The selective toxicity of the mitochondria-specific cationic fluorescent dye rhodamine 123 (Rh-123) on HeLa cells in culture was studied. In this report, we demonstrate that with continuous exposure, Rh-123 markedly inhibited the growth of HeLa cells but had little effect on normal human kidney fibroblasts. With continuously exposed to Rh-123, the growth rate, colony forming ability, and mitotic index of HeLa cells were decreased. The mechanism of toxicity of Rh-123 on HeLa ceils was investigated by EM and enzyme cytochemistry stain. The mitochondria of carcinoma cells were the main targets for the inhibitory action of Rh-123, since they selectively accumulated the dye. At the dosage of Rh-123 which was toxic to HeLa cells, the structure and function of mitochondria were disrupted, as the mitochondriarelated enzymes, i. e., ATPase, LDH, and SDH were inhibited. The possible mechanism of the action of Rh-123 on HeLa cells is briefly discussed.

This paper reviewed the existing literatures of executive function in obsessive -compulsive disorder (OCD) patients, and critically examined four neurocognitive tests in the recent ten years' studies, including stroop task, Wisconsin Card Sorting Test(WCST),London tower, and Trail-making test. In addition, we discuss the problems occurred in the past experiments, and put forward suggestions for further studies.

OBJECTIVE:To study the preparation of fluconazole eyedrops as well as its quality control.METHODS:The content of fluconazole in eyedrops was determined with HPLC.The quality control of eyedrops has done in accordance with ChP.RESULTS:The average recovery was100.4%,RSD=0.54%(n=5).CONCLUSION:The formula of this preparation is reasonable with simple and convenient technology.Moreover,its quality control is easy to handle.

Objective: To develop the Chinese mood adjective check list (CMACL) and study the validation of this scale. Methods: The CMACL was filled by 1010 subjects aged 21.0 ? 7.4, 507 males and 464 females (39 lost gender information), which were randomly split into two samples after balancing the gender for exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). 232 middle school students divided into five groups according to their grades were engaged in the test-retest study at the first to fourth and sixth weeks. 34 volunteers finished the CMACL and self-rating depression scale (SDS) and 30 college students joined the validation study to test the correlation between the CMACL and state trait anxiety inventory. Results: A four-factor model was found by EFA and confirmed by CFA, which has the following dimensions: Fidget(F)?Happy and excited(HE), Pain and sad(PS),Angry and hate(AH). 30 items were also left in the CMACL after the modification(GFI=0.902,AGFI=0.883,NFI=0.884,TLI=0.931,CFI=0.937,RMSEA=0.046). Reliabilities of the four factors are higher than 0.80. Validation studies showed: (1) SDS total score is significantly positive-correlated with F (P

Objective: to develop the peptic ulcer (PU) symptoms self rating scale (PUSRS) and study the validation of this scale. Methods: The PUSRS was filled by 151 PU patients, 118 males and 30 females (3 lost gender information, aged 38.61?14.99), which were recruited from 18 gastroenterology departments. 30 PU patients were engaged in the test-retest study. 40 PU patients and 30 gastritis patients joined the discriminate validation study. Results: Two factors, pain factor (PF) and dyspepsia factor(DF), were found by exploratory factor analysis. Reliabilities of the two factors are 0.786 (PF) and 0.753(DF). Validation studies showed that PU patients have significantly higher PUSRS total score (P

Objective To study the curative effect of major aphthous ulcer using povidone-iodine,H_2O_2 asso- ciated with levamisole liniment.Methods The RAU patients were divided into 2 groups randomly.The patients of curative group were instructed to use povidone-iodine,H_2O_2 and levamisole liniment;The control group were in- structed to take metronidazole,antibiotics,compound vitamin B and vitamin C.Then the patients were observed peri- odically.Results The success rate of curative group was 85 % and the control group was 55 %.The difference had statistical significance(P＜0.01).Conclusion Treatment of major aphthous ulcer using povidone-iodine,H_2O_2 and levamisole liniment is effective.

Objective To evaluate the ability of virtual CT colonoscopy to detect colorectal proliferative lesions in endoscopically proven patients and its clinical application prospects. Methods Virtual colonoscopy was performed using thin section helical computed tomography of the abdomen and pelvis in 23 patients with conventional colonoscopic findings suggestive of abnormalities within 1 hour. The data from CT scanning was processed by computer with specific commercial software, two and three dimensional reconstruction was subsequently made. Results The diagnosis of colorectal carcinomas was made on virtual colonoscopy in 21 cases, among which 20 cases were endoscopically diagnosed as cancers and 1 case was found sigmoid stricture of unknown causes, that was finally confirmed surgically and pathologically. All polyps greater than 11 mm were identified both by conventional endoscopy and virtual colonoscopy. 19 polyps with size of 6～10 mm were detected on virtual colonoscopy, the location and size of 13 polyps were in accordance with those of endoscopic findings, 2 false positive polyps were reported in 6 newly detected polyps. Virtual colonoscopy correctly localized all 21 cancers, compared with 18 using conventional colonoscopy. Conclusion Virtual colonoscopy is a valuable clinical method in diagnosis of colorectal cancers and polyps with size larger than 6 mm, and it is a good indication for colonic stricture and colonoscopy intolerable patients.

Objective To observe and evaluate clinical feasibility and efficacy of endoscopic metal stenting and combined radiotherapy in treatment of medium and late stages of esophageal carcinoma. Methods 34 cases of medium and late stages of esophageal carcin oma were treated with endoscopic stent implantation and in combination with sten t and radiotherapy. Evaluation of CES stainless metal stent on rad iation effect, clinical symptom alleviation and complication rates and survival rates in both groups was made. Results 1) CES stainless stent had no effect on radiation dosage distribution; 2) Dysphagia was markedly alleviated in both groups and no differe nce in complication rates was observed between two groups; 3) The survival rates of 6,9,12 months in patients treated with combined therapies were significantly higher than those in simple stent implantation patients. Conclusions Endoscopic metal stenting in combination with radiothe rapy was a feasible and practical management in treating medium and late stages of esophageal carcinoma, which was superior to simple metal stent implantation.

Objective To evaluate the clinical value of magnifying chromoscopy in combination with Kudo criteria in detection and diagnosis of colorectal lesions. Methods After conventional electronic colonoscopic diagnosis of 125 colorectal lesions, staining and magnifying observation by chromoscopy were made with Kudo criteria, and biopsy specimen and resected samples were sent for pathologic examinations. Results The accuracy of ordinary colonoscopy and magnifying colonoscopy compared with histological diagnosis of inflammatory polyps, tubular adenomas, villous adenomas and colorectal cancer was 95.62%, 80%, 90% and 100% respectively and 100%, 93.75%, 92.86% and 100% respectively. The overall accuracy of two procedures was 85.6% and 95.2% respectively. Conclusions Magnifying chromoscopy is valuable in detection of tiny and slightly elevated colorectal lesion, and has high efficacy in judging the nature of lesions with Kudo criteria.

Objective To investigate the expression of apoptosis regulating protein Bcl-2 and Bax,and the spontaneous apoptotic index(AI) in malignant mesothelioma,and their relationship to the survival time of patients.Methods Hematoxylin-eosin and immunohistochemical stainings were used for the sections of paraffin embedded tissues of 79 specimens of malignant mesothelioma.The terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling(TUNEL) was used to identify the apoptotic tumor cells.Results The age of the patients with malignant mesothelioma ranged from 11 to 79 years.The peak incidence of malignant mesothelioma was at the age of 40-50 years.The ratio of male to female was 1.47∶1.The survival time of the 79 cases was between 5 and 160 months,and the medial survival time was 23 months.According to histological pictures,these tumors were diagnosed as epithelioid type(51 cases),mixed type(8 cases) and sarcomatous type(20 cases).The tumor spontaneous apoptotic index(AI) was 0.14%-6.9%.The survival time of the patients with higher AI was significantly shorter than those with lower AI(P