Collateral occurrence of deimination of keratins with differentiation of an immortalized newborn rat keratinocyte cell line cultured at air-liquid interface.
We devised a simple method to maintain an immortalized newborn rat keratinocyte cell line at the air-liquid interface using a tissue culture insert fitted with a microporous membrane. The cells formed stratified layers of flattened and anucleated cells resembling stratum corneum of the epidermis. Deiminated proteins, which are localized in the cornified layer of epidermis as the reaction products of peptidylarginine deiminase were detected immunohistochemically in the differentiated cells. Western blot analyses revealed that major deiminated proteins were type I keratins K10 and K14. Deiminated products of type II keratin K5 were found as minor components. Our observations show that deimination of keratins might be correlated with terminal differentiation of the immortalized keratinocyte cell line.
Ohsawa
T
T
Department of Cell Chemistry, Tokyo Metropolitan Institute of Gerontology, Japan.
Maruyama
I
I
Senshu
T
T
D000818:Animals; D000831:Animals, Newborn; D015153:Blotting, Western; D018929:Cell Culture Techniques / Q000379:methods; D002454:Cell Differentiation; D002460:Cell Line; D004591:Electrophoresis, Polyacrylamide Gel; D006867:Hydrolases / Q000378:metabolism*; D007150:Immunohistochemistry; D015603:Keratinocytes / Q000166:cytology / Q000378:metabolism*; D007633:Keratins / Q000378:metabolism*; D000080002:Protein-Arginine Deiminase Type 4; D000076342:Protein-Arginine Deiminases; D051381:Rats; D013997:Time Factors
D007633:Keratins; D006867:Hydrolases; D000080002:Protein-Arginine Deiminase Type 4; D000076342:Protein-Arginine Deiminases