OBJECTIVE:To discuss problems concerning the current sampling test of drugs in China.METHODS:The rationality of the current drug sampling test method was analyzed empirically according to the theory of sampling test.RESULTS&CONCLUSION:The current drug sampling test method is far from perfect and by which the quality of drugs was unable to be effectively controlled.It is recommended that drug monitoring institutions should work out more scientific sampling test scheme so as to ensure the quality of drugs.

Objective: To investigate the effect of glucocorticoid on high K + induced catecholamine secretion in PC12 cells. Methods: High performance liquid chromatography with electrochemical detection were used to measure catecholamine secreted by PC12 cells. Results:(1) After PC12 cells were pretreated with various concentration of corticosterone at 37℃ for 5 min and then stimulated with various concentration of high K + for different time periods, the inhibitory effect of corticosterone on catecholamine secretion was found in a dose dependent manner. (2) When the duration of high K + treatment was prolonged, the inhibitory effect of corticosterone on catecholamine secretion tended to be attenuated. Conclusion: Glucocorticoid can rapidly inhibit the catecholamine secretion induced by high K + in PC12 cells. [

0.05). Conclusion Treadmill running with low load for 1 week can enhance neurogenesis in the dentate gyrus of young SD rats.

Objective: The main purpose of this research is to confirm that there are at least three subtypes of social withdrawal in childhood: reticence, passive withdrawal and active withdrawal. Each subtype had an individual correlation pattern with children s temperaments. Methods: One hundred and seventy-six Chinese children of about 4 years old participated in a serial of lab observations, during which the three subtypes of social withdrawal were assessed. And the children's mothers completed Colorado Child Temperament Inventory (CCTI) . Results: Reticence positively related to temperamental shyness (r = 0. 21 , P

AIM: To investigate the signal transduction mechanism of rapid effect of corticosterone. METHODS: With liquid scintillation technique, the effect of corticosterone on glycine uptake in C6 cells was examined. RESULTS: The bovine serum album in coupled with corticosterone had the same effect as corticosterone 21-sulfate(B); Neomycin partially blocked the effect of B in C6 cells; GDP-?-S attenuated the effects of B on glycine uptake in C6 cells; Chelerythrine chloride (Chelery) partially blocked the effect of B in C6 cells; H 89 had no influence on the effect of B in C6 cells. The Km and Vmax of effect of B on glycine uptake in C6 cells were different from those in SK-N-SH cells. CONCLUSION: PKC, instead of PKA, was involved in the signal transduction of the rapid effect of B on glycine uptake in C6 cells. The converse effects of B on C6 cells and SK-N-SH cells resulted from different transportation system in two kinds of cells.

Objective To determine whether altered expression of apoptosis pathway genes is related to different apoptosis susceptibility of prostate cancer cells. Methods Androgen sensitive and insensitive prostate cancer cell lines LNCaP and PC 3 were cultured and treated by etoposide,and apoptosis were determined using Hoechst 33258 staining.The cells were harvested and the total RNA was extracted.cDNA probes were prepared and labeled with biotin 16 dUTP,then hybridized to commercially available cDNA arrays including apoptosis pathway specific genes. Results Apoptosis were induced in both PC 3 and LNCaP cells by etoposide,however,PC 3 was more resistant than LNCaP.Compared with LNCaP cells,the 4 fold down regulated genes in PC 3 cells were Bcl10,CIDE A,GADD45a,RIP2,caspase 4,5 and 6,while the 4 fold up regulated gene in PC 3 cells was TRAF4.Caspase 14 and TNFR2 were most strongly expressed genes in the 2 cell lines. Conclusions The altered expressions of apoptosis pathway specific genes are related to the different apoptosis susceptibility,and this may make an important contribution to androgen insensitive state of prostate cancer cells.

OBJECTIVE:To analyse the advantages and disvantages of split tablets given to in-patients.METHODS:We collected13kinds of oral tablets(10tablets each kind and260pieces of the split tablet altogether),which were often splitted by pharmaceutists.We tested and analysed the weight variation of the split tablet on the basis of the dosage consistency metioned in the USP which is applied to the whole tablet.RESULTS:None of the13kinds of prescription drug passed the consistent testing after splitting.There was some relationship between the effect of the split tablet and its shape.It was relatively easy to break off the tablet with nick in half.The loss of dosage inevitably occurred during the process of splitting the tablet.CONCLUSION:Breaking off the tablet in half led to high ratio of weight variation.The modus operandi of splitting the tablet in half for saving expenses can only be applied to those drugs with low toxicities and relatively flat dose-effect curve.In the case of those drugs which bear high toxicities and steep dose-effect curve,carefulness should always be taken when applying such method.

Objective To detect the changes of function of blood-aqueous barrier in different Syndrome stages of patients with Vogt-Koyanagi-Harada (VKH) syndrome in order to provide the appropriate therapy. Methods According to clinical manifestation, 77 patients (144 eyes) with VKH syndrome were divided into 4 groups: 10 cases in posterior uvietis stage group (20 eyes), 27 in anterior uveal involvement stage group (50 eyes), 23 in recurrent anterior uvitis stage group (41 eyes), and 17 in convalescent stage group (33 eyes). The other 50 cases (100 eyes) were in the control group. Flare and cells of anterior chamber in patient with VKH Syndrome at different stages were graded and measured by laser flare and cell meter (LFCM) and slitlamp microscope. Results According to the results of slitlamp biomicroscopy, anterior chamber flare and cells were at the 0 grade in the patients at posterior uvietis stage (20 eyes). The results of LFCM examination revealed that the flare value and cells were (9.7?3.4) pc/ms and (0.9?0.6)/0.5 mm3 in posterior uvietis stage group, and (5.3?2.3) pc/ms and (0.8? 0.6)/0.5 mm3 in the control group. The differences between the two groups were significant (P

AIM　To explore the effect of berberine in inhibition of proliferation and induction of apoptosis of gastric cancer cell MGC-803.METHODS　The MGC-803 cell morphology and cell counting were studied by Trypan blue, MTT, Methyl green pyronin stain assay, the MGC-803 cell DNA changes were investigated by flow cytometry and agarose gel electrophoresis.RESULTS　Berberine could significantly inhibit the growth of MGC-803. After 48 hours of treatment with different concentration berberine (8, 4, 2, 1 mg*L-1), the inhibitive rate of MGC-803 were 86.7%, 65.9%, 20.0%, 0%, respectively. Meanwhile, MGC-803 showed typical apoptosis features: cell shrinkage, nuclear condensation, DNA fragmentation and formation of apoptotic bodies. A typical subdiploid peak before G0/G1 phase was observed by flow cytometry. The Trypan blue stain achromatophilia rates of death cells, which with well membranes, were between 60%～82%. Agarose gel electrophoresis analysis, which showed that the chromosomes of MGC-803 were broken by berberine before the structures of membrane were damaged, while DNA broke into long fragments rather than small fragments, supported that the activation effect of berberine on nuclease was mild.CONCLUSION　Berberine could significantly inhibit proliferation of gastric cancer cell MGC-803 and induced apoptosis, and the cytotoxicity of berberine on MGC-803 was weak.

AIM To explore the effect of berberine in inhibition of proliferation and induction of apoptosis of gastric cancer cell MGC 803.METHODS The MGC 803 cell morphology and cell counting were studied by Trypan blue, MTT, Methyl green pyronin stain assay, the MGC 803 cell DNA changes were investigated by flow cytometry and agarose gel electrophoresis.RESULTS Berberine could significantly inhibit the growth of MGC 803. After 48 hours of treatment with different concentration berberine (8, 4, 2, 1 mg?L -1 ), the inhibitive rate of MGC 803 were 86 7%, 65 9%, 20 0%, 0%, respectively. Meanwhile, MGC 803 showed typical apoptosis features: cell shrinkage, nuclear condensation, DNA fragmentation and formation of apoptotic bodies. A typical subdiploid peak before G 0/G 1 phase was observed by flow cytometry. The Trypan blue stain achromatophilia rates of death cells, which with well membranes, were between 60%～82%. Agarose gel electrophoresis analysis, which showed that the chromosomes of MGC 803 were broken by berberine before the structures of membrane were damaged, while DNA broke into long fragments rather than small fragments, supported that the activation effect of berberine on nuclease was mild.CONCLUSION Berberine could significantly inhibit proliferation of gastric cancer cell MGC 803 and induced apoptosis, and the cytotoxicity of berberine on MGC 803 was weak.