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2015 ; 5
(ä): 10665
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Tumor-specific Th2 responses inhibit growth of CT26 colon-cancer cells in mice
via converting intratumor regulatory T cells to Th9 cells
#MMPMID26035423
Liu JQ
; Li XY
; Yu HQ
; Yang G
; Liu ZQ
; Geng XR
; Wang S
; Mo LH
; Zeng L
; Zhao M
; Fu YT
; Sun HZ
; Liu ZG
; Yang PC
Sci Rep
2015[Jun]; 5
(ä): 10665
PMID26035423
show ga
The abnormality of immune regulation plays a critical role in the pathogenesis of
cancer; the underlying mechanism has not been fully understood yet. This study
aims to investigate the role of cancer specific T helper (Th)2 response in the
inhibition of colon cancer (Cca) cell growth. The results showed that with Cca
cell (CT26 cell) extracts as an antigen, the Cca-extract specific Th2 response
was induced in the Cca-bearing mice. The Cca mass size was significantly reduced,
or radically disappeared (5 out of 10; or 50%); the survival rate was markedly
improved in mice immunized with Cca-extract, but not in those immunized with
another tumor cell (U87 cell) extracts or to bovine serum albumin. The
immunization with Cca-extract also induced Cca cell apoptosis and converted the
intra-Cca Tregs to T helper (Th) 9 cells. In conclusion, Cca-specific Th2
responses inhibit Cca growth in a mouse model via inducing Cca cell apoptosis and
converting intra-Cca Tregs to Th9 cells.