Related Experiment Videos
Vitamin A uptake by human skin in vitro
Archives of Dermatological Research
|January 1, 1984
Summary
Human skin epidermis absorbs vitamin A from retinol-binding protein (RBP). This study demonstrates epidermal accumulation of vitamin A via RBP in an in vitro model.
Area of Science:
- Dermatology
- Biochemistry
- Cell Biology
Background:
- Vitamin A is essential for skin health.
- Retinol-binding protein (RBP) transports retinol (vitamin A) in the bloodstream.
- Understanding vitamin A delivery to skin is crucial for dermatological applications.
Purpose of the Study:
- To investigate the mechanism of vitamin A uptake by human skin.
- To determine if epidermis accumulates vitamin A from serum RBP.
- To develop an in vitro model for vitamin A delivery to skin.
Main Methods:
- Human breast skin explants were incubated with radiolabeled retinol-RBP.
- Tissue viability was confirmed by glucose oxidation.
- Epidermal and dermal uptake of [3H]-retinol was quantified using HPLC after separation.
Main Results:
- Epidermis exhibited a 6-7 times higher affinity for [3H]-retinol compared to dermis.
- Retinol uptake was saturable and specifically inhibited by unlabeled retinol-RBP.
- Dermis acted as a filter, reducing epidermal accumulation of retinol.
Conclusions:
- Human epidermis actively accumulates vitamin A delivered via RBP.
- An in vitro model simulating vitamin A delivery to skin was established.
- Findings provide insights into topical vitamin A delivery and skin metabolism.