An HPLC method for the determination of geniposide concentration in mouse plasma was developed and the pharmacokinetics after intranasal administration of Xingnaojing microemulsion (XNJ-M) and mPEG2000-PLA modified Xingnaojing microemulsion (XNJ-MM) were investigated. Eighty mice were treated by XNJ-M and XNJ-MM nasally. The plasma samples were collected at different times and the drug in samples was detected by HPLC. The pharmacokinetic parameters were calculated by the software of Kinetica. The pharmacokinetic parameters of geniposide of XNJ-M were C(max) (4.36 +/- 2.69) mg x L(-1), t(max) 1 min, MRT (29.73 +/- 4.54) min, AUC (53.63 +/- 14.03) mg x L(-1) x min. The pharmacokinetic parameters of geniposide of XNJ-MM were C(max) (9.75 +/- 4.14) mg x L(-1), t(max) 1 min, MRT(22.34 +/- 2.90) min, AUC (131.87 +/- 40.13) mg x L(-1) x min. Geniposide can be absorbed into blood in a higher degree after intranasal administration with XNJ-MM compared to XNJ-M, which maybe caused by its less irritating and more absorption.
Animals ; Drugs, Chinese Herbal ; administration & dosage ; chemistry ; Emulsions ; Iridoids ; blood ; pharmacokinetics ; Lactic Acid ; chemistry ; Male ; Mice ; Polyesters ; Polyethylene Glycols ; chemistry ; Polymers ; chemistry

BackgroundDry eye is a multi-factorial-induced tear film and ocular surface disorder.Immunoinflammation plays a key role in the pathogenesis of dry eye.As inhibitor of the cyclo-oxygenase pathway,nonsteroidal anti-inflammatory drugs play an anti-inflammatory and anti-hypersensitivity role,and it can be a potential treatment for dry eyes.ObjectiveThis study was to investigate the effectiveness of nonsteroidal anti-inflammatory drugs (0.1％topical pranoprofen) on moderate to severe dry eyes and its mechanism.MethodsThis was a small sample of randomized controlled clinical trial.Thirty right eyes of 30 patients with moderate to severe dry eyes were included in the study according to the diagnosis criteria and randomized into two groups.The patients of the trial group received topical administration of 0.1％ pranoprofen plus 0.1％ sodium hyaluronate,and those of the control group received the topical 0.1％ sodium hyaluronate only.Ocular surface inflammation index scores (OSDI) and ocular surface fluorescine staining (OSS) scores were measured under the slit lamp,and tear film break-up time (BUT),Schirmer Ⅰ test values were evaluated.The expression of human leucocyte antigen-DR (HLA-DR) and CD11b in conjunctiva epithelial cells were detected by impression cytology and flow cytometry (FCM).All the indexes were compared between the two groups before and after treatment.Informed consent was obtained from all patients.ResultsThere were no significant differences in terms of age and gender and their baseline values between the trial group and control group (t=0.412,P=0.684;x2=0.240,P=0.624),and so were all the indexes (P＞0.05).Compared with the control group,the OSDI,OSS scores and cells positive for HLA-DR were lowered but the BUT was delayed in the trial group on day 15 ( t=2.43,P=0.03;t=2.83,P=0.01;t=3.29,P=0.00;t=3.23,P=0.00 ).No significant differences were found in the Schirmer Ⅰ test value and CD11b expression between these two groups (t=0.17,P=0.87;t=0.28,P=0.79).The OSDI,OSS scores and BUT were significantly improved,and the number of cells positive for HLA-DR were reduced 15 days after administration of drugs in comparison with before treatment in the trial group ( t =12.30,10.70,6.10,7.92,P =0.00 ).However,there were no comparable alteration seen in these indexes before and after the usage of drugs in the control group ( P＞0.05).Positive correlations were found in HLADR expression with OSDI and OSS ( r =0.601,P =0.018 ; r =0.586,P =0.022 ) and a negative correlation in HLADR expression with BUT (r=-0.697,P=0.004) on day 15 in the trial group.ConclusionsTopical usage of 0.1％ pranoprofen is beneficial for remitting the ocular signs and symptoms in moderate to severe dry eyes.This study illustrates that topical usage of 0.1％ pranoprofen can down-regulate the expression of inflammatory markers in conjunctival epithelial cells.

A quick HPLC-ESI-MS/MS method was established for simultaneous determination of three chemical compositions in Usnea, including usnic acid, diffractaic acid, and ramalic acid. The separation was performed on a chromatographic column of Agilent ZORBAX SB-C, (4.6 mm x 250 mm, 5 µm), and the mobile phase was methanol (0.05% formic acid)-0.05% formic acid solution (4 mmol ammonium acetate), with an isocratic elution at a flow rate of 0.8 ml · min⁻¹. Multiple reaction monitoring scanning mode (MRM) was performed combined with the ion switching technology in positive and negative ion switching mode to apply for the quantitative determination. The calibration curves for the above three compounds were linear in corresponding injection amount. Their average recoveries were 95.0%-105.1%, with RSDs of 1.1%-5.2%. The method was simple, rapid, accurate with high repeatability, which could provide a reference for overcalling evaluation the quality of Usnea.
Chromatography, High Pressure Liquid ; methods ; Hydroxybenzoates ; analysis ; Spectrometry, Mass, Electrospray Ionization ; methods ; Tandem Mass Spectrometry ; methods ; Usnea ; chemistry

OBJECTIVETo further study the mechanism of the inhibitory effect of interferon beta-1a (IFN beta-1a) on the activation of human hepatic stellate cell (HSC) LX-2, and to analyze the differences on the protein expression in LX-2 induced by I IFN beta-1a.

METHODSCultured LX-2 cells were treated with 2000 U/ml IFN beta-1a for 48 h. Two-dimensional gel electrophoresis (2-DE) was performed to compare protein patterns of the control (untreated) and IFN beta-1a treated LX-2 and for quantitative and qualitative analyses of protein expression. A rat liver fibrosis model was established and the rats were sacrificed and their various tissues were obtained for the same analyses. Western blotting and RT-PCR were used to validate the expression of the changed proteins after treatment of IFN beta-1a in LX-2 cells and of various tissues of the rats.

RESULTS708 +/- 25 spots were detected in control LX-2 cells and 804 +/- 32 spots in IFN beta-1a-treated LX-2 cells. A match rate of 73%-82% was achieved. The results also showed that 31 protein spots displayed quantitative changes in expression after IFN beta-1a treatment. Of the 31 spots, 21 proteins were identified, of which, one was newly found, two were enhanced in abundance and 18 showed lower expressions. The newly found protein was glia maturation factor beta (GMF beta). The treatment of LX-2 with IFN beta-1a increased the production of GMF beta(GMF beta) protein in comparison with the untreated cells (t=1.81, P < 0.01). The expression of GMF beta protein (1.81 vs 0.10) and mRNA (0.85 vs 0.12) were more in the normal liver tissues than in the cirrhotic liver tissues (t=2.53, 2.13 respectively, P < 0.01). The expressions of GMF beta protein and mRNA were weak in rat heart and lung tissues, however, they were strong in rat liver, kidney, spleen and brain tissues (t=1.91, 1.94 respectively, P < 0.01).

CONCLUSIONThere is a significant difference of protein expression levels between IFN beta-1a untreated and treated LX-2 cells. These proteins, especially GMF beta, may be involved in an inhibition process of IFN beta-1a on activation and apoptosis of LX-2 cells. This proteome study may be useful in further studies of the relationship of IFN beta-1a treatment and human liver diseases.

Animals ; Cell Line ; Female ; Glia Maturation Factor ; metabolism ; Hepatic Stellate Cells ; metabolism ; Humans ; Interferon beta-1a ; Interferon-beta ; pharmacology ; Liver ; cytology ; Liver Cirrhosis ; metabolism ; Proteome ; Rats ; Rats, Sprague-Dawley

OBJECTIVESTo study the effects of rat endothelial progenitor cell (EPC) transplantation on hepatic fibrosis in carbon tetrachloride (CCl4) induced hepatic fibrosis rats.

METHODSHepatic fibrosis was developed in 24 healthy female SD rats by feeding them 25% CCl4/olive oil for 8 weeks. Eight of them were sacrificed at the end of the 8 weeks. The rats were subdivided into a EPCs transplanting group (n=8) and a saline control group (n=8). After the EPCs were isolated and cultured for 9 days, the cells were injected into the portal veins of the rats in the EPCs transplanting group. Four weeks later all of the rats were sacrificed. The blood biochemical parameters from the serum were examined. The degree of liver fibrosis was evaluated by reading Masson staining liver slides and by detecting the expression of a-SMA and collagen III.

RESULTSCompared with the saline control group, hepatic activity index (HAI), levels of ALT, AST and TBil in the serum were all lower in the EPCs transplanting group, but the level of Alb was higher and the expression of a-SMA and collagen III were lower. Compared with the 8 week hepatic fibrosis group, the levels of ALT, AST and TBil in the serum of the EPCs transplanting group were all lower. In the saline control group, the serum levels of ALT, AST and TBil were higher, the level of Alb was lower, and the expressions of a-SMA and Collagen III were higher.

CONCLUSIONIn hepatic fibrosis rats, transplantation of rat EPCs could minimize the hepatic fibrosis process and the injuries.

Animals ; Carbon Tetrachloride ; Endothelial Cells ; cytology ; Female ; Liver Cirrhosis, Experimental ; chemically induced ; pathology ; therapy ; Rats ; Rats, Sprague-Dawley ; Stem Cell Transplantation

Xingnaojing (XNJ) is an effective clinical drug used to treat acute stroke. Compared with injection administration, its nasal administration has better brain targeting. Therefore, through nasal administration, XNJ microemulsion could help solve the drug load of compound components of different polarities contained in large-dose and high-concentration traditional Chinese medicines, and reduce irritation to nasal mucosa In this study, the modified volume correction method and the improved rat in situ nasal perfusion model were adopted to compare the nasal absorption of geniposide contained in different XNJ preparations. The results showed that the constant absorption rate of geniposide (GE) in XNJ-D was (2.95 +/- 0.25) x 10(-3) min(-1), whereas the constant absorption rate of GE in XNJ-M was (2.16 +/- 0.21) x 10(-3) min(-1). This indicated that the rat nasal absorption of GE in different XNJ preparations complied with the first-order process and could be considered as passive absorption. GE in XNJ-D was absorbed faster than that in XNJ-M, which provided basis for the development of nasal preparations of XNJ.
Absorption ; Administration, Intranasal ; Animals ; Drugs, Chinese Herbal ; pharmacokinetics ; Emulsions ; Iridoids ; pharmacokinetics ; Male ; Nose ; metabolism ; Rats ; Rats, Sprague-Dawley

Cell Line ; Hepatic Stellate Cells ; drug effects ; metabolism ; Humans ; Interferon-beta ; pharmacology

Objective To evaluate whether 18F-fluorothymidine(FLT) can be used to monitor early response to irradiation in colorectal cancer (CRC).Methods SW480 cells were cultured and irradiated with 0, 10, and 20 Gy.Twenty-four hours later, morphological changes, apoptosis, necrosis, proliferation,and cell cycle phases were observed.Uptake of 18F-FLT was measured in these tumors in vitro from 24 h to 72 h after irradiation.The one-way analysis of variance was used to analyze the data.Results Apoptotic and necrotic cells were detected 24 h after radiotherapy.SW480 cells proliferation was significantly delayed after irradiation in 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenylte-trazolium bromide (MTI) assay.Cell cycle analysis showed that SW480 cells had a decreased fraction of cells in S phase( from 33.23% to 9.24%,then to 5.43% ) and an arrested fraction in G0-G1.After SW480 cells were cultured for60 min, the uptake of 18F-FLT was (5.21 ± 1.60) %; and 24 h after irradiation of 10 Gy, the uptake decreased significantly to (4.27±0.48)% (F=8.253, P=0.009).And 72 h after irradiation, the uptake further decreased significantly to (3.39 ± 0.59) % ( F = 36.715, P＜0.001 ).In tumor tissue, the uptake of 18F-FLT reduced significantly 72 h after radiotherapy (10 Gy:F = 12.388, P = 0.007; 20 Gy:F = 16.744, P = 0.004) and the attenuation degree increased with the radiation dose.Conclusion The uptake of 18F-FLT in SW480 cells or in CRC could reflect the changes of SW480 cells in proliferation, cell cycle re-distribution, cell apoptosis and necrosis.The results suggest that 18F-FLT may be used for monitoring early response to irradiation of CRC.

Objective To evaluate the predictive value of 18F-fluorodeoxyglucose (FDG) and 18F-fluorothymidine(FLT) PET in monitoring the metastatic potential of human colorectal cancer (CRC).Methods Human CRC cell lines SW480 and SW620 were cultured and implanted into nude mice to create CRC models. Tumor growth,metastatic status and survival were assessed in CRC bearing mice. Uptake of 18F-FDG and 18F-FLT in SW480 and SW620 cells was detected In vitro at 0,30,60,90,120 min after incubation. PET images of both tracers were acquired for SW480 and SW620 tumor-bearing mice using the small animal PET at 60 min after tracer injection. Region of interest (ROI) was drawn using Image J software on reconstructed PET images. Immunocytochemistry and Western blot analysis of the tumor tissue were performed. The correlation between tracer uptake and tumor marker expression was evaluated using linear regression. Results Compared with SW620 tumor-bearing mice,SW480 induced tumor grew much faster ( t = - 3.332,P = 0.004),the tumor-bearing mice had more serious dyscrasia ( t = 2.240,P = 0.038 ),shorter survival and higher metastatic rate. In vitro study,the uptake of both 18F-FDG and 18F-FLT in SW620 cells was lower than that in SW480 cells. 18F-FLT uptake was higher than 18F-FDG uptake in both SW480 and SW620 cells. After incubation for 60 min,the uptake of 18F-FDG in SW480 and SW620 cells was ( 1.76 ± 0.87 )% and ( 1.14 ± 0.38 )%,respectively ( t = - 2.507,P = 0.021 ); while the uptake of 18F-FLT in SW480 and SW620 cells was (5.21 ± 1.60)% and (2.90 ± 1.82)%,respectively (t =3.497,P =0.002). In micro-PET study,the 18F-FDG radioactivity ratio of tumor to non-tumor (T/NT) in SW480 and SW620 tumors was 2.69 ± 0.98 and 3.09 ± 1.26 respectively (t =0.657,P =0.524); while T/NT of 18F-FLT in SW480 and SW620 tumors was 3.65 ±0.51 and 2.22 ±0.42 (t =6.491,P ＜0.001 ),respectively. In immunocytochemistry and western blot assay,heat shock protein(HSP) 27,Integrin β3,vascular endothelial growth factor receptor 2 ( VEGFR2 ) and Ki67 were all over expressed in two kinds of tumor cells with different intensities. HSP27 and Integrin β3 expression was higher in SW480 cells than that in SW620 cells. While VEGFR and Ki67 expression was lower in SW480 cells than that in SW620 cells. The uptake of 18F-FLT closely correlated with the expression of HSP27 ( r =0.924,P =0.004) and Integrin β3 (r=0.813,P =0.025). 18F-FDG uptake inversely correlated with the survival of tumor-bearing mice (r =0.500,P=0.017). Conclusions The uptake of 18F-FDGand 18F-FLT may reflect different biological characteritics of CRC. High 18F-FLT uptake in CRC on PET scan may predict high metastatic tendency.

OBJECTIVETo develop a new high-performance liquid chromatographic (HLPC) method for determination of propofol in human serum.

METHODSHuman serum samples were precipitated with 20% perchloric acid and centrifuged to obtain 50 microl of the supernatant for analysis by HPLC coupled with fluorescence detection. The analysis was performed with a C(18) reversed-phase column using a acetonitrile-water (90:10) phase delivered at 1.0 ml/min, with the excitation wavelength of 276 nm and emission wavelength of 310 nm.

RESULTSThe calibration curves were linear (r=0.997 5) within the concentration range of 0.05-10 microg/ml, the limit of propofol quantification was 50 ng/ml and the intra- and inter-day precisions were between -/+15%.

CONCLUSIONSThe method is accurate, sensitive and simple for propofol determination in clinical anesthesia.

Anesthetics, Intravenous ; blood ; chemistry ; Chromatography, High Pressure Liquid ; methods ; Fluorescence ; Humans ; Propofol ; blood ; chemistry ; Reproducibility of Results ; Spectrometry, Fluorescence ; methods