Efficacy and Safety of HN2301 in Refractory Myasthenia Gravis(MG)

NCT ID: NCT06965309

Last Updated: 2025-07-01

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 9 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-06-30
• Study Completion Date: 2026-12-30

Brief Summary

This is an investigator-initiated trial designed to evaluate the safety, and efficacy of HN2301 in refractory myasthenia gravis

Detailed Description

This study is a prospective exploratory clinical trial in subjects with refractory myasthenia gravis. The objective is to evaluate the safety, initial efficacy of HN2301injection in refractory myasthenia gravis.

Conditions

Refractory Myasthenia Gravis

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

HN2301 treatment group

Group Type: EXPERIMENTAL

HN2301 injection

Intervention Type: DRUG

Description: Three dose groups were set up, starting from the low dose group and climbing to explore the safe and effective dose.

Interventions

HN2301 injection

Description: Three dose groups were set up, starting from the low dose group and climbing to explore the safe and effective dose.

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• Age: 18-80 years, no gender restriction;
• Confirmed diagnosis of generalized myasthenia gravis (MG) with positive AchR or MuSK antibodies, meeting at least one of the following conditions:

(1) Repetitive nerve stimulation suggesting neuromuscular transmission defect; (2) Positive response to neostigmine test; (3) Clinically judged improvement of --MG symptoms after oral cholinesterase inhibitor therapy;

• Clinical classification of MG according to MGFA types IIa-IVb (including IIa, IIb, IIIa, IIIb, IVa, IVb);
• Baseline MG-ADL (Myasthenia Gravis Activities of Daily Living) score ≥6, with ocular-related score <50%;
• Poor response and/or lack of effective treatment under standard therapies, defined as no improvement or worsening of symptoms despite stable treatment with corticosteroids, immunosuppressants (e.g., azathioprine, mycophenolate mofetil, tacrolimus, cyclosporin A, cyclophosphamide), or rituximab;
• Expected survival time greater than 12 weeks;
• Adequate bone marrow, coagulation, cardiopulmonary, liver, and renal function；Bone marrow function: ANC ≥1.5×10⁹/L, ALC ≥0.8×10⁹/L, Hb ≥80g/L; transfusions or growth factors must not be used within 7 days prior to screening to meet these criteria.Coagulation function: INR or APTT ≤1.5×ULN.
• Cardiac function: left ventricular ejection fraction (LVEF) ≥40% assessed by echocardiogram (ECHO).
• Pulmonary function: CTCAE grade ≤1 dyspnea and room air SpO₂ ≥92% (measured by pulse oximetry).
• Liver function: ALT and AST ≤2.5×ULN; total bilirubin <2.0 mg/dL (or <3.0 mg/dL for subjects with Gilbert's syndrome).
• Renal function: calculated creatinine clearance (Cockcroft-Gault) ≥50 mL/min without hydration assistance.

Exclusion Criteria

• Subjects positive for hepatitis B surface antigen (HBsAg) and/or hepatitis B core antibody (HBcAb) with detectable or quantifiable HBV DNA, positive for hepatitis C antibody (HCV Ab) with detectable or quantifiable HCV RNA, positive for HIV antibody, positive CMV DNA, or CMV DNA above the upper limit of detection; positive for syphilis antigen or antibody;
• Presence of other uncontrolled active infections;
• History of major organ transplantation (e.g., heart, lung, liver, kidney) or bone marrow/hematopoietic stem cell transplantation;
• Pregnant or breastfeeding women;
• Receipt of any mRNA-LNP products or other LNP-based drugs within the past two years;
• History of any of the following cardiovascular conditions within 6 months prior to screening: New York Heart Association (NYHA) Class III or IV heart failure, myocardial infarction, unstable angina, uncontrolled or symptomatic atrial arrhythmias, any ventricular arrhythmias, or other clinically significant cardiac disease;
• History of ≥Grade 2 bleeding events within 30 days prior to screening, or requiring long-term continuous anticoagulation therapy (e.g., warfarin, low molecular weight heparin, Xa factor inhibitors);
• History of live vaccination within 30 days prior to screening;
• Severe central nervous system diseases or pathological changes, including but not limited to: cerebrovascular accident, aneurysm, epilepsy, seizures/convulsions, aphasia, stroke, severe brain injury, dementia, Parkinson's disease, cerebellar disorders, organic brain syndromes, or psychosis;
• History of asthma or severe allergies;
• Any condition that, in the investigator's opinion, may increase the patient's risk or interfere with study assessments.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Songjiang Hospital Affiliated to Shanghai Jiao Tong University School of Medicine

UNKNOWN

Sponsor Role: collaborator

Shenzhen MagicRNA Biotechnology Co., Ltd

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Shanghai General Hospital (Songjiang Branch) of Shanghai Jiao Tong University School of Medicine

Shanghai, , China

Site Status: RECRUITING

Countries

China

Central Contacts

Ailian Du, MD

Role: CONTACT

lotusdu@126.com

+86021-67721633

Ze Xiu Xiao, MD

Role: CONTACT

xiaozexiu@magicrna.com

+86075527109036

Facility Contacts

Ailian Du, MD

Role: primary

lotusdu@126.com

021-677721633

Ze Xiu Xiao, MD

Role: backup

xiaozexiu@magicrna.com

Other Identifiers

HN2301-002

Identifier Type: -

Identifier Source: org_study_id