…Jaundice is a typical example of this condition. Most bilirubin is produced from hemoglobin in red blood cells that have reached the end of their lifespan, and is sent to the liver where it is conjugated with glucuronic acid (this is called conjugated or direct bilirubin, while bilirubin before conjugation is called unconjugated or indirect bilirubin), becomes water-soluble, and is excreted with bile. Even if there is no liver damage, if the amount of bilirubin produced exceeds the liver's capacity due to hemolysis or other reasons (in this case the concentration of indirect bilirubin increases), liver cells are damaged, or the flow of bile is obstructed, causing abnormalities in this process, resulting in jaundice. … *Some of the terminology that refers to "indirect bilirubin" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…黄疸はこのような状態の代表的なものである。ビリルビンの大部分は,寿命のつきた赤血球のヘモグロビンからつくられ,肝臓に送られてグルクロン酸と抱合され(これを抱合型または直接型ビリルビンといい,抱合前のビリルビンを非抱合型あるいは間接型ビリルビンという),水溶性となって胆汁とともに排出される。そこで肝臓に障害がなくとも,溶血などによって肝臓の能力を上回ってビリルビンの産生量が増したり(この場合には間接型ビリルビンの濃度が上昇する),肝細胞が障害されたり,胆汁の流れが阻害されて,この過程に異常が起こると黄疸となる。… ※「間接型ビリルビン」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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