OBJECTIVE To evaluate the sterilization steps and effects of low temperature plasma on heat-resistant items. METHODS Low temperature plasma sterilization was adopted to operate according to standard procedures including pre-sterilizaing, packaging, sterilization, unloading and storageing. RESULTS Low temperature plasma had the features of reliable sterilization effect, easy to monitor, short time needed, and high utilization rate which could greatly increase the number of surgery and have a long term storage. CONCLUSIONS Low temperature plasma sterilization is a kind of fast, safe and effective way of sterilization by which the sterilization quality is guaranteed and the hospital infection rate is reduced greatly to meet the clinical demands to sterile items.

Objective To explore the possible mechanism by which protein kinase C (PKC) involves in the neuronal apoptosis induced by cerebral ischemia/reperfusion Methods After the model of ischemia/reperfusion was established in male Wistar rats, PKC activity, FOS protein expression and neuronal apoptosis in their brains were observed The effect of PKC inhibitor, Dengzhanghua, on above indexes were studied at the same time Results Cerebral ischemia/reperfusion resulted in transloactional activation of PKC, accompanied with the increase of FOS expression and neuronal apoptosis Dengzhanghua prevented against the above changes Conclusion Activated PKC is involved in ischemia/reperfusion induced neuronal apoptosis by regulating FOS expression

Objective To study the transformation mechanism of triterpenes in processing of Alisma orientalis. Methods The triterpene transformations of A. orientalis pre and post-processing were comparatively analyzed by techniques of HPLC and Packed Column Supercritical Fluid Chromatography (SFC). Results In baked processing (70 ℃) of A. orientalis, little alisol B 23-acetate was transformed into alisol A 24-acetate and alisol B.However, more alisol B 23-acetate was transformed into alisol A 24-acetate and alisol B, then both of them were further transformed into alisol A in processing under high temperature (160-200 ℃). Conclusion Transformation of alisol B 23-acetate has two routes when A. orientalis is processed under high temperature: For one, alisol B 23-acetate is rearranged into alisol A 24-acetate which could be deacetylated into alisol A; for the other; it is deacetylated into alisol B first, then transformed into alisol A.

Objective To study the pharmacokinetics of Danshensu (tanshinol) in Danqi Injection(DQI) in dogs. Methods HPLC-UV detection was used to determine the Danshensu level in biological samples. The Lichrospher C18 column(4.6?250 mm,5?m) was used as an analytical column with a mobile phase consisted of acetonitrile-1 %acetic acid (8∶92),the flow rate being 1.0mL?min-1 and the wave-length being 280 nm. Results After intravenous injection of DQI in dogs,the plasma concentration-time curve of DQI in dogs fitted well to a two-compartment model,with the characteristics of fast absorption and slow elimination.Its pharmacokinetics parameters are as follows:?=1.533 h-1,?=0.5111 h-1,T(peak)=0.25 h,T1/2?=0.573 h. Conclusion The pharmacokinetics of DQI in dogs fits the two-compartment model.In the pharmacokinetics of Danshensu,elimination course is the main course with the slow and lasting characteristics.

Objective To study the applicability of ultrafiltration of tween-80 and it solubilizing schizonepeta volatile oil and paeonol of ultrafiltration. Method Taking components content as index, temperature, pressure, concentration and membrane pore size were selected as factors for orthogonal design method. The concentration was determinated in medical solution before and after ultrafiltration, and the transmittance rate (TS) was calculated to observe the content variation of tween-80 and it solubilizing solution. Results The four factors had markedly effect on TS of tween-80, concentration was statistically significant (P

AIM This study was designed to investigate the effect of aminoguanidine, an inhibitor of the glycosylated proteins formation, on the impairment of endothelium dependent relaxation induced by advanced glycation end products (AGE) in isolated rat thoracic aorta and its possible mechanisms. METHODS Exogenous glycosylated bovine serum albumin (AGE BSA) was prepared. Aortic rings were exposed to AGE BSA for 60 min to induce the impairment of endothelium dependent vasodilatation. In the drug treated groups, aortic rings were incubated with drug for 15 min and then exposed to AGE BSA for another 60 min in the presence of the drug. Vasodilator responses to acetylcholine (ACh) or sodium nitroprusside (SNP) of aortic rings were measured by isometric tension recording after drug treatment. RESULTS AGE BSA significantly inhibited the endothelium dependent relaxation in response to ACh, but did not affect endothelium independent relaxation in response to SNP. Pre incubation of aortic rings with aminoguanidine(50～500 ?mol?L -1 ) for 15 min and co incubation of aortic rings with AGE BSA for another 60 min markedly attenuated the inhibition of endothelium dependenet relaxation induced by AGE BSA in a dose dependent manner. Superoxide diamutase (SOD, 2?10 5 U?L -1 ), a scavenger of superoxide anions, also prevented the inhibition of endothelium dependent relaxation, which is similar to the effect of 500 ?mol?L -1 aminoguanidine. Furthermore, aminoguanidine (500 ?mol?L -1 ) also reversed impairment of endothelium dependent relaxation of rat aortic ring induced by endogenous oxygen free radicals generated by diethyldithiocarbamate (DETC, 10 ?mol?L -1 ) via inhibiting intracellular SOD. CONCLUSION Aminoguanidine can protect rat aortic endothelium against damage due to AGE BSA, and the beneficial effect of aminoguanidine may relate to its antioxidant properties.

Background and purpose:The clinical relevance of HBV infection with respect to diffuse large B cell lymphoma(DLBCL) patients and immune patterns of T lymphocyte subsets during chemotherapy remains unclear. This study aimed to identify the characteristics of T-cell mediated immunity in DLBCL patients with HBV infection, thereafter, to explore the possible cell-mediated immune mechanisms of HBsAg positive HBV infection on the survival of DLBCL. Methods:A total of 294 newly diagnosed DLBCL patients were enrolled in this cohort study. Four-color flow cytometric method was used to enumerate the absolute number of CD3+, CD4+, CD8+T lymphocytes and the CD4+/CD8+ratio in peripheral blood samples, at the onset of disease, 2-4, 4-6 and 6-12 months after the initiation of chemotherapy, individually. Results:The absolute number of CD3+, CD4+, CD8+T lymphocytes in both groups were similar at the onset of disease;the count of CD4+lymphocytes was lower in HBsAg positive group during 2 to 4 months after the initiation of chemotherapy, compared with that in the HBsAg negative group. During 4 to 12 months after chemotherapy, the CD4+/CD8+ratio in peripheral blood samples was significantly lower in HBsAg positive group. Conclusion:For newly diagnosed DLBCL patients who received chemotherapy, the dynamic nature of cell mediated immune response was characterized as a low counts of CD4+T lymphocyte during the ifrst several cycles of chemother-apy followed by a decreased circulating CD4+/CD8+ratio. Depressions of cell immunity after chemotherapy in HBsAg positive DLBCL patients were greater and prolonged.

The genetically modified mice , as a helpful model , have been widely used in life scientific research . However, several new issues appeared subsequently with the wide application of the genetically modified mice .Here, we mainly discussed and analyzed the problems in the management and usage of genetically modified mice , which underlies the foundation for establishing management practice of the genetically modified mice .

Using a UPLC-MS/MS (MRM) and cocktail probe substrates method, the metabolic fingerprint of the compatibility of Radix Aconite (RA) and Radix Paeoniae Alba (RPA) and its effect on CYP450 enzymes were investigated. These main CYP isoforms include CYP 1A2, CYP 2C, CYP 2E1, CYP 2D and CYP 3A. Compared with the inhibition effect of RA decoctions on CYP450 isoforms, their co-decoctions of RA and RPA with different proportions can decrease RA' inhibition on CYP3A, CYP2D, CYP2C and CYP1A2, but can not reduce RA' effect on CYP2E1. The metabolic fingerprints of RA decoction and co-decoctions with different proportions of RPA in CYP450 of rat liver were analyzed by UPLC-MS. Compared with the metabolic fingerprints of RA decoction, the intensity of diester-diterpenoid aconitum alkaloids decreased significantly, while the intensity of monoester-diterpenoid alkaloids significantly increased in the metabolic fingerprints of co-decoctions of RA and RPA. The results suggest that RA coadministration with RPA increased the degradation of toxic alkaloid and show the effect of toxicity reducing and efficacy enhancing.