World J Gastrointest Oncol
November 2021
Background: Hepatocellular carcinoma (HCC) is characterized by dysregulation of the immune microenvironment and the development of chemoresistance. Specifically, expression of the programmed cell death protein 1 (PD-1)/programmed cell death 1 ligand 1 (PD-L1) axis, an immune checkpoint, may lead to tumour immune escape, resulting in disease progression. The latest research shows that tumour immune escape may be caused by the upregulation of PD-L1 mediated by hypoxia-inducible factor-1 alpha (HIF-1α), and simultaneous inhibition of HIF-1α and PD-L1 has the potential to enhance the host's antitumour immunity.
View Article and Find Full Text PDFLong non‑coding RNAs (lncRNAs) play critical roles in the development and progression of cancers. The present study aimed to identify novel lncRNAs and associated microRNAs (miRNAs or miRs) and mRNAs in gastric cancer. Differentially expressed lncRNAs (DElncRNAs) and differentially expressed mRNAs (DEmRNAs) of 6 paired gastric cancer and normal tissues were identified using microarray.
View Article and Find Full Text PDFGastric cancer is one of the common malignant tumors worldwide. Increasing studies have indicated that circular RNAs (circRNAs) play critical roles in the cancer progression and have shown great potential as useful markers and therapeutic targets. However, the precise mechanism and functions of most circRNAs are still unknown in gastric cancer.
View Article and Find Full Text PDFMicroRNA plays an important role in multiple processes of cancer development. Aberrant expression of miR-183 has been frequently reported in a variety of cancer types; however, the roles and mechanisms of miR-183 in gastric cancer are largely unknown. Here, we report that miR-183 is significantly up-regulated in human gastric tumor tissues compared to the adjacent normal tissues.
View Article and Find Full Text PDFObjective: To investigate the inhibitive effects of matrine and 5-fluorouracil (5-FU) on the growth of human gastric adenocarcinoma cell line SGC-7901 when transplanted into nude mice and to investigate the bone marrow toxicity of these compounds.
Methods: 50 mg/kg and 100 mg/kg matrine with 50 mg/kg 5-FU, and 50 mg/kg matrine only, 50 mg/kg 5-FU only were intraperitoneally injected to observe their inhibitive effects by calculating the relative tumor volume (RTV) and tumor inhibition rates (IR%) as shown by the number of nucleated cells and bone marrow cell colony culture.
Results: The tumor inhibitive effect of the combined 100 mg/kg matrine and 50 mg/kg 5-FU group was stronger than that of the combined 50 mg/kg matrine and 50 mg/kg 5-FU groups (P < 0.