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The effect of sympathectomy on wool growth and catecholamine innervation of the skin in Wiltshire Horn sheep

Published online by Cambridge University Press:  27 March 2009

A. H. Williams  and
G. L. Willis
A. H. Williams
Affiliation:
Animal Research Institute, Department of Agriculture and Rural Affairs, Werribee, Victoria 3030, Australia
G. L. Willis
Affiliation:
Animal Research Institute, Department of Agriculture and Rural Affairs, Werribee, Victoria 3030, Australia
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Summary

Seven Wiltshire Horn rams were subjected to unilateral thoracic sympathectomy. Wool shedding was observed during the following 9 months. Fleece samples were collected on two occasions during winter from tattooed areas of skin on both the sympathectomized and unoperated sides. Skin samples were also taken from the sympathectomized and unoperated sides of the sheep during August and examined for catecholamine fluorescence using a fluorescence histochemical technique. While there was no difference in fleece casting between the sympathectomized and unoperated sides, there were increases in both wool growth and the number of brush end fibres on the sympathectomized side. Fluorescent histochemical evaluation of the skin samples revealed that the increases in shed fibres and wool growth were accompanied by a decrease in amine fluorescence in nonvascular tissue adjacent to the wool follicles.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 109 , Issue 2 , October 1987 , pp. 209 - 212
Copyright
Copyright © Cambridge University Press 1987

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References

Cunningham, A., Lambert, G. A. & Hales, J. R. S. (1979). Wool growth and adrenergie mechanisms in skin. Proceedings of the Australian Physiological and Pharmacological Society 10, 157P.Google Scholar
Edvinsson, L., Owman, C. & Sjöberg, N. (1976). Autonomic nerves, mast cells and amine receptors in human brain vessels. A histochemical and pharmacological study. Brain Research 5, 377–393.CrossRefGoogle Scholar
Ferguson, K. A. (1949). The effect of sympathectomy on wool growth. Australian Journal of Scientific Research B 2, 438–43.Google Scholar
Foldes, A. & Maxwell, C. A. (1981). Aspects of catecholamine involvement in wool growth and shedding. Proceedings of the 2nd National Wool Harvesting Research and Development Conference, Sydney, pp. 41–45.Google Scholar
Hökfelt, T., Jonsson, G. & Sachs, Ch. (1972). Fine structure and fluorescence morphology of adrenergie nerves after 6·hydroxydopamine in vivo and in vitro. Zeitschrift fur Zellforschung und Mikroskopische 131, 529–543.Google Scholar
Kishimoto, S., Marvo, M., Ohse, C., Yasuno, H., Kimura, H., Nagai, T. & Maeda, T. (1982). The regeneration of the sympathetic catecholaminergic nerve fibres in the process of burn wound healing in guinea pigs. Journal of Investigatory Dermatology 79, 141–146.CrossRefGoogle ScholarPubMed
Powell, J. A., Duell, E. A. & Vorrhees, J. J. (1971). Beta adrenergic stimulation of endogenous epidermal cyclic AMP formation. Archives of Dermatology 104, 359–365.Google Scholar
Roberts, W. J. & Levitt, G. R. (1982). Histochemical evidence for sympathetic innervation of hair receptor afferents in cat skin. Journal of Comparative Neurology 210, 204–209.Google Scholar
Ryder, M. L. (1971). Wool growth cycles in Soay sheep. Journal of Agricultural Science, Cambridge 76, 183–197.Google Scholar
Ryder, M. L. & Stephenson, S. K. (1968). Blood supply and wool growth. In Wool Growth, pp. 251–258. London: Academic Press.Google Scholar
Uno, H. & Parker, F. (1983). Autonomic innervation of the skin in primary erythermalgia. Archives of Dermatology 119, 65–71.CrossRefGoogle ScholarPubMed
Waris, T. & Kyosola, K. (1982 a). Adrenergic nerves and mast cells after skin freezing. A hypothesis based on fluorescence microscope observation in the rat. Experientia 38, 1462–1468.Google Scholar
Waris, T. & Kyosola, K. (1982 b). Cold injury of the rat skin. Scandinavian Journal of Plastic Reconstructive Surgery 16, 1–9.CrossRefGoogle ScholarPubMed
Willis, G., Singer, G. & Evans, B. (1976). Intracranial injections of 6-OHDA: comparison of catecholaminedepleting effects of different volumes and concentrations. Pharmacology, Biochemistry and Behavior 5, 207–213.CrossRefGoogle ScholarPubMed