Aim To investigate the effects of K + channel blockers on arsenic trioxide-induced HeLa cell death. Methods Viability of HeLa cells was assessed by mitochondrial dehydrogenase activity using colorimetric MTT assay and the voltage-dependent K+ currents were recorded by using patch-clamp rest living cells after As2 O3 24 h-incubation showed significant increase of K + currents densities. At + 80mV, the densities of K+ currents (61 ± 18) pA/10 pF (n = 8) in As2O3 24 h-incubation group were significantly more than that in the control group (38 ± 10) pA/10 pF (n = 8, P ＜ 0. 05 ). The HeLa cells were prevented partially from As2 O3-induced cell death by co-application for 24 h with typical voltageeffects on HeLa cells. Conclusion Chronic treatment with As2 O3 increased voltage-dependent K+currents in HeLa cells and the cell death induced by As2O3 was reduced partially by voltage-dependent K +channel blockers, 4-aminopyridine or tetraethylammonium.

Objective To explore the method of total nasal reconstruction when the forehead skin for expanding is unavailable.Methods According to the principle of total nasal reconstruction,total nasal scar and deformity were repaired with expanded random forearm falp.All the expanders were placed in flexor side of forearm.The incision sides were placed in proximal,distal,or lateral part of the forearm according to different pedicles.After expansion,the nares were enlarged,eversion of ala nasi corrected,the contracture scars sufficiently released,and the size and shape of the reconstructive nose designed according to face size.The scar of nasal dorsum and capsule of the expanded flap could be used for reconstructing nasal dorsum.Donor sides could be sutured directly,the pedicle could be cut 3 weeks later.Results All the flaps survived with good appearances,and 3 of the 15 cases with proximal,11 with distal,and 1 with lateral pedicle.The effect of distal pedicle group was better than that in proximal and lateral pedicle group because of comfortable posture longer pedicle,and providing more tissue for reconstruction.Conclusions Total nasal reconstruction with expanded random forearm flap is an option when the forehead skin for expanding is unavailable.

Objective To investigate the awareness and trainning needs of health management knowledge in primary healthcare professionals in Beijing.Methods Six hundred primary healthcare staff from Daxing,Fangshan,Miyun,Pinggu and Huairou District of Beijing were selected in 2012 through muhiphase random sampling method and required to complete a standardized questionnaire.The survey included the average awareness rates of health management(tobacco,body weight and alcohol consumption control and daily physical exercises),the rates of application and conception awareness of risk assessment tools of chronic diseases,the awareness rates of normal levels of blood pressure and serum glucose as well as training needs.Differences in different regions were analyzed.Chi-square test was used for data analysis.Results The average awareness rates of tobacco,body weight and alcohol consumption control and daily physical exercises were 94.1％ (513/545),95.3％ (522/548),94.0％ (515/548) and 85.9％ (470/547),respectively.However,the rates of application and conception awareness of risk assessment tools of chronic diseases were only 55.1％ (295/535) and 59.8％ (329/550),respectively.Those who knew the normal levels of blood pressure and serum glucose accounted for 85.4％ (475/556) and 92.4％ (514/556),respectively; although only 23.6％ (131/556) and 21.2％ (118/556) were completely familiar with the major risks of these conditions.About 57.4％ (308/537) or 56.7％ (305/538) participants reported urgent needs for health education on diabetes and hypertension management.Conclusion The awareness of health management of primary healthcare professionals in rural areas of Beijing remains lower and may need to be raised by education or training.

Objective To learn current status of health management provided by primary health professionals working in rural areas of Beijing.Methods Health professionals in township hospitals in Beijing were selected by multi-phase random sample method in 2012 and surveyed by a standardized questionnaire to gathering the data on various health management contents,including health checkup,chronic disease management et al,the action location,its collaborative persons and sectors.Statistics description and inference were conducted to describe and compare the distribution of health management implementation across rural areas by descriptive methods and test,respectively.Results Nearly 66.3％ (321/484) of subjects provided health check-up,and 19.1％ (92/481)involved in follow-up study of mental diseases.The main targets population of health management were chronic diseases and the elderly,with response rate of 44.7％ (214/479) and 38.0％ (182/479),respectively.Health check-up,health education and follow-up of chronic diseases were performed in 62.1％ (298/480),52.4％ (251/479) and 42.8％ (206/481) of the township health centers.About 66.1％ (292/442) township health centers had cooperation with general practitioners; however,cooperation with administrative personnels was only 10.6％ (47/443).More than 41.4％ (201/463) township health centers cooperated with community administrative sectors,and cooperation with the propaganda department was only 10.6％ (49/464).The statistical difference across regions shows in the following,including health management action (health checkup,chronic disease patients following-up,et al),the target population covered (youth,elder person,children,and chronic disease patients),health management location(health checkup,education and chronic disease patients following-up in township hospital and village clinic),cooperation with General Practitioner.Conclusions Our results suggest that the actual situation on health management service in Beijing rural areas and the standards of public health equalization of China are still disjoined,even difference exists across regions.In order to improve the health management service quality,we should strengthen the health management personnel training,increase the general practitioner in proportion,establish the performance evaluation mechanism,increase governmental finance to support those service.

OBJECTIVETo investigate the clinical application of expanded flap based on cutaneous branch of transverse cervical artery for reconstruction of cervical cicatricial contracture.

METHODSBased on the clinical anatomy of cutaneous branch of transverse cervical artery flap, we design the corresponding subclavicular area for expansion. The incision was usually located at the anterior axillary fold, 5-8 cm in length. The expander was implanted under the deep fascial layer, without injury of the vascular pedicle. Fixation sutures were put about 1 cm apart from the incision to prevent the expander from transposition and exposure. After expansion, the cervical cicatricial contracture was excised and released. According to the defect, the expanded flap based on the cutaneous branch of transverse cervical artery was designed, with the pedicle located at the posterior margin of sternocleidomastoid and 1. 8 cm above median point of clavicle. "S" shape incision was made at the location of vascular pedicle. Subcutaneous dissection was performed 1.5 cm in width along the incision on both sides. Then the flap was harvested under the deep fascial layer and rotated to cover defect without tension. It was not necessary to dissect the vascular pedicle further. The defect at donor site was closed directly.

RESULTS17 cases were treated with the island flap. The contracture of the cervical scar was corrected completely with aesthetic appearance.

CONCLUSIONSExpanded flap based on cutaneous branch of transverse cervical artery has reliable blood supply. It' s an ideal flap for the treatment of cervical cicatricial contracture.

Arteries ; Cicatrix ; surgery ; Clavicle ; Contracture ; surgery ; Dissection ; methods ; Fasciotomy ; Humans ; Neck ; blood supply ; Neck Muscles ; anatomy & histology ; Surgical Flaps ; blood supply

Amifostine ; therapeutic use ; Animals ; Head and Neck Neoplasms ; radiotherapy ; Humans ; Oral Health ; Radiation Injuries ; etiology ; prevention & control ; therapy ; Radiation-Protective Agents ; therapeutic use ; Radiotherapy ; adverse effects ; Radiotherapy, Conformal ; Salivary Glands ; radiation effects ; Salivation ; radiation effects ; Submandibular Gland ; surgery ; transplantation ; Xerostomia ; etiology ; prevention & control ; therapy

OBJECTIVE:To make an investigation on the quality of decoctions of traditional Chinese medicine prepared by decocting device and fire heating decocting method.METHODS:To compare the chemical compositions in decoctions of Salvia miltiorrhiza Bunge prepared by above-mentioned two methods and to take the contents of danshensu and protocatechualdehyde as indices,both of which were determined by HPLC.RESULTS:There were no evident difference between the two methods in extracting chemical compositions.In addition,the contents of danshensu and protocatechualdehyde prepared by decocting device were as2.97times and5.6times as those prepared by fire heating decocting method respectively.CONCLUSION:The prepa?ration of decoction of Saliva miltiorrhiza Bunge by decocting device can double the effective constituents.This provides scien?tific basis for making rational use of herbs.

OBJECTIVE:To study the immunosuppressive chemical constituents from the n-butanol extract of the debark root of Tripterygium wilfordii hook.f.METHODS:Several compounds were isolated from the n-butanol extract by columns of silica gels and Sephadex LH-20,their structures were identified by NMR,MS spectral analysis and comparing with standard substances on TLC,and the immunosuppressive activity was determined.RESULTS:One of the compounds was identified as emodin,an anthraquinone,it had marked immunosuppressive effect on animal.CONCLUSION:Emodin is obtained from the plants of Tripterygium wilfordii hook.f.for the first time.

Objective To detect the expression of E-cadherin and ?-catenin in breast carcinoma and analyze the relationship between E-cadherin and ?-catenin and the clinicopathological features. Methods The expression of E-cadherin and ?-catenin in breast cancer, paracarcinoma breast tissue, simple mastoplasia and atypical mastoplasia were detected by immunohistochemical method and the results were compared. Results The abnormal expression rates of E-cadherin and ?-catenin in breast cancer tissue were 51.9% and 61.1 %,respectively. Abnormal expression of E-cadherin was significantly correlated with histological grade. Abnormal expression of ?-catenin was significantly correlated with TNM staging, axillary lymph nodes metastasis and postoperative distant metastasis. COX multiple factor analysis showed that neither E-cadherin nor ?-catenin expression was an independent indicator for the prognosis of breast cancer. Conclusions Abnormal expressions of E-cadherin and ?-catenin are correlated with occurrence and development of breast carcinoma. Abnormal expressions of E-cadherin and ?-catenin are good indicators to judge invasion and metastasis of breast carcinoma.

Objective To investigate the effect of propofol anesthesia on stress response and immune function of laproscopic cholecystectomy.Methods Corticosterone,glucose,complement concentrations in plasma of 20 ASAⅠ～Ⅱ patients under propofol combined anesthesia undergoing elective laproscopic cholecystectomy,were respectively determined before anesthesia,operation,gallbladder ablation and after de-intubation.Results After anesthesia,blood glucose increased while C3 and CH50 decreased gradually(P