Effects of recombinant human tissue factor pathway inhibitor on thrombus formation and its in vivo distribution in a rat DIC model

Yusri Ali Elsayed, Kazunori Nakagawa, Yu Ichi Kamikubo, Kei Ichi Enjyoji, Hisao Kato, Katsuo Sueishi

研究成果: Contribution to journalArticle査読

28 被引用数 (Scopus)

抄録

Tissue factor pathway inhibitor (TFPI) plays a key role in modulating tissue factor-dependent blood coagulation. This study was done to determine nut only the inhibitory effects of recombinant human TFPI (rTFPI) on thrombus formation in rat models with disseminated intravascular coagulation (DIC), but also to identify the distribution of exogenous TFPI in vivo. Disseminated intravascular coagulation was induced by administering a priming dose of carrageenan 10 mg/kg body weight and was followed 24 hours later by a provocative dose of lipopolysaccharide (LPS) 500 mg/kg body weight. The rTFPI was administered intravenously at a dose of either 1 or 4 mg/kg body weight immediately after LPS treatment. Exogenous rTFPI at a dose of 4 mg/kg significantly inhibited the consumption of fibrinogen, platelets and factor VIis (P < .05) and also reduced the number of fibrin thrombi formed in the liver, lungs, kidneys, and spleen (P < .05), whereas rTFPI at a dose of 1 mg/kg had no significant inhibitory effect on these DIC parameters. Recombinant human rTFPI activity was rapidly cleared from the plasma; however, a significant amount of the inhibitor was still present in tissues even 3 to 6 hours after intravenous administration. Exogenous TFPI was mainly identified in Kupffer cells, macrophages, and on the microvascular endothelial lining of different organs. In the kidney, rTFPI was identified on both the abluminal surface of the renal tubules and the luminal surface of the proximal convoluted tubules. No rTFPI, however, was detected in the hepatocytes. Tissue factor was mainly expressed by monocytes/macrophages. These findings suggest that TFPI plays an important role in modulating TF- dependent thrombogenesis. The elucidation of the rTFPI distribution and interactions in vivo might thus provide valuable insight into its inhibitory mechanisms as well as its therapeutic implications in DIC.

本文言語英語
ページ(範囲)574-583
ページ数10
ジャーナルAmerican Journal of Clinical Pathology
106
5
DOI
出版ステータス出版済み - 11 1996

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine

フィンガープリント 「Effects of recombinant human tissue factor pathway inhibitor on thrombus formation and its in vivo distribution in a rat DIC model」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル