Cited by 108Renal Transplantation Outcomes and TreatmentsMonoclonal and Polyclonal Antibodies ResearchComplement system in diseases

Safety, immunogenicity, pharmacokinetics, and efficacy of degradation of anti-HLA antibodies by IdeS (imlifidase) in chronic kidney disease patients

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Lorant, Tomas, Bengtsson, Mats, Eich, Torsten, Eriksson, Britt-Marie, Winstedt, Lena, Järnum, Sofia, Stenberg, Yvonne, Robertson, Anna-Karin +7 more·2018·American Journal of Transplantation

Abstract

Safety, immunogenicity, pharmacokinetics, and efficacy of the IgG-degrading enzyme of Streptococcus pyogenes (IdeS [imlifidase]) were assessed in a single-center, open-label ascending-dose study in highly sensitized patients with chronic kidney disease. Eight patients with cytotoxic PRAs (median cytotoxic PRAs of 64%) at enrollment received 1 or 2 intravenous infusions of IdeS on consecutive days (0.12 mg/kg body weight ×2 [n = 3]; 0.25 mg/kg ×1 [n = 3], or 0.25 mg/kg ×2 [n = 2]). IgG degradation was observed in all subjects after IdeS treatment, with <1% plasma IgG remaining within 48 hours and remaining low up to 7 days. Mean fluorescence intensity values of HLA class I and II reactivity were substantially reduced in all patients, and C1q binding to anti-HLA was abolished. IdeS also cleaved the IgG-type B cell receptor on CD19 + memory B cells. Anti-IdeS antibodies developed 1 week after treatment, peaking at 2 weeks. A few hours after the second IdeS infusion, 1 patient received a deceased donor kidney offer. At enrollment, the patient had a positive serum crossmatch (HLA-B7), detected by complement-dependent cytotoxicity, flow cytometry, and multiplex bead assays. After IdeS infusion (0.12 mg/kg ×2) and when the HLA-incompatible donor (HLA-B7 + ) kidney was offered, the HLA antibody profile was negative. The kidney was transplanted successfully.

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  • Imlifidase is a IgG-degrading cysteine protease derived from Streptococcus pyogenes (IdeS), which specifically cleaves opsonizing IgG at the lower hinge region of the heavy chains, resulting in a F(ab')2 and a non-functioning dimeric Fc fragment.

    “Imlifidase (Idefirix, Hansa Biopharma) is a IgG-degrading cysteine protease derived from Streptococcus pyogenes (IdeS), which specifically cleaves opsonizing IgG at the lower hinge region of the heavy chains, resulting in a F(ab’)2 and a non-functioning dimeric Fc fragment (82).”

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Authors
Lorant, T., Bengtsson, M., Eich, T., Eriksson, B.-M., Winstedt, L., Järnum, S., Stenberg, Y., Robertson, A.-K., Mosén, K., Björck, L., Bäckman, L., Larsson, E., Wood, K., Tufveson, G., & Kjellman, C.
Affiliations
  • Uppsala University (SE)
  • Hansa Biopharma (Sweden) (SE)
  • Lund University (SE)
  • University of Oxford (GB)
Corresponding author
Kjellman, Christian
Venue
American Journal of Transplantation
Publisher
Elsevier BV
Published
2018-11
Volume
18
Issue
11
Pages
2752-2762
ISSN
1600-6135 (ISSN-L)
OpenAlex
W2789946756
Cited by
108
References
23
Citations by year
2026: 11 · 2025: 11 · 2024: 18 · 2023: 14 · 2022: 18 · 2021: 12 · 2020: 12 · 2019: 11 · 2018: 1
FWCI
7.69
Type
journal article
Language
en
Open access
Locations
  • American Journal of Transplantation (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Uppsala University Publications (Uppsala University) (submittedVersion, other-oa)
  • Lund University Publications (Lund University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Transplantation › Renal Transplantation Outcomes and Treatments
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
Keywords
ide, imlifidase, HLA antibodies, chronic kidney disease, HLA sensitization, IgG degradation, complement-dependent cytotoxicity, HLA crossmatch, kidney transplantation, immunogenicity, pharmacokinetics
MeSH terms
Adult, Aged, Bacterial Proteins, Desensitization, Immunologic, Female, Follow-Up Studies, Graft Rejection, Graft Survival, Histocompatibility, HLA Antigens, Humans, Immunoglobulin G, Infusions, Intravenous, Isoantibodies, Male, Middle Aged, Prognosis, Risk Factors, Streptococcus pyogenes, Complement C1q, Kidney Transplantation, Renal Insufficiency, Chronic

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