A Study to Test How Safe Pozelimab and Cemdisiran Combination Therapy and Cemdisiran Alone Are and How Well They Work in Adult Patients With Generalized Myasthenia Gravis
a study on Myasthenia Gravis
Summary
- Eligibility
- for people ages 18 years and up (full criteria)
- Location
- at Irvine, California and other locations
- Dates
- study startedcompletion around
Description
Summary
This study is researching an experimental combination treatment with pozelimab and cemdisiran, and cemdisiran monotherapy. The study is focused on patients with generalized myasthenia gravis (gMG). Myasthenia gravis is a disease that causes weakness and fatigue in muscles in the body because the nerves and muscles are not communicating properly. The aim of the study is to see how effective pozelimab and cemdisiran are when used in combination and when pozelimab and cemdisiran are used alone for patients with gMG.
The study is looking at several other research questions, including:
- What side effects may happen from taking the study drugs
- How the study drugs work inside the body
- How much study drugs are in the blood at different times
- Whether the body makes antibodies against pozelimab and cemdisiran (which could make the drugs less effective or could lead to side effects)
Official Title
Efficacy and Safety of Pozelimab and Cemdisiran Combination Therapy and Cemdisiran Monotherapy in Patients With Symptomatic Generalized Myasthenia Gravis
Details
DBTP- Double blind treatment period (24 weeks) ETP - Extension treatment period (28 weeks) OLTP- Open label treatment period (68 weeks) Off-treatment follow up period (52 weeks)
Keywords
Generalized Myasthenia Gravis, Myasthenia Gravis, Muscle Weakness, Pozelimab + Cemdisiran, Cemdisiran, Pozelimab
Eligibility
You can join if…
Open to people ages 18 years and up
- Male or female patients ≥18 years of age at screening (or ≥ legal age of adulthood based on local regulations, whichever is older)
- Patient with documented diagnosis of myasthenia gravis (MG) based on medical history and supported by previous evaluations as described in the protocol
- Documented prior history of positive serologic test or a positive result during screening of anti-acetylcholine receptor (AChR) antibodies or anti-LRP4 antibodies.
- Myasthenia Gravis Foundation of America (MGFA) Clinical Classification Class II to IVa at screening
- Myasthenia Gravis-Activities of Daily Living (MG-ADL) score ≥6 at screening. Ocular items should not contribute more than 50% of MG-ADL total score
- Currently receiving an acetylcholinesterase inhibitor or documented reason for not using acetylcholinesterase inhibitor therapy per investigator 7. Currently receiving an immunosuppressive therapy (IST) for MG, or documented reason why the patient is not taking an IST per investigator
- If currently receiving an IST, not anticipated to have IST dosage changed before randomization or during double-blind treatment period (DBTP).
- Willing and able to comply with clinic visits and study-related procedures, including completion of the primary series of the meningococcal vaccinations required per protocol
You CAN'T join if...
- Patients with antibody profile that is only positive for muscle specific tyrosine kinase (MuSK) (MuSK positivity is based on a documented prior history of positive serologic test for antibodies to MuSK or a positive result during screening
- History of thymectomy within 12 months prior to screening or planned during the study
- History of malignant thymoma (patients with stage 1 may be enrolled), or history of cancer within the past 5 years, except for adequately treated basal cell skin cancer, squamous cell skin cancer, or in situ cervical cancer
- Myasthenic crisis or Myasthenia Gravis Foundation of America (MGFA) Class V within 1 month of screening
- Not meeting meningococcal vaccination requirements and, at a minimum, documentation of quadrivalent meningococcal vaccination within 5 years prior to the screening visit and serotype B vaccine within 3 years prior to the screening visit as described in the protocol
- Known contraindication to meningococcal vaccines (group ACWY conjugate and group B vaccines) as described in the protocol
- Patients who require antibiotics for meningococcal prophylaxis and have a contraindication, warning, or precaution precluding the use of penicillin class and penicillin-alternative antibiotics planned to be used for prophylaxis, or a history of intolerance leading to the discontinuation of these antibiotics
- Positive hepatitis B surface antigen or hepatitis C virus ribonucleic acid (RNA) during screening. NOTE: Cases with unclear interpretation should be discussed with the medical monitor
- History of HIV infection or a positive test at screening per local requirements
NOTE: Other protocol-defined Inclusion/ Exclusion Criteria apply
Locations
- University of California Irvine
accepting new patients
Irvine California 92697 United States - University of Southern California
accepting new patients
Los Angeles California 90033 United States
Details
- Status
- accepting new patients
- Start Date
- Completion Date
- (estimated)
- Sponsor
- Regeneron Pharmaceuticals
- Links
- Study Informational Website
- ID
- NCT05070858
- Phase
- Phase 3 Myasthenia Gravis Research Study
- Study Type
- Interventional
- Participants
- Expecting 235 study participants
- Last Updated
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