Related Experiment Video
Updated: Sep 11, 2025
An Optimized Protocol for Electrophoretic Mobility Shift Assay Using Infrared Fluorescent Dye-labeled Oligonucleotides
Published on: November 29, 2016
SOX2 is a dispensable modulator of NUT carcinoma oncogenesis in mouse
Abstract:
NUT carcinoma (NC) is a highly aggressive malignancy driven by BRD4::NUTM1 and other NUTM1 fusion oncogenes. BRD4::NUTM1 aberrantly activates transcription factors (TFs) linked to basal progenitor identity, producing poorly differentiated squamous phenotypes. Among these TFs, SOX2 has been proposed as a critical oncogenic driver, but its functional requirement in NC has not been tested in vivo. Using a genetically engineered mouse model that faithfully recapitulates human NC, we performed lineage-specific conditional deletion of Sox2 in both squamous and non-squamous tissues. We found that Sox2 is dispensable for NC initiation and progression, with tumors retaining characteristic histology and expression of key drivers including BRD4::NUTM1 , MYC , and TP63 . Transcriptomic profiling revealed only modest changes in Sox2 -deficient tumors, mainly affecting metabolic and biosynthetic pathways, without disrupting core oncogenic programs. These findings challenge the assumption that SOX2 is universally required in NC and suggest that SOX2-targeted therapies may have limited utility, refining the framework for therapeutic prioritization.
Summary Blurb:
This study shows that SOX2 is not required for NUT carcinoma initiation or maintenance in vivo, challenging its assumed oncogenic role and refining therapeutic target prioritization.
Insights
SOX2 is not required for NUT carcinoma initiation or progression. This study challenges the assumption of SOX2 as a universal oncogenic driver in NUT carcinoma, impacting therapeutic strategies.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- NUT carcinoma (NC) is an aggressive cancer driven by NUTM1 fusions, often linked to transcription factors like SOX2.
- SOX2 is hypothesized to be a key oncogenic driver in NC, but its in vivo requirement remains unproven.
Purpose of the Study:
- To investigate the functional requirement of SOX2 in NUT carcinoma initiation and progression using a genetically engineered mouse model.
- To determine the impact of SOX2 deletion on tumor histology, key oncogenic drivers, and transcriptional programs in NC.
Main Methods:
- Development of a genetically engineered mouse model for NC.
- Lineage-specific conditional deletion of the SOX2 gene in vivo.
- Histological analysis, molecular profiling (including key driver gene expression), and transcriptomic analysis of tumors.
Main Results:
- SOX2 is dispensable for NC initiation and progression.
- Tumors lacking SOX2 maintained characteristic NC histology and expression of BRD4::NUTM1, MYC, and TP63.
- Transcriptomic analysis revealed only minor changes in SOX2-deficient tumors, primarily in metabolic pathways, without altering core oncogenic programs.
Conclusions:
- SOX2 is not a universally required oncogenic driver in NUT carcinoma.
- Targeting SOX2 may have limited therapeutic utility in NC, necessitating a re-evaluation of therapeutic strategies.
- These findings refine the understanding of NC pathogenesis and inform future therapeutic prioritization.
More Related Videos
07:52Orthotopic Injection of Breast Cancer Cells into the Mammary Fat Pad of Mice to Study Tumor Growth.
Published on: February 8, 2015
09:08Integration of Bioinformatics Approaches and Experimental Validations to Understand the Role of Notch Signaling in Ovarian Cancer
Published on: January 12, 2020
Related Concept Videos
01:33Pleiotropy
02:43Mouse Models of Cancer Study
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
01:12Loss of Tumor Suppressor Gene Functions
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...