Cardiovascular Diseases ; diagnosis ; therapy ; Humans ; RNA Interference

Connexin 43 ; genetics ; Connexins ; genetics ; Heart Defects, Congenital ; genetics ; Homeobox Protein Nkx-2.5 ; Homeodomain Proteins ; genetics ; Humans ; Infant ; Infant, Newborn ; Mutation ; genetics ; Myocardium ; metabolism ; Transcription Factors ; genetics

Aclarubicin ; therapeutic use ; Adolescent ; Adult ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cytarabine ; therapeutic use ; Female ; Glutethimide ; administration & dosage ; analogs & derivatives ; Granulocyte Colony-Stimulating Factor ; therapeutic use ; Humans ; Leukemia, Myeloid, Acute ; drug therapy ; Male ; Middle Aged ; Treatment Outcome ; Young Adult

Objective To study the protective earth requirement for touched metal parts of medical electrical equipment to improve the manufacturer's understanding on national standards.Methods The isolation methods for the touched metal parts in national standards were studied,and the principle of protective earth combined with insulation separating was analyzed.The characteristics of the second isolation method was discussed,and the respiratory system structure and electroshock protection of the anaesthetic machine were taken as examples.Results The touched metal parts with no measures for grounding,double isolation or reinforced insulation was determined by structure detection to meet the requirements of national standards in case basic insulation ceased to be effective and the parts were uncharged.Conclusion The necessities to girt the touched metal parts with measures for grounding,double isolation or reinforced insulation should depend on the understanding on national standards and electrical construction of the equipment under test by structure detection.

Objective To develop a portable automatic tourniquet.Methods Using microcomputer and pressure sensor,the pressure and hemostatic time of current pressurized tourniquet were controlled.Results Portable automatic tourniquet was composed of gasbag pressurized bandage,electric micro-pump,pressure sensor,preamplifier,impact damper,A/D converter,single-chip micro-computer controller,data memory,keyboard and its interface circuit,display and its interface circuit,photoelectronic control circuit,etc.Conclusion Portable automatic tourniquet is small,light,safe and convenient.Besides,rapid hemostasia and automatically controlled & stable pressure enable it to be used both in the war and at peace time.[Chinese Medical Equipment Journal,2008,29(2):21-23]

Objective To annalyze the effect of launching blood virus nucleic acid test(NAT) centralization in Chongqing Municipal Blood Center.Methods The various links and key control points in the aspects of the transportation,detection and information system of 32 137 centralized test specimens submitted from 14 basic level local blood stations in Chongqing counties from January 2016 to June 2016 were analyzed.Results Among 32 137 centralized specimens from January to June 2016,55 specimens were rejected for various reasons,the NAT single reactive rate was 5.1‰(164/32 137),which in the Chongqing Municipal Blood Center was 2.3‰(129/55 859)during the same period.The identification detection rate in the basic level blood station was 1.8‰(57/32 137),while which in Chongqing Municipal Blood Center was only 0.6‰(35/55 859).Conclusion The effects of launching centralized NAT have already gradually emerged in Chongqing Municipal Blood Center.The detection ability and level have differences between the laboratory of basic level blood station and blood screening laboratory of blood center.Gradually increasing the centralized test degree conduces to comprehensive improvement of blood detection efficiency and blood saftey.

Objective To explore the electrophysiological properties and the disparity of visual cortical neurons in developing rats. Methods Whole cell patch clamp recording and intracellular labeling of brain slices were performed on rats at postnatal 14 and 28 days. The electrophysiological data were analyzed according to the cellular input resistance and resting membrane potential. Results When the input impedance of visual cortical neurons(IR) was lower, increased peak value of postsynaptic currents(PSCs), prolonged rise and decay time were found. At postnatal 14th day(before eyes opened), the intermediate cells and mature cells were 59.2% and 14.9% respectively, but at postnatal 28th day(14 days after eyes opened), the mature cells and immature cells were 62.5% and 12.5% respectively. Conclusion During the period of postnatal development, the visual cortical neurons become mature gradually, but maturation is not completely correlated with age.

OBJECTIVETo explore the effect of total flavonoids of Herba Epimedium (FHE) on BMP-2/RunX2/OSX signaling pathway in promoting osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs).

METHODSPassage 3 BMSCs were randomly divided into the control group, the experimental group, and the inhibitor group. BMSCs in the control group were cultured in 0.2% dimethyl sulfoxide + Osteogenuxic Supplement (OS) fluid + DMEM/F12 culture media. BMSCs in the experimental group were intervened by 20 microg/mL FHE. BMSCs in the inhibitor group were intervened by 20 microg/mL FHE and 1 microg/mL NOGGIN recombinant protein. At day 9 alkaline phosphatase (ALP) activity was measured. Calcium nodules were stained by alizarin red staining and the density was observed. The transcription expression of osteogenic differentiation-related proteins (type I collagen, osteocalcin, and osteopontin) and related factors of BMP-2/RunX2/OSX signaling pathway was assayed by RT-PCR.

RESULTSCompared with the control group, ALP activities were enhanced and the density of calcium nodules significantly increased; type I collagen, osteocalcin, and osteopontin expression levels were increased in the experimental group. The expression of osteogenesis-related transcription factor was also increased in the experimental group. Noggin recombinant protein inhibited FHE promoting BMSCs osteogenesis in the inhibitor group. Compared with the experimental group, ALP activity decreased (P < 0.05), the density of calcium nodules was lowered, expression levels of type I collagen, osteocalcin, osteopontin significantly decreased (P < 0.05) in the inhibitor group.

CONCLUSION20 microg/mL FHE promoted osteogenic differentiation process of BMSCs by BMP-2/RunX2/OSX signaling pathway.

Bone Morphogenetic Protein 2 ; metabolism ; Cell Differentiation ; drug effects ; Cells, Cultured ; Collagen Type I ; metabolism ; Core Binding Factor Alpha 1 Subunit ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Epimedium ; chemistry ; Flavonoids ; pharmacology ; Humans ; Mesenchymal Stromal Cells ; cytology ; drug effects ; Osteocalcin ; metabolism ; Osteogenesis ; drug effects ; Osteopontin ; metabolism ; Signal Transduction ; Sp7 Transcription Factor ; Transcription Factors ; metabolism

Objective To observe the differences of cerebral activation pattern with resting state functional magnetic resonance imaging (rs-fMRI) between patients with spasmodic torticollis (ST) and healthy controls,thus to investigate the pathogenesis of ST.Methods Nineteen ST patients and 21 age,sex and education-matched healthy controls,recruited from the Department of Neurology,First Affiliated Hospital of Guangxi Medical University between November 2012 and January 2016,were included in this study.rs-fMRI and factional amplitude of low frequency fluctuation (fALFF) were used to obtain differences between patients with ST and healthy controls,and correlative analysis was made on fALFF values of abnormal brain regions and ST patients' symptom severity (Tsui scores).Results Compared with healthy controls,patients with ST had significantly increased fALFF in the left cerebellum and significantly decreased fALFF in the left posterior cingulate cortex/precuneus,right posterior cingulate cortex/precuneus,left middle temporal gyrus,right angular gyrus,left post-central gyrus,right supplementary motor area (t =-5.714-5.920,P ＜0.01),and abnormal brain regions' fALFF values had no correlation with patients' age of onset,disease course,symptom severity (P ＞ 0.05).Conclusion Abnormal sensorimotor area,default mode network and cerebellum dysfunction may play a role in the pathophysiology of ST.

In order to further study mouse embryonic stem cells(ES cells),lentiviral vector PLL-IRES-Nanog-Neo was constructed.Mouse ES cells overexpressed nanog by mediation of lentiviral were cultured on mouse fetal fibroblast feeders after 2 weeks under G418 media and examined according to gowth characteristics. Results were showed that 918 bp nanog fragments were expressed in mouse ES cells mediated by lentiviral vector PLL-IRES-Nanog-Neo,mouse nanog-ES cells were taken on mass-like image and positve with alkaline phosphatase staining and Oct4 and SSEA1 immunocytochemistry under no LIF condition in the media. It is concluded that mouse ES cells Elevated nanog gene expression by mediation of lentiviral were constucted and cultured.