title: High Expression of Three-Gene Signature Improves Prediction of Relapse-Free Survival in Estrogen Receptor-Positive and Node-Positive Breast Tumors.
abstract: The objective of the present study was to validate prognostic gene signature for estrogen receptor alpha-positive (ER03B1+) and lymph node (+) breast cancer for improved selection of patients for adjuvant therapy. In our previous study, we identified a group of seven genes (GATA3, NTN4, SLC7A8, ENPP1, MLPH, LAMB2, and PLAT) that show elevated messenger RNA (mRNA) expression levels in ERα (+) breast cancer patient samples. The prognostic values of these genes were evaluated using gene expression data from three public data sets of breast cancer patients (n = 395). Analysis of ERα (+) breast cancer cohort (n = 195) showed high expression of GATA3, NTN4, and MLPH genes significantly associated with longer relapse-free survival (RFS). Next cohort of ERα (+) and node (+) samples (n = 109) revealed high mRNA expression of GATA3, SLC7A8, and MLPH significantly associated with longer RFS. Multivariate analysis of combined three-gene signature for ERα (+) cohort, and ERα (+) and node (+) cohorts showed better hazard ratio than individual genes. The validated three-gene signature sets for ERα (+) cohort, and ERα (+) and node (+) cohort may have potential clinical utility since they demonstrated predictive and prognostic ability in three independent public data sets.
authors.affiliation: Piramal Life Sciences Ltd, Nirlon Complex, Goregaon (E), Mumbai, India. ; Western University of Health Sciences, Pomona, CA, USA.
authors.forename: Arvind
authors.initials: A
authors.lastname: Thakkar
authors.affiliation: Apollo Speciality Hospital, Chennai, Tamil Nadu, India.
authors.forename: Hemanth
authors.initials: H
authors.lastname: Raj
authors.affiliation: Apollo Speciality Hospital, Chennai, Tamil Nadu, India.
authors.lastname: Ravishankar
authors.affiliation: Vellore Institute of Technology University, Vellore, Tamil Nadu, India.
authors.forename: Bhaskaran
authors.initials: B
authors.lastname: Muthuvelan
authors.affiliation: Piramal Life Sciences Ltd, Nirlon Complex, Goregaon (E), Mumbai, India.
authors.forename: Arun
authors.initials: A
authors.lastname: Balakrishnan
authors.affiliation: Piramal Life Sciences Ltd, Nirlon Complex, Goregaon (E), Mumbai, India.
authors.forename: Muralidhara
authors.initials: M
authors.lastname: Padigaru
keywords: biomarkers; breast cancer; estrogen receptor; gene signature; lymph node positive; prognosis; relapse-free survival