Objective To study the effects of propofol exposure during pregnancy on space cognitive and exploration abilities and expression of phosphorylated tau protein ( P-tau) and beta-amyloid protein[ Aβ(1-42) ] in hippocampus of the offspring. Methods Sprague-Dawley female (n=24) and male rats (n=8) of three months old were mated at the same cage at the ratio of 3:1. Pregnant rats were randomly divided into early group (group E), medium group (group M), late group (group L) and control group ( group C) , with 6 rats in each group. Groups E, M and L received propofol 80 mg · kg-1 · d-1 for 7 consecutive days. Propofol was replaced with equal volume of physiological saline in group C. Learning and memory of the 30-day offspring rats were assessed by using Morris water maze test. Then offspring rats were sacrificed to determine the expression of P-tau and Aβ(1-42) in the hippocampus by ELISA and immunohistochemistry. Results The learning and memory abilities were declined significantly in group E (51. 20±8. 11) s, group M (36. 00±6. 44) s and group L (47. 20±12. 30) s, as compared with group C (65. 60± 7. 23) s (all P<0. 05). The result of immunohistochemistry and ELISA showed that expression of Aβ(1-42) and P-tau in hippocampus was significantly higher in group M than in groups E, L and C[(immunohistochemistry: Aβ(1-42), (27. 38±5. 90) vs. (12. 65± 2. 08), (13. 79±3. 37), and (65. 60±7. 23); P-tau, (26. 35±5. 83) vs. (13. 65±3. 46), (14. 56±3. 82), and (8. 49±1. 20);ELISA:Aβ(1-42) , (88. 6±7. 43) vs. (71. 60±6. 79), (13. 79±3. 37), and (65. 80±6. 28);P-tau, (230. 13±8. 22) vs. (210. 42± 2.20), (210.95±1. 75), and (200. 65±1. 57)] (all P<0.05). Conclusion Multiple propofol injections may impair rat offspring’ s space cognitive abilities and exploration abilities, and the impairment is especially obvious in second trimester of pregnancy, which may be associated with over-expression of P-tau and Aβ(1-42) .

This article analyzes the status quo of sales supervision on medical devices through some aspects, including the relevant regulation system, the standards of sales admittance, the supervision team and the approval of business license. According to the exiting problems, some improving countermeasures are proposed for reference.
Materials Management, Hospital ; organization & administration

This paper focuses on issues needed to be clear towards the product quality supervision of medical devices in use. The life circle of medical devices, the supervision regarding its boundary, target, emphasis, basis and standards have been analyzed in turn. A clear and creative idea is also provided for theoretical exploration of the supervision on medical devices in use.
Materials Management, Hospital ; Quality Assurance, Health Care

Objective To describe the pathogenic and serological test results of the plague in China from 2001 to 2009, and human and animal plague distribution. Methods Through access to information of the plague surveillance report in China from 2002 to 2010, national plague pathogenic and serological test results and the epidemic situation were analyzed from 2001 to 2009. Results From 2001 to 2009, 2966 strains of Yersinia pestis were isolated in the seven provinces which were Guizhou, Guangxi, Yunnan, Qinghai, Tibet, Gansu and Inner Mongolia. Of these, 1 138 000 animals were detected by bacteriological method, 1998 strains of Yersinia pestis were isolated;379 227 groups of intermediary animals were detected, 927 strains of Yersinia pestis were isolated;41 strains of Yersinia pestis were isolated from human body. Animal serums of 1 169 702 were detected by indirect hemagglutination assay(IHA), of these 3177 animal serums were positive, 168 human serums were positive;53 323 animal samples were detected by reverse indirect hemagglutination assay(RIHA), of these 500 were positive. There were outbreak or epidemic of plague in 9 types of plague foci, 2925 strains of Yersinia pestis were isolated. Two animals and 6 fleas were judged as new reservoir and new vector. There were 23 counties of 6 provinces were judged as plague new natural foci counties. Conclusions The plague epidemic in China is still serious between 2001 and 2009. There are nine types of foci in the active state.

Objectives To observe the changes of magnetic resonance imaging(MRI) during the course of treatment in hepatolen-ticular degeneration (HLD) and to evaluate its related factors.Methods Sixty - three patients with HLD received routine SE sequence MRI of brain and liver.Twenty - two patients with abnormal MRI in 42 patients and each of them had 2-4 times of serial MRI ex-aminations at interval of 1.0- 1.5 year.Results Ten patients had lesion in both brain and liver in 22 patients. Nine patients only in brain, 3 patients in liver.The major lesions disappear or decrease after rational treatments. There were only slight or no changes of MRI abnormalities in patients receiving treatments or age of patients was over 15 year old. Abnormal MRI findings shown again after stopped treatments over 2 months. In such cases, the clinical and MRI improvements were slow.The rate of clinical and MRI improvement in patients with adequate treatment were markedly higher than patients with inadequate treatment.Conclusions Liver and brain lesion will show in MRI disappear after adequate treatment;There are only slight or no change or showing again in MRI abnormalities in pa-tients with inadequate treatments compared with poor clinical improvement. MRI is beneficial to understanding therapeutic effect and prognosis of HLD.

Objective To develop a new type of electrochemical immunosensor for the detection of ochratoxin A (OTA ) . Methods Double layers of self‐assembly immunosensor for the detection of OTA were constructed based on the composite single‐walled carbon nanotubes(SWNTs)/chitosan(CS) membrane immobilized on glassy carbon electrode(GC) .Scanning electron mi‐croscopy(SEM) ,square wave voltammetry and cyclic voltammetry were used to analyze the characterization of the sensor ,then its specificity for detection was studied .Results SWNTs/CS composit membrane could increase the sensitivity of OTA detection sig‐nificantly ,and effectively distinguish the different types of mycotoxins .Conclusion The electrochemical immunosensor developed in the study is easy to operate and could detect OTA rapidly with good specificity and low detection limit .

The aimed of this study was to prepare stabilized thiomers to overcome the poor stability character of traditional thiomers. Poly(acrylic acid)-cysteine (PAA-Cys) was synthesized by conjugating cysteine with poly(acrylic acid) and poly(acrylic acid)-cysteine-6-mercaptonicotinic acid (PAA-Cys-6MNA, stabilized thiomers) was synthesized by grafting a protecting group 6-mercaptonicotinic acid (6MNA) with PAA-Cys. The free thiol of PAA-Cys was determined by Ellmann's reagent method and the ratio of 6MNA coupled was determined by glutathione reduction method. The study of permeation enhancement and stabilized function was conducted by using Franz diffusion cell method, with fluorescein isothiocyanate dextran (FD4) used as model drug. The influence of polymers on tight junctions of Caco-2 cell monolayer was detected with laser scanning confocal fluorescence microscope. The results indicated that both PAA-Cys and PAA-Cys-6MNA could promote the permeation of FD4 across excised rat intestine, and the permeation function of PAA-Cys-6MNA was not influence by the pH of the storage environment and the oxidation of air after the protecting group 6MNA was grafted. The distribution of tight junction protein of Caco-2 cell monolayer F-actin was influenced after incubation with PAA-Cys and PAA-Cys-6MNA. In conclusion, stabilized thiomers (PAA-Cys-6MNA) maintained the permeation function compared with the traditional thiomers (PAA-Cys) and its stability was improved. The mechanism of the permeation enhancement function of the polymers might be related to their influence on tight junction relating proteins of cells.
Acrylic Resins ; chemistry ; Actins ; metabolism ; Animals ; Caco-2 Cells ; Cysteine ; chemistry ; Dextrans ; Fluorescein-5-isothiocyanate ; analogs & derivatives ; Glutathione ; Humans ; Intestinal Absorption ; Intestinal Mucosa ; drug effects ; Nicotinic Acids ; chemistry ; Rats ; Sulfhydryl Compounds ; chemistry

OBJECTIVETo explore the potential effect of Guizhi plus Gegen Decoction (GGD) in improving learning and memory of lipopolysaccharides (LPS) induced neuroinflammatory mice and its possible mechanisms.

METHODSTotally 63 male ICR mice were randomly divided into 5 groups, i.e., the normal control (n = 13), the model group (n = 13), the low dose GGD group (n = 10), the high dose GGD group (n = 14), and the positive control group (n = 13). Mice were intraperitoneally injected with LPS (0.33 mg/kg) to induce Alzheimer's disease (AD) model. Mice in the high and the low dose GGD groups were administered with 12 g/kg or 6 g/kg by gastrogavage for 4 successive weeks. Mice in the control group were intraperitoneally injected with minocycline (50 mg/kg) for 3 days. By the end of treatment LPS were injected 4 h before behavior test each day, and then behavior test was conducted in mice of each group. Effect of GGD on learning and memory of AD mice was observed by using open field test, novel object recognition task, and Morris water maze.

RESULTSOpen field test showed there was no statistical difference in the movement time and the movement distance among all groups (P > 0.05), suggesting that LPS and GGD had no effect on locomotor activities of mice. In novel object recognition test, AD mice spent significantly shorter time to explore novel object after they were induced by LPS (P < 0.05), while for AD mice in the low and high dose GGD groups, their capacities for exploration and memory were significantly improved (P < 0. 05, P < 0.01). Results of Morris water maze showed that AD mice exhibited increased escape latency (P < 0.05) and spent much less time in swimming across the original platform (both P < 0.05). However, AD mice in the low and high dose GGD groups had obvious shortened latency and increased time percentage for swimming (P < 0.05, P < 0.01).

CONCLUSIONGGD possessed certain improvement in learning and memory disorder of LPS induced AD mice.

Alzheimer Disease ; chemically induced ; drug therapy ; psychology ; Animals ; Drugs, Chinese Herbal ; therapeutic use ; Lipopolysaccharides ; adverse effects ; Male ; Memory Disorders ; prevention & control ; Mice ; Mice, Inbred ICR ; Neuritis ; chemically induced ; drug therapy ; psychology ; Phytotherapy

The expressions of StAR (steroidogenic acute regulatory protein) mRNA in testes from 7,14,23 and 37 day-old piglets were studied by tissue in situ hybridization. The results indicated that in the testes of piglets, StARmRNA was expressed in Leydig cells of pig testes. The expression level of StARmRNA was lower in 7 days piglets but higher in 14,23,37 days. The results indicated that StAR gene played an important role in steroid biosynthesis.

According to the designed specific primers of gene fragment based on the Salvia miltiorrhiza transcriptome data, with the method of reverse transcription polymerase chain reaction (RT-PCR), this study cloned full-length cDNA sequence of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase gene from Salvia miltiorrhiza bge.f.alba, this sequence is named as SmHDS and its GenBank registration number is KJ746807. SmHDS, 2 529 bp long, contains an ORF of 2 229 bp, encodes 742 amino acids, including 5' UTR 170 bp and 3' UTR 130 bp. Using bioinformatics software, having made a homology analysis of the obtained sequence, we can have a conclusion that SmHDS have a close genetic relationship with HDS of Salvia miltiorrhiza. Analysis result of prokaryotic expression revealed that in Escherichia coli, SmHDS expressed target proteins which in size are comparable with the protein predicted. Meanwhile, the 4 factors which can influence the protein expression were optimized, the 4 factors are inducing temperature, inducing time, IPTG concentrations and density of inducing host bacterium (A600). The optimal expression conditions of SmHDS were 30 degrees C until the A600 is 0.6, and add IPTG to a final concentration of 0.2 mmol x L(-1), and the induction time of 20 h. It provides theoretical basis for the further study of the function of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase in the biosynthesis of tanshinone compounds.
Cloning, Molecular ; DNA, Complementary ; genetics ; Diterpenes, Abietane ; biosynthesis ; Enzymes ; biosynthesis ; genetics ; Escherichia coli ; metabolism ; Plant Proteins ; biosynthesis ; genetics ; Salvia miltiorrhiza ; enzymology ; genetics