Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Study establishes safety of spinal cord stem cell transplantation

20.07.2006
Research confirms ability of stem cells to repair acute spinal cord damage without causing further injury

Transplanting human embryonic stem cells does not cause harm and can be used as a therapeutic strategy for the treatment of acute spinal cord injury, according to a recent study by UC Irvine researchers.

UCI neurobiologist Hans Keirstead and colleagues at the Reeve-Irvine Research Center found that rats with either mild or severe spinal cord injuries that were transplanted with a treatment derived from human embryonic stem cells suffered no visible injury or ill effects as a result of the treatment itself. Furthermore, the study confirmed previous findings by Keirstead’s lab – since replicated by four other laboratories around the world – that replacing a cell type lost after injury improves the outcome after spinal cord injury in rodents. The findings are published in the current issue of Regenerative Medicine.

“Establishing the safety of implanted embryonic stem cells is crucial before we can move forward with testing these treatments in clinical trials,” said Keirstead, an associate professor of anatomy and neurobiology and co-director of UCI’s Stem Cell Research Center. “We must always remember that a human clinical trial is an experiment and, going into it, we need to assure ourselves as best as we can that the treatment will not cause harm. This study is an important step in that direction.”

In 2005, Keirstead’s lab was the first to coax human embryonic stem cells to become highly pure specialized cells known as oligodendrocytes. These cells are the building blocks of myelin, which acts as insulation for nerve fibers and is critical for maintenance of electrical conduction in the central nervous system. When myelin is stripped away through disease or injury, paralysis can occur.

In this study, as in the original one, when the rats suffering from severe spinal cord injury were injected with the oligodendrocytes seven days after injury, the cells migrated to the appropriate sites within the spinal cord and wrapped around the damaged neurons, forming new myelin tissue.

By contrast, the rats who were only mildly impaired showed no increase or decrease in myelin generation, and no change in their walking ability after transplantation. According to Keirstead, the injury was so minor that no loss of myelin occurred. Therefore, a treatment based on remyelination would have no effect and the animals recovered motor function on their own. More importantly, while the treatment did not help with functional recovery, it also did not impair it. Upon further examination, the scientists found no damage to the tissues surrounding the spinal cord indicating that the transplantation had not caused any damage to the animals.

“Our biggest safety concern was that in the case of a severe injury, any harm the stem cell-derived treatment could cause would be masked by the injury itself,” Keirstead said. “In this study, we can see in animals that are only slightly injured that the transplantation does not cause visible harm and the injury is not hiding any damage the cells may have caused to the spinal cord or the surrounding tissue.”

Keirstead is working with Geron Corp. to bring this treatment for acute spinal cord injury into Phase I clinical trials within the next year.

Frank Cloutier, Monica Siegenthaler and Gabriel Nistor collaborated on the study, which was supported by Geron Corp.; a UC Discovery Grant; the Roman Reed Spinal Cord Injury Research Fund of California; Research for Cure; and individual donations to the Reeve-Irvine Research Center.

UCI is a premier center for stem cell research in California. The university announced last week that it had received a $10 million gift from Bill and Sue Gross in support of stem cell research, including matching funds to construct an $80 million Stem Cell Research Center facility.

About the University of California, Irvine: The University of California, Irvine is a top-ranked university dedicated to research, scholarship and community service. Founded in 1965, UCI is among the fastest-growing University of California campuses, with more than 24,000 undergraduate and graduate students and about 1,400 faculty members. The second-largest employer in dynamic Orange County, UCI contributes an annual economic impact of $3.3 billion. For more UCI news, visit www.today.uci.edu.

Television: UCI has a broadcast studio available for live or taped interviews. For more information, visit www.today.uci.edu/broadcast.

News Radio: UCI maintains on campus an ISDN line for conducting interviews with its faculty and experts. The use of this line is available free-of-charge to radio news programs/stations who wish to interview UCI faculty and experts. Use of the ISDN line is subject to availability and approval by the university.

Farnaz Khadem | EurekAlert!
Further information:
http://www.uci.edu

More articles from Studies and Analyses:

nachricht WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf

nachricht First form of therapy for childhood dementia CLN2 developed
25.04.2018 | Universitätsklinikum Hamburg-Eppendorf

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

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

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>