Ancient viral remnant in chimpanzees linked to LINC00662 gene silencing

Lund University researchers have identified a link between an ancient viral pandemic and genetic differences between humans and chimpanzees. The PTERV1 retrovirus, which infected chimpanzee ancestors millions of years ago, left genetic remnants that systematically silence the LINC00662 gene through methylation.

Brain organoid experiments revealed that while LINC00662 is active in human models and crucial for early brain development, it remains completely inactive in chimpanzee models due to these viral sequences. Using CRISPR-Cas9, scientists are investigating how removing this ancient viral DNA restores gene expression, highlighting how viral evolution has shaped distinct regulatory differences in human and primate brain development.

Editor's note: The brief accurately summarizes the core scientific findings and the methodology used by the researchers.