MicroRNA profiling of primary cutaneous large B-cell lymphomas

PLoS One. 2013 Dec 16;8(12):e82471. doi: 10.1371/journal.pone.0082471. eCollection 2013.

Abstract

Aberrant expression of microRNAs is widely accepted to be pathogenetically involved in nodal diffuse large B-cell lymphomas (DLBCLs). However, the microRNAs profiles of primary cutaneous large B-cell lymphomas (PCLBCLs) are not yet described. Its two main subtypes, i.e., primary cutaneous diffuse large B-cell lymphoma, leg type (PCLBCL-LT) and primary cutaneous follicle center lymphoma (PCFCL) are characterized by an activated B-cell (ABC)-genotype and a germinal center B-cell (GCB)-genotype, respectively. We performed high-throughput sequencing analysis on frozen tumor biopsies from 19 cases of PCFCL and PCLBCL-LT to establish microRNA profiles. Cluster analysis of the complete microRNome could not distinguish between the two subtypes, but 16 single microRNAs were found to be differentially expressed. Single microRNA RT-qPCR was conducted on formalin-fixed paraffin-embedded tumor biopsies of 20 additional cases, confirming higher expression of miR-9-5p, miR-31-5p, miR-129-2-3p and miR-214-3p in PCFCL as compared to PCLBCL-LT. MicroRNAs previously described to be higher expressed in ABC-type as compared to GCB-type nodal DLBCL were not differentially expressed between PCFCL and PCLBCL-LT. In conclusion, PCFCL and PCLBCL-LT differ in their microRNA profiles. In contrast to their gene expression profile, they only show slight resemblance with the microRNA profiles found in GCB- and ABC-type nodal DLBCL.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Child
  • Female
  • Gene Expression Profiling*
  • Gene Expression Regulation, Neoplastic*
  • Germinal Center / metabolism
  • Germinal Center / pathology
  • Humans
  • Lymphoma, B-Cell / genetics*
  • Lymphoma, B-Cell / metabolism
  • Lymphoma, B-Cell / pathology
  • Lymphoma, Follicular / genetics
  • Lymphoma, Follicular / metabolism
  • Lymphoma, Follicular / pathology
  • Lymphoma, Large B-Cell, Diffuse / genetics
  • Lymphoma, Large B-Cell, Diffuse / metabolism
  • Lymphoma, Large B-Cell, Diffuse / pathology
  • Male
  • MicroRNAs / genetics*
  • Middle Aged
  • Skin Neoplasms / genetics*
  • Skin Neoplasms / metabolism
  • Skin Neoplasms / pathology

Substances

  • MicroRNAs

Grants and funding

The authors have no support or funding to report.