AIM:To compare the efficacy of three types of eye care (artificial tear, moist chamber and polyethylene covers) for preventing exposure keratopathy in intensive care patients.METHODS: Intensive Care Unit (ICU) patients were randomly divided to three treatment groups, including artificial tear group(29 cases), moist chamber group (27 cases) and polyethylene covers group (28 cases). Patients in artificial tear group received two drops of carboxymethylcellulose dropped to each eye every 2 hours. The moist chamber and polyethylene covers groups were changed every 12 hours or as needed if they became unclean or torn. Corneal fluorescein stain was performed daily.RESULTS:No one in the polyethylene covers group and one case(4%) in the moist chamber group had exposure keratopathy compared to 8 cases (28%) in the artificial tear group. There were statistical significance differences between both artificial tear group and moist chamber group (P=0.02), artificial tear group and polyethylene covers group (P=0.003). Everyday time of eye care in the artificial tear group, the moist chamber group and the polyethylene covers group was respectively 26.69±2.39, 35.33±2.63 and 7.48±0.87 minutes. Everyday time of eye care in the polyethylene covers group was statistically more time-saving than that in the artificial tear group (P<0.01) and the moist chamber group (P<0.01). CONCLUSION: Polyethylene covers are more effective and time-saving in reducing the incidence of corneal damage in intensive care patients.

Chronic Disease ; prevention & control ; Humans ; Population Surveillance ; methods

Objective To analyze the core authors, and their organizations, geographical regional distribution of Chinese Journal of Orthopaedics. Methods The core authors, coauthors and their organizations whose articles were published in Chinese Journal of Orthopaedics between 1995 and 2004 were quantitatively analyzed using literature search through CMCI, which programmed by the People's Liberation Army Medical Library and their geographical regions distribution, the organizations of whom had high quantitative publication were determined using literature metrology methods. Results There were 2660 articles published in Chinese Journal of Orthopaedics between 1995 and 2004. All of 1123 authors of 2660 articles had only one article published which accounted for 69.67% of total first authors on the Chinese Journal of Orthopaedics in ten years. There were 2385 articles with one or more coauthors and the cooperative rate was 89.66%, and cooperative degree was 4.11 in the period of time. There were 275 articles with single author, which accounted for 10.34% of total articles. The articles written by the authors from military hospitals, university affiliated hospitals and provinces-level hospitals were 646(24.28%), 1091(41.01%) and 706(26.54%), respectively during the period. There were 218 core authors with 959(36.05%) articles published and there were 20 high-quantities organizations with 1007(37.86%) articles published in this study. The number one region of published articles was Beijing with 667(25.08%) articles. There were 2443 (91.84%) articles pressed from the organizations of affiliated hospitals of universities, provinces-level hospitals and army hospitals. Among them, Tianjin hospital (101 articles), Beijing Jishuitan hospital (100 articles) and affiliated Xijing hospital of the 4th military medical mniversity (79 articles) occupied 10.53% of the pressed papers and they were in the first three positions. Conclusion Authors of Chinese Journal of Orthopaedics have a wide distribution and highly cooperative rate. There were a group of active and talented core authors who has a great influence on the journal.

Objective To introduce a new method of septal cartilage augmentation for hump nose plasty. Methods The section of septal cartilage was collected and divided into two or three parts. The grafts were sutured by means of a mattress suture, and placed over the dorsum of superior and inferior hump. The dorsum became flat and straight immediately afterward. Results After a short term and long term follow up, 30 patients who underwent this operation were satisfied the operative results. Conclusion Septal cartilage augmentation for hump nose plasty is an efficient new method.

OBJECTIVE:To study the influencing factors for the extraction of the genomic DNA from Paeonia Suffruticosa.METHODS:Taking Paeonia Suffruticosa(root bark of Chinese medicinal herb) as material to investigate the influencing factors including concentrations of the NaCl and beta-mercaptoethanol,temperature and time of water bath,RNaseA,PCR(polymerase chain reaction) system etc in the buffer solution on the basis of modified CTAB method.RESULTS:The DNA obtained by modified CTAB method was pure,integrated,with the value of A260/A280 ranged from 1.8 to 2.0,the ampl-ified bands of PCR were clear and bright,which lay a solid foundation for the following molecular biology experiments.CONCLUSION:The modified CTAB method is economical,rapid and efficient,and it can be served as an extraction of genomic DNA from root bark Chinese medicinal herb as well as a theoretical basis for full scale production.

Objective To investigate the alteration of aquaporin 1(AQP1) expression in lung tissues in hemorrhage-lipopolysaccharide(LPS) two-hits rats and the effects of panaxadiols(PDS)and dexamthasone(Dex) on it.Methods The rat model of acute lung injury was built with hemorrhage-LPS two hits.The experiment was divided into control group(S),two-hits model group(HL),DEX group(HLD),and PDS group(HLP).The pathological changes of lung tissue were examined by HE staining.The expression of AQP1 was analyzed by RT-PCR,Western blotting and immunohistochemical staining.Results ① Significant inflammatory changes in pulmonary interstitial of rats in HL group were observed.However,in HLD group and HLP group,the pulmonary pathologic changes were much slighter.② AQP1 mRNA and protein expressions in lung tissues in HL group were significantly decreased compared with others groups(P

Objective To study the early therapeutic principle of severe acute pancreatitis(SAP)complicated with intra-abdominal hypertension(IAH).Methods We reviewed 32 cases SAP complicated with IAH from January 2003 to January 2008 in our department.All cases' clinical features and early management were summarized.Results The intra-abdominal pressure of all the cases was above 15cmH2O.5 deaths occured in non-operation treated cases,6 deaths in the 11 operated cases,and all the dead cases reached the standard of ACS.Conclusions The uses of early individualized treatment can decrease the opportunity of decompressive operation,we can effectively improve the therapeutic effect of SAP complicated with IAH and reduce the probability of complicating with ACS.

Background Neurotransmitter secretion disorder induced by chronic manganese poisoning has always been one of the important causes of body injury, but the mechanism of neurotransmitter secretion disorder caused by manganese is not clear at present. Objective To investigate the effects of presynaptic membrane intracellular protein 13-1 (Munc13-1) and synapse fusion protein binding protein 18-1 (Munc18-1) on dopamine secretion dysfunction induced by manganese chloride (MnCl₂) in human neuroblastoma (SH-SY5Y) cells. Methods A SH-SY5Y cell model induced by MnCl₂ was established. Cell viability was measured by MTT assay. Four experimental groups were set up: control group and low-, medium-, and high-dose manganese groups (0, 100, 200, and 400 μmol·L⁻¹ MnCl₂). They were treated with corresponding doses of MnCl₂ for 24 h. The secretion of dopamine was measured by enzyme-linked immunosorbent assay. The mRNA expression of Syntaxin-1 was detected by real-time quantitaive PCR. Total cell proteins were extracted, and the protein expression levels of Munc13-1, Munc18-1, and Syntaxin-1 were detected by Western blotting. The correlations of MnCl₂ exposure and dopamine secretion with the protein expressions of Munc13-1 and Munc18-1 were also analyzed by Pearson correlation. Results Compared with the control group, the cell viability rate decreased gradually with the increase of manganese exposure concentration, and the difference between the medium- and the high-dose manganese groups was statistically significant (P<0.05). The concentration of dopamine in cell culture medium of all manganese exposure groups decreased with the increase of manganese concentration, and compared with the control group and the low-dose manganese group, the medium- and the high-dose manganese groups were statistically significant (P<0.05). The expression of Syntaxin-1 at mRNA or protein level did not change significantly among groups (P>0.05). Compared with the control group, the protein expression of Munc13-1 decreased and that of Munc18-1 increased with the increase of manganese concentration (P<0.05). Compared with the low-dose manganese group, the changes of Munc13-1 protein in the high-dose manganese group and Munc18-1 protein in the medium- and high-dose manganese groups had statistical significance (P<0.05). Compared with the medium-dose manganese group, the protein changes of Munc18-1 in the high-dose manganese group were statistically significant (P<0.05). The correlation analysis showed that MnCl₂ dose was negatively correlated with Munc13-1 protein expression (r=−0.898, P<0.05), and positively correlated with Munc18-1 protein expression (r=0.678, P<0.05). Dopamine secretion was positively correlated with Munc13-1 protein expression (r=0.932, P<0.05), and negatively correlated with Munc18-1 protein expression (r=−0.817, P<0.05). Conclusion The inhibition of dopamine secretion in SH-SY5Y cells induced by manganese exposure is related to up-regulation of Munc18-1 and down-regulation of Munc13-1 expression levels, which may be one of the reasons for nerve injury caused by manganese.

Objective Previous study showed that the histopathological basis of visual function damage caused by optical nerve injury is apoptosis of retinal ganglion cells(RGCs). This procedure is regulated by P53, bax and caspase 3 genes. Present study aimed to observe the expression of bax, P53 and caspase 3 mRNA in RGCs after traumatic optic nerve damage in the rats by SYBR green I fluorescence quantitative PCR method. Methods The animal model of optic nerve injury was established in the right eyes of 56 adult Wistar rats by a fluid percussion brain injury device (FPI) . Animal were killed on days 1, 3, 5, 7, 9, 14, 28 days separately after injury. Other 16 Wistar rats were divided into normal control group and sham operation group. The total RNA was isolated from rat fresh retina tissue by Trizol method and was treated by reverse transcription to cDNA using 01igo(dt) 18 as primer and then amplified. The target fragments of bax, P53 and caspase 3 cDNA were linked with carrier pTZ57 R/T to construct recombined plasmids which were transformated to E. Coli DH5α by T/A clone method. Recombined plasmids were extracted with alkaline lysis method and the plasmids were selected in white colonies by ampicillin screening, EcoR I restrictive enzyme analysis, and their specificity was evaluated using DNA sequencing. The standard curves were created by plasmid DNA and the precise expression level of target genes in samples were determined using software. The results were expressed as the ratios of target gene mRNA to GAPDH mRNA. Results The standard curve drawn by pTZ57R/T and target gene presented a good linear tendency with the higher sensitivity and specificity. The expression of P53 and bax mRNA began to increase on the third day after the injury of optic nerve and peaked on the fifth day and started to decline on the seventh day. The expression of caspase 3 mRNA increased from the fifth day through the ninth days after injury and declined on the fourteenth day. The significant differences were found in the expression of P53, bax and caspase 3 between model group and control group (P ＜ 0. 05) . Conclusion The pro-apoptotic protein P53, bax and caspase 3 play an important role in RGCs apoptosis.

Objective To study calcium chelator BAPTA-AM antagonize the cellular oxidative stress induced by hydrogen peroxide ( H2 O2 ) and to explore the effect of calcium ion on the cell degeneration mediated by NLRP3.Methods The SHSY5Y cell model of oxidative stress was made by hydrogen perox-ide,then the cell model was treated with calcium ion carrier A23187 or BAPTA-AM,a higher efficiency cal-cium chelating agent.The cells were divided into 4 groups:H2O2 treatment group,H2O2+A23187 group, H2 O2+A23187 +BAPTA-AM group and control group.NLRP3 protein was detected by Western blot,and Caspase-1 and IL-1βwere detected by ELISA.Results NLRP3 expression was significantly increased in cells treated by hydrogen peroxide(P<0.05) .The NLRP3 protein continued to increase, and the expression of Caspase-1((57.1±19.2)pmol/L) and IL-1β((484.2±49.5)pg/ml) protein was also increased signifi-cantly in cells treated by A23187,and the difference had statistically significant for caspase-1 or IL-1βin H2O2+A23187 group compared with those in control group(Caspase-1:(26.8±12.9)pmol/L,IL-1β:(326.9 ±52.1) pg/ml) (P<0.05, P<0.01) .NLRP3,Caspase-1 and IL-1βwere all significantly reduced after adding a high-er efficiency calcium chelating agent BAPTA-AM.Conclusion Calcium overload is likely to enhance the oxidative stress induced by hydrogen peroxide and engender neurodegeneration mediated by NLRP3 inflammasome.