1.Preparation of Rifampicin Suppositories and Solubility Determination
Yan TIAN ; Ge TIAN ; Qian YANG ; Yadong CHU
China Pharmacy 1991;0(01):-
OBJECTIVE: To prepare rifampicin suppositories and to determine its dissolution in vitro. METHODS: Rifampicin suppositories were prepared with gelatin and glycerine as base material, the dissolution of rifampicin suppositories was determined by UV spectrophotometry and which were compared with rifampicin capsules sold in the market. RESULTS: The linear range of rifampicin was 10.0~60.0?g?mL-1(r=0.9 999), and the average recovery was 99.87%(RSD=0.42%, n=6). The dissolutions of rifampicin suppositories and rifampicin capsules in vitro at 45min were(89.9?0.97)% and(79.8?1.14)%, respectively. CONCLUSION: Rifampicin suppositories were simple in preparative method, well-formed, low in cost, and with high dissolution in vitro.
2.Genome Shuffling and Its Prospect for Strain Improvement in Ethanol Production from Lignocellulosic Hydrolysates
Zuo-Yang ZHANG ; Shen TIAN ; Fan-Yan MENG ; Fei YAN ; Feng-Tian LI ; Xiu-Shan YANG ;
Microbiology 1992;0(06):-
Commercial production of bioethanol from lignocellulosic hydrolysates requires efficient fermenting strains. The abilities of the strain to converting all types of sugars in the hydrolysate to ethanol in high yield and to effectively tolerating/metabolizing inhibitors are necessary. Genome shuffling is a novel method for breeding, and it has been applied in pharmaceutical and food industry. This review summarized the technique of genome shuffling including principle, process, applications and its prospect for strains improvement in ethanol production from lignocellulosic hydrolysates.
3.Roles of uPA and uPA-R in the course of repair after human embryo corneal alkali burn in vitro
Jun YAN ; Tian YANG ; Guoping LI ; Qiangguo GAO ; Jin YANG ;
Journal of Third Military Medical University 2003;0(15):-
Objective To explore the roles of urokinase type PA (uPA) and uPA receptor (uPA R) in the course of repair after human embryo corneal alkali burn in vitro . Methods After the alkali burn model in vitro was established successfully, some techniques such as the observation of cell culture and morphology, ICC and image analysis were used. Results No significant difference was found between the cells from corneal limbus and central cornea and almost all of them expressed AE1/AE3. The expressions of uPA and uPA R increased to the maximum at about 24 h after alkali burn. uPA expression distributed mainly in the cytoplasm but uPA R expression distributed mainly in the cell membrane. Conclusion The corneal epithelial cells of comparatively high purity can be acquired by tissue culture. There probably exists difference in development and vitality between embryo and adult cornea. There might be commonness of the roles of uPA and uPA R in epithelial tissue.
5.Determination of Warfarin in Human Plasma by HPLC
Xiaohui HUANG ; Ping YANG ; Yan LIU ; Huaiping TIAN ; Jian ZHANG
China Pharmacist 2014;(2):199-201
Objective:To establish a simple HPLC method for the determination of warfarin in human plasma and analyze the re-sults of 100 monitoring reports. Methods:Warfarin was extracted from the plasma samples by acetonitrile. The extract was separated on a ZORBAX Eclipse XDB-C8 column (150 mm × 4. 6 mm, 5 μm)with a mobile phase consisting of methanol and 0. 1% acetic acid (65∶35) at flow rate of 1. 0 ml·min-1 and detected by a diode array detector. The detection wavelength was at 308nm and the sample size was 20 μl. Results:The calibration curve was linear within the range of 0. 1-5. 12μg·ml-1 . The average recovery and RSD was ranged from 85. 0% to 102. 3% and 1. 2% to 3. 9%(n=6), respectively. Inter-and intra-day RSD were 1. 1%-1. 8% and 1. 6%-2. 9%, respectively. Conclusion:The proposed method is rapid, convenient and accurate in the detection of warfarinin concentration in plasma.
6.Interactions between the recombinant human CREG protein and cathepsins and M6P/IGFIIR
Mingyu SUN ; Chenghui YAN ; Xiaoxiang TIAN ; Yang LI ; Yaling HAN
Chinese Journal of Tissue Engineering Research 2015;(37):5961-5965
BACKGROUND:It has been found that cel ular repressor of E1A-stimulated genes (CREG) is a lysosomal protein binding directly to the mannose-6-phosphate (M6P)/insulin-like growth factor II receptor (IGFIIR) and depends on the interaction with M6P receptors for efficient delivery to lysosomes OBJECTIVE:To study the interactions between the exogenous CREG protein and cathepsins and M6P/IGFIIR and to confirm the effect of CREG protein on expression and distribution of M6P/IGFIIR. METHODS:Double-stained immunofluorescence and coimmunoprecipitation were applied to observe the interactions between the exogenous CREG protein and cathepsin B, cathepsin L and M6P/IGFIIR. Using gain-of-function and loss-of-function approaches, the effect of CREG on expression and distribution of M6P/IGFIIR were studied by western blot assay and immunofluorescence staining. RESULTS AND CONCLUSION:Double-stained immunofluorescence and coimmunoprecipitation analyses confirmed the direct interactions between the exogenous CREG protein and cathepsin B, cathepsin L and M6P/IGFIIR. It was verified that CREG plays a critical role not in the expression but in the distribution of M6P/IGFIIR using gain-of-function and loss-of-function approaches. These findings provide evidence that exogenous CREG protein is located in lysosomes and has interactions with cathepsins and M6P/IGFIIR, also CREG plays a critical role in the distribution of M6P/IGFIIR.
7.Effects of Radix Ginseng and Radix Notoginseng formula on secretion of vascular endothelial growth factor and expression of vascular endothelial growth factor receptor-2 in human umbilical vein endothelial cells.
Yan LEI ; Wei TIAN ; Linqun ZHU ; Jing YANG ; Keji CHEN
Journal of Integrative Medicine 2010;8(4):368-72
Objective: To investigate the effects of Radix Ginseng and Radix Notoginseng formula on secretion of vascular endothelial growth factor (VEGF) and expression of vascular endothelial growth factor receptor-2 (VEGFR-2) in human umbilical vein endothelial cells (HUVECs) in vitro. Methods: HUVECs were cultured in vitro. Bovine basic fibroblast growth factor (bFGF) at concentration of 320 U/mL and Radix Ginseng and Radix Notoginseng formula at concentrations of 0.1, 0.2 and 0.4 mg/mL were used to culture with HUVECs. And HUVECs in blank control group were cultured with culture solution only. After 24-hour culture, the content of VEGF in supernatant was detected by enzyme-linked immunosorbent assay and the expression of VEGFR-2 was detected by immunocytochemical staining and Western-blotting. Results: Radix Ginseng and Radix Notoginseng formula at 0.4 mg/mL, the same as bFGF, increased VEGF content in the HUVEC supernatant and the number of VEGFR-2-positive HUVECs. Expression of VEGFR-2 protein in high-dose Radix Ginseng and Radix Notoginseng formula group was up-regulated as compared with the blank control group. Conclusion: Radix Ginseng and Radix Notoginseng formula can promote HUVEC proliferation and secretion of VEGF, as well as the expression of VEGFR-2 protein, which may be one of the mechanisms of Radix Ginseng and Radix Notoginseng formula in promoting angiogenesis.
8.Metabolism of polyunsaturated fatty acid and its relationship with △6 desaturase activity in colorectal cancer
Kai YANG ; Wen TIAN ; Jin DONG ; Yan DONG ; Hong LI
Cancer Research and Clinic 2013;(5):293-295,299
Objective To study metabolism of polyunsantured fatty acid (PUFA) and to investigate the relationship between different PUFA compositions and △6 desaturase (D6D) activity in colorectal carcinoma (CRC).Methods Fresh frozen malignant CRC tissues were obtained from 61 patients and blood samples were detected in 38 patients.The PUFA composition in these samples was determined by gas-liquid chromatography on a capillary column.The fatty acid product-to-precursor ratios in blood and tissue as estimates of desaturase activity (D6D activity index),and its relationship with the ratios between different PUFA compositions were investigated.Results Metabolism of ω-6 PUFA dominated in PUFA metabolism path.The ratio of ω-6/ω-3 PUFA was 4.89 in blood samples and 10.15 in tissues.The ratio of LA/ALA was 101.92 in blood samples and 86.16 in tissues.The ratio of ω-6/ω-3 LC-PUFA was 2.86 in blood samples and 4.51 in tissues.The D6D activity index in ω-6 PUFA metabolic processes both in tissues (t =1 1.609,P =0.00) and blood samples (t =-9.151,P =0.00) were higher than that in ω-3 PUFA.Conclusion In colorectal carcinoma,the ω-6 PUFA metabolic not only plays an important role in the metabolism of PUFA,but also is more active than the ω-3 PUFA metabolic,and in some way links to the development of tumorigenesis in CRC.
9.Diagnosis and treatment of pancreatic cystic neoplasms
Jun WANG ; Xiaodong TIAN ; Hongqiao GAO ; Yan ZHUANG ; Yinmo YANG
Chinese Journal of General Surgery 2014;29(9):661-665
Objective To investigate the risks and benefits of different surgical treatments for cystic neoplasms of the pancreas (CNP).Methods The clinical data of 243 CNP patients were reviewed retrospectively.Different surgical treatments were adopted according to the site,size and invasiveness of the tumors.A long term follow-up was carried out for patients with small benign CNP,and a surgical excision is proposed if tumors progressed during the observation.Results 58 outpatients with no evidence of malignancy was followed up and had long-term survival,in which 4 patients received a surgical resection in case of tumor progression,and all of them were confirmed benign tumors.185 cases received surgical treatments,with a resection rate of 97.3% (180/185),including 127 non-invasive tumors,and 58 cases of invasive tumors.Perioperative mortality was 2/185,and morbidity rate was 41/185.Pancreatic fistula was the most frequent complication,which was significantly associated with tumor site and excision extension.All patients with non-invasive CNP acquired a long term survival after surgical treatments.The postoperative 1,3,5 year survival rates for patients with invasive lesions were 89.6%,52.1% and 29.2%,respectively.Conclusions Long term follow-up and observation is feasible for asymptomatic patients with benign CNP.A radical resection should be performed for malignancy,and a combined multi-organ resection may improve the prognosis for local advanced tumors.
10.The effects of repetitive transcranial magnetic stimulation on the cognitive ability in patients with mild cognitive impairment after ischemic stroke
Yamei LI ; Li XU ; Yan YANG ; Jinyan TIAN ; Qian YU
Chinese Journal of Physical Medicine and Rehabilitation 2015;37(10):739-742
Objective To explore the effects of repetitive transcranial magnetic stimulation (rTMS) on cognitive ability in patients suffering from mild cognitive impairment (MCI) after ischemic stroke.Methods Forty five ischemic stroke survivors with MCI but not meeting the criterion for diagnosis as dementia were recruited, and were randomly assigned into an rTMS group (32 patients) and a control group (30 patients) according to a random number table.Both groups received the routine drug therapy of medicine and cognitive function training, and the rTMS group was additionally given rTMS over the left dorsolateral prefrontal cortex at 5 Hz and 80% motor threshold.The treatments lasted for 4 weeks.The Montreal Cognitive Assessment (MoCA) and auditory event related potential (ERP) were tested for both group before and after the treatment.Results After the treatment, two groups showed significant improvements in the average score of MoCA compared to that before the treatment, and that of the rTMS group was significantly higher than that of the control group.For both groups, the P300 latency shortened and the amplitude increased after the treatment.Moreover, the latency and amplitude of the rTMS group increased to 355.67 ± 16.43 ms and 8.69 ± 1.65 μV, respectively, after the treatment, significantly shortened and lengthened than that of the control group [(372.76 ± 23.35 ms and 7.03 ± 3.04 μV), respectively].Conclusions rTMS can significantly improve the cognitive ability of ischemic stroke survivors in a relatively safe way.