Summary
A simple method to isolate and culture liver pigment cells fromRana esculenta L. is described which utilizes a pronase digestion of perfused liver, followed by sedimentation on a Ficoll gradient. A first characterization of isolated and cultured cells is also reported. They show both positivity for nonspecific esterases, and phagocytosis ability, like the cells of phagocytic lineage. Furthermore, after stimulation with a phorbol ester, these cells generate superoxide anions. At phase contrast microscope, liver pigment cells present variability in size, morphology, and in their content of dark-brown granules. Inasmuch as a cell extract obtained from cultured cells exhibits a specific protein band with dopa-oxidase activity, when run on nondenaturing polyacrylamide gel electrophoresis, liver pigment cells fromRana esculenta L. should not be considered as melanophages, but as cells that can actively synthesize melanin. The method presented here seems to be useful to more directly investigate this extra-cutaneous melanin-containing cell system and to clarify its physiologic relevance.
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This research was partly supported by grant of Ministero della Pubblica Istruzione, Ricerca Scientifica.
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Pintucci, G., Manzionna, M.M., Maida, I. et al. Morpho-functional characterization of cultured pigment cells fromRana esculenta L. Liver. In Vitro Cell Dev Biol 26, 659–664 (1990). https://doi.org/10.1007/BF02624421
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DOI: https://doi.org/10.1007/BF02624421