Modulation of myogenic determination factor 1 expression by cell-cell contact

An Song, Raymond Daub, Maureen Harrington

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Myogenic determination factor 1 (MyoD1) expression is modulated by a variety of agents including growth factors and activated cellular proto-oncogenes. However, little is known about the effect of cell-cell contact, which increases as myoblasts terminally differentiate, on the control of MyoD1 expression. Steady-state levels of MyoD1 transcripts decline over a 6-12 hour time period when myoblasts plated at a single cell density are incubated in media supplemented with 0.2% serum; by 48 hours MyoD1 mRNA levels have returned to the initial basal level. The decline in MyoD1 transcripts is diminished, but not prevented in myoblasts which maintain cell-cell contacts (at least 50% of cells with two or more sites of contact). MyoD1 transcript levels do not change if single cell cultures are maintained in 10% serum or are cocultured with fibroblasts. Analysis of conditioned media revealed that myoblasts plated at the single cell density or at a density which allowed multiple sites of cell-cell contact are not producing an activity(s) responsible for modulating MyoD1 mRNA levels. The changes in MyoD1 expression are mediated at the transcriptional level. Thus changes in the degree of cell-cell contact in cultures of myogenically determined cell lines effect changes in MyoD1 gene expression. Consequently when the influence of cytokines or other pharmacological agents on commitment to terminal myogenic differentiation is examined, the degree of cell-cell contact within the culture system may affect the response elicited.

Original languageEnglish
Pages (from-to)257-263
Number of pages7
JournalJournal of Cellular Physiology
Volume156
Issue number2
StatePublished - Aug 1993

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Cell culture
Modulation
Messenger RNA
Fibroblasts
Conditioned Culture Medium
Gene expression
Intercellular Signaling Peptides and Proteins
Myoblasts
Cells
Cytokines
Cell Count
Proto-Oncogenes
Serum
Cell Culture Techniques
Pharmacology
Gene Expression
Cell Line

ASJC Scopus subject areas

  • Cell Biology
  • Clinical Biochemistry
  • Physiology

Cite this

Modulation of myogenic determination factor 1 expression by cell-cell contact. / Song, An; Daub, Raymond; Harrington, Maureen.

In: Journal of Cellular Physiology, Vol. 156, No. 2, 08.1993, p. 257-263.

Research output: Contribution to journalArticle

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