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Reduced IL ‐6 levels and tumor‐associated phospho‐ STAT 3 are associated with reduced tumor development in a mouse model of lung cancer chemoprevention with myo‐ inositol
Author(s) -
Unver Nese,
Delgado Oliver,
Zeleke Kirubel,
Cumpian Amber,
Tang Ximing,
Caetano Mauricio S.,
Wang Hong,
Katayama Hiroyuki,
Yu Hua,
Szabo Eva,
Wistuba Ignacio I.,
Moghaddam Seyed Javad,
Hanash Samir M.,
Ostrin Edwin J.
Publication year - 2017
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.31152
Subject(s) - autocrine signalling , carcinogenesis , cancer research , kras , biology , pi3k/akt/mtor pathway , inositol , cancer , cytokine , signal transduction , lewis lung carcinoma , immunology , medicine , receptor , colorectal cancer , metastasis , microbiology and biotechnology , biochemistry
Several promising chemopreventive agents have for lung cancer emerged in preclinical models and in retrospective trials. These agents have been shown to modulate pathways altered in carcinogenesis and reduce markers of carcinogenesis in animal and cell culture models. Cancer‐prone transgenic mice with oncogenic Kras expressed in the airway epithelium ( Ccsp Cre/+ ; Kras LSL‐G12D/+ ) were raised on diets compounded with myo ‐inositol. These animals form lung premalignant lesions in a stereotypical fashion over the ten weeks following weaning. Mice raised on myo ‐inositol containing diets showed potent reduction in the number, size, and stage of lesions as compared to those raised on control diets. myo ‐inositol has previously been reported to inhibit phosphoinositide 3‐kinase (PI3K) signaling. However, in mice raised on myo ‐inositol, total PI3K signaling was largely unaffected. Proteomic and cytokine analyses revealed large reduction in IL‐6 related pathways, including STAT3 phosphorylation. This effect was not due to direct inhibition of IL‐6 production and autocrine signaling within the tumor cell, but rather through alteration in macrophage recruitment and in phenotype switching, with an increase in antitumoral M1 macrophages.