相关实验视频
Updated: May 26, 2026

Modeling Oral-Esophageal Squamous Cell Carcinoma in 3D Organoids
Published on: December 23, 2022
朗格汉斯细胞促进上皮细胞DNA损伤和状细胞癌
Badri G Modi1, Jason Neustadter, Elisa Binda
1Department of Dermatology, Yale University School of Medicine, New Haven, CT 06520, USA.
朗格汉斯细胞 (LCs) 代谢致癌的多芳香碳化合物 (PAHs),如DMBA,促进皮肤癌. 移除LCs保护小鼠免受PAH诱导的DNA损伤和突变,揭示了这些免疫细胞在化学致癌过程中的关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 皮肤病学 皮肤病学
- 毒理学 毒理学 毒理学
背景情况:
- 多芳香碳化合物 (PAH) 是常见的环境致癌物.
- 7,12-二甲基[a] (DMBA) 是一种PAH模型,用于化学致癌研究.
- 朗格汉斯细胞 (LCs) 是表皮树突细胞 (DCs),对皮肤免疫至关重要.
研究的目的:
- 调查LCs在DMBA诱导的皮肤化学致癌症中的作用.
- 阐明LCs影响PAH诱导的DNA损伤和瘤发展的机制.
主要方法:
- 利用基因缺乏LCs的小鼠来评估它们在DMBA诱导的皮肤癌发生中的作用.
- 分析了LC缺乏皮肤中的DMBA代谢,并测量了Hras突变.
- 将DMBA-trans-3,4-diol应用于LC缺乏的小鼠,以绕过瘤抵抗.
- 研究了人类LCs对DMBA基因毒性在人类角质细胞的影响.
主要成果:
- 缺乏LC的小鼠对DMBA诱导的皮肤癌表现出耐药性,独立于T细胞.
- LCs有效地将DMBA代谢成一种与Hras突变相关的中间体 (DMBA-trans-3,4-diol).
- 缺乏LC的皮肤表现出减少DMBA诱导的DNA损伤和较少的Hras突变.
- 在LC缺乏的小鼠中,DMBA-trans-3,4-diol的应用恢复了瘤发生.
- 人类LC增强了DMBA对角质细胞的基因毒性作用.
结论:
- 组织相关的树突细胞,特别是LCs,可以通过PAH代谢增强化学致癌.
- LCs在促进DMBA诱导的皮肤DNA损伤和突变方面发挥着直接作用.
- 这些发现揭示了免疫细胞和化学致癌之间的复杂相互作用,独立于适应性免疫.
更多相关视频
07:29Intramucosal Inoculation of Squamous Cell Carcinoma Cells in Mice for Tumor Immune Profiling and Treatment Response Assessment
Published on: April 22, 2019
07:43Four-color Fluorescence Immunohistochemistry of T-cell Subpopulations in Archival Formalin-fixed, Paraffin-embedded Human Oropharyngeal Squamous Cell Carcinoma Samples
Published on: July 29, 2017
相关概念视频
Skin Cancer
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Nucleotide Excision Repair
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Nucleotide Excision Repair
DNA Damage can Stall the Cell Cycle
DNA Damage Can Stall the Cell Cycle
Abnormal Proliferation