scholarly journals Mahanimbine Exerts Anticancer Effects on Human Pancreatic Cancer Cells by Triggering Cell Cycle Arrest, Apoptosis, and Modulation of AKT/Mammalian Target of Rapamycin (mTOR) and Signal Transducer and Activator of Transcription 3 (STAT3) Signalling Pathways

2018 ◽  
Vol 24 ◽  
pp. 6975-6983 ◽  
Author(s):  
Chenlin Pei ◽  
Qun He ◽  
Shuai Liang ◽  
Xuejun Gong
Tumor Biology ◽  
2017 ◽  
Vol 39 (3) ◽  
pp. 101042831769591 ◽  
Author(s):  
Wentao Zhou ◽  
Ning Ma ◽  
Hao Jiang ◽  
Yefei Rong ◽  
Yuezhen Deng ◽  
...  

Splicing factor 3b subunit 4, a critical component of pre-message RNA splicing complex, has been reported to play an important part in the tumorigenesis. However, the expression pattern and biological role of splicing factor 3b subunit 4 in pancreatic cancer have never been investigated. In this study, we found that both the messenger RNA ( p < 0.001) and protein level of splicing factor 3b subunit 4 were decreased significantly in pancreatic cancer specimens compared with their adjacent normal tissues. Overexpression of splicing factor 3b subunit 4 in pancreatic cancer cells inhibited cell growth and motility in vitro, while suppressing splicing factor 3b subunit 4 expression promoted the proliferation and migration of pancreatic cancer cells. In addition, splicing factor 3b subunit 4 was found to inhibit the activity of signal transducer and activator of transcription 3 signaling via downregulating the phosphorylation of signal transducer and activator of transcription 3 on a tyrosine residue at position 705. Taken together, these findings demonstrated that splicing factor 3b subunit 4 acted as a suppressive role in pancreatic cancer and indicated that restoring the function of splicing factor 3b subunit 4 might be a strategy for cancer therapy.


Pharmacology ◽  
2019 ◽  
Vol 103 (5-6) ◽  
pp. 250-256 ◽  
Author(s):  
Eri Usugi ◽  
Kenichiro Ishii ◽  
Yoshifumi Hirokawa ◽  
Kazuki Kanayama ◽  
Chise Matsuda ◽  
...  

Background: Pirfenidone (PFD), which is an antifibrotic agent used for treatment of idiopathic pulmonary fibrosis, induces G0/G1 cell cycle arrest in fibroblasts. We hypothesized that PFD-induced G0/G1 cell cycle arrest might be achieved in other types of cells, including cancer cells. Here we investigated the effects of PFD on the proliferation of pancreatic cancer cells (PCCs) in vitro. Method: Human skin fibroblasts ASF-4-1 cells and human prostate stromal cells (PrSC) were used as fibroblasts. PANC-1, MIA PaCa-2, and BxPC-3 cells were used as human PCCs. Cell cycle and apoptosis were analyzed using flow cytometer. Results: First, we confirmed that PFD suppressed cell proliferation of ASF-4-1 cells and PrSC and induced G0/G1 cell cycle arrest. Under these experimental conditions, PFD also suppressed cell proliferation and induced G0/G1 cell cycle arrest in all PCCs. In PFD-treated PCCs, expression of p21 was increased but that of CDK2 was not clearly decreased. Of note, PFD did not induce significant apoptosis among PCCs. Conclusions: These results demonstrated that the antifibrotic agent PFD might have antiproliferative effects on PCCs by inducing G0/G1 cell cycle arrest. This suggests that PFD may target not only fibroblasts but also PCCs in the tumor microenvironment of pancreatic cancer.


2018 ◽  
Vol 18 (6) ◽  
pp. 824-831 ◽  
Author(s):  
Sander Bekeschus ◽  
André Käding ◽  
Tim Schröder ◽  
Kristian Wende ◽  
Christine Hackbarth ◽  
...  

Background: Cold physical plasma has been suggested as a new anticancer tool recently. However, direct use of plasma is limited to visible tumors and in some clinical situations, is not feasible. This includes repetitive treatment of peritoneal metastases, which commonly occur in advanced gastrointestinal cancer and in pancreatic cancer in particular. In case of diffuse intraperitoneal metastatic spread, Hyperthermic Intraperitoneal Intraoperative Chemotherapy (HIPEC) is used as a therapeutic approach. Plasma-treated solutions may combine non-toxic characteristics with the anticancer effects of HIPEC. Previous work has provided evidence for an anticancer efficacy of plasma-treated cell culture medium but the clinical relevance of such an approach is low due to its complex formulation and lack of medical accreditation. Objective: Plasma-treated Phosphate-Buffered Saline (PBS), which closely resembles medically certified solutions, was investigated for its cytotoxic effect on 2D monolayer murine pancreatic cancer cells in vitro. Methods: Toxicity studies of primary murine fibroblasts, PDA6606 murine pancreatic cancer cells, and COLO 357 human pancreatic cancer cells exposed to plasma-treated PBS were performed. Results: Plasma-treated PBS significantly decreased cancer cell metabolisms and proliferation whereas plasma-treated Dulbecco’s Modified Eagle Medium had no effect. Moreover, tumor cell growth attenuation was significantly higher when compared to syngeneic primary murine fibroblasts. Both results were confirmed in a human pancreatic cancer cell line. Finally, plasma-treated PBS also decreased the size of pancreatic tumors in a three-dimensional manner, and induction of apoptosis was found to be responsible for all anticancer effects identified. Conclusion: Plasma-treated PBS inhibited cell growth in 2D and 3D models of cancer. These results may help facilitate the development of new plasma-derived anticancer agent with clinical relevance in the future.


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