The Renaissance of Complement Therapeutics
Overview
Affiliations
The increasing number of clinical conditions that involve a pathological contribution from the complement system - many of which affect the kidneys - has spurred a regained interest in therapeutic options to modulate this host defence pathway. Molecular insight, technological advances, and the first decade of clinical experience with the complement-specific drug eculizumab, have contributed to a growing confidence in therapeutic complement inhibition. More than 20 candidate drugs that target various stages of the complement cascade are currently being evaluated in clinical trials, and additional agents are in preclinical development. Such diversity is clearly needed in view of the complex and distinct involvement of complement in a wide range of clinical conditions, including rare kidney disorders, transplant rejection and haemodialysis-induced inflammation. The existing drugs cannot be applied to all complement-driven diseases, and each indication has to be assessed individually. Alongside considerations concerning optimal points of intervention and economic factors, patient stratification will become essential to identify the best complement-specific therapy for each individual patient. This Review provides an overview of the therapeutic concepts, targets and candidate drugs, summarizes insights from clinical trials, and reflects on existing challenges for the development of complement therapeutics for kidney diseases and beyond.
Unravelling the complexity of CARPA: a review of emerging advancements in therapeutic strategies.
Saxena S, Sharma S, Kumar G, Thakur S Arch Dermatol Res. 2025; 317(1):439.
PMID: 39971823 DOI: 10.1007/s00403-025-03971-z.
Pegcetacoplan for the Treatment of Paediatric C3 Glomerulonephritis: A Case Report.
Guzman G, Perry K Nephrology (Carlton). 2025; 30(2):e70001.
PMID: 39871447 PMC: 11772912. DOI: 10.1111/nep.70001.
Troise D, Allegra C, Cirolla L, Mercuri S, Infante B, Castellano G Antioxidants (Basel). 2025; 14(1).
PMID: 39857400 PMC: 11761266. DOI: 10.3390/antiox14010066.
Cryo-EM analysis of complement C3 reveals a reversible major opening of the macroglobulin ring.
Gadeberg T, Jorgensen M, Olesen H, Lorentzen J, Harwood S, Almeida A Nat Struct Mol Biol. 2025; .
PMID: 39849196 DOI: 10.1038/s41594-024-01467-4.
Complement-targeted therapeutics: Are we there yet, or just getting started?.
Ricklin D Eur J Immunol. 2024; 54(12):e2350816.
PMID: 39263829 PMC: 11628912. DOI: 10.1002/eji.202350816.