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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Medrano, E. E. Akadiri, B. Farooqui, J. Z. Boissy, Y. L. Nordlund, J. J. Boissy, R. E. |
| Description | Author Affiliation: Medrano EE ( Department of Dermatology, University of Cincinnati College of Medicine, OH 45267-0592.); |
| Abstract | In the human epidermis, melanocytes are distributed at a distance from each other. In contrast, melanocytes in nevi, which are considered benign neoplasms of melanocytes, are grouped in nests. Although still not well defined, environmental factors are thought to play an important role in the development of nevi. We found that chronic growth stimulation by leukotriene C4, a compound found in increased amounts in inflamed skin, induced pleiotropic modifications in the normal melanocyte phenotype. These changes include loss of contact inhibition and formation of structures resembling tumor spheroids. In parallel with these changes, there was a constitutive expression of Fos protein. Switching these cultures to medium supplemented with phorbol ester sustained growth with reversion of the altered phenotype. In contrast, a cAMP stimulator, cholera toxin, induced features of terminal differentiation. Our findings suggest a role for inflammatory mediators in human epidermal melanocytes. This observation provides insight into melanocyte growth alterations which may have relevance in early stages of melanocyte oncogenesis. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 5 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cell Division Drug Effects Melanocytes Cytology Pharmacology Cell Differentiation Cyclic AMP Metabolism Epidermis Genes, Fos In Vitro Techniques Melanins Monophenol Monooxygenase Nevus Pathology Proto-Oncogene Proteins C-fos Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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