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Hearing loss could be reversed with popular erectile dysfunction drug
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Researchers may have discovered a way to reverse one type of hearing loss.
A new study found that hearing loss caused by mutations in a certain gene at birth may be reversed by a common supplement along with the erectile dysfunction drug Viagra (sildenafil).
Researchers identified mutations in a gene known as CPD — which produces the enzyme carboxypeptidase D — among three unrelated families from Turkey in which multiple people were born deaf.
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These families all had a form of inherited sensorineural hearing loss, a condition caused by damage to the tiny hair cells in the inner ear that convert sound vibrations into electrical signals sent to the brain, according to the National Institutes of Health.
To better understand the link, the scientists compared the genetic data of affected and unaffected relatives within these families. They then expanded their analysis to other groups.
A new study found that hearing loss caused by mutations in a certain gene at birth may be reversed by a common supplement along with the erectile dysfunction drug Viagra. (iStock)
“We subsequently found that CPD mutations are present in people with hearing loss in a large genome sequencing cohort from England,” study author Dr. Mustafa Tekin, professor of human genetics and chair of Department of Human Genetics at University of Miami Miller School of Medicine, told Fox News Digital.
Lab and animal tests
After turning the CPD gene “off” in human cells in laboratory tests, the researchers noted reduced levels of three substances: arginine (an amino acid), cyclic guanosine monophosphate (cGMP, an important signaling molecule) and nitric oxide, which provides vital signals to the nervous system.
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Although the study began with humans, the reversal experiments were also carried out in mice and fruit flies.
When nitric oxide and cGMP levels were low, the hair cells in the mice’s inner ears — which transmit sound signals to the brain — became overstressed and eventually died.
The authors emphasized that they are not proposing Viagra as a hearing loss treatment. (Alex Segre/UCG/Universal Images Group via Getty Images)
In fruit flies, researchers found that silencing the equivalent of the CPD gene led to defects in the organ that helps them detect sound and stay balanced.
But when the researchers administered arginine to human cells, nitric oxide levels returned to normal, resulting in fewer cells dying.
They also found that Viagra, which acts on the nitric oxide pathway, reversed some of the deficits caused by CPD mutations, Tekin added.
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These findings suggest that nitric oxide deficiency in the cochlea — the part of the inner ear that converts sound vibrations into nerve signals — may be a key driver of hearing loss. The CPD gene appears to regulate this process by maintaining proper arginine and nitric oxide levels in hair cells, which are essential for healthy signal transmission and protection against noise-related damage.
“Nitric oxide is vital for many tissues and must be kept in a fine balance,” Tekin said.
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The authors emphasized, however, that they are not proposing Viagra as a hearing loss treatment.
“We used it to strengthen the argument that nitric oxide deficiency in the ear was the underlying cause of deafness,” Tekin noted.
Experts urge caution
Outside experts also warned of an important adverse side effect of Viagra.
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The medication has been associated with rare but serious cases of sudden hearing loss as well as irreversible tinnitus, underscoring the need for caution, Dr. Nooshin Parhizkar, an ENT physician practicing in the San Francisco Bay Area, told Fox News Digital.
“At this stage, it is not appropriate or safe for the general public to use Viagra for hearing issues,” she added.
Although scientists have identified more than 200 genes linked to hearing loss, commercial genetic screening tests may only focus on the most common mutations. (iStock)
The hearing loss is usually temporary and reversible after stopping the medication, research has shown.
The Food and Drug Administration added a warning label to Viagra and other PDE5 inhibitors about the possible risk of sudden hearing loss after rare reports among those who used the same class of medication.
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It’s unclear whether this side effect is directly caused by the PDE5 inhibitors, as the affected patients may have other medical issues or could be taking other medications that could have led to the hearing loss, according to experts.
Study limitations
The study focused on a very small, genetically defined group of patients, so it is unlikely to apply to most of the population, Parhizkar pointed out.
“At this stage, it is not appropriate or safe for the general public to use Viagra for hearing issues.”
As the research also focused on reversing hearing loss in mice and flies, more studies are needed to evaluate treatment in humans.
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“It is important to get a genetic test done to find the cause of hearing loss,” Tekin advised.
Although scientists have identified more than 200 genes linked to hearing loss, commercial genetic screening tests may only focus on the most common mutations.
Fox News Digital reached out to the maker of Viagra for comment.
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Feeling lonely may take a toll on older adults’ memory — but it may not speed up cognitive decline, according to a new study.
Researchers from Colombia, Spain and Sweden analyzed data from more than 10,000 adults ages 65 to 94 across 12 European countries and found those who reported higher levels of loneliness did worse on memory tests at the start of the study, according to research published this month in the journal Aging & Mental Health.
Over a seven-year period, however, memory decline occurred at a similar rate regardless of how lonely participants felt.
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“The finding that loneliness significantly impacted memory, but not the speed of decline in memory over time was a surprising outcome,” lead author Dr. Luis Carlos Venegas-Sanabria of the School of Medicine and Health Sciences at the Universidad del Rosario said in a statement.
Loneliness may be linked to memory performance in older adults, a new study suggests. (iStock)
“It suggests that loneliness may play a more prominent role in the initial state of memory than in its progressive decline,” Venegas-Sanabria said, adding that the findings highlight the importance of addressing loneliness as a factor in cognitive performance.
The findings add to debate about whether loneliness contributes to dementia risk. While loneliness and social isolation are often considered risk factors for cognitive decline, research results have been mixed.
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The study looked at data from the long-running Survey of Health, Ageing and Retirement in Europe (SHARE), which tracked 10,217 older adults between 2012 and 2019. Participants were asked to recall words immediately and after a delay to measure memory performance.
Social isolation and loneliness could play a surprising role in cognitive health among seniors. (iStock)
Loneliness was assessed using three questions about how often participants felt isolated, left out or lacking companionship.
About 8% of participants reported high levels of loneliness at the outset. That group tended to be older, more likely to be female and more likely to have conditions such as depression.
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Researchers found that those with higher loneliness had lower scores on both immediate and delayed memory tests at baseline. Still, all groups — regardless of loneliness level — experienced similar declines in memory over time.
The results suggest loneliness may not directly accelerate the progression of memory loss, though it remains linked to poorer cognitive performance overall.
Researchers look at a brain scan at the National Institutes of Health in Bethesda, Maryland. (Saul Loeb/AFP/Getty Images)
Experts warn, however, that the findings should not be interpreted to mean loneliness is harmless.
“The finding that lonely older adults start with worse memory but don’t decline faster is actually the most interesting part of the paper, and I think it’s easy to misread,” said Jordan Weiss, Ph.D., a scientific advisor and aging expert at Assisted Living Magazine and a professor at NYU Grossman School of Medicine.
“It likely means loneliness does its damage earlier in life, well before people show up in a study like this at 65-plus,” Weiss told Fox News Digital.
By older age, long-term social patterns may already be established, making it harder to detect when the effects of loneliness first took hold, an aging expert says. (iStock)
He suggested that by older age, long-term social patterns may already be established, making it harder to detect when the effects of loneliness first took hold.
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“By the time you’re measuring someone in their late 60s, decades of social connection patterns are already baked in,” he said.
Weiss, who was not involved in the research, added that loneliness may coincide with other health conditions, and noted that participants who felt more isolated also had higher rates of depression, high-blood pressure and diabetes. The link, he said, may reflect a cluster of health risks rather than a direct cause.
“While they can go hand-in-hand, it’s not clear that loneliness contributes to dementia,” a psychotherapist says. (iStock)
Amy Morin, a Florida-based psychotherapist and author, said the findings reflect a broader pattern in research on loneliness and brain health, and that the relationship may be more complex than it appears.
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“The evidence shows there’s a link between loneliness and cognitive decline but there’s no direct evidence of a cause and effect relationship,” she said. “So while they can go hand-in-hand, it’s not clear that loneliness contributes to dementia.”
Morin added that loneliness, which can fluctuate, may not be the root of the problem, but rather a symptom of other underlying mental or physical health issues.
Researchers suggested screening for loneliness be incorporated into routine cognitive assessments as one way to support healthy aging. (iStock)
She said staying socially and mentally engaged is crucial for overall brain health.
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“It’s important to be proactive about social activities,” Morin said. “Joining a book club, having coffee with a friend, or attending faith-based services can be a powerful way to maintain connections in older age.”
The researchers also suggested screening for loneliness be incorporated into routine cognitive assessments as one way to support healthy aging.
Fox News Digital reached out to the researchers for comment.
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Research continues to uncover new details on how fasting may help extend life.
A new study published in the journal Nature Communications investigated how intermittent fasting can boost longevity in small worms often used in aging research.
Researchers from the University of Texas Southwestern Medical Center in Dallas compared worms that were fed normally to those that underwent a 24-hour fast in early adulthood and were then fed again, according to a press release.
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The scientists measured a variety of factors, including stored fat, gene activity related to fat metabolism and lifespan.
The results showed that the life-boosting benefit did not depend on the fasting itself but on the body’s behavior after eating again.
Experts say sustainability is key when choosing a long-term weight-loss strategy. (iStock)
Study lead Peter Douglas, associate professor of molecular biology and a member of the Hamon Center for Regenerative Science and Medicine at UT Southwestern, suggested that these discoveries “shift the focus toward a neglected side of the metabolic coin – the re-feeding phase.”
“Our data suggest that the health-promoting effects of intermittent fasting are not merely a product of the fast itself, but are dependent on how the metabolic machinery recalibrates during the subsequent transition back to a fed state,” he said.
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“Our findings bridge a gap between lipid metabolism and aging research,” he added. “By targeting aging, the single greatest risk factor for human disease, we move beyond treating isolated conditions toward a preventive model of medicine that enhances quality of life for all individuals.”
Lauri Wright, director of nutrition programs at the University of South Florida’s College of Public Health, called this a “high-quality” study that adds an “important nuance to how we think about fasting and longevity.”
Intermittent fasting typically involves limiting meals to an eight-hour daily window or fasting every other day. (iStock)
The benefits of the refeeding phase after fasting were “especially interesting,” Wright, who was not involved in the study, told Fox News Digital.
“The researchers showed that longevity was linked to the body’s ability to turn off fat breakdown after fasting, allowing cells to restore energy balance,” she reiterated.
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“From a scientific standpoint, that’s a meaningful shift because it suggests fasting is not just about burning fat, but about metabolic flexibility.”
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Fasting may support longevity through triggering metabolic switching, enhancing cellular repair and stress resistance and improving markers like insulin sensitivity, research shows.
Limitations and cautions
Although this study provides “important insight” on the power of refeeding, Wright noted that the findings should be approached with caution, as the study was done on worms and cannot always be translated to humans.
“Additionally, it explains how a process might work in a controlled lab condition rather than real-world eating behaviors,” she added as a limitation. “Finally, the study is short-term and doesn’t give us the long-term translation on lifespan outcomes.”
The review found intermittent fasting was barely more effective than doing nothing, according to the study authors. (iStock)
Wright cautioned that fasting is “not a magic solution for longevity, and how you eat overall matters more than when you eat.”
“I advise, first and foremost, to focus on diet quality, including a variety of fruits and vegetables, healthy fats and minimally processed foods,” she said.
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For those who are considering fasting, it’s better to stick with a moderate plan — like a 12- to 14-hour overnight fast — rather than going to extremes, Wright said. After fasting, she recommends focusing on well-balanced meals.
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Several groups of people should be cautioned against fasting, according to Wright, including those with diabetes who are on insulin or hypoglycemic medications, those who are pregnant or breastfeeding, anyone with a history of eating disorders and older adults at risk of malnutrition.
Anyone considering intermittent fasting should consult with a doctor before starting.
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