Zusammenfassung
In der sinusoidalen Membran beginnt die Gallebildung. Rezeptoren und Transporter erleichtern die Aufnahme und den Eintritt von Gallensäuren, Bilirubin, Fettsäuren und anderen Gallekomponenten in die Leberzelle. Diese enthält Rezeptoren für Glykoproteine, Asialoglykoprotein, Immunglobulin A (Ig A), vasoaktives intestinales Peptid (VIP), Insulin, Glukagon und „epidermal growth factor“ (EGF). Ein primär aktiver Transport erfolgt durch die Na+-K+-ATPase, die einen Ionengradienten an der Zellmembran aufbaut und innerhalb der Zelle ein negatives elektrisches Potenzial erzeugt (wodurch die Diffusion erleichtert wird). Dieser Ionengradient ermöglicht die Arbeit anderer Carrier gegen das Konzentrationsgefälle, z. B. von NTCP (Natrium-Taurocholsäure-Kotransport-Polypeptid), das auch für zahlreiche Medikamente, Östrogene und zyklische Oligopeptide spezifisch ist. Transporter für organische Anionen (OATP1) und anorganische Ionen wurden ebenfalls nachgewiesen.
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Deutsch, J., Huber, WD., Rodeck, B. (2013). Pathophysiologie der Leberkrankheiten. In: Rodeck, B., Zimmer, KP. (eds) Pädiatrische Gastroenterologie, Hepatologie und Ernährung. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24710-1_14
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