Objective To incubate rat neural stem cells (NSCs) with selection-specific inhibitor ( LY294002) of PI3-K, and explore the effects of PI3-K/AKT signal transduction pathway in NSCs. Methods NSCs derived from E15-16 rats were isolated and cultured. After incubation of NSCs with different concentrations of LY294002 (0 to 40 μmol/L), cell survival ( WTS-8 assay), proliferation ( BrdU immunohistochemical identification), differentiation (β Tubulin-III immunohistochemical identification) and AKP phosphorylated protein (Western blotting) were detected. Results The effects of LY294002 on the survival, proliferation and differentiation of NSCs was concentration-dependent. The survival of the NSCs decreased significantly with a higher concentrations of LY294002 (25, 30, 35, 40 μmol/L) (P < 0. 05). The numbers of BrdU positive cells with LY294002 of 30, 35 and 40 μmol/L were significantly smaller than that of the control (LY294002 0 μmol/L) (P < 0.05). The numbers of β Tubulin-III positive cells with LY294002 of 35 and 40 μmol/L were significantly smaller than that of the control (P < 0. 05). The expression of AKT was blocked by LY294002 in a concentration-dependent manner. Conclusion PI3-K/AKT signal transduction pathway plays a vital role in the survival, proliferation and differentiation of NSCs.

Objective To evaluate the imaging features of ulcer-like projections (ULP)and penetrating atherosclerotic ulcers (PAU)of intramural hematoma(IMH)using dual-source CT (DSCT).Methods Retrospectively analysis of DSCT imaging data of 1 12 patients in our hospital was performed.The shape of hematoma and location of ULP and PAU were evaluated Stanford A and B IMH depicting on DSCT images.The maximum diameter of aorta,maximum thickness of hematoma,deepness of ulcer were com-pared between in patients of IMH with or without ULP and PAU.Results IMH manifested as circular or crescent high density on plain scan and without contrast enhancement on DSCT images in 1 12 cases.Among of them,68 cases(68/1 12,61%)of IMH had ULP or PAU,in which there were 21 cases(21/1 12,1 9%)with ULP and 47 cases(47/1 12,42%)with PAU,the mean maximum depth was (0.48±0.1 5)cm in ULP and (1.08±0.56)cm in PAU.There were 4 cases with ULP and 9 cases with PAU in 29 cases of Stanford type A,while 1 7 cases with ULP and 38 cases with PAU in 83 cases of Stanford type B.There were 14 cases with single ULP and 7 cases with multiple ULP in 21 patients with ULP,while there were 27 cases with single PAU and 20 cases with multiple PAU in 47 patients with PAU.There were 1 9 cases with both PAU and ULP.There was statistical significance that PAU occurred more likely in the descending aorta and distal aorta than that in ULP (P =0.028).Conclusion IMH patients are susceptible to ULP and PAU,DSCT can objectively evaluate CT features of ULP and PAU of IMH.

Objective To evaluate the etiology, pathogenesis, clinical manifestation, imaging features, treatments and factors related to prognosis of acute spinal spontaneous hematoma.Methods The clinical data of 38 patients with acute spinal hematoma treated in our hospital from 2011 till now were analyzed retrospectively.Duration of follow-up was 6 months.The factors influencing the prognosis were analyzed.Results Acute epidural hematomas (n=29) were much more common than subdural (n=5), subarachnoid (n=1) and intramedullary (n=3).Most hematomas were located in the cervical and thoracic vertebra regions.The etiology of acute spinal spontaneous hematoma was unknown in most patients.Twenty-nine patients were dealt with surgical intervention and 9 patients were treated conservatively.After 6-month follow up, recovery rate measured by JOA score in patients of spinal injury ASIA level A and B was (51.26 ±38.97), and level C, D and E was (80.33 ±25.83), P<0.05.Recovery rate in patients with hematoma discovered in less then 24 hours treated with surgical decompression was (64.79 ±36.10), and that in those with hematoma present over 24 hours was (34.54 ±30.17), P<0.05.Conclusions Acute spinal hematoma always caused by unknown etiology, and usually manifests itself in a sudden onset of pain and neurological deficits.The early diagnosis mainly depends on MRI.Patients presenting with severe neurologic dysfunction or showing signs of progressive deficit should have immediate surgical intervention. The status of neurological deficits before surgery and the length of interval between onset and surgical intervention are associated with recovery.

Arachidonic acid is an essential fatty acid in human nutrition and a biogenetic precursor of the biologically active prostaglandins and leukotrienes. ?~5 desaturase catalyzes the ?~5 dehydrogenation of di-homo-?-linolenic acid to form arachidonic acid in biosynthetic pathway of arachidonic acid. Using real time PCR technology,the transcriptional expression levels of gene encoding ?5 desaturase in three Mortierella alpina strains M10,M6 and M23,and in different growth phase of high arachidonic acid yielding strain M6,were determined. Results showed that there was a distinct corelationship between mRNA transcript level of ?~5 desaturase gene and biosynthesis of arachidonic acid. Results indicated that ?~5 desaturase plays an important role in arachidonic acid biosynthesis.

Integrative Medicine ; education ; Pediatrics ; education ; Teaching

Objective To explore the occurrence of surgical site infection(SSI)in patients in different levels of hospitals.Methods SSI among patients in 47 hospitals at 0:00-24:00 of May 16,2012 were investigated by medi-cal record reviewing,doctor inquiry,and bed-side visiting.Results A total of 5 977 surgical patients were investiga-ted,SSI prevalence rate was 1 .76%.SSI prevalence rate in secondary hospitals was higher than tertiary hospitals (χ2 =9.337,P =0.002);SSI prevalence rates in clean-contaminated and contaminated incision in secondary hospi-tals were both higher than tertiary hospitals (χ2 =4.315,8.129,both P <0.05);departments with high SSI preva-lence rates were general surgery,orthopedic,and neurosurgery;the major isolated pathogens were Escherichia coli , Staphylococcus aureus ,and coagulase negative Staphylococcus .Conclusion SSI rates of different types of incision and different departments are varied,corresponding prevention and control measures should be taken.

Objective To explore the value of N-terminal pro-brain natriuretic peptide (NT-proBNP) in assessing severity and predicting prognosis in children with severe hand-foot-mouth disease (HFMD).Methods A total of 119 eligible children with severe HFMD admitted in the pediatric intensive care unit were enrolled in this retrospective study from March 2012 to March 2014.According to NT-proBNP level,children were divided into ≤ 500 pg/mL group (n =70) and ＞ 500 pg/mL group (n =49) ; whereas according to severity,children were divided into severe-type (n =74) and critical-type (n =45) ; and based on 28 days outcome in children with critical-type HFMD,children were divided into fatal group (n =27) and survival group (n =18).The chi-square test,two-sample t test,rank sum test Pearson or Spearman' s correlation,area under the receiver operating characteristic curve (AUC) were used to analyze 119 children with severe hand-foot-mouth disease (HFMD).Results Within 24 hours after admission,NT-proBNP ＞ 500 pg / mL group had higher rates of fever,abnormal breathing,abnormal heart rate,abnormal systolic blood pressure,capillary refill time ＞ 2 seconds and higher levels of laboratory biomarkers than NT-proBNP ≤ 500 pg/mL group (P ＜ 0.05) ; and during hospitalization,the rates of pulmonary edema,pulmonary hemorrhage and death also higher than NT-proBNP ≤ 500 pg/mL group (P ＜ 0.05).NT-proBNP,BS,WBC were higher in critical-type group than severe-type group (P =0.00),while the PCIS (pediatric critical illness score) was lower in critical-type group (x2 =14.70,P =0.00).NTproBNP was higher in fatal group than that in survival group (t =-2.60,P =0.01),PCIS was lower in fatal group (Z=2.70,P=0.01); and there were no statistically significant differences in BS and WBC between fatal and survival groups (BS:t =-0.60,P=0.55; WBC:t =-0.72,P=0.48).NT-proBNP,BS and WBC were negatively correlated with PCIS (r values were-0.58,-0.46,-0.56,P values were 0.00).The AUCs of NT-proBNP,BS,WBC and PCIS to determine the severity of severe HFMD children were 0.94,0.80,0.74,and 0.97,respectively; and to predict 28 days survival in criticaltype HFMD were 0.73,0.56,0.53,and 0.73,respectively.Conclusions Higher level of NT-proBNP could prompt cardiopulmonary involvement.NT-proBNP could reflect the severity of illness and served as a sensitive marker in predicting 28-day survival,being better than BS and WBC.

Objective To investigate the effects of preoperative jaundice relieving on hemihepatectomy of hilar cholangiocarcinoma.Methods The clinical data of 18 patients who received preoperative percutaneous transhepatic cholangiography and drainage (PTCD) or endoscopic nasobiliary drainage (ENBD) before hemihepatectomy at the Tongji Hospital of Huazhong University of Science and Technology from January 2007 to January 2012 were retrospectively analyzed.The condition of the 18 patients (jaundice relieving group) was compared with that of 24 patients (non-jaundice relieving group) who did not receive PTCD or ENBD before hemihepatectomy.The differences in the pre-and postoperative blood loss,blood transfusion,operation time and postoperative incidence of complications between the 2 groups were analyzed.All data were analyzed using the t test or chi-square test.Results After PTCD or ENBD,the levels of total bilirubin (TBil),direct bilirubin (DBil),alanine aminotransferase (ALT) were (27 ± 5) μmol/L,(22 ± 6) μmol/L and (52 ± 42) U/L,which were significantly lower than (287 ± 120)μmol/L,(212 ± 86)μmol/L,and (267 ± 180)U/L before PTCD or ENBD in the jaundice relieving group (t =4.33,6.61,4.19,P ＜0.05).In the jaundice relieving group,left hemihepatectomy was performed on 14 patients,and right hemihepatectomy on 4 patients,and the radical resection rate was 16/18.In the nonjaundice relieving group,left hemihepatectomy was performed on 11 patients,and right hemihepatectomy on 13 patients,and the radical resection rate was 83.3％ (20/24).There was no significant difference in the radical resection rate between the 2 groups (x2 =1.09,P ＞ 0.05).The operation time,volume of intraoperative blood loss,volume of blood transfusion were (5.0 ± 0.8) hours,(562 ± 207) ml and (430 ± 317) ml in the jaundice relieving group,and (6.3 ± 1.5)hours,(815 ± 463)ml and (750 ± 146)ml in the non-jaundice relieving group,with significant differences between the 2 groups (t =4.77,7.80,4.65,P ＜ 0.05).The incidences of postoperative complications,bleeding and postoperative hepatic failure were 3/18,1/18 and 1/18 in the jaundice relieving group,and 75.0％ (18/24),33.3％ (8/24) and 33.3％ (8/24) in the non-jaundice relieving group,with significant differences between the 2 groups (x2=5.14,7.58,7.58,P ＜ 0.05).Conclusion Preoperative jaundice relieving could shorten the operation time and reduce the volume of intraoperative blood loss and the incidence of postoperative complications.

Objective To incubate the rat neural stem cells with specific inhibitor (PD98059) of MAPKK/MEK to clarify the effect of MAPKK/MEK-MAPK/ERK signaling pathway in neural stem cells (NSC).Methods NSCs derived fiom E15-16 rats were isolated and cultured.After treated with different concentration of PD98059,they were subjected to the detection of cell proliferation,Nesn'n, BrdU and β-tubulin-Ⅲ by WTS-8 assay,immunofluorescent staining or Western Blot respectively.Results PD98059 had an effect on the survival,proliferation and differentiation of NSC at a concentration-dependent manner.The viability of the NSC was significantly decreased than the control (P＜0.05),whereas the numbers of BrdU-positive and β-tubulin-Ⅲ positive cells were notably fewer than the control (P＜0.05) after incubated with the higher concentration of PD98059.The ERK expression was blocked by PD98059 at a concentration-dependent manner.Conclusion The MAPKK/MEK-MAPK/ERK signaling pathway played a vital role in the survival, proliferation and differentiation of NSC.

Objective To investigate the expression of human leukocyte antigen F (HLA-F) in hepatocellular carcinoma (HCC) tissues and to evaluate its relation to clinicopathological features and prognosis of HCC.Methods HLA-F expression of tumor lesions and their adjacent normal liver tissues from 115 HCC patients were analyzed by immunohistochemistry,and its relationship between HLA-F expression and the clinicopathological features and prognosis of HCC patients was also analyzed.Results HLA-F expression was positive in 47.0％ (54/115) of the HCC lesions and in 10.6％ (7/66) of the normal liver tissues (x2 =24.799,P ＜ 0.05).HLA-F expression in HCC lesions was significantly correlated with portal vein invasions (x2 =7.644,P =0.006),tumor number (x2 =4.210,P =0.040) and patient sex (x2 =6.759,P =0.009).The mean survival time of the HLA-F positive HCC patients was 34.0 months(95％ CI:27.5-40.5 months),which was significantly shorter than that of HLA-F negative HCC patients(44.6 months,95％ CI:38.3-50.9months) (x2 =5.148,P =0.023).HLA-F expression was an independent predictor of overall survival of HCC patients.Conclusions Positive HLA-F expression is negatively correlated with the prognosis of HCC patients.