Spotlight by CU Innovations

In a recent interview with CU Innovations, Dr. Achim Klug, Professor of Physiology & Biophysics at CU Anschutz, shared exciting developments about a revolutionary treatment for age-related hearing loss that challenges everything we thought we knew about hearing restoration.

The Problem With Current Solutions

Dr. Klug's work addresses a widespread yet often misunderstood condition: central hearing loss, which affects the brain rather than the ears themselves. If you've ever struggled to follow a conversation in a noisy restaurant despite having "perfect hearing" according to traditional tests, you've experienced this phenomenon firsthand. The frustrating reality is that conventional hearing aids can't help with this condition because they're designed to amplify sound at the ear level, not address how the brain processes and filters auditory information.

This affects an astounding number of people—approximately one-third of adults between 40 and 65, and half of those 65 and older. That's millions of people who currently have no effective treatment options.

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  A Novel Approach: Drug Plus Sound

  What makes Dr. Klug's research particularly innovative is the treatment approach itself: a one-month combination therapy pairing medication with specially engineered sound. The goal isn't just temporary relief but lasting, long-term improvement in the brain's ability to isolate sounds of interest from background noise.

  The treatment is designed to be simple, non-invasive, and benign—critical factors for widespread adoption, especially among older populations who may already be managing multiple health conditions.

  From Bats to Breakthrough

  Dr. Klug's path to this discovery is as fascinating as the treatment itself. His career began studying echolocation in bats, drawn initially by scientific curiosity and the opportunity to work in exotic locations. But he recognized the profound medical relevance of these brain circuits in humans and pivoted to understanding what changes during aging—and crucially, how to reverse it.

  His motivation is deeply personal and urgent. As he notes in the interview, affected listeners consistently tell him to "work faster" because they desperately want this treatment. That human element drives the research forward.

  What's Next?

  The timeline is remarkably encouraging. Dr. Klug's team recently received FDA approval for Phase 2 clinical trials and planned to begin enrolling participants in October. The technology has been licensed to Parley Neurotech Inc., led by Dr. Sam Budoff as CEO, and the team is actively seeking venture capital investment to accelerate development and bring the treatment to market.

  Perhaps most exciting are the potential future applications. While the current focus is on age-related hearing loss, the same treatment may benefit people with autism, individuals who've experienced significant noise exposure (including factory workers and military veterans), and those suffering from tinnitus. Each of these populations represents millions more people who could potentially benefit from this groundbreaking approach.

  A Paradigm Shift in Hearing Medicine

  What stands out most about Dr. Klug's work is that it represents the first treatment for hearing loss caused by the brain rather than the ears. This isn't just an incremental improvement—it's a fundamental shift in how we approach hearing restoration, opening up an entirely new category of therapeutic intervention.

  For the millions of people who struggle to hear clearly in everyday situations despite normal ear function, this research offers genuine hope. The combination of solid science, FDA approval, and a clear path to commercialization suggests we may soon see a world where central hearing loss is no longer an untreatable condition but a manageable one.

  As Dr. Klug and his team move forward with clinical trials, they're not just developing a new treatment—they're potentially transforming the lives of millions of people who've been told there's nothing that can help them. That's the kind of innovation that deserves our attention and support.

  Here is the link to the interview.

The Silent Threat: Why Treating Hearing Loss Matters for Healthy Aging

In the quest for healthy aging, we often focus on diet, exercise, and mental stimulation. Yet one critical factor frequently goes unaddressed: hearing loss. Research increasingly shows that untreated hearing loss isn't just an inconvenience—it's actually the largest modifiable risk factor for healthy aging, with far-reaching consequences beyond simply missing parts of conversations.

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  Understanding the Ripple Effect

  When hearing begins to fade, it doesn't occur in isolation. The impacts cascade through multiple aspects of life:

  Cognitive Decline and Dementia Risk

  Perhaps most alarming is the strong link between untreated hearing loss and cognitive decline. Studies show that individuals with untreated hearing loss experience a faster rate of cognitive decline and face up to a 5 times higher risk of developing dementia, including Alzheimer's disease.

  Why does this happen? When your brain constantly struggles to interpret sounds and speech, it redirects resources from other cognitive functions. This "cognitive load" theory means your brain works harder on basic hearing tasks, leaving fewer resources for memory and other cognitive processes.

  Social Isolation and Loneliness

  When conversation becomes challenging, many people begin to withdraw from social activities. Dinners at restaurants become frustrating exercises in strain and embarrassment. Phone calls turn into guessing games. Eventually, many choose to avoid these situations altogether.

  This withdrawal leads to isolation, which research has identified as a major health risk. The loneliness that follows isn't just emotionally painful—it's physically damaging.

  Depression and Mental Health

  The combination of communication difficulties and social isolation creates fertile ground for depression. Studies show people with untreated hearing loss have significantly higher rates of depression, anxiety, and stress. Mental health struggles further compromise quality of life and can accelerate other health issues.

  A Preventable Cascade

  What makes these connections particularly tragic is that they're largely preventable. Unlike many age-related changes, hearing loss can typically be addressed effectively with proper interventions:

  • Hearing aids have evolved dramatically from the bulky devices of the past. Today's options are often nearly invisible, with sophisticated technology that filters background noise and enhances speech.

  • Cochlear implants can help those with more severe hearing loss that hearing aids cannot adequately address.

  • Assistive listening devices can help in specific situations like watching television or talking on the phone.

  Overcoming Hesitation

  Despite these solutions, many resist addressing their hearing loss. The average person waits seven years after first noticing hearing problems before seeking help. Common barriers include:

  • Stigma: Concerns about appearing "old" or disabled

  • Denial: Believing the problem isn't serious or affects others more than themselves

  • Cost concerns: Worries about the expense of hearing technology

  • Previous bad experiences: Outdated impressions of hearing aid effectiveness

  Taking Action for Healthy Aging

  If you've noticed changes in your hearing—perhaps turning up the TV volume, frequently asking people to repeat themselves, or struggling to follow conversations in noisy environments—consider these steps:

  1. Get a baseline hearing test, even if you don't think you have a problem. Early detection means earlier intervention.

  2. Discuss results with hearing professionals who can explain your options without pressure.

  3. Give adjustment time if you do need hearing aids. Like any new technology, there's a learning curve, but persistence pays off.

  4. Remember the stakes – this isn't just about hearing better; it's about protecting your cognitive health, emotional wellbeing, and social connections.

  Conclusion

  In our pursuit of healthy aging, addressing hearing loss represents low-hanging fruit—a modifiable risk factor with effective solutions already available. By overcoming hesitation and seeking appropriate treatment, we can potentially reduce risk for dementia, depression, and social isolation while improving overall quality of life.

  Don't let untreated hearing loss silently shape your future. The conversation you save may be much more than social—it might be your cognitive health, your emotional wellbeing, and ultimately, your independence as you age.

  [This blog post is for informational purposes only and is not intended as medical advice. Please consult healthcare professionals regarding your specific health concerns.]

Age-Related Hearing Loss: What Happens in the Ear as We Age

As we journey through life, our bodies undergo countless changes, and our ears are no exception. Age-related hearing loss, medically known as presbycusis, affects millions of older adults worldwide. While many people accept hearing difficulties as an inevitable part of aging, understanding what actually happens inside the ear can help us better address and treat these changes.

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  The Delicate Architecture of Hearing

  Our ability to hear depends on an intricate system within the inner ear, particularly within a snail-shaped structure called the cochlea. Inside the cochlea are thousands of tiny hair cells that serve as sensory receptors. These microscopic cells are responsible for converting sound vibrations into electrical signals that travel to the brain.

  These hair cells are remarkable but vulnerable structures. Unlike many cells in our body, cochlear hair cells cannot regenerate once damaged or destroyed. This permanent nature of hair cell loss is at the heart of most age-related hearing problems. As you can imagine, many research groups are trying very hard to find medical treatments that would regenerate these hair cells during a listener’s lifetime, but this challenge turns out to be much more difficult than anticipated. There is no such treatment to date and there is none that is just around the corner. This is especially perplexing since many vertebrate animals can regenerate these hair cells, such as birds, lizards and others. It’s just the mammals that lost this ability which is why scientists initially thought this problem should be pretty easy to solve.

  The Progression of Age-Related Hearing Loss

  One of the most common patterns in age-related hearing loss is that it typically begins with difficulty hearing high-frequency sounds. This is why many older adults might report:

  • Trouble understanding women's and children's voices, which tend to be higher-pitched

  • Difficulty distinguishing consonant sounds like "s," "f," "th," and "ph"

  • Problems hearing birds chirping or electronics beeping

  This pattern occurs because the hair cells that detect higher-frequency sounds are located at the base of the cochlea, where sound enters first. These cells endure more "wear and tear" over a lifetime and often deteriorate first.

  Why Do Hair Cells Die?

  Several factors contribute to the gradual loss of cochlear hair cells:

  1. Cumulative noise exposure: A lifetime of sound exposure, even at moderate levels, can damage hair cells over time

  2. Reduced blood flow: Age-related vascular changes can reduce blood supply to the inner ear

  3. Genetic predisposition: Family history plays a significant role in determining susceptibility

  4. Oxidative stress: Free radical damage accumulates in the cochlea over time

  5. Medical conditions: Diabetes, heart disease, and certain medications can accelerate hair cell loss

  Again, once these delicate cells die, the loss is permanent with current medical technology. This irreversible nature makes prevention particularly important.

  Effective Treatment Through Hearing Aids

  The good news is that modern hearing aids can effectively treat most cases of age-related hearing loss. Today's hearing aids are technological marvels compared to devices from even a decade ago:

  • Digital processing allows for precise amplification of specific frequencies

  • Directional microphones help focus on conversation in noisy environments

  • Connectivity features enable direct streaming from phones and other devices

  • Rechargeable batteries eliminate the hassle of tiny battery replacements

  • Nearly invisible designs address aesthetic concerns

  Many users report significant improvements in quality of life after being properly fitted with appropriate hearing devices. The key is early intervention—addressing hearing loss before the brain begins to lose its ability to process certain sounds.

  Beyond the Ear: Age-Related Changes in the Brain

  While this article has focused on the ear-level changes in age-related hearing loss, it's important to recognize that hearing happens in the brain, not just the ear. In fact, there's another type of hearing loss that affects many older adults: central auditory processing disorder.

  This brain-based hearing difficulty involves how the central auditory system processes sound information. Even when sounds are detected by healthy hair cells and transmitted through intact auditory nerves, the brain may struggle to make sense of what's being heard. This can manifest as difficulty understanding speech in background noise, following rapid speech, or locating the source of sounds—even when standard hearing tests show relatively normal results. A future blog post will discuss this question.

  [This blog post is for informational purposes only and is not intended as medical advice. Please consult healthcare professionals regarding your specific health concerns.]