Abstract
The TH9 subset of helper T cells was initially shown to contribute to the induction of autoimmune and allergic diseases, but subsequent evidence has suggested that these cells also exert antitumor activities. However, the molecular events that account for their effector properties are elusive. Here we found that the transcription factor IRF1 enhanced the effector function of TH9 cells and dictated their anticancer properties. Under TH9-skewing conditions, interleukin 1β (IL-1β) induced phosphorylation of the transcription factor STAT1 and subsequent expression of IRF1, which bound to the promoters of Il9 and Il21 and enhanced secretion of the cytokines IL-9 and IL-21 from TH9 cells. Furthermore, IL-1β-induced TH9 cells exerted potent anticancer functions in an IRF1- and IL-21-dependent manner. Our findings thus identify IRF1 as a target for controlling the function of TH9 cells.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
3T3 Cells
-
Animals
-
Base Sequence
-
Cell Line
-
Female
-
Green Fluorescent Proteins / biosynthesis
-
Green Fluorescent Proteins / genetics
-
Interferon Regulatory Factor-1 / biosynthesis
-
Interferon Regulatory Factor-1 / immunology*
-
Interferon-gamma / genetics
-
Interferon-gamma / immunology
-
Interleukin-10 / antagonists & inhibitors
-
Interleukin-10 / immunology
-
Interleukin-9 / genetics
-
Interleukin-9 / immunology
-
Interleukin-9 / metabolism
-
Interleukins / genetics
-
Interleukins / immunology*
-
Interleukins / metabolism
-
Melanoma, Experimental / immunology*
-
Mice
-
Mice, Inbred C57BL
-
Mice, Knockout
-
Ovalbumin / immunology
-
Phosphorylation / immunology
-
Proto-Oncogene Proteins c-fyn / antagonists & inhibitors
-
Proto-Oncogene Proteins c-fyn / genetics
-
RNA Interference
-
RNA, Small Interfering
-
STAT1 Transcription Factor / immunology
-
Sequence Analysis, RNA
-
T-Lymphocytes, Helper-Inducer / immunology*
-
T-Lymphocytes, Helper-Inducer / metabolism
Substances
-
IL10 protein, mouse
-
Interferon Regulatory Factor-1
-
Interleukin-9
-
Interleukins
-
Irf1 protein, mouse
-
RNA, Small Interfering
-
STAT1 Transcription Factor
-
Stat1 protein, mouse
-
Interleukin-10
-
Green Fluorescent Proteins
-
Interferon-gamma
-
Ovalbumin
-
Fyn protein, mouse
-
Proto-Oncogene Proteins c-fyn
-
interleukin-21