Abstract | BACKGROUND:
AZD1480 is an ATP competitive inhibitor of Janus kinases 1 and 2 (JAK1, 2) that has been shown to inhibit the growth of solid tumor models. This agent was selected for testing the putative role of JAK/STAT signaling in the standard PPTP solid tumor models. PROCEDURES:
AZD1480 was tested against the PPTP in vitro cell line panel at concentrations from 1.0 nM to 10 μM and against the PPTP in vivo solid tumor xenograft panels at (60 mg/kg once daily ( SID) × 5) for three consecutive weeks. Additional studies evaluated 5 to 20 mg/kg BID × 5 with SID dosing at 7-30 mg/kg at weekends for three consecutive weeks. RESULTS: In vitro the median relative IC50 (rIC50 ) for the PPTP cell lines was 1.5 µM, with a range from 0.3 µM to 5.9 µM. The two cell lines with rIC50 values of 0.3 µM both had ALK activating genomic alterations. AZD1480 demonstrated statistically significant differences (P < 0.05) in EFS distribution compared to control in 89% of the solid tumor xenografts. AZD1480 induced intermediate (EFS T/C > 2) or high-level growth inhibition in 15 of 30 (50%) solid tumor xenografts. Tumor regressions were observed in three of six Wilms tumor models at doses that induced inhibition of Stat3(Y705) phosphorylation. CONCLUSIONS:
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Authors | Peter J Houghton, Raushan T Kurmasheva, Dmitry Lyalin, John M Maris, E Anders Kolb, Richard Gorlick, C Patrick Reynolds, Min H Kang, Stephen T Keir, Jianrong Wu, Malcolm A Smith |
Journal | Pediatric blood & cancer
(Pediatr Blood Cancer)
Vol. 61
Issue 11
Pg. 1972-9
(Nov 2014)
ISSN: 1545-5017 [Electronic] United States |
PMID | 25131802
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Copyright | © 2014 Wiley Periodicals, Inc. |
Chemical References |
- AZD 1480
- Pyrazoles
- Pyrimidines
- Janus Kinase 1
- Janus Kinase 2
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Topics |
- Animals
- Cell Line, Tumor
- Female
- Humans
- Janus Kinase 1
(antagonists & inhibitors)
- Janus Kinase 2
(antagonists & inhibitors)
- Mice
- Neoplasms
(drug therapy, mortality, pathology)
- Pyrazoles
(pharmacology)
- Pyrimidines
(pharmacology)
- Xenograft Model Antitumor Assays
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