热点外显子15 BRAF中的突变在猫类瘤中不常见
Kei Kuroki1, Christine Tran Hoang2, Anita M Rogic2
1Veterinary Medical Diagnostic Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA.
Veterinary and comparative oncology
|July 17, 2024
概括
这种BRAF V600E突变驱动了许多人类和狗的癌症. 然而,这项研究发现BRAF突变在猫类瘤中很少见,在皮肤黑色素瘤中只发现了一种.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 进行比较基因组学.
背景情况:
- 编码MAPK信号通路中的关键蛋白质的BRAF基因在各种人类和犬类癌症中经常发生突变.
- BRAF V600E突变是黑色素瘤,甲状腺癌和结直肠癌等癌症中已知的驱动突变.
- 鉴于BRAF在不同物种的保存和共同的癌症途径,研究了它在猫类癌症中的作用.
研究的目的:
- 在一组猫类瘤中调查BRAF突变的频率和类型.
- 为了确定BRAF突变是否是常见猫类癌症的重要驱动因素.
- 为了比较猫类BRAF突变形状与人类和狗类癌症的突变形状.
主要方法:
- 开发了用于放大猫类BRAF基因第15个外显子的原始体.
- 分析了196只猫类瘤,使用了PCR amplicon的桑格测序.
- 识别和表征BRAF突变和变异.
主要成果:
- 一个单一的BRAF突变 (V597E),与犬类和人类热点突变相对应,在一个猫类皮肤黑色素瘤中被确定.
- 在23%的猫类瘤中发现了一个常见的同名变体 (BRAF T586T),被怀疑是单核酸多态.
- 在分析的常见猫瘤中,BRAF突变并不常见,包括经常在人类和狗中携带BRAF突变的类型.
结论:
- 在研究的猫类瘤群体中,BRAF突变是不常见的驱动因素.
- 猫癌基因组学,特别是BRAF突变档案,可能与人类或犬类对应物没有直接平行.
- 需要进一步的研究,以了解猫类癌症的遗传情景.
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