Transcriptional up-regulation of matrix metalloproteinase-9 expression during spontaneous epithelial to neuroblast phenotype conversion by SK-N-SH neuroblastoma cells, involved in enhanced invasivity, depends upon GT-box and nuclear factor κB elements

Antonietta R. Farina, Antonella Tacconelli, Alessandra Vacca, Marella Maroder, Alberto Gulino, Andrew R. Mackay

Research output: Contribution to journalArticlepeer-review

Abstract

Spontaneous epithelial (S) to neuroblast (N) conversion enhanced the capacity of SK-N-SH neuroblastoma (NB) cells to invade reconstituted basement membrane in vitro. This involved a switch to matrix metalloproteinase (MMP) activity, in particular MMP-G, and was associated with the induction of MMP- 9 expression. N-type-specific MMP-9 expression was herbimycin A inhibitable tyrosine kinase (possibly csrc) dependent and was regulated transcriptionally through GT-box (-52), and nuclear factor κB (NFκB; -600) elements within the MMP-9 gene. GT-box function was associated with elevated levels of specific nuclear GT-box binding complexes in N-type cells. NFκB function was associated with specific p50- and p65-containing nuclear NFκB binding complex(es). No function could be attributed to the proximal AP-1 (-79) element, and minimal function was attributed to the SP-1 (-560), ets (-540), or distal AP-1 (-533) elements. This was despite elevated levels of specific junD/fra-1 containing proximal AP-1 element binding complex(es) in N-type cells. Our data highlight a pivotal role for the GT-box, in concert with the NFκB element, in the transcriptional up-regulation of MMP-9 expression during spontaneous S to N phenotype conversion by SK-N-SH cells involved in enhanced basement membrane invasivity.

Original languageEnglish
Pages (from-to)353-367
Number of pages15
JournalCell Growth and Differentiation
Volume10
Issue number5
Publication statusPublished - May 1999

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

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