CXCR1 and CXCR2 enhances human melanoma tumourigenesis, growth and invasion

S. Singh, K. C. Nannuru, A. Sadanandam, M. L. Varney, Rakesh K Singh

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

The aggressiveness of malignant melanoma is associated with differential expression of CXCL-8 and its receptors, CXCR1 and CXCR2. However, the precise functional role of these receptors in melanoma progression remains unclear. In this study, we investigate the precise functional role of CXCR1 and CXCR2 in melanoma progression. CXCR1 or CXCR2 were stably overexpressed in human melanoma cell lines, SBC-2 (non-tumourigenic) and A375P (low-tumourigenic) exhibiting low endogenous expression of receptors. Functional assays were performed to study the resulting changes in cell proliferation, motility and invasion, and in vivo tumour growth using a mouse xenograft model. Our data demonstrated that CXCR1- or CXCR2-overexpressing SBC-2 and A375P melanoma cells had enhanced proliferation, chemotaxis and invasiveness in vitro. Interestingly, CXCR1 or CXCR2 overexpression in SBC-2 cells induced tumourigenicity, and A375P cells significantly enhanced tumour growth as examined in vivo. Immunohistochemical analyses showed significantly increased tumour cell proliferation and microvessel density and reduced apoptosis in tumours generated from CXCR1- or CXCR2-overexpressing melanoma cells. CXCR1- or CXCR2-induced modulation of melanoma cell proliferation and migration was observed to be mediated through the activation of ERK12 phosphorylation. Together, these studies demonstrate that CXCR1 and CXCR2 play essential role in growth, survival, motility and invasion of human melanoma.

Original languageEnglish (US)
Pages (from-to)1638-1646
Number of pages9
JournalBritish journal of cancer
Volume100
Issue number10
DOIs
StatePublished - May 19 2009

Fingerprint

Melanoma
Growth
Cell Proliferation
Cell Movement
Interleukin-8A Receptors
Neoplasms
Interleukin-8B Receptors
Chemotaxis
Microvessels
Heterografts
Phosphorylation
Apoptosis
Cell Line
Survival

Keywords

  • CXCL-8
  • CXCR1
  • CXCR2
  • Human melanoma
  • Invasion
  • Tumourigenesis

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

CXCR1 and CXCR2 enhances human melanoma tumourigenesis, growth and invasion. / Singh, S.; Nannuru, K. C.; Sadanandam, A.; Varney, M. L.; Singh, Rakesh K.

In: British journal of cancer, Vol. 100, No. 10, 19.05.2009, p. 1638-1646.

Research output: Contribution to journalArticle

Singh, S. ; Nannuru, K. C. ; Sadanandam, A. ; Varney, M. L. ; Singh, Rakesh K. / CXCR1 and CXCR2 enhances human melanoma tumourigenesis, growth and invasion. In: British journal of cancer. 2009 ; Vol. 100, No. 10. pp. 1638-1646.
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