CD44v3 levels in primary cutaneous melanoma are predictive of prognosis: assessment by the use of tissue microarray.
Despite the use of sentinel node biopsy techniques, the search continues for other strategies to improve the accuracy of estimating prognosis in melanoma patients. Various biomarkers have previously been studied for use in this role, but none has yet achieved acceptance in routine practice. We have applied the novel technology of tissue microarray for the high throughput screening of a cohort of 120 primary cutaneous melanoma specimens for expression of the transmembrane glycoprotein CD44, splice variant 3 (v3), which has previously been implicated in tumor progression. A highly significant correlation between CD44v3 expression and Breslow thickness, Clark's level and patient age was demonstrated (Spearman correlation p < 0.001). Regarding clinical outcome, CD44v3 expression was shown to be significantly associated with better outcome (chi(2) = 7.2219, p = 0.0072). Furthermore, subgroup analysis revealed a sequentially improved survival probability associated with the intensity of CD44v3 staining (chi(2) = 12.5162, p = 0.0058). Analysis in a Cox multivariate model, however, did not show CD44v3 to be independently predictive of prognosis. The implications of these findings are considered, and the use of CD44v3 as a potential prognostic marker or a target for therapeutic manipulation are discussed.
Pacifico
Marc D
MD
The RAFT institute of Plastic Surgery, Mount Vernon Hospital, Northwood, Middlesex HA6 2RN, United Kingdom. marcpacifico@dial.pipex.com
Grover
Rajiv
R
Richman
Paul I
PI
Daley
Frances M
FM
Buffa
Francesca
F
Wilson
George D
GD
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D018960:Hyaluronan Receptors / Q000032:analysis*; D007150:Immunohistochemistry / Q000706:statistics & numerical data; D008297:Male; D008545:Melanoma / Q000378:metabolism / Q000473:pathology*; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D011379:Prognosis; D016016:Proportional Hazards Models; D012878:Skin Neoplasms / Q000378:metabolism / Q000473:pathology*; D016019:Survival Analysis; D046888:Tissue Array Analysis
D014408:Biomarkers, Tumor; C121450:CD44V3,8-10; D018960:Hyaluronan Receptors