The Role of CDP in the Negative Regulation of CXCL1 Gene Expression

Chaitanya Nirodi, Jessie Hart, Punita Dhawan, Nam Sung Moon, Alain Nepveu, Ann Richmond

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The CXC chemokine, melanoma growth stimulatory activity/growth-regulated protein, CXCL1 is an important modulator of inflammation, wound healing, angiogenesis, and tumorigenesis. Transcription of CXCL1 is regulated through several cis-acting elements including Sp1, NF-κB, and an element that lies immediately upstream of the NF-κB element, the immediate upstream region (IUR). A transcription element data base search indicated that the IUR element contains a binding site for the transcriptional repressor, human CUT homeodomain protein/CCAAT displacement protein (CDP). It is shown here that in electrophoretic mobility shift assays, complexes obtained with the IUR oligonucleotide probe are supershifted by anti-CDP antibodies and that a CDP polypeptide containing a high affinity DNA binding domain binds to the sequence GGGATCGATC in the IUR element. In Southwestern blot analyses, oligonucleotides containing the wild-type IUR sequence, but not a mutant oligonucleotide with substitutions in the GGGATCGATC sequence, bind a 170-180-kDa protein. Furthermore, overexpression of the CDP protein blocks CXCL1 promoter activity in reporter gene assays, whereas overexpression of an antisense CDP construct leads to a significant increase in CXCL1 promoter activity. Mutations in the IUR element, which map in the putative CDP-binding site, inhibit the binding of CDP to the IUR element and favor increased transcription from the CXCL1 promoter. Based on these results, we propose that transcriptional regulation of the CXCL1 gene is mediated in part by CDP, which could play an important role in inflammatory processes and tumorigenesis.

Original languageEnglish (US)
Pages (from-to)26122-26131
Number of pages10
JournalJournal of Biological Chemistry
Volume276
Issue number28
DOIs
StatePublished - Jul 13 2001

Fingerprint

Gene Expression Regulation
Gene expression
Proteins
Transcription
Oligonucleotides
Assays
Carcinogenesis
Southwestern Blotting
Genes
Binding Sites
Homeodomain Proteins
CXC Chemokines
Electrophoretic mobility
Oligonucleotide Probes
Electrophoretic Mobility Shift Assay
Growth
Reporter Genes
Protein Binding
Wound Healing
Modulators

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

The Role of CDP in the Negative Regulation of CXCL1 Gene Expression. / Nirodi, Chaitanya; Hart, Jessie; Dhawan, Punita; Moon, Nam Sung; Nepveu, Alain; Richmond, Ann.

In: Journal of Biological Chemistry, Vol. 276, No. 28, 13.07.2001, p. 26122-26131.

Research output: Contribution to journalArticle

Nirodi, C, Hart, J, Dhawan, P, Moon, NS, Nepveu, A & Richmond, A 2001, 'The Role of CDP in the Negative Regulation of CXCL1 Gene Expression', Journal of Biological Chemistry, vol. 276, no. 28, pp. 26122-26131. https://doi.org/10.1074/jbc.M102872200
Nirodi, Chaitanya ; Hart, Jessie ; Dhawan, Punita ; Moon, Nam Sung ; Nepveu, Alain ; Richmond, Ann. / The Role of CDP in the Negative Regulation of CXCL1 Gene Expression. In: Journal of Biological Chemistry. 2001 ; Vol. 276, No. 28. pp. 26122-26131.
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