Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Transplanted bone marrow cells reduce liver fibrosis in mice

08.12.2004


Transplanted bone marrow cells can reduce carbon tetrachloride-induced liver fibrosis in mice and significantly improve their survival rates, according to a new study published in the December 2004 issue of Hepatology, the official journal of the American Association for the Study of Liver Diseases (AASLD). Published by John Wiley & Sons, Inc., Hepatology is available online via Wiley InterScience at http://www.interscience.wiley.com/journal/hepatology.



Previous reports have shown that bone marrow cells can differentiate into a number of other types of cells, including liver cells, which could help patients with liver cirrhosis and chronic liver failure. To study this possibility, researchers, led by Isao Sakaida, M.D. of Japan’s Yamaguchi University, studied the effect of transplanted bone marrow cells on mice with liver fibrosis.

The researchers first caused liver fibrosis in the mice by injecting them with carbon tetrachloride (CCI4) twice a week for four weeks. They then divided the mice into two groups and treated one with green fluorescent protein-positive blood marrow cells. They treated the control group with saline. All mice continued to be treated with carbon tetrachloride. After 1, 2, 3 or 4 weeks, the researchers assessed the extent of liver fibrosis in the mice. To measure survival rates, 15 mice from the experimental group and 15 from the control group were then treated with carbon tetrachloride for an additional 25 weeks.


After five weeks of treatment with carbon tetrachloride, the researchers detected liver fibrosis in the mice. Just one week after blood marrow cell transplantation, they found evidence of those cells in the liver, with more appearing as the weeks passed. "Surprisingly," the researchers report, "four weeks later, the blood marrow cell-transplanted liver clearly showed reduction of liver fibrosis compared with the liver treated with CCI4 alone at 8 weeks."

Furthermore, the mice that received blood marrow cell transplants along with continuing carbon tetrachloride treatments showed a gradually increased serum albumin level and had significantly improved survival rates compared with mice that only received carbon tetrachloride treatments.

The transplanted blood marrow cells degraded collagen fibers and reduced liver fibrosis, exhibiting strong expression of matrix metalloproteinases (MMPs), especially MMP-9. "The reason for the strong expression of MMP-9 is still unknown," report the authors, but report that it was somehow related to the migration of the blood marrow cells to the inflammatory liver and to those cells’ degradation of the liver fibrosis.

"The present study clearly indicates that this subpopulation of blood marrow cells is responsible for the resolution of liver fibrosis induced by CCI4 treatment," the authors conclude, and "introduces a new concept for the treatment of liver fibrosis."

David Greenberg | EurekAlert!
Further information:
http://www.interscience.wiley.com/journal/hepatology
http://www.wiley.com

More articles from Life Sciences:

nachricht The dense vessel network regulates formation of thrombocytes in the bone marrow
25.07.2017 | Rudolf-Virchow-Zentrum für Experimentelle Biomedizin der Universität Würzburg

nachricht Fungi that evolved to eat wood offer new biomass conversion tool
25.07.2017 | University of Massachusetts at Amherst

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Carbon Nanotubes Turn Electrical Current into Light-emitting Quasi-particles

Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers

Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...

Im Focus: Flexible proximity sensor creates smart surfaces

Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.

At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...

Im Focus: 3-D scanning with water

3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects

A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

NASA mission surfs through waves in space to understand space weather

25.07.2017 | Physics and Astronomy

Strength of tectonic plates may explain shape of the Tibetan Plateau, study finds

25.07.2017 | Earth Sciences

The dense vessel network regulates formation of thrombocytes in the bone marrow

25.07.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>