Objective To investigate the dose-response of micronuclei (MN) frequency in the lymphocytes irradiated with or without combination of α-particles and γ-rays. Methods Human lymphoblast cells HMy2.CIR were irradiated with 0 - 1 Gy of α-particles,0 - 5 Gy of γ-rays,and 0.025 -0.5 Gy of α-particles followed by different doses of γ-rays,respectively.The micronuclei (MN) in the irradiated cells were measured with the cytokinesis block technique,and the dose-responses of MN were established under different irradiation conditions.Results For γ-ray irradiation,the dose-response of MN was well-fit by the linear-quadratic model with an equation Y =c + αD + βD2.For α-particle irradiation,the MN induction increased linearly with the dose less than 0.250 Gy. But when the dose of α-particles increased continually,the dose-response curve bended and could be well fit with the BaD model Y =c + αD + σ[ 1 - exp( - δD) ] exp( - βD) where radiation-induced bystander effect (RIBE) was indicated.For the combined exposure,the dose-response of MN was similar to that of γ-irradiation when the dose of α-particles was lower than 0.1 Gy,but it was similar to that of α-irradiation when the dose of α-particles was higher.When the dose of α-particles was 0.2 and 0.5 Gy,MN induced by the mixed radiation were significantly higher than the sum of corresponding irradiation alone ( t =5.22 - 11.86,P ＜ 0.05 ).Conclusions The radiation damage of α-particles differs from that of γ-rays,where RIBE may be involved.The combination irradiation of α-particles and γ-rays has a synergistic effect on radiation damage of lymphoblast cells.

Adrenal tuberculosis is still the main cause of primary adrenal insufficiency (Addison Disease) in China. A case of bilateral adrenal tuberculosis without PAI symptoms was admitted to Department of Urology, Shanxi Provincial People’s Hospital. Pathological report showed adrenal tuberculosis. We present an overview and discuss how to diagnose early adrenal tuberculosis and reduce misdiagnosis rate so as to preserve residual adrenal function to the greatest extent.

Objective To investigate the prevalence of low T3 syndrome in patients with acute myocardial infarction(AMI) and explore the effect of low T3 syndrome on outcome of AMI.MethodsThree hundred and thirty-eight patients with AMI admitted to cardiac care unit(CCU) underwent examinations of thyroid function and cardial ultrasound,and were further categorized according to thyroid hormone profile.The records of noninvasive bi-level positive airway pressure(BiPAP)ventilation utilization,length of hospital stay,mortality during hospitalization were evaluated,and the related factors were analysed.ResultsOne hundred and thirty-nine of the 338 patients(41.12%) with AMI complicated with low T3 syndrome.Free triiodothyronine(FT3) was the independent influential factor for length of hospital stay.Low FT3 was significantly correlated with noninvasive BiPAP ventilation utilization and mortality during hospitalization.The average time of follow-up was(21.4?8.1) months.It was revealed by multivariate Cox regression analysis that FT3 was the chief predictor for cumulative death(risk ratio,4.25;95% confidential interval,2.30-7.87),followed by age and left ventricular ejection fraction.ConclusionThe recognition of AMI complicated with low T3 syndrome plays an important role in predicting the disease severity and outcome.

OBJECTIVE To investigate the HIV infections states in tumor patients for clinical diagnosis,treatment and to prevent HIV infection in the tumor hospital.METHODS The result of HIV detection in tumor patients from Dec 2000 to Aug 2006 was analyzed by the review statistics analysis.RESULTS Totally 48 101 tumor paients were detected,and the number of tumor patients with positive HIV antibody result was 51(0.106%).Among the positive patients there were 21 cases with blood transfusion history,14 cases with blood donating experience,2 cases with both these two kinds of experiences and 14 cases without the two kinds of experiences.Their rate was separately 41.0%,27.5%,4.0% and 27.5%.Most of the HIV positive patients had no clinical synptoms.CONCLUSIONS The HIV positive rate of patients with blood transfusion or blood donating is significantly higher than the patients without these experiences.The routine detection for the HIV before the operation,blood transfusion or other traumatic detection is very necessary.

OBJECTIVETo investigate the expression of MN/CAIX in patients with renal cell carcinoma (RCC) and assess the value of MN/CAIX in the diagnosis of RCC.

METHODSRT-PCR was employed to detect MN/CAIX mRNA in the carcinoma tissue and peripheral blood of 62 patients with RCC, using normal renal tissue and peripheral blood sample from 32 patients without RCC as control. Immunohistochemistry was used to detect MN/CAIX protein in the tissue specimens of clear cell RCC (n=36), non-clear cell renal neoplasm (n=17) and normal kidney (n=16).

RESULTSThe positivity rate of MN/CAIX mRNA was 82.3% (51/62) in renal carcinoma tissues and 54.8% (34/62) in the peripheral blood from patients with RCC, significantly higher than the rates in the control cases (P<0.05). In cases of clear cell renal cell carcinoma, the positivity rate of MN/CAIX mRNA was 98% (49/50) in the carcinoma tissues and 66% (33/50) in the peripheral blood, significantly higher than the rates in cases of non-clear cell type of RCC (P<0.05). Immunohistochemistry showed a significantly higher positivity rate of MN/CAIX protein in clear cell RCC tissues [97.2% (35/36)] than in non-clear cell renal neoplasm and normal renal tissues (P<0.05).

CONCLUSIONMN/CAIX is specifically overexpressed in RCC, especially in clear cell RCC, suggesting its potential in the diagnosis and prognostic and therapeutic evaluation of RCC.

Adult ; Aged ; Antigens, Neoplasm ; genetics ; metabolism ; Biomarkers, Tumor ; Carbonic Anhydrase IX ; Carbonic Anhydrases ; genetics ; metabolism ; Carcinoma, Renal Cell ; diagnosis ; metabolism ; Female ; Humans ; Kidney Neoplasms ; diagnosis ; metabolism ; Male ; Middle Aged ; RNA, Messenger ; genetics ; metabolism ; Young Adult

Objective To evaluate the effect of myocardial viability on left ventricular function after elective revascularization in patients with myocardial infarction by 99Tcm-MIBI and 18F-FDG dual-isotope simultaneous acquisition (DISA) myocardial perfusion-metabolic imaging. Methods Ninety-one patients clinically confirmed of myocardial infarction underwent DISA imaging. Based on the results of echocardiography, the patients were divided into heart failure group (group A) and normal cardiac function group (group B). After PCI, left ventricular function was measured by echocardiography in 1, 3 and 6 months. The t-test and χ2-test were used to compare the difference between the two groups using SPSS 13.0. Results The average number of diseased segments by myocardial perfusion imaging was 9.8±3.5 and 5.4±2.6 in groups A and B, respectively (t=6.87, P<0.01). The average number of diseased segments by myocardial metabolic imaging was 7.5±3.4 and 4.6±2.8 in groups A and B, respectively (t=4.46, P<0.01). There were 173 segments with viable myocardium (173/458: 37.8%) in group A and 188 segments with viable myocardium (188/307: 61.2%) in group B (χ2=40.61, P<0.001). The summed perfusion score (SPS), summed metabolism score (SMS) and summed difference score (SDS=SMS-SPS) were 28.43±11.86 vs 21.36±9.54, 20.17±8.52 vs 15.19±5.74 and 0.39±3.17 vs -12.72±4.55, respectively in groups A and B (t=3.15, P<0.01; t=3.32, P<0.01; t=15.59, P<0.01). The mean change of LVEF (ΔLVEF) and the mean change of left ventricular end-diastole dimension (ΔLVEDd) of the patients with more than 4 viable myocardial segments in group A were significantly more than those in group B( (12.81±2.62)% vs (5.90±1.91)%, t=16.33, P<0.001; (-13.13±4.20) mm vs (-7.75±2.31) mm, t=6.86, P<0.001). However, the ΔLVEF and ΔLVEDd of the patients with less than 4 viable myocardial segments in group A were significantly less than those in group B (t=3.25, P<0.01; t=4.92, P<0.001). Conclusion The amount of viable myocardium in infarct myocardium is an important factor for left ventricular function recovery after elective revascularization.

OBJECTIVETo study the feasibility and effect of Blunt esophageal denudation without thoracotomy in the treatment of cervical esophageal carcinoma with laryngeal function preservation.

METHODSThe data of 28 patients with cervical esophageal carcinoma, collected from Aug. 1997 to Nov. 2005, were investigated retrospectively.

RESULTSAll the 28 patients were diagnosed as cervical esophageal squamous cell carcinoma. Among them, 12 patients underwent surgery (surgery group), while the other 16 patients underwent surgery plus radiation therapy preoperatively or postoperatively (multimodality therapy group). No uncontrolled intraoperative and postoperative hemorrhage and tracheal tear occurred. The incidence of complications was 21.4% (6/28), including cervical anastomotic leakage in 2 patients and recurrent laryngeal nerve injury in 4 patients. The overall 5-year survival rate was 50.3%. The 5-year survival rate was 25.7% in surgery group and 66.1% in multimodality therapy group, and the difference between two groups was statistically significant (chi(2)=4.07; P=0.0438).

CONCLUSIONSBlunt esophageal denudation without thoracotomy in the treatment of cervical esophageal carcinoma with larynx function preservation is possible. Combined with radiotherapy preoperatively or postoperatively, the survival time in patients with cervical esophageal carcinoma is able to be prolonged.

Adult ; Aged ; Aged, 80 and over ; Esophageal Neoplasms ; surgery ; Esophagectomy ; methods ; Esophagoplasty ; Feasibility Studies ; Female ; Humans ; Male ; Middle Aged ; Neck ; Retrospective Studies

OBJECTIVE: To explore a simple and accurate method for localization of upper airway obstruction in patients with obstructive sleep apnea-hypopnea syndrome (OSAHS) and provide instructions for surgical treatment. METHOD: Fifty OSAHS patients confirmed by PSG underwent acoustic rhinometric and pharyngometric assessment by Eccovision. The parameters were recorded, including nasal minimal cross-sectional area (NMCA), distance of MCA from the nostril (DCAN), minimum cross-sectional area at the nasal valve(MCA), nasal resistance (NR) and nasal volume from 0 to 6 cm from the nostril (NCV), as well as pharyngeal cross-sectional area (CSA) and volume from 4.8 to 15.0 cm. The sensitivity and specificity of acoustic rhinometry and pharyngometry on localization of airway obstruction was determined by a comprehensive imaging and endoscopic study. RESULT: In 50 cases with severe OSAHS, NMCA, DCAN, MCA, NCV, NR were (0.61 +/- 0.35) cm2, (2.06 +/- 0.12) cm, (0.87 +/- 0.12) cm2, (9.24 +/- 2.31)cm3 and (0.51 +/- 0.32)kPa/(L x min), respectively. Pharyngeal CSA and volume were statistically significantly lower than that in control group (P < 0.01). The value of DCAN was (2.06 +/- 0.12) cm, (9.50 +/- 4.08) cm, (13.10 +/- 2.52) cm in type I II, III patient, respectively. Compared with the control group, the difference was statistically significant. CONCLUSION Acoustic rhinometry and pharyngometry is a simple and safe method in localization of airway obstruction in patients with OSAHS.
Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Nasal Cavity ; physiopathology ; Nasopharynx ; physiopathology ; Rhinometry, Acoustic ; Sleep Apnea, Obstructive ; physiopathology ; Young Adult

OBJECTIVETo achieve high expression of human renal cell carcinoma-associated antigen G250 in Escherichia coli.

METHODSThe gene fragments encoding the protein obtained by PCR was cloned into prokaryotic expression vector pET32a(+) and expressed in E. coli Rosseta. The immunogenicity of the recombinant protein was evaluated by Western blotting.

RESULTSThe plasmid pET32a(+)/G250 was constructed and expressed in E. coli Rosseta successfully. Western blot analysis showed that the recombinant protein could be specifically recognized by monoclonal antibody M75.

CONCLUSIONEfficient G250 expression is achieved in prokaryotic expression system, which may facilitate further functional study of the protein and its monoclonal antibody preparation.

Antibodies, Monoclonal ; immunology ; Antibody Specificity ; immunology ; Antigens, Neoplasm ; genetics ; immunology ; metabolism ; Biomarkers, Tumor ; genetics ; immunology ; metabolism ; Blotting, Western ; Carbonic Anhydrase IX ; Carbonic Anhydrases ; genetics ; immunology ; metabolism ; Cloning, Molecular ; Escherichia coli ; genetics ; Gene Expression ; Humans ; Recombinant Fusion Proteins ; genetics ; immunology ; metabolism

OBJECTIVETo investigate the viral pathogens of acute lower respiratory tract infection (ALRTI) in hospitalized children from East Guangdong Province of China and the relationship of the pathogens with age and seasons.

METHODSThe nasopharyngeal aspirates samples obtained from 345 hospitalized children with ALRTI were investigated for respiratory syncytial virus (RSV), human bocavirus (HBoV), human metapneumovirus (hMPV), influenza virus types A and B, rhinovirus, parainfluenza virus types 1 and 3 and adenovirus by PCR.

RESULTSViral pathogens were detected in 178 patients (51.6%). RSV was the most frequent (19.3%). Novel viruses hMPV (3.2%) and HBoV (3.2%) were found. A highest detection rate (61.9%) of virus was found between January to March. The infants aged 1 to 6 months showed a higher detection rate (71.3%) of virus than the other age groups. The detection rate of viral pathogens was 72.6% in children with bronchiolitis, followed by asthmatic bronchitis (70.0%) and bronchial pneumonia (44.6%).

CONCLUSIONSRSV remained the leading viral pathogens in children with ALRTI in East Guangdong of China. Novel viruses HBoV and hMPV were also important pathogens. The detection rate of viral pathogens was associated with seasonal changes and age. Different respiratory infectious diseases had different viral detection rates, with highest detection rate in bronchiolitis cases.

Acute Disease ; Adenoviridae ; isolation & purification ; Child, Hospitalized ; Child, Preschool ; Female ; Humans ; Infant ; Male ; Metapneumovirus ; isolation & purification ; Nasopharynx ; virology ; Orthomyxoviridae ; isolation & purification ; Respiratory Syncytial Virus, Human ; isolation & purification ; Respiratory Tract Infections ; virology ; Rhinovirus ; isolation & purification ; Seasons