Novel synthetic ceramide derivatives increase intracellular calcium levels and promote epidermal keratinocyte differentiation

Ceramide is an important constituent of stratum corneum lipids, which act as both physical barriers and signal modulators. We synthesized several ceramide derivatives and investigated their effects on keratinocyte differentiation. RT-PCR and Western blotting showed that the novel synthetic ceramide...

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Bibliographic Details
Published in:Journal of lipid research 2007-09, Vol.48 (9), p.1936-1943
Main Authors: Kwon, Yoo Bin, Kim, Chang Deok, Youm, Jong-Kyung, Gwak, Hyung Sub, Park, Byeong Deog, Lee, Seung Hun, Jeon, Saewha, Kim, Bo Joong, Seo, Young-Joon, Park, Jang-Kyu, Lee, Jeung-Hoon
Format: Article
Language:English
Subjects:
Calcium - metabolism
Cell Differentiation - drug effects
Cells, Cultured
Ceramides - pharmacology
Humans
Infant, Newborn
intracellular calcium level
K6PC-4
K6PC-5
K6PC-9
keratin 1
Keratinocytes - cytology
Keratinocytes - drug effects
Keratinocytes - metabolism
mitogen-activated protein kinase
Mitogen-Activated Protein Kinase 1 - metabolism
Mitogen-Activated Protein Kinase 3 - metabolism
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Summary:Ceramide is an important constituent of stratum corneum lipids, which act as both physical barriers and signal modulators. We synthesized several ceramide derivatives and investigated their effects on keratinocyte differentiation. RT-PCR and Western blotting showed that the novel synthetic ceramide derivatives K6PC-4 (N-ethanol-2-hexyl-3-hydroxy-decanamide), K6PC-5, (N-ethanol-3-oxo-2-tetradecyl/hexadecyl-octadecanamide/eicosanamide)and K6PC-9 [N-(1,3-dihydroxypropyl)-2-hexyl-3-oxo-decanamide] markedly increased keratin 1 and involucrin expression in normal human epidermal keratinocytes cultured in vitro. These ceramide derivatives elicited a rapid transient increase in intracellular calcium levels, which were measured using laser scanning confocal microscopy. In addition, K6PC-4, K6PC-5, and K6PC-9 stimulated the phosphorylation of p42/44 extracellular signal-regulated kinase and c-Jun N-terminal kinase. In a reconstituted epidermis model, K6PC-4, K6PC-5, and K6PC-9 significantly increased keratin 1 expression in the suprabasal layer. These results indicate that these novel synthetic ceramide derivatives have the potential to promote keratinocyte differentiation, suggesting that the lipid molecules are applicable for treating skin diseases involving abnormal keratinocyte differentiation.
ISSN:0022-2275
1539-7262
DOI:10.1194/jlr.M700185-JLR200