EG-501 for Cognitive Impairment in Neuropsychiatric SLE (NPSLE): Efficacy and Safety Study

NCT ID: NCT07281105

Last Updated: 2025-12-15

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 131 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-08-23
• Study Completion Date: 2025-08-12

Brief Summary

Neuropsychiatric systemic lupus erythematosus with cognitive impairment (NPSLE-CI) is a serious, disabling, and potentially life-threatening manifestation of SLE, affecting up to 80% of patients with cognitive impairments ("brain fog"), leading to substantial disability, approximately 2 times higher unemployment risk, reduced health-related quality of life (HRQoL), and mortality 2-14 times higher than the general population (standardized mortality ratio, SMR). No approved therapies exist for NPSLE cognitive dysfunction, representing a high-priority unmet need for this FDA-recognized serious condition with major functional and psychosocial burden. The objective of this study is to evaluate the safety, tolerability and efficacy of EG-501 in a precise patient subset with NPSLE. Participants will complete a full 14-week clinical trial, receiving either EG-501 or a placebo.

Detailed Description

Protocol EG-501-2.1 is a Phase 2, multi-site, randomized, double-blind, placebo-controlled trial evaluating the efficacy, safety, and tolerability of EG-501 for the treatment of cognitive impairment in systemic lupus erythematosus (SLE). The primary objective was to assess whether a 12-week EG-501 regimen produces a statistically and clinically significant improvement in the Total Scale Index score of the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS®), compared with matched placebo, in a precisely defined SLE population with objective cognitive impairment. Fifty-six (56) patients were randomized treatment, 30 to placebo group and 26 to EG-501 group. All but three patients were female. Median age was 44.0 and 45.5 for placebo and EG-501 groups, respectively. With patients recruited only from the US, racial distribution was about 2/3 white, 1/3 black, with ethnicity reflecting largely non-Hispanic demographics.

Conditions

Neuropsychiatric Systemic Lupus Erythematosus; Systemic Lupus Erythematosus (SLE); Cognitive Impairment

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: TRIPLE

Study Groups

Drug: Placebo

At randomization, subjects will receive one matching placebo capsule twice per day for one week. One matching placebo capsule twice per day will be taken for the next week (Week 2), then one matching placebo capsule in the morning and two capsules at night for one week (Week 3), and finally two capsules twice per day for three weeks (Weeks 4-6). Maximum tolerated number of capsules will be determined at this time and this dose will be continued for an additional six weeks.

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DRUG

The placebo will match the study drug in appearance, dose, and frequency. It will not contain any active drug (EG-501).

Drug: EG-501

EG-501/ EG-MNTP-01, Strength: 5 mg or 10 mg, oral capsules

At randomization, subjects will receive 5 mg twice per day for one week. Dose will be escalated to 10 mg twice per day for one week, then 10 mg in the morning and 20 mg at night for one week, and finally 20 mg twice per day for three weeks. Maximum tolerated will be determined at this time and this dose will be continued for an additional six weeks.

Group Type: EXPERIMENTAL

EG-501

Intervention Type: DRUG

EG-501/ EG-MNTP-01 is an oral, low-affinity NMDA receptor antagonist.

Interventions

Placebo

The placebo will match the study drug in appearance, dose, and frequency. It will not contain any active drug (EG-501).

Intervention Type: DRUG

EG-501

EG-501/ EG-MNTP-01 is an oral, low-affinity NMDA receptor antagonist.

Intervention Type: DRUG

Other Intervention Names

EG-MNTP-01

Eligibility Criteria

Inclusion Criteria

1. Physician diagnosis of SLE;

2. Report NPSLE symptoms on the screening survey recommended by EULAR guideline but limited to a subset of the psychiatric manifestations questions and using a cut-off score of at least 5, with a minimum of 2.5 being scored on section 1;

3. Score ≤ 85 on the RBANS total index (≤ 1 SD below the normative mean of 100)

Exclusion Criteria

1. Male and female subjects <18 or >69 years;

2. Change in medication that may affect mood or cognition including prednisone, antidepressant medications, analgesics including opioids, or stimulants within the last 4 weeks;

3. Metabolic derangement defined as liver function tests >3x upper limit of normal, or severe renal disease defined as calculated creatinine clearance<30 mL;

4. Severe psychiatric disease including schizophrenia, psychosis, suicidal depression, or substance abuse disorder;

5. Other factors which in the opinion of the investigator could potentially impact the study outcomes (e.g., underlying disease, medications, history)* or prevent the participant from completing the protocol (poor compliance or unpredictable schedule);

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 69 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Vanderbilt University Medical Center

OTHER

Sponsor Role: collaborator

Evergreen Therapeutics, Inc.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Leslie J. Crofford, M.D.

Role: PRINCIPAL_INVESTIGATOR

Vanderbilt University Medical Center

Locations

Cleveland Clinic

Cleveland, Ohio, United States

Vanderbilt University Medical Center

Nashville, Tennessee, United States

UT Health Houston

Houston, Texas, United States

Countries

United States

Other Identifiers

EG-501-2.1

Identifier Type: -

Identifier Source: org_study_id