The results of a study by researchers at the International Centre for Genetic Engineering and Biotechnology (ICGEB) suggest that the heart’s constant beating may actively suppress tumor growth in cardiac tissues. The collective findings from the team’s research in mouse models and in engineered heart tissues (EHT) suggests that this is because cellular pathways in these tissues alter gene regulation in cancer cells to keep them from proliferating. Headed by Giulio Ciucci, PhD, and Serena Zacchigna, MD, PhD, at the ICGEB Cardiovascular Biology Laboratory, the scientists say the findings shed light on the role of mechanical forces in protecting the heart from cancer and may pave the way to new cancer therapies based on mechanical stimulation. First author Ciucci, together with senior author Zacchigna and colleagues reported on their findings in Science, in a paper titled “Mechanical load inhibits cancer growth in mouse and human hearts.” In their report the authors concluded “Collectively, the data presented in this work provide evidence that mechanical load in the heart inhibits cancer cell proliferation, likely explaining the low incidence of cardiac tumors.” Heart cancer is very rare in mammals, but as the authors noted, “The mechanisms that protect the heart remain elusive.” The adult human heart in addition has a limited capacity for self-renewal, with cardiomyocytes regenerating at roughly 1% per year. “This suggests that the same mechanisms that halt the proliferation of cardiac cells could also inhibit the growth of cancer cells in the adult heart,” the authors continued. One proposed explanation…
