Background: Chickpea isoflavones have been demonstrated to play an inhibitory role in breast cancer cells. In this study, we aimed to explore the mechanism of chickpea isoflavones inhibiting the formation and development of breast carcinoma through the integration of wet and dry experiments.
Methods: Chickpea isoflavones were added to the MCF-7 cells for 48 hours, and the subsequent morphological changes of cells were observed using an inverted microscope, while apoptosis was quantified by flow cytometry. The mRNA and LncRNA expression profiles were detected by RNA-sequencing (RNA-Seq) technology. The protein-protein interaction (PPI) network was constructed from the STRINGdb database. To identify the co-expressed long non-coding RNA and messenger RNA (lncRNA-mRNA) pairs, Pearson's correlation coefficients were calculated based on the expression value between every differentially expressed lncRNA and mRNA pair. The hub gene expression was verified by quantitative reverse transcription polymerase chain reaction (qRT-PCR), and survival analysis results were provided by The Human Protein Atlas website.
Results: Microscopic observation and flow cytometry results confirmed that chickpea isoflavones with a final concentration of 32.8 µg/mL could cause apoptosis of the MCF-7 cells. Transcriptome results showed that a total of 1,094 mRNAs and 378 lncRNAs were differentially expressed in isoflavone-treated cells. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment revealed that inhibition of cell proliferation was mainly due to the up-regulation of genes in the apoptosis signaling pathway and the down-regulation of genes in mRNA splicing pathway. The co-expressed genes of the top 10 down-regulated lncRNAs were mainly heterogeneous nuclear ribonucleoproteins (HNRNP) family genes, which interacted with apoptosis-related genes through ubiquitin C (UBC). The abnormal expression of 11 hub genes (degree >10) of PPI networks were beneficial to improve the overall survival time of breast cancer patients.
Conclusions: Our results reveal a potential mechanism for chickpea isoflavones to inhibit MCF-7 breast cancer cell proliferation and provide a reference for the development of new anti-cancer drugs used in breast cancer.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7048992 | PMC |
| http://dx.doi.org/10.21037/atm.2019.12.141 | DOI Listing |
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