Markedly induced expression of LR11 in atherosclerosis.

Abstract:

:Receptors belonging to the low density lipoprotein receptor (LDLR) superfamily play important biological roles in addition to mediating the lipoprotein metabolism. The recent discovery of a novel mosaic LDLR family member by us (Yamazaki H, Bujo H, Kusunoki J, Seimiya K, Kanaki T, Morisaki N, Schneider WJ, and Saito Y J Biol Chem 271: 24761-24768, 1996) and others, which we termed LR11, offers the opportunity to gain new insights into receptor multifunctionality. The expression of a 250-kDa mosaic LDLR family member, which we termed LR11 due to the presence of 11 ligand binding repeats, is markedly induced during the process of atherogenesis in two animal models. The highest induction of LR11 occurs in the intimal smooth muscle cells (SMCs) of atheromatous lesions. In agreement with the correlation of LR11 induction during increased cell proliferation in vivo, cultured SMCs showed a marked increase in LR11 expression in the proliferative phase. Furthermore, such proliferation-dependent expression of LR11 could be observed in a cultured neuroblastoma cell line, which was established to be a suitable in vitro model for proliferation and differentiation. Possible involvement of LR11 in the cellular proliferation sheds new light on the recently proposed novel functions of the LDL receptor gene family in atherosclerosis.

journal_name

J Atheroscler Thromb

authors

Bujo H,Saito Y

doi

10.5551/jat1994.7.21

subject

Has Abstract

pub_date

2000-01-01 00:00:00

pages

21-5

issue

1

eissn

1340-3478

issn

1880-3873

journal_volume

7

pub_type

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