Purpose
While many Mycosis Fungoides (MF) patients presenting with stage I disease enjoy an indolent disease course and normal life expectancy, about 15-20% of them progress to higher stages, and most ultimately succumb to their disease. Currently, it's not possible to predict which patients will progress and which patients will have a stable disease. Previously, we conducted microarray analyses with RT-PCR validation of gene expression in biopsy specimens from 60 stage I-IV CTCL patients, identified three distinct clusters based upon transcription profile and correlated our molecular findings with 6 years of clinical follow up.
Experimental Design
We test by RT-PCR within our prediction model the expression of ∼240 genes that were previously reported to play an important role in CTCL carcinogenesis. We further extend the clinical follow up of our patients to 11 years. We compare the expression of selected genes between MF/Sézary Sydrome and benign inflammatory dermatoses that often mimic this cancer.
Results
Our findings demonstrate that 52 out of the ∼240 genes can be classified into cluster 1-3 expression patterns and such expression is consistent with their suggested biological roles. Moreover, we determined that 17 genes (CCL18, CCL26, FYB, T3JAM, MMP12, LEF1, LCK, ITK, GNLY, IL2RA, IL-26, IL-22, CCR4, GTSF1, SYCP1, STAT5A, TOX) are able to both identify patients who are at risk of progression and also distinguish MF/SS from benign mimickers.
Conclusions
This study, combined with other gene expression analyses, prepares the foundation for the development of personalized molecular approach towards diagnosis and treatment of CTCL.