CARD9 promotes sex-biased colon tumors in the APCmin mouse model
2015
CARD9 functions in different
inflammationpathways to elicit reponses to microbial signals and is known to impact intestinal
inflammation. Examining the APCmin mouse model of intestinal tumorigenesis and using stringently controlled, sex- and age-matched pairs of CARD9-competent and -deficient mice, we have found that CARD9 has a restricted but strong effect on tumorigenesis in the
large intestine. We have found that CARD9 reduces viability specifically in males and promotes tumorigenesis specifically in
large intestineof these male mice. To our knowledge, this is the first gene ablation in APCmin mice solely affecting colon tumors in male subjects and, as such, may have significant clinical implications. Additional data suggest correlative disruption of plasma cytokine expression and immune infiltration of the tumors. We speculate that known sex-specific differences in human colorectal cancer (CRC) may involve
inflammation, particularly CARD9-dependent
inflammation.
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