Amyotrophic lateral sclerosis is a cruel disease. It causes the nerves that control muscles to die. When these upper and lower motoneurons degenerate, it causes weakness, muscle atrophy, muscle cramps, and twitching. Patients with progressed ALS lose the ability to walk and to move, and ultimately lose the ability to swallow and to breathe.
Unfortunately, there is no cure for this disease. Two drugs, riluzole, and edavarone, can help slow the progression of amyotrophic lateral sclerosis; however, these treatments cannot stop the disease.
Stem cells are an intriguing potential option for those wanting to manage symptoms from neurodegenerative diseases like ALS. The hypothesis is simple. Scientists are aggressively pursuing stem cell research to treat amyotrophic lateral sclerosis to study the use of stem cells to potentially restore diseased nerve cells in ALS which may help to restore muscle function. Drs. Gugliandolo, Bramanti, and Mazzon recently reviewed the potential use of mesenchymal stem cells for the treatment of ALS.
Mesenchymal stem cells can be gathered from many different sites in the body including bone marrow, umbilical cord, or adipose (fat) cells. The stem cells can then become several different cells in the body, including nerve cells (i.e. neurons). Mesenchymal stem cells also produce and release (e.g. through exosomes) an astounding number of molecules that help other cells grow and develop. Thus, mesenchymal stem cells can not only become new nerve cells, they can support other nerve cells’ growth and development.
The authors describe in detail the potential for mesenchymal stem cells to help treat ALS. The review shows the many successful uses of stem cells in animals (mice) that have experimental ALS. In short, stem cells slowed the loss of motor function (muscle activity), delayed the progression of ALS, and increased length of survival.
Clinical trials of mesenchymal stem cells to treat ALS are in Phase I and Phase II, however initial results are encouraging. First of all, treatment with these stem cells is safe in patients with ALS—no serious adverse events have been reported in any of the trials reviewed in the journal article. In at least 9 clinical trials, mesenchymal stem cells slowed disease progression in patients with ALS to some degree.
Patients with ALS and those who care for them should note that while these trials have shown that mesenchymal stem cells are safe and at least partially effective in the treatment of ALS, Phase I and Phase II clinical trials only have a relatively small number of patients compared to Phase III trials. Nonetheless, the clinical trial results thus far look promising, certainly promising enough for certain types of stem cells to advance to Phase III pivotal clinical trials.
Reference: Gugliandolo, A., et al. Mesenchymal Stem Cells: A Potential Therapeutic Approach for Amyotrophic Lateral Sclerosis? Stem Cells International. Vol. 2019, Article ID 3675627, 16 pages, 2019. https://doi.org/10.1155/2019/3675627
ALS, also known as amyotrophic lateral sclerosis or Lou Gehrig’s disease, is a progressive neurologic condition. There is no current cure for this condition and the only treatments, riluzole and edaravone, are only modestly effective at slowing the disease.
This lack of a cure or effective treatment for ALS is not for a lack of trying. There have been countless clinical trials to test treatments for ALS—almost all have ended in failure in Phase 1 or Phase 2 clinical trials. Indeed, few potential ALS treatments make it to Phase 3 trials—the final stage of clinical testing before a drug is approved by the FDA for treatment.
It is this history of failure that has sparked so much enthusiasm in a new stem cell treatment for ALS. The potential stem cell treatment for ALS is currently known by its development name, NSI-566. NSI-566 is made up of neural stem cells—cells that can become new motor neurons. NSI-566 is injected into the spinal column of patients with ALS so that the stem cells can hopefully restore motor function and improve ALS symptoms.
The Phase 1 study showed a spinal injection of NSI-566 was safe in ALS patients, a finding that was confirmed in the Phase 2 trial. Perhaps more importantly, results from the Phase 2 trial showed that patients who received stem cell treatment did substantially better 24 months later than those who received a placebo. These results were so encouraging, that NSI-566 now heads to Phase 3 clinical testing.
While it will take some time to conduct the Phase 3 clinical trial, reaching this milestone is an achievement in itself. Any Phase 3 trial design will require a relatively large number of patients, so those who are interested should occasionally check clinicaltrials.gov or speak to your neurologist about enrolling as a volunteer.
Reference: Goutman, S., et al. (2018). Long-term Phase 1/2 intraspinal stem cell transplantation outcomes in ALS. Annals of Clinical and TranslationalNeurology 2018; 5(6): 730–740
Amyotrophic lateral sclerosis or ALS is a devastating, progressive neurological disease. While the precise cause is unknown, ALS does destroy nerve cells in the spinal cord, which causes several debilitating symptoms. Often the first symptom of ALS is weakness in the hands or arms that is usually more pronounced on one side of the body. As more spinal cord nerve cells become dysfunctional and die, patients with ALS become weaker, their movements grow slower, and their muscles begin to atrophy (i.e. break down). At the same time, some muscles in the limbs become spastic, which means they are constantly in a contracted state. In later stages of ALS, patients have difficulty swallowing and breathing. Mesenchymal Stem Cell Treatment for ALS is a unique and new option.
The only drug to have any known survival benefit in ALS is riluzole. Patients who take riluzole live longer than those who do not; however, the drug does not improve function or meaningfully reduce symptoms. The only other approved ALS treatment, edaravone, may slow the rate at which ALS gets worse. However, neither of these drugs is a cure—far from it, in fact. Indeed, doctors and patients are left with virtually no effective treatment options for ALS.
Because ALS is caused by the destruction of nerve cells in the spinal cord, the regenerative properties of stem cells may offer a solution. The hypothesis is that stem cells—and exosomes collected from stem cells—can help protect, preserve, or even regenerate cells that are affected by ALS.
A flurry of research has been published over the last decade documenting the safety and possible effectiveness of mesenchymal stem cells for the treatment of ALS. In 2009, Deda et al. showed bone marrow stem cells injected into the spinal area were safe in patients with ALS, even showing that some patients had improvements in neuromuscular testing. The research groups of Karussis, Mazzini, Blanquer, and Baek showed similar safety results. Martinez et al. showed that stem cells derived from bone marrow could improve survival in patients with ALS. Rushkevich et al. showed that stem cell infusion improved the quality of life in patients with ALS.
While more work is clearly needed to determine the full effectiveness of stem cell treatment for ALS, the number of researchers working on this topic and the number of successful studies published in this area are reasons for hope. These clinical studies show that stem cell treatment for ALS is clearly safe and feasible. What is needed are larger clinical trials that specifically focus on the effectiveness of treatment, both in the near- and long-term.
Reference: Roberta Bonafede and Raffaella Mariotti. (2017). Stem cell mobilizers: ALS Pathogenesis and Therapeutic Approaches: The Role of Mesenchymal Stem Cells and Extracellular Vesicles. Frontiers in Cellular Neuroscience. 2017; 11:80.
Researchers have recently established that a hallmark of Amyotrophic Lateral Sclerosis (ALS) is endothelial cell degeneration that leads to vascular pathology. When this vascular pathology occurs, damage develops to the barrier between the blood and the central nervous system. Given this new understanding of the pathophysiology of ALS, researchers have begun looking at the potential of repairing this barrier as a strategy for treating the disease with bone marrow stem cells.
A recent study, published in Scientific Reports, addressed this issue by testing how human bone marrow cells may impact blood-spinal cord barrier repair by transplanting these cells in an ALS model. The researchers hypothesized that the cells should help to repair the barrier, reversing the damage accompanying ALS. They were also interested in whether this type of repair may improve not only the integrity of the barrier between the blood and central nervous system but also improve symptoms of ALS.
What the researchers found was that the human bone marrow cells differentiated into the type of endothelial cells that were needed for repair and successfully engrafted into the capillaries of the spinal cord in their model. Several specific observations led the scientists to conclude that these stem cells helped to effectively restore the barrier between the blood and the spinal cord.
The stem cells improved the integrity and survival of nervous system cells, including astrocytes and spinal cord motor neurons, preventing problematic changes in these cells that are associated with the breakdown of the blood-central nervous system barrier. Critically, the implantation of the stem cells also led to improvements in behaviors associated with ALS.
While there is still a lot of research to be done to establish whether bone marrow stem cells can help repair the blood-spinal cord barrier in patients with ALS, this study provides promising data. Given that there is no cure for ALS and limited treatment options, there is likely to be an emphasis on cell-based therapies for the disease. As more data become available, we will get a clearer picture as to if and how stem cells can help ALS patients.
Reference: Garbuzova-Davis,S. (2017). Endothelial and astrocytic support by human bone marrow stem cell grafts into symptomatic ALS mice towards blood-spinal cord barrier repair. Scientific Reports, 7(884).
Amyotrophic Lateral Sclerosis(ALS, Lou Gehrig’s disease) and Multiple Sclerosis (MS) are two separate diseases with some important similarities. Both ALS and MS interfere with a person’s ability to move. In both diseases, nerve cells are affected. In fact, in both diseases, cells of the immune system seem to attack and destroy the material that wraps around nerve fibers. Without this covering, nerve cells do not function properly, which is why muscle weakness and other problems occur in both ALS and MS.
Traditional treatments for MS and ALS are different. More than 15 drugs are approved to treat MS. In many patients, one or more of these treatments can help reduce flareups and perhaps slow the progression of the disease (ocrelizumab in progressive MS). ALS, on the other hand, is a very progressive condition. Two drugs (riluzole and edaravone) modestly slow down the rate at which ALS gets worse. Neither MS nor ALS, it should be mentioned, can be cured.
Because of the similarities between these distinct diseases, researchers conducted a clinical trial of both MS and ALS patients. The doctors infused mesenchymal stem cells into patients and followed their progress. The goals of the study were to determine if stem cell infusion was safe and if it was effective.
In MS patients, stem cell infusion helped reduce physical disability (mean score on the Expanded Disability Status Scale improved) for at least six months. In ALS patients, mesenchymal stem cell infusion appeared to stabilize the disease for at least six months (average score on the Amyotrophic Lateral Sclerosis Functional Rating Scale stayed the same). Given that ALS patients tend to decline rapidly, maintaining stability is actually a great success.
Interestingly, researchers conducted an MRI the day after stem cell infusion and found the stem cells were already moving to various places around the brain and spinal cord. This finding suggests that stem cell infusion works very rapidly, and that stem cells target diseased regions within the body.
It should be noted that many patients had temporary symptoms related to the injection such as fever and headache. The symptoms went away within days, however. Importantly, no major adverse events occurred during two years of follow-up.
Taken together, this research suggests that mesenchymal stem cell transplantation is a safe and effective treatment for patients with MS and ALS. Moreover, this infusion causes virtually immediate effects in the central nervous system. While more research is needed, these results may offer hope to patients with these challenging neurological diseases.
Reference: Karussis, D. et al. (2010). Safety and immunological effects of mesenchymal stem cell transplantation in patients with multiple sclerosis and amyotrophic lateral sclerosis. Archives of Neurology. 2010 Oct;67(10):1187-94.
Amyotrophic Lateral Sclerosis (ALS) causes muscle weakness that gets worse over time. This muscle weakness can be so disabling that patients may require devices to support movement and breathing. There are few drug treatments for ALS, if any, that make a meaningful difference in patients’ lives. Drugs such as riluzole and edavarone may slow the disease or help make the symptoms of ALS less troublesome; however, these drugs are only useful for a short period of time, if at all. People with amyotrophic lateral sclerosis ultimately die from this horrendous disease.
While the cause of ALS isn’t fully understood, nerves in the brain and spinal cord do become sick and eventually die. Without healthy nerve cells to control their muscles, patients with ALS experience increasing weakness, pain, and spasms.
A group of researchers conducted two clinical trials to test human stem cells in patients with amyotrophic lateral sclerosis. The researchers chose a particular type of stem cell, taken from the spinal cord, called neural stem cells. A neural stem cell can become a neuron, an astrocyte, or an oligodendrocyte—all of which are important for the function of the brain and spinal cord. The goal of this research was to see if these neural stem cells could stop or delay the progression of ALS. In other words, could these human stem cells slow down how fast ALS gets worse, even for a short time?
As expected, the researchers found that ALS patients treated with human neural stem cells continued to get worse. However, the rate at which they got worse appeared to slow down slightly. The researchers clearly showed the treatment did not make the disease worse, and the treatment was generally safe and well tolerated. The researchers note that because of the small number of patients, they were unable to make strong conclusions about the therapy. On the other hand, the researchers were able to use these clinical trial results to design larger clinical trials to be held in the future. And, since this stem cell treatment is apparently safe, they should be able to expand to larger numbers of ALS patients.
Reference: Glass, JD. et al. (2016). Transplantation of spinal cord-derived neural stem cells for ALS: Analysis of phase 1 and 2 trials. Neurology. 2016 Jul 26;87(4):392-400.
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