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PNAS:卵巢癌早期诊断治疗新标记

2015-05-28 佚名 生物谷

众所周知,卵巢恶性肿瘤是女性生殖器官常见的恶性肿瘤之一,发病率仅次于子宫颈癌和子宫体癌而列居第三位。但卵巢上皮癌死亡率却占各类妇科肿瘤的首位,对妇女生命造成严重威胁。由于卵巢的胚胎发育、组织解剖及内分泌功能较复杂,早期症状不典型,卵巢癌的术前诊断相当困难。 最近,来自美国加州大学圣地亚哥分校的研究人员进行了一项研究,他们发现卵巢癌细胞能够编码6个mRNA亚型,这些mRNA在正常细胞中并不存在

众所周知,卵巢恶性肿瘤是女性生殖器官常见的恶性肿瘤之一,发病率仅次于子宫颈癌和子宫体癌而列居第三位。但卵巢上皮癌死亡率却占各类妇科肿瘤的首位,对妇女生命造成严重威胁。由于卵巢的胚胎发育、组织解剖及内分泌功能较复杂,早期症状不典型,卵巢癌的术前诊断相当困难。

最近,来自美国加州大学圣地亚哥分校的研究人员进行了一项研究,他们发现卵巢癌细胞能够编码6个mRNA亚型,这些mRNA在正常细胞中并不存在,这为卵巢癌的早期诊断和治疗提供了新的契机。这项研究结果即将发表在国际学术期刊PNAS上。
 
研究人员指出,DNA携带了生命所必需的各种指令,但DNA不仅包括能够编码蛋白质的基因,还有许多非编码的DNA序列,与此相比,mRNA只是蛋白编码基因的互补序列,它们携带了编码细胞内每个蛋白质的"秘诀"。一个癌细胞可能具有一个或几个DNA突变拷贝,但其编码的mRNA可以达到几百上千个拷贝,因此,相比于DNA,利用mRNA进行癌症诊断具有绝对数量的优势。
 
在该项研究中,研究人员利用生物信息学方法,对NIH的两个公共数据库的DNA和RNA序列进行了分析,将296名卵巢癌病人组织和1839名正常人卵巢组织进行对比之后发现了6个在卵巢癌细胞中特异性表达的mRNA亚型。随后他们又用实时定量PCR的方法在卵巢癌细胞系中进行了这些mRNA的鉴定,证实了他们的生物信息学分析结果。除此之外,研究人员指出,其中一些mRNA不仅具有诊断标记功能,其编码的蛋白质还可用于卵巢癌的靶向治疗。
 
综上所述,研究人员从卵巢癌病人组织中发现6个特异性表达的mRNA亚型,对于卵巢癌早期诊断和治疗具有重要意义。

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    2015-12-27 忠诚向上

    认真的知识

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    2015-08-13 drwjr
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    2015-05-31 huaxipanxing

    看看

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