In vitro percutaneous absorption in mouse skin: influence of skin appendages

Journal Article · Wed Jun 15 04:00:00 EDT 1988 · Toxicol. Appl. Pharmacol.; (United States)

DOI:https://doi.org/10.1016/0041-008X(88)90340-7· OSTI ID:6855982

Kao, J; Hall, J; Helman, G

Skin appendages are often envisaged as channels that bypass the stratum corneum barrier and are generally thought to facilitate the dermal absorption of topical agents. However, the significance of this transappendageal pathway in percutaneous absorption remains to be assessed experimentally. With the use of a skin organ culture penetration chamber system, the influence of skin appendages on the in vitro permeation of topically applied benzo(a)pyrene and testosterone (5 micrograms/2 cm2) was examined in skin preparations from both haired and hairless mice. Haired mice examined included the C57BL6, C3H, DBA2, Balbc, and Sencar strains and the hairless mice were the HRS and SKH. In all mouse strains examined, the overall permeation of testosterone (greater than 65% of applied dose) 16 hr following in vitro topical application was greater than that of benzo(a)pyrene (less than 10%). No strain differences were observed with respect to the percutaneous permeation of testosterone; however, percutaneous permeation of benzo(a)pyrene in the haired mice (7-10% of applied dose) was higher than that in the hairless mice (2%). In an in-house derived mouse strain which showed three phenotypic variants due to hair densities, the permeability to both compounds was highest in the skin of the haired phenotype (testosterone 67%, benzo(a)pyrene 7%), lowest in the hairless phenotype (35 and 1%, respectively) and intermediate in the fuzzy-haired animal (57 and 3%, respectively). Examination by fluorescence microscopy of cryosections of skin, prepared 1 hr after topical benzo(a)pyrene, showed areas of intense fluorescence deep within the nonfluorescing dermis of skin from the haired phenotype. These fluorescent areas were correlated with follicular ducts and sebaceous glands.

• Research Organization: Smith Kline and French Laboratories, King of Prussia, PA (USA)
• OSTI ID: 6855982
• Journal Information: Toxicol. Appl. Pharmacol.; (United States), Journal Name: Toxicol. Appl. Pharmacol.; (United States) Vol. 94:1; ISSN TXAPA
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ANDROGENS
ANDROSTANES
ANIMALS
AROMATICS
BENZOPYRENE
BIOLOGICAL VARIABILITY
BODY
CONDENSED AROMATICS
FLUORESCENCE
GENETIC VARIABILITY
HAIR
HORMONES
HYDROCARBONS
HYDROXY COMPOUNDS
IN VITRO
KETONES
LUMINESCENCE
MAMMALS
MICE
ORGANIC COMPOUNDS
ORGANS
PERMEABILITY
PHENOTYPE
RODENTS
SKIN
SKIN ABSORPTION
STEROID HORMONES
STEROIDS
TESTOSTERONE
UPTAKE
VERTEBRATES