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相关概念视频

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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...
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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.
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Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
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在与癌症相关的纤维细胞中抑制NNMT可恢复抗瘤免疫力

Janna Heide1, Agnes J Bilecz1, Samarjit Patnaik2

  • 1Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA.

Nature
|July 23, 2025
PubMed
概括

尼古丁胺N-甲基转移酶 (NNMT) 通过招募免疫抑制细胞来促进癌症. 在癌症相关纤维细胞 (CAF) 中抑制NNMT可增强抗瘤免疫力并减少瘤生长,从而提供一种新的治疗策略.

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科学领域:

  • 癌症学
  • 免疫学
  • 分子生物学

背景情况:

  • 与癌症相关的纤维细胞 (CAF) 在瘤进展中起着至关重要的作用.
  • 在癌症治疗中准CAF仍然是一个挑战.

研究的目的:

  • 研究尼古丁胺N-甲基转移酶 (NNMT) 在高度血清性卵巢癌中的作用.
  • 确定NNMT作为癌症治疗的潜在治疗点.

主要方法:

  • 使用空间转录和单细胞RNA测序.
  • 在卵巢,乳腺和结肠癌的同基因小鼠模型中评估了NNMT的作用.
  • 使用高通量查来识别NNMT抑制剂.

主要成果:

  • 通过诱导CAF中的H3K27me3低甲基化,NNMT促进瘤生长,导致免疫抑制因子的分泌和骨髓衍生抑制细胞 (MDSC) 的招募.
  • 在多种癌症模型中,NNMT绝杀抑制了瘤生长和增强了CD8+ T细胞激活.
  • 一种新的NNMT抑制剂降低了瘤负担,转移,并恢复了抗瘤免疫力.

结论:

  • 在瘤微环境中,NNMT是CAF和免疫抑制的关键调节者.
  • 针对NNMT是一种有前途的治疗策略,可以增强抗瘤免疫力并克服治疗耐药性.