title: Correlative Analysis of miRNA Expression and Oncotype Dx Recurrence Score in Estrogen Receptor Positive Breast Carcinomas.
abstract: Altered expression of miRNAs has been observed in many types of cancer, including breast cancer, and shown to contribute to cancer growth, aggressiveness, and response to therapies. In this pilot study, we investigated the possible correlation of miRNAs with risk of recurrence of estrogen receptor positive, lymph node-negative mammary carcinomas as determined by the Oncotype DX® Breast Cancer assay. To accomplish this, we extracted RNA from a collection of breast carcinomas that had previously been analyzed by Oncotype DX®. Multiple Let-7 family members were negatively correlated with the recurrence score (RS), which is consistent with their tumor suppressor properties. Additional miRNAs were found to positively correlate with RS, including miR-377-5p, miR-633b, miR-548t and miR-3648. Pathway analysis of putative and validated targets suggests that these miRNAs may have a diverse range of functions that may contribute to tumor recurrence. Taken together, these findings provide evidence that a miRNA expression signature can be developed to aid existing methods to determine the risk of recurrence for women with estrogen receptor positive breast cancers treated with endocrine therapy.
authors.affiliation: Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Rajyasree
authors.initials: R
authors.lastname: Emmadi
authors.affiliation: Center for Pharmaceutical Biotechnology, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Emanuele
authors.initials: E
authors.lastname: Canestrari
authors.affiliation: Core Genomics Facility, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Zarema H
authors.initials: ZH
authors.lastname: Arbieva
authors.affiliation: Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Mu
authors.affiliation: Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Yang
authors.initials: Y
authors.lastname: Dai
authors.affiliation: Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Jonna
authors.initials: J
authors.lastname: Frasor
authors.affiliation: Department of Pathology, University of Illinois at Chicago, Chicago, Illinois, United States of America.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Wiley
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000235:genetics; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D005260:Female; D020869:Gene Expression Profiling / Q000379:methods; D006801:Humans; D019394:Ki-67 Antigen / Q000235:genetics; D035683:MicroRNAs / Q000235:genetics*; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000235:genetics* / Q000473:pathology; D011379:Prognosis; D011960:Receptors, Estrogen / Q000235:genetics*; D012189:Retrospective Studies; D018570:Risk Assessment
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D035683:MicroRNAs; D011960:Receptors, Estrogen