インターフェロン-γは,抗腫瘍免疫を促進する Treg 脆弱性を促進する
Abigail E Overacre-Delgoffe1, Maria Chikina2, Rebekah E Dadey3
1Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Cell
|May 30, 2017
まとめ
制御性T細胞 (Tregs) は抗腫瘍免疫を阻害する. ニューロピリン-1欠乏症のTregsからのインターフェロン・ガンマによって引き起こされる彼らの脆弱性は,腫瘍のクリアランスと免疫療法の応答を高めます.
科学分野:
- 免疫学
- 癌 生物学
- 細胞免疫学
背景:
- 調節性T細胞 (Tregs) は抗腫瘍免疫反応を抑制する.
- 神経ピリン-1 (Nrp1) は,腫瘍内のTregの安定性には重要ですが,周辺の耐性には重要ではありません.
- トレグ特異的なNrp1の消去は,トレグ機能を低下させ,腫瘍耐性を引き起こす.
研究 の 目的:
- 腫瘍内Tregの安定性と機能におけるNrp1の役割を調査する.
- トレグの脆弱性を誘発するメカニズムと,その抗腫瘍免疫への影響を特定する.
- 癌の免疫療法におけるTregの脆弱性を標的とした治療の可能性を調査する.
主な方法:
- NRP1+ Tregの割合をヒトのメラノーマと頭頸部状細胞がん患者のデータで分析した.
- メラノーマ環境におけるNrp1欠乏症および野生型のTregsを評価するために競争性のマウスモデルを使用する.
- 腫瘍内Tregsによるインターフェロン・ガンマ (IFNγ) 産生を測定する.
主要な成果:
- 高濃度の腫瘍内NRP1+Tregは,特定のがんの予後不良と相関しています.
- Nrp1欠乏したTregはIFNγを産生し,周囲の野生型Tregの脆弱性を誘発する.
- IFNγ誘発のTreg脆弱性は,抗腫瘍免疫と腫瘍クリアランスを強化する.
- Tregの脆弱性は,抗PD1治療への反応に不可欠である.
結論:
- TregsにおけるNrp1発現は,がんの予後に関連している.
- Nrp1欠乏したTregsによって生成されるIFNγは,他のTregsを不安定化することによって,抗腫瘍免疫を促進する.
- Tregの脆弱性をターゲットにすることは,がん免疫療法の有効性を改善するための有望な戦略です.
関連する概念動画
Tumor Immunotherapy
2.1K
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.
2.1K
Cytotoxic T Cells-mediated Immune Response
7.7K
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
7.7K
T Cell Types and Functions
2.9K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
2.9K
The Tumor Microenvironment
8.0K
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...
8.0K
TGF - β Signaling Pathway
10.7K
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...
10.7K
Inflammatory Response
17.6K
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
17.6K


