AIM： To investigate the implication of angiogenin （ANG） in the neovascularizaton and growth of human gastric carcinoma （HGC）. METHODS： ANG mRNA expression in HGC specimens obtained by surgical resection from pat...AIM： To investigate the implication of angiogenin （ANG） in the neovascularizaton and growth of human gastric carcinoma （HGC）. METHODS： ANG mRNA expression in HGC specimens obtained by surgical resection from patients with HGC were examined by RT-PCR. ANG, Ki-67, VEGF protein expression and microvessel density （MVD） in HGC specimens were detected by immunohistochemistry. RESULTS： RT-PCR showed significantly higher ANG mRNA expression （0.482 ± 0.094） in HGC tissues than in the surrounding nontumorous tissues （0.276 ±0.019, P = 0.03）. MVD within tumorous tissues increased significantly with ANG mRNA expression （r = 0.380, P = 0.001） and ANG protein expression （P 〈 0.01）. The ANG expression levels of cancer tissues were positively correlated with VEGF （P 〈 0.01） and the proliferation index of cancer cells （P 〈 0.01）. CONCLUSION： ANG is one of the neovascularization factors of HGC. ANG may work in coordination with VEGF, and promote the proliferation of HGC cells.展开更多
Angiogenin is associated with the pathogenesis of diabetic peripheral neuropathy. Here, we se- quenced the coding region of the angiogenin gene in genomic DNA from 207 patients with type 2 diabetes mellitus （129 diab...Angiogenin is associated with the pathogenesis of diabetic peripheral neuropathy. Here, we se- quenced the coding region of the angiogenin gene in genomic DNA from 207 patients with type 2 diabetes mellitus （129 diabetic peripheral neuropathy patients and 78 diabetic non-neuropathy pa- tients） and 268 healthy controls. All subjects were from the Han population of northern China. No mutations were found. We then compared the genotype and allele frequencies of the angiogenin synonymous single nucleotide polymorphism rs11701 between the diabetic peripheral neuropathy patients and controls, and between the diabetic neuropathy and non-neuropathy patients, using a case-control design. We detected no statistically significant genetic associations. Angiogenin may not be associated with genetic susceptibility to diabetic peripheral neuropathy in the Han population of northern China.展开更多
Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. Basic fibroblast growth factor (bFGF), which is highly expressed in developing tissues and malignant cells, regulates cell growth, differenti...Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. Basic fibroblast growth factor (bFGF), which is highly expressed in developing tissues and malignant cells, regulates cell growth, differentiation, and migration. Its expression is essential for the progression and metastasis of HCC. This study aims to investigate the effects of bFGF on the expression of angiogenin, another growth factor, which plays an important role in tumor angiogenesis, and on cell proliferation in H7402 human hepatoma cells. The bFGF sense cDNA or antisense cDNA was stably transfected into H7402 cells. Genomic DNA PCR analysis demonstrated that human bFGF sense cDNA or antisense cDNA was inserted into the genome. Furthermore, the expression of bFGF and angiogenin was examined by RT-PCR and Western blot assays. MTT and colony formation assays were employed to determine cell proliferation. Stable bFGF over-expressing and under-expressing transfectants were successfully established. Expression of angiogenin was decreased in the over-expressing bFGF cells (sense transfectants) and was increased in the under-expressing bFGF cells (antisense transfectants). Cell proliferation increased in the bFGF sense transfectants and decreased in the bFGF antisense transfectants. These results demonstrated that the endogenous bFGF may not only negatively regulate the angiogenin expression but also contribute to the overall cell proliferation in H7402 human hepatoma cells. This study may be helpful in finding a potential therapeutic approach to HCC.展开更多
The specific interaction between angiogenin and aptamer has been investigated by using AFM. The specificity of the interaction is revealed by comparing the binding probability of aptamer to other ele- ments in a serie...The specific interaction between angiogenin and aptamer has been investigated by using AFM. The specificity of the interaction is revealed by comparing the binding probability of aptamer to other ele- ments in a series of control experiments. The results have shown that there is specific interaction force between angiogenin and aptamer. Moreover, the single molecular pull-off force between angiogenin and aptamer has also been determined using the Poisson statistical method to be 133.7±11.7 pN. These findings obtained are helpful to the better revelation of recognition mechanism between angiogenin and aptamer, which provided basis for further understanding the inhibition of the aptamer to angio- genic activity.展开更多
目的:基于尿蛋白组学技术,筛选IgA肾病(IgAN)患者表达差异的蛋白,为探索IgAN发病机制和发现潜在生物标志物提供新的线索。方法:分析IgAN、膜性肾病及健康对照者的尿液蛋白组学数据。将膜性肾病患者和健康者作为对照,筛选出IgAN中差异表...目的:基于尿蛋白组学技术,筛选IgA肾病(IgAN)患者表达差异的蛋白,为探索IgAN发病机制和发现潜在生物标志物提供新的线索。方法:分析IgAN、膜性肾病及健康对照者的尿液蛋白组学数据。将膜性肾病患者和健康者作为对照,筛选出IgAN中差异表达的蛋白。筛选出蛋白Plexin-B2与临床病理指标进行相关性分析。采用酶联免疫吸附试验(ELISA)对血、尿中Plexin-B2及其配体血管生成素(ANG)表达情况进行检测验证并采用免疫组化检测其在肾脏的表达。结果:与健康对照组相比,质谱法检测的IgAN患者尿液Plexin-B2(uPlexin-B2)表达明显增加,且与总胆固醇(r=0.34,P=0.02)及低密度脂蛋白(r=0.43,P=0.01)呈正相关。uPlexin-B2与节段性肾小球硬化(r=-0.28,P=0.04)呈负相关。ELISA发现IgAN患者uPlexin-B2有升高的趋势。IgAN患者血Ang表达水平明显高于健康对照组(61.97 vs 6.30,P<0.001)。血ANG与肾毛细血管内增殖呈负相关(r=-0.40,P=0.04),与节段性硬化个数呈负相关(r=-0.44,P=0.04)。uPlexin-B2与肾脏球性硬化个数呈负相关(r=-0.95,P=0.01)。Plexin-B2及ANG均在IgAN患者肾小管中高表达。结论:IgAN患者uPlexin-B2升高。Plexin-B2及ANG与IgAN中肾小球硬化显著相关。ANG在IgAN患者血液中明显升高。本研究可能为发现IgAN的潜在生物标志物提供线索,为探索肾脏病理发病机制提供新思路。展开更多
基金Supported by the Natural Science Foundation of Fujian Province,No.C0110013Science and Technology KeyProgram Foundation of Fujian Province, No. 2002Y003
文摘AIM： To investigate the implication of angiogenin （ANG） in the neovascularizaton and growth of human gastric carcinoma （HGC）. METHODS： ANG mRNA expression in HGC specimens obtained by surgical resection from patients with HGC were examined by RT-PCR. ANG, Ki-67, VEGF protein expression and microvessel density （MVD） in HGC specimens were detected by immunohistochemistry. RESULTS： RT-PCR showed significantly higher ANG mRNA expression （0.482 ± 0.094） in HGC tissues than in the surrounding nontumorous tissues （0.276 ±0.019, P = 0.03）. MVD within tumorous tissues increased significantly with ANG mRNA expression （r = 0.380, P = 0.001） and ANG protein expression （P 〈 0.01）. The ANG expression levels of cancer tissues were positively correlated with VEGF （P 〈 0.01） and the proliferation index of cancer cells （P 〈 0.01）. CONCLUSION： ANG is one of the neovascularization factors of HGC. ANG may work in coordination with VEGF, and promote the proliferation of HGC cells.
基金financially sponsored by the Natural Science Foundation of Beijing,No.7102161
文摘Angiogenin is associated with the pathogenesis of diabetic peripheral neuropathy. Here, we se- quenced the coding region of the angiogenin gene in genomic DNA from 207 patients with type 2 diabetes mellitus （129 diabetic peripheral neuropathy patients and 78 diabetic non-neuropathy pa- tients） and 268 healthy controls. All subjects were from the Han population of northern China. No mutations were found. We then compared the genotype and allele frequencies of the angiogenin synonymous single nucleotide polymorphism rs11701 between the diabetic peripheral neuropathy patients and controls, and between the diabetic neuropathy and non-neuropathy patients, using a case-control design. We detected no statistically significant genetic associations. Angiogenin may not be associated with genetic susceptibility to diabetic peripheral neuropathy in the Han population of northern China.
基金supported by a grant (No. 20060923-02) from the Department of Science and Technology of Jilin Province, China
文摘Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. Basic fibroblast growth factor (bFGF), which is highly expressed in developing tissues and malignant cells, regulates cell growth, differentiation, and migration. Its expression is essential for the progression and metastasis of HCC. This study aims to investigate the effects of bFGF on the expression of angiogenin, another growth factor, which plays an important role in tumor angiogenesis, and on cell proliferation in H7402 human hepatoma cells. The bFGF sense cDNA or antisense cDNA was stably transfected into H7402 cells. Genomic DNA PCR analysis demonstrated that human bFGF sense cDNA or antisense cDNA was inserted into the genome. Furthermore, the expression of bFGF and angiogenin was examined by RT-PCR and Western blot assays. MTT and colony formation assays were employed to determine cell proliferation. Stable bFGF over-expressing and under-expressing transfectants were successfully established. Expression of angiogenin was decreased in the over-expressing bFGF cells (sense transfectants) and was increased in the under-expressing bFGF cells (antisense transfectants). Cell proliferation increased in the bFGF sense transfectants and decreased in the bFGF antisense transfectants. These results demonstrated that the endogenous bFGF may not only negatively regulate the angiogenin expression but also contribute to the overall cell proliferation in H7402 human hepatoma cells. This study may be helpful in finding a potential therapeutic approach to HCC.
基金the National Key Basic Research Program (Grant No. 2002CB513100-10)Key Technologies Research and Development Program (Grant No. 2003BA310A16)+3 种基金Key Project Foundation of China Education Ministry (Grant No. 107084)Program for New Century Excellent Talents in University (Grant No. NCET-06-0697)National Natural Science Foundation of China (Nos. 90606003 and 20405005)Outstanding Youth Foundation of Hunan Province (Grant No. 06JJ10004)
文摘The specific interaction between angiogenin and aptamer has been investigated by using AFM. The specificity of the interaction is revealed by comparing the binding probability of aptamer to other ele- ments in a series of control experiments. The results have shown that there is specific interaction force between angiogenin and aptamer. Moreover, the single molecular pull-off force between angiogenin and aptamer has also been determined using the Poisson statistical method to be 133.7±11.7 pN. These findings obtained are helpful to the better revelation of recognition mechanism between angiogenin and aptamer, which provided basis for further understanding the inhibition of the aptamer to angio- genic activity.
文摘目的:基于尿蛋白组学技术,筛选IgA肾病(IgAN)患者表达差异的蛋白,为探索IgAN发病机制和发现潜在生物标志物提供新的线索。方法:分析IgAN、膜性肾病及健康对照者的尿液蛋白组学数据。将膜性肾病患者和健康者作为对照,筛选出IgAN中差异表达的蛋白。筛选出蛋白Plexin-B2与临床病理指标进行相关性分析。采用酶联免疫吸附试验(ELISA)对血、尿中Plexin-B2及其配体血管生成素(ANG)表达情况进行检测验证并采用免疫组化检测其在肾脏的表达。结果:与健康对照组相比,质谱法检测的IgAN患者尿液Plexin-B2(uPlexin-B2)表达明显增加,且与总胆固醇(r=0.34,P=0.02)及低密度脂蛋白(r=0.43,P=0.01)呈正相关。uPlexin-B2与节段性肾小球硬化(r=-0.28,P=0.04)呈负相关。ELISA发现IgAN患者uPlexin-B2有升高的趋势。IgAN患者血Ang表达水平明显高于健康对照组(61.97 vs 6.30,P<0.001)。血ANG与肾毛细血管内增殖呈负相关(r=-0.40,P=0.04),与节段性硬化个数呈负相关(r=-0.44,P=0.04)。uPlexin-B2与肾脏球性硬化个数呈负相关(r=-0.95,P=0.01)。Plexin-B2及ANG均在IgAN患者肾小管中高表达。结论:IgAN患者uPlexin-B2升高。Plexin-B2及ANG与IgAN中肾小球硬化显著相关。ANG在IgAN患者血液中明显升高。本研究可能为发现IgAN的潜在生物标志物提供线索,为探索肾脏病理发病机制提供新思路。
