Aim: To study effects of recombinant human growth hormone (rhGH) on growth hormone-insulin-like growth factor axis (GH-IGFs) of human gastric cancer cell in vivo in order to reveal part mechanism of growth effects of ...Aim: To study effects of recombinant human growth hormone (rhGH) on growth hormone-insulin-like growth factor axis (GH-IGFs) of human gastric cancer cell in vivo in order to reveal part mechanism of growth effects of rhGH on gastric cancer. Methods: Nude mice were randomly divided into control group, cisplatin (DDP) group, rhGH group and DDP + rhGH group after human gastric cancer xenograft model of node mice was successfully founded and drugs were used for 6 days. We investigated volume of tumor, inhibitory rate of tumor and cell cycle by slide gauge and flow cytometry. In addition, We also respectively investigated insulin-like growth factor-I (IGF-I) and insulin-like growth factor binding protein-3 (IGFBP-3) of blood serum of nude mice, IGF-ImRNA, insulin-like growth factor-I receptor (IGF-IR) mRNA and IGFBP-3 mRNA of xenograft of nude mice by enzyme linked immunosorbent assay (ELISA) and semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR) on the first day of completing use of drugs later. Results: Tumor grew obviously slowly and tumor inhibitory rate obviously rose in DDP group and DDP + rhGH group compared with control group and rhGH group (p p p < 0.05). Expressions of IGF-I mRNA and IGF-IR mRNA were not obviously different in all groups. But expression of IGFBP-3 mRNA obviously increased in rhGH group, DDP group and DDP + rhGH group compared with control group;meanwhile, expression of IGFBP-3 mRNA also obviously increased in DDP + rhGH group compared with control group, DDP group and rhGH group. Conclusion: Our results indicated rhGH in short-time use did not improve proliferation of human gastric cancer cells and its mechanism was possible that rhGH in short-time use raised simultaneously IGF-I and IGFBP-3 of blood serum and increased IGFBP-3 mRNA, but degraded ratio of IGF-I and IGFBP-3 of blood serum in human gastric cancer cells.展开更多
目的:探讨磷脂酰肌醇3激酶抑制剂LY294002对人胚胎干细胞定向分化为成熟胰岛素分泌细胞的影响。方法:体外通过5个阶段诱导人胚胎干细胞定向分化为胰岛素分泌细胞。分别给予尼克酰胺+B27(B27组)为对照组和尼克酰胺+LY294002(LY组)为实验...目的:探讨磷脂酰肌醇3激酶抑制剂LY294002对人胚胎干细胞定向分化为成熟胰岛素分泌细胞的影响。方法:体外通过5个阶段诱导人胚胎干细胞定向分化为胰岛素分泌细胞。分别给予尼克酰胺+B27(B27组)为对照组和尼克酰胺+LY294002(LY组)为实验组诱导胰岛素分泌细胞的成熟。显微镜下观察各阶段细胞形态变化,免疫荧光染色鉴定胰岛素、c-肽、生长抑素和胰高血糖素的表达。结果:第5阶段诱导14 d LY组胰岛素单染阳性率与B27组无统计学差别(P﹥0.05),但生长抑素和胰高血糖素单染阳性率,胰岛素/生长抑素共染率均低于B27组(P﹤0.05)。结论:在无血清培养体系下,磷脂酰肌醇3激酶抑制剂LY294002能够诱导人胚胎干细胞分化为更加成熟的胰岛素分泌细胞。展开更多
目的:分析肝癌患者血清胰岛素样生长因子ⅡmRNA结合蛋白3(insulin-like growth factorⅡmRNA binding protein 3,IMP3)水平,并揭示其用于肝癌早期诊断和评价肝癌进展的临床价值.方法:选择2011-12/2013-11确诊为肝癌的患者120例为观察组...目的:分析肝癌患者血清胰岛素样生长因子ⅡmRNA结合蛋白3(insulin-like growth factorⅡmRNA binding protein 3,IMP3)水平,并揭示其用于肝癌早期诊断和评价肝癌进展的临床价值.方法:选择2011-12/2013-11确诊为肝癌的患者120例为观察组,同时纳入30例健康志愿者作为对照组.按照肝癌的严重程度将观察组分成Ⅰ期、Ⅱ期和Ⅲ期.采用RT-PCR检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组IMP3的mRNA转录量,使用ELISA检测方法检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组患者血清IMP3浓度.结果:Ⅰ期组IMP3 mRNA转录量显著高于对照组(t=19.72,P=0.000),Ⅱ期组IMP3mRNA转录量显著高于Ⅰ期组(t=9.67,P=0.000),Ⅲ期组I M P3 m R N A转录量显著高于Ⅱ期组(t=23.34,P=0.000).观察组血清IMP3平均浓度为134.25 ng/mL±19.33 ng/mL,显著高于对照组(9.37 ng/mL±1.23 ng/mL)(t=70.22,P=0.000).Ⅰ期组血清IMP3平均浓度为48.35 ng/mL±12.03 ng/mL,显著高于对照组(t=19.84,P=0.000).Ⅱ期组血清IMP3平均浓度为95.36 ng/mL±9.25 ng/mL,显著高于Ⅰ期组(t=19.67,P=0.000).Ⅲ期组血清IMP3平均浓度为214.23 ng/mL±23.64 ng/mL,显著高于Ⅱ期组(t=28.83,P=0.000).结论:随着肝癌的进展血清IMP3浓度显著上升,血清IMP3检测具有肝癌早期诊断和肝癌进展评价的潜在价值.展开更多
文摘Aim: To study effects of recombinant human growth hormone (rhGH) on growth hormone-insulin-like growth factor axis (GH-IGFs) of human gastric cancer cell in vivo in order to reveal part mechanism of growth effects of rhGH on gastric cancer. Methods: Nude mice were randomly divided into control group, cisplatin (DDP) group, rhGH group and DDP + rhGH group after human gastric cancer xenograft model of node mice was successfully founded and drugs were used for 6 days. We investigated volume of tumor, inhibitory rate of tumor and cell cycle by slide gauge and flow cytometry. In addition, We also respectively investigated insulin-like growth factor-I (IGF-I) and insulin-like growth factor binding protein-3 (IGFBP-3) of blood serum of nude mice, IGF-ImRNA, insulin-like growth factor-I receptor (IGF-IR) mRNA and IGFBP-3 mRNA of xenograft of nude mice by enzyme linked immunosorbent assay (ELISA) and semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR) on the first day of completing use of drugs later. Results: Tumor grew obviously slowly and tumor inhibitory rate obviously rose in DDP group and DDP + rhGH group compared with control group and rhGH group (p p p < 0.05). Expressions of IGF-I mRNA and IGF-IR mRNA were not obviously different in all groups. But expression of IGFBP-3 mRNA obviously increased in rhGH group, DDP group and DDP + rhGH group compared with control group;meanwhile, expression of IGFBP-3 mRNA also obviously increased in DDP + rhGH group compared with control group, DDP group and rhGH group. Conclusion: Our results indicated rhGH in short-time use did not improve proliferation of human gastric cancer cells and its mechanism was possible that rhGH in short-time use raised simultaneously IGF-I and IGFBP-3 of blood serum and increased IGFBP-3 mRNA, but degraded ratio of IGF-I and IGFBP-3 of blood serum in human gastric cancer cells.
文摘目的:探讨磷脂酰肌醇3激酶抑制剂LY294002对人胚胎干细胞定向分化为成熟胰岛素分泌细胞的影响。方法:体外通过5个阶段诱导人胚胎干细胞定向分化为胰岛素分泌细胞。分别给予尼克酰胺+B27(B27组)为对照组和尼克酰胺+LY294002(LY组)为实验组诱导胰岛素分泌细胞的成熟。显微镜下观察各阶段细胞形态变化,免疫荧光染色鉴定胰岛素、c-肽、生长抑素和胰高血糖素的表达。结果:第5阶段诱导14 d LY组胰岛素单染阳性率与B27组无统计学差别(P﹥0.05),但生长抑素和胰高血糖素单染阳性率,胰岛素/生长抑素共染率均低于B27组(P﹤0.05)。结论:在无血清培养体系下,磷脂酰肌醇3激酶抑制剂LY294002能够诱导人胚胎干细胞分化为更加成熟的胰岛素分泌细胞。
文摘目的:分析肝癌患者血清胰岛素样生长因子ⅡmRNA结合蛋白3(insulin-like growth factorⅡmRNA binding protein 3,IMP3)水平,并揭示其用于肝癌早期诊断和评价肝癌进展的临床价值.方法:选择2011-12/2013-11确诊为肝癌的患者120例为观察组,同时纳入30例健康志愿者作为对照组.按照肝癌的严重程度将观察组分成Ⅰ期、Ⅱ期和Ⅲ期.采用RT-PCR检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组IMP3的mRNA转录量,使用ELISA检测方法检测观察组、对照组、Ⅰ期、Ⅱ期和Ⅲ期组患者血清IMP3浓度.结果:Ⅰ期组IMP3 mRNA转录量显著高于对照组(t=19.72,P=0.000),Ⅱ期组IMP3mRNA转录量显著高于Ⅰ期组(t=9.67,P=0.000),Ⅲ期组I M P3 m R N A转录量显著高于Ⅱ期组(t=23.34,P=0.000).观察组血清IMP3平均浓度为134.25 ng/mL±19.33 ng/mL,显著高于对照组(9.37 ng/mL±1.23 ng/mL)(t=70.22,P=0.000).Ⅰ期组血清IMP3平均浓度为48.35 ng/mL±12.03 ng/mL,显著高于对照组(t=19.84,P=0.000).Ⅱ期组血清IMP3平均浓度为95.36 ng/mL±9.25 ng/mL,显著高于Ⅰ期组(t=19.67,P=0.000).Ⅲ期组血清IMP3平均浓度为214.23 ng/mL±23.64 ng/mL,显著高于Ⅱ期组(t=28.83,P=0.000).结论:随着肝癌的进展血清IMP3浓度显著上升,血清IMP3检测具有肝癌早期诊断和肝癌进展评价的潜在价值.
