Purification of Black Moor Goldfish melanophores and responses to epinephrine |
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Authors: | Carl R Clark John D Taylor T T Tchen |
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Institution: | (1) Departments of Chemistry and Biological Sciences, Wayne State University, 48202 Detroit, Michigan;(2) Department of Internal Medicine, Wayne State University Medical School, 48201 Detroit, MI |
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Abstract: | Summary Two key modifications of the previously reported method for isolation of goldfish xanthophores allowed the isolation and establishment
of primary cultures of terminally differentiated melanophores from the Black Moor goldfish (Carassius auratus). First, pretreatment with 10−4
M epinephrine causing aggregation of the melanosomes and collapse of the dendrites, prevents damage to the melanophores during
tissue dissociation and melanophore isolation. Second, maintenance of these cells in culture was successful only when the
culture medium was supplemented with fish serum. The purified melanophores attached, flattened, and were maintained in culture
for up to 3 mo. Although the morphology of the cultured melanophores is less dendritic than their in vivo counterparts, the
melanophores translocate melanosomes in a normal manner except that they exhibit enhanced sensitivity to epinephrine. This
epinephrine-induced pigment aggregation, as well as the redispersion of pigment after the removal of epinephrine, can occur
in the presence of ethylene glycol-bis (β-aminoethyl ether)-N, N, N′, N′-tetraacetic acid and absence of Ca2+.
This work was supported by grant AM13724 from the National Institutes of Health, Bethesda, MD. |
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Keywords: | melanophores isolation goldfish culture epinephrine translocation |
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