ANVS401 Improves Cognition in Alzheimer Disease, Parkinson Disease


With successful completion of the phase 2a study, Annovis plans on evaluating ANVS401 in late-stage studies starting in late 2021.

Maria L. Macceccini

Maria L. Macceccini

Newly published interim results from an ongoing phase 2a clinical trial (NCT04524351) demonstrated that treatment with ANVS401 (Annovis Bio) is associated with statistically significant improvement in cognition as measured by the Alzheimer’s Disease Assessment Scale-Cognitive Subscale 11 (ADAS-Cog11).1

Thus far, 14 patients with Parkinson disease (PD) and 14 patients with Alzheimer disease (AD) have been treated and have completed biomarker analysis. The remaining 40 patients are currently being treated with different doses to determine the optimal dose.

Patients treated with ANVS401 for 25 days showed a statistically significant 4.4-point improvement (30%) on the ADAS-Cog11 (P = .04), and when compared with placebo, investigators recorded a 3.3 point (22%; (P = .13) improvement on the ADAS-Cog11.

Notably, this is the first double-blind, placebo-controlled study to demonstrate cognitive improvements in patients with AD using ADAS-Cog11 and functional improvements in patients with PD as measured by the Movement Disorder Society - Unified Parkinson’s Disease Rating Scale (MDS-UPDRS).

"We previously reported that ANVS401 significant increased speed, coordination and motor function in PD patients in this trial. We set up this study to measure the toxic cascade leading to nerve cell death and loss of function and its reversal in AD and PD,” Maria L. Macceccini, chief executive officer, Annovis Bio, said in a statement.1 “Since the study was powered to investigate changes in biomarker levels, not to demonstrate efficacy, we believe these results are that much more impactful.”

Annovis plans on requesting a meeting with the FDA to discuss the results once the trial is completed, as the current data and previous clinical results support the advancement of ANVS401 into late-stage studies, which the company is targeting in late 2021 assuming successful completion of this trial.

The investigators observed no adverse events that could have been ascribed to ANVS401, with the safety profile remaining consistent with prior safety data.

"Seeing efficacy in both paitent populations supports our hypothesis that the impairment of axonal transport, the information highway of the nerve cell, affects nerve cells in the same way in both diseases,” Macceccini added.1 “The toxic cascade in neurodegeneration begins with high levels of neurotoxic proteins, which impair axonal transport, increase inflammation and eventually lead to nerve cell death and permanent loss of cognition and function.”

Annovis previously released positive data from this phase 2a study in March, indicating that ANVS401 may improve speed and coordination in patients with PD. Results showed statistically significant improvement in speed of execution (P = .04) regardless of comparison with baseline or with placebo.2

In these same patients, improvements in coordination were also observed, though those changes were not statistically significant (P = .07). Notably, patients remained stable throughout treatment, whereas those treated with placebo experienced more complications.

Patients treated with placebo either stayed the same or performed worse compared with baseline in all the MDS-UPDRS compared to the ANVS401-treated group, which either stayed the same or performed better than at baseline.

1. Annovis Bio announces positive phase 2 data- ANVS401 improves cognition in Alzheimer disease- patients’ cognition improved 3.3 points on ADAS-Cog11. News release. Annovis Bio. May 21, 2021. Accessed May 25, 2021.
2. Annovis Bio announces positive phase 2 data- interim data shows ANVS401 improves speed and coordination in Parkinson’s patients. News release. Annovis Bio. March 16, 2021. Accessed May 25, 2021.
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