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The four-and-a-half-LIM protein 2 (FHL2) is overexpressed in gliomas and associated with oncogenic activities

✍ Scribed by Ming Li; Jide Wang; Samuel S. M. Ng; Chu-Yan Chan; Amy C. Chen; Hong Ping Xia; David T. Yew; Benjamin C. Y. Wong; Zhu Chen; Hsiang-Fu Kung; Marie Chia-Mi Lin

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
883 KB
Volume
56
Category
Article
ISSN
0894-1491

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✦ Synopsis

Abstract

Four‐and‐a‐half‐LIM protein 2 (FHL2) is a member of FHL protein family, which plays a crucial role in regulating gene expression, cell survival, and migration. Although its function in oncogenesis appears to be tumor type‐specific, its roles in glioma formation and development are yet to be elucidated. In the present study, we demonstrated that the mRNA level of FHL2 was elevated in both low‐ and high‐grade glioma samples. Overexpression of FHL2 stimulated the proliferation, anchorage‐independent growth, and migration of human glioblastoma cells. Conversely, FHL2 knockdown by short hairpin RNA (shRNA‐FHL2) inhibited glioblastoma cell proliferation and migration. Overexpression of FHL2 increased the tumorigenicity of glioblastoma cells in nude mice and decreased the mRNA levels of p53 and its downstream proapoptotic genes, including p21, Bcl2‐associated protein X (Bax), and p53‐upregulated modulator of apoptosis. It also enhanced the promoter activities of activator protein‐1 (AP‐1), human telomerase reverse transcriptase, and survivin genes. Together, these results provide the first evidence that FHL2 contributes to glioma carcinogenesis. © 2008 Wiley‐Liss, Inc.

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