Drugs / posdinemab
last change Mar 2026 re-read 3 minutes ago

posdinemab

also known as JNJ-63733657

Monoclonal antibody targets MAPT via inhibition

Developed for
Alzheimer disease
Investigated by
Janssen Research & Development, LLC · Janssen Pharmaceutical K.K.

Trials 4

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 13 trials
Phase 1 NCT05407818 Jun → Aug 2022 — Janssen Research & Development, LLC Completed No outcome recorded
Phase 1 NCT03689153 Sep 2018 → Jul 2019 — Janssen Pharmaceutical K.K. Completed No outcome recorded
Phase 1 NCT03375697 Dec 2017 → Dec 2019 Alzheimer disease Janssen Research & Development, LLC Completed No outcome recorded
Phase 21 trial · 1 missed
Phase 2 NCT04619420 Jan 2021 → Oct 2025 Alzheimer disease Janssen Research & Development, LLC Terminated Missed primary

News releases announcing trial results or a regulatory action · 2

DateIssuerRelease
2025-11-21 Janssen Research & Development, LLC Results Johnson & Johnson Statement on the Auτonomy Study jnj.com ↗
Following a scheduled review that determined posdinemab did not achieve statistical significance in slowing clinical decline, the Auτonomy study will be discontinued.
2025-07-24 Janssen Research & Development, LLC Results Johnson & Johnson showcases latest advancements in Alzheimer's research at AAIC 2025 jnj.com ↗
Early data from robust Autonomy Phase 2b posdinemab trial demonstrate Company's leadership in multimodal biomarkers and early detection

Evidence & citations 6 cited values

Every value below carries the sentence it was read from. 6 sources stand behind the page.

FieldValueCited text
Known as posdinemab “Posdinemab (JNJ-63733657), a humanized IgG1/kappa monoclonal antibody that targets phosphorylated Tau protein at amino acid 217 (p217+tau), is currently in clinical development...” PMID 41431125 ↗ Dec 2025
Known as JNJ-63733657 ClinicalTrials.gov intervention name — accepted as the source's own label NCT03375697 ↗
3

NCT04619420 ↗

NCT03689153 ↗

NCT05407818 ↗

Action Inhibit “induced dose-dependent reductions in p217+tau levels in cerebrospinal fluid (CSF)” PMID 41431125 ↗ Dec 2025
1

“Microtubule-associated protein tau inhibitor” CHEMBL4650402 ↗

Modality Monoclonal antibody “a humanized IgG1/kappa monoclonal antibody” PMID 41431125 ↗ Dec 2025
Route Intravenous “Subjects will receive single (Part 1) or multiple (Part 2) ascending dose levels of JNJ-63733657 intravenously.” NCT03375697 ↗
Target MAPT “Microtubule-associated protein tau inhibitor” CHEMBL4650402 ↗