A Study of Imlifidase in Patients With Guillain-Barré Syndrome

  • End date
    Dec 31, 2022
  • participants needed
  • sponsor
    Hansa Biopharma AB
Updated on 26 April 2022


The study participants are patients which have been diagnosed with Guillain-Barré Syndrome (GBS) and are planned to receive treatment with intravenous immunoglobulin (IVIg). IVIg is a standard of care treatment for GBS patients. The patients in this study will be treated with the study medicine imlifidase on day 1, and with IVIg on days 3-7.

The purpose of this study is to investigate the safety and effectiveness of imlifidase in patients diagnosed with GBS.


This is an open-label, single arm, multi-centre, phase II study of imlifidase in combination with standard care IVIg in patients with GBS.

The study will recruit approximately 30 patients who are eligible for IVIg treatment based on current practice (i.e. GBS disability score >3 and within 10 days of onset of weakness). All patients will receive imlifidase (Day 1) prior to standard care IVIg.

Data from each patient enrolled in this study will be compared with a control group consisting of up to 4 subjects from the International Guillain-Barré Syndrome Outcome Study (IGOS) database (ClinicalTrials.gov identifier: NCT01582763) fulfilling a subset of the eligibility criteria in the current imlifidase GBS study protocol. Matching will be done on geographical locations, age, presence of diarrhoea, and severity of condition.

There is growing body of evidence suggesting that GBS is an antibody-mediated disorder. In addition to supportive care, IVIg and Plasma Exchange (PE) are the two main immunological treatment options aimed at attenuating the autoreactive humoral immune response. Imlifidase is an IgG degrading enzyme with strict specificity. The hypothesis is that reduction of pathological antibodies may result in aborted progression, quicker recovery and less severe disease.

Condition Guillain-Barré Syndrome (GBS)
Treatment Imlifidase
Clinical Study IdentifierNCT03943589
SponsorHansa Biopharma AB
Last Modified on26 April 2022


Yes No Not Sure

Inclusion Criteria

Signed Informed Consent obtained before any study-related procedures
Willingness and ability to comply with the protocol
Male or female aged ≥18 years at the time of screening
GBS diagnosed according to National Institute of Neurological Disorders and Stroke (NINDS) diagnostic criteria (Asbury et al. 1990)
Onset of weakness due to GBS is not more than 10 days prior to screening
Unable to walk unaided for >10 meters (grade ≥ 3 on GBS DS)
IVIg treatment being considered
Women of child-bearing potential willing or able to use at least one highly effective contraceptive method from the day of treatment until at least 6 months after the dose of imlifidase if not abstinent. In the context of this study, an effective method is defined as those which result in low failure rate (i.e. less than 1% per year) when used consistently and correctly
Men willing to use double-barrier contraception from the day of treatment until at least 2 months after the dose of imlifidase if not abstinent

Exclusion Criteria

Previous treatment with imlifidase
Previous IVIg treatment within 28 days prior to imlifidase treatment
Subjects who are being considered for, or already on, PE
Women of child-bearing potential willing or able to use at least one highly effective contraceptive method from the screening visit until at least 180 days following imlifidase dosing
Clinical evidence of a polyneuropathy of another cause e.g. diabetes mellitus (except mild sensory), alcoholism, vitamin deficiency, or porphyria
Breastfeeding or pregnancy
Known selective immunoglobulin A (IgA) deficiency
Hypersensitivity to IVIg or to any of the excipients
Immunosuppressive treatment (e.g. azathioprine, cyclosporine, mycophenolate mofetil, tacrolimus, sirolimus or > 20 mg prednisolone daily) during the last month
Subject known to have a severe concurrent disease, e.g. malignancy, severe cardiovascular disease and severe chronic obstructive pulmonary disease (COPD)
Any condition that in the opinion of the investigator could increase the subject's risk by participating in the study or confound the outcome of the study
Known mental incapacity or language barriers precluding adequate understanding of the Informed Consent information and the study activities
Subjects with clinical signs of ongoing infection
Subjects should not have received other investigational drugs within 5 half-lives prior to imlifidase dosing
Present or history of thrombotic thrombocytopenic purpura (TTP), or known familial history of TTP
Positive PCR test for SARS-CoV-2 virus infection
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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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