機能不全な腫瘍血管系の標的化
Qian Lin1,2, Beichen Cai1,2, Ruonan Ke1,2
1Department of Plastic Surgery, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China.
iScience
|December 23, 2025
まとめ
オートファジーは腫瘍血管系を決定的に調節し、がんの増殖と治療抵抗性に影響を与える。特に腫瘍内皮細胞(TEC)におけるこのプロセスを標的化することは、有望な治療法を提供する。
科学分野:
- 腫瘍学
- 分子生物学
- がん研究
背景:
- 腫瘍血管系は、がんの進行と治療抵抗性にとって重要である。
- オートファジーは、腫瘍内の内皮細胞機能の重要な調節因子である。
- 血管オートファジーの理解は、新規がん治療法の開発にとって不可欠である。
研究 の 目的:
- 腫瘍血管系におけるオートファジーに関する現在の知識をレビューする。
- 血管オートファジーの分子メカニズム、細胞間相互作用、および治療的応用を調べる。
- 臨床応用への課題と将来の方向性を強調する。
主な方法:
- オートファジーと腫瘍血管系に関する現在の研究を統合した文献レビュー。
- 腫瘍内皮細胞(TEC)におけるオートファジーを調節する分子経路の分析。
- 間質細胞の相互作用と免疫系と血管オートファジーとの相互作用の検討。
主要な成果:
- TECにおけるオートファジーは、mTOR/AMPKシグナル伝達、VEGF、およびストレス応答によって調節される。
- 間質細胞(周皮細胞、プロテオグリカン)は、直接的および旁分泌的シグナル伝達を通じて血管オートファジーに影響を与える。
- 併用療法(オートファジー阻害剤+抗血管新生薬/ICI/化学療法)は、前臨床試験で有望視されている。
結論:
- 血管オートファジーは、腫瘍の生存を支持し、脆弱性を生み出すという二重の役割を果たす。
- 臨床応用には、TEC特異的な調節因子、バイオマーカー、および最適化された戦略が必要である。
- 血管オートファジーを標的化することは、がんにおける治療抵抗性を克服するための潜在的な戦略を提供する。
関連する概念動画
Targeted Cancer Therapies
8.6K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
8.6K
Autophagy
5.6K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
5.6K
Regulation of Angiogenesis and Blood Supply
3.3K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.3K
Delivery Pathways to the Lysosome
8.7K
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
8.7K
mTOR Signaling and Cancer Progression
4.6K
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...
4.6K
Mechanism of Angiogenesis
6.6K
Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
6.6K


