Promising drugs can become abandoned or underused because of tolerability issues, poor drug‑like properties, or other fixable limitations, even when there is already compelling human evidence that they work. PureTech Health starts with an unmet need and human pharmacology, then systematically dissects and solves the specific liabilities of discontinued drugs to unlock breakthroughs in an approach that has proved to be a highly efficient means of value creation. Eric Elenko, president and co‑founder of PureTech, discusses the company’s disciplined approach to drug innovation around rescuing promising but discontinued therapeutics, its hub‑and‑spoke structure, and how this model can neutralize emotional bias, enforce clear success criteria, and turn partially derisked assets into commercial successes.

Most cancer therapies hit one or a few pathways that tumors can escape by mutating, activating alternative survival routes, or pumping drugs out, leading to relapse and poor survival in indications such as liver, ovarian, and prostate cancer. Nuago is developing single-construct short RNAs that simultaneously silence many survival genes in cancer cells to achieve durable tumor cell killing with minimal toxicity to normal tissue. Nuago CEO Robert Schickel discusses the biology behind toxic RNA seeds and tumor-suppressive microRNAs; the company’s lead programs in liver, ovarian, and prostate cancer; and the implications if its cancer-agnostic RNA platform can live up to its preclinical promise.

Gout may be one of the oldest known forms of arthritis, but it remains widely misunderstood, undertreated, and a source of silent suffering for millions of people who are often blamed for their disease rather than offered effective care. Current therapies to lower urate levels suffer from limitations and safety challenges. Crystalys Therapeutics is in late-stage development of a next‑generation urate inhibitor that is already approved in Japan and China. Crystalys CEO James Mackay discusses the biology of gout, why standard therapies often fail to get uric acid to target levels, and how the company’s next‑generation URAT1 inhibitor may fill the treatment gap and change daily life for patients living with moderate to severe gout.