Differential Expression of miR-155 and miR-21 in Tumor and Stroma Cells in Diffuse Large B-Cell Lymphoma
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Differential Expression of miR-155 and miR-21 in Tumor and Stroma Cells in Diffuse Large B-Cell Lymphoma. / Munch-Petersen, Helga D; Ralfkiaer, Ulrik; Sjö, Lene D; Hother, Christoffer; Asmar, Fazila; Nielsen, Boye S; Brown, Peter; Ralfkiaer, Elisabeth; Grønbæk, Kirsten.
I: Applied Immunohistochemistry & Molecular Morphology, Bind 23, Nr. 3, 03.2015, s. 188-195.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Differential Expression of miR-155 and miR-21 in Tumor and Stroma Cells in Diffuse Large B-Cell Lymphoma
AU - Munch-Petersen, Helga D
AU - Ralfkiaer, Ulrik
AU - Sjö, Lene D
AU - Hother, Christoffer
AU - Asmar, Fazila
AU - Nielsen, Boye S
AU - Brown, Peter
AU - Ralfkiaer, Elisabeth
AU - Grønbæk, Kirsten
PY - 2015/3
Y1 - 2015/3
N2 - OncomiRs miR-21 and miR-155 have been linked to lymphomagenesis, but information on their implication in diffuse large B-cell lymphoma (DLBCL) is limited. Here, we used locked nucleic acid-based in situ hybridization (ISH) detection techniques on formalin-fixed paraffin-embedded DLBCL tissue samples to identify miR-155 and miR-21 at the cellular level in 56 patients diagnosed with DLBCL, and compared them to miR array data. miR-155 was observed in tumor cells in 19/56 (33.9%) of the samples evaluated by ISH. miR-21 was localized to the stromal compartment in 41/56 (73.2%). A subset of these, 16/56 (28.6%), also showed labeling in tumor cells. When comparing ISH-scores and miR array data, miR-155 in tumor cells, identified by ISH, was associated with miR-155 expression in miR array data (P=0.030). Equally, miR-21 expression by miR array data were highly associated with miR-21 ISH-scores in the stromal cells (P=0.002), whereas no association between miR array data and ISH of miR-21 in tumor cells was observed (P=0.673). We found no association of miR-155 and miR-21 with overall survival or germinal center B-cell-like (GCB) versus non-GCB-like subtypes of DLBCL. In conclusion, miR-ISH added to the biological interpretation of miR expression in DLBCL compared with miR array data, but miR-155 and miR-21 ISH did not add prognostic information in this series.
AB - OncomiRs miR-21 and miR-155 have been linked to lymphomagenesis, but information on their implication in diffuse large B-cell lymphoma (DLBCL) is limited. Here, we used locked nucleic acid-based in situ hybridization (ISH) detection techniques on formalin-fixed paraffin-embedded DLBCL tissue samples to identify miR-155 and miR-21 at the cellular level in 56 patients diagnosed with DLBCL, and compared them to miR array data. miR-155 was observed in tumor cells in 19/56 (33.9%) of the samples evaluated by ISH. miR-21 was localized to the stromal compartment in 41/56 (73.2%). A subset of these, 16/56 (28.6%), also showed labeling in tumor cells. When comparing ISH-scores and miR array data, miR-155 in tumor cells, identified by ISH, was associated with miR-155 expression in miR array data (P=0.030). Equally, miR-21 expression by miR array data were highly associated with miR-21 ISH-scores in the stromal cells (P=0.002), whereas no association between miR array data and ISH of miR-21 in tumor cells was observed (P=0.673). We found no association of miR-155 and miR-21 with overall survival or germinal center B-cell-like (GCB) versus non-GCB-like subtypes of DLBCL. In conclusion, miR-ISH added to the biological interpretation of miR expression in DLBCL compared with miR array data, but miR-155 and miR-21 ISH did not add prognostic information in this series.
KW - Adult
KW - Aged
KW - Aged, 80 and over
KW - Female
KW - Gene Expression Regulation, Neoplastic
KW - Humans
KW - Lymphoma, Large B-Cell, Diffuse
KW - Male
KW - MicroRNAs
KW - Middle Aged
KW - RNA, Neoplasm
KW - Stromal Cells
U2 - 10.1097/PAI.0000000000000073
DO - 10.1097/PAI.0000000000000073
M3 - Journal article
C2 - 25265435
VL - 23
SP - 188
EP - 195
JO - Applied Immunohistochemistry & Molecular Morphology
JF - Applied Immunohistochemistry & Molecular Morphology
SN - 1541-2016
IS - 3
ER -
ID: 152932763