Roles of miR-20a-5p in breast cancer based on the clinical and multi-omic (CAMO) cohort and in vitro studies

被引:0
|
作者
Tylden, Eline Sol [1 ]
Delgado, Andre Berli [1 ]
Lukic, Marko [2 ]
Moi, Line [3 ]
Busund, Lill-Tove Rasmussen [1 ,3 ]
Pedersen, Mona Irene [4 ]
Lombardi, Ana Paola [1 ]
Olsen, Karina Standahl [2 ]
机构
[1] UiT Arctic Univ Norway, Fac Hlth Sci, Dept Med Biol, Tromso, Norway
[2] UiT Arctic Univ Norway, Fac Hlth Sci, Dept Community Med, Tromso, Norway
[3] Univ Hosp North Norway, Dept Clin Pathol, Tromso, Norway
[4] UiT Arctic Univ Norway, Fac Hlth Sci, Dept Clin Med, Tromso, Norway
来源
SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期
关键词
Breast cancer; miR-20a-5p; microRNA; miRNA; Biomarker; Epidemiology; Tissue microarray; In situ hybridization; Translational research; NORWEGIAN WOMEN; GENE-EXPRESSION; MICRORNAS; CELLS; TRANSCRIPTION; RECEPTOR; GROWTH;
D O I
10.1038/s41598-024-75557-0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
MicroRNAs are involved in breast cancer development and progression, holding potential as biomarkers and therapeutic targets or tools. The roles of miR-20a-5p, a member of the oncogenic miR-17-92 cluster, remain poorly understood in the context of breast cancer. In this study, we elucidate the role of miR-20a-5p in breast cancer by examining its associations with breast cancer risk factors and clinicopathological features, and its functional roles in vitro. Tissue microarrays from 313 CAMO cohort breast cancer surgical specimens were constructed, in situ hybridization was performed and miR-20a-5p expression was semiquantitatively scored in tumor stromal fibroblasts, and in the cytoplasm and nuclei of cancer cells. In vitro analysis of the effect of miR-20a-5p transfection on proliferation, migration and invasion was performed in three breast cancer cell lines. High stromal miR-20a-5p was associated with higher Ki67 expression, and higher odds of relapse, compared to low expression. Compared to postmenopausal women, women who were premenopausal at diagnosis had higher odds of high stromal and cytoplasmic miR-20a-5p expression. Cytoplasmic miR-20a-5p was significantly associated with tumor grade. In tumors with high cytoplasmic miR-20a-5p expression compared to low expression, there was a tendency towards having a basal-like subtype and high Ki67. In contrast, high nuclear miR-20a-5p in cancer cells was associated with smaller tumor size and lower odds of lymph node metastasis, compared to low nuclear expression. Transfection with miR-20a-5p in breast cancer cell lines led to increased migration and invasion in vitro. While the majority of our results point towards an oncogenic role, some of our findings indicate that the associations of miR-20a-5p with breast cancer related risk factors and outcomes may vary based on tissue- and subcellular location. Larger studies are needed to validate our findings and further investigate the clinical utility of miR-20a-5p.
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页数:18
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