To investigate the effect of epidermal growth factor (EGF) on the expression of osteopontin (OPN) in liver cancer HepG2 cells.

Aldose reductase like gene-1 overexpresses in hepatocellular carcinomas; it might be the drug resistance- associated gene to anti-tumor drugs containing carbonyl groups on hepatocellular carcinomas. This study was designed to establish human hepatocellular carcinoma cell line (HepG2) transfected with aldose reductase like gene-1 (ARL-1), then to observe the changes of drug resistance to anti-tumor drugs with carbonyl group and screen the drug resistance-associated genes through cDNA chip.

Previous study showed that allitridi markedly suppresses cellular proliferation, blocks cell cycle at G(1) phase, and induces cell apoptosis of human gastric cancer BGC823 cell. During the investigation of its molecular mechanisms and target genes, the authors found that protein expression of cyclin D1 and p27(Kip1) play an important role in an allitridi-induced G(1) arrest. This study was designed to explore the effect of allitridi on the expression of cyclin D1 and p27(Kip1) in BGC823 cells.

To observe effects of beta-asaron on gene expression in BALB/c mouse brain by gene chip.

To compare the effect of epidermal growth factor (EGF), thyrotropin releasing hormone (TRH) and dexamethasone (Dex) on the expression of surfactant protein (SP)-A, SP-B and SP-C mRNA in fetal rabbit lungs.

To study the biological basis of selenium in resisting senescence through its effects on cellular telomerase activity and telomere length. In the experiments, the cell line of hepatocytes L-02 was divided into three groups supplemented with sodium selenite at final concentrations of 0, 0.5 and 2.5 micromol/L, respectively. Cellular telomerase activity was measured by telomeric repeat amplification protocol and enzymatic luminometric inorganic pyrophosphate detection assay. RT-PCR was used to semi-quantitatively detect human telomerase reverse transcriptase (hTERT) gene expression. The change of telomere length was assayed through flow cytometry and fluorescence in situ hybridization. Results showed that L-02 cells had low telomerase activity and hTERT gene expression level when cultured in the normal way. The cells grew well after 3-week-cultivation in the media supplemented with 0.5 or 2.5 micromol/L sodium selenite. Besides, sodium selenite significantly increased cellular telomerase activity and hTERT gene expression level. The telomere length of L-02 cells was also extended after 4-week-cultivation with sodium selenite. Thus, sodium selenite at nutritional doses could prolong the life span of hepatocytes L-02 through increasing telomerase activity and telomere length. This result provides a possible mechanism for explaining the anti-senescence function of selenium.

To study the effect of oleate on ATP binding cassette transporter A1 (ABCA1) expression and cholesterol efflux in THP-1 macrophage-derived foam cells, after exposure of the cultured THP-1 macrophage-derived foam cells to oleate for different time, cholesterol efflux was determined by FJ-2107P type liquid scintillator. ABCA1 mRNA and its protein level were determined by RT-PCR and Western blot, respectively. The mean ABCA1 fluorescence intensity of THP-1 macrophage-derived foam cells was detected by flow cytometry. The results showed that oleate markedly inhibited ABCA1-mediated cholesterol efflux from THP-1 macrophage-derived foam cells. This was accompanied by a reduction in the membrane content of ABCA1. Oleate did not alter ABCA1 mRNA abundance, indicating that decreased ABCA1 transcription, enhanced mRNA decay, or impaired translation efficiency did not account for these inhibitory effects. Oleate, however, increased ABCA1 turnover when protein synthesis was blocked by cycloheximide. Oleate reduces cholesterol efflux and the level of ABCA1 protein in THP-1 macrophage-derived foam cells.

To investigate the effect of Coptis Chinensis compound on the gene expression of transplanted tumor in nasopharyngeal carcinoma cell line of CNE1.

To detect the expression of estrogen sulfotransferase (EST) in breast tissues, and to investigate its significance in breast carcinogenesis and the relationship between EST mRNA and estrogen.

To observe the regulative effects of 17 beta-estradiol (17 beta-E(2)) and ICI 182780 on the expression of osteoprotegerin (OPG), the ligand of osteoprotegerin (OPGL) and the related cytokines [macrophage colony-stimulating factor (M-CSF), TRAIL and transforming growth factor beta(TGF beta)] in MG63 cells.

To study the relationship between COX-2 expression in esophageal cancer cell (EC/CUHK-1) and mitomycin C (MMC) treatment.

To understand whether endotoxin lipopolysaccharide (LPS) is able to induce the expression of macrophage inflammatory protein-1alpha (MIP-1alpha) mRNA and protein in human umbilical vein endothelial cells (HUVECs).

To investigate the effect of Shen-Mai injection (SMI) and aminophylline on diaphragmatic muscle cell apoptosis and the Fas/FasL expression in chronic hypoxic rats.

To explore the effects of arsenic trioxide (As2O3) on tissue factor (TF), plasminogen activator inhibitor-1(PAI-I) and PAI-2 expression in NB4, HL-60 and THP-1 cells.

To elucidate the effect of angiotensin II (AngII) on the expression of tissue factor (TF) by monocytes and its mechanisms.

To design and make trial of a new therapy for Gaucher disease.

To investigate the molecular mechanisms of saponins from the rhizome of Anemarrhena asphodeloides Bunge.

To obtain a serial differentially expressed cDNA fragments from human osteoblast-like osteosarcoma MG-63 cells induced with 17beta-estradiol and to find some estrogen-responsive genes.

To examine the effects of sodium valproate(VPA) treatment and withdrawal on the expression of GABA transporter-3 (GAT-3) and GABA transaminase (GABA-T) mRNA in C6 glioma cells, and to explore the role of GAT-3 and GABA-T in the rebound mechanism of VPA withdrawal.