Propofol Suppresses Proliferation, Migration, Invasion And Promotes Apoptosis By Upregulating microRNA-140-5p In Gastric Cancer Cells.

PURPOSE: This study aimed to investigate the anti-tumor effect of propofol on gastric cancer (GC) and its underlying mechanisms. PATIENTS AND METHODS: SGC-7901 and MKN45 cells were transfected and divided into the following groups: Control group, Propofol group, Propofol+miR-140-5p inhibitor group and miR-140-5p inhibitor group. Moreover, cell proliferation, apoptosis, migration and invasion of SGC-7901 and MKN45 cells were evaluated by BrdU incorporation assay, Annexin V-FITC/PI double staining assay, wound healing assay and transwell assay, respectively. The mRNA expressions of matrix metalloproteinase 2 (MMP-2) and MMP-9 were detected by qRT-PCR. Cleaved caspase-3, Bcl-2, MMP-2 and MMP-9 expressions were detected by Western blot. RESULTS: Propofol inhibited cell proliferation, migration and invasion, but promoted cell apoptosis in SGC-7901 and MKN45 cells. Propofol also elevated the expression of miR-140-5p. Suppression of miR-140-5p could reverse the effects of propofol on the biological behavior of SGC-7901 and MKN45 cells. Meanwhile, propofol treatment increased the expression of cleaved caspase-3 but decreased Bcl-2, MMP-2 and MMP-9 in SGC-7901 and MKN45 cells. The expression of cleaved caspase-3 was downregulated while Bcl-2, MMP-2 and MMP-9 were upregulated by miR-140-5p suppression. CONCLUSION: Propofol could inhibit cell proliferation, migration and invasion, as well as promote cell apoptosis by upregulating miR-140-5p in gastric cancer cells.

Preparation of Zn-Doped Biochar from Sewage Sludge for Chromium Ion Removal.

Recycling and reuse waste can result in significant savings in materials and energy. In this study, the adsorption of Cr(VI) was analyzed using activated carbon (AC) and biochar (BSC) made from sewage sludge. BSC materials were synthesized using zinc chloride as an activator coupled with carbonized sewage sludge. Specific surface area, pore size distribution, and pore volume were determined by measuring nitrogen adsorption-desorption (BET). BSC morphology was measured using field-emission scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS). Results showed that the surface area and average pore volume of the BSC were 490 m2 g-1 and 0.8 cm3 g-1, respectively. SEM results revealed that BSC had uniform pore size. Effects of varying the initial Cr(VI) concentrations, pH values, and dosages of BSC on adsorption performance were also determined. Results showed that the maximum removal efficiency of Cr(VI) was above 99%, and adsorption capacity of 50% ZnCl2-BSC was 677 mg g-1.

[Anti-tumor effects of ampelopsin on human lung cancer GLC-82 implanted in nude mice].

OBJECTIVE: To investigate the effects of ampelopsin on the growth of human lung cancer cell line GLC-82 in nude mice. METHODS: GLC-82 cells were inoculated into the armpit of nude mice to establish lung cancer model. Then the BALB/C nude mice 6 with xenograft tumor were randomized into 6 groups. Ampelopsin was administered at 3 dosages by intraperitoneal injection daily. The anti-tumor effect of ampelopsin was evaluated on tumor volume, relative tumor volume, tumor weight, relative tumor proliferative rale, and tumor growth curve. RESULTS: At the 250 mg/kg dose of ampelopsin, the growth inhibition of the transplant tumor was 35.5% (P < 0.01) and 37.1% (P < 0.01), and the relative tumor proliferative rate was 55.24% (P < 0.01) and 57.71% (P < 0.05), respectively in two independent experiments by compared with the normal saline control. CONCLUSION: Ampelopsin appears to be a potent anti-tumor agent that was firstly discovered in the transplant human lung cancer cell line GLC-82 in nude mice in vivo.