M. Boschmann et al., Microdialysis can detect age-related differences in glucose distribution within the dermis and subcutaneous adipose tissue, DERMATOLOGY, 202(3), 2001, pp. 207-210
Background: Intrinsic (chronological) cutaneous aging is a continuous and c
omplex process. Limitation in nutrient supply to the skin could contribute
to this process. Objective: Our study focused on the impact of age on gluco
se supply to human skin and its distribution within the dermis and subcutan
eous adipose tissue. Methods: An oral glucose load (100 g) was given to hea
lthy volunteers of two age groups (24 +/- 4 and 59 +/- 10 years, n = 4 for
each group). Dialysate concentrations of glucose and glycerol were monitore
d by microdialysis in the dermis and adipose tissue. Results: Baseline tiss
ue [glucose] did not differ significantly between the two groups. After the
glucose load, dialysate [glucose] of the dermis peaked between 60 and 80 m
in and between 80 and 120 min in the young and old groups, respectively. In
the old group, dialysate [glucose] was significantly higher in the dermis
than adipose tissue at 80, 100, 120, 160 and 180 min after the load. The su
m of the areas under the curve (dermis + adipose tissue) did not differ sig
nificantly between the two age groups. Conclusions: Aging is accompanied by
an increased diffusion barrier for glucose between the dermis and adipose
tissue. Copyright (C) 2001 S. Karger AG, Basel.