Overview

Assessing Changes in Multi-parametric MRI in Patients With Acute Demyelinating Lesions Taking Clemastine Fumarate as a Myelin Repair Therapy

Status:
Not yet recruiting
Trial end date:
2026-10-30
Target enrollment:
0
Participant gender:
All
Summary
The clinical trial is intended to assess for clinical evidence of Clemastine Fumarate as a myelin repair therapy in patients with acute inflammatory injury-causing demyelination as measured by multi-parametric MRI assessments. No reparative therapies exist for the treatment of acute demyelinating lesions. Clemastine fumarate was identified along with a series of other antimuscarinic medications as a potential remyelinating agent using the micropillar screen (BIMA) developed at the University of California, San Francisco (UCSF). Following in vivo validation, an FDA IND exemption was granted to investigate clemastine for the treatment of multiple sclerosis in the context of chronic optic neuropathy. That pilot study was recently completed and is the first randomized control trial documenting efficacy for a putative remyelinating agent for the treatment of MS. The preselected primary efficacy endpoint (visual evoked potential) was met and a strong trend to benefit was seen for the principal secondary endpoint assessing function (low contrast visual acuity). That trial number was 13-11577. This study seeks to follow up on that study and examine clemastine fumarate's protective and reparative effects in the context of acute demyelinating brain lesions as imaged by multi-parametric MRI assessments. The investigators will be assessing the effects of clemastine fumarate as a remyelinating therapy and assessing its effect on MRI metrics of lesions found in patients with a confirmed diagnosis of acute inflammatory injury-causing demyelination. In addition to using conventional multi-parametric MRI assessments, this study will also evaluate a new MRI technique called Ultrashort Echo Time (UTE) MRI to assess the effects of clemastine fumarate as a remyelinating therapy of acute lesions found in patients with a confirmed diagnosis of acute inflammatory injury-causing demyelination and compare it to the other assessments.
Phase:
Phase 1/Phase 2
Accepts Healthy Volunteers?
No
Details
Lead Sponsor:
University of California, San Francisco
Treatments:
Clemastine
Criteria
Inclusion Criteria:

- Written informed consent must be obtained prior to any assessment being performed.

- Patients diagnosed with relapsing remitting multiple sclerosis and a disease duration
of < 15 years

- Male or female patients aged 18-55 years (inclusive)

- Use of appropriate contraception during period of trial (women). Before entry women
must be:

- Post-menopausal for at least 1 year OR

- Surgically sterile (have had a hysterectomy or bilateral oophorectomy, tubal
ligation, male partner vasectomy or otherwise incapable of pregnancy) OR

- Practicing a highly effective method of birth control if sexually active,
including hormonal prescription oral contraceptives, contraceptive injections,
contraceptive patch, intrauterine device, double barrier method (e.g., condoms,
diaphragm or cervical cap with spermicidal foam, cream or gel), or male partner
sterilization consistent with local regulations regarding use of birth control
methods for patients participating in clinical trials, for the duration of their
participation in the study OR

- Not heterosexually active (patients who are not heterosexually active at
screening must agree to utilize a highly effective method of birth control if
they become heterosexually active during their participation in the study) OR

- Practicing true abstinence (when this is in line with the preferred and usual
lifestyle of the subject) Period abstinence (e.g., calendar, ovulation,
symptothermal, post ovulation methods) is not an acceptable method.

Exclusion Criteria:

- Radiologic identification of marked brain atrophy relative to patients age based on
recent MRI and interpretation of expert neuroradiologist or PI

- New lesion in most recent MRI (within 3 months)

- Hypersensitivity to clemastine or other arylalkylamine antihistamines, or any of the
excipients.

- Treatment with corticosteroids within 30 days prior to screening.

- Expanded Disability Status Scale (EDSS) ≥ 4.5

- History of significant cardiac conduction block.

- History of cancer.

- Suicidal ideation or behavior in 6 months prior to baseline.

- Pregnancy, breastfeeding or planning to become pregnant.

- Involved with other study protocols simultaneously without prior approval.

- Concomitant use of any other putative remyelinating therapy as determined by the
investigator.

- Prior treatment with total lymphoid irradiation, T cell or T cell receptor
vaccination.

- Prior treatment with alemtuzumab, mitoxantrone, or cyclophosphamide.

- Serum creatinine > 1.5 mg/dL; aspartate transaminase (AST), alanine transaminase
(ALT), or alkaline phosphatase > 2 times the upper limit of normal. (Reported within
72 hours)

- History of drug or alcohol abuse within the past year.

- Untreated B12 deficiency (as determined by B12 serological assessments and metabolites
including methylmalonic acid [MMA] and homocysteine) or untreated hypothyroidism.

- Clinically significant cardiac, metabolic, hematologic, hepatic, immunologic,
urologic, endocrinologic, neurologic, pulmonary, psychiatric, dermatologic, allergic,
renal, or other major diseases that in the PI's judgment may affect the interpretation
of study results or patient safety.

- History of or presence of clinically significant medical illness or laboratory
abnormality that, in the opinion of the investigator would preclude participation in
the study

- Inability to participate in MRI, including extreme claustrophobia.

- Any dental braces or permanent or undetachable metals in the jaw or face.