目的建立唐氏综合征患者永生细胞系,为唐氏综合征的基因诊断提供标准品。方法采集唐氏综合征患者的外周血样品,采用 EB 病毒转化技术,把患者外周血 B 淋巴细胞转化成永生淋巴母细胞系;用细胞遗传学方法、实时荧光定量 PCR 及短串联重复...
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目的建立唐氏综合征患者永生细胞系,为唐氏综合征的基因诊断提供标准品。方法采集唐氏综合征患者的外周血样品,采用 EB 病毒转化技术,把患者外周血 B 淋巴细胞转化成永生淋巴母细胞系;用细胞遗传学方法、实时荧光定量 PCR 及短串联重复序列(STR)多态性分析技术检测其建系前后的遗传特性及稳定性。结果建系成功,建成的永生细胞系冻存后复苏成功,染色体核型和 DNA 分析表明建系前后遗传基因特点一致,且是稳定的。结论建立的唐氏综合征患者永生细胞系可用作唐氏综合征基因诊断试剂盒产品质检、质控的标准品。
Hyperhomocysteinemia is an independent risk factor for cardiovascular diseases. At present, the main therapeutic provision is to supply vitamin B 6, B 12 and folic acids, and the toxic and ill effect have been reporte...
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Hyperhomocysteinemia is an independent risk factor for cardiovascular diseases. At present, the main therapeutic provision is to supply vitamin B 6, B 12 and folic acids, and the toxic and ill effect have been reported. Homocysteine, taurine, hydrogen sulfide and metallothionein are metabolic products from methionine. Homocysteine induces necrosis of endothelium, proliferation of vascular smooth muscle cells, proliferation and activation of vascular fibroblast cells and mitochondrial structural destruction and dysfunction of myocardium cells. Taurine, an end metabolic product of homocysteine, obviously reduces cardiovascular injury induced by homocysteine. The possible mechanism of antagonism by reducing oxidative stress and endoplasmic reticulum stress has been proved. Hydrogen sulfide, another end metabolic product of homocysteine, obviously reducing cardiovascular injury of homocysteine by scavenging oxidative radicals has been found. Metallothionein a derivant production of homocysteine metabolism, antagonism to homocysteine injury to cardiovascular system been discussed. Homocysteine, taurine, hydrogen sulfide and metallothionein, as a metabolic product of methionine, interactive antagonism and interactive biological influence have been reviewed. Induced endogenous or exogenous supply of taurine, hydrogen sulfide and metallothionein might resist cardiovascular injury induced by hyperhomocysteinemia. According to the methionine metabolic cycle, using endogenous antagonistic substances might be a new clinical preventive and treatment target of homocystinemia.
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