Effects end mechanisms of curcumol beta-cyclodextrin compound on the proliferation and apoptosls of esophageal carcinoma cell line TE-1 / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To investigate the effects and mechanisms of Curcumol beta-cyclodextrin Compound (CbetaC) on the proliferation and apoptosis of esophageal carcinoma cell line TE-1.</p><p><b>METHODS</b>The CbetaC was prepared by saturated solution and confirmed by infrared absorption spectroscopy. The effects of CbetaC (at 25, 50, 100 mg/L) on the proliferation of human esophageal carcinoma cell line TE-1 in vitro was analyzed by MTT assay. The cell cycles and apoptosis were detected by flow cytometer. The relative expression of survivin mRNA was detected by real-time fluorescent quantitative PCR and calculated by the 2(-deltaCt) method. The protein expression of survivin was measured by Western blot.</p><p><b>RESULTS</b>Compared with the control group, results of MTT showed that CbetaC at each dose significantly inhibited the proliferation of TE-1 cells in a dose-dependent manner (P < 0.05). The results of flow cytometry showed that CbetaC resulted in the cell cycle arrest at G0/G1 and G2/M phase, and promoted the cell apoptosis. Besides, when compared with the control group, the protein and mRNA expressions of survivin obviously decreased in each CbetaC group (P < 0.05).</p><p><b>CONCLUSIONS</b>CbetaC could inhibit the proliferation of esophageal carcinoma cell TE-1 and promote the apoptosis. Its inhibition on the survivin expression was correlated with its inhibition on the malignant phenotypes of esophageal carcinoma cells.</p>

Concurrent chemoradiation with paclitaxel and platinum for locally advanced esophageal cancer / 中华肿瘤杂志

<p><b>UNLABELLED</b>OBJECTIVE To assess the efficacy of concurrent chemoradiation with paclitaxel and platinum and external irradiation, and to compare the effect of extensive regional field irradiation with conventional local field irradiation for locally advanced esophageal cancer.</p><p><b>METHODS</b>From Oct. 2000 to Jan. 2006, 89 patients with locally advanced esophageal cancer were registered in this study. All patients were inoperable or refused to undergo operation. Patients were divided into two groups: extensive regional field group (51 patients) and conventional field group (38 patients). Patients received radiotherapy at a total dose of 60 Gy in 30 fractions within 7 weeks,and concurrent paclitaxel 125 mg/m2 on D1, cisplatin 20 mg/m2 on D1-D3, or oxaliplatin 130 mg/m2 on D2 in the fist and fourth week of external radiation.</p><p><b>RESULTS</b>Of these patients, 87.6% completed the treatment regimen with a response rate of 75.5% and 66.7% in the extensive regional field group and conventional field group, respectively. Grade 3 or severe toxicities of leucopenia (33.3% vs. 23.7%), thrombocytopenia (76.0% vs. 2.6%), and esophagitis (17.7% vs. 26.3%) were observed in extensive regional field group and conventional field group, respectively. Major late toxic effect was lung fibrosis. There were no statistically significant differences in the incidence of the toxicity profile between two groups. The overall 3-year survival rates was 32.8%, and the overall 3-year recurrence and metastasis-free survival rates was 34.5%. The overall 3-year locoregional control rate was 44.0%. No significant difference was found between two groups in the 3-year survival (38.2% % vs. 28.1%, P = 0.59). For the patients with stage II and stage III cancers who completed the planned treatment, large regional field radiotherapy significantly improved the 3-year survival (57.3% vs. 22.2% , P = 0.03) or 3-year recurrent and metastasis-free survival (55.5% vs. 23.0%, P = 0.03) or 3-year locoregional control (65.9% vs. 30.2%, P = 0.02) than conventional field radiotherapy.</p><p><b>CONCLUSION</b>historical results, the combination of paclitaxel/platinum and radiation in this study can improve the survival for locally advanced esophageal, and the side effect is well tolerated. Compared with the conventional field group, concurrent chemoradiotherapy with the large regional field can significantly improve 3-year survival and locoregional control for stage II or stage III esophageal cancer.</p>

Quality study of portal images acquired by computed radiography and screen-film system under megavoltage ray / 中华放射学杂志

Objective To evaluate the quality of the portal images acquired by computed radiography(CR)system and conventional screen-film system,respectively.Methods imaging plates (IP)and X-ray films of a home-devised lead phantom with a leakage of 6.45% were acquired,and modulation transfer function(MTF)curves of the both images were measured using edge method.Portal images of 40 nasopharyngeal cancer patients were acquired by IP and screen-film system respectively.Two doctors with similar experience evaluated the damage degree of petrosa] bone,the receiver operating characteristic(ROC)curve of CR images and general images were drawn according to two doctors evaluation results.Results The identification frequency of CR system and screen-film system were 1.159 and 0.806 Lp/mm respectively.For doctor one,the area under ROC curve of CR images and general images were 0.802 and 0.742 respectively.For doctor two,the area under ROC curve of CR images and general images were 0.751 and 0.600 respectively.The MTF curve and ROC curve of CR are both better than those of screen-film system.Conclusion The image quality of CR portal imaging is much better than that of screen-film system.The utility of CR in linear accelerator for portal imaging is promising in clinic.