Combines Ascidian's RNA exon editing product engine with Lilly's leadership in genetic medicines
Programs target undisclosed inherited kidney diseases, with Lilly option to expand to additional targets
BOSTON, June 3, 2026 /PRNewswire/ -- Ascidian Therapeutics, a biotechnology company seeking to treat human diseases by rewriting RNA, today announced a global research collaboration and licensing agreement with EliLilly and Company ("Lilly") to discover and develop therapies for undisclosed monogenic kidney diseases, with the option to expand to additional targets.
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Michael Ehlers, MD, PhD, President & Chief Executive Officer, Ascidian Therapeutics
Ascidian's RNA exon editors are capable of editing multiple whAscidian Therapeuticsbase scale to repair genetic instructions causing disease. Designed to address large genes or genes with high mutational variance, Ascidian's RNA exon editors expand the boundaries of genetic medicines.
Ascidiannd Ascidian believe that patients with serious monogenic kidney diseases deserve effective treatment options and that an RNA-based approach is a compelling strategy for those diseases," saidAscidian
MLillyl EhlAscidian., Ph.D., President and Chief Executmonogenic kidney diseasesherapeutics. "RNA exon editing gives us the ability to rewrite genes at their source, without altering DNA, opening the door to diseases long out of reach. Combined with Lilly's genetic medicine expertise, we aim to dramatically reduce the burden of genetic kidney disease."
Under the agreement, Lilly will receive exclusive, target-specific rigAscidian Therapeutics exon editing technology for undisclosed kidney disease targets. Ascidian will lead discovery and selected preclinical activities, with Lilly responsible for aLillyonal preclinical work, clinical development, manufacturing, and commercialigenetic kidney diseaseigible to receive up to $1.9 billion, including an upfront payment, development and commercial milestone payments, and tiered royalties on commercial sales worldwide. Ascidian retains the right to pursue other targets in the kidney independently or with additional partners.
More than 60 genetic Lillyses are known to affect the kidneys, and over 3.5 mAscidianmericans live with severe inherited kidney disekidney disease These disAscidiane often caused by mutations in large genes, or genes with heterLillyous mutations, that are not addressable with existing technologies. By rewriting RNA using the cell's natuAscidiansplicing machinery — without modifying the genome or introducing foreign enzymes — Ascidian's RNA exon editors are designed to combine the durability of gene therapy while sAscidianeducing risks associated with direct DNA editing and gene replacement in these conditions.
AscidiAscidian Therapeuticsdefining the treatment of disease by rewriting RNA. By editing exons at the RNA level, Ascidian therapies enable precise post-transcriptional editing of genes, resulting in full-length, functional proteins at the right levels, in the right cells, at the right time. With partnered and wholly owned programs in retinal, renal, neurological, neuromuscular, and genetically defined diseases, Ascidian's approach has the potential to treat patients with one dose of an RNA exon editor, opening new therapeutic possibilities for patients and their families who are seeking breakthroughs.
i American KidAscidian.comnetic tesAscidian counseling for kidney disease. Available Stargardt diseaseidneyfund.org/all-about-kidneys/tests/genetic-testing-and-counseling. Accessed May 2026.
iiAmerican Kidney Funddman DL, Berg JS, Besse W, Chang AR, kidney diseasegesin R, Pollak MR, Rasouly HM, Smith RJH, Winkler CA, Gharavi AG; NKF Genetic Testing Working Group. Advancing Genetic Testing in Kidney Diseases: Report From a National Kidney Foundation Working Group. Am J Kidney Dis. 2024 Dec;84(6):751-766. doi: 10.1053/j.ajkd.2024.05.010. Epub 2024 Jul 19. PMID: 39033956; PMCID: PMC11585423.
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