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We investigate the effect of specific antisense oligodeoxynucleotide (ASO DN) inhibition of Fas expression on T cell apoptosis induced by gastric carcinoma cell . Fas receptor (Fas) and Fas ligand (FasL) expressed by the gastric carcinoma cell line SGC-7901 and Jurkat T cells were detected by flow cytometry (FCM) and the ability of Fas L-inducing T cell apoptosis was tested by co-culture assay in...
We studied the Fas/anti-Fas system to induce killing of Fas-expressing immunocytes with resultant immunosuppression. W7TM-1 tumour cells, a rat T-cell line, were inoculated subcutaneously in BALB/c mice and tumour growth was monitored in untreated mice and in mice treated with RMF2. Prior to treatment with RMF2, we examined the expression of Fas in isolated splenocytes and in tumour infiltrating lymphocytes...
We investigate the anticancer effect of a traditional Chinese medicine gambogic acid (GA) in human gastric cancer line SGC-7901 and further study the mechanism of apoptosis induction of GA.Low differential human gastric cancer line SGC-7901 were treated with GA at different doses and different times, the inhibitory rates were detected by MTT assay. Apoptosis induced by GA in SGC-7901 cells was observed...
We explore whether antisense oligodeoxy-nucleotides (ASODN) targeting survivin gene can reverse apoptotic resistance induced by cisplatin in human lung adenocarcinoma cells. A549 / CDDP cell lines were cultured routinely with RPMI-1640 medium. Survivin ASODN mediated by cytofectin was transfected into the A549 / CDDP cells. The influence of ASODN transfection on apoptosis was determined by Diphenylamine...
This study was designed to assess E-cadherin (E-cad)and proliferating cell nuclear antigen (PCNA)expression as well as their clinicopathological significance in human non small cell lung cancers (NSCLCs). Possible molecular mechanisms of differentiation and metastasis of NSCLCs are discussed. Immuno-histochemical and immunofluorescence double staining were performed to examine the expression of E-cad...
We verify whether P-glycoprotein (P-gp) could induce cell resistance to apoptosis by inhibiting caspase-8 and caspase-3. Human KB cells, either drug-sensitive or with multidrug resistance (MDR) phenotype caused by Over- expression of P-gp (KBv200 cells), were treated with anti-Fas (CH-11) to induce apoptosis. Cytotoxicity was detected by MTT assay. Symptoms of cell death were assessed by morphological...
We investigate the effects of anti-Fas ribozyme on Fas expression and apoptosis in primary cultured Neonatal mouse ventricular myocytes. Neonatal mouse ventricular myocytes were isolated by using collagenase irrigation. A hammerhead ribozyme targeting the Fas mRNA was constructed, and transfected into Neonatal mouse ventricular myocytes via Effectene. Then Fas expression in Neonatal mouse ventricular...
Objective: To study the relationship between the methylation status of multi-drug resistance protein (MRP) gene and the expression of its mRNA and protein in lung cancer cell lines. Methods: Human lung cell line WI-38.1ung adenocarcinoma cell line SPCA-1 and its drug-resistant cells induced by different concentrations of doxorubicin were treated with restriction endonuclease Eco47III. The methylation...
To observe the influence of hyperthermia under different temperature on the growth, apoptosis of Human Lung Cancer cell of A549, H1299 to investigate the possible mechanism of apoptosis in lung cancer cell caused by p53 with different activity. Human lung cancer cell of A549, H1299 was heated under 40??C 42??C 44??C separately for 2 hours each in the water bath case. After the hyperthermia under different...
AIM To study the activation of CTLs against gastric cancer cells induced by FasL/B7-l (FB-ll)genes modified tumor cells, and to explore whether co-expression of FasL and B7-1 in SGC-7901 tumor cells could initiate an synergistic antitumor effect. METHODS FasL and B7-1 genes were transfected into human SGC-7901 gastric cancer cells with adenovirus vectors. The positive clones were selected by G418...
With the advance of immunology, immunogene therapy is becoming a possible therapeutic alternative to advanced cancer. The aim of tumor immunogene therapy is to enhance the immune response to tumors. Evidence suggests that CD80 (B7-1) and Interferon-gamma (IFN-gamma) play important roles in antitumor immunity induced by T lymphocyte. To study the antitumor immune effects of lung carcinoma vaccine modified...
AIM: In the present study, murine A549 Lung cancer cells were provided Lung cancer with different thermal dose invitro and invivo, thereafter we investigated the apoptosis, necrosis rates, and intratumoral microvessel density (MVD) to determine that microvessel damage plays an important role in the tumoricidal effect of Lung cancer. Methods: A549 Lung cancer cells were inoculated in the right hind...
Investigate the relationship between caspase-3 expression and apoptosis in lung adenocarcinoma cell line A-549 who was transfected with Adenovirus-mediated FasL gene. Human lung adenocarcinoma cell line A-549 was transfected with Adenovirus-mediated FasL gene. The expression of caspase-3-, apoptosis morphological changes were measured using flow cytometry, RT-PCR assays, the activity of caspase-3...
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