相关实验视频

Updated: Jun 25, 2026

Quantification of Fungal Colonization, Sporogenesis, and Production of Mycotoxins Using Kernel Bioassays

Quantification of Fungal Colonization, Sporogenesis, and Production of Mycotoxins Using Kernel Bioassays

Published on: April 23, 2012

在表达基因编辑Neil1的小鼠中诱导了阿弗拉托克素B₁-诱导的肝细胞突变

Irina G Minko¹, Vladimir L Vartanian¹, Michael M Luzadder¹

¹Oregon Institute of Occupational Health Sciences, Oregon Health and Science University, Portland, Oregon, USA.

Environmental and molecular mutagenesis

|May 9, 2025

概括

肝细胞癌 (HCC) 的风险随着阿弗拉托克辛B1 (AFB1) 暴露而增加. 一些NEIL1基因变异,如A51V和G83D,损害DNA修复,可能会增加暴露个体的HCC风险.

科学领域:

分子生物学和毒理学.
癌症研究癌症研究
DNA 修复机制的修复机制

背景情况:

肝细胞癌 (HCC) 是癌症死亡的主要原因,与包括阿弗拉托克辛B1 (AFB1) 暴露在内的因素有关.
AFB1诱导基因切除修复途径修复的突变性DNA病变,由DNA糖酶NEIL1.1启动.
在小鼠中,NEIL1缺乏会加剧AFB1诱导的突变和致癌,已知存在人类NEIL1变体 (A51V,G83D).

研究的目的:

在小鼠模型中研究特定的人类NEIL1变异 (A51V,G83D) 对AFB1诱导的突变发生的影响.
为了比较表达这些变异的小鼠中的突变频率和光谱,与野生型和NEIL1缺乏的小鼠相比.

主要方法:

同卵性尼尔1^A51V和尼尔1^G83D小鼠在6天大时接受了AFB1的单剂量.
暴露后2.5个月,使用双重测序来分析肝脏基因组,以评估突变频率和光谱.
数据与野生型 (WT) 和Neil1^-/-小鼠的现有数据进行了比较.

主要成果:

表达Neil1^A51V和Neil1^G83D的小鼠在AFB1暴露后显示出与WT小鼠相比的突变频率.
然而,Neil1^A51V和Neil1^G83D模型都显示出A/T位点的基替代比例较高.
这种突变特征与NEIL1功能受损相一致,类似于NEIL1缺陷.

结论:

虽然A51V和G83DNEIL1变种没有增加整体突变频率,但在对AFB1.1的反应中改变了突变谱.
这些发现表明,携带这些NEIL1变异的个体可能对AFB1诱导的HCC敏感性增加.
需要进一步的研究来阐明这些NEIL1变异在肝癌发生过程中的精确机制和临床影响.

关键词:

造成的DNA损伤是DNA损伤.费皮提出了补充意见.双重测序是指双重的测序.肝细胞癌是肝细胞癌.多态变体的多态变体

更多相关视频

RNAi-mediated Control of Aflatoxins in Peanut: Method to Analyze Mycotoxin Production and Transgene Expression in the Peanut/Aspergillus Pathosystem

RNAi-mediated Control of Aflatoxins in Peanut: Method to Analyze Mycotoxin Production and Transgene Expression in the Peanut/Aspergillus Pathosystem

Published on: December 21, 2015

Inhibition of Aspergillus flavus Growth and Aflatoxin Production in Transgenic Maize Expressing the α-amylase Inhibitor from Lablab purpureus L.

Inhibition of Aspergillus flavus Growth and Aflatoxin Production in Transgenic Maize Expressing the α-amylase Inhibitor from Lablab purpureus L.

Published on: February 15, 2019

相关概念视频

In-vitro Mutagenesis

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.