[Effects of Betulinic acid on apoptosis in human gastric cancer SGC-7901 cells].

To investigate the effects of betulinic acid on apoptosis of human gastric cancer SGC-7901 cells. The human gastric cancer SGC-7901cells were divided in to 4 groups, and each group was set with 3 replicates. The SGC-7901cells in control group were not treated with betulinic acid; the other 3 experimental groups were treated with betulinic acid at the concentrations of 10, 20 and 30 mg/L, respectively; each group was incubated in a 5% carbon dioxide incubator for 48 h.

[Effects of betulinic acid on apoptosis of human gastric cancer MGC-803 cells].

The effects of betulinic acid (BA) on apoptosis of human gastric cancer MGC-803 cells was investigated by using human gastric cancer MGC-803 cells as experimental materials, and the basis for its clinical application was provided. The human gastric cancer MGC-803 cells were divided into 4 groups,each group was set with 3 replicates.The control group was MGC-803 cells without being added betulinic acid; the other 3 groups of experimental groups were treated with betulinic acid at final concentrations of 10, 20 and 30 μg /ml respectively.

[Toosendanin induces apoptosis of human gastric cancer MGC-803 cells and its mechanism].

To explore the apoptosis of human gastric cancer MGC-803 cells induced by toosendanin(TSN) and its mechanism. The human gastric cancer MGC-803 cells were divided into 5 groups, each group was set with 3 replicate. Fluorouracil (5-FU) and 0 nmol/L toosendanin (TSN) were used as positive control and negative control, respectively.

[Effect of betulinic acid on proliferation of human gastric cancer MGC-803 cell line].

To investigate the effect of betulinic acid on the proliferation of human gastric cancer MGC-803 cells Methods: Human gastric cancer MGC-803 cells were divided into 4 groups, each with 3 multiple holes. Control cells add betulinic acid at a concentration of 0 μg /ml, and the other three experimental groups were added with final concentration of 10, 20, 30 μg/ml Betulinic acid respectively. Cells in each group were incubated in a 5% CO incubator for 48 hours, and the Giemsa staining method and trypan blue exclusion method were used to detect the effect of betulinic acid on the cell clone formation rate and growth inhibition rate; EdU method and flow cytometry were used to detect cell proliferation and cell cycle changes; qRT-PCR and Western blot were used to detect the expressions of cell cycle regulators CCNB1 and CCND1.

[Effects of betulinic acid at different concentrations on autophagy of human gastric cancer MGC-803 cells].

In this study, human gastric cancer MGC-803 cells were treated with betulinic acid at different concentrations to investigate its effect on cell autophagy. The human gastric cancer MGC-803 cells were divided into 4 groups, each group was set with 3 replicate. The control group was not treated with betulinic acid, the other three groups were added with final concentration of 10,20,30 mg/L betulinic acid, respectively.

[Effect of betulinic acid on proliferation of human gastric cancer SGC-7901 cells].

Human gastric cancer SGC-7901 cells were treated with betulinic acid(BA)at the concentrations of 0, 10, 20, and 30 μg/ml, and treated with conventional chemotherapeutic drug 5-Fu as a positive control to explore its effect on cell proliferation. Trypan blue and GIEMSA staining method were used to investigate the effect of BA on cell growth inhibition and clone formation. EdU method and flow cytometry were used to explore the proliferation and cell cycle of SGC-7901 cells after treated with BA, respectively.

The α-Subunit of the Chloroplast ATP Synthase of Tomato Reinforces Resistance to Gray Mold and Broad-Spectrum Resistance in Transgenic Tobacco.

Chloroplast ATP synthase (cpATPase) is responsible for ATP production during photosynthesis. Our previous studies showed that the cpATPase CF1 α subunit (AtpA) is a key protein involved in -induced resistance to the fungus in tomato. Here, we show that expression of the tomato gene was upregulated by and The tomato gene was then isolated, and transgenic tobacco lines were obtained.

Highly sensitive detection of protein with aptamer-based target-triggering two-stage amplification.

Highly sensitive detection of proteins is essential to biomedical research as well as clinical diagnosis. However, so far most detection methods rely on antibody-based assays and are usually laborious and time-consuming with poor sensitivity. Here, we develop a simple and sensitive method for the detection of a biomarker protein, platelet-derived growth factor BB (PDGF-BB), based on aptamer-based target-triggering two-stage amplification.

Advancement and prospects of tumor gene therapy.

Gene therapy is one of the most attractive fields in tumor therapy. In past decades, significant progress has been achieved. Various approaches, such as viral and non-viral vectors and physical methods, have been developed to make gene delivery safer and more efficient.

Reversal of MDR1 gene-dependent multidrug resistance in HL60/HT9 cells using short hairpin RNA expression vectors.

Multidrug resistance (MDR) is a serious obstacle to cancer chemotherapy. Overexpression of P-glycoprotein (P-gp), the MDR1 gene product, confers MDR to tumor cells. This study explored the possibility of reducing drug resistance by targeting the mdr1 gene using short hairpin RNA (shRNA).