ORYZON presents vafidemstat 12-month clinical data from its Phase IIa clinical trials ETHERAL and REIMAGINE-AD in Alzheimer’s at the virtual AD/PD-2021 conference

logo oryzon

MADRID, SPAIN and CAMBRIDGE, MA, UNITED STATES, March 9th, 2021 - Oryzon Genomics, S.A. (ISIN  Code: ES0167733015, ORY), a clinical-stage biopharmaceutical company leveraging epigenetics to develop  therapies in diseases with strong unmet medical need, announces that it will present today new data from its Alzheimer's trials with vafidemstat, ETHERAL and REIMAGINE-AD, at the 15th International Conference on Alzheimer’s and Parkinson’s Diseases and related neurological disorders, AD/PD-2021, which will be held on March 9-14 in virtual format. 

Dr Carlos Buesa, Oryzon’s Chief Executive Officer, said: “We are pleased to report these data at AD/PD2021, confirming the previous findings on the safety of vafidemstat in Alzheimer’s disease and its efficacy in controlling aggression and agitation. By modulating the histone modifying enzyme LSD1, vafidemstat has been shown to have potential in Alzheimer’s and a range of other CNS diseases, including as personalized medicine in genetically defined subpopulations of certain psychiatric diseases, and we are looking forward to continuing clinical development and bringing this exciting product to patients.” Oryzon will present safety and efficacy data after 12 months of treatment from its vafidemstat’s Phase IIa trial in mild and moderate Alzheimer's Disease (AD), ETHERAL. The e-poster, entitled “TOPLINE ETHERAL PHASE II TRIAL DATA” and presented by Dr. Michael Ropacki, Oryzon’s Chief Medical Officer for CNS, confirms the previously reported preliminary results from the European cohort of ETHERAL.

This new data from the 116 patients from the European cohort and 24 patients of the US cohort confirm that ETHERAL has met its primary endpoint. Aggregated data from these 140 patients demonstrate that vafidemstat exhibits a good safety profile and is well tolerated by AD patients, with very few safety events (only 2 drug-related SAEs were reported in the placebo group and 2 in the intervention arms). There were also changes in relevant biomarkers. In the aggregated data of the 140 patients, vafidemstat significantly reduced the levels of proinflammatory protein YKL40 in CSF during the first 6-month treatmentperiod, and these reductions were maintained after 12-month treatment in both treatment arms. This result is consistent with previous preclinical investigations where vafidemstat significantly reduced YKL40levels in preclinical models of nervous system inflammation. In the AD patients treated with high-dose vafidemstat, a signal of reduction was observed in the neurofilament light chain, a biomarker predictive of AD progression. No significant changes were observed in other CSF biomarkers. Analysis of the cognitive assessments shows that there were no significant differences in cognition among the three experimental groups through the first 6-month treatment period in the aggregated 140 patients from the EU and US cohorts. MRI analysis and other study parameters are still under evaluation.

In parallel, Oryzon has also evaluated the capability of vafidemstat to reduce aggression and agitation in an open-label Phase IIa study called REIMAGINE AD, in agitated/aggressive moderate or severe AD patients.  Vafidemstat showed a significant clinical improvement in the various clinical agitation/aggression scales after the initially scheduled 6 months of treatment, as previously reported at AAT-ADPD 2020. Following an anecdotal observation of an improvement in cognition after 2 and 6 months, moderate AD patients were offered to continue in the study for 6 additional months and two of them accepted to continue for the second 6-month period. A significant reduction of agitation/aggression after 12 months of treatment was  observed in these patients with a good safety and tolerability profile. The initial anecdotal observation of a cognitive improvement on the MMSE after 6 months of treatment in these patients was confirmed at 12 months, with cognitive improvements in the MMSE of 4 to 9 points from baseline at month 12.These data will be presented by Dr. Carlos Buesa in an e-poster entitled "REIMAGINE-AD VAFIDEMSTAT SHOWS EFFICACY IN ALZHEIMER-RELATED AGITATION & AGGRESSION AFTER 12 MONTHS".

A copy of the ETHERAL poster is available here

A copy of the REIMAGINE-AD poster is available here

For more information about this conference, please visit the AD/PD-2021 website

Contact information


Ashley R. Robinson 
LifeSci Advisors, LLC

+1 617 430 7577 


IR & Media, US & Europe:

Mary-Ann Chang


+44 7483 284 853



Patricia Cobo/Carlos C. Ungría

pcobo@atrevia.com - cungria@atrevia.com

+34 91 564 07 25


Emili Torrel - BD Director - etorrell@oryzon.com

+34 93 515 13 13

Attached files
More information

About Oryzon

Founded in 2000 in Barcelona, Spain, Oryzon (ISIN Code: ES0167733015) is a clinical stage biopharmaceutical company considered as the European champion in Epigenetics. Oryzon has one of the strongest portfolios in the field. Oryzon’s LSD1 program has rendered two compounds, vafidemstat and iadademstat, in Phase II clinical trials. In addition, Oryzon has ongoing programs for developing inhibitors against other epigenetic targets. Oryzon has a strong technological platform for biomarker identification and performs biomarker and target validation for a variety of malignant and neurological diseases. Oryzon has offices in Spain and the United States. Oryzon is one of the most liquid biotech stocks in Europe with +90 M shares negotiated in 2020 (ORY:SM / ORY.MC / ORYZF US OTC mkt). For more information, visit https://www.oryzon.com

About Vafidemstat 

Vafidemstat (ORY-2001) is an oral, CNS optimized LSD1 inhibitor. The molecule acts on several levels: it reduces cognitive impairment, including memory loss and neuroinflammation, and at the same time has neuroprotective effects. In animal studies vafidemstat not only restores memory but reduces the exacerbated aggressiveness of SAMP8 mice, a model for accelerated aging and Alzheimer’s disease (AD), to normal levels and also reduces social avoidance and enhances sociability in murine models. In addition, vafidemstat exhibits fast, strong and durable efficacy in several preclinical models of multiple sclerosis (MS). Oryzon has performed two Phase IIa clinical trials in aggressiveness in patients with different psychiatric disorders (REIMAGINE) and in aggressive/agitated patients with moderate or severe AD (REIMAGINE-AD), with positive preliminary clinical results reported in both. Additional finalized Phase IIa clinical trials with vafidemstat include the ETHERAL trial in patients with Mild to Moderate AD, where a significant reduction of the inflammatory biomarker YKL40 has been observed after 6 months of treatment, and the pilot, small scale SATEEN trial in Relapse-Remitting and Secondary Progressive MS. A Phase IIb trial in borderline personality disorder (PORTICO) has been recently authorized and the company is preparing a Phase IIb trial in schizophrenia patients (EVOLUTION). Vafidemstat is also being explored in a Phase II in severe Covid-19 patients (ESCAPE) assessing the capability of the drug to prevent ARDS, one of the most severe complications of the viral infection.