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- W2059121517 abstract "Laser Doppler velocimetry (LDV) is a non-invasive technique that measures capillary blood perfusion parameters (blood flow, volume and velocity) and can be used non-invasively to evaluate the effects of ageing on cutaneous blood perfusion. Male Fischer-344 rats (R) of 1, 2, 3, 8, 12, 16, 20 and 24 months and C57BL/6N mice (M) 1, 2, 3, 9, 15, 19 and 22 months (n = 6/mo) were used. Animals were anesthetized with ketamine/xylazine and LDV-measured blood flow was made on the backs of all animals. Five readings for each parameter were recorded in order to obtain a mean value of the individual. Skin biopsies (4 mm) were removed after LDV for assessing epidermal and dermal thickness and number of epidermal cell layers. The number of viable epidermal layers in M remained constant while in R it decreased with age. Epidermal thickness in both M and R decreased from 2-3 months and then remained constant. Dermal thickness decreased from 3 to 22 months in M, and increased in R from 1 to 2 months and remained constant. Blood flow of M increased between 1 and 2 months, remained constant to 19 months, then increased at 22 months; flow in R was constant except at 2 months. Thus age differences in epidermal and dermal thickness, and blood flow of M and R occur and should be considered when evaluating cutaneous toxicity studies in different-aged animals. These changes may potentially alter dermal absorption and/or distribution of xenobiotics." @default.
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- W2059121517 date "1991-08-01" @default.
- W2059121517 modified "2023-10-16" @default.
- W2059121517 title "Laser Doppler measurements of cutaneous blood flow in ageing mice and rats" @default.
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- W2059121517 doi "https://doi.org/10.1016/0378-4274(91)90207-m" @default.
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