# Awakening Heart Cells to Repair Infarction Damage New mRNA technique stimulates heart muscle cell division to restore function after cardiac injury. - **Source:** [ANSA – Top News](https://www.ansa.it) - **Published:** 2026-11-09 - **Topic:** [health](https://brifing.si/c/health) - **Original article:** - **On Brifing:** https://brifing.si/s/e61154c0-fda2-49bc-a08e-8c94b8c70b13 ## Regenerating Cardiac Muscle Tissue Researchers have developed a novel technique to awaken heart muscle cells, encouraging them to divide and repair damage caused by heart attacks. Tested on mice, this therapy successfully strengthened the heartbeat and increased blood pumping capacity by 10 percent. This breakthrough offers a potential new path for treating permanent cardiac tissue loss. ## The Challenge of Heart Damage Following a heart attack, the human heart can lose up to one billion cells that lack the natural ability to regenerate. This significant loss reduces contraction strength, often leading to scar tissue formation, chronic heart failure, and mortality. Current medical therapies only manage symptoms rather than restoring the lost muscle tissue itself. ## Mechanism of mRNA Intervention The study, led by Catherine Wilson and James Hudson, utilizes messenger RNA to instruct cells to produce two specific proteins: Myc and Cyclin T1. These proteins are essential for promoting the repair and division of cardiac muscle cells. This targeted approach aims to stimulate regeneration while minimizing risks associated with uncontrolled cell growth. ## Observed Functional Improvements Observations conducted on mice at 28 days and 12 weeks post-injection demonstrated a durable improvement in cardiac functionality. The technique is specifically designed to have a time-limited effect, which helps mitigate the risk of excessive cell proliferation. These results suggest that the intervention provides a sustained benefit to the damaged heart muscle. ## International Research Collaboration The research was a collaborative effort between the University of Cambridge in the United Kingdom and the Qimr Berghofer Medical Research Institute in Australia. Italian researchers from the universities of Bologna and Trieste also contributed to the study. Their combined expertise was published in the journal Nature Cardiovascular Research, highlighting the global scientific interest. ## Path to Human Clinical Trials While the initial results in mice are promising, the research team emphasizes that further studies are required. Future experiments must be conducted on larger animal models to confirm the safety and efficacy of the method. Only after these rigorous validation steps can the team consider moving toward clinical trials involving human patients. ## Limitations and Safety Protocols The therapy is engineered to be temporary, ensuring that the stimulation of cell division does not become permanent or dangerous. By controlling the duration of protein expression, the researchers aim to prevent the formation of tumors or other complications. This safety-first design is critical for any future therapeutic application in humans. ## Significance for Future Cardiology If human trials yield results similar to those observed in mice, this technique could significantly impact millions of people suffering from heart disease. By moving beyond symptom management toward actual muscle regeneration, this approach represents a major shift in how medical professionals might treat the long-term consequences of severe cardiac infarction events. ## Sources covering this story - https://www.ansa.it/canale_scienza/notizie/biotech/2026/11/09/risvegliate-le-cellule-del-cuore-per-riparare-i-danni-dellinfarto-_31068555-9b60-437a-98e2-fab3ba215fc0.html — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._