Queuosine’s protective selectivity awaits testing

This proposed study asks whether immune cells can retain antimicrobial defence while avoiding inflammation-driven tissue damage after repeated infections. It studies queuosine, a chemical mark on transfer RNA, the adaptor that reads messenger RNA, the template for protein production. In myeloid descendants, immune cells made from blood-forming stem cells, the hypothesis says it separates protective and damaging protein synthesis. The test would change queuosine while matching messenger RNA, then compare protective and damaging proteins. Sensitive codons, three-letter genetic instructions, would be swapped for synonyms with the same amino-acid sequence. Loss of the protective protein’s queuosine dependence would support the proposed mechanism; rivals could contribute.