Dimethylaminoethanol affects the viability of human cultured fibroblasts

Effects of dimethylaminoethanol and compound amino acid on D-galactose induced skin aging model of rat

A lasting dream of human beings is to reverse or postpone aging. In this study, dimethylaminoethanol (DMAE) and compound amino acid (AA) in Mesotherapy were investigated for their potential antiaging effects on D-galactose induced aging skin. At 18 days after D-gal induction, each rat was treated with intradermal microinjection of saline, AA, 0.1% DMAE, 0.2% DMAE, 0.1% DMAE + AA, or 0.2% DMAE + AA, respectively. At 42 days after treatment, the skin wound was harvested and assayed. Measurement of epidermal and dermal thickness in 0.1% DMAE + AA and 0.2% DMAE + AA groups appeared significantly thicker than aging control rats. No differences were found in tissue water content among groups. Hydroxyproline in 0.1% DMAE + AA, 0.2% DMAE + AA, and sham control groups was much higher than all other groups. Collagen type I, type III, and MMP-1 expression was highly upregulated in both 0.1% DMAE + AA and 0.2% DMAE + AA groups compared with aging control. In contrast, TIMP-1 expression levels of various aging groups were significantly reduced when compared to sham control. Coinjection of DMAE and AA into target tissue has marked antiaging effects on D-galactose induced skin aging model of rat.

Autologous fibroblast culture in the repair of aging skin

BACKGROUND

Human cell cultures are being developed to replace various body tissues.

OBJECTIVE

To assess the safety and efficacy of dermal regeneration with the injection of young autologous fibroblasts obtained from culture containing serum from patients themselves.

MATERIALS AND METHODS

Dermal tissue from the groin of five patients was cultivated in M199 medium supplemented with 10% human serum. Four population doublings were obtained. The fibroblasts were injected intradermally into forehead wrinkles and periorbital and paranasal areas.

RESULT

At the fourth population doubling, a mean of 3.85 × 10(6) cells/mL was obtained; viability was 98%. Sixty days after completing treatment, with four injections given at 15-day intervals, periorbital tonicity had improved significantly, although the quantity of fibroblasts used resulted in little improvement to surface lines and no improvement at all in deeper wrinkles. After 6 months, no further changes were found beyond the initial results obtained.

CONCLUSION

Injection of skin fibroblasts cultivated in medium supplemented with human serum is a viable technique and provokes no side effects. Four injections given at 15-day intervals containing a total of 6.4 × 10(6) fibroblasts/mL resulted in significant improvement in periorbital skin flaccidity. Further studies should be conducted with larger sample sizes.

In vitro effect of 470 nm LED (Light Emitting Diode) in keloid fibroblasts

PURPOSE

To quantify keloid fibroblasts after irradiation with 470nm blue LED, in vitro.

METHODS

Fibroblasts from keloid and adjacent skin have been obtained from 6 patients. Cells have been cultivated and maintained in DMEM culture medium. In Petri dishes, they were irradiated with energy doses of 6J, 12J and 18J. After 24 h, counting was done by the average of the triplicates for each sample.

RESULTS

There were no significant differences in the number of irradiated keloid fibroblasts at the studied doses (p=0.261). In adjacent skin fibroblasts, differences were observed (p=0.025) concerning the doses of 18 J and 6 J (p=0.03).

CONCLUSIONS

There was a reduction in the number of adjacent skin fibroblasts irradiated with 470nm blue LED at the energy dose of 18 J compared to the ones irradiated at the energy dose of 6 J. There were no changes in keloid fibroblasts counting at any of the doses applied, 24 h after irradiation.