Isolation of a novel human gene, MARKL1, homologous to MARK3 and its involvement in hepatocellular carcinogenesis.

Abstract:

:Activation of the Wnt-signaling pathway is known to play a crucial role in carcinogenesis of various human organs including the colon, liver, prostate, and endometrium. To investigate the mechanisms underlying hepatocellular carcinogenesis, we attempted to identify genes regulated by beta-catenin/Tcf complex in a human hepatoma cell line, HepG2, in which an activated form of beta-catenin is expressed. By means of cDNA microarray, we isolated a novel human gene, termed MARKL1 (MAP/microtubule affinity-regulating kinase-like 1), whose expression was downregulated in response to decreased Tcf/LEF1 activity. The transcript expressed in liver consisted of 3529 nucleotides that contained an open reading frame of 2256 nucleotides, encoding 752 amino acids homologous to human MARK3 (MAP/microtubule affinity-regulating kinase 3). Expression levels of MARKL1 were markedly elevated in eight of nine HCCs in which nuclear accumulation of beta-catenin were observed, which may suggest that MARKL1 plays some role in hepatocellular carcinogenesis.

journal_name

Neoplasia

authors

Kato T,Satoh S,Okabe H,Kitahara O,Ono K,Kihara C,Tanaka T,Tsunoda T,Yamaoka Y,Nakamura Y,Furukawa Y

doi

10.1038/sj.neo.7900132

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

4-9

issue

1

eissn

1522-8002

issn

1476-5586

journal_volume

3

pub_type

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