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Regulation of the Multiple Promoters of the Human Aldolase A Gene: Response of Its Two Ubiquitous Promoters to Agents Promoting Cell Proliferation

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Specialty Biochemistry
Date 1991 Feb 25
PMID 1850123
Citations 8
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Abstract

The human aldolase A gene is transcribed from three distinct promoters, the two ubiquitous promoters PN and PH and the muscle specific promoter PM. In the present study, we investigate further aldolase A mRNA structure and expression. We demonstrate that the upstream N-type exon is, in fact, extremely heterogeneous. RNAse H mapping experiments permit quantification of relative abundance of N, M, and H type mRNAs and show that the level of transcripts containing the downstream H-type exon is at least 30 times higher than that of those containing N exon, in all tissues tested. Aldolase A level is up-regulated in proliferating cells. Here we show that both N and H type mRNAs, although barely detectable in normal liver, are highly expressed in human hepatomas biopsies. Furthermore, in human lymphocytes, N-type mRNA level is enhanced by serum treatment, while in cultured Hep G2 cells, both N-type and H-type mRNA levels are increased by serum and by the tumor promoting agent PMA. Using CAT constructs in transfection experiments, we demonstrate that the H exon plus its upstream region can function autonomously: the 420 base pairs upstream of the H exon are sufficient to confer to promoter PH an efficiency comparable that of the complete SV40 early promoter and enhancer in two cell lines.

Citing Articles

The human pH aldolase A promoter directs widespread but muscle-predominant expression in transgenic mice.

Moch C, Spitz F, Porteu A, Kahn A, Daegelen D Transgenic Res. 1998; 7(2):113-21.

PMID: 9608739 DOI: 10.1023/a:1008820409079.


Characterization of the promoter of human adipocyte hormone-sensitive lipase.

GROBER J, Laurell H, Blaise R, Fabry B, Schaak S, Holm C Biochem J. 1998; 328 ( Pt 2):453-61.

PMID: 9371701 PMC: 1218941. DOI: 10.1042/bj3280453.


Purification of a dichlorophenol-indophenol oxidoreductase from rat and bovine synaptic membranes: tight complex association of a glyceraldehyde-3-phosphate dehydrogenase isoform, TOAD64, enolase-gamma and aldolase C.

Bulliard C, Zurbriggen R, Tornare J, Faty M, Dastoor Z, Dreyer J Biochem J. 1997; 324 ( Pt 2):555-63.

PMID: 9182718 PMC: 1218466. DOI: 10.1042/bj3240555.


Independence and interdependence of the three human aldolase A promoters in transgenic mice.

Moch C, Kahn A, Daegelen D Gene Expr. 1996; 6(1):1-14.

PMID: 8931987 PMC: 6148263.


An opportunistic promoter sharing regulatory sequences with either a muscle-specific or a ubiquitous promoter in the human aldolase A gene.

Concordet J, Salminen M, Demignon J, Moch C, Maire P, Kahn A Mol Cell Biol. 1993; 13(1):9-17.

PMID: 8417365 PMC: 358879. DOI: 10.1128/mcb.13.1.9-17.1993.


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