Mirror Image Biology

The Mirror Biology Dialogues Fund asked the National Academies to hold a workshop on mirror biology to discuss the state of the science, risks, benefits, and possible governance of technology milestones leading up to the development of replication-competent, self-sufficient, mirror-image bacteria. The publication Mirror Image Biology: Pushing the Envelope in Designing Biological Systems - A Workshop captures discussions held on September 29-30, 2025 about the current biotechnology regulatory context; terminology relating to research and development toward mirror life; current research efforts towards understanding the emergence of chirality in nature, developing mirror molecules as therapeutics (stable, non-immunogenic drugs), diagnostics and biosensing, and materials science and data storage; and research aimed at advancing methods for developing synthetic ribosomes and cells and other technologies that may contribute to creating mirror molecules and cells.

Attendees discussed various types of risk to human health, including off-target effects, toxicity, in vivo functionality, potential for immune evasion or delayed recognition, chronic persistence or pollutant-like behavior, and uncertainty about adaptive immune response effectiveness. Participants explored possible ecological risks, including disruption of food webs and nutrient cycles, reduced predation because of chirality mismatch, or potential persistence and spread across ecosystems. Attendees considered frameworks for evaluating risks and benefits of mirror molecules and living cells in general and within the context of a "slippery slope" framework.

Exploring the frontiers of synthetic life, Mirror Image Biology: Pushing the Envelope in Designing Biological Systems - A Workshop brings together leading experts to examine one of the most provocative areas in modern biotechnology: the development of mirror-image biological systems. As advances in synthetic biology accelerate, the proceedings highlight scientific, ethical, and governance considerations related to the potential creation of replication-competent, self-sufficient mirror bacteria. This proceedings captures a wide-ranging dialogue on the state of mirror biology, from the fundamental science of chirality and its origins in nature to emerging efforts to engineer mirror molecules for therapeutics, diagnostics, biosensing, materials science, and data storage.