The ultimate goal of precision medicine is a unique drug for each patient. However, this N-of-1 model directly conflicts with the current economic and regulatory system, which incentivizes developing drugs for large populations to recoup massive R&D and approval costs.

For gene editing to achieve its potential, companies must solve an economic problem, not just a scientific one. The key is developing a manufacturing system that dramatically lowers costs, making one-time cures for the "long tail" of rare mutations financially viable and accessible.

To overcome regulatory hurdles for "N-of-1" medicines, researchers are using an "umbrella clinical trial" strategy. This approach keeps core components like the delivery system constant while only varying the patient-specific guide RNA, potentially allowing the FDA to approve the platform itself, not just a single drug.

Instead of bespoke edits for each autoimmune disease, Rumagen developed "anchor editing," targeting a single, conserved amino acid across all relevant HLA alleles. This creates a unified platform, streamlining regulatory pathways with potential for an FDA platform designation and enabling expansion into rare diseases with economies of scale.

The traditional drug-centric trial model is failing. The next evolution is trials designed to validate the *decision-making process* itself, using platforms to assign the best therapy to heterogeneous patient groups, rather than testing one drug on a narrow population.

Gene editing pioneer David Liu is developing a platform that could treat multiple, unrelated genetic diseases with a single therapeutic. By editing tRNAs to overcome common nonsense mutations, one therapy could address a wide range of conditions, dramatically increasing scalability and reducing costs.

The FDA now allows a single, well-designed pivotal trial instead of the traditional two. This reform significantly cuts costs by $100M-$300M and shortens development timelines, enabling companies to test twice as many potential drugs with the same capital.

The Innovative Genomics Institute is tackling rare diseases by creating a standardized platform. By keeping elements like the delivery vehicle and enzyme constant and only changing the guide RNA, they aim to create a repeatable 'bucket trial' process for developing hundreds of cures, not just one-offs.

While the FDA's new "plausible mechanism framework" is officially for bespoke, N-of-one therapies, experts at its rollout expressed an expectation that its principles could be applied more broadly. This suggests a potential new pathway for other rare diseases, moving beyond an ultra-rare scope.