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2015 ; 9
(5
): 2283-2288
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Anti-proliferative action of IL-6R-targeted antibody tocilizumab for non-small
cell lung cancer cells
#MMPMID26137057
Kim NH
; Kim SK
; Kim DS
; Zhang D
; Park JA
; Yi H
; Kim JS
; Shin HC
Oncol Lett
2015[May]; 9
(5
): 2283-2288
PMID26137057
show ga
In the present study we analyzed the anti-proliferative effect of tocilizumab, a
humanized recombinant monoclonal interleukin 6 receptor (IL-6R) antibody, against
non-small cell lung cancer (NSCLC) cells, including A549, H460, H358 and H1299
cells. The cell cycle distribution of NSCLCs was analyzed using
fluorescence-activated cell sorting and gene expression using quantitative
polymerase chain reaction. Cell lysates treated with tocilizumab were
immunoblotted with antibodies against signal transducer and activator of
transcription 3 (STAT3), phospho-STAT3, extracellular-signal-regulated kinases
(ERK), phospho-ERK, nuclear factor ?B (NF?B) and phospho-NF?B. Significant growth
inhibition of NSCLC cells was observed following treatment with tocilizumab.
Proliferation was significantly decreased by approximately 10-40% in A549, H460,
H1299 and H358 cells, with an inhibition rate that was comparable with that of
the typical anticancer drugs methotrexate and 5-fluorouracil. NSCLC cell
populations were accumulated in the sub-G1 phase by treatment with tocilizumab.
Western blot analyses revealed a possible activation of the NF?B pathway by
tocilizumab. Overall, these data indicate that tocilizumab has anticancer potency
via apoptosis induction as an agonistic IL-6R regulator. Therefore, we suggest
that this anti-IL-6R antibody may be utilized as a new targeting molecule for
NSCLC therapies.