AIM To determine whether the I Kr channel protein is altered and its response to dofetilide and verapamil in cardiac remodeling by L thy roxin. METHODS Saturation binding assays in guinea pig ventricular membrane preparation with 125 I dofetilide, a radioligand for the cardiac rapidly activating delayed outward rectifier channel (I Kr ) was conducted respectively in normal, hypertrophied, Verapamil or dofetilide intervened group. RESULTS Scatchard analysis revealed two binding sites with different affinities in normal guinea pig ventricle: a high affinity site [ K d=(1 27?0 11) nmol, B max =(34 67?3 23) nmol?g -1 ] and a low affinity site [ K d=(43 48?4 83) nmol, B max =(76 41?5 37) nmol?g -1 ] ( n =5), only the high affinity site was associated with the I Kr in guinea pig ventricle. The B max of high affinity site in the hypertrophied ventricle induced by L thyroxin was down regulated to (18 13?2 27) nmol?g -1 ( n =6). Verapamil was effective to up regulate the high affinity B max to (37 26?4 32) nmol?g -1 ( n =5) but dofetilide had hardly effect on it. CONCLUSION The I Kr channel protein in guinea pig ventricular membrane was down regulated in remodeling ventricle by chronic L thyroxin treatment and improved by verapamil.

Objective To compare selenium content in hair samples of people in Kaschin-Beck disease (KBD) areas and non KBD areas two months after stopping selenium salt in Shaanxi Province,to provide a scientific basis for KBD control and prevention.Methods In September 2012,four historical KBD areas were selected,including Yongshou,Yuyang,Linyou and Nanzheng,four villages were selected as monitoring sites according to the four directions as east,west,south and north in each county.Meanwhile,four non KBD areas were selected,including Wugong,Mizhi,Qishan and Chenggu,which adjacent to the survey counties and were similar to the survey counties in environment and production and living conditions.Four villages were selected as monitoring sites according to the four directions as east,west,south and north in each county.Lianhu District in Xi'an city was selected as a urban non KBD area.Four communities were selected in the east,west,south and north as the monitoring sites.In each monitoring point,hair samples of 8 children aged 7-12 years old (gender balanced) and 8 adults over the age of 16 (gender balanced) were selected to determine the hair selenium.Samples were disposed by wet digestion method,the selenium content was determined by 2,3-diaminonaphthalene fluorescence method.Results A total of 256 hair samples were collected in the four KBD counties,256 hair samples in four non KBD counties,64 hair samples in one urban district.The average of hair selenium in each monitoring point was ≥0.25 mg/kg.Compared the hair selenium content in KBD areas,rural non KBD areas,and urban non KBD areas [(0.40 ±0.23),(0.42 ± 0.28),(0.37 ± 0.38) mg/kg],the differences were not statistically significant (F =0.045,P ＞ 0.05).In KBD areas,the hair selenium content of 37 people was ＜ 0.20 mg/kg,accounting for 14.45％;28 people was 0.20-＜ 0.25 mg/kg,accounting for 10.94％;127 people was 0.25-＜ 0.50 mg/kg,accounting for 49.61％;64 people was ≥ 0.50 mg/kg,accounting for 25.00％.In non KBD areas,the hair selenium content of 67 people was ＜ 0.20 mg/kg,accounting for 20.94％,28 people was 0.20-＜ 0.25 mg/kg,accounting for 8.75％;143 people was 0.25-＜ 0.50 mg/kg,accounting 44.69％;82 people was ≥0.50 mg/kg,accounting for 25.63％.Compared the hair selenium content of children aged 7-12 and adults in KBD areas,rural non KBD areas,and urban non KBD areas [children:(0.45 ± 0.29),(0.47 ± 0.31),(0.33 ± 0.12) mg/kg;adults:(0.41 ± 0.25),(0.37 ± 0.25),(0.40 ± 0.49) mg/kg],the differences were not statistically significant (F =0.007,0.024,all P ＞ 0.05).Compared the hair selenium content in different gender in KBD areas,rural non KBD areas,and urban non KBD areas [maile:(0.43 ± 0.23),(0.43 ± 0.26),(0.40 ± 0.51) mg/kg;female:(0.38 ± 0.22),(0.41 ± 0.31),(0.34 ± 0.18) mg/kg],the differences were not statistically significant (F =0.872,3.589,all P ＞ 0.05).Conclusion Two months after stopping to supply selenium salt in 2012 in Shaanxi Province,the hair selenium content of residents in KBD areas has not dropped significantly.Since this survey is carried out only 2 months after taking the measure,it is necessary to continue to monitor the selenium level in KBD areas.

Objective To analyze the advantage of altered fractionation radiotherapy by calculating the accumulative effects of daily biologically effective dose (BED) to find out the difference between conventional fractionated radiotherapy and altered fractionation radiotherapy.Methods The data in the report of hyperfractionated or accelerated radiotherapy for head and neck cancer published by Cochrane Collaboration in 2010 was analyzed.Based on the radiotherapy processes mentioned in this report,the accumulative effects of daily BED were calculated and compared in different radiotherapy processes by using linear-quadratic mode.The variation of BED in different radiotherapy processes was find out.Results In total dose of unity as the premise of 70 Gy,altered fractionation especially the hyperfractionated accelerated radiotherapy could give a higher BED to the tumor during a shorter period,hyperfractionated radiotherapy could give a lower BED to normal tissues,and hyperfractionated radiotherapy with split course could give higher BED to the tumor while lower BED to normal tissues.Conclusions The variation of BED in different radiotherapy processes can be shown clearly by linear-quadratic mode.It can be simple and shortcut through mathematical models for the evaluation of different radiotherapy plan,on clinical symptomatic selection play a guiding role in tumor therapy.

Objective:To observe the clinical efficacy of calcium dobesilate combined with valsartan in the treatment of IgA ne-phropathy. Methods:Totally 58 cases of IgA nephropathy were randomly divided into the treatment group and the control group. The control group enrolled 29 cases given valsartan 160 mg · d-1 . The treatment group included 29 cases treated with calcium dobesilate 500 mg·time-1 ,tid,and valsartan 160 mg·d-1 . After 6 months, the following indicators were observed, such as blood pressure,fi-brinogen,urea nitrogen,serum creatinine,blood uric acid,and 24-hour urinary ( Upro) . Results: After 6 months, UA and Upro of the two groups were significantly declined than those before the treatment(the control group P<0. 05,the treatment group P<0. 01). Upro of the treatment group was declined from (1. 48 ± 0. 84) g/24h to (0. 41 ± 0. 22) g/24h,and there was statistical significance com-pared with the control group (P<0.05). BUN, Scr and FIB were decreased significantly(P <0.05),while no significant change showed in those in the control group after the treatment. Conclusion:Calcium dobesilate combined valsartan can effectively reduce Up-ro and improve renal function in IgA nephropathy.

ObjectiveTo observe the dynamic changes of blood perfusion and hypoxic status by CT perfusion imaging and hypoxia imaging in patients with non-small cell lung cancer (NSCLC) after treatment with recombinant human endostatin (RHES). MethodsA total 15 patients with NSCLC were randomly divided into treatment group (n = 10) and control group (n = 5). The patients in treatment group continuouly received the treatment with RHES (7.5 mg/m2) by intravenous infusion for ten days, and CT perfusion imaging and hypoxia imaging were performed at day 1, 5 and 10,respectively. The time window' was observed with the blood perfusion status and hypoxic changes.ResultsIn the treatment group, capillary permeability surface (PS) and tumor to normal tissue (T/N) were firstly decreased, and then increased. Their lowest points occurred at about the fifth day. PS showed statistical significance compared with the first day (q1.5 = 12.05, P＜0.01 ) and no significance compared with the tenth day(q10.5 = 2.79, P=0.69), while T/N showed a significant difference between above time points (q1.5 = 73.81, q10.5 = 20.6, P = 0.00).Blood flow (BF) was firstly increased, and then decreased.Its highest point appeared at about the fifth day with statistical significance compared with the first and tenth day (q1.5 = 12.29, q10.5 = 10.48, P＜0.01 ). All the PS,BF and T/N between the fifth day in treatment group and the control group showed statistically significance (all P ＜ 0.01 ).Conclusions The time window of recombinant human endostatin improving blood perfusion and hypoxic status in non-small cell lung cancer is within about one week after administration.

Objective To investigate the role of expression in the differential diagnosis of thyroid follicular carcinoma and follicular variant of papillary carcinoma. Methods Seventy cases of thyroid lesions (including 15 cases of follicular adenomas, 15 cases of adinomatous goiters, 30 cases of papillary carcinomas and 10 cases of follicular carcinomas) were collected, and CD10 expression was detected by means of immunohistochemistry in above thyroid lesions. Results Seven of 9 cases of follicular variant of papillary carcinoma were CD10 positive (77.8), and 8 of 10 cases of follicular carcinoma were CD10 positive (80.0). However, CD10 was negative in all cases of non-follicular variant of papillary carcinoma, follicular adenoma, adinomatous goiter and normal thyroid tissue. Conclusion The detection of CD10 expression is useful to the differential diagnosis of thyroid follicular carcinoma and follicular variant of papillary carcinoma.

OBJECTIVE: To evaluate the therapeutic effect of Zangfukong suppository on the experimental vaginitis.METHODS:The experimental rats were equally assigned to 6 groups: normal control group,model control group,gyno-daktarin(0.12 g?kg-1) group,three Zangfukang groups(0.33 g,0.17,and 0.08 crude drug? kg-1).Candida albicans solution was injected into the vigina of the estrous rats to establish colpomycosis model.The effect of Zangfukang suppository on the infection rate of candida albicans was observed.The bacterial vaginitis model was established by injecting the mixture bacteria of Neisseria gonorrhoeae,staphylococcus aureus and escherichia coli into the vagina of rats,and the effect of Zangfukang suppository on the gonococcal infection rate.RESULTS: After local application of Zangfukang suppository for 7 consecutive days for treatment of colpitis mycotica of rats,the infection rates of candida albicans were significantly lower in medium-dose and high-dose groups than in the model control group(P

AIM: To investigate the effect of roxithromycin on the NF-?B activity,the airway inflammation and bronchial hyperresponsiveness of asthma rats.METHODS: Thirty male adult Sprague-Dawley rats were randomly divided into the control group(Group C,n=10),asthma group(Group A,n=10) and roxithromycin group(Group R,n=10).The asthma model was induced by ovalbumin and Al(OH)3.The airway reactivity was detected and then rats in each group were sacrificed after 24 hours for the last provocation.The concentrations of IL-4,IL-5 and IFN-? in bronchoalveolar lavage fluid(BALF) were measured by ELISA,and the activity of NF-?B protein in bronchial epithelium was detected by immunohistochemistry.RESULTS: Compared with Group C,the airway reactivity in Group A was increased(P

Objective To design an appropriate preoperative questionnaire in Chinese bariatric surgery.Methods Bariatric surgery center carried out laparoscopic bariatric operation from January 2010,preoperative questionnaire before the operation were supplied.Till January 2014,a total of 401 patients replied to the survey.The questionnaires were designed through three stages:translated from the Cleveland Clinic (USA) and applied in 30 patients for the first survey; adjustments and changes to the contents of the questionnaire for 90 patients according to Chinese conditions in the second phase; in the third stage,the third edition questionnaire was used in 281 patients.The satisfaction degree of the doctors and patients about the content of the questionnaire was evaluated.Results For the three versions of the questionnaire,the doctor satisfaction rate was 73.3％,86.7％ and 96.8％.Patients' satisfaction rate of three versions were 30.0％,40.0％,76.9％,not satisfactory rate was 20.0％,11.1％,2.8％.Conclusions The current preoperative questionnaire includes 11 categories with 101 items of the third edition,doctors and patients satisfaction rate is higher,and it is suitable for Chinese bariatric surgery.

Objective To investigate the influence of treatment table with C-arm and immobilization device in IMRT planning accuracy, and to explore methods to solve this problem.Methods The solid water slabs and the ionization chamber was scanned and images were transmitted to the treatment planning system (TPS).Beam parameters in the TPS were set with 6 MV beam and 100 MU exposures were used.Measurements were performed at two different sizes of 5 cm×5 cm and 10 cm×10 cm.The gantry was rotated through angles from 0° to 180° with measurements taken at 5° increments.The measure point was set at center of the ionization chamber' measure point, which was also the central point of planning.The center axis of Matrix was aligned with the center of couch and was irradiated in accordance with the same conditions.OmniPro-FmRT software was used to compare and analyze the dose distribution of the radiation field of measurement and the treatment planning system output.Using the function of add constant value to find the appropriate coefficient to improve the plan total dose.The dose distributions for each beam in IMRT plans which was increased or unincreased total dose were measured for 6 patients with pelvic tumor respectively.Results In radiation therapy, treatment couch and immobilization device may attenuate radiotherapy dose.The impact of the incident range from 65°-70° and 115°-125° were the largest.Increasing the total dose of the treatment plan by 2％ could compensate the attenuation of the treatment table and immobilization device.Conclusions In radiation therapy, the impact of the incident range from 65°-70°, 115°-125° and another side of 290°-295° and 230°-245° should be avoided.The attenuation should not be neglected in the TPS and dose should be compensated by adjusting beams' MU.