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Updated: Jan 7, 2026
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Clinicopathological Analysis of miRNA Expression in Breast Cancer Tissues by Using miRNA In Situ Hybridization
Published on: June 7, 2016
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INTEGRATED EXPRESSION PROFILE OF THE MMP-TIMP-MIRNA AXIS IN BREAST CANCER CELL LINES OF DIFFERENT MOLECULAR SUBTYPES
N Lukianova1, T Burda1, O Mushii1
1R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology, the NAS of Ukraine, Kyiv, Ukraine.
Experimental Oncology
|January 5, 2026
Summary
Breast cancer (BC) invasion depends on matrix metalloproteinases (MMPs) and tissue inhibitors (TIMPs). This study reveals subtype-specific MMP-TIMP-miRNA patterns in BC, highlighting post-transcriptional regulation for potential biomarkers.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Breast cancer (BC) invasion and metastasis are linked to extracellular matrix (ECM) remodeling.
- Matrix metalloproteinases (MMPs) and their inhibitors (TIMPs) regulate ECM remodeling.
- MicroRNAs (miRNAs) contribute to BC aggressiveness through post-transcriptional control of the MMP-TIMP axis.
Purpose of the Study:
- To investigate the expression profiles of MMPs, TIMPs, and regulatory miRNAs in different human breast cancer cell lines.
- To explore the subtype-specific patterns of the MMP-TIMP-miRNA axis in breast cancer.
- To understand the role of post-transcriptional regulation in breast cancer progression.
Main Methods:
- Analysis of collagenases (MMP-1, MMP-8, MMP-13), gelatinases (MMP-2, MMP-9), TIMP1-4, and selected miRNAs (miR-34a-5p, miR-100-5p, miR-132-3p, miR-145-5p, miR-155-5p, miR-200b-5p).
- Utilized immunocytochemistry and real-time PCR techniques.
- Studied four human breast cancer cell lines representing distinct molecular subtypes (MCF-7, T47D, MDA-MB-231, MDA-MB-468).
Main Results:
- Identified distinct subtype-specific expression patterns for MMPs, TIMPs, and miRNAs.
- Triple-negative BC cells showed higher collagenase and MMP9 expression, while luminal BC cells had maximal MMP2.
- Discrepancies between mRNA and protein levels suggest miRNA-mediated post-transcriptional regulation.
- Specific TIMP expression patterns and absence of TIMP3 in MDA-MB-231 cells were noted.
Conclusions:
- The MMP-TIMP-miRNA axis exhibits significant subtype-specific expression in breast cancer cell lines.
- Observed heterogeneity underscores the importance of post-transcriptional regulation in BC.
- Integrated profiling of MMPs, TIMPs, and miRNAs may offer novel insights into BC invasiveness and identify potential biomarkers.
