Cited by 39Virus-based gene therapy researchComplement system in diseasesRNA Interference and Gene Delivery

Complement System Response to Adeno-Associated Virus Vector Gene Therapy

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Kropf, Elizabeth, Markusic, David M., Majowicz, Anna, Mingozzi, Federico, Kuranda, Klaudia·2024·Human Gene Therapy

Abstract

Adeno-associated virus (AAV) vectors represent a novel tool for the delivery of genetic therapeutics and enable the treatment of a wide range of diseases. Success of this new modality is challenged, however, by cases of immune-related toxicities that complicate the clinical management of patients and potentially limit the therapeutic efficacy of AAV gene therapy. While significant progress has been made to manage immune-related liver enzyme elevations following systemic AAV delivery in humans, recent clinical trials utilizing high vector doses have highlighted a new challenge to AAV gene transfer—activation of the complement system. While current in vitro models implicate AAV-specific antibodies in the initiation of the classical complement pathway, evidence from in vivo pre-clinical and clinical studies suggests that the alternative pathway also contributes to complement activation. A convergence of AAV-specific, environmental, and patient-specific factors shaping complement responses likely contributes to differential outcomes seen in clinical trials, from priming of the adaptive immune system to serious adverse events such as hepatotoxicity and thrombotic microangiopathy. Research focused on the interplay of patient-specific and AAV-related factors driving complement activation is needed to understand and identify critical components in the complement cascade to target and devise strategies to mitigate vector-related immune responses.

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Authors
Kropf, E., Markusic, D. M., Majowicz, A., Mingozzi, F., & Kuranda, K.
Affiliations
Spark Therapeutics (United States) (US)
Corresponding author
Kuranda, Klaudia
Venue
Human Gene Therapy
Published
2024-07
Volume
35
Issue
13-14
Pages
425-438
ISSN
  • 1043-0342 (ISSN-L)
  • 1557-7422
OpenAlex
W4391103529
Cited by
39
References
57
Citations by year
2026: 21 · 2025: 14 · 2024: 4
FWCI
10.36
Type
journal article
Language
en
Open access
Locations
  • Human Gene Therapy (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
adeno-associated virus vectors, gene therapy, complement activation, alternative complement pathway, classical complement pathway, immune-related toxicity, hepatotoxicity, thrombotic microangiopathy, vector dose, immune response to gene therapy
MeSH terms
Dependovirus, Animals, Complement System Proteins, Complement Activation, Genetic Vectors, Humans, Genetic Therapy, Gene Transfer Techniques

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