Ultrastructural and functional study of the liver pigment cells from Rana esculenta L.

摘要: A study of the liver pigment cells Rana esculenta L. has been performed on both in toto and culture. Ultrastructural cytochemical analyses showed a close relationship between this visceral cell system hepatic macrophage lineage. Like latter, present phagocytic activity, sinusoids vitro, give positive response to tests for peroxidase lipase. The are isolated, together with Kupffer cells, from sinusoidal fraction liver. In culture, they maintain their melanogenetic ability, demonstrated by presence dopaoxidase activity soluble, membranous, melanosome fractions. Analysis cultures that as culture time increased, so did number pigmented fields, level pigmentation cells. values show same seasonal oscillations toto, indicating an internal clock, at least first 72 h There is evidence macrophages which can express function. Our results other experimental data provide basis hypothesizing may derive from, or have common origin with,