Objective To investigate the changes of blood levels of gastrin(GAS),motilin(MTL) and insulinoid growth factor-1(IGF-1) in critical children with multiple organ disfunction syndrome(MODS).Methods The levels of GAS,MTL and IGF-1 in 50 critically ill children and 30 children without critical illness were detected.The control group consisted of 30 health children.All serum or plasma levels of GAS,MTL and IGF-1 were measured by radioimmunoassay.Results The serum or plasma levels of GAS,MTL and IGF-1 were significantly higher in critically ill children than those in uncritically ill children and control group(F=49.61,55.18,18.23 all (P

Akebia trifoliate has been reported to have many pharmacological activities and the roots, petioles and seeds are used to different symptoms. However, the structure and anatomy of its seeds was almost not reported until now. In the present study, we investigated the morphological characters of the fruit and seed, and the anatomical characters of the testa, micropyle, embryo and endosperm, which could provide evidences for the study on classification, identification and application of A. trifoliate. Our results showed that the testa of A. trifoliate consisted of an epidermic cell layer, the sclerenchyma cells layer, the parenchyma cells layer and an innermost pigment layer. At the micropylar region, the outermost epidermal cells were specialized the white caruncle-like structure and the testa included a lot of lignified tissues. Endosperm comprises two layer cells. Outermost yellowish-brown layer cells contains lots of fat droplets, and innermost white layer cells contains lots of aleurone grains and crystalloids.
Germination ; Magnoliopsida ; anatomy & histology ; growth & development ; Seeds ; anatomy & histology ; growth & development

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Animals ; Bone Marrow ; metabolism ; Brain ; metabolism ; Brain Neoplasms ; metabolism ; pathology ; CDC2 Protein Kinase ; metabolism ; Cell Line, Tumor ; Child ; Child, Preschool ; Female ; Gene Expression Regulation, Neoplastic ; Glioma ; classification ; metabolism ; pathology ; Humans ; Male ; Mice ; Mice, Nude ; Middle Aged ; Neoplasm Transplantation ; Neoplastic Stem Cells ; metabolism ; Young Adult

OBJECTIVETo investigate the occupational exposure levels of dust in new suspension preheated dry process (NSP) cement production line and put forward rectification measures for dust-exposed posts, and to provide ideas for the modern cement production enterprises in dust control and occupational health management.

METHODSOccupational health field investigation combined with field test were used to measure the time-weighted average concentration (C(TWA)) of the dust in the workplace. Rectification measures were taken for the dust-exposed posts with unqualified dust concentration, and the protective effects of dustproof facilities in the rectified workplace were evaluated.

RESULTSThe field investigation revealed incompletely closed dustproof facilities, improperly set dust hoods, excess of dust leakage points, and other problems in the dust-exposed posts of an NSP cement production line before rectification, and the dustproof facilities could hardly exert dust removal effect. The field test showed that the vast majority of dust-exposed posts had the dust concentrations exceeding the occupational exposure limits (OELs), with a qualified rate as low as 31.8%. A series of rectification measures were taken for these posts. After the rectification, the dust-exposed posts demonstrated dramatically dropped C(TWA), and the qualified rate of dust concentration in the dust-exposed posts rose to 90.9%.

CONCLUSIONThe dust hazards in NSP cement production line cannot be ignored. Taking appropriate protective measures are critical for curbing dust hazards in modern cement production.

Air Pollutants, Occupational ; analysis ; Construction Materials ; Dust ; analysis ; Humans ; Occupational Exposure ; analysis ; prevention & control ; Workplace

Aim To explore the inhibitory effect of Euonymus alatus on hepatic fibrosis induced by carbon tetrachloride (CCl4) in mice and its mechanism. Methods Eighty C57BL/6 male mice were randomly divided into eight groups: normal group, CCl4model group, Euonymus alatus(EA) ethanol extracts groups in early stage(EAE), EA ethanol extracts groups in later stage(EAL),two drug groups with low/medium/high dose(EAE-L/M/H, EAL-L/M/H), with 10 mice in each group. Fibrosis model was established by injecting CCl4in peritoneal cavity,and the study lasted for 30 days. Different doses of drugs were given from 1 st day to 15 th day in EAE while from 16 th day to 30 th day in EAL,then all mice were sacrificed to for the observation of the morphological changes and collage-nous fiber by HE and Masson staining. Liver index, ALT,AST and TNF-α were tested by ELISA. The ex-pressions of α-SMA and CollagenⅠwere measured by immunohistochemistry and Western blot. Results Compared to normal group, liver index, ALT, AST, TNF-α, α-SMA and CollagenⅠ in EA groups were lower than those in model group in a dose-dependent manner(P<0.01 or P<0.05). Liver morphology and collagenous fiber in EAE and EAL were better than those in model group in a dose-dependent manner. The effect of EAE were superior to that of the EAL in HE, Masson, α-SMA, Collagen Ⅰ indexes(P <0.05). Conclusions Euonymus alatus may inhibit the process of hepatic fibrosis in mice with dose-effect de-pendence, and drug treatment in early stage performs better,which may be related to the decrease of TNF-α that affects the expression of α-SMA and Collagen Ⅰ.

Objective:To establish a human lung squamous carcinoma cell line and to study its biological characteristics. Methods:Lung squamous carcinoma specimens were freshly resected during operation;the tissues were incubated in vitro and the cell line was named CHLH-1.The biological characteristics of the cells were studied by light microscopy,electron microsco- py,chromosome analysis and transplantation experiment.Results:Cells from the specimens of the primary tumor,the CHLC- 1 cell line and the cells from transplanted tumor possessed the characteristics of malignant squamous epithelium under light and electron microscope.The cell growth curve,doubling time and mitotic index were also observed in vitro.Nuclear chromosome analysis revealed that the tumor was a subtriploid with a mode of 60-68 per cell.Tumor nodes were observed under the skin of nude mice by heterogenic transplantation.Conclusion:The characteristics of the established cell line suggest that it is a newly established human squamous carcinoma cell line.

OBJECTIVETo investigate the effects of microRNA-144 (miR-144) expression on H9C2 (2-1) myocytes.

METHODSMiR-144 was up-regulated in primary cultured H9C2 (2-1) myocytes through transfection. Cells transfected with Lipofectamine(TM) 2000 and its mixture with miRNA synthesized randomly as blank control and negative control respectively. The up-regulation of miR-144 was confirmed by real-time PCR. Cell apoptosis was evaluated by means of CCK-8, Caspase-3 and flow cytometry.

RESULTSReal-time PCR results showed that the miR-144 expression was obviously increased in miR-144 up-regulation group (2178.84 ± 838.52) compared with negative (2.06 ± 0.73) and blank (1.00 ± 0.00) control group (all P < 0.01). The proliferation was lower, the activity of Caspase-3 was elevated and the apoptosis rates were significantly increased in miR-144 up-regulation group compared with negative and blank control group, while no significant difference was found between the latter 2 groups.

CONCLUSIONMiR-144 mimics may selectively up-regulate the expression of miR-144 in myocardial cells and consequently promote apoptosis and inhibit proliferation in myocardial cells.

Animals ; Apoptosis ; genetics ; Caspase 3 ; metabolism ; Cell Line ; MicroRNAs ; genetics ; metabolism ; Muscle Cells ; metabolism ; Rats ; Sincalide ; metabolism ; Transfection

Objective To explore the effects of radiofrequency catheter ablation(RFCA)on the blood coaguable states and the clinical value of perioperative plasma D-dimer.Methods The plasma level of D-dimer was assayed by enzyme-linked immunosorbent assay(ELISA)in blood samples of 30 children who were undertaken RFCA.Blood samples were consecutively obtained before cannulating,after electrophysiologic(EP)study,immediately after RFCA,the second day and the seventh day after RFCA.The centrifuged spead was 3 000 r/min,keep it for 10 minutes to obtain the upper plasma,and the crvopreserve.Results The plasma levels of D-dimer was highest at the time point when RFCA was successfully accomplished and restored to preoperative level in the seventh day after RFCA.There were statistically significant difference in the paried values at different time points(Pa

OBJECTIVETo study on the chemical stability of Salvia miltirrhiza hairy root.

METHODThe rolA gene was detected by PCR in DNA and the chemical contituent variances were detected by HPLC.

RESULTThe rolA gene was found in all the 10 batches of the culfured hairy root. The similarities of the chromatographic fingerprints of the 10 batches are higher than 0. 95.

CONCLUSIONThere are no significant differences of the chemical constituents in 10 hairy root samples.

Chromatography, High Pressure Liquid ; DNA, Plant ; genetics ; Drugs, Chinese Herbal ; chemistry ; Genes, Plant ; Plant Roots ; chemistry ; genetics ; Polymerase Chain Reaction ; Reproducibility of Results ; Salvia miltiorrhiza ; chemistry ; genetics ; Sensitivity and Specificity

OBJECTIVEOur previous cDNA array data have shown that expression level of CDK1 increased along with the malignant progression of ganglioglioma, and decreased with the differentiation process of neural stem cells. The purpose of this study was to investigate the CDK1 expression levels in gliomas and the effects of CDK1 knockdown on phenotype of glioma cells.

METHODSGlioma tissue array was constructed, which was composed of surgical specimens of gliomas with different malignancy grades, glioma xenografts in nude mice, cellular spheroids of brain tumor stem cells, normal neural stem cells and glioma cell line. CDK1 expression was detected in glioma tissue array with immunohistochemical techniques. CDK1 expression in human brain glioma cell line and relevant xenogeneic graft tumor was inhibited by retroviral vectors expressing short hairpin RNAs (shRNAs). Both in vitro and in vivo changes of biological characteristics were further observed.

RESULTSThe expression level of CDK1 increased along with the malignancy progression of glioma in clinical specimens. The positive expression rates of CDK1 in human brain glioma tissues were 22.2% (grade I), 40.0% (grade II), 69.6% (grade III) and 78.6% (grade IV), P = 0.01, respectively. The positive expression rate of CDK1 in glioma cell line and implanted xenografts was similar as the clinical tumors with high malignancy, and higher than those in neural stem cells and brain tumor stem cells (P = 0.0014). Expression of CDK1 was high in human fetal brain tissues and bone marrows of nude mice, but low in normal adult human brain tissues. Downregulation of CDK1 inhibited the proliferation activities notably both in SHG-44 cells in vitro and relevant xenogeneic graft tumors, and induced apoptosis of tumor cells prominantly as well.

CONCLUSIONOverexpression of CDK1 may promote oncogenesis and progression of human gliomas. Downregulation of CDK1 expression can inhibit the proliferation activities of human malignant gliomas.

Animals ; Apoptosis ; drug effects ; Astrocytoma ; genetics ; metabolism ; pathology ; Brain Neoplasms ; genetics ; metabolism ; pathology ; Brain Stem Neoplasms ; metabolism ; CDC2 Protein Kinase ; genetics ; metabolism ; Cell Cycle ; drug effects ; Cell Differentiation ; drug effects ; Cell Line, Tumor ; Ganglioglioma ; genetics ; metabolism ; pathology ; Gene Expression Regulation, Neoplastic ; Gene Silencing ; Glioma ; genetics ; metabolism ; pathology ; Humans ; Mice ; Mice, Nude ; Neoplasm Staging ; Neoplasm Transplantation ; RNA, Messenger ; metabolism