Herpes viruses and tumors evolved to learn how to manipulate the same ancient RNA

Herpes viral infections use the ancient genetic material found in the human genome to proliferate, mimicking the same process tumors have been found to manipulate, Mount Sinai researchers have shown for the first time. These observations provide further insight into how herpes viruses can manipulate the immune system in ways that may drive neurodegenerative diseases like Alzheimer's, according to the study, published in Nature Communications in January. The researchers found that herpes viruses appear to manipulate an ancient RNA species that originated several million years ago, called human satellite II RNA (HSATII RNA). HSATII RNA is normally inactive, but both herpes viruses and cancer cells have essentially learned to activate it, using this RNA to manipulate their environment to help them invade the body and grow.
The researchers believe that both viruses and cancer cells figured out how to use this RNA because they both rapidly evolve to test out different strategies to multiply and spread within the body over time. Researchers have yet to understand whether herpes and cancer came upon this strategy coincidentally or whether they work hand in hand in some cases. Several researchers involved in this work pioneered the study of how a different type of RNA affects tumor evolution.