[Changes in the number of p23-positive fibroblasts in human dermis with aging.]

The aim of this work was to examine the content of p23 in fibroblasts of human dermis from 20 weeks of pregnancy until 85 years old, and defining of a role of p23 in age-dependent changes in the number and proliferation of fibroblasts in the dermis. p23, proliferating cells nuclear antigen (PCNA), fibroblasts marker vimentin were detected with indirect immunohistochemical technique. Results showed that portion of fibroblasts with positive staining for p23 in the dermis is gradually increased from 20 weeks of pregnancy until 85 years old. Age-related increase in a portion of fibroblasts with positive staining for p23 is significantly correlated with an age-related decrease in total number and percent of PCNA positive fibroblasts in human dermis. Age-related increase in the content of p23 in fibroblasts is involved in an age-dependent decrease in their total number and proliferation in the dermis.