Histological observations on the changes in thyroid activity in the scincid lizard, Mabuya striata, during different phases of tail regeneration

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dc.contributor.authorMagon, D.K.
dc.date.accessioned2015-03-18T12:25:54Z
dc.date.available2015-03-18T12:25:54Z
dc.date.issued1977
dc.description.abstractMeasurements of the follicle cells of the thyroid during different phases of regeneration of the tail in the scincid lizard. Mabuya striata. indicate a decrease in thyroid activity during the wound-healing phase and an increase at the end of the blastema phase. The significance of endocrine secretion of the thyroid has drawn the attention of a number of developmental biologists as the hormone thyroxine brings about various physiological changes during anuran metamorphosis. The regenerative power of these amphibians gradually diminishes as metamorphosis advances. It may be absent in the fully metamorphosed animals (Rose 1964), or sometimes restricted to wound healing or to the formation of a hypermorphic cartiJaginous spike (Richards et oJ. 1975). Further, PawlowskJ (1933), Peadorr (1953) and Schotte & Washburn (1954) showed that thyroidectomy, treatment with thiourea, or increased doses of thyroxine hinder amphibian regeneration. Nevertheless, Tassava (1969) and Bromley & Thornton (1974) presented data indicating that prolactin when present with thyroxine promotes limb regeneration. Thus these reports suggest some possible relationship of thyroxine to metamorphic changes and capacity for regeneration in the amphibians. However, the role of thyroxine and other thyroid secretions in regeneration of reptiles is still unknown. The following communication describes an attempt to examine histological differences in the thyroid activity in the normal scincid lizard, Mabuya striata. and those showing different stages of tail regeneration, with a view to assessing the role of thyroid secretion in the regenerative processes of this reptileen_US
dc.identifier.citationAfrican Zoology Volume 12 Issue 2, Pages 389-392en_US
dc.identifier.issn00445096
dc.identifier.urihttp://reference.sabinet.co.za/webx/access/journal_archive/00445096/2077.pdf
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/12389
dc.language.isoenen_US
dc.publisherZoological Society of Southern Africaen_US
dc.subjectEndocrine secretionen_US
dc.subjectHormone thyroxineen_US
dc.subjectAnuran metamorphosisen_US
dc.subjectHypermorphic cartilaginous spikeen_US
dc.subjectProlactinen_US
dc.subjectEpithelial cells of follicleen_US
dc.subjectGrowth phasesen_US
dc.subjectMetabolic activitiesen_US
dc.subjectHyperthyroidismen_US
dc.subjectWound-healingen_US
dc.titleHistological observations on the changes in thyroid activity in the scincid lizard, Mabuya striata, during different phases of tail regenerationen_US
dc.typeArticleen_US
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