After a brief description of the background and present situation of knowledge service in domestic college and university libraries,the knowledge service model,knowledge service team framework and main knowledge service contents were analyzed with the practice and experiences of knowledge service in our library introduced.

Objective To investigate the effects of Atorvastatin Combined with valsartan on the degree of coronary artery lesion and the level of serum lipoprotein and C reactive protein in patients with coronary heart disea.Methods 95 cases of patients with coronary heart disease from September 2015 to September 2016 in our hospital were randomly divided into observation group and control group,the control group were treated with atorvastatin,observation group of patients in the control group patients on the basis of the combination of valsartan treatment,severity of coronary artery disease,serum lipid and protein levels in patients with C reaction protein levels before and after treatment were compared between two groups.Results After treatment,the patients in the observation group were fibrous plaque,calcified plaque,lipid plaque,mixed plaque were significantly decreased,and lower than that of control group,and control group before and after treatment of fibrous plaque,calcified plaque had no obvious change after treatment,the observation group were HDL,LDL,TG,TC were(2.12±1.01),3.27±0.94),(1.53±0.98),(3.35±1.78)was significantly higher than the control group,the difference was significant,2 months after treatment,3 months to observe the levels in patients with C reactive protein were(10.27±1.78)and(7.26±2.63)was significantly lower than the control group with significant difference,with statistical significance(P<0.05).Conclusion Atorvastatin Combined with valsartan can help to reduce the coronary plaque,regulate lipid metabolism,reduce the level of C reactive protein.

Objective To explore the clinical application significance of quantitative detection of minimal residual leukemia cells in peripheral blood in acute leukemia patients.Methods Using PCR amplification of quantitative method of limited dilution,the FLT3 gene was detected in blast cells of peripheral blood from 25 newly diagnosed cases of acute leukemia,and the number of minimal residual leukemia cells in newly diagnosed cases and the cases after one course of chemotherapy was calculated respectively.10 healthy subjects were used as control group.Results ①The positive rate of FLT3 gene in 25 newly diagnosed cases of acute leukemia sample was 80%(20/25),the positive rate in acute myeloblastic leukemia(AML) patients was 88.2%(15/17)and in acute lymphocytic leukemia(ALL)was 62.5%(5/ 8).②The mean DNA content in peripheral blood in 20 cases with FLT3 positive expression in newly diagnosed group was(2.36?1.25)?108 ?g?L-1,being equal to(18.66?8.79)?106 leukemia cells in every microliter peripheral blood.After one course of chemotherapy ,there was 1 case without remission,the DNA content in peripheral blood was 1.69?107?g?L-1,being equal to 1.01?106 leukemia cells in every microliter peripheral blood;there were 3 cases with partial remission,the mean DNA content in peripheral blood was(0.57?0.24)?106 ?g?L-1,being equal to(1.82?0.19)?103 leukemia cells in every microliter peripheral blood.There were 9 cases with complete remission with FLT3 negtive expression,and 7 cases with complete remission with FLT3 positive expression,the mean DNA content in peripheral blood was(0.16?0.06)?106 ?g?L-1,being equal to(1.86?1.31)?102 leukemia cells in every microliter peripheral blood.Conclusion The quantitative and periodic detection of minimal residual leukemia cells would help to evaluate leukemia chemotherapy efficiency and to adjust treatment scheme in time.

OBJECTIVE To analyze antibiotic resistance pattern and use pulsed-field gel electrophoresis(PFGE) to study the molecular epidemiology of Pseudomonas aeruginosa isolated from burn unit. METHODS P.aeruginosa had been isolated and tested by K-B method from clinical samples and antibiotic resistance was analyzed and studied retrospectively. RESULTS The drug resistance of P.aeruginosa to nine antibiotics was high,the multiple drug resistance rate was 30%. CONCLUSIONS The resistance rates to commonly used antibacterials in P.aeruginosa are high and the resistance pattern is wide.PEGE is a better genotyping method to study molecular epidemiology and analytic homology.

Objective To evaluate the effect of the combination of dexmedetomidine and sufentanil on monitoring anesthesia care during burr-hole surgery for patients with chronic subdural hematoma. Methods 96 pa-tients underwent burr-hole surgery for chronic subdural hematoma with MAC were randomly divided into two groups:Group D and Group DS (n=48 in each group). Local anesthetic block was started at least 10 min after DEX and sufentanil infusion. Ramsay sedation scale of the two groups was maintained to 3. Anesthesia onset time, hemo-dynamics, the amount of rescue midazolam or fentanyl, the time to first dose of rescue midazolam or fentanyl, the to-tal number of intraoperative patient movements, postoperative recovery time, patient and surgeon satisfaction scores, and the adverse events were recorded. Results Compared with group D, anesthesia onset time was significantly less in group DS (13.68 ± 3.13 vs. 11.82 ± 2.43 min, P=0.002). More patients in group D required rescue midazol-am to achieve RSS=3 compared with group DS (31.25%15/48 vs. 12.50%6/48, P=0.023). Compared with group D, significantly fewer patients in group DS required rescue fentanyl to relieve pain (10.42%5/48 vs. 27.08%13/48, P = 0.036). Additionally, the total dose of rescue fentanyl in group DS was significantly higher (89.48 ± 23.27 vs. 125.28 ± 33.52μg, P=0.000), and the time to first dose of rescue fentanyl was longer than group D(18.34 ± 4.45 vs. 14.34 ± 3.63 min, P=0.000). The total number of patient movements during the burr-hole surgery was higher in group D than group DS (35.42%17/48 vs. 16.67%8/48, P=0.036). The time to recovery for discharge from the PA-CU (time to an Aldrete score ≥ 9) was significantly shorter in group DS compared with group D (17.54 ± 5.92 vs. 12.57 ± 5.28 min, P=0.000). Results from the patient and surgeon satisfaction scores showed significant differenc-es favoring group DS (P<0.05). More patients in group D showed higher levels of the overall incidence of bradycar-dia (37.50% 18/48 vs. 18.75% 9/48, P = 0.041) and hypotension(37.50%18/48 vs. 14.58%79/48, P=0.011)com-pared with group DS. Conclusions Compared with DEX alone, DEX-sufentanil associated with fewer number of in-traoperative patient movements, less amount of rescue scheme, could be safely and efficiently used for MAC during burr-hole surgery for patients with chronic subdural hematoma.

Objective To optimize microwave-assisted extraction of polyphenols from Enteromorpha prolifra.Methods Based on single-factor tests,an efficient microwave-assisted extraction(MAE)technique was developed to extract bioactive polyphenols from E.prolifra through orthogonal L16(4)5 test.Results The highest yield(0.923±0.013)mg/g was obtained when microwave power,solvent to raw material ratio,irradiation time,ethanol concentration,and extraction cycles were 500 W,25 mL/g,25 min,40%,and 3,respectively,which was higher than that of Soxhlet extraction with methanol for 6 h,ultrasound-assisted extraction with 40% ethanol for 1 h twice and heat reflux extraction with 40%ethanol for 2 h twice.Conclusion This finding indicates that MAE is a superior technique for the extraction of polyphenols due to less impurity,higher time efficiency and yield.

OBJECTIVE: To investigate the functional mechanism of metadherin (MTDH), hypoxia-inducible factor-1 alpha (HIF-1α) and transketolase-like gene 1 (TKTL1) and their interaction with each other in laryngeal carcinoma development. METHOD: Thirty laryngeal carcinoma samples and 20 samples of para-carcinoma tissue were taken from the patients received operation treatment. The expression levels of MTDH, HIF-1α and TKTL1 were detected in all the samples by SP immunohistochemical methods. The data were analyzed by the SPSS13.0 statistical software. RESULT: The positive expression rate of MTDH, HIF-1α and TKTL1 in the 30 cases of laryngeal carcinoma was 56.67%, 60.00% and 63.33%, respectively, which was 20.00%,10.00% and 15.00% respectively in the para-carcinoma tissue, the difference of the positive expression rate of the tested objects between these two groups was statistically significant (P < 0.05 or P < 0.01). Of the 30 cases of laryngeal carcinoma, the positive expression rate of MTDH, HIF-1α and TKTL1 in the cases with lymphnode metastasis was 84.62%, 84.62% and 79.62%, respectively, compared with the rate in those without lymph nodes metastasis, which was 35.29%, 41.18% and 35.29%. The difference of the positive expression rate of the tested objects between these two groups was statistically significant (P < 0.05). In the tissue of poorly differentiated squamons cell carcinoma verified by pathology, the positive expression rates of MTDH and HIF-1α was 73.68% and 84.21%, respectively, while that in the tissue of well differentiated squamous carcinoma was 27.27% and 18.18%. The difference of the positive expression rate of the tested objects between these two groups was statistically significant (P < 0.05 or (P < 0.01). The positive expression rate of TKTL1 in laryngeal carcinoma at stage I-II was 25.00% and that at stage III-IV was 72.22%, the difference between which was statistically significant (P < 0.05). The positive expression rate of HIF-1α in laryngeal carcinoma at stage I-II was 33.33% and that at stage III-IV was 77. 78%, the difference between which was statistically significant (P < 0.05). The expression of MTDH, HIF-1α and TKTL1 showed no relationship with age,smoking amount or the tumor location (P > 0.05). The Spearman's rank correlation analysis showed that the positive expression rates of MTDH and HIF-1α in laryngeal carcinoma had positive correlation (r = 0.384, P < 0.05); the positive expression rates of TKTL1 and HIF-1α in laryngeal carcinoma had positive correlation (r = 0.508, P < 0.01); But there was no significant correlation between the positive expression rates of MTDH and TKTL1 in laryngeal carcinoma (r = -0.107, P > 0.05). CONCLUSION It suggested that these three proteins may have close relationship with the occurrence, invasion and metastasis of the laryngeal carcinoma. MTDH and TKTL1 may be expected to be new clinical targets for laryngeal carcinoma treatment and it could offer theoretical basis for the prognosis of the laryngeal carcinoma.
Carcinoma, Squamous Cell ; diagnosis ; metabolism ; Cell Adhesion Molecules ; metabolism ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Laryngeal Neoplasms ; diagnosis ; metabolism ; Lymphatic Metastasis ; Neoplasm Staging ; Prognosis ; Transketolase ; metabolism

OBJECTIVE: To explore the expression of phospholipase Cgamma-2 (PLCgamma-2), lipoxygenase-12 (12-LOX) and arachidonic acid (AA) in laryngeal squamous cell carcinoma and to study the the relationship between lipid metabolism and laryngeal squamous cell carcinoma. METHOD: In 30 cases of carcinoma tissue and peritumoral laryngeal mucosa tissues (confirmed to be normal laryngeal tissues by pathology), immunohistochemical method (Streptavidin-peroxidase method, SP method) was used for the detection of expression of PLCgamma-2 and 12-LOX, and gas chromatography/mass spectrometry (GC/MS) for the content of the arachidonic acid in carcinoma tissue and peritumoral normal laryngeal mucosa tissues. RESULT: The positive rates of PLCgamma-2 and 12-LOX in carcinoma tissue were higher than in peritumoral normal laryngeal mucosa tissues with statistically significance differences (P < 0.05). The content of arachidonic acid was lower in carcinoma tissue than in peritumoral normal laryngeal mucosa tissues with statistically significance difference (P < 0.05). The positive expressions of PLCgamma-2 and 12-LOX were closely correlated to tnm stage, histological differentiation and lymph node metastasis (P < 0.05). The content of arachidonic acid had no significant correlations with tnm stage, histological differentiation and lymph node metastasis (P > 0.05). Both the expression of PLCgamma-2 and 12-LOX and the content of arachidonic acid had no statistically significant correlation with age (P > 0.05). CONCLUSION PLCgamma-2, AA and 12-LOX play important roles in laryngeal squamous cell carcinoma. It may be meaningful to the treatment of laryngeal carcinoma by suppressing this passway.
Aged ; Arachidonate 12-Lipoxygenase ; metabolism ; Arachidonic Acid ; metabolism ; Carcinoma, Squamous Cell ; metabolism ; pathology ; Head and Neck Neoplasms ; metabolism ; pathology ; Humans ; Laryngeal Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Neoplasm Staging ; Phospholipase C gamma ; metabolism ; Squamous Cell Carcinoma of Head and Neck

OBJECTIVE: The purpose of this study was to investigate the expression of PKM2 and HIF-1α in laryngeal squamous cell carcinoma and to analyze their correlation in laryngeal squamous cell carcinoma. METHOD: Total 37 laryngeal carcinoma samples and para-carcinoma tissues were taken from the patients who accepted operation treatment in the Second Hospital of HeBei Medical University from 06/2013 to 06/2014. The protein expression levels of PKM2 and HIF-1α were detected with SP immunohistochemical methods. The data were analyzed by the SPSS 13.0 statistical software. RESULT: The positive expression of PKM2 in laryngeal carcinoma tissues and adjacent tissues were 62.16% and 13.15%. The difference was statistically significant (P < 0.01). The positive expression of HIF-1α in laryngeal carcinoma tissues and adjacent tissues were 64.86% and 21.62%. The difference was statistically significant (P < 0.01). The positive expression of PKM2 and HIF-1α in well differentiated laryngeal squamous cell carcinoma were both 47.83%, while in medium and poorly differentiated laryngeal squamous cell carcinoma were 85.71% and 92.86% respectively. The difference was statistically significant (P < 0.05). The positive expression of PKM2 and HIF-1α in patients with lymph metastasis were 90.00% and 100.00% respectively, 51.85% in those without lymph metastasis, the difference was statistically significant (P < 0.05). The rate of HIF-1α positive expression in I-II stage was 53.85%, 90.91% in III-IV stage. The difference between the two groups was statistically significant (P < 0.05). The expression of PKM2 and HIF-1α had no relationship with the age and smoking (P > 0.05). The expression of PKM2 was positively related with HIF-1α in laryngeal squamous cell carcinoma (P < 0.01). CONCLUSION The expression of PKM2 and HIF-1α are related with the proliferation, invasion and metastasis of laryngeal squamous cell carcinoma. It provides a certain theoretical basis for laryngeal cancer diagnosis and screening to measure the expression of PKM2 and HIF-1α as biological indicators.
Biomarkers, Tumor ; metabolism ; Carcinoma, Squamous Cell ; metabolism ; Carrier Proteins ; metabolism ; Head and Neck Neoplasms ; metabolism ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Laryngeal Neoplasms ; metabolism ; Lymphatic Metastasis ; Membrane Proteins ; metabolism ; Squamous Cell Carcinoma of Head and Neck ; Thyroid Hormones ; metabolism

OBJECTIVE: To investigate the role of Keap1-Nrf2-ARE pathway in laryngeal carcinoma occurrence and development. METHOD: Thirty-five laryngeal carcinoma samples and para-carcinoma tissues were taken from the patients who accepted operation treatment in our hospital from Feb 2012 to Sep 2013. The expression levels of Nrf2 and Keap1 were detected in 35 cases of laryngeal carcinoma with SP immunohistochemical methods. The data were analyzed by the SPSS 13.0 statistical software. RESULT: The expression of Nrf2 in the 35 cases of laryngeal carcinoma was 77.14%, which in the para-carcinoma tissues was 8.57%, the difference between these two groups was statistically significant (P < 0.01). The expression of Keap1 in the 35 cases of laryngeal carcinoma was 71.43%, which in the para-carcinoma tissues was 31.43%, the difference between these two groups was statistically significant (P < 0.01). The expression of Nrf2 in I -II stage was 65.00% and in III-IV stage was 93.33%, the difference was significant (P < 0.05). The expression of Keap1 in I-II stage was 55.00% and in III-IV stage was 93.33%, the difference was significant (P < 0.05). Of the 35 cases, the positive expression rate of Nrf2 and Keap1 in laryngeal carcinoma with lymphnode metastasis were both 100.00%, compared with those without lymph nodes metastasis 68.00% and 60.00%, the difference was significant (P < 0.05). The expression of Nrf2 and Keap1 had no relationship with tumor differentiation, smoking and patient age (P > 0.05). CONCLUSION Keap1-Nrf2-ARE pathway may play an important role in progression of laryngeal squamous cell carcinoma.
Biomarkers, Tumor ; metabolism ; Carcinoma, Squamous Cell ; metabolism ; Head and Neck Neoplasms ; metabolism ; Humans ; Intracellular Signaling Peptides and Proteins ; metabolism ; Kelch-Like ECH-Associated Protein 1 ; Laryngeal Neoplasms ; metabolism ; Lymphatic Metastasis ; NF-E2-Related Factor 2 ; metabolism ; Neoplasm Staging ; Squamous Cell Carcinoma of Head and Neck