統合されたストレス反応は,リポカリン2を通じて免疫逃避を促進します
Jozef P Bossowski1, Ray Pillai1,2,3, John Kilian4,5
1Department of Pathology, New York University Grossman School of Medicine, New York, NY, USA.
Nature
|February 18, 2026
まとめ
癌細胞は統合ストレス反応 (ISR) と活性化転写因子4 (ATF4) を使用して,治療に抵抗します. ATF4-リポカリン2 (LCN2) 軸をターゲットにすることで,腫瘍に対するT細胞免疫力を高めます.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
背景:
- 癌細胞は統合ストレス反応 (ISR) を活性化し,治療に適応し抵抗する.
- ISRは,細胞内在のプログラムを調節するトランスクリプション因子4 (ATF4) の活性化に収束します.
- 抗腫瘍免疫におけるISR-ATF4軸の役割はほとんど不明である.
研究 の 目的:
- 抗腫瘍免疫応答に対するISR-ATF4軸の影響を調査する.
- 抗がん免疫に影響を与える重要なATF4調節効果因子を特定する.
主な方法:
- 免疫能力のあるマウスと免疫低下マウスの腫瘍進行に関する研究.
- ATF4調節遺伝子の偏見のない遺伝子スクリーニング.
- T細胞浸透とマクロファージ集団の分析.
- ヒトの肺および臓腺癌患者のデータにおける相関性研究.
- マウスモデルにおける抗LCN2抗体を用いた治療介入.
主要な成果:
- ATF4の喪失は,T細胞に依存した免疫力を高めることで,免疫能力のあるマウスの腫瘍進行を著しく低下させた.
- リポカリン2 (LCN2) は,抗腫瘍免疫を低下させる主要なATF4依存エフェクターとして特定されました.
- LCN2はT細胞の排除と免疫回避を促進し,ヒトがんにおけるT細胞の浸透率の減少と相関しています.
- 抗LCN2抗体は,攻撃的な固体腫瘍モデルにおける抗腫瘍T細胞の反応を効果的に促進した.
結論:
- ATF4-LCN2軸は,抗癌免疫を抑制する上で重要な細胞外的な役割を果たしています.
- LCN2を標的にすることは,抗腫瘍T細胞の反応を強化するための潜在的な免疫療法戦略です.
- この軸は,攻撃的な固体腫瘍に対する新たな治療標的となる可能性があります.
関連する概念動画
Cells of the Innate Immune Response
9.7K
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
9.7K
Inflammatory Response
17.3K
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,...
17.3K
Immune Surveillance by NK Cells and Phagocytes
8.9K
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
8.9K
Regulation of the Unfolded Protein Response
3.1K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
3.1K
Other Stress Responses in Bacteria
448
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
448
Immune Response Against Viral Pathogens
2.2K
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
2.2K


