Cellular dynamics of the outer layers of the hair follicle of fine-wool sheep during the phase of stable hair growth

Cellular dynamics of the outer layers of the hair follicle of fine-wool sheep during the phase of... The structure, origin, and migration of outer sheath cells of the hair follicles of domestic sheep were studied by electron microscopic, autoradiographic, and histochemical (glycogen) methods in order to understand the role of this layer in hair morphogenesis. We demonstrated that the cells of the outer layers of the outer sheath interpose into the inner “companion” layer of the outer sheath. Although this process takes place all along the hair follicle from the lower bulb up to the sebaceous glands orifices, it mainly takes place over the bulb. Labeled cells interposed into the companion layer reach sebaceous glands orifices more than 24 h faster than labeled cells of the inner sheath and hair, because these cells included the label not in the bulb cambium (as hair and inner sheath) but over the bulb, and from this point they start movement. Interposition of cells into the companion layer must cause increase of its volume and additional volume supposed to be led away into the pillar canal around the hair near the sebaceous glands orifices. This can provide the mechanism of the hair and inner sheath promotion to sebaceous gland orifices. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Cellular dynamics of the outer layers of the hair follicle of fine-wool sheep during the phase of stable hair growth

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Pleiades Publishing
Copyright © 2014 by Pleiades Publishing, Inc.
Life Sciences; Developmental Biology; Animal Anatomy / Morphology / Histology
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