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2014 ; 45
(4
): 1457-68
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ISO-66, a novel inhibitor of macrophage migration, shows efficacy in melanoma and
colon cancer models
#MMPMID25050663
Ioannou K
; Cheng KF
; Crichlow GV
; Birmpilis AI
; Lolis EJ
; Tsitsilonis OE
; Al-Abed Y
Int J Oncol
2014[Oct]; 45
(4
): 1457-68
PMID25050663
show ga
Macrophage migration inhibitory factor (MIF) is a pleiotropic pro-inflammatory
cytokine, which possesses a contributing role in cancer progression and
metastasis and, thus, is now considered a promising anticancer drug target. Many
MIF-inactivating strategies have proven successful in delaying cancer growth.
Here, we report on the synthesis of ISO-66, a novel, highly stable,
small-molecule MIF inhibitor, an analog of ISO-1 with improved characteristics.
The MIF:ISO-66 co-crystal structure demonstrated that ISO-66 ligates the
tautomerase active site of MIF, which has previously been shown to play an
important role in its biological functions. In vitro, ISO-66 enhanced specific
and non-specific anticancer immune responses, whereas prolonged administration of
ISO-66 in mice with established syngeneic melanoma or colon cancer was non-toxic
and resulted in a significant decrease in tumor burden. Subsequent ex vivo
analysis of mouse splenocytes revealed that the observed decrease in tumor growth
rates was likely mediated by the selective in vivo expansion of
antitumor-reactive effector cells induced by ISO-66. Compared to other
MIF-inactivating strategies employed in vivo, the anticancer activity of ISO-66
is demonstrated to be of equal or better efficacy. Our findings suggest that
targeting MIF, via highly specific and stable compounds, such as ISO-66, may be
effective for cancer treatment and stimulation of anticancer immune responses.
|Animals
[MESH]
|Antineoplastic Agents/chemical synthesis/chemistry/*therapeutic use
[MESH]