Reticuloendothelial system Kupffer cell uptake (RES Kupffer cell uptake (not a standard abbreviation, but "RES" is used))

The **reticuloendothelial system (RES)** is a network of phagocytic cells, chiefly macrophages derived from monocytes, distributed throughout the body in organs such as the liver (Kupffer cells), spleen, bone marrow, and lymph nodes. In the liver, Kupffer cells are specialized macrophages lining the hepatic sinusoids and are the primary cell type responsible for the rapid removal of particles, pathogens, and debris from the blood by phagocytosis and endocytosis[1][3][4][6]. Kupffer cell uptake refers to the process by which these liver macrophages internalize and degrade foreign materials, drugs, nanoparticles, and dying cells. This process is crucial for innate immune defense and homeostasis but also presents a major barrier to drug delivery, especially for nanomedicines and particulate therapeutics, which may be rapidly removed from circulation, reducing their effectiveness. Kupffer cell activation is implicated in liver inflammation, infection response, and disease processes such as fibrosis and cancer[1][2][3][5]. **Note:** The entry "Reticuloendothelial system/Kupffer cell uptake" represents a functional process, not a singular molecular target. For therapeutic targeting or drug delivery purposes, it may be necessary to identify and specify molecular mediators (such as receptors or scavenger proteins) involved in uptake, like the complement receptor of the immunoglobulin family (CRIg) on Kupffer cells[1].

Other names

RES uptakeKupffer cell uptakereticuloendothelial uptakehepatic macrophage uptake

Uptake and rapid clearance of particles or drugs by phagocytosis mediated mainly by Kupffer cells and other macrophages in the RES[3][1]