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Gene expression profiling of brain metastatic cell from triple negative breast cancer: Understanding the molecular
Li Zhou1, Hong-Fang Gao2, Ding-Sheng Liu1
1Department of Oncology and Hematology, Shanghai university of medicine & health Sciences Affiliated Zhoupu hospital, Shanghai 201318, China.
Abstract:
Brain metastatic triple negative breast cancer (BM-TNBC) is afflicted with unfavorable prognosis. However, the molecular events underlying BM-TNBC remain largely unknown. In the present study, we conducted gene expression microarray analysis using the triple negative breast cancer cell line MDA-MB-231 and its brain metastatic derivative (MDA-MB-231Brm). Results of microarray analysis showed that a total of 4296 genes were differentially expressed, of which 2433 genes were up-regulated and 1863 genes were down-regulated. Gene Ontology (GO), KEGG pathway and protein-protein interaction (PPI) analyses indicated differentially expressed genes functionally categorized as genes of signal transduction, multicellular organismal development, ion transport, nervous system development, plasma membrane, extracellular region, calcium ion binding, GTP binding neuroactive ligand-receptor interaction. The validity of the microarray results was verified by quantitative real-time PCR analysis of twelve representative genes. The present findings revealed molecular basis and events associated with brain metastasis in TNBC, which will potentially contribute to the understanding of underlying mechanism and develop therapeutic targets.
Insights
Researchers identified key molecular changes in brain metastatic triple-negative breast cancer (BM-TNBC). This study reveals genes and pathways involved in TNBC brain metastasis, offering potential therapeutic targets.
Area of Science:
- Molecular Biology
- Genomics
- Oncology
Background:
- Triple-negative breast cancer (TNBC) that metastasizes to the brain (BM-TNBC) has a poor prognosis.
- The molecular mechanisms driving BM-TNBC are not well understood.
- Identifying these mechanisms is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the molecular differences between TNBC cells and their brain-metastatic derivatives.
- To identify genes and pathways associated with brain metastasis in TNBC.
- To provide insights into the underlying mechanisms of BM-TNBC.
Main Methods:
- Gene expression microarray analysis was performed on MDA-MB-231 cells and their brain metastatic derivative MDA-MB-231Brm.
- Bioinformatic analyses including Gene Ontology (GO), KEGG pathway, and protein-protein interaction (PPI) were utilized.
- Quantitative real-time PCR (qRT-PCR) was used to validate microarray findings.
Main Results:
- Microarray analysis revealed 4296 differentially expressed genes (2433 upregulated, 1863 downregulated).
- Key functional categories included signal transduction, nervous system development, ion transport, and neuroactive ligand-receptor interactions.
- Validation by qRT-PCR confirmed the differential expression of selected genes.
Conclusions:
- This study elucidates the molecular landscape of brain metastasis in TNBC.
- The identified differentially expressed genes and pathways provide a foundation for understanding BM-TNBC.
- These findings may lead to the development of novel therapeutic strategies for BM-TNBC.