Up-regulation of the expression of leucine-rich alpha(2)-glycoprotein in hepatocytes by the mediators of acute-phase response.

Abstract:

:Leucine-rich alpha(2)-glycoprotein (LRG) is a plasma protein in which leucine-rich repeats (LRRs) were first discovered. Although the physiological function of LRG is not known, increases in the serum level of LRG have been reported in various diseases. In this study, we found that LRG was induced by recombinant human IL-6 in human hepatoma HepG2 cells. The induction of LRG by IL-6 was up-regulated synergistically with either IL-1beta or TNFalpha in a pattern similar to those for type 1 acute-phase proteins. We also found that lipopolysaccharide (LPS) administered intraperitoneally to mice enhanced dose-dependently the expression of LRG mRNA in the liver as well as those for mouse major acute-phase proteins. These results strongly suggest that LRG was a secretory type 1 acute-phase protein whose expression was up-regulated by the mediator of acute-phase response.

authors

Shirai R,Hirano F,Ohkura N,Ikeda K,Inoue S

doi

10.1016/j.bbrc.2009.03.104

subject

Has Abstract

pub_date

2009-05-15 00:00:00

pages

776-9

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(09)00596-8

journal_volume

382

pub_type

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