Radiation-Induced Gene Expression Changes in High and Low Grade Breast Cancer Cell Types

被引:25
作者
Bravata, Valentina [1 ]
Cava, Claudia [2 ]
Minafra, Luigi [1 ]
Cammarata, Francesco Paolo [1 ]
Russo, Giorgio [1 ]
Gilardi, Maria Carla [1 ,2 ]
Castiglioni, Isabella [2 ]
Forte, Giusi Irma [1 ]
机构
[1] CNR, Inst Mol Bioimaging & Physiol, I-90015 Cefalu, Pa, Italy
[2] CNR, Inst Mol Bioimaging & Physiol, I-20090 Segrate, Mi, Italy
关键词
ionizing radiation; breast cancer; gene expression profile; pathway analysis; EPITHELIAL-MESENCHYMAL TRANSITION; IONIZING-RADIATION; INTRAOPERATIVE RADIOTHERAPY; ESTROGEN-RECEPTOR; MCF-7; CELLS; LINES; GROWTH; TUMOR; CLASSIFICATION; RELEVANCE;
D O I
10.3390/ijms19041084
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Background: There is extensive scientific evidence that radiation therapy (RT) is a crucial treatment, either alone or in combination with other treatment modalities, for many types of cancer, including breast cancer (BC). BC is a heterogeneous disease at both clinical and molecular levels, presenting distinct subtypes linked to the hormone receptor (HR) status and associated with different clinical outcomes. The aim of this study was to assess the molecular changes induced by high doses of ionizing radiation (IR) on immortalized and primary BC cell lines grouped according to Human epidermal growth factor receptor (HER2), estrogen, and progesterone receptors, to study how HR status influences the radiation response. Our genomic approach using in vitro and ex-vivo models (e.g., primary cells) is a necessary first step for a translational study to describe the common driven radio-resistance features associated with HR status. This information will eventually allow clinicians to prescribe more personalized total doses or associated targeted therapies for specific tumor subtypes, thus enhancing cancer radio-sensitivity. Methods: Nontumorigenic (MCF10A) and BC (MCF7 and MDA-MB-231) immortalized cell lines, as well as healthy (HMEC) and BC (BCpc7 and BCpcEMT) primary cultures, were divided into low grade, high grade, and healthy groups according to their HR status. At 24 h post-treatment, the gene expression profiles induced by two doses of IR treatment with 9 and 23 Gy were analyzed by cDNA microarray technology to select and compare the differential gene and pathway expressions among the experimental groups. Results: We present a descriptive report of the substantial alterations in gene expression levels and pathways after IR treatment in both immortalized and primary cell cultures. Overall, the IR-induced gene expression profiles and pathways appear to be cell-line dependent. The data suggest that some specific gene and pathway signatures seem to be linked to HR status. Conclusions: Genomic biomarkers and gene-signatures of specific tumor subtypes, selected according to their HR status and molecular features, could facilitate personalized biological-driven RT treatment planning alone and in combination with targeted therapies.
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页数:15
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