AIM To study the targeted transfer and expression of human endothelial nitric oxide synthase gene-immunoliposome delivery system mediated by caveolin-1 antibody in hypercholesterolemic endothelial cells. METHODS Cultured ECV304 cells were divided into normal and hypercholesterolemic groups and transfected with control vector pcDNA3.1, cationic liposome-eNOS complex (lip-eNOS) or polylysine modified caveolin-1 antibody-cationic liposome-eNOS complex (Ab-lip-eNOS) respectively. The negative control group was also used. The experiments were made in triplicates. 48 h after transfection, the cellular eNOS mRNA was detected by RT-PCR, the eNOS activity assayed by NADPH-diaphorase staining and the generation of NO in medium determined by Griess method. RESULTS Ab-lip-eNOS and lip-eNOS could efficiently induce the expression of exogenous eNOS gene in endothelial cells cultured in normal or hypercholesterolemic condition, increase eNOS mRNA level, eNOS activity and NO content, which were significantly different from the endogenous eNOS gene expression of negative control and control vector groups (P

Objective To investigate the effects of different concentrations of sevoflurane on adhesion and expression of CD 44 in human breast cancer cell line MCF‐7 .Methods The cells were randomly divided into 4 groups :control group and 3 sevoflurane groups exposed to 1 .7% ,3 .4% and 5 .1% sevollurane for 2 ,4 and 6 h respectively .Cell adhesion rate was detected by adhesion test and the expression of CD44 mRNA and protein was determined by qRT‐PCR .Results in Treat 1 ,2 ,3 ,the adhesion rate at 2 ,4 ,6 h were lower than that before treat ,mRNA expression of CD44 reduced (P<0 .05);the adhesion rate of Treat 2 and Treat 3 at 4 and 6 h were lower than that of 2 h ,and the mRNA expression of CD44 reduced (P<0 .05);the adhesion rate of Treat 2 and Treat 3 at 6 h were lower than that of 4 h ,and the mRNA expression of CD44 reduced (P<0 .05);compared with Control group ,the adhesion rate of Treat 1 ,2 and 3 at 2 ,4 ,6 h were all lower ,mRNA expression of CD44 reduced (P<0 .05);the differences between each group were statisyicaly significant(P<0 .05) .Conclusion Sevoflurane can inhibit cell adhesion in a concentration and duration of exposure dependent manner ,and its mechanism could be related with the down regulation of CD44 expression .

Objective To explore the impact of psychological alignment and coping style on nurse′s job satisfaction. Methods A total of 389 clinical nurses were investigated by the Sense of Coherence Scale, the simplified Coping Style Questionnaire and Minnesota Satisfaction Scale. Results The scores of job satisfaction, psychological alignment, positive coping and pessimistic coping of clinical nurses was (72.91 ± 11.10), (56.97 ± 10.29), (23.16 ± 5.40) and (9.80 ± 4.03) points respectively. The predictors of job satisfaction were sense of control, sense of meaning and positive coping style. Conclusions It is suggested that nursing managers should pay close attention to nurses′psychological alignment and guide clinical nurses adopt positive coping style, and thereby to improve nurses′job satisfaction.

Adult ; Aged ; Animals ; Antineoplastic Agents ; therapeutic use ; Combined Modality Therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Follow-Up Studies ; Humans ; Leeches ; Lymphatic Metastasis ; Male ; Materia Medica ; Middle Aged ; Nasopharyngeal Neoplasms ; drug therapy ; pathology ; radiotherapy ; Phytotherapy

Purpose To investigate the pathological characteristics of loco-regional recurrent nasopharyngeal carcinoma ( rNPC ) . Methods Nasopharyngeal biopsy specimens of 46 rNPCs and 63 primary NPCs were collected. HE staining, immunohistochemistry and EBV small RNAs ( EBERs) in-situ hybridization were performed. Results The over-expression rates of both p63 and CK5/6 in rNPC were significantly higher than those of primary NPCs (P=0. 005, P=0. 026), while no statistical significance of Ki-67 over-ex-pression existed between the two groups ( P=0. 387 ) . More necrotic tissues, inflammatory exudates, giant bizarre carcinoma cells, desmoplastic stroma, giant bizarre tumor cells and higher degree of squamous differentiation were found in rNPCs. The carcinoma cells of 5 rNPCs were negative for both EBERs in-situ hybridization and LMP-1 immunohistochemical staining. Conclusion The loco-re-gional rNPC has two peaks of latency interval:2~5 and 9~11 years. The loco-regional rNPC cells have higher degree of squamous differentiation with higher expression of p63 and CK5/6, as well as more invasive ability. In addition, both EBERs in-situ hybridization and LMP-1 immunostaining are negative in 10. 87% (5/46) of loco-regional rNPC.

Objective To retrospectively compare the safety and local efficacy of multiple-electrode switching based radiofrequency ablation (RFA) and the conventional RFA in treating single early-stage hepatocellular carcinoma (HCC).Methods A total of 82 patients with single early-stage HCC received either RFA with a multiple-electrode switching system (n =43) or conventional RFA (n =39) as the first-line treatment.The rate of initial local complete response,major complications and local tumor progression (LTP) were compared between two groups.Results The total ablation time was significantly shorter in the switching-RFA group [(16.7 ± 3.4) mins] than in the conventional RFA group [(29.8 ± 10.4) mins] (P ＜ 0.05).The rate of initial local complete response was 100％ (43/43) in the switching-RFA group and 94.9％ (37/39) in the conventional RFA group (P ＞0.05).After a mean follow-up period of (26.4 ± 21.8)months (ranging 3.0-91.6 months),the rates of LTP in the switching-RFA group and conventional RFA group were 16.3％ (7/43) and 17.9％ (7/39),respectively.The LTP rates in two groups were 16.1％ versus 11.2％ atyear1,and20.5％ versus 20.6％ at year2 (P=0.666).Conclusions The multiple-electrode switching based RFA is safe and effective with shorter ablation time in treating single early-stage hepatocellular carcinoma.

Objective To study the expression and pathologic significance of CD147,cyclophilin A (CyPA)and cyclophilin B(CyPB)in psoriatic lesions.Methods Immunohistochemical method was ap- plied to detect the expression of CD147,CyPA and CyPB in skin specimens of 15 patients with psoriasis pustulosa(PP),20 patients with progressive psoriasis vulgaris(PPV),and 20 patients with inactive psori- asis vulgaris(IPV).Immunoreactivity intensity distribution index(IRIDI)was calculated to assess the expres- sion intensity of CD147,CyPA and CyPB.Results CD147,CyPA and CyPB were detected in all speci- mens.The IRIDI scores of CD147 and CyPA were significantly higher in keratinocytes of psoriatic lesions than in those of the control specimens(all P0.05).The IRIDI score of CyPB in T lymphocytes of PP lesions was significantly elevated than that in PPV lesions,which was in turn higher than that in IPV lesions(all P0.05).Conclusion CD147,CyPA and CyPB may play a role in the occurrence and development of psoriasis.

OBJECTIVEThe metabolic character of tetramethylpyrazine (TMPz) in rat liver microsomes was studied in vitro and in vivo to identify which isoforms of cytochrome P450 were responsible for TMPz metabolism in rats, offer the theoretical foundation for the fact that it is rational to use medicine in clinic.

METHODSet up UV- HPLC method of TMPz, determine concentration of TMPz and its formation in rat plasma and liver microsomes incubation solution, analyze the correlation between TMPz's metabolic eliminate rate and each inducer. Erythromycin( ERY) N-demethylase activity of each sample in rat liver microsomes was measured using N-demethylation reaction of ERY as probe. The correlation between the rate of TMPz metabolite formation and the demethylase activity was analysed. After the SD rats who had been treated with inducer, inhibitor, or untreated, received administration of TMPz in vein, the plasma concentration of TMPz were determined by HPLC. Pharmacokinetic parameters of TMPz were computed and compared.

RESULTThe disppearing rate of TMPz in the incubation solutions of the rats liver microsomes, which treated with DEX, were markedly quicker than that of control group (P < 0. 01) , while no obvious difference between P-NF group or PB and control group was observed (P > 0. 05). The activity of ERY-N-demethylase in DEX-induced group was corespondingly enhanced, was much higer than that in control group. The correlation between the rate of TMPz metabolic product formation and the activity of N-demethylase was significant. After using Ket, the CYP3A inhibitor, the metabolism of TMPz could be significantly inhibited the metabolism of TMPz in rat liver microsomes. In vivo, CL( s) were larger than that of the control group,t,/2 were smaller than the control group in DEX group; By contrary, CL(s) was smaller than the control group,t1/2 was larger than the control group in Ket group.

CONCLUSIONResults suggest that CYP3A plays a major role in TMPz metabolism in rats, TMPz lie in the possibility of Interaction among the medicines between TMPz and CYP3A inducers or inhibitors when they are used in clinic.

Animals ; Cytochrome P-450 CYP3A ; metabolism ; Cytochrome P-450 CYP3A Inhibitors ; Dexamethasone ; pharmacology ; Ketoconazole ; pharmacology ; Male ; Metabolic Clearance Rate ; Microsomes, Liver ; drug effects ; enzymology ; metabolism ; Pyrazines ; blood ; metabolism ; pharmacokinetics ; Random Allocation ; Rats ; Rats, Wistar ; Vasodilator Agents ; blood ; metabolism ; pharmacokinetics

OBJECTIVETo determine the expression of kidney aquaporin-2 (AQP2) and urine AQP2 excretion in chronic heart failure (CHF) rats and investigate effects of perindopril on the expression and excretion of AQP2.

METHODSSixty rats were randomized into three groups: control group, CHF group, CHF + Perindopril group. According to left ventricular myocardial infarction size, CHF group and perindopril group were further divided into heart failure subgroup (LVMI ≥ 20%) and cardiac functional compensation subgroup (LVMI < 20%), respectively. Blood and urine samples were collected from the rats for measuring serum Na(+), urine volume and urine osmolality. The concentration of plasma arginine vasopressin (p-AVP) was detected by radioimmunoassay (RIA). Immunohistochemistry, semi-quantitative real time-polymerase chain reaction (RT-PCR) and Western blot were performed for measurement of kidney inner medullary AQP2. The concentration of Urine AQP2 was measured by indirect enzyme-linked immunosorbent assay (indirect ELISA).

RESULTSImmunohistochemistry, RT-PCR, Western blot examinations revealed increased quantity of the inner kidney medullary AQP2 expression (0.2013 ± 0.0417), AQP2 mRNA (0.98 ± 0.33) and AQP2 protein expression (0.94 ± 0.21) in heart failure subgroup (n = 13) compared to control group (n = 20, 0.1518 ± 0.0214, 0.58 ± 0.51, 0.51 ± 0.46), which could be significantly by perindopril (n = 13, 0.0712 ± 0.0218, 0.76 ± 0.45, 0.82 ± 0.49, all P < 0.05 vs. heart failure subgroup). The concentration of plasma arginine AVP [(19.72 ± 3.91) ng/ml] and Urine AQP2 [(82.52 ± 11.77) ng/L] were significantly higher in heart failure subgroup than in control group [n = 20, (51.67 ± 12.58) ng/L, (6.94 ± 3.10) ng/ml] (P < 0.05), which were significantly reduced by perindopril [n = 13, (15.65 ± 4.10) ng/L, (71.65 ± 9.21) ng/ml].

CONCLUSIONIncreased expression of the kidney inner medullary AQP2 and the excretion of urine AQP2 in chronic heart failure rats could be reduced by perindopril.

Animals ; Aquaporin 2 ; metabolism ; urine ; Disease Models, Animal ; Heart Failure ; metabolism ; Kidney ; drug effects ; metabolism ; Male ; Perindopril ; pharmacology ; Rats ; Rats, Sprague-Dawley

Objective　To explore the relationship between hemolymph phenol oxidase and the melanization of Plasmodium yoelii oocysts in Anopheles dirus. Methods　An Anopheles dirus-Plasmodium yoelii system was used Anopheles dirus were divided into 3 groups, that is, non-blood-fedding (N), normal-blood-fedding (B) and infected-blood-fedding (I). The activities of MPO and o-DPO in hemolymph from 3 groups were determined with native polyacrylamide gel electrophoresis (PAGE) and density scanning at 5, 7, 11 and 15 d after blood feeding. Results　Both MPO and o-DPO activity were significantly higher in group I than group N and B (P<0.05). But with the melanization of Plasmodium yoelii oocysts, both MPO and o-DPO activity in group I were decreased in comparison with group N, especially on the 15 th day after infected-blood feeding. MPO and o-DPO activity in group B were significantly stronger than those of group N. Conclusion　Blood feeding and infection of Plasmodium yoelii both can activate the cascade. The heamolymph phenol oxidase may play an important role in the melanization of Plasmodium yoelii oocysts in Anopheles dirus.