Δ133p53异型增强TLR4功能以促进瘤生长
Sasini Polwatta Lekamlage1, Alexandra N Boix De Jesus1,2, Adriana Machado Saraiva1,3
1Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin, 9016, New Zealand.
Carcinogenesis
|August 29, 2025
概括
像Δ133p53这样的瘤蛋白53 (TP53) 异型促进癌症的生长. 向细胞表面蛋白质,如托尔样受体4 (TLR4),提供了一种抑制 Δ133p53 驱动的瘤进展和转移的新战略.
科学领域:
- 癌症学
- 分子生物学
- 癌症研究
背景情况:
- 瘤蛋白53 (TP53) 是癌症中经常发生突变的瘤抑制剂.
- 包括Δ133p53家族在内的TP53异型可以矛盾地促进瘤生长和转移.
- 向 Δ133p53 功能是对抗癌症转移的潜在治疗策略.
研究的目的:
- 确定参与 Δ133p53 介导的瘤增生的细胞表面蛋白质.
- 研究托尔类受体4 (TLR4) 在Δ133p53驱动的瘤进展中的作用.
- 评估针对 Δ133p53 表达瘤细胞表面变化的治疗潜力.
主要方法:
- 在表达Δ122p53 (Δ133p53家族成员) 的瘤小鼠模型中表达细胞表面蛋白质的特征.
- 抑制细胞表面转移和TLR4信号传递.
- 在治疗干预后评估瘤生长和转移.
主要成果:
- 在小鼠模型中抑制细胞表面流通减少了瘤生长和转移.
- 在表达Δ133p53/Δ122p53的细胞表面观察到托尔类受体4 (TLR4) 和亡抑制剂5的表达增加.
- 抑制TLR4信号足以减少Δ122p53的瘤生长.
结论:
- 通过刺激TLR4功能, Δ133p53有助于瘤的进展.
- 针对细胞表面蛋白质的改变,特别是TLR4,可以抑制 Δ133p53 介导的瘤增长.
- 这些发现表明了改变TP53异型的癌症的新疗法.
相关概念视频
Abnormal Proliferation
4.6K
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...
4.6K
TGF - β Signaling Pathway
7.6K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.6K
PI3K/mTOR/AKT Signaling Pathway
3.9K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.9K
mTOR Signaling and Cancer Progression
3.9K
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...
3.9K


