“Unraveling the Mysteries of Martin Hetzer, Lifelong RNA Persistence: Insights into Cellular Longevity”
Martin Hetzer, returning to Austria after two decades in the United States to assume the presidency of the Institute of Science and Technology Austria (ISTA) in 2023, continues to delve into the realm of aging research. One year into his tenure, the molecular biologist remains captivated by the enigmatic processes governing aging in vital organs like the brain, heart, and pancreas. Of particular interest are neurons, which endure for the entirety of an organism’s lifespan, potentially serving as a linchpin in understanding neurodegenerative disorders such as Alzheimer’s disease.
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Martin Hetzer
Collaborating with Tomohisa Toda from Martin Hetzer Friedrich-Alexander University Erlangen-Nürnberg (FAU) and the Max Planck Center for Physics and Medicine in Erlangen, Hetzer and colleagues recently published groundbreaking research shedding light on the persistence of RNA molecules in mammals. Their study, featured in the journal Science, marks the first demonstration of RNA longevity throughout the lifespan of mice, unveiling a new dimension to cellular function maintenance.
Intrigued by the coexistence of ancient and contemporary components within cells, Martin Hetzer draws parallels to a bustling cityscape, where old structures harmonize with modern developments. While DNA, residing at the core of the nucleus, remains unchanged from birth to demise, RNA, particularly messenger RNA (mRNA), traditionally characterized by its fleeting existence, presents a contrasting dynamic. Yet, a subset of non-coding RNAs, responsible for cellular organization and function, defy conventional transience, persisting throughout an organism’s life.
Employing innovative techniques involving Martin Hetzer RNA labeling and microscopic imaging, Hetzer’s team discovered enduring RNAs in various cell types within the brain, with a subsequent focus on neurons. Their meticulous analysis revealed a gradual reduction in RNA concentration over time, albeit with detectable levels persisting even into old age.
Further investigations uncovered the role of long-lived RNAs in safeguarding genome integrity, particularly near the heterochromatin, a region housing inactive genes. Manipulating RNA levels in neuronal progenitor cells elucidated their critical contribution to cellular viability and genomic stability, affirming their significance in the aging process.
This study underscores the indispensable function of long-lived RNAs in maintaining cellular health throughout the aging trajectory. As Hetzer and his team embark on future inquiries to unravel the intricate mechanisms underlying RNA longevity, their findings pave the way for a deeper understanding of cellular aging and potential therapeutic interventions.
