Gene expression profiling of cell lines derived from T-cell malignancies.
The expression profiles of eight cell lines derived from T-cell malignancies were compared to CD4-positive T-cells using cDNA microarray technology. Unsupervised hierarchical clustering of 4364 genes demonstrated substantial heterogeneity resulting in four distinct groups. While no genes were found to be uniformly up- or down-regulated across all cell lines, we observed 111 over-expressed genes (greater than two-fold) and 1118 down-regulated genes (greater than two-fold) in the lymphomas as a group when compared to CD4-positive T-cells. These included genes involved in cytokine signaling, cell adhesion, cytoskeletal elements, nuclear transcription factors, and known oncogenes and tumor suppressor genes. Quantitative fluorescent reverse transcription-polymerase chain reaction analysis demonstrated 70% concordance with the microarray results. While freshly isolated malignant cells may differ in their individual expression patterns relative to established cell lines from the same diagnoses, we feel that the variety of different lymphocytic cell lines that we examined provides a representative picture of the molecular pathogenesis of T-cell malignancies.
Fillmore
G Chris
GC
Department of Pathology, University of Utah Health Sciences Center, 50 North Medical Drive, Salt Lake City 84132, USA.
Lin
Zhaosheng
Z
Bohling
Sandra D
SD
Robetorye
Ryan S
RS
Kim
Chan-Hwan
CH
Jenson
Stephen D
SD
Elenitoba-Johnson
Kojo S J
KS
Lim
Megan S
MS
D015496:CD4-Positive T-Lymphocytes; D005456:Fluorescent Dyes; D015870:Gene Expression; D020869:Gene Expression Profiling; D006801:Humans; D019169:Jurkat Cells; D016399:Lymphoma, T-Cell / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013601:T-Lymphocytes; D014407:Tumor Cells, Cultured
D005456:Fluorescent Dyes