[Ultrastructural study of transepithelial pinocytosis induced by endotoxin in the distal section of the nephron].

In initial and intermediate periods of endotoxin shock in rats and dogs significant micropinocytosis in the epithelial cells of distal tubules and collecting ducts are observed. On the stage of late endotoxemia in rats transepithelial pinocytosis disappears. Existence of correlative connections between ultrastructural changes in neurosecretory system and epithelial cells responsible for facultative reabsorption in different periods of experimental endotoxemia have been shown.