Hormone-Induced Dispersion or Aggregation of Carotenoid-Containing Smooth Endoplasmic Reticulum in Cultured Xanthophores from the Goldfish,Carrassius AuratusL. [1]

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Abstract
A novel organelle movement is described in goldfish xantho-phores. smooth endoplasmic reticulum, containing carotenoids pigments, undergo MSH or c-AMP-induced dispersion. This dispersion is independent of RNA and protein synthesis, not modulated by c-GMP and inhibited by cytochalasin B but only at the relatively high concentration of 10 ug/ml. Epinephrine induces aggregation, a process that is inhibited by colchicine. These results suggest, but do not prove, the involvement of microfilaments in dispersion and microtubules in the aggregation of carotenoid-containing endoplasmic reticulum.