Objective To explore the dynamic changes of blood brain barrier(BBB)permeability after experimental subarachnoid hemorrhage(SAH)in rats.Methods Eighty female SD rats were divided into normal saline control group(n=10)and SAH group(n=70).The SAH model was induced by injecting 300 ?l of autologous arterial blood into the subarachnoid space near the circle of Willis via a cannula in an artificial hole between the olfactory bulb and frontal lobe.BBB permeability in cerebral cortex of SAH and normal saline rats was assessed at 6,12,24,36,48,60,and 72 h after SAH establishment by fluorescence spectrophotometer and fluorescence microscopy for Evans Blue(EB)extravasation.The ultrastructural changes in BBB were observed with transmission electron microscope.Results Compared with the control group,the changes of Evans Blue content and extravasation in cerebral cortex of SAH group peaked at 36 h(P0.05).The severe ultrastructural abnormality was found at 36 h after SAH.Conclusion The changes of BBB permeability develop at the acute stage of SAH,resulting from multiple factors together.The BBB after SAH possesses a self-repairable property.

OBJECTIVE:To establish the quality standard of Yanyan pills.METHODS: The constituents such as Lysimachia christinae,Radix et Rhizoma Glycyrrhizae and Radix Astragali were identified qualitatively by TLC,and the content of caffeotannic acid in L.christinae was determined by HPLC.RESULTS: The TLC spots were distinctive and well-isolated.The linear range of caffeotannic acid was 0.036～0.18 ?g(r=0.999 9)with an average recovery of 100.8%(RSD=0.67%,n=6).CONCLUSION: The established standard is applicable for the quality control of Yanyan pills.

4-Hydroxycoumarins ; poisoning ; Acute Disease ; Adult ; Humans ; Male ; Poisoning ; diagnosis ; Prothrombin Time

Adult ; Electromyography ; Gasoline ; poisoning ; Humans ; Male ; Poisoning ; physiopathology ; psychology ; Young Adult

A sensitive and reliable liquid chromatography-electrospray ionisation-tandem mass spectrometry (LC-ESI-MS/MS) method was established to simultaneously quantitate four categories of compounds (isoflavonoids, flavonoids, alkaloids and saponins) in Gegen-Qinlian decoction (GQD). These compounds were separated by a Shiseido CAPCELL PAK C18 column with a linear gradient consisting of 0.1% (v/v) formic acid in water (A) and 0.1% (v/v) formic acid in acetonitrile (B), and delivered at a flow rate of 0.3 mL/min. All the analytes were determined by electrospray positive ionization tandem mass spectrometry in a multiple reaction monitoring (MRM) mode. Linearity, accuracy, precision, recovery and stability of the method were evaluated with the validation over the range of 4.0-538 5 ng/mL. The proposed method was applied to the analysis of a Chinese herbal preparation GQD successfully.

OBJECTIVE To analyze the flora distribution and drug resistance of pathogenic bacteria isolated from the clinical specimen in the hospital of gynecology and obstetrics,and provide the reference in rational administration for clinical infectious diseases. METHODS Flora cultivation and isolation was operated with the methods descripted by the National Clinical Laboratory Operational Regulations.Flora was identified with the VITEK-32 automatic identifier,and bacteriostatic test was operated with Kirby-Bauer method. RESULTS Totally 3 364 strains of pathogenic bacteria were detected,it comprised 2 551 strains of bacteria and 813 strains of fungi.In our study,18.7% of Escherichia coli and 16.9% of Klebsiella pneumoniae were detected to produce extended spectrum ? lactamases(ESBLs).The isolating rate of meticillin resistant Staphylococcus aureus(MRSA) and meticillin resistant S.epidermidis(MRSE) was 46.77% and 81.17%,respectively. CONCLUSIONS To grasp the characteristic of flora distribution and drug resistance of pathogenic bacteria could conduce to rational use the antibiotic drug.It is important to control the hospital infection.

Objective: To observe the effect of chronic psychological stress on change of function of learning and memory, and CD4, and CD8 in mice. Methods: 50 BALB/c mice were randomly divided into control group and immobilization stress group (n=25 in each group). The mice mode of stress was made by restraint for 6 hours per day. Suspend tail test was performed on change of behaviors in mice. RIA was employed to measure levels of neuropeptide Y in the brain. Results: Compared with the control group, the mean escape latency of the mice in the chronic restraint groups was longer than that of the control mice (P

OBJECTIVETo observe the effect of Yangxue Qingnao Granule (YQG) on the expression of CD11b in CA1 region of hippocampus of vascular dementia rats, and to explore its regulation on microglias.

METHODSTotally 144 SD rats were randomly divided into the sham-operation group, the vascular dementia model group (model), and the YQG treated group (treated). The vascular dementia rat model was prepared by modified Pulsinelli's four-vessel occlusion. Rats in the sham-operation group and the model group were administered with normal saline -(at the daily dose of 10 mL/kg) by gastrogavage, while those in the treated group were administered with YQG (0.32 g/mL, at the daily dose of 10 mL/kg) by gastrogavage. All administration was performed once per day for 8 successive weeks. The expression of CD11b in CA1 region of hippocampus of vascular dementia rats was detected at week 1, 2, 4, and 8, respectively.

RESULTSCompared with the sham-operation group, the expression of CD11b in CA1 region of hippocampus of vascular dementia rats were significantly enhanced in the model group at each time point (P < 0.01). Compared with the model group, the expression of CD11b in CA1 region of hippocampus of vascular dementia rats significantly decreased in the treated group at each time point (P < 0.01), especially at week 2.

CONCLUSIONObvious activation and proliferation of microglias could be seen in CA1 region of hippocampus of vascular dementia rats, and YQG could inhibit activation and proliferation of microglias.

Animals ; CA1 Region, Hippocampal ; drug effects ; metabolism ; CD11b Antigen ; metabolism ; Dementia, Vascular ; drug therapy ; Disease Models, Animal ; Drugs, Chinese Herbal ; pharmacology ; Microglia ; drug effects ; Random Allocation ; Rats ; Rats, Sprague-Dawley

Developmental changes in children can affect drug disposition and clinical effects. A physiologically-based pharmacokinetic (PBPK) model is a mathematical model that can be used to predict blood drug concentrations in children and gain insight into age-dependent physiological differences in drug disposition impact. Pediatric PBPK (P-PBPK) models have attracted attention over the past decade. With the concerted efforts of academia, pharmaceutical companies, and regulatory agencies, there are more and more examples of pediatric clinical studies using PBPK models. Nevertheless, the number of P-PBPK models and their predictive performance still lag behind adult models. By referring to the literature, we study the process of children adapting to adult absorption, distribution, metabolism, and excretion (ADME) parameters and analyze the general principles of P-PBPK model establishment. In addition, we summarize the functions and application examples of commonly used P-PBPK modeling software to provide a basis for the rational application of modeling software.

Abstract: Objective To establish the duplex TaqMan RT-PCR method for detection of Entamoeba histolytica and Giardia lamblia in fecal samples. Methods Primer pairs and probes for Entamoeba histolytica and Giardia lamblia were designed and duplex TaqMan RT-PCR amplification system was constructed. PCR products were inserted into the pUC57 plasmid, and the lower limit of detection of the method was determined. Clinical stool samples were tested in order to evaluated the efficacy of the method. Results The detection limits of duplex TaqMan RT-PCR were 31.6 copies/μL for Entamoeba histolytica and 32 copies/μL for Giardia lamblia, respectively. Of the total of 212 clinical stool samples tested, all 3 samples with E. histolytica-positive patients by microscopy were positive by PCR, while 1 from 209 samples with E. histolytica-negative patients by microscopy were positive by PCR, and the remaining samples were negative. For Giardia lamblia, all 8 samples positive by microscopy were positive by PCR, and 1 from 204 sample with a microscopy-negative patient was positive by PCR, and the remaining samples were negative. The amplification product sequencing and blast analysis were used to confirm that the amplified sequence in the specimen of a patient with negative microscopy but positive PCR belongs to the targeted pathogen, supported by clinical symptoms and laboratory test results. PCR results for other diarrhea-causing pathogens were negative, indicating no cross-reactivity. Conclusions The dual TaqMan RT-PCR method developed in this study can not only detect microscopy-positive samples of Entamoeba histolytica and Giardia lamblia but also can detect samples that were missed by microscopy, with higher sensitivity than the microscopy method. Further, this detection method does not cross-react with other diarrhea-causing pathogens, including cross-react with other diarrhea-causing pathogens including Iodamoeba butschlii, Blastocystis hominis, Plesiomonas, Aeromonas, Salmonella, Shigella, Sphaerozoum fuscum, and Entamoeba hartmani, thus has a good specificity.