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New Drug Shows Promise for Aging Health

Elamipretide may improve health in older adults by targeting mitochondria.

Wayne Mitchell, Gavin Pharaoh, Alexander Tyshkovskiy, Matthew Campbell, David J. Marcinek, Vadim N. Gladyshev

― 5 min read


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As we grow older, our bodies tend to feel like a worn-out machine. Imagine your car getting rusty and breaking down more frequently over time. Similarly, our health can take a hit as we age, leading to increased healthcare costs. Issues like cancer, heart disease, and problems with our nerves become more common, especially as the population gets older.

The Aging Process and Health Declines

There's a theory called the geroscience hypothesis, which suggests that if we can find ways to slow down the aging process itself, we might prevent many health problems. This means not just treating sicknesses but tackling the root cause: aging. Currently, there's a big need for safe and effective treatments that can help improve overall health as we age.

Sarcopenia, or the loss of muscle strength and mass, is a big problem for older adults, affecting up to 45% of seniors. Meanwhile, Heart Failure is a leading cause of death among older people. The Interventions Testing Program (ITP) has spotted some promising treatments that might help extend how long we live in good health, but many of these have shown more success in male mice than in females. This difference raises important questions about how our bodies respond to treatments as we age.

A New Drug on the Block: Elamipretide (ELAM)

A new drug called Elamipretide (ELAM) is making waves in the world of health. It's designed to target mitochondria, the powerhouse of our cells. Mitochondria are essential for producing energy, and their dysfunction is linked to numerous health issues, especially as we age. ELAM has shown success in treating rare genetic diseases and age-related conditions like heart failure and neurological disorders.

This drug is known to target mitochondria efficiently, concentrating in them while causing minimal side effects. Scientists believe that ELAM enhances the way mitochondria produce energy, which could potentially help improve health in older individuals.

Researching the Effects of ELAM

Researchers conducted a study where they gave ELAM to both young (5 months old) and old (24 months old) male and female mice over 8 weeks. They measured various health indicators, like muscle strength and heart function, both before and after the treatment.

After 8 weeks, mice that received ELAM showed improvements in heart function and reduced frailty, especially the older mice. The scientists also looked at changes in muscle strength, and although they found declines in strength with age, ELAM seemed to help female mice maintain their muscle performance better during strenuous activities.

Analyzing Molecular Effects

To get a deeper understanding of how ELAM works, the scientists examined the molecular changes in the mice after treatment. They looked at changes in the heart and muscle tissues, focusing on gene expression and DNA changes that might indicate biological age. Surprisingly, while they observed positive changes in the mice's physical abilities, these didn't always match up with significant changes in the underlying molecular markers of aging.

Biomarkers are like indicators or signals that can tell us about health status. They can indicate how old our cells are biologically, which might not always correspond to how we feel physically. Even though the mice showed improvements, the researchers found no substantial effects on the biological age of heart and muscle tissues after ELAM treatment.

The Curious Case of Function vs. Molecular Age

The findings raise some intriguing questions. It seems that improvements in how the mice functioned didn't directly translate to changes in their biological markers. In simple terms, the mice felt better and performed better, but their "real age" at the cellular level stayed the same. This suggests that the connection between physical capabilities and molecular age isn't as straightforward as one might think.

It’s similar to how you can feel sprightly and energetic at 80 while your joints might say otherwise. Researchers are starting to wonder if treating the symptoms of age-related declines in function is enough, or if we also need to focus on the deeper molecular levels to fully tackle aging.

A Glimpse into the Future

This study shines light on the potential of ELAM as a treatment to help improve health in older adults. By enhancing mitochondrial function, it appears to offer a way to counteract some aging effects. However, the disconnect between improved physical function and unchanged biological markers suggests that there's still much to learn about aging and health.

Future research may explore whether other treatments that focus on mitochondria can not only improve physical performance but also influence biological age. There’s also a possibility that other things, such as diet and lifestyle, could play a crucial role in aging and health outcomes.

Conclusion: Keeping the Aging Issues at Bay

In sum, as our world faces an aging population, understanding how to keep our health in check is more important than ever. While treatments like ELAM show promise, the need for more research into the connection between physical health, biological age, and the efficacy of interventions remains clear. After all, if we can help people feel better and live longer, isn’t that a win-win?

As we look toward the future, who knows? With ongoing research and innovative treatments, we might just find the keys to aging gracefully, like a fine wine that only gets better with time, or perhaps like a beloved old car that runs smoothly with the right care. Cheers to that!

Original Source

Title: The mitochondrial-targeted peptide therapeutic elamipretide improves cardiac and skeletal muscle function during aging without detectable changes in tissue epigenetic or transcriptomic age

Abstract: Aging-related decreases in cardiac and skeletal muscle function are strongly associated with various comorbidities. Elamipretide (ELAM), a novel mitochondrial-targeted peptide, has demonstrated broad therapeutic efficacy in ameliorating disease conditions associated with mitochondrial dysfunction across both clinical and pre-clinical models. ELAM is proposed to restore mitochondrial bioenergetic function by stabilizing inner membrane structure and increasing oxidative phosphorylation coupling and efficiency. Although ELAM treatment effectively attenuates physiological declines in multiple tissues in rodent aging models, it remains unclear whether these functional improvements correlate with favorable changes in molecular biomarkers of aging. Herein, we investigated the impact of 8-week ELAM treatment on pre- and post-measures of C57BL/6J mice frailty, skeletal muscle, and cardiac muscle function, coupled with post-treatment assessments of biological age and affected molecular pathways. We found that health status, as measured by frailty index, cardiac strain, diastolic function, and skeletal muscle force are significantly diminished with age, with skeletal muscle force changing in a sex-dependent manner. Conversely, ELAM mitigated frailty accumulation and was able to partially reverse these declines, as evidenced by treatment-induced increases in cardiac strain and muscle fatigue resistance. Despite these improvements, we did not detect statistically significant changes in gene expression or DNA methylation profiles indicative of molecular reorganization or reduced biological age in most ELAM-treated groups. However, pathway analyses revealed that ELAM treatment showed pro-longevity shifts in gene expression such as upregulation of genes involved in fatty acid metabolism, mitochondrial translation and oxidative phosphorylation, and downregulation of inflammation. Together, these results indicate that ELAM treatment is effective at mitigating signs of sarcopenia and heart failure in an aging mouse model, but that these functional improvements occur independently of detectable changes in epigenetic and transcriptomic age. Thus, some age-related changes in function may be uncoupled from changes in molecular biological age.

Authors: Wayne Mitchell, Gavin Pharaoh, Alexander Tyshkovskiy, Matthew Campbell, David J. Marcinek, Vadim N. Gladyshev

Last Update: 2024-10-31 00:00:00

Language: English

Source URL: https://www.biorxiv.org/content/10.1101/2024.10.30.620676

Source PDF: https://www.biorxiv.org/content/10.1101/2024.10.30.620676.full.pdf

Licence: https://creativecommons.org/licenses/by-nc/4.0/

Changes: This summary was created with assistance from AI and may have inaccuracies. For accurate information, please refer to the original source documents linked here.

Thank you to biorxiv for use of its open access interoperability.

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