ObjectiveTo study the effects and mechanism of survivin gene on invasion of prostate cancer cell.MethodsAfter PC-3 prostate cancer cell lines were transfected by survivin small interfering RNA (siRNA), the mRNA and protein of survivin and matrix metalloproteinase-2 and-9 were determined by real time RT-PCR and western blot assay, respectively. The anchorage-independent growth was examined by clon formation in soft agar, and invasion ability was evaluated by boyden chamber model.The invasion ability of cancer cells in vivo was determined by nude mice model. ResultsThe results from clon formation in soft agar showed that the colonies numbers of group of 3.125,6.250 and 12.500 nmol/L of siRNA were 17.8±1.6,13.6±1.5 and 8.8±1.4, and the control group was 22.6±1.8(P<0.05). The results from boyden chamber model exhibited that the cells numbers crossing filter membrane in group of 3.125,6.25 and 12.5 nmol/L of siRNA were 33.6±2.1,19.5±1.9,8.1±1.83, and the control group was 49.4±2.3(all P<0.05). The results in vivo showed that cancer cells of control groups invaded into striped muscle and blood vessel, and there were no these phenomenons in transferred group with survivin siRNA. Survivin siRNA could reduce expression level of MMP-2 and MMP-9 in prostate cancer cells(P<0. 01).Conclusions Survivin-directed RNA interference can inhibit invasion of human prostate cancer cell through down-regualting MMP-2,-9 genes.

Objective To study the effects and mechanism of evodiamine on human colon cancer cell. Methods After human colon cancer SW620 cell were treated with different doses of evodiamine, the growth of anchorage independence of cancer cell was studied by colony formation in soft agar, and invasion ability was determined by Boyden chamber,and the level of mRNA and protein of midkine gene was detected by real time RT-PCR and Western blot assay, respectively. Results Ecodiamine could significantly inhibit both invasion ability and anchorage independence growth in dose-dependent manners. The level of mRNA and pro-tein of midkine of cancer cells treated with evodiamine reduced in time-and dose-dependent manners Conclusion Evodiamine could inhibit invasion of colon carcinoma cell through down-regulating of midkine expression.

Biomedical Research ; trends ; Carcinoma, Squamous Cell ; secondary ; Head and Neck Neoplasms ; pathology ; Humans ; Neck

OBJECTIVE: To establish a HPLC method for the determination of the content of Demethylbellidifolin in different parts of Swertia davidi Franch. METHODS: The analysis was carried out on Hypersil C18 column (150mm?4.6mm,5 ?m) at room temperature with mobile phase consisted of CH3OH-0.5%H3PO4(56∶44) at a flow-rate of 1.0mL?min-1.The detection wavelength was set at 254 nm. RESULTS: The linear range of Demethylbellidifolin was 0.52～2.60?g (r=0.999 4) and the average recovery was 99.77%(RSD=0.95%).CONCLUSION: The method is simple, rapid, reproducible, and suitable for the determination of the content of Demethylbellidifolin in Swertia davidi Franch..

AIM: To study the effects of Cripto gene on vascular endothelial growth factor(VEGF) of colon carcinoma cells.METHODS: Cripto siRNA was designed and constructed.Colon cancer LS-174T cells were divided into 4 groups: control group and different dose (3.125,6.25 and 12.5 nmol/L) of siRNA groups.After transfected for 24,48 and 72 h,colon cancer cells were harvested to carry on the next tests.Expression of Cripto mRNA was determined with real-time PCR,and immunofluorescence isothiocyanate(FITC) labeling assay and Northern blotting were performed to examine the expression of protein and mRNA of VEGF,respectively.The cells in control group and cells transfected with 12.5 nmol/L siRNA were inoculated into nude mice respectively.30 days after inoculated,the mice of two groups were executed,and immunohistochemical(ICH) assay was used to evaluate the VEGF protein of mice tumor.RESULTS: siRNA down-regulated the Cripto mRNA in a dose and time dependent manner.Protein and mRNA of VEGF in transfected cells reduced in a dose and time dependent manner.Compared to control,the expression of VEGF protein from ICH assay was lowered significantly(P

Objective To evaluate operative methods and the clinical effect for comminuted calcaneal fractures.Methods 21 cases(24 feet)of comminuted calcaneal fractures were treated by one stage bone grafting plus open reduction and internal fixation with plastic calcaneus titanium plate.The fractures were classified according to the Sanders system into Sanders Ⅱ,Ⅲ and Ⅳ subgroups.Results All cases were followed up for 9～20 months(14months in average).All cases recovered with good healing of fracture.According to Maryland score,the results were excellent in 14 feet,good in 7 feet,fair in 2 feet,and poor in 1 foot.The excellent and good rate was 87.5％.Conclusions By using the method of internal fixation with plastic calcaneus titanium plate,fracture site can be well exposed,which is helpful to recover calcaneus to its normal length,width,height,Gissane angle and Bohler angle.A reliable internal fixation is helpful for early stage functional excise after surgery,which can maximize the recovery of the ankle function.

Objective To investigate the effect of sodium valproate in suppression of cell proliferation and arrest of cell cycle of in human hepatoma cell line SMMOL/LC-7721 and pancreatic cancer cell line PaTu8988.Methods Hepatoma cell line SMMOL/LC-7721 and pancreatic cancer cell line PaTu8988 were inoculated on the culture plate,cultured in the DMEM medium,they were intervened with sodium valproate in concentration of 0.2 mmol/L (0.2 mmol/L group),1.0 mmol/L (1.0 mmol/L group),5.0 mmol/L (5.0 mmol/L group) and dimethyl sulfoxide (control group) for 48 h respectively.Absorbance was measured by enzymelinked immunosorbentassay equipment,and inhibition ratio was calculated.Cell cycle was detected by flow cytometry.Results The absorbance of hepatoma cell line SMMOL/LC-7721 and pancreatic cancer cell line PaTu8988 in 5.0 mmol/L group were significantly lower than those in control group and 0.2 mmol/L group (0.569 ±0.059 vs.0.706 ±0.033 and 0.760 ±0.020,2.068 ±0.178 vs.2.793 ±0.144 and 2.663 ± 0.078,P ＜ 0.05),the absorbance of pancreatic cancer cell line PaTu8988 in 1.0 mmol/L group (2.432 ± 0.084) was significantly lower than that in control group and 0.2 mmol/L group (P ＜ 0.05).With the sodium valproate concentration increased,inhibition rate of tumor cell increased gradually,the inhibition rate of hepatoma cell line SMMOL/LC-7721 and pancreatic cancer cell line PaTu8988 in 5.0 mmol/L group was 23.5％ and 25.9％ respectively.Compared with control group,with the sodium valproate concentration increased in 0.2,1.0,5.0 mmol/L group,the proportion of G1 phase cell increased gradually in hepatoma cell line SMMOL/LC-7721 [(49.25 ± 1.63)％,(65.26 ± 2.34)％,(83.13 ± 1.78)％ vs.(49.22 ± 4.35)％],the proportion of S phase cell decreased gradually [(26.84 ± 2.30)％,(17.76 ± 3.90)％,(3.38 ± 0.65)％ vs.(29.21 ± 2.35)％],cell cycle showed G1 phase arrest,there was significant difference (P ＜ 0.05).Compared with control group and 0.2 mmol/L group,the proportion of G2 phase cell increased in pancreatic cancer cell line PaTu8988 in 1.0 and 5.0 mmol/L group [(26.80 ± 1.50)％,(36.58 ± 3.78)％ vs.(12.00 ± 4.62)％,(16.54 ± 2.26)％],cell cycleshowed G2 phase arrest,there was significant difference (P ＜ 0.05).Conclusion Sodium valproate mightsignificantly suppress the cell proliferation in hepatoma cell line SMMOL/LC-7721 and pancreatic cancercell line PaTu8988 and induce cell cycle arrest,it is clinically promising antitumor drug.

Objective To explore the expression of urothelial carcinoma-associated 1 ( UCA1 ) in pancreatic cancer cell lines and its influence on the invasion and metastasis of the pancreatic cancer cells .Methods The expression of UCA1 in pancreatic cancer tissues and paired adjacent normal tissues ( 11 cases ) and 5 pancreatic cancer cell lines was analyzed by real-time PCR.The level of UCA1 in BxPC-3 was knocked down by small interfering RNA . The ability of invasion and migration in vitro of transfected BxPC-3 was detected by Transwell invasion assay and wound healing assay .The protein levels of MMP-2 and MMP-9 were measured by Western blot experiment .Results The expression level of UCA1 in pancreatic cancer tissues was higher than that in paired adjacent normal tissues , and UCA1 differentially expressed in 5 pancreatic cancer cell lines .Down-regulation of UCA1 by siRNA suppressed the expression of MMP-2 and MMP-9 in BxPC3, and dramatically impaired the ability of invasion and migration of BxPC-3.Conclusions UCA1 is over-expressed in pancreatic cancer , and down-regulation of UCA1 attenuates the capacity of invasion and metastasis in vitro of BxPC-3 by decreasing MMP-2 and MMP-9.

Objective To explore the levels of serum alkaline phosphatase ( ALP) as well as its impact on the cognitive impairment in patients with subcortical ischemic vascular disease ( SIVD).Methods One hundred and fifty-eight SIVD patients were divided into two subgroups which included 86 patients with mild cognitive impairment ( SVMCI ) and 72 patients with vascular dementia ( SVaD ) according to the severity of cognitive impairment.Sixty-seven old people with normal cognitive function were selected as control qruop.Multiple lacunar infarction ( LI) or leukoaraiosis ( LA) was detected according to their MRI scan appearances and graded LA according to the severity.Serum ALP was measured by an enzymatic method as well as the Mini-Mental State Examination ( MMSE) and the Cambridge Cognitive Examination-Chinese Version (CAMCOG-C) were used in assessments.Serum ALP was divided into 3 groups and the occurrence rate of LI , LA and cognitive impairment were compared with each other.The levels of ALP were compared in different cognitive impairment and Logistic regression was used to explore the relation between ALP and cognitive impairment.Results Both SVaD and SVMCI groups (17.00 (13.00, 20.00), 59.50 (49.00, 68.75);25.00 (25.00, 26.00), 82.50 (76.75, 89.00)) showed significantly lower scores in MMSE and CAMCOG-C than control group (28.00 (28.00, 29.00), 93.00 (89.00, 96.00); Z=187.337, P=0.000; Z=150.480, P=0.000).A positive relationship between the elevated ALP level and the severity of cognitive impairment was found after adjusting for sex , age and other confunding factors ((68.60 ±15.52), (78.76 ±13.39), (86.75 ±18.85) U/L, F=22.587, P=0.000).The occurrence rate of LI, LA and SVaD among the three groups were significantly different (χ2 =8.008, P=0.018;χ2 =17.998, P=0.000;χ2 =12.255, P=0.002).The ALP level was negatively correlated with MMSE and CAMCOG-C scores ( r=-0.350, P=0.000; r=-0.286, P=0.000 ).Logistic regression analysis revealed the relation between ALP and cognitive impairment was positive when we controlled all the vascular risk factors.However , the relation had gone when futher adjusting for the grade of LA.Conclusions The level of ALP is significantly higher in SIVD patients and positively relates with cognitive impairment especially in those whose grade of LA is severe.

Objective To investigate the effect of miR-200 a mimic on transforming growth factor β1-mediated acti-vation and collagen secretion of rat pancreatic stellate cells .Methods PSCs were isolated and cultured from pan-creatic tissue and identified by desmin , GFAP and α-SMA immunofluorescence staining .PSCs of 2nd generation were divided into control group , TGF-β1 group, TGF-β1+miR-NC group and TGF-β1+miR-200a mimic group.α-SMA and collagen Ⅰ protein were measured by Western blot and immunofluorescence staining .The mRNA ofα-SMA and collagen Ⅰ and the expression of miR-200a were detected by quantitative real-time PCR.Results TGF-β1 stimulates the activation of PSCs and promote collagen synthesis in time-dependment manner ( P<0.05 ) . After transfection of the mimic , treating with the same concentration of TGF-β1, the expressions of protein and mR-NA of both α-SMA and collagen Ⅰ decreases significantly ( P<0.01 ) .Conclusions Over-expression of miR-200 a significantly attenuates α-SMA activity and further affects the collagen synthesis of TGF-β1-dependent activa-tion of PSCs.The mechanisms are potentially related to the biological effects of TGF-β1.