Mitochondrial Dysfunction: The “Mother” of All Hallmarks of Aging

We are pleased to highlight a new review by Prof. Volkmar Weissig, President of the World Mitochondria Society: “Mitochondrial dysfunction as the ‘mother’ of all hallmarks of aging” ,  published in Journal of Mitochondria, Plastids and Endosymbiosis.

This comprehensive review revisits the role of mitochondria in aging, tracing back to Denham Harman’s Mitochondrial Free Radical Theory of Aging. While mitochondrial contributions have often been underrepresented or neglected in discussions of the hallmarks of aging, Weissig synthesizes evidence showing that mitochondrial dysfunction is central to all twelve hallmarks of aging, including telomere attrition, genomic instability, epigenetic alterations, loss of proteostasis, cellular senescence, stem cell exhaustion, chronic inflammation, and more.

Marvin Edeas, Founder of WMS, states that Volkmar Weissig seeks to reposition mitochondrial dysfunction as the primary, “mother” hallmark of aging, arguing it underlies and drives all other mechanisms of aging. He calls for a paradigm shift in therapeutic strategy, moving beyond targeting isolated hallmarks toward preserving mitochondrial integrity and enhancing adaptive plasticity. It further emphasizes the need for anticipatory monitoring and systemic approaches to prevent cascading dysfunction across biological and societal levels.

Read the full article.

We are also pleased to remind you that the World Mitochondria Society (WMS), in collaboration with the International Society of Microbiota (ISM), is organizing the Targeting Longevity World Congress 2026, taking place on April 8–9 in Berlin, Germany.

Biomolecular Condensates Found to Safeguard Mitochondria During Aging

A new study in Nature Aging led by Prof. Chonglin Yang and colleagues has revealed a previously unknown mechanism that helps cells protect their powerhouses—mitochondria—during stress and aging.

The team discovered Mitochondria-Associated Translation Organelles (MATOs), a novel class of membraneless condensates formed by liquid–liquid phase separation (LLPS). These structures assemble directly on the mitochondrial surface, where they act as local protein factories.

At the center of this process is the RNA-binding protein LARP-1, which brings together ribosomes, mRNAs, and other RNA-binding proteins to produce crucial components for mitochondrial energy production and structure, such as IMMT-1 (a MICOS complex subunit for cristae organization) and ATP-2 (a key subunit of ATP synthase).

Using C. elegans as a model, the researchers showed that:

- Loss of LARP-1 or MATOs disrupts cristae organization, reduces ATP output, and shortens lifespan.

- By contrast, keeping MATOs anchored to mitochondria during stress or aging preserves mitochondrial function and significantly extends lifespan.

Mitochondrial decline is a hallmark of aging and contributes to neurodegeneration and metabolic disease. This discovery shows that biomolecular condensates directly regulate mitochondrial health, suggesting that stabilizing MATOs could become a new therapeutic strategy to combat age-related dysfunction.

Read the full article here

Exercise Does More Than Move Muscles It Moves Mitochondria

For decades, mitochondria have been described as the cell’s powerhouses - essential for energy production, yet largely silent and confined inside the cell. A new scientific review invites us to rethink that view. It suggests that exercise may do something far more profound: set mitochondria in motion and turn them into systemic messengers of health.

The review explores growing evidence that physical activity can lead to the presence of mitochondria, or mitochondrial components, in the bloodstream. These extracellular mitochondria appear in different forms - sometimes free, sometimes associated with vesicles or blood elements - pointing to a complex and still largely unexplored mode of biological communication triggered by movement.

Exercise has long been known to reshape mitochondria within muscles, the heart, and the brain. What is new here is the shift in perspective. Instead of focusing only on what happens inside cells, the authors look at what may happen between organs. The idea that mitochondria could circulate and carry signals fits with a more modern, systemic understanding of physiology, where health emerges from coordination rather than isolation.

Until now, circulating mitochondrial material has often been viewed through the lens of stress or damage, particularly mitochondrial DNA. This review challenges that narrow interpretation. It raises the possibility that extracellular mitochondria are not just by-products, but active participants in biological signaling, potentially influencing inflammation, metabolism, immune balance, and adaptation to physical effort.

Many questions remain unanswered. Where do these circulating mitochondria come from? Are they functional? Do they signal resilience, adaptation, or cellular strain - or all of these depending on context? What is clear is that this field is still in its early stages, and its implications could be far-reaching.

What makes this work especially timely is its resonance with a broader shift in medicine. Health is no longer seen as static, nor disease as purely organ-based. Instead, attention is turning toward dynamic processes, communication networks, and resilience mechanisms. In this context, mitochondria are no longer just engines of energy. They become messengers, carrying information about physiological state and adaptation.

Seen through this lens, exercise is not simply about movement, performance, or calorie expenditure. It may be a way of activating a circulating mitochondrial dialogue, coordinating responses across tissues and shaping long-term systemic health.

In the spirit of WMS 2026, this review does more than add a new mechanism. It opens a new way of thinking: What if movement speaks the language of mitochondria and mitochondria carry that message throughout the body?

Read the full article.

Nature’s Boarding Pass: How Proteins Enter Mitochondria

Scientists Reveal Exciting New Rules for Mitochondrial Protein Delivery.

Caltech researchers have discovered a whole new layer in how proteins get to mitochondria, the energy centers of our cells. This finding challenges long-held beliefs and offers a glimpse into nature’s clever engineering. 

For decades, scientists believed that mitochondrial proteins were made completely before being delivered. But the new study, published in Cell, shows that nearly 20 percent of these proteins begin their journey while still being made by ribosomes. This early delivery is called cotranslational import.

What makes this pathway special? The proteins that use it are usually large, complex, multi‑domain molecules, the kind that are difficult to fold correctly if fully formed out in the cell fluid. Folding them early and sending them off right away helps prevent them from getting stuck or forming tangled knots that could clog the mitochondrial gates.

But how does the cell know which proteins need this special route? It turns out there’s a two step signal system at play:

1. A mitochondrial targeting sequence (think of it like a boarding pass).
2. The appearance of a large folded domain the ‘code’ that unlocks the suitcase so the boarding pass can be used.

As Zikun Zhu, the lead author, puts it: “It’s like having your boarding pass locked in a suitcase. The targeting sequence is the boarding pass, but to access it you need the code to open the suitcase. In this case, the large domain is that code.” 

In fact, when the researchers added one of these large domains to proteins usually imported later, they redirected them to the cotranslational pathway showing just how powerful this signal really is.

Unlike cotranslational targeting in other cell parts, mitochondrial targeting happens later only after the big domain is ready. This strategy ensures only the right proteins enter at the right time.  

Looking ahead, the team plans to dive deeper into how this system works at a molecular level with hopes of one day tuning it for medical or biotechnological applications.  

The topic will be further discussed at the World Mitochondria Society (WMS) annual meeting in Berlin, October 2025, where leading experts will explore how such discoveries are shaping the future of mitochondrial medicine.

Read the full article here