IMMUNOLOGY2026™ Conference Recordings For Attendees-Mirror-image biomolecules: properties, applications, and why chirality matters

Video Transcription

Video Summary

The session introduced the emerging scientific debate over “mirror life,” a hypothetical form of synthetic life built from molecules with opposite chirality from natural organisms. Jolene Sweer opened by explaining that the Mirror Biology Dialogues Fund organized the event to gather expert input on risks highlighted in a 2024 Science paper. David Relman outlined why mirror bacteria could be dangerous: natural immune systems, predators, phages, and ecological controls may fail to recognize or control them, while growth could still occur on some achiral nutrients. He and colleagues concluded that the risks could be large enough that work toward creating mirror synthetic cells should not proceed now. Michael Kay then described the promise of mirror-image therapeutics, especially D-peptides, which resist degradation and can be minimally immunogenic. He explained chemical synthesis methods, mirror-image phage display, and drug development examples, but warned that enabling mirror-cell technology could also create major biosafety risks.

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Date April 16, 2026 12:45 PM - 2:15 PM

Room 153C

Session Immune responses to mirror molecules and organisms, Sponsored by the Mirror Biology Dialogues Fund (MBDF)

Speaker Michael Kay

Track Innate Immune Responses and Host Defense: Cellular Mechanisms (INC)

Year 2026

Keywords

mirror life

synthetic biology

mirror bacteria

chirality

D-peptides

biosafety risks

April 16, 2026 12:45 PM - 2:15 PM

153C

Immune responses to mirror molecules and organisms, Sponsored by the Mirror Biology Dialogues Fund (MBDF)

Michael Kay

Innate Immune Responses and Host Defense: Cellular Mechanisms (INC)

2026