Objective To investigate the effect of ligustrazine on the expression of platelet-derived growth factor-?(PDGF-?) receptor and extracellular signal regulated kinase(ERK1/2) induced by angiotensin Ⅱ(AngⅡ) in cardiac myocytes,and explore the mechanism of therapeutic.Methods Cultured cardiac myocytes of neonatal rats were treated with 10-7 mol/L AngⅡ as Ang Ⅱ group,10-7 mol/L AngⅡ plus 10 mg/L ligustrazine as ligustrazine group,the normally cultured neonatal rat cardiac myocytes as control group.Protein synthesis was measured by -leucine incorporation,and the expression of PDGF-? receptor and ERK1/2 was detected by Western blot.SPSS 11.0 software was used to analyze the data.Results There were significant differences among 3 groups(F=20.71 P

AIM: To evaluate the expression of iNOS mRNA in different invasion ability colon carcinoma cell strains. METHODS: MTT was used to detect the growth and reproduction of colon cancer cell strain CW-2 and LS174T. RT-PCR and Northern blot were used to detect expression of iNOS mRNA in colon cancer. RESULTS: MTT growth curve displayed that colon cancer cell strain LS174T grew and reproduced faster than cell strain CW-2. RT-PCR showed that iNOS mRNA expressed strongly in CW-2 cell strain, while iNOS mRNA expressed weakly in LS174T cell strain. Northern blot detected that iNOS mRNA expressed obviously in CW-2 cell strain, but cell strain LS174T have no obvious iNOS mRNA expression. All-trans retinoic acid (ATRA) had no obvious effect on iNOS mRNA expression in CW-2 cell strain of colon cancer. CONCLUSIONS: ATRA has no obvious effect on iNOS mRNA expression. iNOS has a dual effect on tumor growth. In low-metastatic colon carcinoma CW-2, iNOS may exert a anti-tumor influence by cytotoxicity or inducing cell apoptosis. In high-metastatic colon cancer LS174T, iNOS produced low concentration of NO, which may be an important signal-transduction molecule for increasing blood supply and angiogenesis, which improve the growth, invasion and metastasis of tumor.

OBJECTIVE:To optimize the extraction technology of Paeonia lactiflora. METHODS:The surface figure made by mixed uniform design combined with the quadratic polynomial stepwise regression equation is adopted to optimize the extraction technology of P. lactiflora by using the content of paeoniflorin as index,with extraction solvent,the amount of extraction solvent, extraction time,extraction times as factors. RESULTS:The optimal extraction technology of P. lactiflora was as follows as 90%ethanol,12-folds extraction solvent,extracting for 150 min,extracting for 2 times. The measured value of 3 validation tests were 2.848 4%,2.795 7%,2.841 9%(RSD=0.82%,n=3),which was close to the predicted value 2.848 4%. CONCLUSIONS:The method is convenient and accurate,and can be used for the extraction of P. lactiflora.

OBJECTIVETo study the effects of repeated + Gz forces on masticatory muscles.

METHODS48 male Wistar rats were randomly divided into 4 groups. Group A was normally fed. Group B was only fixed with rat-kept devices for 5 minutes. Group C was borne + 1 Gz for 5 minutes. Group D was repeatedly exposed + 10 Gz (each for 30 s, onset rate about 0.5 G/s, 5 times/d with + 1 Gz 1 minute intervals, 4 d/wk, 3 weeks in total). The histological changes of the masseter, temporal and lateral pterygoid muscles were observed.

RESULTSNo abnormal changes were observed in Group A, B and C. But pathological changes could be found in group D. The wrench and deformation of muscular fibers, the dissolution of partial myofibril, the swelling of mitochondria, the reduce of hepatin from the masseter and lateral pterygoid muscles could be found.

CONCLUSIONSRepeated + Gz stresses could induce the damage of masticatory muscles in different degrees.

Animals ; Hypergravity ; Male ; Masseter Muscle ; pathology ; ultrastructure ; Masticatory Muscles ; pathology ; ultrastructure ; Microscopy, Electron ; Pterygoid Muscles ; pathology ; ultrastructure ; Rats ; Rats, Wistar ; Temporal Muscle ; pathology ; ultrastructure ; Time Factors

Objective To explore effects of parents exposure to TBT on blood routine of F1 generation mice. Methods 80 mice including 40 males and 40 females, were randomly divided into control groups (CK) , low dose groups (LTBT), middle dose groups (MTBT) and high dose groups (HTBT).They were given dose of TBT (0,0.2,2, 20μg/kg) every day.The experiment lasted 45 days.At 60 days, one female and one male of the same concentration were bred in the same cage according to 1∶1.At postnatal day 60, blood was collected for the determination of blood routine. Results Compared with control group, the number of red blood cells and hemoglobin of F1 generation male mice in LTBT and HTBT groups were significantly increased (P <0.01); Red blood cell volume, mean corpuscular hemoglobin (P <0.01), and the lymphocyte absolute value in F1 generation male LTBT were significantly reduced (P <0.05); HTBT of female mice were significantly increased about the number of red blood cells (P <0.01).A dose-dependent increase of the hemoglobin, red blood cells, and platelet count of F1 generation female experimental groups was observed.Conclusion Parental TBT exposure affects the F1 mice blood routine.There is the greatest influence on LTBT in F1 generation male mice and on HTBT in F1 generation female mice.

Objective To observe the changes of respiratory and hemodynamic functions in children with different age undergoing laparoscopic Nissen's fundoplication(LNF). Methods Thirty-three children with LNF were divided into three groups according to the age: group Ⅰ,1 to 12 months,n=13;group Ⅱ,1 to 3 years old,n=10;and group Ⅲ,4 to 7 years,n=10.Heart rate(HR),mean arterial pressure,Ppeak,compliance of the respiratory system(CRS) and end-tidal carbon dioxide pressure(PETCO2) were recorded 5 min before pneumoperitoneum(T0),10 min(T1),60 min(T2) after pneumoperitoneum and 10 min after deflation(T3),and parameters of blood gas analysis such as PaCO2 were measured at the same time. Results Compared with those at T0,HR,Ppeak,PETCO2 and the difference between PaCO2 and PETCO2(Pa-ETCO2)were significantly increased at T1 and T2,while CRS was significantly decreased.The most significant changes were found in group Ⅰ. Conclusion The changes of respiratory and hemodynamic functions are observed in children undergoing LNF,and anesthesia management should be enhanced for those within 1 to 12 months old who experience the most significant changes.

OBJECTIVETo explore the effects of paeoniflorin on blood brain barrier and pathological changes in brain ischemia.

METHODMice were divided into sham operation group, model group, positive control group-Deng zhanhua tablet group and three different dose (high, middle, low-dose) groups of paeoniflorin. The neurological symptoms of rats were observed. The SOD of ischemic brain tissue, MDA BBB and EAA contents were determined. The ultrastructure on the brain cells was inspected by transmission electron microscope.

RESULTPaeoniflorin had the protetive effects on 4VO model of total cerebral ischemia. Paeoniflorin could obviously increase SOD content, reduce MDA content in rat brain-tissue and alleviate oxidative stress damage by cerebral ischemia on rat brain. Paeoniflorin could improve pathological changes of cell nuclear, perikaryon, mitochondria and myelin sheath, which was the morphologic basis of the protective effect on ischemia. Paeoniflorin could alleviate the incrense of EAA content caused by and hypoxia and inhibit the excitatory neural toxicity by EAA.

CONCLUSIONPaeoniflorin has the protection effect on the brain edema after cerebral ischemia, the oxidative stress damage on brain tissue, the ultrastructure lesions of cells and the BBB. The protective mechanism may be related to inhibiting intracellular calcium overload, anti-free radical and reducing EAA content.

Animals ; Behavior, Animal ; drug effects ; Benzoates ; isolation & purification ; pharmacology ; Blood-Brain Barrier ; drug effects ; pathology ; ultrastructure ; Brain ; blood supply ; drug effects ; metabolism ; Brain Ischemia ; pathology ; physiopathology ; prevention & control ; Bridged-Ring Compounds ; isolation & purification ; pharmacology ; Glucosides ; isolation & purification ; pharmacology ; Male ; Malondialdehyde ; metabolism ; Microscopy, Electron ; Monoterpenes ; Neuroprotective Agents ; isolation & purification ; pharmacology ; Paeonia ; chemistry ; Plants, Medicinal ; chemistry ; Random Allocation ; Rats ; Rats, Wistar ; Superoxide Dismutase ; metabolism

ObjectiveBy analyzing the epidemiological characteristics and trends of brucellosis in Hebei province,provide a scientific basis for the formulation of strategies for effective prevention and control of the disease.MethodsUsing the descriptive epidemiological method,data of the “China information system for disease control and prevention” from 2006 to 2010 were statistically analyzed.ResultsThere were 13 632 reported cases from 2006 to 2010 in Hebei province,no death,the annual incidence rates reported were 3.4068/10 million,3.4851/10 million,4.5701/10 million,4.6045/10 million,and 3.5582/10 million,respectively.Eleven counties throughout the province had reported cases.The cases were found intensively in Zhangjiakou,Chengde,Baoding,Handan and Shijiazhuang,which accounting for 90.02％ (12 271/13 632) of the total cases.The disease was found each month throughout the year,and showed a seasonal cycle with peak period in spring and summer.The disease was most commonly found in 25 - 65 age people,which accounting for 84.57％(11 529/13 632).The incidence in male was higher than that of female,and male to female ratio was about 3.56:1.00.Vocational high risk population was farmers,accounting for 91.15％ of the total cases(12 425/13 632).ConclusionsBrucellosis epidemic in Hebei province is relatively serious,and the epidemic range has expand each year,even highly active in some particular areas.To control the outbreak of brucellosis,departments cooperation between health and animal husbandry should be strengthened; management of source of infection should be strengthened; health education and behavior intervention should be carried out thoroughly and deeply for high-risk groups.

Objective To assess the clinical values of MR angiography(MRA)in the detection of deep vein thrombosis of the lower limbs.Methods Two-dimensional time of flight(2D TOF)MRA was performed in thirty patients who were suspected of having deep vein thrombosis in the lower limbs.The findings of MRA were compared to that of digital subtraction angiography(DSA).Results twenty-five cases showed deep vein thrombosis in the lower limbs,the MRA findings included venous filling defect (14 cases),occlusions and interruptions of veins(8 cases),venous recanalizations(3 cases),collateral veins(25 cases).Taking the results of DSA as a golden standard,MRA detected all of the affected cases with only one case as the false positive.Conclusion 2D TOF MRA is a method of choice in the diagnosis of deep vein thrombosis of the lower limbs.

China ; Heart Transplantation ; methods ; Humans