Objective To establish a high performance liquid chromatography method for simultaneous determination of 10 kinds of phthalates in cosmetics. Methods 10 kinds of phthalates were separated on a C18 column using methanol-water as mobile phase at a flow rate of 1.0 ml/min, 25℃ column temperature and 280 nm detection wave. Results The detection limit of 10 kinds of phthalates were 0.1-7 mg/L. The precision was less than 3.95% and recovery rates varied from 98.59% to 108.07%. Conclusion The experimental results show that the method is simple, precise and accurate and suitable to simultaneous determination of 10 kinds of phthalates in cosmetics.

Objective To develop a high performance liquid chromatography(HPLC)method for the determination of active components,sodium ascorbic phosphate,?-arbutin,hydroquinone,niacinamide,brillian-280 and phenol,in the whitening and Freckle-removing cosmetics.Methods Whitening and freckle-removing active components were separated on a C8 column(250 mm?4.6 mm,5 ?m)by using triethanolamine solution(11.15g triethanolamine dissolved in 1 L water,pH=7.7 adjusted with 1.75 ml H3PO4)+methanol=70+30 as the mobile phase at a flow rate of 1.2 ml/min,using diode array detector(DAD)with the detection wavelengh of 273 nm and the column temperature of 25℃.Results The coefficient of variation was less than 4.7% and the recovery rates were 87.3%-112.9%.Conclusion The method introduced in this paper is simple,rapid,accurate and is suitable for the analysis of various cosmetic samples.

Objective To observe the degradation pattern of tubulin in the cardiac muscle and lung tissue of rats after death.Methods 24 young male Sprague-Dawley rats were divided into 6 groups averagely.After being killed by bleeding,the rats were kept in an artificial climate incubator;the experimental temperature was kept at 20℃ and humidity at 50%.Proteins in cardiac muscle and lung tissue were extracted and tubulin was then examined by Western blot.Thereafter,the semi-quantitative analysis of the Western blot images was performed.Results Tubulin can be detected in the normal cardiac muscle and lung tissue of rats.After 1d postmortem,the tubulin content in these tissues began to decline,and it might still be detected at 7d postmortem,but the tubulin content in lung decreased faster than that in cardiac muscle.A linear relationship between tubulin content in cardiac muscle and lung of rats and the postmortem interval was determined.The linear regression equations and coefficients for integral optic density in relation to PMI were y=-1726.1x+14083 with correlative coefficient r=0.9684 for cardiac muscle and y=-1439.89x+12041 with correlative coefficient r=0.9808 for lung,respectively.Conclusion The level of tubulin in cardiac muscle and lung tissue of rats varied with PMI and the time dependent degradation of this protein was potentially useful for the PMI estimation.

Objective To observe the degradation of tubulin in liver,spleen and kidney of rats killed by bleeding and to explore its usefulness in estimation of postmortem interval(PMI).Methods 24 young male Sprague-Dawley rats were killed by bleeding and kept in an artificial climate incubator for 0,1,2,3,5 and 7d respectively,then the content of tubulin in spleen,liver,and kidney were examined by western-blot assay and the data of detection were analyzed statistically by using SPSS 11.5 software.Results Within a certain postmortem interval(PMI

Objective To explore an efficient treatment for bladder outlet obstruction caused by small benign prostatic hyperplasia(BPH). Methods From January 1996 to January 2005,69 patients with BPH were surgically treated.Of these patients,27 cases underwent open surgery,22 transurethral resection of prostate(TURP) and 20 TURP plus transurethral incision of bladder neck(TUIBN).There were no significant differences between the 3 groups in age,disease course,preoperative prostate weight and the excised prostate weight.The efficacy of open surgery,TRUP and TURP plus TUIBN were comparatively evaluated by international prostate symptom score(IPSS),peak urinary flow rate(Qmax),post void residual drine volume(PVR) and postoperative complications.Results After operation,the mean score of IPSS of patients which treated with open surgery decreased from(24.6+3.8) to(15.1?3.8),and the Qmax increased from(8.2?3.1)ml/s to(10.5?4.2)ml/s,and the PVR decreased from(96.0?36.0)ml to(54.0?27.0)ml.The IPSS of TURP group decreased from(22.3?5.6) to(11.7?2.7),and the Qmax increased from(8.5?3.6)ml/s to(11.4?4.2)ml/s,and the PVR decreased from(105.0?39.0)ml/s to(32.0?14.0)ml/s.The IPSS of the TURP plus TUIBN group decreased from(23.6?5.7) to(6.4?2.3),and the Qmax increased from(9.1?3.8)ml/s to(19.5?6.2) ml/s,and the PVR decreased from(98.0?37.0)ml to(8.0?5.0)ml.There were significant differences between the TURP plus TUIBN group and the other two groups in the IPSS,Qmax and PVR(P

Objective To investigate the relationships between the parameters of intravoxel incoherent motion (IVIM)DWI at 3.0 Tesla and T staging of moderately differentiated adenocarcinoma of rectum.Methods Clinical data and MRI findings including con-ventional imaging and IVIM-DWI were collected in a total of 37 patients with moderately differentiated adenocarcinoma of rectum proven by pathology.The patients were divided into two groups without (staging T1 and T2)or with myometrial invasion (T3 and T4).The D,D? ,f and ADC values of rectal cancer and normal rectal wall were measured and were compared between the lesion and normal rectal wall,between both groups and among different T stages.The relationships of the parameters of IVIM-DWI and ADC values with the T staging of moderately differentiated adenocarcinoma of rectum were analyzed.Results The D,D? ,f and ADC val-ues of rectal cancer were lower than those of normal rectal wall with statistical differences in D,f and ADC values (P <0.05).The differences in D and D? values among different T stages were statistically significant,and LSD Duncan test showed that the differ-ence in D? value between T1 and T4 (P =0.01 7)and between T3 and T4 (P =0.003)and in D value between T2 and T3 (P =0.005) were statistically significant.The D,f,D? and ADC values of noninvasion group and invasion one were (0.93±0.1 6)×10 -3 mm2/s versus (0.77±0.1 9)×10 -3 mm2/s,(27.1±2.94)% versus (24.6 ±4.13)%,(12.6±2.44)×10 -3 mm2/s versus (12.3±3.49)× 10 -3 mm2/s,and (0.95±0.09)×10 -3 mm2/s versus (0.87 ±0.12)×10 -3 mm2/s respectively,and the difference in D value was statistically significant (t=2.5 12,P =0.01 7).Conclusion The parameters of IVIM-DWI and the ADC values are different in rectal cancer and normal rectal wall,and the D value may help to identify the tumor invasion into the muscularis propria.

To study the effects of puerarin on the aromatase P450 (P450(arom)) mRNA expression and the effects of low-dose puerarin on transcription factors of the P450(arom) gene (P II) 5'-flanking region.

Objective To establish a drug-resistance cell line of human glioma with temozolomide ( TMZ) ,investigate its resistance mechanisms, and provide experimental evidence for optimal TMZ therapy. Methods A TMZ-resistant human glioma cell line,U251/TR,was established by stepwise exposure of human parental U251 cells to TMZ. Resistance index and cell viability were accessed by MTT assay. Western-Blot,RT-PCR,immunohistochemistry and immunofluorescence were used to detect MGMT expression for the analysis of resistance mechanism. Results A TMZ-resistant human glioma cell line,U251/TR,was developed after 8 months of stepwise induction with 0. 25-16. 00 μg·mL-1 TMZ. IC50 in U251/TR cells was approximately 7 times higher compared with that in U251 cells (P=0. 00 ). The MGMT expression was significantly increased in U251/TR cells compared with that in parental U251 cells (P=0. 00) . Conclusion A TMZ-resistant human glioma cell line,U251/TR,was established by stepwise exposure of human parental U251 cells to TMZ. The primary mechanism of TMZ resistance is associated with increased activity of MGMT.

A simple and reliable high performance liquid chromatography (HPLC) method has been developed for the simultaneous quantification of five major bioactive components in ‘Shu-Jin-Zhi-Tong' capsules (SJZTC), for the purposes of quality control of this commonly prescribed traditional Chinese medicine. Under the optimum conditions, excellent separation was achieved, and the assay was fully validated in terms of linearity, precision, repeatability, stability and accuracy. The validated method was applied successfully to the determination of the five compounds in SJZTC samples from different production batches. The HPLC method can be used as a valid analytical method to evaluate the intrinsic quality of SJZTC.

Objective To observe the effect of Huazhuo-Jiedu-Huoxue Tongluo recipe on local inflammation of cerebral ischemia reperfusion injury in mice. Method Fifty Kunming Mice were randomly divided into five groups: model group, high-dose group of TCM, low-dose group of TCM, nimodiping group and sham operation group. Each group had 10 mice. Mice models of the right middle cerebral artery CIRI in the first four groups were established through thread embolism method. Physiological saline was given to the mice in the model group and sham operation group. Nimodipine solution was given to the mice in the Nimodipine group. High and low dose of Huazhuo-Jiedu-Huoxue-Tongluo Chinese medicine decoction were given to the mice in the high dose of TCM group and low dose of TCM group respectively after the models were successfully established. To assess the expression level of IL-6 and TNF-α by radioimmunoassay after the treatment. Results Compared with model group [(219.29±39.28) pg/ml, (1.325 ± 0.236) ng/ml] , the level of IL-6 and TNF-α of high dose of TCM group[(120.69±49.23)pg/ml, (1.086±0.178)ng/ml], low dose of TCM group[(173.97±49.03)pg/ml, (0.937 ± 0.105)ng/ml]and nimodipine group[(170.88± 47.06)pg/ml, (1.092±0.184) ng/ml]decrease (P<0.05). There is no significant difference between the high dose of TCM group and the sham operation group (P>0.05). Conclusion Huazhuo-Jiedu-Huoxue-Tongluo recipe can restrain the expression of inflammatory cytokines and reduce the infiltrating of leukocytes in mice with cerebral ischemia reperfusion injury.