[Thioredoxin interacting protein in fibroblasts of human dermis in the process of aging.]

The aim of this work was to examine the content of thioredoxin interacting protein in fibroblasts of human dermis from the development until 85 years old, and defining of a role of thioredoxin interacting protein in age-dependent changes in the number of fibroblasts in the dermis. Thioredoxin interacting protein, proliferating cells nuclear antigen (PCNA), marker of fibroblasts vimentin were detected with indirect immunohistochemical technique. Results showed that portion of fibroblasts with positive staining for thioredoxin interacting protein in the dermis is increased from 20 weeks of pregnancy until 60 years old followed by a little decrease in age interval 61-85 years old. General number and percent of PCNA positive fibroblasts in dermis are decreased with age with more expressed changes until 40 years old. Correlation analysis showed that age dependent decrease in the number of fibroblasts and their proliferative activity is significantly associated with increase in thioredoxin interacting protein positive fibroblasts in dermis. Results obtained allow to suggest that thioredoxin interacting protein plays a role in age dependent decrease in the number of fibroblasts and their proliferation in human dermis.

[Thioredoxin-reductase in fibroblasts of human dermis in the process of aging.]

The aim of this work was to examine the content of thioredoxin-reductase in fibroblasts of human dermis from the development until deep aging (from 20 weeks of pregnancy until 85 years old), and defining of a role of thioredoxin-reductase in age-dependent changes in the number of fibroblasts in the dermis. Thioredoxin-reductase, proliferating cells nuclear antigen (PCNA), marker of fibroblasts vimentin were detected with indirect immunohistochemical technique. Results showed that portion of fibroblasts with positive staining for thioredoxin reductase in the dermis is increased from 20 weeks of pregnancy until 20 years old, is not changed from 21 to 60 years old, and is increased again from 61 to 85 years old. Most expressed age related increase in portion of thioredoxin-reductase positive dermal fibroblasts is present form birth until 20 years as compared to antenatal period. General number and percent of PCNA positive fibroblasts in dermis are decreased with age with more expressed changes until 40 years old. Correlation analysis showed that age dependent decrease in the number of fibroblasts and their proliferative activity is significantly associated with increase in thioredoxin-reductase positive fibroblasts in dermis. Results obtained allow to suggest that thioredoxin-reductase plays a role in age dependent decrease in the number of fibroblasts and their proliferation in human dermis.

[Thioredoxin in fibroblasts of human dermis in the process of aging.]

The aim of this work was to examine the content of thioredoxin in fibroblasts of human dermis from the development until deep aging (from 20 weeks of pregnancy until 85 years old), and defining of a role of thioredoxin in age-dependent changes in the number of fibroblasts in the dermis. Thioredoxin, proliferating cells nuclear antigen (PCNA), marker of fibroblasts vimentin were detected with indirect immunohistochemical technique. Results showed that portion of fibroblasts with positive staining for thioredoxin in the dermis is increased from 20 weeks of pregnancy until 85 years old. Most expressed age related increase in portion of thioredoxin positive dermal fibroblasts (more than 9 times) is present form birth until 20 years as compared to antenatal period. General number and percent of PCNA positive fibroblasts in dermis are decreased with age with more expressed changes until 40 years old. Correlation analysis showed that age dependent decrease in the number of fibroblasts and their proliferative activity is significantly associated with increase in thioredoxin positive fibroblasts in dermis. Results allow to suggest that thioredoxin play a role in age dependent decrease in the number of fibroblasts and their proliferation in human dermis.