Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest.

Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest. Research Abstract Details 

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Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest. Abstract Text:

Dong-Seok Kim,Hyun-Kyung Lee,Seo-Hyoung Park,Sangku Lee,In-Ja Ryoo,Won-Gon Kim,Ick-Dong Yoo,Jung-Im Na,Sun-Bang Kwon,Kyoung-Chan Park,

Terrein, a fungal metabolite, has been recently shown to have a strong antiproliferative effect on skin equivalents. In the present study, we further investigated the effects of terrein on the possible signalling pathways involved in the growth inhibition of human epidermal keratinocytes by examining the regulations of extracellular signal-regulated protein kinase (ERK) and of the Akt pathway by terrein. It was observed that ERK was inactivated by terrein and that keratinocyte proliferation was inhibited, whereas Akt was unaffected. The inhibition of the ERK pathway by U0126 (a specific ERK inhibitor) also had a dose-dependent antiproliferative effect on human keratinocytes. These results indicate that ERK inhibition is involved in keratinocyte growth inhibition by terrein. Moreover, flow cytometric analysis showed that terrein inhibits DNA synthesis, as evidenced by a reduction in the S phase and an increase in the G2/M phase of the cell cycle. Thus, we next examined changes in the expressions of G2/M cell cycle-related proteins. Terrein was found to downregulate cyclin B1 and Cdc2 without Cdc2 phosphorylation, but upregulated p27(KIP1) (p27), a known inhibitor of cyclin-dependent kinase. These results suggest that terrein reduces human keratinocyte proliferation by inhibiting ERK and by decreasing the expressions of cyclin B1 and Cdc2 complex.

Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest. Publishing Authors By Initials

DS Kim,HK Lee,SH Park,S Lee,IJ Ryoo,WG Kim,ID Yoo,JI Na,SB Kwon,KC Park,

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Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Experimental dermatology

VOLUME: 17

Page Numbers: 312-7

Journal Abbreviation: Exp. Dermatol.

ISSN: 1600-0625

DAY: 2

MONTH: 11

YEAR: 2007

Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Terrein inhibits keratinocyte proliferation via ERK inactivation and G2/M cell cycle arrest.

AFFILIATION: Department of Biochemistry, College of Medicine, Chung-Ang University, Republic of Korea.

Country: Denmark

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MEDLINETA: Exp Dermatol

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