ABSTRACT
Objective To investigate the antitumor effect of specific cytotoxic T lymphocytes induced by renal cell carcinoma multiple antigen peptide dendritic cell (DC) vaccine in vitro. Methods Dendritic cells were induced by hGM-CSF,hIL-4 from blood.Peptide of renal cell carcinoma cell line (RCC786-0)was got by citrate-phosphate buffer elution.Peripheral blood mononuclear cell was cultured.Multiple antigen peptide DC cell vaccine was obtained by acid-eluted peptide pulsed DC.The tumor antigen specific CTL was generated from activated T cell by vaccine.Killing activity of the tumor antigen specific CTL was activated by vaccine. Results Antigen peptide DC cell vaccine could show a strong cytotoxic activity of CTLs(31.93±5.05%),which was much higher than control groups(5.88±2.26%,8.03±6.70%,9.70±2.09%,9.35±3.58%). Conclusion Renal cell carcinoma antigen peptide DC vaccine could show a high antitumor effect in vitro.
ABSTRACT
Objective To explore the expression of the nerve growth factor receptors p75 (p75NGFR) in human bladder carcinoma samples, and the effects of hypoxia on the expression of p75NGFR in human bladder cancer ceils. Methods The expression of p75NGFR in 107 bladder cancer and lymph node specimens were immunohistochemically investigated. The expression of p75NGFR in bladder cancer cell line (T24) was assessed by immunocytochemistry, and reverse tran-scription-PCR in the Normoxic Condition (air, 5%CO2) and in hypoxia condition(10%O2, 5%CO2, 85%N2). Results p75NGFR expressed in 46 of 107(43.0%) tumor samples. There was no signifi-cant correlation between p75NGFR and the factors such as gender, age, extent of the tumors, and pathologic grading(P0.05), p75NGFR was expressed in examined cell line T24, and also expressed in 5 of 24 bladder tumors in metastasized lymph node specimens. Hypoxia markedly down-regulated the expression of p75NGFR of T24 cell line at third day. Conclusions It is suggested that p75NGFR is expressed less in lymph node metastasis. Hypoxia markedly inhibited expression of p75NGFR of T24 cell lines.