相关实验视频
Updated: Feb 1, 2026

07:00
Using Caco-2 Cells to Study Lipid Transport by the Intestine
Published on: August 20, 2015
19.8K
阿法替尼 (Afatinib) 改变了Caco-2细胞中的DNA甲基化和帕内斯样分化标记物
Ippei Uemura1, Natsuko Takahashi-Suzuki1, Takashi Satoh1
1Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 7-Jo 15-4-1 Maeda, Teine-ku, Sapporo, Hokkaido, 006-8585, Japan.
Advances in biological regulation
|January 30, 2026
概括
阿法替尼通过改变DNA甲基化来破坏肠道细胞分化,影响帕内斯样细胞标记物. 这可能解释了这种EGFR抑制剂治疗的癌症患者的胃肠道副作用.
科学领域:
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 阿法丁尼布是一种EGFR TKI,治疗肺癌,但引起胃肠道毒性.
- 它对肠道平衡和帕内斯样细胞分化的影响尚不清楚.
研究的目的:
- 调查阿法替尼对Caco-2细胞中帕内斯样细胞分化标记物的影响.
- 探索DNA甲基化在阿法替尼布诱导的变化中的作用.
主要方法:
- 在分化过程中,Caco-2细胞接受了阿法提尼布治疗.
- 评估了差异化标记的DNA甲基化,蛋白质和mRNA表达 (SOX9,DEFA5,OSR1,RIP140).
- 使用了西部涂抹,RT-qPCR和甲基化敏感限制酶-qPCR.
主要成果:
- 阿法替尼增加了DNA甲基化和减少了SOX9和DEFA5.5的蛋白质表达.
- 通过免疫染色观察到减少的帕内斯样分化标志物.
- 升调的OSR1和RIP140mRNA没有促进物甲基化变化.
结论:
- 阿法替尼通过依赖于DNA甲基化的SOX9/DEFA5.5抑制来调节帕内斯样差异化.
- 阿法替尼还可以独立于DNA甲基化诱导OSR1/RIP140.
- 这些发现可能与肠道上皮功能和阿法替尼的肠道上皮安全性有关.
相关概念视频
Alterations in Respiration II
1.8K
There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes...
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes...
1.8K
Altered States of Awareness
1.1K
Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
The ingestion of substances like stimulants or hallucinogens leads to chemical alterations in the brain...
The ingestion of substances like stimulants or hallucinogens leads to chemical alterations in the brain...
1.1K
iPS Cell Differentiation
3.1K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
3.1K
B Cell Activation and Differentiation
16.6K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
16.6K
DNA-only Transposons
17.4K
DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
The donor site from where the transposon is excised is either degraded or...
17.4K
Alterations in Blood Pressure
2.2K
Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart...
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart...
2.2K

