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Crystal Gateway Marriott

Sep 23, 2026 8:15 AM - Sep 25, 2026 12:45 PM

1700 Richmond Highway, Arlington, VA 22202, USA

DIA/FDA Oligonucleotide-Based Therapeutics Conference

Convening industry and health authorities to inform, educate, and share advancements in oligonucleotide-based therapeutic product development.

Session 9 Track 2: From Data to Decisions: Evolving the Regulatory Landscape for Oligonucleotide Therapeutics

Session Chair(s)

Xuan  Chi, DRSc, MD

Xuan Chi, DRSc, MD

Supervisory Pharmacologist, CDER, FDA, United States

Ronald  Wange, PhD

Ronald Wange, PhD

Principal Consultant, Aclairo Pharmaceutical Development Group, Inc., United States

Presentations in this session will review general toxicology and carcinogenicity data gathered and analyzed by regulatory agencies and industry for oligonucleotide therapeutics with well-characterized mechanisms and compositions. The aim is to inform and enhance regulatory decision-making by applying risk-based approaches that build on existing knowledge and determine best practices for evaluating new chemistries.

Learning Objective : At the conclusion of this session, participants should be able to:
  • Understand the principles and examples of applying knowledge from “well characterized ONTs”, and discuss any concerns or challenges of this approach
  • Identify data gaps for “well characterized ONTs” for certain endpoints
  • Suggest innovative approaches to address the data gaps or challenges discussed above

Speaker(s)

Christine  Siezen, PhD

Comparative Analysis of Chronic vs. Sub-chronic Toxicity Study Findings with Well-characterized ONTs

Christine Siezen, PhD

Senior Nonclinical Assessor, Dutch Medicines Evaluation Board, Netherlands

Elena  Braithwaite, PhD

FDA Experience with Carcinogenicity Assessment of Oligonucleotide-based Products

Elena Braithwaite, PhD

Toxicologist, FDA, United States

Scott  Henry, DrPH

Carcinogenicity Assessment Strategies for ONTs: OSWG Perspectives and Key Considerations

Scott Henry, DrPH

Senior Vice President, Nonclinical Development, Ionis Pharmaceuticals, Inc., United States

Takasumi  Shimomoto, DVM, PhD

Speaker

Takasumi Shimomoto, DVM, PhD

Associate Senior Scientist for Toxicology, Pharmaceuticals and Medical Devices Agency, Japan

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