Objective To evaluate the biological safety of a Ni-62.9Cr-23 alloy fabricated by laser solid forming technology.Methods According to the requirements of national standards GB/T16886-2003,YY/T0279-1995 and YY/T0244-1996,general cytotoxicity,acute systemic toxicity,hemolysis testing,oral mucous membrane irritation testing were used to evaluate the alloy.Results The alloy was indicated having no cytotoxicity and with a hemolytic rate of 0.385%.The oral mucous membrane irritation testing showed that the alloy had no mucous membrane irritation.The acute systemic toxicity test indicated that the alloy had no acute systemic toxicity.Conclusion The Ni-62.9Cr-23 alloy has good biological safety in a certain extent.

BACKGROUND:The use of neural stem cels provides a new approach for nervous system functional reconstruction and nerve regeneration. How to solve the induced differentiation of neural stem cels is stil a research hotspot.
OBJECTIVE:To investigate the differentiation of rat neural stem cels into neurons and dopaminergic neurons under induction of glial cel-line derived neurotrophic factor gene.
METHODS:PcDNA3-GDNF-GFP plasmids were constructed and transferredvia lipidosome into rat embryonic neural stem cels. Differentiation of neural stem cels after transfection was identified under a fluorescence microscope. Immunofluorescent staining was used to detect expression of β-tubulin III and tyrosine hydroxylase.
RESULTS AND CONCLUSION:At 3 days after transfection, green fluorescence was observed in the transfected cels that were globular. At 7 days after transfection, the proportion of neural stem cels differentiating into neurons and dopaminergic neurons were significantly increased. These results indicate that the glial cel-line derived neurotrophic factor gene can induce the differentiation of neural stem cels into neurons and dopaminergic neurons.

Objective To compare the effect of enteral nutrition by jejunum colostomy nutrition infusion pump of patients after Whipple surgery as well as reduce adverse reactions in patients.Methods Sixty-five cases with the implementation of Whipple and jejunum of colostomy were selected as our subjects,who were hospitalized in the Affiliated hospital of Hebei United University from Feb.2009 to Nov.2013.All patients were divided into observation group (33 cases) and control group (32 cases) according to the methods of nutrient input.Patients in observation group were given nutrition infusion pump pumping (15 to 50 ml/h) ;and patients in control group were adopted disposable infusion connection infusion with the speed of 30 drops/min with the thermostat heating temperature and the water pipe.The blood glucose,serum albumin,blood electrolyte concentration of postoperative,and the adverse reactions during input nutrient solution including vomiting,abdominal distention,diarrhea and other adverse circumstance were recorded.Results At 1st,3rd,5th day,there was no statistically significant difference in terms of the levels of glucose,blood albumin,blood C1,Na +,K + between two groups(blood glucose:F inner grouP =3.01,P ＞ 0.05 ; F between group =2.90,P ＞ 0.05 ; F cross group =2.87,P ＞ 0.05 ; serum albumin:F inner group =2.94,P ＞ 0.05 ; F between group =2.89,P ＞ 0.05 ; F cross group =2.76,P ＞ 0.05 ; blood Cl:F inner group =1.78,P ＞ 0.05 ; F between group =1.96,P ＞ 0.05 ; F cross group =1.88,P ＞ 0.05 ; blood Na +:F inner group =1.06,P ＞ 0.05 ; F between group =1.35,P ＞ 0.05 ; F cross group =1.27,P ＞ 0.05 ; blood K +:F inner group =3.12,P ＞ 0.05 ; F between group =3.04,P ＞ 0.05 ; F cross group =2.93,P ＞ 0.05).There were significant differences regarding of the rate of vomiting,abdominal distention,diarrhea and other adverse conditions compared with the infusion enteral nutrition has good clinical effect,postoperative blood (x2 =4.029,4.381,4.905 respectively; P ＜ 0.05).Conclusion The methods of colostomy enteral nutrition with infusion pump after Whipple surgery is proved to be with the better clinical effect in reducing postoperative vomiting,abdominal distention,diarrhea and other adverse conditions compared with the infusion enteral nutrition,and there are no significant difference in the terms of the levels of glucose,blood albumin,blood Cl,Na +,K +.

Objective To study the clinical features bone marrow biopsy of secondary myelofibrosis(SMF).Methods 69 patients with secondary myelofibrosis were analyzed retrospectively,and the relationship between myelofibrosis degree and megakaryocyte count was analyzed. Results Analysis of 69 cases of patients with SMF, the original incidence included 20 cases (29.0 ％)of chronic myeloid leukemia (CML),14 (20.3 ％) cases of lymphoma,10 (14.5 ％) cases of acute myeloid leukemia (AML),10 (14.5 ％) cases of myelodysplastic syndrome (MDS),6 cases(8.7 ％)of acute lymphoblastic leukemia (ALL),4 cases of multiple myeloma (MM),3 cases of myeloproliferative neoplasms (MPN),2 cases of chronic lymphocytic leukemia (CLL).There was no significant difference of the mygakaryocytes’ count and association of myelofibrosis with it was found (r=0.024,P=0.848). Conclusion Various clinical diseases of blood system may associated with secondary myelofibrosis. Bone marrow biopsy can be used to initial diagnostics of malignant disease of hematological system patients.When cellular examination of bone marrow is dry tap or dilution, which means higher incidence of SMF. Bone marrow biopsy plays an important role in diagnosis of SMF.

AIM:This paper described a HPLC method.Paeoniflorin and puerarin in Rg soft-exact(Radix Puerariae lobatae,Redix Paeoniae alba,etc.) were simultaneously determined.METHODS:A simplified HPLC procedure was developed.A 4.6 mm?250 mm Alltima C_(18) column with a mobile phase consisting of NaH_2PO_4(20 Mm,pH 2.4)-Acetonitrile:Tetrahydrofuran(900:120:5) was used.The flow rate was 1.00 mL/min.It was detected at 320 nm.RESULTS:Paeoniflorin and puerarin were well separated.The average recoveries of paeoniflorin and puerarin were 98.10% and 101.2% respectively.CONCLUSION:The result shows that this method is convenient,rapid and accurate.

In clinical work, many chronic prostatitis whose main clinical manifestations of sexual neurasthenia are misdiagnosed due to lack of typical lower urinary tract symptoms and pelvic floor pain. Therefore, attention is paid to prostate digital rectal examination and routine examination of prostatic fluid, and neuromodulators or psychotropic medicine should not be applied in the performance of sexual neurasthenia alone. Instead, integrated traditional Chinese and Western medicine treatment measures should be actively adopted to achieve satisfactory clinical results.

Objective To assess left ventricular(LV) longitudinal strain in patients with coronary heart disease by two-dimensional speckle tracking imaging (2DSTI),and to explore the clinical value of 2D longitudinal strain in detecting myocardial ischemia. Methods Forty-four patients with coronary heart disease (CHD group) and 28 age-matched subjects (control group) were enrolled into this study. The two-dimensional data were obtained in apical 4-chamble, 2-chamber and long axis view. And the longitudinal strains of every segments, the average longitudinal strain of LV 18 segments (SL18), the average longitudinal strain of 12 segments (SL12,excluded the 6 apical segments) were analyzed. Results In the patients with CHD, the longitudinal strain of ischemia segments and the global LV longitudinal strain were significantly decreased than that of the control subjects. Both in patients with CHD and in control subjects,the longitudinal strains in apical segments were higher than that of middle and basal segments. There was significant difference between SL18 and SL12 ( P=0.027 in CHD group and P =0.003 in control group).Receiver operating curve (ROC) analysis demonstrated that the cutoff point of SL18 to detect myocardial ischemia was - 18.8％ (sensitivity 80.2％ and specificity 74.1％ ) ,and the cutoff point of SL12 to detect myocardial ischemia was - 17.8％ ( sensitivity 81.7％ and specificity 85.6％ ). Conclusions 2D longitudinal strain was sensitive to detect myocardial ischemia, SL12 was better than SL18 in detecting myocardial ischemia. 2DSTI might be useful for identifying patients with severe CHD.

Objective To assess the left ventricular function of patients with acute myocardial infarction (AMI) and its correlation with cardiac troponin T (cTnT) and specific manifestation of electrocardiogram (ECG) by automated function imaging (AFI) of two-dimensional speckle tracking imaging.Methods Forty-six AMI patients who had AMI for the first time and had been treated by primary percutaneous coronary intervention and 30 healthy controls who were age and sex-related to infarct group were involved.The values of cTnT within 24 hours after admission of AMI patients were recorded and the values of ST segment elevation were measured accurately.All the subjects were analyzed for longitudinal peak systolic strain (LPSS) values and the bull' s eyes by AFI.Results Compared to control group, left ventricular ejection fraction (LVEF), global and infarcted LPSS of infarct group were significantly different and the values of ST elevation of infarct group were higher than those of control group.Both global,infarcted segmental LPSS were significant closely correlated to LVEF and cTnT,respectively (P＜0.001,all).Both global, infarcted segmental LPSS were correlated to ST elevation (P ＜0.05,all).Global LPSS had the closest correlation with LVEF (r = -0.565, P＜0.001) and so did infarcted LPSS with cTnT (r = 0.432, P ＜0.01).Conclusions As a procedural simple and rapid diagnostic tool,AFI provides reliable and useful information of the assessment of AMI.Both global and infarcted segmental LPSS have well described left ventricular function of AMI patients.Compared to LVEF, LPSS was more closely correlated to cTnT and ST segment elevation, which meant that LPSS was more sensitive and more closely related to real infarct size and actual involved range of AMI.

Objective To assess the correlation between time during admission to percutaneous coronary intervention (PCI) and left ventricular function recovery of acute myocardial infarction (AMI) by two-dimensional speckle tracking imaging (STI).The clinical value of STI in assessing therapeutic effect of AMI treated by PCI and estimation of the prognosis were discussed.Methods Sixty-one AMI patients who had AMI for the first time and had been treated by primary PCI were enrolled.Dynamic images were acquired before PCI,at 7 days after PCI and 30 days after PCI and analyzed by STI.The time during admission to PCI of AMI patients was recorded accurately.Dynamic images were analyzed for longitudinal peak systolic strain (LPSS) values (global,infarcted area) by STI.According to the comparison of left ventricular ejection fraction(LVEF) before PCI and 30 days after PCI,patients were divided into left ventricular function improved group (ΔLVEF≥5 ％) and not-improved group,and the values of LPSS and time during admission to PCI were compared between the two group respectively.Results Compared to not-improved group,the time during admission to PCI in improved group was lower ( P ＜0.001),infarcted segmental LPSS at 7 days after PCI ( P ＜0.05) and both global ( P ＜0.001) and infarcted segmental LPSS ( P ＜0.001) at 30 days after PCI in improved group were higher than those in not-improved group.Linear regression analysis showed that both global and infarcted segmental LPSS were significant correlated to LVEF respectively ( P ＜0.001,all).Infarcted segmental LPSS at 7 days after PCI were correlated to the time during admission to PCI ( P ＜0.05).LVEF ( r =0.303,P ＜0.05),global ( r =0.300,P ＜0.05)and infarcted segmental LPSS ( r =0.590,P ＜0.001) at 30 days after PCI were correlated to the time during admission to PCI.Conclusions STI provides reliable and useful clinical information for the assessment of therapeutic effect of AMI treated by PCI and estimation of the prognosis by sensitively presenting the close correlation between time during admission to PCI and left ventricular function recovery of AMI patients.

OBJECTIVETo investigate the dosage-efficacy/toxicity relationship of prepared rhubarb, in order to explore the bidirectional effects in hepatoprotection and hepatotoxicity of prepared rhubarb and the objective authenticity for attenuating toxicity by processing.

METHODNormal and pathological animals were adopted simultaneous to investigate the effect of total extracts from prepared rhubarb within a high dose range (2.0, 5.4, 14.7, 40.0 g x kg(-1) x d(-1)) on normal state, biochemical index and histopathology of experimental animals. The factor analytic approach was used to analyze the dosage-efficacy/toxicity relationship of prepared rhubarb.

RESULTThe factor analytic approach was used to extract two common factors from the nine biochemical indexes. The firs common factor was mainly dominated by HA, LN and TGF-β1, and could be explained as fibrotic factors. The second common factor was mainly dominated by ALT, AST and ALP, and could be explained as cellular factor. The results of the factor analysis suggested that prepared rhubarb showed significant bidirectional effects in hepatoprotection and hepatotoxicity, which could protect liver in CC14 injured chronic hepatic injury, but had a certain hepatotoxic effect to normal animals. The pathological examination showed consistent results with the factor analysis. Under comparable dosages, prepared rhubarb showed a stronger liver protecting effect than crude rhubarb, with a lower toxicity.

CONCLUSIONAlthough prepared rhubarb has a certain hepatotoxic effect to normal animals, it has also a significant therapeutic effect to animals with liver injury. The results proved the symptom-based prescription theory and the scientificity of the symptom-based medication. The symptom-based prescription theory is important to correctly realize the dosage-efficacy/toxicity relationship of traditional Chinese medicines and guide the symptom-based medication.

Animals ; Dose-Response Relationship, Drug ; Drug Prescriptions ; Drugs, Chinese Herbal ; pharmacology ; toxicity ; Female ; Fibrosis ; Liver ; drug effects ; metabolism ; pathology ; Male ; Rats ; Rats, Sprague-Dawley ; Rheum ; chemistry ; Toxicity Tests