Modulating ApoE Signalling to Reduce Brain Inflammation, deLirium and postopErative Cognitive Dysfunction (MARBLE)

Miles Berger, MD PhD

Status and phase

Completed

Phase 2

Conditions

Postoperative Delirium

Postoperative Cognitive Dysfunction

Treatments

Drug: CN-105

Drug: Placebo

Study type

Interventional

Funder types

Other

Identifiers

NCT03802396

Pro00088855

Details and patient eligibility

About

Full description

This research study will evaluate the effectiveness and estimate the feasibility of administering an investigational drug called 'CN-105' (the study drug), to prevent postoperative cognitive decline, delirium (serious confusion) and underlying brain inflammatory and brain activity changes in adults 60 years and older undergoing surgery. The word "investigational" means the study drug is still being tested in research studies and is not approved by the U.S. Food and Drug Administration (FDA).

It is hoped that CN-105 will block signaling via a gene known as ApoE4, the most common gene implicated in late life Alzheimer's disease.

Depending on when patients enroll in this study, participants will receive either a placebo or a progressively higher dose of CN-105 until the safest and best tolerated dose is reached. The study drug is given via IV (intravenous, meaning through a vein) infusion in the hospital. Study drug infusions will be given up to 4 days after surgery.

Participants will also perform memory and thinking tests, as well as complete a survey and functional assessments, both prior to surgery and again 6 weeks after surgery. Each of those research visits will last about 1 hour.

Additionally, the investigators will collect a blood sample and a cerebrospinal fluid (CSF) sample prior to the participant's surgery, 24 hours after surgery, and again 6 weeks after surgery. To obtain the CSF (cerebrospinal fluid) sample, investigators will perform a lumbar (the lower part of the spinal column) puncture. During surgery, investigators will also record participant brain waves from the scalp using an EEG (electroencephalography) monitor. An electroencephalography monitor reads the electrical activity of the brain in different places using a cap with sensors that is worn on the head.

Although previous studies have not found any associations between the study drug and any serious medical problems, investigators will monitor its effect on wound healing and postoperative infections.

Benefits of this study include the possibility of fewer problems in thinking and memory after surgery if this study drug works as hoped.

Risks of participation in this study include headache, infection/discomfort from the lumbar puncture, discomfort from the blood draw, and minor skin irritation or redness from the EEG and heart rate monitor procedures.

Enrollment

203 patients

Sex

All

Ages

60+ years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Age ≥ 60
Ability to speak English
Undergoing non-cardiac, non-neurologic surgical procedures; surgery scheduled to last > 2 hours; due to be admitted to the hospital following surgery

Exclusion criteria

Inmate of a correctional facility
Scheduled to receive systemic chemotherapy between the time of the two cognitive testing sessions
Known inability to undergo LPs due to anticoagulant use, severe anxiety, or other clinical contraindication known ahead of time.
Inappropriate for study inclusion based on the judgement of the principal investigator.
If a patient undergoes major head trauma that occurs between the times of the two cognitive testing sessions, then they will be withdrawn from the study.