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A variation of pigmentation in the glabrous skin of dogs

Elofsson, Rolf LU and Kröger, Ronald H.H. LU (2018) In Journal of Morphology 279(8). p.1194-1198
Abstract

The usual pigmentation pattern in mammalian skin consists of fixed melanocytes in the basal layer of the epidermis, supplying keratinocytes with melanosomes. We observed that the glabrous skin (rhinaria and footpads) of dogs deviates from this pattern. In dogs, melanocytes are found in both the dermis and epidermis. The epidermal melanocytes are situated in the intercellular spaces of the basal and spinous layers. They are characterized by a quantity of cytoplasm containing a centriole, also developing melanosomes, and in some cases annulate lamellae. There is a high frequency of closely apposed melanocytes in the epidermis. Melanosomes in different stages of formation are also abundant. The morphology of the glabrous skin of dogs... (More)

The usual pigmentation pattern in mammalian skin consists of fixed melanocytes in the basal layer of the epidermis, supplying keratinocytes with melanosomes. We observed that the glabrous skin (rhinaria and footpads) of dogs deviates from this pattern. In dogs, melanocytes are found in both the dermis and epidermis. The epidermal melanocytes are situated in the intercellular spaces of the basal and spinous layers. They are characterized by a quantity of cytoplasm containing a centriole, also developing melanosomes, and in some cases annulate lamellae. There is a high frequency of closely apposed melanocytes in the epidermis. Melanosomes in different stages of formation are also abundant. The morphology of the glabrous skin of dogs suggests transport of melanocytes from the dermis into the epidermis and formation of melanosomes in the epidermis. A distributed and intense pigment formation may be necessary to achieve the black noses of many dog breeds and wild canids, as well as dark footpads despite heavy abrasion and rapid skin renewal.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
dogs, glabrous skin, melanocytes
in
Journal of Morphology
volume
279
issue
8
pages
5 pages
publisher
John Wiley & Sons
external identifiers
  • scopus:85053600517
ISSN
0362-2525
DOI
10.1002/jmor.20842
language
English
LU publication?
yes
id
d9dedcd0-a7ab-4b23-8d53-d3b1632e254a
date added to LUP
2018-10-17 15:18:07
date last changed
2019-02-20 11:31:50
@article{d9dedcd0-a7ab-4b23-8d53-d3b1632e254a,
  abstract     = {<p>The usual pigmentation pattern in mammalian skin consists of fixed melanocytes in the basal layer of the epidermis, supplying keratinocytes with melanosomes. We observed that the glabrous skin (rhinaria and footpads) of dogs deviates from this pattern. In dogs, melanocytes are found in both the dermis and epidermis. The epidermal melanocytes are situated in the intercellular spaces of the basal and spinous layers. They are characterized by a quantity of cytoplasm containing a centriole, also developing melanosomes, and in some cases annulate lamellae. There is a high frequency of closely apposed melanocytes in the epidermis. Melanosomes in different stages of formation are also abundant. The morphology of the glabrous skin of dogs suggests transport of melanocytes from the dermis into the epidermis and formation of melanosomes in the epidermis. A distributed and intense pigment formation may be necessary to achieve the black noses of many dog breeds and wild canids, as well as dark footpads despite heavy abrasion and rapid skin renewal.</p>},
  author       = {Elofsson, Rolf and Kröger, Ronald H.H.},
  issn         = {0362-2525},
  keyword      = {dogs,glabrous skin,melanocytes},
  language     = {eng},
  number       = {8},
  pages        = {1194--1198},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Morphology},
  title        = {A variation of pigmentation in the glabrous skin of dogs},
  url          = {http://dx.doi.org/10.1002/jmor.20842},
  volume       = {279},
  year         = {2018},
}