AIM The preventive effects of safflor yefflor (SY) on myocardium injury of myocardium ischemic reperfusion (I/R) was studied. METHODS The contents of MDA activity of SOD,as well as the activity of creatine phospho kinase(CK) and lactate dehydrogenase(LDH) were determined in rat models injured by I/R. RESULTS SY could reduce the activities of CK and LDH ,decrease the the content of MDA in plasmo, and increase the activities of SOD. CONCLUSION SY may obviously prevent the rat I/R model which may be related to its anti lipoperoxidation.

Aim To observe the effects and mechanism of safflor yellow on the experimental acute myocardial ischemia (AMI) model rats. Methods AMI model rats were induced by isoproterenol (10 mg?kg-1). The changes of indexes on hemodynamics such as MBP, LVSP, LVEDP and ?dp/dt_ max,the coronary artery flux(CF) and myocardia O_2 comption(MVO_2) in AMI model rats were observed respectively. Results The CF and MVO_2 in the heart muscle increased and decreased respectively the indexes of hemodynamics were improved in safflor yellow groups. Conclusion The results indicate that safflor yellow can inhibit the failure of heart function induced by AMI, increase the coronary artery flux and decrease MVO_2 significantly.

Heparinase II (Hep II) from Flavobacterium heparinum is an enzyme that could specifically cleave certain sequence of heparin and heparan sulfate. In this work, fermentation conditions of recombinant heparinase II (His-Hep II) producing bacteria were optimized, including initial induction time, inducer (IPTG) concentration, induction temperature and induction time. The optimum conditions were as follows: cultivating recombinant bacteria to exponential prophase under 37 degrees C, then adding IPTG to a final concentration of 0.3 g/L, finally cultivating recombinant bacteria under 20 degrees C for 10 h. The total crude enzyme activity reached 570 U/L. Based on these results, high cell density fermentation of recombinant bacteria was studied. The final OD600 could reach 98 and the total crude enzyme activity of His-Hep II increased to 9 436 U/L.
Fermentation ; Flavobacterium ; metabolism ; Microbiological Techniques ; Polysaccharide-Lyases ; biosynthesis ; Recombinant Proteins ; biosynthesis

ObjectiveTo evaluate the clinical value of infrahyoid myocutaneous flap in the reconstruction of mouth floor tissue defects. MethodsInfrahyoid myocutaneous flap was made including stenohyoid,thyrohyoid,omohyoid and the affiliated skin based on the axis of superior thyroid artery,vein and ansa cervicalis. The clinical data of 11 patients with reconstruction of mouth floor tissue defects using infrahyoid myocutaneous flap (maximum area was 8 cm × 3 cm) from Match 1993 to June 2009 were retrospectively reviewed.ResultsSeven infrahyoid myocutaneous flaps which reserved platysma branch of superior thyroid artery were all alive, while 2 patients presented epidermal necrosis of 4 un-protected patients. The follow-up period was range from 24 months to 195 months, one patient received salvage surgery for local regional lymphatic recurrence in level Ⅰ,which survived without diseases until now.The rest cases had turned out a success.No dysphagia,dysphonia,and tongue extension difficulty was reported in any patient.ConclusionInfrahyoid myocutaneous flap is one of the valuable donor sites for the reconstruction of mouth floor tissue defects after radical oncologic operations,especially for those with early stage carcinoma of the mouth floor.

Objective To evaluate the clinical characters, management and prognostic factors of patients with differentiated invasive thyroid carcinoma (DITC). Methods The data were analyzed retrospectively for 114 DITC patients treated at Department of Head and Neck Surgery of Sun Yat-sen University Cancer Center. Survival analysis was performed by Kaplan-Meier method, comparison among/between groups was performed using log-rank test, and multivariate analysis was carried out using Cox proportional hazard model. Results After surgery, 68 patients were with tumor residue. The 5-year and 10-year overall survival rate were 91.9% and 80.1% respectively in all patients, while the 10-year overall survival rate were 88.5% 、78.5% and 53.1% in no tumor residue group, micro-residue group and grossresidue group respectively. This study failed to prove that radiotherapy might improve the survival rate in patients with postoperative tumor residue. Multivariate analysis indicated that age, invasion to esophagus and recurrence predict the prognosis. Conclusion DITC may be treated mainly by surgical operation. Radical resection is the key factor in the treatment of DITC. Patients with DITC have a relatively poor prognosis.Age, esophagus invasion and status of tumor residue are the most important factors affecting the prognosis.

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Objective To study the influence of excisional biopsy on detection rate of sentinel lymph node biopsy through methylene blue in breast cancer.Methods A review of 76 patients with clinical stage T1-2N0M0 breast cancer who had a successful sentinel lymph node biopsy at the Affiliated Nanhai Hospital of Southern Medical University between July 2009 to July 2014 was analyzed.There were 37 patients received sentinel lymph node biopsy directly.And 39 patients received sentinel lymph node biopsy after a excisional biopsy to primary lesion.We compare the difference of detection rate of sentinel lymph node between the two groups.Results Seventy cases had been found sentinel lymph node successfully in a total of 76 patients and the detection rate is 92.1％.There were 34 cases had sentinel lymph node biopsy in successfully in group of excisional biopsy and the detection rate is 87.2％.There were 36 cases had sentinel lymph node biopsy in successfully in group of needle core biopsy and the detection rate is 97.3％.This difference,however,was not statistically significant between the two groups (P ＞ 0.05).Conclusions The influence of excisional biopsy on detection rate of sentinel lymph node biopsy through methylene blue in breast cancer is not significant.

Objective To investigate the efficacy and tolerability of dose-dense chemotherapy with cisplatin plus 5-fluorouracil( PF regimen)in distant metastatic nasopharyngeal carcinoma( NPC)patients. Methods From April 1,2008 to April 30,2014,168 patients were assigned to traditional group(n = 83) and dose-dense group(n = 85)using digital random table in 1 : 1 ratio. All patients received PF regimen,and once every 28 days in traditional group and once every 14 days in dose-dense group. The primary endpoint was progression-free survival(PFS)and the secondary endpoint was overall survival(OS),toxicity and response rate. Results The median PFS,median OS,1,2,3-year survival rate,complete response rate and objective response rate were significantly improved in dose-dense group which were 13. 3 months,20. 2 months,80. 2% , 36. 0% ,16. 1% ,16. 5% ,84. 7% ,and those in control group were 10. 0 months,16. 1 months,59. 6% , 10. 1% ,0,3. 6% ,54. 2% respectively(χ2 = 24. 47,P = 0. 000;χ2 = 16. 65,P = 0. 000;χ2 = 8. 41,P =0. 004;χ2 = 16. 96,P = 0. 000;χ2 = 14. 91,P = 0. 000;χ2 = 7. 63,P = 0. 006;χ2 = 18. 47,P = 0. 000). The rates of grade 3-4 adverse events in dose-dense and traditional group were 38. 8% and 6. 0%(χ2 = 25. 81, P = 0. 000). Conclusion Dose-dense chemotherapy of PF is more efficient and acceptable toxic than the tra-ditional one. It can be a new treatment option for patients with distant metastases of NPC.

To establish an HPLC mehod for the analysis of pharmacokinetics of salvianolic acid B in rats. METHODS: The biological samples were extracted with acetic ether. The chromatographic conditions were as follows: Hypersil ODS column (200 mm×4.6 mm, 5μm) was used. The mobile phase was acetonitrile-water(with Ammoniom Acetate 0.25 mol/L) was set at 328 nm. RESULTS: Salvianolic acid B was injected intravenously at doses of 1.6, 3.2, 6.4 mg/kg. The terminal elimination half-life(t1/2) of α phase and β phase was (3.1±0.1) min and (31.5±3.2) min. The extents of excrement,urine and biliary excretion of salvianolic acid B were 1.43%±0.90%, 0.77%±1.01% and 8.82%±4.11%. The tissue concentration of salvianolic acid B was as followed in order: Cheart>Cliver>Clung>Cintestine>Ckidney>Cspleen>Cstomach. The plasma protein binding rate of salvianolic acid B in human plasma and in rat was similar(89.2%±1.8%,92.5%±1.5%). CONCLUSION: The method is accurate, stable and reliable, and can be used for the investigation of salvianolic acid B in pharmacokinetics research. Salvianolic acid B eliminates fast and it shows a high plasma protein binding rate, the mainly excretion way of salvianolic acid B is from biliary.