関連する実験動画
Updated: Jul 29, 2026

09:19
Isolation of Human Umbilical Vein Endothelial Cells (HUVEC)
Published on: April 28, 2007
低酸素のヒト静脈内皮細胞の再生酸素化は,古典的な補足経路を活性化させます
C D Collard1, A Väkevä, C Büküsoglu
1Department of Anesthesia, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass. 02115, USA.
Circulation
|July 1, 1997
まとめ
低酸素と再酸素化の増加は,主に古典的な経路経由で,ヒト内皮細胞のC3堆積を補完します. これは,規制タンパク質CD46およびCD55のレベルが上昇したにもかかわらず起こります.
科学分野:
- 免疫学 免疫学とは
- 血管生物学 血管生物学
- 細胞生理学 細胞生理学
背景:
- イシュミア・リパーフュージョンによる損傷は,コンプリメントの活性化と内皮細胞の堆積を誘発する.
- 人間の静脈内皮細胞 (HUVECs) は,このプロセスの中心です.
- この研究は,低酸素/低酸素状態下での補完体活性化と調節性タンパク質発現を調査しています.
研究 の 目的:
- ヒポキシアとリオキシゲネーションがHUVECsで補充活性化しているかどうかを判断する.
- CD46およびCD55.5のHUVEC表面表現への影響を評価する.
- この活性化に関与する補足経路を解明する.
主な方法:
- HUVECは,ヒトの血清で,さまざまな期間 (1%) の低酸素に被曝し,その後にリオキシジネーション (21%) が続いた.
- コンプリメントC3の堆積は,ELISAを用いて測定した.
- CD46とCD55のHUVEC表面表現とiC3bの堆積は,フローサイトメトリーとウエスタンブロットで評価されました.
主要な成果:
- 低酸素とリオキシゲネーションは,ノルモキシック対照と比較して,HUVECのC3堆積を大幅に増加させた.
- 補足経路の阻害は,リオキシゲネーション中のC3堆積を弱めた.
- CD46とCD55のiC3b収納の増加とHUVEC表面発現が観察されました.
結論:
- 低酸素と再酸素化は,HUVECにおける古典的な補足経路を活性化させ,iC3bの蓄積を増加させます.
- コンプリメントC3の堆積は,主に古典的な経路によって媒介されます.
- 補完体活性化にもかかわらず,CD46とCD55のHUVEC表面発現は増加する.
関連する概念動画
Regulation of Angiogenesis and Blood Supply
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Extrinsic and Intrinsic Pathways of Hemostasis
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
Oxygen Transport in the Blood
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...

