TY - JOUR
T1 - A Case-Matched Gender Comparison Transcriptomic Screen Identifies eIF4E and eIF5 as Potential Prognostic Markers in Male Breast Cancer
AU - Humphries, Matthew P
AU - Sundara Rajan, Sreekumar
AU - Droop, Alastair
AU - Suleman, Charlotte A B
AU - Carbone, Carmine
AU - Nilsson, Cecilia
AU - Honarpisheh, Hedieh
AU - Cserni, Gabor
AU - Dent, Jo
AU - Fulford, Laura
AU - Jordan, Lee B
AU - Jones, J Louise
AU - Kanthan, Rani
AU - Litwiniuk, Maria
AU - Di Benedetto, Anna
AU - Mottolese, Marcella
AU - Provenzano, Elena
AU - Shousha, Sami
AU - Stephens, Mark
AU - Walker, Rosemary A
AU - Kulka, Janina
AU - Ellis, Ian O
AU - Jeffery, Margaret
AU - Thygesen, Helene H
AU - Cappelletti, Vera
AU - Daidone, Maria G
AU - Hedenfalk, Ingrid A
AU - Fjällskog, Marie-Louise
AU - Melisi, Davide
AU - Stead, Lucy F
AU - Shaaban, Abeer M
AU - Speirs, Valerie
N1 - ©2016 American Association for Cancer Research.
PY - 2017/5/15
Y1 - 2017/5/15
N2 - Purpose: Breast cancer affects both genders, but is understudied in men. Although still rare, male breast cancer (MBC) is being diagnosed more frequently. Treatments are wholly informed by clinical studies conducted in women, based on assumptions that underlying biology is similar.Experimental Design: A transcriptomic investigation of male and female breast cancer was performed, confirming transcriptomic data in silico Biomarkers were immunohistochemically assessed in 697 MBCs (n = 477, training; n = 220, validation set) and quantified in pre- and posttreatment samples from an MBC patient receiving everolimus and PI3K/mTOR inhibitor.Results: Gender-specific gene expression patterns were identified. eIF transcripts were upregulated in MBC. eIF4E and eIF5 were negatively prognostic for overall survival alone (log-rank P = 0.013; HR = 1.77, 1.12-2.8 and P = 0.035; HR = 1.68, 1.03-2.74, respectively), or when coexpressed (P = 0.01; HR = 2.66, 1.26-5.63), confirmed in the validation set. This remained upon multivariate Cox regression analysis [eIF4E P = 0.016; HR = 2.38 (1.18-4.8), eIF5 P = 0.022; HR = 2.55 (1.14-5.7); coexpression P = 0.001; HR = 7.04 (2.22-22.26)]. Marked reduction in eIF4E and eIF5 expression was seen post BEZ235/everolimus, with extended survival.Conclusions: Translational initiation pathway inhibition could be of clinical utility in MBC patients overexpressing eIF4E and eIF5. With mTOR inhibitors that target this pathway now in the clinic, these biomarkers may represent new targets for therapeutic intervention, although further independent validation is required. Clin Cancer Res; 23(10); 2575-83. ©2016 AACR.
AB - Purpose: Breast cancer affects both genders, but is understudied in men. Although still rare, male breast cancer (MBC) is being diagnosed more frequently. Treatments are wholly informed by clinical studies conducted in women, based on assumptions that underlying biology is similar.Experimental Design: A transcriptomic investigation of male and female breast cancer was performed, confirming transcriptomic data in silico Biomarkers were immunohistochemically assessed in 697 MBCs (n = 477, training; n = 220, validation set) and quantified in pre- and posttreatment samples from an MBC patient receiving everolimus and PI3K/mTOR inhibitor.Results: Gender-specific gene expression patterns were identified. eIF transcripts were upregulated in MBC. eIF4E and eIF5 were negatively prognostic for overall survival alone (log-rank P = 0.013; HR = 1.77, 1.12-2.8 and P = 0.035; HR = 1.68, 1.03-2.74, respectively), or when coexpressed (P = 0.01; HR = 2.66, 1.26-5.63), confirmed in the validation set. This remained upon multivariate Cox regression analysis [eIF4E P = 0.016; HR = 2.38 (1.18-4.8), eIF5 P = 0.022; HR = 2.55 (1.14-5.7); coexpression P = 0.001; HR = 7.04 (2.22-22.26)]. Marked reduction in eIF4E and eIF5 expression was seen post BEZ235/everolimus, with extended survival.Conclusions: Translational initiation pathway inhibition could be of clinical utility in MBC patients overexpressing eIF4E and eIF5. With mTOR inhibitors that target this pathway now in the clinic, these biomarkers may represent new targets for therapeutic intervention, although further independent validation is required. Clin Cancer Res; 23(10); 2575-83. ©2016 AACR.
KW - Adult
KW - Aged
KW - Aged, 80 and over
KW - Biomarkers, Tumor/genetics
KW - Breast Neoplasms/diagnosis
KW - Breast Neoplasms, Male/diagnosis
KW - Disease-Free Survival
KW - Eukaryotic Initiation Factor-4E/genetics
KW - Everolimus/administration & dosage
KW - Female
KW - Gene Expression Profiling
KW - Gene Expression Regulation, Neoplastic/drug effects
KW - Humans
KW - Imidazoles/administration & dosage
KW - Male
KW - Middle Aged
KW - Peptide Initiation Factors/genetics
KW - Prognosis
KW - Quinolines/administration & dosage
KW - RNA-Binding Proteins/genetics
KW - Sex Characteristics
KW - Transcriptome/genetics
U2 - 10.1158/1078-0432.CCR-16-1952
DO - 10.1158/1078-0432.CCR-16-1952
M3 - Article
C2 - 27986751
SN - 1078-0432
VL - 23
SP - 2575
EP - 2583
JO - Clinical Cancer Research
JF - Clinical Cancer Research
IS - 10
ER -