相关实验视频
Updated: Jun 21, 2025

08:07
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
7.2K
原蛋白修饰重塑了肉瘤瘤的微环境,并促进了对免疫检查点抑制的抵抗力
bioRxiv : the preprint server for biology
|July 15, 2024
概括
普洛-氨酸,2-氧格酸-5-二氧化酶2 (Plod2) 在软组织肉瘤中促进免疫逃避. 用米诺克西迪尔抑制Plod2可减少瘤生长,并增强无差异多形肉瘤中抗PD-1免疫疗法的疗效.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 生物化学 生物化学
背景情况:
- 免疫检查点抑制剂 (ICI) 反应在固体瘤中显著变化,包括软组织肉瘤 (STS).
- 这种异质性的分子驱动因素,特别是STS中的免疫逃避机制,尚未完全理解.
- 在许多瘤中,公素-lysine,2-oxoglutarate 5-dioxygenase 2 (Plod2) 的过度表达与转移有关.
研究的目的:
- 调查Plod2在无差异性多形肉瘤 (UPS) 中免疫逃避中的作用,这是一个积极的STS亚型.
- 为了确定Plod2抑制是否可以提高抗PD-1免疫疗法的疗效.
- 探索Plod2作为增强癌症免疫治疗的潜在治疗标.
主要方法:
- 使用了UPS的免疫能力强的同源移植模型.
- 使用泛Plod转录抑制剂米诺西迪尔,对Plod2进行遗传和药理抑制.
- 评估Plod2调节后对抗PD-1治疗的瘤生长和反应.
主要成果:
- 发现plod2的过度表达促进了UPS的免疫逃避.
- 通过遗传或药理手段 (米诺克西迪尔) 抑制Plod2,降低了UPS瘤的生长.
- 在这个模型中,Plod2抑制显著提高了抗PD-1疗法的疗效.
- Plod2的酶标,VI型原体 (ColVI),与CD8+T细胞功能障碍有关.
结论:
- Plod2被确定为不分化的多形肉瘤中免疫逃避的关键调解者.
- 准Plod2是一个有希望的策略,可以克服免疫治疗的耐药性.
- 调节Plod2活性可以改善UPS和潜在的其他癌症中对抗PD-1治疗的反应.
相关概念视频
The Tumor Microenvironment
6.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.6K
Tumor Immunotherapy
509
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
509
Adaptive Mechanisms in Cancer Cells
5.7K
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
5.7K
mTOR Signaling and Cancer Progression
3.8K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.8K
Treatment Resistant Cancers
3.3K
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.3K

