Health
Stem-cell therapy for Parkinson's shows 'strong promise' in relieving symptoms
With around one million people living with Parkinson’s disease in the U.S. — and 90,000 getting new diagnoses each year — the race is on for a cure.
Researchers at Memorial Sloan Kettering Cancer Center (MSK) have announced progress on that front — they have developed a new therapy that uses stem cells to treat advanced Parkinson’s.
In the phase 1 trial, the researchers used donated stem cells (taken from early-stage embryos) to create nerve cells (neurons) and transplanted them into the brains of 12 Parkinson’s patients, according to a press release from MSK.
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Once the cells are injected, they produce dopamine, a hormone in the brain that helps with movement and coordination.
(One of the hallmarks of Parkinson’s is low levels of dopamine, which causes the typical symptoms of tremors, stiffness, balance issues and difficulty walking.)
Around one million people are living with Parkinson’s disease in the U.S., with 90,000 getting new diagnoses each year. (iStock)
After 18 months, the injected cells had “taken hold in the brain with no serious side effects,” the researchers reported.
Based on the MDS-UPDRS — a ratings scale for symptoms developed by the International Parkinson and Movement Disorder Society — the participants experienced “noticeable improvements,” especially the group that received a higher dose.
Patients in the high-dose group reported 2.7 hours of additional “on time” each day.
“Neurologists say things usually get a little bit worse every year with this disease, meaning the score goes up by a few points,” study co-author Lorenz Studer, MD, director of MSK’s Center for Stem Cell Biology, said in the press release.
“In our study, not only did the score not get worse, it dropped by more than 20 points in the high-dose group.”
The researchers used donated stem cells (taken from early-stage embryos) to create nerve cells (neurons) and transplanted them into the brains of 12 Parkinson’s patients. (iStock)
On average, patients in the high-dose group reported 2.7 hours of additional “on time” — indicating periods of normal functioning with minimal symptoms — “a result that could be quite meaningful for their everyday life,” Studer noted.
Given the success of the phase 1 trial, the U.S. Food and Drug Administration (FDA) has granted approval for the researchers to go straight to a phase 3 clinical trial in a much larger patient group — around 100 people — which will take place in the first half of 2025.
The findings were published in the journal Nature.
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“The study showed that developing specific nerve cells from human embryonic stem cells in the lab, then injecting them in the brain of people with Parkinson’s disease, is safe and holds significant promise as a possible future treatment,” lead study author Viviane Tabar, MD, chair of the Department of Neurosurgery at Memorial Sloan Kettering Cancer Center in New York City, told Fox News Digital.
“The findings were rewarding, as this work is more than a dozen years in the making.”
‘Major step forward’
Dr. Mary Ann Picone, medical director of the MS Center at Holy Name Medical Center in Teaneck, New Jersey, said that cells for the treatment of Parkinson’s disease could offer potential for not only slowing disability, but also stopping progression and bringing about improvement in motor function.
“Although there is risk involved in the immune suppression necessary before the stem cell implantation and the procedure itself, it would be a major step forward in replacing the dopaminergic neurons lost in the disease,” Picone, who was not involved in the study, told Fox News Digital.
Levodopa, currently the first-line treatment for Parkinson’s, is limited in that patients need greater dosage amounts as time goes on, according to Picone — “and regulating off and on periods of either stiffness or dyskinesias (uncontrolled muscle movements) becomes more difficult.”
After 18 months, the injected cells had “taken hold in the brain with no serious side effects,” the researchers reported. (iStock)
Dr. Ann Murray, director of movement disorders at WVU Rockefeller Neuroscience Institute in West Virginia, referred to the study as “unbelievably exciting” for Parkinson’s patients.
“Although the goal of this particular research project was to ensure safety, getting that significant clinical improvement in the UPDRS is absolutely groundbreaking,” Murray told Fox News Digital. (She also was not involved in the study.)
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“This is just the first step in getting this type of therapy approved for patients suffering from Parkinson’s disease, but this is an amazing first step for the potential benefits of stem cell brain therapy.”
Potential limitations
There were some limitations associated with the study, Tabar noted.
“This is a small study designed to show safety — it is critical to conduct a larger, well-controlled study to prove that the treatment indeed works, otherwise referred to as a Phase 3 ‘efficacy’ study,” she said.
“This is an amazing first step for the potential benefits of stem cell brain therapy.”
These early findings, however, are “suggestive of a strong promise.”
“I think we can finally say that stem cells, when derived and differentiated properly, hold great promise to repair the brain in Parkinson’s and potentially in other conditions someday,” Tabar said.
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The cell therapy was developed at MSK and was licensed to BlueRock Therapeutics in Massachusetts, which funded the study.
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Journalist Katie Couric is sharing a scary medical episode that she experienced on June 27.
In a post on Substack titled “The Day I’ll Never Remember,” she detailed a sudden episode that left her unable to recall the current month, year and president.
“I thought it was 2024. And I believed Joe Biden was president,” she wrote.
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The event occurred while Couric was attending the Aspen Ideas Festival in Colorado, during which she participated in two public panels — one on AI and one on journalism — both of which she cannot remember at all.
“I have no idea what we talked about, or of what occurred when the panels ended,” she said.
Journalist Katie Couric is sharing a scary medical episode that she experienced on June 27. (Getty Images)
John Molner — Couric’s husband, who was in attendance at the festival and the two panels — also shared his account.
After the event, someone told Molner that Katie wasn’t feeling well. When he reached her, an EMT and a doctor were tending to her. “I could tell something was off,” he wrote. “It could have been altitude sickness, but Katie was definitely not all there.”
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At the hospital, when Couric struggled to recall the year, the president and her grandchildren’s names, doctors began checking for a stroke.
An MRI revealed no signs of stroke, which was a relief, but “Katie’s ‘fog’ became a lot more apparent,” Molner wrote.
John Molner, Couric’s husband, who was in attendance at the festival and the two panels, also shared his account. (Getty Images)
“She repeatedly asked me the same questions: ‘What was I doing before we got to the hospital?’ ‘Why am I at the hospital?’”
Couric was ultimately diagnosed with transient global amnesia, a sudden, temporary episode of memory loss that prevents a person from forming new memories and may also erase some recent memories, according to Mayo Clinic.
“The cause seems to be as mysterious as the brain itself.”
It is not caused by a stroke, seizure or head injury, and it usually resolves completely within 24 hours.
“[It’s] just a very weird neural episode that’s pretty uncommon and, at least in most cases, is a ‘one and done’ experience,” Molner said.
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Couric said she finally began feeling “like herself” again around 9 p.m. and went to sleep at 2 a.m.
As TGA leaves a “permanent gap in memory” for the duration of the episode and for hours beforehand, Couric said that from around noon on that day until at least 7 p.m. will remain a “big, black hole.”
As TGA leaves a “permanent gap in memory” for the duration of the episode and for hours beforehand, Couric said that from around noon on that day until at least 7 p.m. will remain a “big, black hole.” (Getty Images)
Data shows that approximately three to eight people per 100,000 will have an episode of transient global amnesia, with people 50 years of age and older at higher risk.
The specific cause of TGA is not known, but some experts believe it stems from a “temporary dysfunction in the brain’s hippocampus — the area responsible for creating new memories,” Couric shared.
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“Doctors believe this is driven by brief interruptions in blood or oxygen flow, or microscopic spasm in the blood vessels.”
Episodes could potentially be triggered by intense physical exertion, emotional distress, extreme temperature changes or migraines, experts say.
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Approximately 15% of patients will have a recurrence 10 years later.
“Why did this happen to me? Was the altitude an issue? Was I dehydrated? Tired? Stressed? The literature doesn’t seem to indicate that these are contributing factors, but the cause seems to be as mysterious as the brain itself,” Couric wrote.
Anyone who experiences sudden memory loss, confusion, difficulty speaking, weakness, numbness, vision changes, severe headache or other stroke-like symptoms should seek immediate medical attention or call 911, doctors advise. (iStock)
“All I know is that those hours will be forever lost. Someone described it as my brain failing to hit the ‘record button.’”
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“While this was a freaky occurrence, it could have been much more serious. So ultimately, I’m relieved — even though several hours of a Saturday in June will always be missing for me.”
Anyone who experiences sudden memory loss, confusion, difficulty speaking, weakness, numbness, vision changes, severe headache or other stroke-like symptoms should seek immediate medical attention or call 911, doctors advise.
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Older adults identified as “super movers” are about half as likely to develop cognitive impairment than their peers.
That’s according to a recent study led by Stony Brook Medicine in New York, which evaluated the cognitive function of 4,000 adults 80 and over who participated in multiple aging and longevity studies over several years.
Among this group, 6% to 10% were classified as super movers, which means they walk at a much faster pace than others of the same age and gender — at speeds comparable to people three decades younger.
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The super movers were found to have about half the risk of cognitive decline compared to seniors with typical gait speed.
The findings were published in the journal Neurology on June 16.
Older adults identified as “super movers” are about half as likely to develop cognitive impairment than their peers. (iStock)
“The study reinforces that mobility and brain health are closely connected,” lead study author Dr. Joe Verghese, MD, neurologist at Stony Brook Medicine, told Fox News Digital. “This suggests that preserving mobility may be an important marker of healthy brain aging and resilience.”
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The most intriguing finding, according to Verghese, was that super movers maintained cognitive function despite having similar dementia-related brain changes as their peers.
In postmortem brain analysis, there was no difference in dementia-related pathologies between the super movers and the slower walkers, the study stated.
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“This suggests they may possess resilience mechanisms that help preserve brain function even in the presence of age-related changes,” he said. “Understanding these resilience factors could lead to new strategies for promoting healthy brain aging.”
As the study was observational, there were some limitations, and it does not prove that walking faster prevents dementia, the researchers noted.
Super movers were found to have about half the risk of cognitive decline compared to seniors with typical gait speed. (iStock)
“Other factors, such as cardiovascular health, physical fitness or genetics, may also contribute to both faster walking and better cognitive outcomes,” Verghese said.
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This study adds to growing evidence that what’s good for the heart and muscles also benefits the brain, he noted, adding that “staying physically active remains one of the most effective, evidence-based ways to support healthy aging.”
“Walking speed is best viewed as a marker of overall health, not a treatment.”
“The broader message is that physical activity is important at any age,” Verghese said. “Walking is an easy step-up point because you don’t need any special equipment. You can do it inside or outdoors, and you can do it on a regular basis. You can walk with a dog, you can walk with a friend.”
Any activity is beneficial if it’s done regularly and with the right intensity, he added.
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Rather than just trying to walk faster, the neurologist recommends that seniors focus on maintaining mobility through regular physical activity, strength training, balance exercises and good cardiovascular health.
“Walking speed is best viewed as a marker of overall health, not a treatment,” Verghese noted.
Major public health guidelines from the CDC and U.S. Physical Activity Guidelines recommend at least 150 minutes of moderate-intensity aerobic activity each week, such as brisk walking.
Major public health guidelines from the CDC and U.S. Physical Activity Guidelines recommend at least 150 minutes of moderate-intensity aerobic activity each week, such as brisk walking. (iStock)
This can be achieved by walking 30 minutes a day, five days a week, or about 20 to 25 minutes most days. Another option is to engage in shorter sessions that add up over the day.
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“You have to do it within your health limitations and medical conditions,” Verghese advised. “So if there are any medical concerns, I would get your physician to clear you before starting exercise.” The good thing about walking, he added, is that you can start at a slow pace and then gradually build up to a brisker pace.
“And then adding on strength and balance training, whatever age you are, I think is also important.”
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