Id1 delays senescence of primary human melanocytes

Staci D. Cummings, Byungwoo Ryu, Michael A. Samuels, Xiaobing Yu, Alan Keith Meeker, Megan A. Healey, Rhoda M. Alani

Research output: Contribution to journalArticle

Abstract

The Id family of helix-loop-helix transcription factors is upregulated in a variety of human malignancies and has been implicated in promoting tumorigenesis through effects on cell growth, differentiation, and tumor angiogenesis. While expression of Id proteins has been associated with tumorigenesis, the precise mechanistic relationship between Id expression and carcinogenesis has not been clearly delineated. We have previously shown that Id1 delays cellular senescence in primary mammalian cells through inhibition of the cell cycle regulatory protein and familial melanoma gene, p16/INK4a. We have also demonstrated that Id1 expression is upregulated in early stage primary human melanomas and may be an important marker for early malignancy. In order to further define the role of Id1 in human melanoma development, we have evaluated the function of Id1 in primary human melanocytes. Here we show that constitutive expression of Id1 in primary human melanocytes leads to delayed cellular senescence and decreased expression of the familial melanoma gene, p16/INK4a. Although melanocytes constitutively expressing Id1 are shown to possess extended lifespans, this is not associated with an appreciable change in cell growth or telomere length. We conclude that Id1 delays cellular senescence in primary human melanocytes through inhibition of p16/INK4a expression and suggest that Id1 may contribute to the malignant conversion of primary human melanocytes through extension of cellular lifespan.

Original languageEnglish (US)
Pages (from-to)653-659
Number of pages7
JournalMolecular Carcinogenesis
Volume47
Issue number9
DOIs
StatePublished - Sep 2008

Fingerprint

Melanocytes
Cell Aging
p16 Genes
Carcinogenesis
Melanoma
Neoplasms
Cell Cycle Proteins
Telomere
Human Development
Growth
Cell Differentiation
Transcription Factors
Proteins

Keywords

  • Id1
  • Melanocyte
  • Senescence

ASJC Scopus subject areas

  • Cancer Research
  • Molecular Biology

Cite this

Cummings, S. D., Ryu, B., Samuels, M. A., Yu, X., Meeker, A. K., Healey, M. A., & Alani, R. M. (2008). Id1 delays senescence of primary human melanocytes. Molecular Carcinogenesis, 47(9), 653-659. https://doi.org/10.1002/mc.20422

Id1 delays senescence of primary human melanocytes. / Cummings, Staci D.; Ryu, Byungwoo; Samuels, Michael A.; Yu, Xiaobing; Meeker, Alan Keith; Healey, Megan A.; Alani, Rhoda M.

In: Molecular Carcinogenesis, Vol. 47, No. 9, 09.2008, p. 653-659.

Research output: Contribution to journalArticle

Cummings, SD, Ryu, B, Samuels, MA, Yu, X, Meeker, AK, Healey, MA & Alani, RM 2008, 'Id1 delays senescence of primary human melanocytes', Molecular Carcinogenesis, vol. 47, no. 9, pp. 653-659. https://doi.org/10.1002/mc.20422
Cummings SD, Ryu B, Samuels MA, Yu X, Meeker AK, Healey MA et al. Id1 delays senescence of primary human melanocytes. Molecular Carcinogenesis. 2008 Sep;47(9):653-659. https://doi.org/10.1002/mc.20422
Cummings, Staci D. ; Ryu, Byungwoo ; Samuels, Michael A. ; Yu, Xiaobing ; Meeker, Alan Keith ; Healey, Megan A. ; Alani, Rhoda M. / Id1 delays senescence of primary human melanocytes. In: Molecular Carcinogenesis. 2008 ; Vol. 47, No. 9. pp. 653-659.
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