Atherosclerotic model of rabbit was established by feeding heavy dosage ofcholesterol for 60 days and then withdrew it for 30 days. The relation between cholesterolcontent, lipld peroxide (LPO), activity of antioxidative enzyme and the evolution of ath-erosclerotic lesions was observed. It was found that the serum cholesterol level increasedwith the increased duration of cholesterol feeding and reached a peak at the 60th day,then decreased rapidly after feeding was stopped. However the LPO level didn't fall, in-stead it was increased continuously to a much higher level than that of the control. Theanti-oxidative enzymes SOD and GSH-Px showed compensatory increase at the early stageof high LPO level. There after, it was decreased and was kept in lower level than thatof the control. There were developed atherosclerotic lesions of various degree in aorta,pulmonary and coronary arteries. Even one month after the stop of cholesterol feeding,progressive changes, such as large amount of smooth muscle cell proliferation and inflam-matory cell infiltration were observed, and the lesions became much more severe thanbefore. These results suggested that the exess of LPO in the serum resulted in inhibitionof anti-oxidative enzyine activity Which might play an important role in the initiatingand developing of atherosclerosis.

Objective To establish a loop-mediated isothermal amplification (LAMP) assay for rapid detection of the West Nile virus (WNV).Methods WNV genome (position nt 1 021 to nt 1 240) was synthesized by a PCR-based gene synthesis method.The synthetic fragments included 6 pairs of LAMP primer recognizing 8 primer sites of WNV genome.The LAMP gene amplification was carried out using a real-time PCR system at 63℃ for 60 min,then the amplification was terminated at 80℃ after 2 min.The amplification products were observed by agarose gel electrophoresis.The sensitivity and specificity of LAMP assay were compared with those of conventional PCR.Results The LAMP assay took less than 20 min,and the amplification product took on a ladder-like electrophoresis pattern.The sensitivity of LAMP assay was 10-fold higher than that of conventional PCR,and the detection limit of LAMP was 9.23 copies/?l.The specificity of WNV-specific LAMP assay was demonstrated by the negative amplification results from dengue virus and Japanese encephalitis virus,both were closely related members of the Flavivirus family.Conclusion LAMP assay is rapid,cost-effective,highly sensitive and specific in detecting genes of interest,and is of great significance for WNV surveillance,especially for grass root units and on-sport surveillance.

OBJECTIVE:To observe the clinical efficacy of Xinhuang tablets combined with Azithromycin granules and 0.1% Adapalene gel in the treatment of acne vulgaris.METHODS:216 patients with acne vulgaris were randomly divided into experimental group and control group according to visiting order (n=108).Experimental group were treated with oral administration of Xinhuang tablets and Azithromycin granules and 0.1% Adapalene gel for external use.Control group were treated with Erythromycin enteric-coated tablets and Compound sulfur lotion.Clinical efficacies of 2 groups were observed after 6 weeks.RESULTS:Total effective rate was 97.2% for experimental group and 41.6% for control group.There was significant difference between 2 groups (P

Objective To understand the correlation between insulin resistance(IR) and adrenal androgen excess in adolescents with polycystic ovary syndrome (PCOS). Methods According to BMI, 90 adolescents with PCOS were divided to groups of normal weight PCOS(NW-PCOS,33 cases,BMI<25.0 kg/m2) and obesity PCOS(OB-PCOS,57 cases, BMI≥ 25.0 kg/m2),and 15 normal weight healthy girls matched for age as controls.All patients had normal OGTT.Acute ACTH stimulating test was performed on patients, and cortisol (F), 17-hydroxyprogesterone(17-OHP), dehydroepiandrosterone(DHEA) during ACTH testing at 0 and 60 minute (steroid0 and steroid60) were determined. Results Compared with controls, NW-and OB-PCOS patients showed significantly greater levels of total testosterone (T), Luteotropic hormone(LH), FIns, 2 hIns, and HOMA-IR(P<0.01).The freqnencies of hirsuties and acne, and serum level of FIns, 2 hIns, and HOMA-IR were significantly higher and LH levels were much lower in the group of OB-PCOS than those in NW-PCOS(P<0.05 and P<0.01).ACTH stimulating test showed that PCOS patients had significantly higher levels of basal 17-OHP0, DHEA0, as well as 60-minute ACTH-stimulated levels (Steroid60) of 17-OHP60、DHEA60, and net increase of 17-OHP(Δ17-OHP)as compared with normal controls(P<0.05 and P<0.01).The 60-minute ACTH-stimulated levels of 17-OHP60, DHEA60,Δ17-OHP, and ΔDHEA were also higher in group of OB-PCOS than those in group of NW-PCOS(P<0.05 and P<0.01), and there were no obvious discrepancies in basal 17-OHP0, DHEA0 between OB-PCOS and NW-PCOS groups.Spearman correlation analysis showed that in group of OB-PCOS, HOMA-IR value was significantly associated with BMI, 17-OHP60, Δ17-OHP, DHEA60, ΔDHEA(P<0.05 and P<0.01); whereas in group of NW-PCOS, HOMA-IR was associated only with BMI(P<0.01). Conclusions The significantly higher basal and ACTH-stimulated levels of 17-OHP and DHEA indicates adrenal hyperresponsiveness in adolescents with PCOS.Adrenal androgen excess appears to be closely associated with insulin resistance in obese adolescents with PCOS

BACKGROUND:Calcium phosphate cement and recombinant human bone morphogenetic protein-2 both have bone osteoinductivity. Maybe both of them could promote repair of tendon-to-bone interface damage. OBJECTIVE:To evaluate the effect of calcium phosphate cement-II containing recombinant human bone morphogenetic protein-2 on tendon-to-bone interface healing after rotator cuff injury . METHODS: Twenty-seven adult healthy rabbits were enroled in the study. The tendon-to-bone interface of the bilateral shoulder joints was taken from three rabbits as normal group, and the bilateral shoulder joints of the other 24 rabbits were subjected to acute rupture of the rotator cuff and tendon-to-bone reconstructive surgery as experimental group (n=12) and control group (n=12). Rabbits in the experimental group were treated with calcium phosphate cement-II, while those in the control group treated with nothing. Specimens were colected at 2, 4, 8 postoperative weeks for biomechanical test. RESULTS AND CONCLUSION:The maximum tensile strength of the rotator cuff in the experimental group was higher than that in the control group (P < 0.001), but lower than that in the normal group (P < 0.001). At postoperative 8 weeks, the rigidity of rotator cuff of the experiment group was higher than the control group (P < 0.001) but lower than the normal group (P < 0.001). These findings indicate that calcium phosphate cement-II can improve the maximum tensile strength and rigidity of rabbit tendon-to-bone interface in the early postoperative period, enhance tendon-to-bone interface binding force, and promote tendon-to-bone interface healing.

Objective To investigate the expressions of serum cystatin C CysC),retinolbinding protein (RBP),serum and urinary β2-microglobulin (β2-MG) and their effects on predicting renal damage in primary hypertension in elderly patients.Methods A total of 149 patients were divided into 3 groups of hypertension grade 1 (n =50),hypertension grade 2 (n =50) and hypertension grade 3 group (n=49).92 healthy controls who took physical examination were selected as control group.The levels of serum CysC,RBP,serum and uric β2-MG,blood urea nitrogen,creatinine and other biochemical indexes were detected.The complications of hypertension were observed.The differences in renal function indexes between groups and their correlations were analyzed.Results There were 86 cases with hyperlipidemia (57.7％),71 cases with atherosclerosis (47.7％),59 cases with type 2 diabetes mellitus (39.6％),56 cases with coronary heart disease (37.6％),and 49 cases with cerebral vascular disease (32.9％) in 149 hypertensive patients.The levels of serum CysC,RBP,serum and uric β2-microglobulin were increased in hypertensive patients as compared with healthy controls (P＜0.05 or 0.01),and the extents of increments in the above indexes were positively correlated with blood pressure level [CysC:(1.2± 0.5) mg/L,(1.7±0.6) mg/L,(2.2±0.9) mg/L;RBP:(53.1±10.2) mg/L,(65.2±16.3)mg/L,(75.8±17.5) mg/L;serum β2-MG:(2.7±1.5) mg/L,(4.0±2.1) mg/L,(4.9±2.0) mg/L;uric β2-MG:(178.3±73.9) ng/L,(237.9±78.6) ng/L,(277.5±87.5) ng/L;respectively,P＜0.05or 0.01].Conclusions Elderly hypertensive patients are complicated with a variety of diseases.The levels of serum CysC,retinol-binding protein,serum and uric β2 microglobulin have significant diagnostic values on renal impairment caused by hypertension,and can be considered as sensitive factors for early renal impairment in essential hypertension.

0 05); The protein expression of erbB2 in carcinomas of palate and floor of mouth were obviously higher than the expression in lip cancer and gingival carcinoma( P 0 05).Conclusion The amplification and overexpression of c erbB2 and p53 play important roles in the formation and development of OSCC, the overexpression of c erbB2 protein has more important significance in tumorigenesis of carcinomas of palate and floor of mouth; Not only transcriptional regulation but also translational modulation exists on the expression of c erbB2 and p53. [

Objective:To explore the mechanism for immunomodulatory activity of Astragalus polysaccharide (APS) with peripheral blood mononuclear cells(PBMC)-derived plasmacytoid dendritic cells (pDCs) from healthy volunteers.Methods:Healthy volunteers-derived pDCs were sorted by flow cytometry,then incubated with APS (0m50,100,200 mg/L ).After 24 hours,the concentration of IFN-?,TNF-?,IL-6 was detected using ELISA.After 5 days,the cultured cells were collected and analyzed by flow cytometry,light microscope and electron microscope scanning.Results:APS-treated pDCs secreted higher level of IFN-?,TNF-?,IL-6.APS could promote differentiation of pDCs to dendritic cells (DCs) which displayed more matured morphology and immunophenotypes compared to the untreated-pDCs.Conclusion:APS could increase the immune function of pDCs,promote differentiation and maturation of pDCs.

Objective: To evaluate the diagnostic performance of conventional ultrasound, compression elastography (CE) and acoustic radiation force impulse imaging (ARFI) in diff erential diagnosis of benign and malignant breast tumors. Methods: A total of 98 patients with liver lesions were included in the study. The images of conventional ultrasound, CE and the values of virtual touch tissue quantiifcation (VTQ) of breast lesions were obtained. hTe diagnostic performance of conventional ultrasound, CE and ARFI were assessed by using pathology as the gold standard, and then evaluate the diagnosis effciency of these three approaches in differential diagnosing benign and malignant breast tumors. Results: The specificity, sensitivity and accuracy in the diagnosis of malignant breast tumors for conventional ultrasound were 80.0%, 81.1% and 81.7%, respectively, whereas for CE elastic score were 85.7%, 86.7% and 86.3%, respectively. With a cutoff value of 3.71 for the SR, the sensitivity, speciifcity, accuracy in diagnosis of malignant breast tumors were 97.1%, 83.3% and 88.4%, respectively. With a cutoff value of 3.78 m/s for VTQ, the sensitivity, speciifcity, accuracy in diagnosis of malignant breast tumors were 94.3%, 91.7% and 92.6%, respectively. The difference in diagnosis efficiency among ARFI, CE and conventional ultrasound in differential diagnosis of benign and malignant breast tumors was signiifcant (P<0.05). Conclusion: Conventional ultrasound, CE and ARFI are all useful for the differential diagnosis of benign and malignant breast tumors. But the diagnosis effciency of ARFI is superior to CE and conventional ultrasound. The three approaches can help each other in differential diagnosis of benign and malignant breast tumors.

AIM: To study the molecular mechanism in modulation of expression of insulin receptor substrate-1 and-2 (IRS-1,-2) by estrogen and high concentration of insulin. METHODS: The 5′-regulatory regions of IRS-1 and IRS-2 gene were cloned into the pGL3 plasmid with luciferase reporter, and the clones were transfected into HeLa cells. The cells were incubated with estradiol (1 nmol/L) and high concentration of insulin (100 nmol/L). The relatively transcriptional activity of the 5′-regulatory regions of IRS-1 and IRS-2 gene was detected. RESULTS: It was found that the relatively transcriptional activity of the 5′-modulatory regions of IRS-2 reduced markedly after cells were incubated with 100 nmol/L insulin (P