Summary of Aldeyra Therapeutics 2025 R&D Day Company Overview - **Company**: Aldeyra Therapeutics (NasdaqCM: ALDX) - **Focus**: Development of RASP (Reactive Aldehyde Species) modulators for various diseases, including dry eye disease and central nervous system (CNS) diseases Key Points Industry and Product Development - **Expansion into CNS Diseases**: Aldeyra announced the expansion of its RASP platform into CNS diseases, indicating a strategic shift to target a broader range of conditions [2][8] - **Lead Product Candidate**: Reproxalap is in NDA stage for dry eye disease, with a PDUFA date set for December 16, 2025 [5][25] - **Second-Generation RASP Modulators**: ADX248 and ADX246 are being developed for various conditions, including atopic dermatitis and age-related macular degeneration [6][15][24] Clinical Trials and Results - **Reproxalap**: Demonstrated significant efficacy in reducing symptoms of dry eye disease, with pivotal data supporting both acute and chronic activity [25][26] - **ADX629**: Completed proof-of-concept trials for alcohol-associated hepatitis, showing safety and activity in reducing inflammation [11][12][14] - **ADX248**: Currently undergoing phase one clinical testing, showing promise in preclinical models for Parkinson's disease and ALS [23][24][21] Financial Position - **Capitalization**: Aldeyra reported over $75 million in cash and equivalents as of September 30, expected to support operations into the second half of 2027 [9] Mechanism of Action - **RASP Modulation**: RASP modulators like reproxalap and ADX248 target multiple proteins involved in inflammation, offering a systems-based approach to treatment [9][10] - **Potential Advantages**: Modulating RASP is likened to lowering a master volume control, providing a comprehensive pharmacological effect without the side effects associated with targeting single proteins [10] Future Directions - **Clinical Milestones**: Anticipated trial initiations in various inflammatory diseases, including those affecting the retina and skin, are expected to provide robust catalyst news flow in 2026 and beyond [31] - **Prioritization of Indications**: Atopic dermatitis is currently prioritized for ADX248, with plans for a placebo-controlled phase two trial to assess its efficacy in modulating itching [74] Regulatory and Manufacturing Updates - **FDA Inspections**: Recent inspections of manufacturing facilities for reproxalap resulted in voluntary action indicated (VAI) resolutions, supporting the quality of the product [30][49] Intellectual Property - **Unique Position**: Aldeyra claims to be the only company actively pursuing RASP modulation as a therapeutic target, focusing on the composition of matter for its IP strategy [40][41] Additional Insights - **CNS Disease Models**: The company is exploring the effects of RASP modulation in various neuroinflammatory diseases, with promising results in preclinical models [17][18][23] - **Behavioral Correlates**: Improvements in grip strength and motor function in animal models are being correlated with biochemical markers, indicating potential clinical relevance [59][60] This summary encapsulates the critical developments and strategic directions of Aldeyra Therapeutics as discussed during the 2025 R&D Day, highlighting the company's innovative approach to treating inflammatory diseases through RASP modulation.