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2015 ; 10
(8
): e0135844
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gab.com Text
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English Wikipedia
Combinational Therapy Enhances the Effects of Anti-IGF-1R mAb Figitumumab to
Target Small Cell Lung Cancer
#MMPMID26287334
Cao H
; Dong W
; Shen H
; Xu J
; Zhu L
; Liu Q
; Du J
PLoS One
2015[]; 10
(8
): e0135844
PMID26287334
show ga
BACKGROUND: Small cell lung cancer (SCLC) is a recalcitrant malignancy with
distinct biologic properties. Antibody targeting therapy has been actively
investigated as a new drug modality. METHODS: We tested the expression of IGF-1R
and calculated the survival in 61 SCLC patients. We also evaluated the anti-tumor
effects of anti-IGF-1R monoclonal antibody Figitumumab (CP) on SCLC, and tried
two drug combinations to improve CP therapy. RESULTS: Our clinical data suggested
that high IGF-1R expression was correlated with low SCLC patient survival. We
then demonstrated the effect of CP was likely through IGF-1R blockage and
down-regulation without IGF-1R auto-phosphorylation and PI3K/AKT activation.
However, we observed elevated MEK/ERK activation upon CP treatment in SCLC cells,
and this MEK/ERK activation was enhanced by ß-arrestin1 knockdown while
attenuated by ß-arrestin2 knockdown. We found both MEK/ERK inhibitor and
metformin could enhance CP treatment in SCLC cells. We further illustrated the
additive effect of metformin was likely through promoting further IGF-1R
down-regulation. CONCLUSION: Our results highlighted the potential of anti-IGF-1R
therapy and the adjuvant therapy strategy with either MEK/ERK inhibitor or
metformin to target SCLC, warranting further studies.
|Adult
[MESH]
|Aged
[MESH]
|Antibodies, Monoclonal/*therapeutic use
[MESH]
|Arrestins/metabolism
[MESH]
|Cell Line, Tumor
[MESH]
|Combined Modality Therapy/methods
[MESH]
|Down-Regulation/drug effects
[MESH]
|Female
[MESH]
|Humans
[MESH]
|Lung Neoplasms/*drug therapy/metabolism
[MESH]
|MAP Kinase Signaling System/drug effects
[MESH]
|Male
[MESH]
|Metformin/therapeutic use
[MESH]
|Middle Aged
[MESH]
|Phosphatidylinositol 3-Kinases/metabolism
[MESH]
|Phosphorylation/drug effects
[MESH]
|Protein Kinase Inhibitors/therapeutic use
[MESH]
|Proto-Oncogene Proteins c-akt/metabolism
[MESH]
|Receptor, IGF Type 1/*immunology/metabolism
[MESH]