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  • Title: Cell proliferation of epidermis, hair follicles, and sebaceous glands of beagles and cocker spaniels with healthy skin.
    Author: Kwochka KW, Rademakers AM.
    Journal: Am J Vet Res; 1989 Apr; 50(4):587-91. PubMed ID: 2712428.
    Abstract:
    Cell proliferation kinetic values were established for the epidermis, hair follicle epithelium, and sebaceous glands of 10 Beagles and 4 Cocker Spaniels with healthy skin and coats. Values were established by intradermal pulse-labeling injections of [3H]thymidine, examination of cutaneous biopsied tissues, and autoradiography. The epidermal basal cell-labeling index was 1.41 +/- 0.46% for Beagles and 1.71 +/- 0.56% for Cocker Spaniels. The hair follicle basal cell-labeling index was 1.46 +/- 0.78 and 1.07 +/- 0.42%, respectively. Calculated epidermal cell-renewal time for viable layers of the epidermis was 23.38 +/- 5.93 days for Beagles and 20.97 +/- 4.92 days for Cocker Spaniels. Differences between cell kinetic data for the 2 breeds were not significant (P greater than 0.05). The basal cell-labeling index for the sebaceous gland was significantly (P = 0.009) lower for Cocker Spaniels (0.40 +/- 0.18%) than for Beagles (1.81 +/- 1.08%). Seemingly, epidermal and follicular cell proliferation kinetics in healthy dogs was similar between the 2 breeds, whereas sebaceous gland basal cells were less proliferative in healthy Cocker Spaniels than in healthy Beagles.
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