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2017 ; 7
(1
): 10735
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Immunoregulation by IL-7R-targeting antibody-drug conjugates: overcoming
steroid-resistance in cancer and autoimmune disease
#MMPMID28878234
Yasunaga M
; Manabe S
; Matsumura Y
Sci Rep
2017[Sep]; 7
(1
): 10735
PMID28878234
show ga
Steroid-resistance is a common complication in the treatment of malignancies and
autoimmune diseases. IL-7/IL-7R signaling, which regulates lymphocyte growth and
survival, has been implicated in the development of malignancies and autoimmune
diseases. However, the biological significance of IL-7/IL-7R signaling in steroid
treatment is poorly understood. Here, we identified a novel relationship between
IL-7R signaling and steroid-resistance, and showed that an anti-IL-7R antibody
conjugated with SN-38 (A7R-ADC-SN-38) has strong anti-tumor effects against both
parental and steroid-resistant malignant cells. Furthermore, inflammation in the
mouse autoimmune arthritis model was suppressed to greater extent by A7R-ADC
conjugated to MMAE than by A7R-ADC-SN-38. Given that an increased proportion of
IL-7R-positive cells is a common mechanism underlying the pathogenesis of
autoimmunity, we found that specific depletion of this cell population abrogated
the progression of disease. This suggests that the cytotoxicity and
immunosuppressive capacity of A7R-ADC could be modulated to treat specific
malignancies or autoimmune diseases through the introduction of different
payloads, and represents a novel alternative to steroid therapy.