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2015 ; 58
(19
): 7734-48
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Hirsutinolide Series Inhibit Stat3 Activity, Alter GCN1, MAP1B, Hsp105, G6PD,
Vimentin, TrxR1, and Importin ?-2 Expression, and Induce Antitumor Effects
against Human Glioma
#MMPMID26331426
Miklossy G
; Youn UJ
; Yue P
; Zhang M
; Chen CH
; Hilliard TS
; Paladino D
; Li Y
; Choi J
; Sarkaria JN
; Kawakami JK
; Wongwiwatthananukit S
; Chen Y
; Sun D
; Chang LC
; Turkson J
J Med Chem
2015[Oct]; 58
(19
): 7734-48
PMID26331426
show ga
We report that hirsutinolide series, 6, 7, 10, 11, 20, and 22, and the
semisynthetic analogues, 30, 31, 33, and 36, inhibit constitutively active signal
transducer and activator of transcription (Stat)3 and malignant glioma phenotype.
A position 13 lipophilic ester group is required for activity. Molecular modeling
and nuclear magnetic resonance structural analyses reveal direct
hirsutinolide:Stat3 binding. One-hour treatment of cells with 6 and 22 also
upregulated importin subunit ?-2 levels and repressed translational activator
GCN1, microtubule-associated protein (MAP)1B, thioredoxin reductase (TrxR)1
cytoplasmic isoform 3, glucose-6-phosphate 1-dehydrogenase isoform a, Hsp105,
vimentin, and tumor necrosis factor ?-induced protein (TNAP)2 expression. Active
hirsutinolides inhibited anchorage-dependent and three-dimensional spheroid
growth, survival, and migration of human glioma lines and glioma patients'
tumor-derived xenograft cells harboring constitutively active Stat3. Oral gavage
delivery of 6 or 22 inhibited human glioma tumor growth in subcutaneous mouse
xenografts. The inhibition of Stat3 signaling represents part of the
hirsutinolide-mediated mechanisms to induce antitumor effects.