Identification of abrogated pathways in fallopian tube epithelium from BRCA1 mutation carriers

Sophia George, James Greenaway, Anca Milea, Victoria Clary, Sanjeev Shaw, Monika Sharma, Carl Virtanen, Patricia A. Shaw

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The discovery of occult invasive and intra-epithelial tubal carcinomas in BRCA1 mutation carriers undergoing prophylactic surgery has implicated the fallopian tube epithelium as the source of serous cancer. However, little is known of the early molecular events of serous oncogenesis, or why cancers in BRCA1 mutation carriers are found preferentially in tissues which are responsive to reproductive hormones. We hypothesize that molecular alterations present in morphologically normal tubal epithelium from BRCA1 heterozygotes reflect the earliest events in serous carcinogenesis and may be markers of increased cancer risk as well as targets for risk reduction. Genetic profiling of microdissected tubal epithelium from histologically normal BRCA1 mutation carriers and controls was performed. We sought to define a signature which differentiated BRCA1 mutant tubal epithelium from women with low risk of developing ovarian cancer. Molecular differences between the follicular and luteal phases were prominent and, by using filtering techniques and a two-way ANOVA without a False Discovery Rate correction, we identified 440 probe sets with a more than two-fold change in gene expression related to BRCA1 mutation status. Using gene ontology and known associations to cancer pathways, we selected five genes for further analysis by qPCR and immunohistochemistry, and were able to demonstrate statistically significant differentiation of BRCA1 and control cases in an independent set of cases. The altered expression profiles in histologically normal tubal epithelium from BRCA1 heterozygotes suggest that these cells may respond differently to microenvironmental stresses.

Original languageEnglish (US)
Pages (from-to)106-117
Number of pages12
JournalJournal of Pathology
Volume225
Issue number1
DOIs
StatePublished - Sep 2011
Externally publishedYes

Fingerprint

Fallopian Tubes
Epithelium
Mutation
Heterozygote
Neoplasms
Carcinogenesis
Gene Ontology
Follicular Phase
Luteal Phase
Risk Reduction Behavior
Ovarian Neoplasms
Analysis of Variance
Immunohistochemistry
Hormones
Carcinoma
Gene Expression
Genes

Keywords

  • BRCA1
  • C/EBP-δ
  • fallopian tube
  • GADD45-β
  • NAMPT
  • serous carcinoma
  • STAT3

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

George, S., Greenaway, J., Milea, A., Clary, V., Shaw, S., Sharma, M., ... Shaw, P. A. (2011). Identification of abrogated pathways in fallopian tube epithelium from BRCA1 mutation carriers. Journal of Pathology, 225(1), 106-117. https://doi.org/10.1002/path.2927

Identification of abrogated pathways in fallopian tube epithelium from BRCA1 mutation carriers. / George, Sophia; Greenaway, James; Milea, Anca; Clary, Victoria; Shaw, Sanjeev; Sharma, Monika; Virtanen, Carl; Shaw, Patricia A.

In: Journal of Pathology, Vol. 225, No. 1, 09.2011, p. 106-117.

Research output: Contribution to journalArticle

George, S, Greenaway, J, Milea, A, Clary, V, Shaw, S, Sharma, M, Virtanen, C & Shaw, PA 2011, 'Identification of abrogated pathways in fallopian tube epithelium from BRCA1 mutation carriers', Journal of Pathology, vol. 225, no. 1, pp. 106-117. https://doi.org/10.1002/path.2927
George, Sophia ; Greenaway, James ; Milea, Anca ; Clary, Victoria ; Shaw, Sanjeev ; Sharma, Monika ; Virtanen, Carl ; Shaw, Patricia A. / Identification of abrogated pathways in fallopian tube epithelium from BRCA1 mutation carriers. In: Journal of Pathology. 2011 ; Vol. 225, No. 1. pp. 106-117.
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