APEG-1, a novel gene preferentially expressed in aortic smooth muscle cells, is down-regulated by vascular injury

Chung Ming Hsieh, Masao Yoshizumi, Wilson O. Endege, Choon Joo Kho, Mukesh K. Jain, Saori Kashiki, Rico De los Santos, Wen Sen Leet, Mark A. Perrella, Mu En Lee

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Despite the importance of phenotypic alterations in arterial smooth muscle cells (ASMC) during the pathogenesis of arteriosclerosis, little is known about genes that define differentiated ASMC. Using differential mRNA display, we isolated a novel gene preferentially expressed in the rat aorta and termed this gene APEG-1. The cDNA of rat APEG-1 contained an open reading frame encoding 113 amino acids, which would predict a basic protein of 12.7 kDa. The amino acid sequence of rat APEG-1 was highly conserved among human and mouse homologues (97 and 98%, respectively). Using an APEG-1 fusion protein containing an N-terminal c-Myc tag, we identified APEG-1 as a nuclear protein. By in situ hybridization, APEG-1 mRNA was expressed in rat ASMC. Although APEG-1 was expressed highly in differentiated ASMC in vivo, its expression was quickly down-regulated and disappeared in dedifferentiated ASMC in culture. In vivo, APEG-1 mRNA levels decreased by more than 80% in response to vascular injury as ASMC changed from a quiescent to a proliferative phenotype. Taken together, these data indicate that APEG-1 is a novel marker for differentiated ASMC and may have a role in regulating growth and differentiation of this cell type.

Original languageEnglish
Pages (from-to)17354-17359
Number of pages6
JournalJournal of Biological Chemistry
Volume271
Issue number29
DOIs
Publication statusPublished - 1996
Externally publishedYes

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Vascular System Injuries
Smooth Muscle Myocytes
Muscle
Genes
Cells
Rats
Messenger RNA
Amino Acids
Arteriosclerosis
Gene Expression Profiling
Nuclear Proteins
Open Reading Frames
In Situ Hybridization
Aorta
Cell Differentiation
Amino Acid Sequence
Proteins
Fusion reactions
Complementary DNA
Cell Culture Techniques

ASJC Scopus subject areas

  • Biochemistry

Cite this

Hsieh, C. M., Yoshizumi, M., Endege, W. O., Kho, C. J., Jain, M. K., Kashiki, S., ... Lee, M. E. (1996). APEG-1, a novel gene preferentially expressed in aortic smooth muscle cells, is down-regulated by vascular injury. Journal of Biological Chemistry, 271(29), 17354-17359. https://doi.org/10.1074/jbc.271.29.17354

APEG-1, a novel gene preferentially expressed in aortic smooth muscle cells, is down-regulated by vascular injury. / Hsieh, Chung Ming; Yoshizumi, Masao; Endege, Wilson O.; Kho, Choon Joo; Jain, Mukesh K.; Kashiki, Saori; De los Santos, Rico; Leet, Wen Sen; Perrella, Mark A.; Lee, Mu En.

In: Journal of Biological Chemistry, Vol. 271, No. 29, 1996, p. 17354-17359.

Research output: Contribution to journalArticle

Hsieh, CM, Yoshizumi, M, Endege, WO, Kho, CJ, Jain, MK, Kashiki, S, De los Santos, R, Leet, WS, Perrella, MA & Lee, ME 1996, 'APEG-1, a novel gene preferentially expressed in aortic smooth muscle cells, is down-regulated by vascular injury', Journal of Biological Chemistry, vol. 271, no. 29, pp. 17354-17359. https://doi.org/10.1074/jbc.271.29.17354
Hsieh, Chung Ming ; Yoshizumi, Masao ; Endege, Wilson O. ; Kho, Choon Joo ; Jain, Mukesh K. ; Kashiki, Saori ; De los Santos, Rico ; Leet, Wen Sen ; Perrella, Mark A. ; Lee, Mu En. / APEG-1, a novel gene preferentially expressed in aortic smooth muscle cells, is down-regulated by vascular injury. In: Journal of Biological Chemistry. 1996 ; Vol. 271, No. 29. pp. 17354-17359.
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