Mutat Res:突变特征能够有效识别具有相似体细胞突变谱的不同突变过程。

2017-09-26 MedSci MedSci原创

与传统光谱分析突变相比,破译突变特征可以对癌症在发生过程中产生体细胞突变的生物过程有更好的分辨能力。

与传统光谱分析突变相比,破译突变特征可以对癌症在发生过程中产生体细胞突变的生物过程有更好的分辨能力。以往对膀胱尿路上皮癌(BLCA)和宫颈鳞状细胞癌(CESC)的突变特征的研究未能发现引起两种癌症的不同突变过程,从而削弱了通过突变特征来区分两种癌症的能力。在这项研究中,研究者破译并比较了膀胱尿路上皮癌(BLCA)和宫颈鳞状细胞癌(CESC)的突变特征。他们从37098个体细胞突变的130个外显子中破译了4个BLCA突变特征,从44206个体细胞突变的194个外显子中破译了5个CESC突变特征。其中发现了3个突变特征在 BLCA 和 CESC 发展过程中有相同的内源性突变过程。两种癌症中发现的第4个突变特征均揭示了病毒感染在两种癌症发生中的重要角色。值得注意的是,突变特征4在CESC中是一个未在其他研究中描述过的新发现的突变特征。总之,研究者通过破译突变特征揭示了 BLCA 和 CESC 的相同和不同之处。这项研究为日后使用突变特征来阐明人类癌症通过内源性和外源性致癌物引起体细胞突变的机制提供了线索。原始出处:Zhou N1, Yuan Y1, Long X.et al.Mutation

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    2017-09-26 fengxiangxin301

    谢谢分享

    0

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    2017-09-26 中医痴

    不错的.学习了.谢谢分享!

    0

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Cancer Gene Ther:GLUT1基因在膀胱泌尿道上皮细胞癌中的多态性分析以及与p53、Ki67和GLUT1表达的关系

最近,有研究人员就两个葡萄糖载体1(GLUT1)在膀胱泌尿道上皮细胞癌(UCC)患者和204名正常人中的单核苷酸多态性(SNPs)(XbaI G>T 和 HaeIII T>C)进行了研究分析。研究人员利用免疫组化实验评估了p53、Ki67和GLUT1的表达情况。研究发现,TT基因型的频率和XbaI G>T的T等位基因SNP频率在膀胱泌尿道上皮细胞癌病人中降低了。CC基因型的频率和

Sci Rep:在小鼠中,P2Y6缺失增加了排尿频率并且减弱了膀胱持续性收缩性

最近,在下尿路研究中,P2Y6受体在膀胱功能的作用吸引了很多科学家的注意。最近,有研究人员通过比较P2Y6缺失小鼠和野生型小鼠,设计了用来确定P2Y6受体对正常表型的下尿路功能的贡献研究。研究发现,在体内实验中,P2Y6缺失小鼠和野生型小鼠比较,P2Y6缺失小鼠表现为更高频率的排尿,并且膀胱容积更小。然而,在切除大脑和未麻醉条件下,膀胱内压力检测并未检测到膀胱填充压强和体积关系的差异。研究人员在体

Sci Rep:机械敏感性膀胱传入活动与膀胱出口梗阻微收缩关系鉴定

最近,有研究人员调查了患有膀胱出口梗阻(BOO)小鼠中膀胱机械敏感性单单元传入活动(SAAs)和它们与膀胱微收缩关系的特性。研究人员将雄性大鼠分为Sham组和BOO组。在手术后4天或者10天,研究人员将它们利用尿烷进行麻醉。另外,研究人员在膀胱填充期间,记录了来自L6脊神经后根的Aδ-纤维或者 C-纤维的SAAs。研究发现,与Sham组相比,BOO组表现出了更高数目的微收缩次数和更低水平的Aδ-纤