Differential phosphorylation of mitogen-activated protein kinase families by epidermal growth factor and ultraviolet B irradiation in SV40-transformed human keratinocytes
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概要
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ELSEVIER, Nakamura, S; Takahashi, H; Kinouchi, M; Manabe, A; Ishida-Yamamoto, A; Hashimoto, Y; Iizuka, H, JOURNAL OF DERMATOLOGICAL SCIENCE, 25(2), 139-149, 2001.SV-40 transformed human keratinocytes (SVHK cells) were stimulated with epidermal growth factor (EGF)2 and ultraviolet B (UVB) irradiation. Following the stimulation, cell growth, apoptosis, and the activities of mitogen-activated protein (MAP) kinase families were analyzed. EGF (100ng/ml) increased SVHK cell number compared with control cells cultured in serum-free DMEM medium. The EGF-stimulated cells did not show DNA fragmentation. In contrast, UVB irradiation (40mJ/cm2) markedly decreased viable cell number, that was accompanied with DNA fragmentation. EGF stimulated extracellular signal-regulated kinase (ERK) and stress-activated protein kinase/c-Jun N-terminal kinase (JNK). Following the EGF stimulation, phosphorylated ERK and JNK were detected by phospho-p42/44 MAP kinase antibody and phospho-SAPK/JNK antibody, respectively. On the other hand, UVB irradiation stimulated the phosphorylation of p38 and JNK but not of ERK. The stimulation of ERK and JNK induced by EGF was observed earlier than the stimulation of p38 and JNK induced by UVB. PD98059, a specific MAP kinase kinase (MAPKK) 1 (also referred to as MEK1) inhibitor, inhibited EGF-dependent cell proliferation, that was associated with the inhibition of ERK and JNK phosphorylation. In contrast, UVB-induced overall cell death was not significantly affected by PD98059, that inhibited phosphorylation of JNK but not of p38. PD98059, however, significantly augmented UVB-induced cell death earlier time points (30min - 2 h). These results indicate that ERK and JNK are activated following EGF stimulation, that might be associated with cell proliferation. On the other hand, UVB-induced apoptosis seems to be mostly associated with the activation of p38. JNK stimulation might provide an anti-apoptotic tonus during the UVB-induced, p38-associated SVHK cell death.
- 2001-02-01
著者
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Iizuka Hajime
Department Of Dermatology Asahikawa Medical College
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Iizuka H
Department Of Applied Biological Science Faculty Of Science And Technology Science University Of Tok
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Hashimoto Yoshio
Department Of Dermatology Asahikawa Medical College
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Ishida Yamamoto
Department Of Dermatology Asahikawa Medical College
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KINOUCHI Motoshi
Department of Dermatology, Asahikawa Medical College
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Yamamoto A
Department Of Bacterial Pathogenesis And Infection Control National Institute Of Infectious Diseases
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Terao Hiroshi
Department Of Dermatology Graduate School Of Medical Sciences Kyushu University
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Nakamura Satoshi
Department Of Botany Graduate School Of Science Kyoto University
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Kinouchi Motoshi
Department Of Dermatology Asahikawa Medical College
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Hashimoto Y
Department Of Applied Biology Faculty Of Textile Science Kyoto Institute Of Technology
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Takahashi Hidetoshi
Department Of Dermatology Asahikawa Medical College
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Manabe Akira
Department Of Dermatology Asahikawa Medical College
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Hashimoto Yoshio
Department Of Dairy And Meat Science Faculty Of Agriculture Hokkaido University
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Nakamura Satoshi
Department Of Bioengineering Tokyo Institute Of Technology
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Nakamura Satoshi
Department Of Dermatology Asahikawa Medical College
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Hashimoto Yoshio
Department Of Anesthesiology University Of Hirosaki School Of Medicine
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Nakamura Satoshi
Department Of Acoustic And Speech Research Advance Telecommunications Research Institute International
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中村 哲史
Department of Dermatology, Asahikawa Medical College
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Nakamura S;
Department of Dermatology, Asahikawa Medical College
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Kinouchi M
Department of Dermatology, Asahikawa Medical College
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Manabe A
Department of Dermatology, Asahikawa Medical College
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