相关实验视频

Updated: Mar 18, 2026

Defining Gene Functions in Tumorigenesis by Ex vivo Ablation of Floxed Alleles in Malignant Peripheral Nerve Sheath Tumor Cells

Defining Gene Functions in Tumorigenesis by Ex vivo Ablation of Floxed Alleles in Malignant Peripheral Nerve Sheath Tumor Cells

Published on: August 25, 2021

雄性氨酸13-Cre表达在Notch1化小鼠中引起意外的生殖线删除

Robert J Danaher¹, Vanessa Alves Handel¹, Lei Wang¹

¹Center for Oral Health Research, College of Dentistry, University of Kentucky, Lexington, Kentucky, USA.

Genesis (New York, N.Y. : 2000)

|March 17, 2026

概括

这项研究调查了口腔免疫中的表皮Notch1受体激活,该研究意外地发现了Notch1淘汰小鼠的生殖线重组,这是由于精子生成期间的促进剂活性. 这挑战了标准的淘汰赛协议,并强调了在小鼠模型中需要谨慎的实验设计.

科学领域:

免疫学免疫学免疫学
遗传学是一个遗传学.
口腔生物学口腔生物学

背景情况:

诺奇1受体信号传递对于上皮质平衡和免疫调节至关重要.
在口腔粘膜免疫和先天反应中Notch1的特定作用,包括像脂酶A2IIA组 (PLA2-IIA) 这样的抗菌蛋白,尚不清楚.
需要表皮特异性的Notch1淘汰赛小鼠来研究这些功能.

研究的目的:

在Balb/c背景上创建表皮特异性的Notch1淘汰赛小鼠,以研究其在口腔粘膜免疫中的作用.
评估上皮层Notch1激活对口腔先天性免疫反应的影响,特别是PLA2-IIA的产生.
建立一个可靠的小鼠模型来研究口腔表皮中的Notch1功能.

主要方法:

通过交叉C57BL/6; K13Cre; Notch1Flox/Flox小鼠与表达Balb/c的PLA2-IIA小鼠生成Balb/c; K13Cre; Notch1Flox/Flox小鼠.
使用Cre-loxP系统与Krt13促进剂 (K13Cre) 进行表皮特异性的Notch1删除.
首代小鼠的基因定型,以确认Notch1基因型并识别出意想不到的重组事件.

主要成果:

意想不到的是,表达K13Cre的第一代小鼠表现出不可能的K13Cre;Notch1同位素基因型.
脱的Notch1 PCR安普利康的缺失是由于LoxP位点与前部原料相邻的再组合,发生在生殖线中.
通过使用女性K13Cre; Notch1Flox捐赠者,成功避免了这种意外的重组.

结论:

皮质Notch1淘汰赛小鼠生成揭示了在精子发生过程中与Krt13促进体活性相关的生殖线重组的意外问题.
这一发现在设计基于Cre-loxP的淘汰策略时需要谨慎,特别是在促进体表达时间方面.
替代的育种策略,如使用特定的性捐赠者,可以规避在生成转基因小鼠模型时面临的技术挑战.

关键词:

克雷-洛克斯PP 的使用.标记1 标记1 标记皮质上皮质上皮质上皮质.细菌线的生殖线酸盐 13 酸盐 13 酸盐鼠标遗传学鼠标遗传学

更多相关视频

Removal of an Internal Translational Start Site from mRNA While Retaining Expression of the Full-Length Protein

Removal of an Internal Translational Start Site from mRNA While Retaining Expression of the Full-Length Protein

Published on: March 16, 2022

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

Published on: July 3, 2020

相关概念视频

Notch Signaling Pathway

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...

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.