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Objective@#To study the effects of liraglutide on bone metabolism and Wnt pathway in type 2 diabetic osteoporosis rats.@*Methods@#SD rats were randomly divided into control group, model group and liraglutide group. The latter two groups were fed with high-fat and high-sugar diet and intraperitoneally injected with low-dose streptozotocin to establish type 2 diabetic model. Liraglutide group was subcutaneously injected with 0.6 mg/kg/d liraglutide for 8 weeks. Bone mineral density, calcium and phosphorus content, the expression of Wnt pathway molecule [Wnt3a, low density lipoprotein receptor-related protein 5 (LRP5) , β-catenin] and the contents of bone metabolism indicators [ALP, osteocalcin (OC) , osteoprotegerin (OPG) , receptor activator of nuclear factor-κ B ligand (RANKL) , tartrate-resistant acid phosphatase (TrACP) , cross-linked carboxy-terminal telopeptide of type I collagen (CTX-1) ] in serum were determined.@*Results@#The tibial bone mineral density[left (0.158±0.024) vs (0.232±0.041) g/cm2, right (0.152±0.027) vs (0.219±0.038) g/cm2, P<0.05) , the content of calcium and phosphorus [ (5.12±0.58) vs (5.93±0.74) mol/g, (2.93±0.41) vs (3.84±0.56) mol/g, P<0.05) , the expression of Wnt3a, LRP5, β-catenin in tibia [ (0.29±0.06) vs (0.78±0.13) , (0.30±0.05) vs (0.73±0.14) , (0.38±0.06) vs (1.01±0.18) , P<0.05], the content of ALP, OC and OPG in serum of model group were significantly lower than those of control group[ (40.27±7.52) vs (59.29±9.19) ng/ml, (252.45±42.95) vs (341.28±52.39) pg/ml, (0.40±0.06) vs (0.78±0.09) ng/ml, P<0.05) , and the contents of RANKL, TrACP and CTX-1 in serum were significantly higher than those of control group [ (17.79±2.84) vs (12.46±2.09) pg/ml, (56.45±7.79) vs (41.38±8.19) μmol/l, (19.26±3.14) vs (11.39±2.25) pg/ml, P<0.05]; the tibial bone mineral density, the content of calcium and phosphorus, the expression of Wnt3a, LRP5, β-catenin in tibia, the content of ALP, OC and OPG in serum of liraglutide group were significantly higher than those of control group, and the contents of RANKL, TrACP and CTX-1 in serum were significantly lower than those of control group.@*Conclusion@#Liraglutide can improve bone mineral density and bone metabolism in type 2 diabetic rats with osteoporosis, which may be related to activation of Wnt pathway.
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Objective To study the effects of liraglutide on bone metabolism and Wnt pathway in type 2 diabetic osteoporosis rats. Methods SD rats were randomly divided into control group, model group and liraglu-tide group. The latter two groups were fed with high-fat and high-sugar diet and intraperitoneally injected with low-dose streptozotocin to establish type 2 diabetic model. Liraglutide group was subcutaneously injected with 0.6 mg/kg/d liraglutide for 8 weeks. Bone mineral density, calcium and phosphorus content, the expression of Wnt path-way molecule [Wnt3a, low density lipoprotein receptor-related protein 5 (LRP5), β-catenin] and the contents of bone metabolism indicators [ALP, osteocalcin(OC), osteoprotegerin(OPG), receptor activator of nuclear factor-κ B ligand(RANKL), tartrate-resistant acid phosphatase(TrACP), cross-linked carboxy-terminal telopeptide of type I collagen (CTX-1)] in serum were determined. Results The tibial bone mineral density [left (0.158±0.024) vs (0.232±0.041) g/cm2, right(0.152±0.027) vs(0.219±0.038) g/cm2, P<0.05), the content of calcium and phospho-rus [(5.12±0.58) vs (5.93±0.74) mol/g, (2.93±0.41) vs (3.84±0.56) mol/g, P<0.05), the expression of Wnt3a, LRP5, β-catenin in tibia [(0.29±0.06) vs (0.78±0.13), (0.30±0.05) vs (0.73±0.14), (0.38±0.06) vs (1.01± 0.18), P<0.05], the content of ALP, OC and OPG in serum of model group were significantly lower than those of control group [(40.27±7.52) vs (59.29±9.19) ng/ml, (252.45±42.95) vs (341.28±52.39) pg/ml, (0.40±0.06) vs (0.78±0.09) ng/ml, P<0.05), and the contents of RANKL, TrACP and CTX-1 in serum were significantly higher than those of control group [(17.79±2.84) vs(12.46±2.09) pg/ml, (56.45±7.79) vs (41.38±8.19)μmol/l, (19.26± 3.14) vs (11.39±2.25) pg/ml, P<0.05]; the tibial bone mineral density, the content of calcium and phosphorus, the expression of Wnt3a, LRP5, β-catenin in tibia, the content of ALP, OC and OPG in serum of liraglutide group were significantly higher than those of control group, and the contents of RANKL, TrACP and CTX-1 in serum were significantly lower than those of control group. Conclusion Liraglutide can improve bone mineral density and bone metabolism in type 2 diabetic rats with osteoporosis, which may be related to activation of Wnt pathway.
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Objective To evaluate the diagnostic value of 320-row dynamic volume computed tomgoraphy angiography (CTA)in mesenteric ischemia disease (MID).Methods Clinical data and 320-row dynamic volume CTA images of 44 patients with MID confirmed by digital subtraction angiography (DSA)and surgery were analyzed retrospectively.The results of 320-row dynamic volume CTA were compared with DSA and surgical results.Results All 44 patients were diagnosed as MID with 320-row dynamic volume CTA,with a diagnosis rate of 100%.Among them,32 cases were of acute mesenteric ischemia (AMI),and 12 cases were those of chronic mesenteric ischemia (CMI)disease.According to DSA and surgical results,28 patients were diagnosed with AMI and 16 patients with CMI,with a sensitivity of 320-row dynamic volume CTA to direct and indirect sign AMI being 100%,and the specificity being 81.2%.Among them,thickening of the intestinal wall,expansion of the intestinal tube and lack of the strengthening of the intestinal wall were the most common sings of AMI (sensitivity 53.57%-71.43%,specificity 75.00%).Thinning of the intestinal wall and the intestinal wall pneumatosis were late sings of small intestine necrosis in the late stage of AMI (sensitivity 14.28%-21.43%,specificity 100%).Conclusion 320-row dynamic volume CTA is a fast,effective and noninvasive imaging method for the diagnosis of MID.It can also display the secondary lesions of the abdominal viscera in addition to the direct display of vascular lesions.
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@#To determine the contents of p-coumaric acid and ferulic acid in Rhizama Phragmitis by HPLC for quality evaluation. Rhizama Phragmitis alkaline alcoholic solution exact of p-coumaric acid and ferulic acid was refluxed. An HPLC method was developed by using a Diamonsil C18(4. 6 mm×250 mm, 5 μm)column, and the mobile phase of acetonitrile and 0. 3% acetic acid with linear gradient elution at a flow of 1. 0 mL/min and UV detection at 310 nm. Calibration curvers of p-coumaric acid and ferulic acid were linear over the range of 0. 2-200 μg/mL and 0. 1-120 μg/mL respectively. . Average recoveries were(96. 9±2. 91)% and(98. 7±1. 78)%, respectively. The average contents of p-coumaric acid and ferulic acid expressed as mean±sd(max-min)were(0. 88±0. 16)%(1. 21%-0. 70%)and(0. 41±0. 035)%(0. 49%-0. 36%)in 15 batches of Rhizama Phragmitis. The established method will be beneficial to the quality evaluation of Rhizama Phragmitis.
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Objective To investigate the radiosensitizing effects of artemisinin on CNE human nasopharyngeal carcinoma cells in vitro.Methods CNE human nasopharyngeal carcinoma cell line was used in this study.Cell growth kinetics was determined by MTT assay.Effect of the drug on radiosensitivity of CNE cells was analyzed by clonogenic assay.The change of cell cycle was measured by flow cytometry.Results The inhibition of CNE cells growth by artemisinin was increased with concentrations.Artemisinin (1 μmol/L)could enhance the radiosensitizing effects on CNE cell line,and the sensitizing enhancement ratio(SER)was 1.26.Artemisinin abrogated radiation-induced G2/M arrest of the tested CNE cells.Compared with the radiation alone group,the proportion of G2/M phase cells increased in radiation combined with drug group.Conclusions Artemisinin could reduce radiation-induced G2/M arrest and enhance the cytotoxicity of γ-irradiation on the CNE ceils.
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Objective To investigate the radiosensitizing effects of artesunate on human HeLa cells of cervical cancer in vitro.Methods Hela cells were irradiated with 60Co γ-rays.The dose rate was 0.635 Gy/min and the radiation dose was 0,1,2,4,6 Gy,respectively.The anti-proliferation activities of artesunate on HeLa cells were evaluated with MTT assay,to determine the most appropriate drug concentration.The effect of radiosensitivity was observed by using clonogenic assay.The single-hit multitarget model was used to plot the HeLa cell's dose-survival curve,to calculate mean lethal dose,quasithreshold dose and sensitization enhancement rate,and to evaluate its radiosensitization effect.The apoptosis was analyzed with flow cytometry (FCM) to further test the radiation senseitization of artesunate on HeLa cells.Results The inhibition of artesunate on HeLa cells increased with concentration.In radiation group,the cell cloning efficiency were 91.67% ,82.02% ,58.60% ,25.01%,respectively,and in artesunate (2.0 μ mol/L) + radiation group,the cell cloning efficiency were 74.93% ,60.53% ,22.38% ,5.05%.In radiation group and artesunate (2.0 μmol/L) + radiation group,the mean lethal dose(D0) was 2.95 and 2.07 Gy,respectively,while the qusai-threshold dose (Dq) were 2.01 and 1.24 Gy,respectively,and SER was 1.43.Compared with 2 and 6 Gy radiation group,the apoptosis rate of drug + radiation group increased from 12.26% ,40.08% to 22.71% ,59.92%.Conclusions The inhibiting effect of artesunate on HeLa cells is concentration-dependent.Artesunate has radiosensitizing effect on HeLa cells in vitro.
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Objective To investigate the radiosensitizing effects of dihydroartemisinin(DHA)on human HeLa cells of cervical cancer irradiated by X rays.Methods Cell growth kinetics was determined using MTF assay.Cell survival was analyzed by elonogenic assay.The change of cell cycle and apeptosis was measured by flow cytometry.Results Dihydroartemisinin inhibited the growth of HeLa cells of human cervical cancer and showed a dose-dependent and time-dependent manner.Dihydroartemisinin(20 μmol/L)showed the radiosensitizing effects on HeLa cells,and the sensitizing enhancement ratio(SER)was 1.47.Dihydroartemisinin abrogated radiation-induced G2 arrest of the tested HeLa cells,the G2 ratio of medicine + radiation group dechned from 73.58% to 48.31%.Dihydroartemisinin enhanced the apoptosis of HeLa cells by X-irradiation,the apoptosis rates of medicine + radiation group significantly increased from 29.46%,48.04%,70.21% to 45.79%,66.36% and 79.58%,respectively for 2,4 and 6 Gy.Conclusions Dihydroartemisinin could increase the radiesensitivity of HeLa cells of human cervical cancer.Abrogation of radiation-induced C2 arrest could be part of the mechanism.
