secreted by mesenchymal stem cells, was a likely instigator.

The scientists injected animals with 50 or 100 nanograms of the growth factor every other day for five days. The level of signaling molecules that promote inflammation decreased while the level of signaling molecules that counter inflammation increased. Neural cells grew and nerves laid bare by MS were rewrapped with myelin. The 100-nanogram injections appeared to provide slightly better recovery.

To test the system further, researchers tied up cell-surface receptors, in this case cMet receptors that are known to work with the growth factor.

When they jammed the receptors with a function-blocking cMet antibody, neither the mesenchymal stem cell medium nor the hepatocyte growth factor injections had any effect on the disease. In another test, injections of an anti-hepatocyte growth factor also blocked recovery.

The researchers will continue their studies, to determine if they can screen mesenchymal stem cells for those that produce the higher amounts of hepatocyte growth factor needed for effective treatment. That could lead to a more precise cell therapy.

"Could we now take away the mesenchymal stem cells and treat only with hepatocyte growth factor?" Miller asked. "We've shown we can do that in an animal but it's not clear if we can do that in a patient."

They also plan to test whether other factors may be used to stimulate the cMet receptors and induce recovery.


'/>"/>
Contact: Jessica Studeny
jessica.studeny@case.edu
216-368-4692
Case Western Reserve University
Source:Eurekalert

Related biology news :

1. Plant growth without light control
2. Updates in Interventional Radiology accents emerging trends, practice growth
3. Researchers find reducing fishmeal hinders growth of farmed fish
4. Polluting China for the sake of economic growth
5. Fruit flies provide new knowledge about uninhibited cell growth
6. Research shows how PCBs promote dendrite growth, may increase autism risk
7. Global Surgical Devices Market Growth Driven by Improving Standards of Living and Longer Life Expectancies, Research Shows
8. New Biotech and Pharmaceutical Market Research from Global Information Inc Forecasts Strong Growth Coming Out of Recession
9. Salk scientists open new window into how cancers override cellular growth controls
10. The effect of catch-up growth by various diets and resveratrol intervention on bone status
11. Embryonic development protein active in cancer growth
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/31/2016)... -- Genomics firm Nabsys has completed a financial  restructuring under ... M.D., who returned to the company in October 2015. ... including Chief Technology Officer, John Oliver , Ph.D., ... Vice President of Software and Informatics, Michael Kaiser ... Bready served as CEO of Nabsys from 2005-2014 and ...
(Date:3/22/2016)... India , March 22, 2016 /PRNewswire/ ... market research report "Electronic Sensors Market for Consumer ... Proximity, & Others), Application (Communication & IT, ... Geography - Global Forecast to 2022", published ... industry is expected to reach USD 26.76 ...
(Date:3/18/2016)... 18, 2016 --> ... ICT, Manned & Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance ... in the border security market and the continuing migration crisis ... Europe has led visiongain to publish this ... --> defence & security companies in the ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... Andrew D Zelenetz ... Published recently in Oncology ... touchONCOLOGY, Andrew D Zelenetz , discusses the ... is placing an increasing burden on healthcare systems ... With the patents on many biologics expiring, interest ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the ... Convention Center and will showcase its product’s latest features from June 26 to ... a scientific poster on Disrupting Clinical Trials in The Cloud during the conference. ...
(Date:6/23/2016)... ... June 23, 2016 , ... Velocity Products, a division of ... and optimized exclusively for Okuma CNC machining centers at The International Manufacturing Technology ... among several companies with expertise in toolholding, cutting tools, machining dynamics and distribution, ...
(Date:6/23/2016)... 23, 2016 ReportsnReports.com adds ... to its pharmaceuticals section with historic and forecast ... much more. Complete report on the ... profiling 15 companies and supported with 261 tables ... . The Global Cell Culture ...
Breaking Biology Technology: