High expression of calcium-binding proteins, S100A10, S100A11 and CALM2 in anaplastic large cell lymphoma.
Anaplastic large cell lymphomas (ALCL) are characterised by the presence of CD30-positive large cells, which usually are of T-cell type. Based on the presence or absence of translocations involving the anaplastic lymphoma kinase (ALK) locus, ALCL cases can be divided into two groups. To gain more insight in the biology of ALCL, we applied serial analysis of gene expression (SAGE) on the Karpas299 cell line and identified 25 up- and 19 downregulated genes. Comparison of the differentially expressed genes with DNA copy number changes in Karpas299 revealed that two overexpressed genes, S100A10 and S100A11, were located in an amplicon suggesting that the increased mRNA levels were caused by DNA amplification. Quantitative reverse transcription polymerase chain reaction on 5 ALCL cell lines and 12 ALCL tissues confirmed the SAGE data for 13 out of 14 up- and one out of four downregulated genes. Immunohistochemical staining confirmed the presence of S100A10, a calcium-binding protein, in three out of five ALK+ and all 7 ALK- ALCL cases. S100A11 staining was confirmed in all ALK+ and six of seven ALK- ALCL cases. Three of the upregulated genes represented calcium-binding proteins, which suggest that altered intracellular signaling might be associated with the oncogenesis of ALCL.
Rust
Renata
R
Department of Pathology and Laboratory Medicine, University Medical Centre Groningen, Groningen, the Netherlands.
Visser
Lydia
L
van der Leij
Judith
J
Harms
Geert
G
Blokzijl
Tjasso
T
Deloulme
Jean C
JC
van der Vlies
Pieter
P
Kamps
Willem
W
Kok
Klaas
K
Lim
Megan
M
Poppema
Sibrand
S
van den Berg
Anke
A
D017306:Annexin A2 / Q000032:analysis / Q000235:genetics*; D015496:CD4-Positive T-Lymphocytes / Q000378:metabolism; D020013:Calcium Signaling / Q000235:genetics*; D002147:Calmodulin / Q000235:genetics*; D045744:Cell Line, Tumor; D002478:Cells, Cultured; D015536:Down-Regulation; D037483:Galectin 1 / Q000032:analysis / Q000235:genetics; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics* / Q000378:metabolism; D008565:Membrane Proteins / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D009418:S100 Proteins / Q000032:analysis / Q000235:genetics*; D000099248:S100 Calcium Binding Protein A10
D017306:Annexin A2; D002147:Calmodulin; D037483:Galectin 1; D008565:Membrane Proteins; D009418:S100 Proteins; D000099248:S100 Calcium Binding Protein A10; C488659:CALM2 protein, human; C072337:S100A11 protein, human; C100848:LAPTM5 protein, human