| RRC ID |
44703
|
| 著者 |
Mattoo AR, Pastan I, Fitzgerald D.
|
| タイトル |
Combination treatments with the PKC inhibitor, enzastaurin, enhance the cytotoxicity of the anti-mesothelin immunotoxin, SS1P.
|
| ジャーナル |
PLoS One
|
| Abstract |
Activated protein kinase C (PKC) contributes to tumor survival and proliferation, provoking the development of inhibitory agents as potential cancer therapeutics. Immunotoxins are antibody-based recombinant proteins that employ antibody fragments for cancer targeting and bacterial toxins as the cytotoxic agent. Pseudomonas exotoxin-based immunotoxins act via the ADP-ribosylation of EF2 leading to the enzymatic inhibition of protein synthesis. Combining PKC inhibitors with the immunotoxin SS1P, targeted to surface mesothelin, was undertaken to explore possible therapeutic strategies. Enzastaurin but not two other PKC inhibitors combined with SS1P to produce synergistic cell death via apoptosis. Mechanistic insights of the synergistic killing centered on the complete loss of the prosurvival Bcl2 protein, Mcl-1, the loss of AKT and the activation of caspase 3/7. Synergy was most evident when cells exhibited resistance to the immunotoxin alone. Further, because PKC inhibition by itself was not sufficient to enhance SS1P action, enzastaurin must target other kinases that are involved in the immunotoxin pathway.
|
| 巻・号 |
8(10)
|
| ページ |
e75576
|
| 公開日 |
2013-1-1
|
| DOI |
10.1371/journal.pone.0075576
|
| PII |
PONE-D-13-27494
|
| PMID |
24130723
|
| PMC |
PMC3794001
|
| MeSH |
Antibodies, Monoclonal / therapeutic use*
Apoptosis / drug effects
Blotting, Western
Cell Line, Tumor
Combined Modality Therapy
Drug Synergism
GPI-Linked Proteins / antagonists & inhibitors*
Humans
Indoles / therapeutic use*
Inhibitory Concentration 50
Mesothelin
Protein Kinase C beta / antagonists & inhibitors*
|
| IF |
2.74
|
| 引用数 |
19
|
|
WOS 分野
|
ONCOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
KLM-1(RCB2138) |
