外泌体或可作为黑色素瘤诊断和预后的生物标志物

2016-01-21 佚名 艾兰博曼医学网

恶性黑色素瘤是一种侵略性肿瘤,其发病率越来越高。胞外体是一种主动分泌的微囊泡,它的特征反映其起源于何种细胞。近日发表在《临床化学学报》(Clinica Chimica Acta,CCA)的研究,西班牙科学家确定并评估了胞外体中黑色素瘤标志物的存在,包括MIA、S100B和酪氨酸酶相关蛋白2(Tyrp2)等,及胞外体中的这些标记物的潜在临床应用价值。 实验收集了黑色素瘤IV期患者、非黑色素瘤患者和

恶性黑色素瘤是一种侵略性肿瘤,其发病率越来越高。胞外体是一种主动分泌的微囊泡,它的特征反映其起源于何种细胞。近日发表在《临床化学学报》(Clinica Chimica Acta,CCA)的研究,西班牙科学家确定并评估了胞外体中黑色素瘤标志物的存在,包括MIA、S100B和酪氨酸酶相关蛋白2(Tyrp2)等,及胞外体中的这些标记物的潜在临床应用价值。

实验收集了黑色素瘤IV期患者、非黑色素瘤患者和健康对照人群的血清样品。沉淀获得胞外体;对血清、胞外体和无胞外体血清中的TYRP2、MIA和S100B的浓度进行定量。

结果显示,在胞外体中检测到了MIA和S100B,并与血清浓度呈显着相关(S100B: r = 0.968; MIA: r = 0.799; p < 0.001)。黑色素瘤患者胞外体中MIA和S100B浓度显着高于健康对照人群和非黑色素瘤患者。然而,三组人群血清胞外体中TYRP2的浓度没有差异。MIA的ROC曲线分析所得峰下面积(AUC)为0.833(p < 0.01),S100B为0.840(p < 0.01)。胞外体中MIA浓度高于2.5μg/L的患者的平均生存期比胞外体中MIA水平低的患者短(前者为4个月,后者为11个月,p < 0.05)。

该研究证实,在MIA和S100B黑色素瘤患者胞外体中检测到了MIA和S100B,对它们的量化具有诊断和预后的作用。

原始出处:

Circulating melanoma exosomes as diagnostic and prognosis biomarkers. Clinica Chimica Acta. Volume 454, 15 February 2016, Pages 28–32

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    2016-08-04 sunylz
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    2016-01-27 李继凯

    好文章

    0

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    2016-01-21 xiaotaiyang1

    外泌体火了

    0

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血液,你会想起什么?我们来看一下初中和高中课本里对血液是如何描述的: 掌握上述内容,估计是非专业人士对于血液成分了解的巅峰了,然而,就算是学霸,进了医院也是分分钟虐成渣。 因为医生眼里的血液是酱婶儿的: 或者这样婶儿 当然,这只是常规的入门项:全血和生化,还有很多专项检测可以招呼,想了解健康状况,你的血液可以把你出卖个底儿掉。不计成本的话,要不要来个全基因组的测序,你祖上哪

给我一口血,我给你算算!

(图片来自权力的游戏) “你的血。”当《权力的游戏》中皇后瑟曦要求女巫占卜她的命运时,女巫却要求尝一口她的血。 从古至今,无论是西方的格林童话,吸血鬼,还是中国英雄小说中的歃血为盟,人类血液总是充当着一种神圣的媒介,交流信息,甚至传递生命。 那一口血液里究竟包含着多少信息呢?当然啦,生物谷小编不是天桥下面摆摊的,掐指算不出你的前程富贵,但是能帮你获知你的身体状况,是疾病还是健康,甚至是

Nature:外泌体决定肿瘤转移的器官特异性

一项研究表明,肿瘤细胞通过释放外泌体,使受纳器官做好准备,形成转移灶。 癌细胞通过血液由起源部位传播扩散到远处器官是癌症相关死亡的主要原因。这个过程并不随机;相反,一些种类的癌症细胞会通过一系列分子程序,优先寻找特定器官,并在该处筑巢。这种寻找目的地的行为涉及到逃避原发肿瘤的癌细胞(有时也被称为“种子”)和目的器官处的微环境(或叫“土壤”)的互动。而Hoshino等人的研究发现,种子在到达之

Sci Rep:外泌体作为载体将siRNA运输至中枢,可能治疗吗啡成瘾

南京大学的张辰宇(Chen-Yu Zhang)主要从事microRNA、线粒体功能和人体及细胞能量代谢研究。近年来因发布了多项有关miRNA的惊人研究成果而广受关注。迄今已在包括Cell, Nature, Science及其子刊(~22篇)在内的国际学术期刊上发表论文约150余篇。

在这篇文章中,研究人员称他们利用定向外泌体(exosome)介导传递阿片受体Mu siRNA治疗了吗啡复吸。

RNA干扰(RNAi)是指通过降解靶RNA或是阻止其翻译来介导引导序列依赖性基因沉默的一种现象。发现在哺乳动物细胞中由小干扰RNA(siRNA)介导了RNAi,将RNAi快速推向了大众使之成为了实现癌症和其他疾病临床应用一个有前景的工具。然而直到现在传递siRNA仍然是一个具有挑战性的任务。当前有三种传送载体被用来传递siRNA,包括病毒、基于聚乙烯亚胺(PEI)的纳米粒子和脂质体,但每种方法都具有各自的一些缺点,包括免疫激活、毒性问题和非特异性靶向等。因此,需要开发出一种有效的、组织特异性和低免疫

2015年外泌体领域十大前沿进展

2015年,经济下行,科研经费总额缩减,科研圈里经过了“节衣缩食”的一年。虽然经费总额在缩减,但是新兴领域依旧方兴未艾,外泌体相关研究更是如火如荼,逐渐从小众走向大众,受到越来越多的关注,同时大量的商业圈人士也开始将目光投到外泌体领域,外泌体在临床诊断、治疗中的应用正在逐渐展开。2015年外泌体的突破进展囊括了外泌体性质、肿瘤、免疫、干细胞、心脑血管、损伤修复等多个领域。小编虽然才疏学浅,但还