相关实验视频
Updated: Jul 12, 2025

14:57
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
9.6K
APR-246增加了瘤抗原性,独立于p53
Judith Michels1,2, Divya Venkatesh1,2, Cailian Liu1,2
1Department of Pharmacology, Swim Across America and Ludwig Collaborative Laboratory, Weill Cornell Medicine, New York, NY, USA.
Life science alliance
|October 27, 2023
概括
APR-246增强了瘤细胞的免疫性,提高了T细胞的反应和疫苗的疗效,即使在p53缺乏的瘤中. 将APR-246与免疫激动剂结合起来,可以产生显著的抗瘤效应,提供了p53独立的治疗策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 药物发现 药物发现 药物发现
背景情况:
- 在此之前,APR-246显示了重编程瘤相关巨细胞的潜力,以克服对免疫检查点封锁的抵抗力.
- 研究了APR-246及其活性代谢物甲基氨基 (MQ) 在直接增强瘤细胞免疫性方面的作用.
研究的目的:
- 确定APR-246/MQ是否可以直接增加瘤细胞免疫性并增强抗瘤免疫反应.
- 探索APR-246与免疫调节剂的新组合,以提高抗瘤功效.
- 调查MQ诱导免疫性背后的机制.
主要方法:
- 用APR-246/MQ治疗小鼠B16F10黑色素瘤细胞.
- 对黑色素瘤特异性CD8+T细胞激活的评估.
- 使用MQ治疗细胞对瘤细胞疫苗疗效的评估.
- 开发和测试一种组合疗法,包括APR-246,TLR-4激动剂和CD40激动剂.
- 将MQ效应与乙胺,一种对氨酸有反应的化合物进行比较.
主要成果:
- MQ治疗增强了瘤细胞的免疫性,促进了CD8+ T细胞的激活.
- 一种使用MQ治疗细胞的瘤细胞疫苗表现出提高的疗效,独立于p53状态.
- 用APR-246,TLR-4激动剂和CD40激动剂的联合治疗产生了显著的抗瘤反应.
- MQ的免疫效应与其与醇反应性化能力有关,类似于乙胺.
结论:
- APR-246及其活性成分MQ可以直接增强瘤细胞免疫性,从而改善T细胞反应和疫苗疗效.
- 将APR-246与免疫调节剂结合,提供了一个有希望的p53独立的策略,用于引起有效的抗瘤免疫反应.
相关概念视频
Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
Interactions Between Signaling Pathways
6.3K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.3K
Mutagenicity and Carcinogenicity
1.3K
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
1.3K
Cancer-Critical Genes I: Proto-oncogenes
8.9K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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...
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...
8.9K
Loss of Tumor Suppressor Gene Functions
4.8K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
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...
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...
4.8K
The Intrinsic Apoptotic Pathway
6.6K
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
6.6K

