Objective:To prepare a novel slow-releasing ketoconazole spraying membrane and to observe its effect on eczema and tinea corporis in guinea pigs.Methods: A novel ketoconazole spraying membrane was prepared with chitosan chlorhydrate as the membrane material.The contents of ketoconazole and desamethasone in the spraying membrane were assayed by HPLC.The separation was performed on Waters Symttry C_(18) column(250 mm?4.6 mm,5 ?m),with the mobile phase consisting methanol-potassium dihydrogen phosphate buffer(4∶1),at a flow rate of 0.6 ml/min.The dectection was carried out with a UV detector at 239 nm,at(22?2)℃.The quality criteria for the novel ketoconazole spraying membrane was established.The curative effect of the ketoconazole spraying membrane on eczema and tinea corporis was observed in guinea pigs and was compared with those of spraying membrane matrix,desamethasone antipruritics cream and compound ketoconazole cream.Results: The calibration curves of ketoconazole and desamethasone were linear between 0.2-2.0 mg?ml~(-1)and 0.02-0.20 mg?ml~(-1),respectively;the recoveries for ketoconazole and desamethasone were 98.41% and 97.84%,respectively.The intra-day and extra-day RSDs for ketoconazole were(1.17%) and 1.26%,respectively,and for desamethasone were 1.57% and 1.40%,respectively.Stimulation test showed that the spraying membrane had no irritative effect on the skin of guinea pig.The novel ketoconazole spraying membrane had similar effect on eczema and tinea corporis as those of desamethasone antipruritics cream and compound ketoconazole cream.Conclusion: This novel ketoconazole spraying membrane is easy to prepare and has obvious therapeutic effects on eczema and tinea corporis in guinea pigs,making it favourable for containing combined agents.

Objective To study the value of color Doppler ultrasound in diagnosis of deep vein thrombosis (DVT) of lower extremity and pulmonary embolism (PE) in spinal cord injury (SCI). Methods 60 PE patients (PE group) and 35 SCI patients without PE (control group) received color Doppler ultrasound examination for DVT of lower extremity. Results PE group included 36 SCI patients (PE-SCI group) and 24 no-SCI patients (PE-no-SCI group). There were 15 cases with lower extremity thrombosis in PE-SCI group, and 9 cases in PE-no-SCI group (P>0.05), while there were 5 cases in the control group. There was significantly different in lower extremity thrombosis between PE group and the control group (P<0.01). In PE group, the detection rate was not significantly different between acute PE (detected 11 cases out of 37 cases) and chronic PE (detected 10 cases out of 23 cases) (P>0.05). 31 cases were rechecked as lower extremity venous valve regurgitation and calf muscle vein dilation (51.7%) in PE group while 8 cases in the control group (22.9%) (P<0.01). Conclusion There is not significantly different in the detection rate of DVT of lower extremity in PE patients with and without spinal cord injury, which are higher than in the patients without PE. Color Doppler ultrasound is necessary to check DVT in acute and chronic PE patients.

OBJECTIVE: To prepare double-layer sustained release ornidazole films and investigate its release rate in vitro.METHODS: The double-layer sustained release ornidazole films film were prepared by the method of homogenate.The formula of the films were optimized by orthogonal experiment with the mass ratio of polyviol to CMC-Na(factor A),the total amount of polyviol and CMC-Na(B) and the amount of glycerol(C) as factors.The concentration of ornidazole was determined by ultraviolet spectrophotometry and its release rate was also computed.RESULTS: The double-layer sustained release film was well-shaped.The optimized formula of the film was as follows: factor A=1∶1,B=4.5 g,C=4.0 g.The standard curve of ornidazole was linear within a range of 1～20 ?g?mL-1(r=0.999 5,n=6),with an average recovery of 100.3%(RSD=1.3%,n=5).A continuous releasing of 11.0 hours was achieved for the prepared films and its cumulative release amount in vitro within 8 hours reached 81.50%.CONCLUSIONS: The preparative method of the films was simple,and the film had a slow-release property.

Objective To evaluate the value of color Doppler ultrasonography for diagnosis of superior mesenteric artery diseases. Methods78 patients with abdominal pain suspected to be superior mesenteric artery diseases underwent color Doppler ultrasonography. The results were compared with other imaging methods or findings in operation. Results4 patients with superior mesenteric artery embolization coincided with the founding in operation. 18 of the 22 patients suggested with superior mesenteric artery stenoses were confirmed by CTA or DSA. ConclusionColor Doppler ultrasonography can be used in diagnosis of superior mesenteric artery diseases.

ObjectiveTo study the value of quantitive scoring methodby ultrasound in differential diagnosis of thyroid nodule.MethodsTotally 1 360 patients with thyroid carcinoma or nodular goiter were given preoperative ultrasound examination of thyroid. The features of thyroid nodule and their signiifcances in diagnosing thyroid carcinoma were evaluated by logistic regression analysis. Surgical pathology was taken as golden standard. Signiifcant feature was scored as 1 point, and insigniifcant feature was scored as 0 point. In two groups, the data were analyzed statistically.ResultsLow echo, obscure boundary, incomplete or no capsule, incomplete or no halo, aspect ratio≥1, internal lfow, posterior acoustic attenuation, no cystic echo, microcalciifcation and background Hashimoto′s thyroiditis showed correlation with malignancy. There were statistically significant difference between thyroid cancer and nodular goiter in thyroid nodules scores (χ2=802.08,P<0.05). Of 768 thyroid nodules with<6 points, 742 were benign and 24 were malignant. Of 60 thyroid nodules≥10 points, 2 were benign and 58 were malignant. Of 314 thyroid nodules with 8-9 points, 60 were benign and 254 were malignant. Of 368 thyroid nodules with 6-7 points, 155 benign and 213 were malignant.ConclusionsQuantitive scoring of thyroid nodule had clinic signiifcance in differential diagnosis. Thyroid nodule with>8 points accounted for the majority of malignancy and should be considered for surgery.

The changes of expression and function of MDM2 and P53 by MDM2 specific antisense oligonucleotides were investigated in HL60 cells. Cells were divided into control group, AS group (MDM2 specific antisense oligonucleotides group), cisplatin group, and combined treatment group. FCM analysis and Western blot and RT-PCR were used to estimate apoptosis and the expression of MDM2 and P53. Our results showed that the transfection of MDM2 specific antisense oligonucleotides obviously inhibited MDM2 expression (P < 0.01) and increased the expression of P53 (P < 0.05). Apoptosis rate were reduced by MDM2 specific antisense oligonucletides and cisplatin (P < 0.01). It is concluded that MDM2 specific antisense oligonucletides can inhibit the expression of MDM2, induce the expression of P53 and increase the apoptosis of leukemia cells after chemotherapy.

BACKGROUND:Caveolin-1 is expressed in mammalian brain and involved in the normal development of the brain, which can affect the proliferation of neural stem cells in the brain. OBJECTIVE:To acquire neural stem cells from caveolin-1 knockout embryonic mice in vitro and study their biological characteristics. METHODS:The whole brain was separated from C57BL/6 mice and caveolin-1 knockout C57BL/6 mice respectively at encyesis 14-16 days. Single cellsuspension was obtained by enzyme digestion, and cultured in the conditioned medium of neural stem cells. Fol owing 7 days of primary culture, the cells were induced in Dulbecco’s modified Eagle’s medium/Ham’s nutrient mixture F-12 containing 10%fetal bovine serum for 7 days. RESULTS AND CONCLUSION:The major cells of the cellsuspensions from the fetal mouse brain were dead at 1 day after culture, and some single cells floated in the medium and their transmittance were better, and then they gradual y formed multicellular bal s after 3 days. A smal amount of cells were adhered at the bottom of culture plate after passage, and a great amount of cellbal s appeared after 7 days. The proliferation rate of neural stem cells from caveolin-1 knockout mice was higher than that from normal mice. The cellbal s were nestin-positive and their differentiated cells was positive for neurofilament 200, glial fibril ary acidic protein or O4, respectively. Al of the cells from normal mouse brain were positive for caveolin-1, but the cells from caveolin-1 knockout mice were negative for caveolin-1 by immunocytochemistry. Moreover, the speed of cellbal formation and the number of cellbal s in neural stem cells from caveolin-1 knockout mice were better than those from normal mice. Caveolin-1 negative neural stem cells were cultured successful y from caveolin-1 knockout mouse brain, and the results show that caveolin-1 can promote the proliferation of neural stem cells and inhibit their differentiation in vitro.

Objective To primarily investigate the clinical value of analgesia/nociception index (ANI) in evaluating the analgesic effect during lobectomy performed via video-assisted thoracoscope.Methods Forty ASA physical status Ⅰ or Ⅱ patients,aged 25-64 yr,weighing 45-80 kg,undergoing elective lobectomy performed via video-assisted thoracoscope,were enrolled in this study.After induction of anesthesia with propofol,sufentanil and cisatracurium,patients received double lumen endotracheal intubation.Anesthesia was maintained with targetcontrolled infusion of propofol,and iv infusion of remifentanil and cisatracurium.The concentration of propofol was adjusted to maintain the bispectral index (BIS) value in the range of 40-60.ANI,HR,systolic blood pressure (SBP),diastolic blood pressure (DBP) and BIS value were recorded within 5 min before and after the predefined time points including posture change between lateral and supine position,ventilatory pattern change between onelung and double-lung ventilation,skin incision and trocars insertion,lymph node dissection and pleural lavage.At skin incision and during trocars insertion,lymph node dissection and pleural lavage,the development of hemodynamic responses (increase in HR and SBP ＞ 20％ of baseline value) were recorded.Results The incidence of hemodynamic responses was 100％ at skin incision and trocars insertion,and 84 ％ during No.4,7,10 groups of lymph node dissection and after pleural lavage and difference was found in ANI during these stimuli.ANI was significantly decreased within 5 min after skin incision,trocars insertion,No.4,7,10 groups of lymph node dissection and pleural lavage than that before the procedures (P ＜ 0.05).The BIS value was maintained at 40-60,and no significant changes were found between before and after the procedures (P ＞ 0.05).No significant changes were found in ANI,HR,SBP,and DBP between before and after the changes of posture and respiratory pattern (P ＞ 0.05).Conclusion ANI can be used to evaluate the analgesic effect during lobectomy performed via video-assisted thoracoscope in patients and is unaffected by the changes of posture and ventilatory pattern.

Objective To explore effect of Simotang on gastrointestinal motility and expression of vasoactive intestinal peptide(VIP) in the hypothalamus, spinal cord and duodenum of chronical stressed mice. Methods Mice were randomly divided into normal, stress and Simotang group( n= 10 in each group), and given a variety of unpredictable chronic mild stress. After 21 days gastric emptying and intestinal propulsion function were measured,the expression of VIP was detected by immunohistochemistry and RT-PCR. Results Compared with mice in normal group( (49.81 ± 8.56)%; (51.02 ± 5.11 )% ), chronic stress increased gastric residual rate( (61.53 ±8.71 ) %; P ＜ 0.05 ) and reduced small intestine propulsion rate ( ( 31.79 ± 2.38 ) %; P ＜ 0. 05 ). There were differences in expressions of VIP positive cells and mRNA in duodenum( (8.8 ± 1.1 )/mm2 and(0. 58 ±0.03) ),hypothalamus ( ( 12.9 ± 1.5 )/mm2 and (0.81 ± 0. 07 ) ) and spinal cord ( ( 12.1 ± 1. 2)/mm2 and (0.76 ± 0.02) )in chronic stress group compared with normal group( (6.5 ± 0. 9)/mm2 and (0.43 ± 0. 04);( 10.8 ± 1.3 )/mm2and (0.57 ± 0.03 ); (9.3 ± 1.5 )/mm2 and (0.53 ± 0. 02 ) respectively). There was not difference in gastric residual rate (52.93 ± 9.15 )%, small intestine rate(48.98 ± 4.38 )% and expressions of VIP positive cells and mRNA in duodenum ( (6.7 ± 0.9)/mm2 and (0.48 ± 0. 05 ) ), hypothalamus ( ( 10. 6 ± 1.4 )/mm2 and ( 0. 61 ± 0. 05 ) )and spinal cord ( (9. 1 ± 1.3)/mm2 and(0.55 ± 0.05 ) ) in Simotang group compared with those in normal group (P ＞ 0.05 ), but there were decreased compared with those in chronic stress group (P ＜ 0.05 ). Conclusion Simotang can regulate expressions of VIP in duodenum, hypothalamusand spinal cord in chronically stressed mice.