Evaluate the Efficacy and Safety of HBM9161(HL161)Subcutaneous Injection in Patients With Generalized MG Patients

NCT05039190 | Completed Phase 3

• 1 other identifier: 9161.3 ph3
• Study Type: interventional
• Target: 132
• Locations: 1 country
• Sites: 1

Brief Summary

Primary study objective: To confirm the efficacy of HBM9161 subcutaneous injection for the treatment of gMG in Chinese patients

Conditions

Myasthenia Gravis

Keywords

MG

Outcome Measures

Primary Outcomes (1)

• In the first treatment cycle, percentage of patients with sustained improvement based on Myasthenia Gravis Activities of Daily Living Scale (MG-ADL), among serum AChR-Ab- or MuSK-Ab-positive subjects

  Definition of sustained improvement based on MG-ADL: during the treatment cycle (5-week treatment period plus 4-week observation period), a reduction of ≥ 3 points from the baseline of MG-ADL score for 4 consecutive weekly MG-ADL assessments

  baseline to Day 64

Secondary Outcomes (6)

• In the first treatment cycle, percentage of patients with sustained improvement based on MG-ADL, among all study subjects, regardless of , regardless of AChR-Ab and MuSK-Ab serologic status

  Baseline to Day 64

• In the first treatment cycle, percentage of subjects with sustained improvement based on Quantitative Myasthenia Gravis Scale (QMG), among serum AChR-Ab- or MuSK-Ab-positive subjects [ Time Frame: baseline to Day 64 ]

  Baseline to Day 64

• During the 24-study period, the proportion of weekly MG-ADL assessments that are improved ≥ 3 points from baseline among serum AChR-Ab- or MuSK-Ab-positive subjects

  baseline to Day 64

• In the first treatment cycle, percentage of serum AChR-Ab- or MuSK-Ab-positive subjects who meet the minimal symptom manifestation (MSE, defined as MG-ADL being 0 or 1) criterion at any visit

  baseline to Day 64

• Within the first 2 weeks of the first treatment cycle, percentage of AChR-Ab- or MuSK-Ab-positive subjects whose MG-ADL improved by ≥3 points from baseline

  baseline to Day 64

Study Arms (2)

Experimental: HBM9161 (680mg )

ACTIVE COMPARATOR

HBM9161 680mg; First treatment period: Subcutaneous injection, QW for 6 doses; Second treatment period: Subcutaneous injection, QW for 6 doses

Drug: HBM9161 Injection (680mg)

Placebo Comparator: Placebo

PLACEBO COMPARATOR

Placebo; First treatment period: Subcutaneous injection, QW for 6 doses; Second treatment period: Subcutaneous injection, QW for 6 doses

Drug: Placebo

Interventions

HBM9161 Injection (680mg) DRUG

HBM9161 Injection

Experimental: HBM9161 (680mg )

Placebo DRUG

Placebo Injection

Placebo Comparator: Placebo

Eligibility Criteria

• Age: 18 Years - 99 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Signed written informed consent form (ICF).
• Male or female ≥ 18 years of age at the screening visit.
• Female subjects must meet the following conditions to participate in this study:
• Not of childbearing potential (ie, physiologically incapable of becoming pregnant, including women who have been postmenopausal for 2 or more years);
• Of potential childbearing potential, have a negative serum pregnancy test result at the screening visit, and agree to adhere to one of the following acceptable effective methods of contraception (ie, per approved product label insert and physician instructions) consistently and correctly during the study, until 60 days after the last dose:
• i. Total abstinence (based on subject preference and previous lifestyle); or ii. Implantation of a levonorgestrel implant at least 1 month prior to study drug administration, but no longer than 3 years; or iii. Injection of a progestogen at least 1 month prior to study drug administration; or iv. A cycle of oral contraceptives (combined contraceptives or progestin-only) for at least 1 month prior to study drug administration; or v. Double contraception: condom or cervical cap (diaphragm or cervical cap) plus spermicide (foam/gel/cream/suppository); or vi. An intrauterine device, implanted by a qualified physician; or vii. Estrogen vaginal ring; or viii. Contraceptive patch.
• Male subjects must use effective contraceptive methods or have their heterosexual partners use effective contraceptive methods during their participation in this clinical trial.
• Meets MGFA myasthenia gravis clinical classification IIa-IVa (includes types IIa, IIb, IIIa, IIIb, and IVa) at the screening visit and at the baseline visit.
• Screening and baseline MG-ADL score ≥ 5, and \< 50% of them is from ocular muscle.At least one stable background MG treatment at randomization.Positive or negative AchR-Ab/MUSK-Ab at the screening visit and meets at least 1 of the following 3 criteria:
• Repeated electrical stimulation indicates neuromuscular junction transmission disorder (including medical history record);
• Positive Tensilon test or neostigmine test (including medical history record);
• The patient's MG symptoms improve after treatment with oral cholinesterase inhibitors at the judge of the physician.
• Results from clinical laboratory tests at screening must be acceptable to the investigator.

You may not qualify if:

• Has a serious illness or condition other than myasthenia gravis that, in the judgment of the investigator, would put the subject at risk because of participation in the study, or that would affect the results of the study and the subject's ability to participate in the study.
• Females who are pregnant or lactating or planning to become pregnant during the study period, or females of childbearing potential who are not using an effective method of contraception.
• Subjects with severe myasthenia gravis (such as Type IVb or V) who are judged by the investigator to be inappropriate for this study (e.g., expected to require artificial assisted ventilation during the study).
• Thymectomy performed \< 12 months prior to screening.
• Presence of other autoimmune diseases (such as uncontrolled thyroid disease, severe rheumatoid arthritis, etc.) that may affect the efficacy assessment of the study drug or affect participation in this study.
• Has received a vaccine injection (including the COVID-19 vaccine) 4 weeks prior to the Screening Visit or is scheduled to receive a vaccine injection during the study.
• Any active infection at the Screening Visit or serious infection requiring treatment with intravenous anti-infective drugs or hospitalization within 8 weeks before the Screening Visit.
• Current or past 1 year alcohol or drug dependence/abuse, except nicotine and coffee.
• Subjects who are allergic to the trial drug or its components; or history of clinically significant allergic disease (including drug allergies, anaphylaxis) that, in the opinion of the investigator, affects the subject's participation in this study.

Sponsors & Collaborators

• Harbour BioMed (Guangzhou) Co. Ltd.: lead

Study Sites (1)

Huashan Hospital, Fudan University

Shanghai, Shanghai Municipality, China

Location

Related Publications (1)

• Yan C, Yue Y, Guan Y, Bu B, Ke Q, Duan R, Deng H, Xue Q, Jiang H, Xiao F, Yang H, Chang T, Zou Z, Li H, Tan S, Xiao H, Zhou H, Zhang H, Meng Q, Li W, Li W, Guo J, Zhang Y, Li Z, Tu J, Shi J, Li W, Lee M, Chen Y, Tao X, Zhao S, Li P, Zhao C; Batoclimab Study Team. Batoclimab vs Placebo for Generalized Myasthenia Gravis: A Randomized Clinical Trial. JAMA Neurol. 2024 Mar 4;81(4):336-45. doi: 10.1001/jamaneurol.2024.0044. Online ahead of print.

  PMID: 38436998 DERIVED

MeSH Terms

Conditions

Myasthenia Gravis

Interventions

HBM9161

Condition Hierarchy (Ancestors)

Paraneoplastic Syndromes, Nervous System; Nervous System Neoplasms; Neoplasms by Site; Neoplasms; Paraneoplastic Syndromes; Autoimmune Diseases of the Nervous System; Nervous System Diseases; Neurodegenerative Diseases; Neuromuscular Junction Diseases; Neuromuscular Diseases; Autoimmune Diseases; Immune System Diseases

Study Officials

• Chongbo Zhao

  Huashan Hospital

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: phase 3
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Model Details: To confirm the efficacy of HBM9161 subcutaneous injection for the treatment of gMG in Chinese patientsTreatment

Study Record Dates

• First Submitted: August 29, 2021
• First Posted: September 9, 2021
• Study Start: September 25, 2021
• Primary Completion: January 14, 2023
• Study Completion: January 14, 2023
• Last Updated: March 8, 2023

Record last verified: 2023-03

Locations

CN (1)