The clinicopathological significance of lamin A/C, lamin B1 and lamin B receptor mRNA expression in human breast cancer

Cell Mol Biol Lett. 2013 Dec;18(4):595-611. doi: 10.2478/s11658-013-0109-9. Epub 2013 Nov 30.

Abstract

Lamin A/C (LMNA), lamin B1 (LMNB1) and lamin B receptor (LBR) have key roles in nuclear structural integrity and chromosomal stability. In this study, we have studied the relationships between the mRNA expressions of A-type lamins, LMNB1 and LBR and the clinicopathological parameters in human breast cancer. Samples of breast cancer tissues (n = 115) and associated non-cancerous tissue (ANCT; n = 30) were assessed using reverse transcription and quantitative PCR. Transcript levels were correlated with clinicopathological data. Higher levels of A-type lamins and LMNB1 mRNA expression were seen in ANCT. Higher lamin A/C expression was associated with the early clinical stage (TNM1 vs. TNM3 - 13 vs. 0.21; p = 0.0515), with better clinical outcomes (disease-free survival vs. mortality - 11 vs. 1; p = 0.0326), and with better overall (p = 0.004) and disease-free survival (p = 0.062). The expression of LMNB1 declined with worsening clinical outcome (disease-free vs. mortalities - 0.0011 vs. 0.000; p = 0.0177). LBR mRNA expression was directly associated with tumor grade (grade 1 vs. grade 3 - 0.00 vs. 0.00; p = 0.0479) and Nottingham Prognostic Index (NPI1 vs. NPI3 - 0.00 vs. 0.00; p = 0.0551). To the best of our knowledge, this is the first study to suggest such a role for A-type lamins, lamin B1 and LBR in human breast cancer, identifying an important area for further research.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Breast / metabolism
  • Breast / pathology*
  • Breast Neoplasms / genetics*
  • Breast Neoplasms / pathology*
  • Cell Cycle
  • Chromosomal Instability
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Lamin B Receptor
  • Lamin Type A / genetics*
  • Lamin Type B / genetics*
  • RNA, Messenger / genetics
  • Receptors, Cytoplasmic and Nuclear / genetics*

Substances

  • Lamin Type A
  • Lamin Type B
  • RNA, Messenger
  • Receptors, Cytoplasmic and Nuclear