Objective To study the inhibitory effects of hydroxyapatite nanoparticles on liver VX2 tumor in rabbits after intratumoral injection. Methods 40 rabbits with implantation of liver VX2 tumors were randomly divided into 4 groups and intratumorally injected with different preparations.Group A: (control group), 1 ml nomal saline containing 0.2% CMC-Na; Group B: ( 5-Fu group),20 mg/ml 5-Fu 1 ml; Group C: (Nano HAP), 20 mg/ml Nano HAP 1 ml; Group D: (5-Fu+Nano HAP), 20 mg/ml 5-Fu 1 ml and 20 mg/ml Nano HAP 1 ml. Ultrasonography was performed to measure liver tumor volume 7, 14, 21 d after treatment. Survival durations of the animals were recorded. Tumor tissues and liver tissues close to tumor were obtained and examined histologically.Results The average tumor volumes 7, 14 and 21 d after treatment were (4.93 ±0.76)cm3,(15. 67±2.75)cm3 and (52. 36±10. 57)cm3 in group A, (4. 16±0. 33)cm3 , (10. 26± 1.60)cm3 and (18. 89±4.65)cm3 in group B, (1.43±0.13)cm3 , (3.69±0.77)cm3 and (9.51±2.09)cm3 in group C, (2. 80±0.46)cm3 , (3. 77±0. 91)cm3 and (8. 46±0.95)cm3 in group D respectively. The average tumor volumes of groups B, C and D were significantly smaller than that of group A in the same time phases after treatment. The life span of group C was longer than that of other three groups, and there was no statistically significant difference between group B and group D, although the two groups were significantly longer than group A. Blood flow was not detected by color Doppler or power Doppler in group C and group D. Pathological examination showed that there was obvious intratumoral necrosis in group C and D. Tumor in group B exhibited thoroughgoing necrosis. Conclusion Hydroxyapatite nanoparticles intratumoral injection is safe and feasible for treatment of liver tumor. Hydroxyapatite nanoparticles can exert a significant inhibitory effect on liver VX2 tumor growth in rabbits without liver toxicity.

Objective To investigate the effects of SAHA on the differentiation of human hepatocellular carcinoma(HCC)SMMC-7721 cells.Methods Cell morphology was examined by light microscopy;Cell viability was determined by MTT assay;The expression of Alpha-fetoprotein(AFP)and proliferating cell nuclear antigen(PCNA)was analyzed with immunocytochemistry;Flow cytometry(FCM)was used to investigate the cell cycle;The expression of p21 WAF1 mRNA was detected by semi-quantitative RT-PCR.Results Light microscopy showed that SMMC-7721 cells induced by SAHA underwent restorational alterations in morphology which were different from those of nontreated cells but were similar to those of normal cells;MTT assay showed that SAHA inhibited the proliferation of SMMC-7721 cells in a dose-dependent and time-dependent way;Immunocytochemistry assay showed that the expression of AFP and PCNA decreased significantly;FCM analysis showed SAHA could arrest SMMC-7721 cells at G0/G1 phase,with an accumulation of the cells at G0/G1 phase while a decrease of cells at S phase;Semi-quantitative RT-PCR detection revealed that the expression of p21 WAF1mRNA was upregulated remarkably in the cells treated with SAHA.Conclusion SAHA could induce differentiation of human HCC SMMC-7721 cells inhibiting enzymatic activity of HDAC,upregulating the expression of p21 WAFlmRNA as well as causing arrest of HCC cells at G0/G1 phase.

Objective To study the relationship between the expression level of human telomerase reverse transcriptase (hTERT) protein and telomerase activity as well as its clinical significance in hepatocellular carcinoma (HCC). Methods Immunohistochemical SP method was employed to detect hTERT protein expression in 52 cases of HCC and paired adjacent tumor tissues, and telomerase activity was examined in these samples with telomeric repeat amplification-ELISA. Results The positive rates of hTERT protein expression and telomerase activity in HCC were 86.5%(45/52) and 80.8%(42/52), respectively, which were significantly higher compared with the adjacent tumor tissues(P

Objective To investigate the relationship between hypoxia inducible factor-1?、angiopoietin2 and vascular endothelial growth factor and angiogenesis in hepatocellular carcinoma(HCC).Methods The(expression) of hypoxia inducible factor-1?、angiopoietin2 and vascular endothelial growth factor mRNA was(detected) in 52 HCC surgical specimens.And microvessel density(MVD) in tissue specimens of patients with coexpression of the parameters was examined.Results Of the 52 surgical specimens,36 cases had over(expression) of HIF-?、angiopoietin and VEGF protein,and coexpression of HIF-? and angiopoietin and VEGF mRNA in 38 of 52 cases.The expression of HIF-?、angiopoietin was related with the expression of VEGF(r_1= 0.783,P

Objectives To investigate whether apoptosis can be induced by Octreotide in human hepatoma cells in vitro and elucidate the antineoplastic mechanism of Octreotide in hepatoma.Methods A cultured human hepatoma cell line,BEL-7402,was exposed to Octreotide and apoptosis was evaluated by cytochemical staining(Hochesst 33258),transmission electron microscopy,agarose gel electrophoresis and flow cytometry(FCM).Results After exposure to 0.2 μg/ml Octreotide,apoptosis with nuclear chromatin condensation as well as fragmentation,cell shrinkage and the formation of apoptotic bodies was observed using cytochemical staining and transmission electron microscopy.A DNA ladder in agarose gel electrophoresis was also displayed.FCM showed that the apoptotic cell number rose with an increase in the concentration of Octreotide(0- 2 iμg/ml).There was a positive correlation between Octreotide concentration and apoptotic rate in BEL-7402 cells(r=0.809,P＜0.05).Conclusion Apoptosis in human hepatoma cells can be induced by Octreotide,which may be related to the mechanism of antineoplastic action of Octreotide in hepatoma.

AIM: To study the relation ship between stress and lung injury caused by acute hemorrhagic necrotizing pancreatitis(AHNP) through AHNP model.METHODS: The AHNP model was made by using 5% sodium taurocholate retrograded injection into biliopancreatic duct in SD rats. Those rats were divided into three groups randomly, from A to C, the A group undertook sham operations, the B group was made into AHNP model, and the C group was given Metyrapone. The level of corticosteroid, CRP and amylase in serum had been observed. The lung and pancreas histological examinations were also performed.RESULTS: In C group, the level of corticosteroid, CRP and amylase were much lower than those in B group. The grade of lung and pancreas injury were also lower than those in B group(P

ObjectiveTo study the early diagnosis and prevention of fungal infection in severe acute pancreatitis(SAP). Method 1.SAP patients from July 1998 to June 2002 were prospectively randomized into 3 groups: garlicin prevention group, fluconazole (low dosage) prevention group and control group, the incidence of fungal infection in SAP was compared between the groups. For fungal infection patients, the fungal clearance and mortality rate were observed. 2.Clinical data of SAP patients with fungal infection and with simple bacterial infection was compared by multivariate logistic regression, and clinical characters and risk factors of fungal infection were evaluated. Results 1.There were lower incidences of fungal infection in garlicin group (16% vs. 30%,P

Objective To investigate the value of TAP in the early prediction of severe acute pancreatitis (SAP) and to compare it with acute physiology and chronic health evalutionⅡ (APACHEⅡ).Methods We observed the association between TAP concentration and the severity of acute pancreatitis with competitive enzyme-linked immunosorbent assay(ELISA). Urine samples were collected for the measurement of TAP concentration at admission, 24,48,and 72*!h after from 41 patients with acute pancreatitis (AP) (12 severe cases, and 29 mild) who presented within 48*!h of the onset of symptoms and from 11 control patients, while APACHEⅡ scores were recorded at 48*!h after admission. Results The TAP at admission of SAP (95*!nmol/L) was signficantly higher than that of mild (20*!nmol/L; P

Objective To study the clinical characteristic and correlation factors of fungal infection in severe acute pancreatitis(SAP). Methods Clinical data of SAP patients with fungal infection (fungus infection group-F1 group) and with bacterial infection (bacteria infection group, B1 group) in January,1994-December,2001 were retrospective analysed and compared. Results There were 40 cases in F1 group, 84 cases in B1 group. There were no significant difference in age, sexual, causes, APACHE II score between the two groups, Hospitalization in F1 was significantly longer than that in B1 group (57.7d∶42.7d, P= 0.044 ).Diabetes-mellitus, SAP grade II, multi-operation, intestinal and/or bile duct fistulas were related to fungal infection in SAP; mortality in F1 group was significantly higher than that in B1 group (P= 0.02 ). Conclusions Diabetes-mellitus, SAP grade II, multi-operation, intestine and/or bile duct fistulas are the risk factors of patients with severe acute pancreatitis developing fungal infection; fungus infection can increase the mortalily of SAP patients.Extra-pancreas fungal infection is commonly seen in digestive tract, respiratory tract and urinary system. unknown consciousness change and massive bleeding may indicate that the patient is complicated with fungal infection.

Objective To investigate the effects and mechanism of magnetic microsphere combination of cisplatin with nano or micron ferric oxide particle on human hepatoma cell(HHC). Methods A human hepatoma cell line BEL-7402 was used in this study, 0.04?g/ml～8?g/ml of cisplatin(CDDP), cisplatin nano-ferric oxide magnetic microsphere(nCDDPmm) and micro-ferric oxide magnetic microsphere(mCDDPmm) were administered to the culture solution for culturing the BEL-7402 cell as the experimental groups,and in the control groups were administered with cisplatin 0?g/ml and magnetic microsphere without cisplatin respectively. The optic density of viable cell, cytotoxity index, growth curve of cell, cell cycle, proliferation index and apoptosis were assayed by MTT method, cell count and flow cytometry respectively. Results (1)The viable cell's optic density decreased and the cytotoxity index increased in human hepatoma cell following increasing dosages of CDDP, nCDDPmm and mCDDPmm in culture solution,presenting a dose-dependent manner(r value of three drugs were 0.95, 0.91 and 0.89 respective, P 0.05)between nCDDPmm and mCDDPmm. (3)Apoptosis rate of hepatoma cell increased ( P