CD301b/MGL2+ 単核ファゴサイト オーケストラ 自身免疫性心臓弁炎および線維症
Lee A Meier1,2,3, Jennifer L Auger1,2, Brianna J Engelson1,3
1Center for Immunology (L.A.M., J.L.A., B.J.E., H.M.C., M.I.G.-T., B.A.B.).
Circulation
|February 2, 2018
まとめ
単核ファゴサイト (MNPs) は,TNFやIL-6のような炎症性分子を発現することで,自己免疫性ミトラ弁疾患 (MVD) を誘導する. SykとVLA-4を含むこれらの経路をターゲットにすることは,MVDの潜在的な治療戦略を提供します.
科学分野:
- 免疫学
- 心血管生物学
- 病理学について
背景:
- バルブ性心臓病,特にミトラルバルブ病 (MVD) は一般的ですが,その基礎となる細胞および分子メカニズムはまだ十分に理解されていません.
- 自己免疫疾患は重度の線維炎性MVDにつながり,疾患の発症と進行経路の研究が必要である.
研究 の 目的:
- T細胞受容体トランスジェニックマウスモデルにおける自己免疫性MVDの細胞および分子駆動因子を解明する.
- MVDの病原性における単核ファゴサイト (MNPs) の役割を調査する.
- マウスでの発見とヒトのリウマチ性心疾患との相関性により,潜在的な治療標的を特定する.
主な方法:
- K/B.g7マウスのMV浸透細胞を特徴付けるために,多パラメータフロー細胞測定と免疫光を用いた.
- 特定のMNP集団 (CX3CR1+またはCD301b/MGL2+MNP) の遺伝子除去と,MNP内の条件付き遺伝子削除 (Syk,VLA-4) を採用した.
- 主要な炎症性サイトカイン (TNF,IL-6) に対する抗体阻害研究を行い,骨髄キメリックマウスを用いて細胞の起源と反応を決定した.
主要な成果:
- CX3CR1とCD301b/MGL2を発現するMNPは,人のリウマチ性心疾患に見られる細胞に類似した炎症性MVで浸透する細胞が優勢であった.
- MVD発症から保護されたマウスのCX3CR1+またはCD301b/MGL2+MNPの除去
- Syk,TNF,IL-6,VLA-4,VCAM-1を含む炎症メディエーターは,バルブ細胞にTNF受容体-1を介して作用する重要な駆動体として特定されました.
結論:
- CD301b/MGL2+MNPは,このモデルにおける自己免疫性MVDの病原性において中心的であり,ヒトのリウマチ性心疾患に存在する.
- 主要な炎症分子 (Syk,TNF,IL-6,VLA-4,VCAM-1) は,MVDの進行を指揮し,治療標的としての可能性を強調しています.
関連する概念動画
Inflammation
62.5K
Overview
62.5K
Heart Valves
12.5K
The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
12.5K
Cystic Fibrosis: Pathogenesis
896
Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
896
Autoimmune Disorders
1.9K
Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
Concept and Mechanism of Autoimmune Diseases
The immune...
1.9K
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
Cystic Fibrosis: Management
549
Cystic fibrosis (CF) is an autosomal recessive disorder that predominantly affects individuals of Northern European descent, occurring at a rate of 1 in 3500. It is caused by a genetic mutation in a gene on chromosome 7, most commonly the ΔF508 mutation, that codes for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. This results in thicker mucus secretions and obstruction pathologies in multiple organs, including the lungs and sinuses.
Sinus disease and chronic...
Sinus disease and chronic...
549


