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In vitro studies of the influence of prolactin on tail regeneration in the adult newtNotophthalmus viridescens

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In vitro experiments were carried out to determine the effects of prolactin, and prolactin in combination with other hormones on the regeneration of adult newt tail blastemata. A total of 271 blastemata were explanted 13 days postamputation and were organ cultured for 96 h at 20 (±1)°C. Treatment with prolactin alone resulted in an increase in the blastema cell density of the tail regenerates. Cell accumulation and cell alignment were observed ventral to the reconstituted spinal cord. Prolactin and thyroxine, in combination, improved development of tail regenerates as compared with treatment with prolactin or thyroxine singly, supporting the results of earlier in vivo studies. Optimal development was obtained only when prolactin, insulin, thyroxine and hydrocortisone were added to the culture medium. Regeneration of tail explants maintained in medium augmented with the four hormones closely resembles that of in vivo tail blastemata 17 days post-amputation.

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Correspondence to Richard A. Liversage.

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Supported by grant A-1208 from the Natural Sciences and Engineering Research Council of Canada to R.A.L.

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Liversage, R.A., Stewart, W.E. & McLaughlin, D.S. In vitro studies of the influence of prolactin on tail regeneration in the adult newtNotophthalmus viridescens . Wilhelm Roux' Archiv 193, 379–387 (1984). https://doi.org/10.1007/BF00848228

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Key words

  • Regeneration
  • Prolactin
  • Organ culture
  • Adult newt