Related Experiment Videos
Localization of adducin in epidermis
H W Kaiser1, W Ness, E O'Keefe
1Department of Dermatology, University Bonn, Germany.
The Journal of Investigative Dermatology
|December 1, 1993
Summary
Adducin, a protein crucial for red blood cell shape, is found in human epidermis. This discovery suggests adducin plays a role in cell-cell adhesion and the structural matrix within skin cells.
Area of Science:
- Cell Biology
- Dermatology
- Biochemistry
Background:
- Erythrocytes possess a protein filament matrix, including actin and spectrin, essential for cell shape maintenance.
- Adducin links actin and spectrin in erythrocytes, with its function regulated by calmodulin and protein kinase C.
- Previous findings indicated adducin presence in cultured keratinocytes.
Purpose of the Study:
- To investigate the presence and localization of adducin in human epidermis.
- To determine if adducin's role in keratinocytes mirrors its function in erythrocytes.
Main Methods:
- Immunochemical techniques, including immunofluorescence and immunoblot analysis.
- Affinity-purified antibodies against human erythrocyte adducin were used.
- Epidermis and cultured human keratinocytes were analyzed.
Main Results:
- Adducin was localized at cell-cell contact sites in human epidermis and cultured keratinocytes.
- Immunofluorescence showed intense staining in the basal layer of epidermis and at keratinocyte contacts.
- Immunoblot analysis detected adducin polypeptides (103 kd and 97 kd) in epidermis, with only the 103 kd form in cultured keratinocytes.
Conclusions:
- Adducin is present in human epidermis, similar to its presence in erythrocytes.
- Adducin's localization at cell-cell contacts suggests a role in the epidermal microfilament matrix.
- The findings indicate adducin may be involved in maintaining skin cell structure and adhesion.