ALS treatment delays disease and extends life in rats

ALS treatment delays disease and extends life in rats
Transplanted neural progenitor cells (green), the protein GDNF (red) and motor neurons (blue) together in brain tissue. A new study showed that by releasing GDNF into the brain, the transplanted cells helped support motor neurons, delaying the onset of disease and extending survival in animal models of ALS. The image was produced using a confocal microscope; colors were generated by staining with fluorescent antibodies. Credit: Cedars-Sinai Board of Governors Regenerative Medicine Institute

Investigators at Cedars-Sinai are exploring a new way to treat amyotrophic lateral sclerosis (ALS) by transplanting specially engineered neural cells into the brain. Their new study shows the transplanted cells delayed disease progression and extended survival in animal models.

ALS, also known as Lou Gehrig's disease, is a neurological disorder that causes progressive paralysis and ultimately death. Although drugs and mechanical devices can help alleviate symptoms such as muscle spasms, there is no effective treatment, and most patients die within five years. More than 12,000 people in the U.S. have ALS, according to the National Institutes of Health.

"If we are able in the future to reproduce our research results in humans, we could improve both the quality and length of life for patients diagnosed with this devastating disease," said Gretchen Thomsen, PhD, assistant professor of Biomedical Sciences and a research scientist at the Cedars-Sinai Board of Governors Regenerative Medicine Institute. Thomsen was the first author of the study, published today in the journal Stem Cells.

For the study, investigators genetically reprogrammed to secrete a special protein known as GDNF and then transplanted the into the brain cortices of animal models of ALS. GDNF helps sustain , which support the body's . In ALS patients, glial cells lack certain proteins and become sick, and the motor neurons gradually die off, causing paralysis.

Once inside the cortex, the in the study matured into glial cells and released GDNF into the brain—a major scientific achievement in itself. Laboratory rats that received the transplants lived 8 percent longer and were free of paralysis 10 percent longer than were untreated animals. Motor neurons in the spine, which control muscle movement, also survived longer in the experimental group.

While the research results showed promise, more preclinical studies are needed to determine which treatment levels may be adequate and safe, Thomsen said. Cedars-Sinai investigators currently are performing these studies as preliminary steps to creating proposals for clinical trials.

A Cedars-Sinai team already is conducting a clinical trial that uses similarly reprogrammed, GDNF-producing progenitor cells and transplants them into the spinal cords of ALS patients. The trial, announced in 2016, is ongoing. Other initiatives at Cedars-Sinai that seek to understand ALS and develop effective treatments for it include a study published in March in Stem Cell Reports that revealed the brain's blood vessels can activate genes known to trigger spinal motor neurons to grow, and a 2016 study published in the journal Science that found immune cells in the brain play a direct role in the development of ALS.

"Cedars-Sinai is committed to pursuing groundbreaking research that aims to one day eradicate ALS and the profound human suffering of this disease," said Shlomo Melmed, MB, ChB, executive vice president, Academic Affairs, and dean of the medical faculty at Cedars-Sinai. "Today's study significantly advances that drive."


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More information: Gretchen M. Thomsen et al, Transplantation of Neural Progenitor Cells Expressing Glial Cell Line-Derived Neurotrophic Factor into the Motor Cortex as a Strategy to Treat Amyotrophic Lateral Sclerosis, STEM CELLS (2018). DOI: 10.1002/stem.2825
Journal information: Stem Cells , Stem Cell Reports , Science

Citation: ALS treatment delays disease and extends life in rats (2018, April 18) retrieved 17 August 2019 from https://medicalxpress.com/news/2018-04-als-treatment-disease-life-rats.html
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