Screening of drug resistent gene by cyclical packaging rescue of hepatocellular carcinoma retroviral cDNA libraries / 生物工程学报

Multidrug resistant genes are highly expressed in hepatocellular carcinoma that seriousty affects the effect of chemotherapy. Screening of resistant genes from HCC cells and studying its mechanism of drug resistance will be helpful to improve the effecacy of chemotherapy for hepatocellular carcinoma. Here we described an alternative method called cyclical packaging rescue (CPR). First we constructed a retrovirus cDNA library of hepatoma cells and used it to infect fibroblasts. Then we added drugs to screen survival cells. The survival cells, stably integrated helper-free retroviral libraries, were recovered rapidly after transfection with plasmids expressing retroviral gag-pol and env genes. Through this method, retroviral RNAs were directly repackaged into new infectious virions. Recovered retroviral supernatant was then used to reinfect fresh target cells. When performed in concert with selection using functional assays, cDNAs regulating functional responses could be identified by enrichment through multiple rounds of retroviral library recovery and retransmission. Using CPR, we obtained several cDNAs. After a preliminary detection, we found Ribosomal protein S11 (RPS11), Ribosomal protein L6 (RPL6), Ribosomal protein L11 (RPL11), Ribosomal protein L24 (RPL24) possibly had drug resistant function.

The influence of early rehabilitation intervention on the recovery of patients who have undergone the low rectal cancer resection / 中国实用护理杂志

Objective To investigate the influence of early rehabilitation on the recovery of patients who have undergone the low rectal cancer resection. Methods 130 patients with low rectal cancer resection were divided into the rehabilitation group and the control group randomly, there were 65 cases in each group. The control group were accepted the routine nursing care, and the rehabilitation group were accepted the early recovery intervention. Compared the time of anus exhaust, the time of stomach extubation, the incidence rate of postoperative complication, the time of bed rest and the quality of postoperative life in these two groups. Results All the indexes which have compared between these two groups were significant better in the rehabilitation group than those of in the control group, P