Objective To observe the radiosensitizing effect of docetaxel on SPC-A1 lung cancer cell line and probe its radiosensitizing mechanisms in vitro. Methods After exposed to docetaxel, SPC-A1 lung cancer cells were irradiated with 137Cs ?-rays radiator at single dose of 2 to 10 Gy. For each radiation dose docetaxel-treated cultures and non-treated control cultures were irradiated simultaneously. The cell survival faction (SF) was evaluated using a standard colony-forming assay. Then the effects of docetaxel on the cell cycle and intracellular reactive oxygen species (ROS) were assayed so as to explore radiosensitizing mechanisms. Results The enhanced radiosensitivity of SPC-A1 lung cancer cells has been observed. The sensitivity enhancement ratio (SER) at 37% survival level were 1.10 and 1.36 for 24 and 48 h pretreatment of docetaxel at dose of 1.25?10-10 mol/L, while it were 1.23 and 1.43 at dose of 2.5?10-10 mol/L for 24 and 48 h pretreatment, respectively. The dose of docetaxel, which can sensitize the cells, could increase the intracellular production of ROS for nearly 2-3 times and did not result in any cell cycle redistribution. Conclusions This study demonstrated that docetaxel is synergistic with radiotherapy to lung cancer cell in vitro. ROS may play a substantial role in the process docetaxel-induced radiosensitization.

Objective To analyse the clinical characteristics of drug-fever caused by ?-lactams antibiotics and provide the basic information for diagnosis of patients with drug-fever,and profile the drug fever due to antimicrobil agent.Methods In this study,64 hospitalized cases between 2000 and 2006 were enrolled who had drug-fever during antiinfective treatment.Results Most medications can cause fever,so as ?-lactams Antibiotics,with or without concomitant clinical manifestations.The fever could arise from the drug's pharmacologic action,its effects on thermoregulation,a local complication following parenteral administration,or an idiosyncratic response.Patients with drug-fever caused by ?-lactams,their temperature droped to normal level while ?-lactams discontinued for about 24h~48h,and without any linger effect.Conclusions Drug-fever is mainly caused by ?-lactams antibiotics like piperacillin sodium.It is important that doctors should bear the drug-fever in mind to avoid misdiagnosis.

Purpose: To explore the relationship between the effect of docetaxel inducing apoptosis of non-small-cell lung cancer cell and intracellular level of reactive oxygen. Methods: SPC-AI lung cancer cells were treated with 10 -8mol/L docetaxel for 24 hours to observe the apoptotic morphological change under the electromicroscope and fluorescence microscope in ritro. The treated cells were harvested to analyze the cell cycles using flow cytometry and to estimate the intracellular reactive oxygen levels by staining with 2', 7-dichlorodihydrofluorescein diacetate and dihydroethidine. Results: After SPC-AI lung cancer cells were exposed to 10 ~ mol/L docetaxel for 24 hours, the typical apoptotic morphological changes were observed under the electromicroscope and fluorescence microscope. There was a higher reactive oxygen level in docetaxe-treated cells group than in control group. After 24 hours docetaxel exposure, there was a significant G2 ~'M phase arrest of SPC-AI lung cancer cells. Conclusions: Docetaxel can induce apoptosis in SPC-AI lung cancer cells through the mechanism of G2 ~ M phase arrest and by elevating intracellular level of reactive oxygen.

Objective To investigate the important role of bronchial provocation test with hypertonic saline and induced sputum in the diagnosis and treatment of chronic nonproductive cough by assessing its feasibility and the side effects which may occur during the procedure.Methods The diagnosis procedure was based on the anatomical protocol for diagnosing chronic nonproductive cough,howerer,hypertonic saline bronchial provocation test and induced sputum were conducted for unconfirmed 38 pafients who suffered chronic congh.Results 23(23/38,60.5%)patients with airway hyperresponsiveness,the forced expiratory volume in one second(FEV1)was decreased 27%?5.8)%,Side effects occurred in 3 patients(3/38,7.8%).Appropriate sputum samples were obtained after hypertonic saline challeng,The percentage of eosinophi1 counts in induced sputum was high in 24 patients(24/38,63.2%),including cough variant asthma(CVA)(17/23,73.9%)and eosinophilic bronchitis(EB)(7/38,18.4%).After treatment,the percentage of eosinophi1 counts in induced sputum of patients was significantly reduced in CVA and EB.Conclusion Bronchial provocation test with hypertonic saline and induced sputum were an effective method for diagnosing chronic nonproductive cough and little side effects occurred during the procedure.

Objective The purpose of this study was to describe the clinical and CT features in Cryptogenic organizing pneumonia(COP),and method of managemant.Methods We reviewed characteristics of clinical,laboratory,chest CT and pulmonary function test of 6 patients with histologically proven COP,and evaluated their therapeutic response to corticosteroids.Results Most patients of 6 cases manifested as a persistent nonproductive cough,exerting dyspnea,pyrexia,malaise,and weight loss clinically.Less common symptoms include pleuritic chest pain and hemoptysis.Chest CT manifestations included ground-glass opacity,consolidation,diffusing reticular infiltration of parenchyma,pleural effusion,cavitation and migration.The patients had high level of peripheral WBC number,erythrocyte sedimentation,and C-reactive protein.Pulmonary function tests showed a impairment of restrictive pattern and diffusion capacity.All but one Patients responsed well to corticosteroids.Conclusions COP is a rapidly developing pneumonia-like illness characterized by lung inflammation,The clinical doctor must always be aware of the full view of COP so as to achieve successful diagnosis.Most of the patient can recover with corticosteroids therapy.

Objective To evaluate the clinical features and various diagnostic methods for sarcoidosis.Methods The data of 28 cases with sarcoidosis confirmed by pathology were reviewed and analized,and different diagnostic methods were compared.The disease was evaluated by regular serological tests,chest X ray film,chest high resolution computed topography(HRCT),bronchofibroscopy,and pulmonary function test.Results These patients shared a typical clinical presentation,consisting of dyspnea,cough,subskin nodes,enlargement of peripheral lymphnodes and splenomegaly.Laboratory test revealed elevated serum blood sedimentation,alkali phosphatase,Angiotensin-converting,and urine calcium.The saricoidosis was confirmed by pathological biopsy for bronchial mucosa,lung tissues,peripheral lymphnodes,subskin nodes biopsies and spleen.HRCT showed its superiority to traditional X ray film examination in fingding early staging chest sarcoidosis.Conclusions Chest HRCT and bronchopulmonary biopsy through bronchofibroscopy possess significant clinical value for sarcoidosis diagnosing and staging.And extropulmonary lessions biopsy also plays a complementary role to some extent.

BACKGROUNDTo investigate the expression of aquaporins in human pulmonary adenocarcinoma cell line SPC-A-1.

METHODSThe expressions of aquaporin 1, aquaporin 3, aquaporin 4, and aquaporin 5 in mRNA level and their locations were determined in cell line SPC-A-1 respectively by RT-PCR and immunohistochemistry.

RESULTSThe immunohistochemical stain showed aquaporin 3 and aquaporin 5 located on the membrane of SPC-A-1 cell, but no positive stain of aquaporin 1 and aquaporin 4 was observed. Both aquaporin 3 and aquaporin 5 mRNA expressed in SPC-A-1 cell line, and the expression level of aquaporin 5 mRNA was significantly higher than that of aquaporin 3 mRNA ( P < 0.01). Aquaporin 1 and aquaporin 4 mRNA did not express in SPC-A-1 cell line.

CONCLUSIONSAquaporin 3 and aquaporin 5 express in SPC-A-1 cell, and their roles in water transport of SPC-A-1 cell should be further investigated.