Abstract In our study, CCK-8 assay and LDH release detection were performed to detect the optimal protective concentration of GSH on HL7702 cell viability during H/R injury. HL7702 cells were randomly divided into four groups: Control group, H/R group, H/R+GSH group, and H/R+GSH+HO-1-siRNA group. Then, reactive oxygen species (ROS) was evaluated by DHE staning, MDA, T-SOD measurements; Cell injury was detected by CCK-8, LDH release, and supernatant AST and ALT levels; Apoptosis was determined by Hoechst staining and caspase 3 level. Compared with controls, H/R caused significant HL7702 cell injury evidenced as reduced cell viability, increased LDH release and apoptotic cell death (P < 0.01), with concomitant increases in ROS and MDA production (P < 0.01), while treated with GSH in H/R group significantly attenuated oxidative injury, enhanced cell viability and downregulated cell apoptosis (P < 0.01) together with HO-1 upregulation (P < 0.01). Knockdown HO-1 by its siRNA cancelled the protective effects of GSH from H/R compared with GSH group (P < 0.01). HO-1 was induced in HL7702 exposed to H/R injury and its level was obviously overexpressed after H/R injury with GSH treatment, suggesting its protective potential in GSH against H/R injury. GSH increases the expression of HO-1, which enhanced the early antioxidative activity and played a protective role against HL7702 cells H/R injury.

Abstract The present investigation is concerned with the dynamic seismic response of subway station built in loess site by a series of shaking table tests. Firstly, according to the Bockingham π theorem, the scale ratio is determined and then the model system is designed. Then, based on the geological environment and seismological background of Xi’an, the input ground motions and loading scheme are determined. On the basis of the test data, the acceleration responses of model system, strain response characteristics of the structure, distribution of dynamic soil pressure between loess and structure, the settlement of model ground and the seismic damage mode of model system are analyzed systematically. The results show that the peak accelerations in model soil increase gradually from the bottom to the top of the soil. The peak tensile strains measured at the top and bottom of the center columns are larger than those obtained at the side walls, while the peak tensile strains in the floor slab are the smallest. Moreover, the relationship between structure uplift and soil pressure difference can be fitted by exponential function.

Complementary DNA (cDNA) is valuable for investigating protein structure and function in the research of life science, but it is difficult to obtain by traditional reverse transcription. In this study, we employed a novel strategy to clone the human leukemia inhibitory factor (hLIF) gene cDNA from genomic DNA directly isolated from the mucous membrane of mouth. The hLIF sequence can be acquired within a few hours by means of amplification of each exon and splicing using overlap-PCR. Thus, the new approach developed in this study is simple, time- and cost-effective, and it is not limited to particular gene expression levels of each tissue.