ヒアルロン酸の分子の柔軟性は,がん細胞の侵入に大きく影響を与えます
Uliana Bashtanova1, Agne Kuraite1, Rakesh Rajan1
1Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
Royal Society open science
|August 29, 2025
まとめ
高分子量ヒアルロン酸 (HA) は,高度に薄められた場合,癌細胞の移動を促進します. これは,希釈されたHAが柔軟性を獲得し,CD44受容体により強く結合し,がん細胞の侵入信号を誘発するからです.
科学分野:
- 生物化学
- 分子生物学
- 癌 研究
背景:
- 細胞外ヒアルロン酸 (HA) は癌において二重の役割を果たし,低分子量HAは進行と,高分子量HAはホメオスタシスと関連している.
- ハイアルーロン酸 (HA) 媒介の細胞シグナリングは,主に細胞表面受容体CD44との相互作用によって開始されます.
研究 の 目的:
- 高分子量ヒアルロン酸 (HA) が高濃度で癌細胞の移動を誘導する方法を調査する.
- HA-CD44の相互作用と,がん細胞の行動に対するその影響の基礎となる分子メカニズムを解明する.
主な方法:
- 核磁気共振 (NMR) スペクトロスコーピーは,高分子量HAの構成動態を,異なる濃度で分析するために使用された.
- 脳腫瘍細胞の形態とタンパク質の変化は,高濃度HA条件下で評価された.
主要な成果:
- 高分子量HAは,高度に薄められた場合,CD44のシグナル伝達に不可欠なナノ秒の時間スケールでCD44に強い結合を可能にする形状を採用します.
- 高濃度では,HA分子は柔軟性が低下し,CD44の強い結合を阻害する.
- 高濃度のHAは脳がん細胞の形態とタンパク質に重大な変化を起こし,侵入を促した.
結論:
- HAの分子柔軟性は,HA媒介細胞シグナル伝達に中心であり,CD44結合に対する濃度依存的効果を説明する.
- この発見は,HAの稀薄化と,その後のCD44シグナル伝達が,特に手術後の腫のような状況で,がん細胞の侵入と再発に寄与する可能性があることを示唆している.
関連する概念動画
Cancer Cell Migration through Invadopodia
2.4K
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However,...
2.4K
Cell Adhesion Molecules - Types and Functions
7.3K
Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
CAM Families
The Integrin family of proteins is primarily involved...
CAM Families
The Integrin family of proteins is primarily involved...
7.3K
Metastasis
5.7K
Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
5.7K
Cell-matrix's Response to Mechanical Forces
2.7K
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...
2.7K
Cell Migration
5.1K
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
5.1K
Adaptive Mechanisms in Cancer Cells
5.9K
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,...
5.9K


