Quantitative analysis of Op18 phosphorylation in childhood acute leukemia.

Abstract:

:Oncoprotein 18 (Op18) is a major cystolic phosphoprotein constituent of leukemia cells. There is cumulative evidence that suggests a role for Op18 in integrating signals from diverse pathways involved in cell growth. Op18 phosphorylation is induced with proliferation in a variety of cell types, and is essential for cell cycle progression. In this study we analyzed the level of unphosphorylated Op18 and of its major phosphorylated forms, Op18a and Op18b, in a series of 177 childhood acute leukemias by means of quantitative two-dimensional polyacrylamide gel electrophoresis (2-D PAGE). Op18 phosphorylation was significantly correlated with the white blood count at the time of diganosis, and with a high percentage of cells in the S phase. Our findings suggest that strategies to inhibit Op18 expression or phosphorylation may be effective in inhibiting leukemia cell proliferation.

journal_name

Leukemia

journal_title

Leukemia

authors

Melhem R,Hailat N,Kuick R,Hanash SM

doi

10.1038/sj.leu.2400792

subject

Has Abstract

pub_date

1997-10-01 00:00:00

pages

1690-5

issue

10

eissn

0887-6924

issn

1476-5551

journal_volume

11

pub_type

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