The protocol is being withdrawn prior to enrollment due to a redesign of the study approach under the existing IND.
Summary
This is a randomized, double-blinded, placebo-controlled dose escalating first in human study to evaluate the safety, tolerability, pharmacokinetic (PK), pharmacodynamic (PD) of GSM-779690T. The study will have two parts: a single ascending dose (SAD) component and a multiple ascending dose (MAD) component. The goal of this study is to learn if GSM-779690T is safe and to assess the effects on levels of specific Aβ peptide isoforms in adults.
SAD: A total of 48 healthy volunteers are planned to be consented and enrolled to receive a single oral dose of GSM-779690T at increasing strengths or placebo in Cohorts 1 through 6.
MAD: A total of 48 healthy volunteers are planned to be consented and enrolled to receive multiple oral doses of GSM-779690T (doses will be informed by SAD data) in Cohorts 7 through 10. Cohort 10 will include healthy older-adults.
Participants who have signed an informed consent and meet screening eligibility requirements will be randomly assigned to receive a single oral dose of GSM-779690T or placebo with a 3:1 (active: placebo) ratio at each dose level. The decision to escalate between dose levels in the SAD and to proceed to the MAD will be based on Data Review Committee review of prior cohorts, safety, tolerability, and PK data. The study treatment, GSM-779690T, and all protocol assessments will be administered at the study site by trained study site personnel.
Protocol Amendment History
2 amendments
This ClinicalTrials.gov record has been amended 2 times since 2025-08-26; most recent amendment 2026-01-05.
Status change: Not Yet Recruiting → Withdrawn2026-01-05