Corn silk crude polysaccharide exerts anti-pancreatic cancer activity by blocking the EGFR/PI3K/AKT/CREB signaling pathway

2020 ◽  
Vol 11 (8) ◽  
pp. 6961-6970
Author(s):  
Hong Tao ◽  
Xia Chen ◽  
Zhenyun Du ◽  
Kan Ding

S1, a crude polysaccharide from corn silk, may significantly inhibit pancreatic cancer cell proliferation in vitro and in vivo. It can induce apoptosis, arrest the cell cycle in S phase and impede pancreatic cancer cell migration and invasion.

Oncotarget ◽  
2018 ◽  
Vol 9 (47) ◽  
pp. 28434-28444 ◽  
Author(s):  
Shuhei Shinoda ◽  
Seiji Kaino ◽  
Shogo Amano ◽  
Hirofumi Harima ◽  
Toshihiko Matsumoto ◽  
...  

2020 ◽  
Vol 7 ◽  
Author(s):  
Yong Zeng ◽  
Min Zou ◽  
Yan Liu ◽  
Keting Que ◽  
Yunbing Wang ◽  
...  

Keratin 17 (K17), a member of type I acidic epithelial keratin family, has been reported to be upregulated in many malignant tumors and to be involved in promoting the development of tumors. However, the precise role of K17 in progression of pancreatic cancer is still unknown. In this study, we found that K17 expression was highly expressed in pancreatic cancer tissues and cell lines and that upregulated expression was associated with the pathological grade and poor prognosis. K17 expression served as an independent predictor of pancreatic cancer survival. Meanwhile, we showed that knocking down K17 induced pancreatic cancer cell proliferation, colony formation and tumor growth in xenografts in mice. However, K17 upregulation inhibited pancreatic cancer cell proliferation and colony formation. Further mechanistic study revealed that K17 knockdown promoted cell cycle progression by upregulating CyclinD1 expression and repressed cell apoptosis. However, K17 upregulation suppressed cell cycle progression by decreasing CyclinD1 expression, and induced apoptosis by increasing the levels of cleaved Caspase3. In addition, K17 knockdown promoted pancreatic cancer cell migration and invasion, but K17 upregulation suppressed cell migration and invasion. Moreover, knocking down K17 promoted epithelial-mesenchymal transition (EMT) in pancreatic cancer cell by inhibiting E-cadherin expression and inducing Vimentin expression, and the effects of K17 upregulation were opposite to that of K17downregulation. Taken together, our findings suggest that K17 functions as a potential tumor suppressor, even though it is upregulated in pancreatic cancer.


2020 ◽  
Vol 18 (5) ◽  
pp. 345-355
Author(s):  
Xue-Ying LI ◽  
Homng TAO ◽  
Can JIN ◽  
Zhen-Yun DU ◽  
Wen-Feng LIAO ◽  
...  

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