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Интерлейкин 18

Интерлейкин 18 (интерферон-гамма-индуцирующий фактор)
Обозначения
Символы IL18; IGIF, IL1F4, IL-1g, IL-18
Entrez Gene 3606
HGNC 5986
OMIM 600953
RefSeq NM_001562
UniProt Q14116
Другие данные
Локус 11-я хр. , 11q22.2-q22.3
Логотип Викиданных Информация в Викиданных ?

Интерлейкин 18 (англ. interleukin 18, IL-18) — провоспалительный цитокин, принадлежащий к семейству интерлейкина 1. Синтезируется макрофагами и другими клетками организма. Играет значительную роль в инфекционных и аутоиммунных заболеваниях. Был впервые открыт в 1995 году в качестве интерферон-гамма-индуцирующего фактора, который увеличивал активность клеток ЕК в селезёнке, причём его активность выше, чем у интерлейкина 12.

Свойства и передача сигнала

Интерлейкин-18 синтезируется в виде белка-предшественника, состоящего из 192 аминокислот, который под действием интерлейкин-1 превращающего фермента расщепляется до зрелого белка из 157 аминокислот. После секреции из клетки-продуцента интерлейкин-18 связывается либо с интерлейкин-18-связывающим белком, который инактивирует его, либо с интерлейкин-18-рецепторным комплексом. Последний включает рецептор интерлейкина-18 (IL-1R5), входящий в надсемейство интерлейкин-1/толл-подобных рецепторов, и интерлейкин-18-дополняющий белок (IL-1R7). После формирования лиганд-рецепторного комплекса к нему присоединяется адаптерный белок MyD88 и киназа IRAK1, запускающая сигнальный путь, активирующий провоспалительный фактор трансрипции NF-κB.

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