SNRPN methylation patterns in germ cell tumors as a reflection of primordial germ cell development

Kimberly J. Bussey, Helen J. Lawce, Eleanor Himoe, Xiao Ou Shu, Nyla A. Heerema, Elizabeth J. Perlman, Susan B. Olson, R. Ellen Magenis

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Studies examining altered imprinted gene expression in cancer compare the observed expression pattern to the normal expression pattern for a given tissue of origin, usually the somatic expression pattern for the imprinted gene. Germ cell tumors (GCTs), however, require a developmental stage-dependent comparison. To explore using methylation as an indicator of germ cell development, we determined the pattern of methylation at the 5′ untranslated region of SNRPN in 89 GCTs from both children and adults. Fifty-one of 84 tumors (60.7%) (12/30 (40%) of cultured pediatric GCTs, 23/36 (63.9%) of frozen adult GCTs, and 16/23 (69.5%) of frozen pediatric GCTs, with five samples having results from both cultured and uncultured material) demonstrated a nonsomatic methylation pattern after dual digestion with Xbal, Notl, and Southern blot analysis. In contrast, only 2 of 18 (11%) control samples (16 non-GCTs and 2 normal ovaries) exhibited a nonsomatic pattern. In both cases, the result was shown to be due to copy number differences between maternal and paternal homologs, unlike the GCTs in which there was no evidence of an uneven homolog number. A comparison of the data for only the gonadal GCTs and the control data showed a highly significant difference in the proportion of tumors with methylation alterations at this locus (P = 0.0000539). Since there is no published evidence of the involvement of SNRPN methylation changes in the development of malignancy, the data suggest that the methylation pattern of SNRPN in GCTs reflects that of the primordial germ cell giving rise to the tumor.

Original languageEnglish (US)
Pages (from-to)342-352
Number of pages11
JournalGenes Chromosomes and Cancer
Volume32
Issue number4
DOIs
StatePublished - 2001

ASJC Scopus subject areas

  • Genetics
  • Cancer Research

Fingerprint Dive into the research topics of 'SNRPN methylation patterns in germ cell tumors as a reflection of primordial germ cell development'. Together they form a unique fingerprint.

  • Cite this

    Bussey, K. J., Lawce, H. J., Himoe, E., Shu, X. O., Heerema, N. A., Perlman, E. J., Olson, S. B., & Magenis, R. E. (2001). SNRPN methylation patterns in germ cell tumors as a reflection of primordial germ cell development. Genes Chromosomes and Cancer, 32(4), 342-352. https://doi.org/10.1002/gcc.1199