ICAM-1 polymorphisms and development of cutaneous malignant melanoma.
Tumour growth in cutaneous malignant melanoma (CMM) is mediated by cell adhesion molecules, including intercellular adhesion molecule-1 (ICAM-1). ICAM-1 expression is associated with increasing Breslow thickness of vertical growth-phase tumours and, in patients with stage 1 disease, may be associated with disease free and patient survival. In this study we have investigated whether two single nucleotide polymorphisms (SNPs) in the ICAM-1 gene encoding amino acid substitutions in codons 241 and 469 of the expressed ICAM-1 molecule are associated with susceptibility to and markers of prognosis (including tumour Breslow thickness) in CMM. A total of 164 CMM patients and 264 cancer-free controls were genotyped for these SNPs by the 5' nuclease assay for allelic discrimination (TaqMan). No genotypes showed any significant associations with CMM susceptibility, although there was a non-significant increase in frequency of the ICAM-1 469 AA genotype among CMM patients vs. controls (38.4% vs. 29.9%; P = 0.11). However, the ICAM-1 241 GG genotype was significantly decreased in frequency among patients with primary invasive tumours of greater Breslow thickness (72.5% vs. 91.2%; P = 0.013; OR = 0.25 (0.072-0.85)). These results provide no evidence for a role for the ICAM-1 codon 241 and 469 SNPs in determining susceptibility to CMM, but provide preliminary evidence that the role of ICAM-1 polymorphism in modulating tumour growth in CMM requires further investigation in a larger study group.
Howell
W M
WM
Molecular Pathology Laboratory, Southampton University Hospitals NHS Trust, Southampton, UK. martin.howell@nbs.nhs.uk
Rose-Zerilli
M J
MJ
Theaker
J M
JM
Bateman
A C
AC
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D003062:Codon / Q000235:genetics; D005260:Female; D005500:Follow-Up Studies; D015972:Gene Expression Regulation, Neoplastic / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics*; D008297:Male; D008545:Melanoma / Q000235:genetics*; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D012878:Skin Neoplasms / Q000235:genetics*
D003062:Codon; D018799:Intercellular Adhesion Molecule-1