OBJECTIVE To investigate the appropriate time of replacing urine-collecting bags in allogenic kidney transplantation recipient with indwelling catheter.METHODS A total of 52 patients,accepted allogenic kidney transplantation from Jan to Dec 2006,were investigated.At 2 to 8 days after operation,the urine was collected for bacterial culture and then the urine-collecting bags changed.RESULTS There was no pathogen detected at 2 to 5 days after operation.There were 1,3 and 4 strains detected at 6,7 and 8 days after operation,respectively.Among the patients detected with pathogen,there were 5 males and 3 females.And there was 1 case of 18 to 30 years old,2 cases of 31 to 40 years old,3 cases of 41 to 50 years old,and 2 cases of 51 to 60 years old.CONCLUSIONS The appropriate time of replacing urine-collecting bags of allogenic kidney transplantation recipient is the fifth day after operation.There is no correlation between the results of urine culture and age or sex.

Objective We aimed to evaluatd the effect of oral nursing with oral washing on patients with peroral endotracheal intubation and discuss the appropriate oral nursing method for patients with patients with peroral endotracheal intubation. Methods We chose 150 patients with indwelling peroral endotracheal intubation after neurosurgery and divided them into the control group (73 cases) and the test group (77 cases). The test group received oral nursing with oral washing while the control group with routine oral nursing method. We compared the incidence of halitosis, the moist degree of oral cavity and the amount of the tooth fungus spot between the two groups. Results The incidence of halitosis and the amount of the tooth fungus spot in the test group were lower than those of the control group; The moist degree of oral cavity in the test group was higher than that of the control group, P<0.01. Conclusions Oral washing could effectively control halitosis, keep oral cavity moist and prevent the formation of tooth fungus spot.

Objective To investigate the function of Bcl-2 and Bax in the pathogenesis,development and regression of human hemangiomas.Methods We examined the expression of Bcl-2 and Bax in proliferating versus involuting human hemangioma tissues and normal skin tissues using immunohistochemical technique.Results The expression of Bcl-2 in proliferating hemangiomas was significantly higher than that in involuting hemangiomas and normal skin tissues(P＜0.01).No significant difference was found between the expression of Bcl-2 in involuting hemangiomas and that in normal skin tissues(P＞0.05).The expression of Bax in involuting hemangiomas was significantly higher than that in proliferating hemangiomas and normal skin tissues(P＜0.01);the expression of Bax in proliferating hemangiomas was significantly higher than that in normal skin tissues(P＜0.05).Conclusion Bcl-2 and Bax participate in the development and involution of hemangioma,Bcl-2 plays a role in accelerating the proliferation of hemangioma by inhibiting the apoptosis of endothelial cells,and Bax promotes the switching from proliferation to involution in hemangiomas through inducing the apoptosis of endothelial cells.

Objective To establish the animal model of chronic thromboembolic pulmonary hypertension(CTEPH) and to compare the accuracy of dual-energy CT (DECT) pulmonary angiography and histopathology for detecting CTEPH. Methods Eighteen canines were included in the study. All canines underwent paracentesis, embolization, CT scanning, pressure measurement and tranexamic acid feeding. The procedures were repeated every two weeks, until systolic/diastolic pressure in canines was≥30/15 mmHg or mean pulmonary artery pressure ≥ 20 mmHg.And then canines were sacrificed for histopathology examination. For CT pulmonary angiography (CTPA)in DE mode and DECT lung perfused blood volume (Lung PBV) images, the presence or absence of PE or perfusion defects were recorded on a per-canineand aper-lobe basis. With histopathological results as reference standard, the sensitivity, specificity of CTPA and lung PBV to detect PE were computed for two readers. The pairedχ2 test (McNemar test) was used to analyze the difference in diagnostic accuracy between CTPA and Lung PBV. Inter-reader agreement was also calculated with kappa test. Results CTEPH was demonstrated in 13 canines. On a per-canine basis, both readers found uneven and peripheral perfusion defects with DECT in 11 canines (84.6%, 11/13); while 5 canines (38.5%, 5/13) had cutoff or sudden stenosis of pulmonary arteries with CTPA;on a per-lobe basis,
both readers had sensitivities of 14.3%(5/35), 83.3%(30/36), specificities of 100.0%(30/30), 100.0%(29/29), accuracies of 53.8%(35/65), 90.8%(59/65)for CTPA and DECT, respectively. DECT had a higher sensitivity(χ2=-4.690,P<0.01)and accuracy(χ2=8.284,P<0.01) in detecting CTEPH. Excellent and moderate inter-reader agreements were observed with CTPA and DECT (Kappa=0.938, 0.572, both P<0.001). Conclusions It is feasible to make a CTEPH animal model with autologous thrombus. DECT shows a higher accuracy than CTPA to detect CTEPH in this canine model study.

ObjectiveTo evaluate the image quality of displaying the pulmonary artery and pulmonary emboli at different tube voltages and find the optimal tube voltage.MethodsSixty-six patients underwent contrast-enhanced dual energy CT pulmonary angiography (CTPA) from August 2007 to February 2010.Data obtained with 80 kVp,weighted average 120 kVp,and 140 kVp were divided into group Ⅰ,Ⅱ,and Ⅲ respectively.CT value of pulmonary artery ( grade 1—4),emboli,and muscles were measured.Corresponding signal to noise ratio (SNR) and contrast to noise ratio (CNR) were calculated.One-way ANOVA analysis and Friedman test were used to analyze statistical significance among these values.Image quality of CTPA from these three groups was assessed.The inter-reader agreement of image quality was performed by kappa test.ResultsCT value of branch 1 to 4 of ptlmonary artery was (446 ± 140) HU,(433±130) HU,(411 ±138) HU,and (392±127) HU in group Ⅰ,(303±91) HU,(290±85) HU,(276±86) HU,and (263 ±85) HU in group Ⅱ,and (244 ±70) HU,(230 ±63) HU,(216 ±72) HU,and (205 ±68) HU in group Ⅲ.There was significant difference for CT values (P ＜0.01) among three groups.CT value of pulmonary artery in 80 kVp images was higher than 140 kyp and 120 Kvp.On quantitative analysis of 37 patients,CNR value of pulmonary clots was 8.3 ± 3.3,8.0 ± 2.9,and 5.6 ± 2.2 in group Ⅰ,Ⅱ,and ⅢⅢ,respectively.CNR values of pulmonary clots in 80 kVp images and 120 kVp images were higher than that in 140 kVp (P ＜0.01 ).There was no statistical difference for image quality of CTPA among the three groups ( P ＞ 0.05 ).Agreement of image quality of CTPA derived from 80 kVp (kappa value =0.789,P ＜0.01 ) was superior to that of 120 kVp (kappa value =0.652,P ＜0.01 ) and 140 kVp ( kappa value = 0.509,P ＜ 0.01 ).Conclusions CT value of pulmonary artery in 80 kVp images was higher than that of weighted average 120 kVp and 140 kVp,and the image quality and CNR was comparable with that of weighted average 120 kVp images.This tube voltage ( 80 kVp) is optimal for CT pulmonary angiography in the evaluation of patients with suspected pulmonary embolism.

This research adopted silt as the sample,and the five highest hydrogen production performing strains contained in the sample were isolated. The strain whose hydrogen production was the highest was identified as Enterobacter cloacae by the analysis of 16S rDNA sequencing and comparison. It is showed by Plackett-Burman Experimental Design that only glucose,citric buffer and reducing agent had significant effects on hydrogen production by Enterobacter cloacae FML-C1. The path of steepest ascent was undertaken to approach the optimal response region of those three factors. Central Composite Design(CCD) and Response Surface Methodology(RSM) were employed to investigate the interaction of the variables and to ascertain the optimal values of the factors,which finally led to the maximum hydrogen production(VH2) . The theoretical optimal medium conditions were:glucose 21.5 g/L,citric buffer 13.6 mL/L,reducing agent10.0 mL/L. The five tentative tests matched this model well. The final VH2 was up to 2347.4 mL/L,which was 127.42% enhanced in comparison to the original. The result shows that PB experiment design and RSM analytical method work well in selecting factors which have significant influences on the hydrogen production and,moreover,achieve the ideal optimal result.

Objective To investigate the feasibility of the adaptive cardio sequence prospective ECG-gated dual-source CT coronary angiography (CTCA).Methods Thirty one patients underwent prospective ECG-gated dual-source CTCA. The patients were divided into two groups: group A, heart rate ≤ 75 times / minutes, 70% of R-R interval was chose; group B, heart rate> 75 times / minutes, 40% of R-R interval was chose. Two experienced radiologists assessed the image quality of 15 segments of coronary arteries in a double blinded fashion in a four score scale. Student t test was used to compare the image quality between two groups. CT dose index(CTDIvol) and effective dose(ED) were also calculated for both groups. Results 437 segments of coronary arteries in 31 patients were included this analysis, 408 segments (93.4%) had assessable image quality, while 29 segments (6.6%) had non assessable image quality. Of 226 segments in group A, 12 segments (5.3%) had non assessable image quality; however, 17 segments (8.1%) of 211 segments in group B had non assessable image quality. The average score of image quality was 3.57±0.64 in 31 patients. There was no statistical difference for mean image quality of group A (3.65±0.39) and group B (3.41±0.43)( t=1.62,P=0.12 ) . There was a statistical difference for mean image quality for segment 10 on a per segment basis ( t = 3.8 ,P＜0.05). CTDIvol and ED were (18.88±5.04) mGy and (4.31±1.05) mSv, respectively.Conclusion Adaptive cardio sequence prospective ECG-gated dual source CT can acquire assessable image quality of coronary artery with lower radiation dose to the patients, which has the potential to be a routine CTCA technique.

ObjectiveTo evaluate the feasibility of gadolinium-enhanced dual energy CT pulmonary angiography (CTPA) in detecting pulmonary embolism (PE).MethodsIn vitro dual energy CT of phantoms of gadolinium and iodinated contrast agents with different diluted ratio was performed,and CT values were measured at different tube voltages.Ten rabbits which were grouped into 3 ml/kg and 5 ml/kg groups underwent dual energy CT scan.CT values of pulmonary artery trunk and the first branch of pulmonary artery were measured.Sponge gelatin were injected into the femoral vein of 6 rabbits to make PE model next day,then lungs were re-imaged with dual energy CT 2 h after embolization.Creatinine was repeatedly measured before and one day after injection of gadolinium via ear marginal vein or femoral vein sampling.One-way ANOVA test and independent student t test were used to analyze the difference of pulmonary artery enhancement between different groups.Results ( 1 ) Compared with iodinated contrast agent,CT value of gadolinium-based contrast agent at 80 kV was higher than those at 140 kV and averageweighted 120 kV.(2) At 140,80,and average weighted 120 kV,CT values of pulmonary artery trunk [CT values were (463.1 ± 118.0),(664.2 ± 188.0),(522.9 ± 137.7) HU] and of the first branch of pulmonary artery [ CT values were (445.1 ± 82.3 ),(606.7 ± 207.2),(493.4 ± 117.3 ) HU ] were higher than those at 3 ml/kg [ CT value of pulmonary artery trunk was ( 258.1 ± 55.1 ),( 384.0 ± 92.3 ),(295.4 ± 73.6) HU,CT value of the first branch of pulmonary artery (245.0 ± 73.2 ),( 309.1 ± 94.2),(263.8 ±78.5) HU;all P ＜0.05].CT values of pulmonary artery trunk and the first branch of pulmonary artery at 80 kV were higher than those at 140 kV and average-weighted 120 kV ( pulmonary artery trunk:F =6.004,P =0.005 ; the first branch of pulmonary artery: F =4.374,P =0.018).In 6 rabbits,CTPA showed the enhancement cut-off of bilateral pulmonary arteries,gadolinium mapping showed decreased perfusion in the corresponding lung lobes,manifested as blue on color-coded map,while normal lung was color coded as red or yellow.Creatinine was higher by 6.7％ and 20.6％ for group 3 ml/kg and 5 ml/kg.ConclusionsWith similar X-ray attenuation characteristics as iodine,gadolinium-based contrast agent can be used to pulmonary contrast-enhanced dual energy CT imaging,simultaneously providing both CTPA and gadolinium maps to detect PE.

OBJECTIVETo investigate the expression of La protein in cervical cancer tissues and explore its role in the occurrence and progression of cervical cancer.

METHODSThe expression of La protein in cervical cancer and normal cervical tissues was detected by immunohistochemical staining. RNA interference technology was used to silence La protein expression in HeLa cells and the changes in cell proliferation, tumor sphere formation and cell cycles were investigated.

RESULTSThe expression of La protein was significantly higher in cervical cancer tissues than in normal cervical tissues (61% vs 9%, P<0.05). Silencing La protein expression in HeLa cells caused significantly reduced the cell proliferation and lowered the tumor sphere formation rate from the control level of (17.1=1.92)% to (6.3=0.45)% (P<0.05), resulting also in G0/G1 cell cycle arrest and reduced cyclin D1 protein expression.

CONCLUSIONThe RNA binding protein La can promote the development of cervical cancer and may play a critical role in the carcinogenesis and progression of cervical cancer.

Autoantigens ; metabolism ; Cell Cycle Checkpoints ; Cyclin D1 ; metabolism ; Female ; HeLa Cells ; Humans ; RNA Interference ; RNA-Binding Proteins ; metabolism ; Ribonucleoproteins ; metabolism ; Uterine Cervical Neoplasms ; metabolism ; pathology

Objective:To investigate the effects of resistance exercise on mitochondrial function, muscle attenuation and muscle fiber morphology in quadriceps femoris of aged rats.Methods:The 18-month-old male rats were randomly divided into five groups( n=8, each): control(not exercise), 0% weight-bearing, 30% weight-bearing, 50% weight-bearing, and 70% weight-bearing exercise.After maximum resistance running, intermittent race table resistance exercise with 0%, 30%, 50%, 70% maximum load were performed.The treadmill placement slope was 35°, the running speed was 15 m/min, and exercise was performed every other day.At the end of the 8 th week, the mitochondrial membrane potential of quadriceps femoris muscle was measured, cytosol contents of cytochrome C(Cyt c), apoptosis-inducing factor(AIF), and apoptotic protein(Smac/DIABLO)were measured, and the morphology and structure of muscle fibers were observed. Results:Compared with the control group, the mitochondrial ΔΨmt was increased in the 0%, 30%, 50% and 70% maximum load groups, with a significant difference in the increment in the 0%, 30% and 50% maximum load groups( t=7.412, 5.611, 6.213, all P<0.01).Compared with the 0% maximum load group, the percentage of cells with mitochondrial ΔΨmt was statistically significantly decreased in the 30% maximum load group(10.6%)( t=9.356, P<0.05), while the percentage of cells with mitochondrial ΔΨmt was statistically significantly increased in the 70% maximum load group(10.03%)( t=8.341, P<0.05).Compared with the control group, the contents of Cyt c, AIF and Smac/DIABLO in the cytoplasm of quadriceps femoris of aged rats with 8-week resistance exercise were decreased, among which the contents of Cyt c and Smac/DIABLO were statistically significantly decreased in the three groups of 0%, 30%, and 50% maximum load( t=8.324, 7.516, and 6.871, all P<0.05), as well as the decrement in AIF of the three groups of 0%, 30%, and 50% maximum load was statistically significant( t =9.434, 8.78, and 7.342, all P<0.05).Compared with the control group, the vacuolar area of muscle fibers was extremely significantly decreased in the 0%, 30%, and 50% maximum load groups( t =5.567, 6.784, and 7.432, P<0.01); the protein content in the quadriceps femoris muscle was very significantly increased in the 30%, 50%, and 70% maximum load groups( t =7.478, 6.765, and 4.564, all P <0.01).Compared with the 0% maximum load group, the protein content in the quadriceps femoris muscle was very significantly increased in the 30%, 50%, and 70% maximum load groups( t=9.236, 8.342, and 6.456, all P<0.01). Conclusions:Low and medium weight-bearing resistance exercise can improve the mitochondrial function of quadriceps femoris, reduce the femoral quadriceps mitochondria-released proapoptotic proteins Cyt c, AIF, and Smac/DIABLO, and reduce the incidence of quadriceps femoris apoptosis.Low and medium weight-bearing resistance exercise can increase the protein content of muscle fibers, reduce the vacuolar area of muscle fibers, maintain muscle mass, and delay the occurrence of sarcopenia.