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2016 ; 9
(ä): 39-50
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Generation and characterization of ixekizumab, a humanized monoclonal antibody
that neutralizes interleukin-17A
#MMPMID27143947
Liu L
; Lu J
; Allan BW
; Tang Y
; Tetreault J
; Chow CK
; Barmettler B
; Nelson J
; Bina H
; Huang L
; Wroblewski VJ
; Kikly K
J Inflamm Res
2016[]; 9
(ä): 39-50
PMID27143947
show ga
Interleukin (IL)-17A exists as a homodimer (A/A) or as a heterodimer (A/F) with
IL-17F. IL-17A is expressed by a subset of T-cells, called Th17 cells, at
inflammatory sites. Most cell types can respond to the local production of IL-17A
because of the near ubiquitous expression of IL-17A receptors, IL-17RA and
IL-17RC. IL-17A stimulates the release of cytokines and chemokines designed to
recruit and activate both neutrophils and memory T-cells to the site of injury or
inflammation and maintain a proinflammatory state. IL-17A-producing pathogenic
T-cells contribute to the pathogenesis of autoimmune diseases, including
psoriasis, psoriatic arthritis, rheumatoid arthritis, and ankylosing spondylitis.
This study describes the generation and characterization of ixekizumab, a
humanized IgG4 variant IL-17A-neutralizing antibody. Ixekizumab binds human and
cynomolgus monkey IL-17A with high affinity and binds rabbit IL-17A weakly but
does not bind to rodent IL-17A or other IL-17 family members. Ixekizumab
effectively inhibits the interaction between IL-17A and its receptor in binding
assays and potently blocks IL-17A-induced GRO or KC secretion in cell-based
assays. In an in vivo mouse pharmcodynamic model, ixekizumab blocks human
IL-17A-induced mouse KC secretion. These data provide a comprehensive preclinical
characterization of ixekizumab, for which the efficacy and safety have been
demonstrated in human clinical trials in psoriasis and psoriatic arthritis.