Child, Preschool ; Echocardiography ; Electrocardiography ; Female ; Humans ; Immunoglobulins, Intravenous ; therapeutic use ; Infant ; Male ; Mucocutaneous Lymph Node Syndrome ; diagnosis ; drug therapy ; Retrospective Studies

Background Recurrence of pterygium is a common complication after the surgical excision of pterygium,and this procedure is related to cell proliferation,inflammation and neovascularization.Researches determined that rosiglitazone can suppress inflammation and neovaseularization and inhibit proliferation,hut few studies concerning the effect of rosiglitazone on pterygium were performed. Objective The aim of this study was to investigate the effect of peroxisome proliferator-activated receptor γ agonist on the proliferation and apoptosis of human pterygium fibroblasts(HPFs)in culture and search for a new drug to prevent and cure the recurrence after pterygium surgery. Methods Human pterygium samples were obtained during surgery and HPFs were cultured and purified using an explant method and 0.25%trypsin digestion,respectively.The identity of cultured HPFs was confirmed by immunohistochemistry using anti-vimentin and keratin antibodies.Rosiglitazone with the concentrations of 0(control),5,10,25,50,75,100,150,200,400μmol/L was then added in the culture medium for 12,24 or 72 hours.1%DMSO was used as blank control.The MTT method was used to assay the biologic effects of rosiglitazone on HPFs.Cell cycle distribution and apoptosis of HPFs after rosiglitazone treatment were studied by flow cytometic analysis.The expression of proliferating cell nuclear antigen(PCNA)mRNA in HPFs was detected by real-time PCR. Result Cultured HPFs radially migrated outward from the pterygium block,and then grew in long fusiform shape,showing positive response for vimentin and negative for keratin.The HPFs became round and thin with loose distribution after the addition of rosiglitazone.Following 25-125 μmol/L rosiglitazone administration for 12,48 or 72 hours,the A490 value of HPFs significantly declined with the increase of dosage(F=158.312,P=0.006)and lapse of time(F=1.924,P=0.135).Following the treatment of 25,75 or 125 μmol/L rosiglitazone for 24 hours,the number of HPFs in G0/G1 phase was markedly elevated;while the cell numbers in S phase decreased significantly in comparison with the control group(P＜0.05).The apoptotic rate of HPFs in the 25,75 and 125 μmol/L rosiglitazone groups significantly increased with the increase of rosiglitazone concentration(P＜0.05).Real-time PCR revealed that after 24 hours of rosiglitazone treatment,the expression of PCNA mRNA in HPFs was suppressed in a dose-dependent manner(F=3244.329,P＜0.05). Conclusion Rosiglitazone inhibits HPFs proliferation,arrests their cell cycle progression in G0/G1 phase,induces apoptosis of HPFs and depresses the synthesis of PCNA in a dose-and time-dependent manner.

Objective To investigate the effect of high concentration carbon dioxide preconditioning on lipid peroxidation during myocardial ischemia-reperfusion (I/R) in rabbits. Methods Twenty-four New Zealand white rabbits weighing 2.0-3.9 kg were randomly divided into 3 groups ( n = 8 each): sham operation group (group S) , I/R group, high concentration carbon dioxide preconditioning group (group H) . The amimals were tracheal intubated and mechanically ventilated. In groups S and I/R, fresh gas flow was set at 0.3 L/min (100% O2 ), respiratory rate 30-40 bpm and tidal volume IS ml/kg, and PETCO2 was maintained at 40-50 mm Hg for 30 min. In group H, fresh gas flow was set at 0.3 L/min (100% O2), respiratory rate 20-30 bpm and tidal volume 10 ml/kg, PETO2 was maintained at 75-85 mm Hg for 5 min, and then all the ventilatory parameters were adjusted to the same as those in groups S and I/R. Myocardial I/R was produced by occlusion of left anterior descending branch of coronary artery for 30 min followed by 3 h reperfusion after preconditioning in groups I/R and H. The animals were sacrificed at the end of reperfusion and myocardial tissues obtained for determination of the superoxide dismutase (SOD) activity and malondialdehyde (MDA) content and examination of the ultrastnicture of myocardium with the transmission electron microscope. Results The SOD activity was significantly lower, while MDA content higher in group I/R than in group S ( P ＜ 0.01) . The SOD activity was significantly higher, while MDA content lower in group H than in group I/R ( P ＜ 0.01) . The myocardial injury was attenuated in group H compared with group I/R. ConclusionHigh concentration carbon dioxide preconditioning can reduce myocardial I/R injury in rabbits through inhibiting lipid peroxidation.

Objective: To investigate the function of the ATP-sensitive K+(KATP) channel activation on the protective effect of hypercarbonic acidosis preconditioning on rabbit myocardial cells. Methods: Thirty-two rabbits were randomly divided into 4 groups (n = 8 for each group): pseudo-operation group (group P), ischemia and reperfusion group(group IR), hypercarbonic acidosis group(group H) and hypercarbonic acidosis+ glybenzcyclamide group (group H+G). Animals were ventilated normally in group IR and group P, tidal volume 15 mL/kg, breathing rate 35 bpm .The PETCO_2 was maintained at the level of 40-50 mm Hg for 30 minutes. Animals received low-frequency, low volume ventilation in group H group H+G, tidal volume 10 ml/kg, breathing rate 25 bpm to achieve hypercarbonic acidosis. The target value of PETCO_2 was 75-85 mm Hg. This value was maintained for 5 minutes. The animals then were ventilated normally to make the PETCO_2 return to 40-50 mm Hg. Animals were injected with 0.3 mg/kg glybenzcyclamide 10min before achieving hypercarbonic acidosis with hypoventilation in group H+G. Animals received ligation of left anterior branch artery for 30 minutes and reperfusion for 180 minutes in each group except P group. The myocardial ischemia area, the myocardial infarction area and their ratios were calculated by the ismaeil methods. Results: The ratio of the myocardial infarction area to the myocardial ischemia was significantly less in group H than those of group IR and group H+G (P < 0.01). The value of the ratio was similar between group H+G and group IR(P > 0.05). Conclusion: Hypercarbonic acidosis preconditioning can protect the cardiomyocytes by activating the KATP channel.

Animals ; Antioxidants ; therapeutic use ; Coronary Disease ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Free Radical Scavengers ; therapeutic use ; Humans ; Pancreatitis ; drug therapy ; Phytotherapy ; Salvia miltiorrhiza ; chemistry

Objective　To investigate the clinical significance and relationship among Pre-S2、6 common types of HBV serum immune markers(HBV-M)and HBV-DNA.Methods　Using PCR to detect HBV DNA and ELISA technique to detect Pre-S2,6 kinds of HBV-M in the meantime.Results　Positive infection rates of HBV DNA in 6 common types of the 1484 cases were 89.8%>55.6%>21.8%>7.5%>7.1%>6.8% respectively,namely the model (1)>(3)>(2)>(5)>(6)>(4);but the positive cases of HBV serum immune markers were in the order (2)>(1)>(3)>(4)>(5)>(6).The positive rates were significant difference between Pre-S2 and HBV DNA in (2)、(3) types (P<0.01) and no significant difference in other types(P>0.05).Conclusion　It is necessary to detect Pre-S2,HBV DNA and HBVserum immune markers,but HBV serum immune makers and Pre-S2 detected by ELISA only external indication and indirect evidence of HBV infection.While the detection of HBV DNA by PCR was direct evidence of HBV infection.Therefore they have their unique clinicl significance.

Objective To explore the risk factors contributing to wound complications following operative fixation for fractured calcanea.Methods Fitly-six patients with 61 fractured calcanea who had been treated with operative fixation from March 2000 to March 2003 were enrolled in investigation.General information of the pa- tients,ages,injury causes,classification of fracture,fall heights,smoking,delayed operation time,operation time and tourniquet time were documented preoperatively and postoperatively to be analyzed statistically.Results We report an overall wound complication rate of 14.8%(9/61).Wound infection,haematoma,dehiscence,heel necrosis and osteomyelitis were noted in our series.We identified the following as risk factors of postoperative wound compli- cations:1)fall from more than 3.4 m high(P＜0.05);2)delayed operation time less than seven days(P＜0.05); 3)operating time beyond two hours(P＜0.05);4)tourniquet time beyond 1.5 hours(P＜0.05).Conclusion In order to decrease wound complications following operative fixation tor fractured calcanea,surgeons should pertorm the operation 7 to 10 days after the injury,and reduce the operation time and tourniquet time.

The strain Streptomyces sp.,nominated IMB-14,was isolated from the soil sample of WuDang Mountain by the method of cellulose ester membrane filter.The studies on antibiotic activities,morphological characteristics,cultural characteristics,physiological characteristics,16S rDNA sequence analysis and the metabolite of strain IMB-14 showed that the strain IMB-14 was accordance with Streptomyces xanthoci-dicus.The study on the isolation and identification of strain Streptomyces xanthocidicus establishes a foundation on screening of novel antibacterial and antitumor agents.

BACKGROUND:At present, the confrontation of CAD/CAM systems and the lost wax casting method for marginal adaptation has been widely concerned, but the results are controversial. OBJECTIVE:To compare the marginal adaptation of single cobalt-chromium PFM crowns produced by 3 Shape CAD/CAM systems and the lost wax casting method. METHODS: A maxilary first premolar was prepared according to the standards. 50 resin-generation models were created by bi-color silicone rubber method and randomly divided into two groups: CAD/CAM group (A1-A25) and cast group (B1-B25). Al the models were cast in plaster. In CAD/CAM group, the digital impressions were obtained by optical scanning, then designed through computer and cut directly by NC miling machine. In cast group, metal ceramic crowns were made by the lost wax casting method. When crowns were al seated on the working dies, the marginal gaps were copied with light silicone rubber and then embedded with occlusal silicone rubber. The thickness of crown marginal gap was measured with a stereo microscope. RESULTS AND CONCLUSION:The average vertical clearance was (34.67±7.48)μm of CAD/CAM group, while (53.70±9.64)μm of the cast group; the difference was statisticaly significant between two groups (P < 0.05). The average level clearance was (37.61±7.63)μm of CAD/CAM group, while (53.02±10.65)μm of the cast group, and the difference was statisticaly significant between two groups (P < 0.05). Experimental findings suggest that, the marginal adaptation of single cobalt-chromium PFM crowns cast produced by 3 Shape CAD/CAM systems is clinical acceptable (< 120μm), and CAD/CAM systems of metal casting is obviously better than the lost wax casting in building metal based crowns with adaptable margin.

Objective To explore the way and effect of minimally invasive surgery of intracranial aneurysms.Methods 42 aneurysms from 40 patients were clipped under microscope, including 15 cases assisted with endoscope, 2 cases with neuronavigation and 2 cases with endovascular technique.Results 36 aneurysms were clipped, of which 2 were removed and 4 were wrapped. There were no parental arteries clipped incorrectly and no narrowing of the parental arterys under the helping of endoscope. Endovascular technique was applied in two large paraclinoid aneurysms, one was successfully clipped and the other was failed in procedure, but we dissected and clipped it at last by pressing the ICA. Two aneurysms were successfully located and removed under the help of neuronavigation.Conclusion Microneurosurgery combined with neuroendoscope, endovascularity and neuronavigation may reduce surgical injure and improve treatment effect.