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Published on: September 18, 2013
Alterations of metastasis-related genes identified using an oligonucleotide microarray of genistein-treated HCC1395
Wen-Ying Lee1, Soon-Cen Huang, Ching-Cherng Tzeng
1Department of Pathology, Yung Kung Campus, Chi MeiMedical Center, Tainan, 710, Taiwan. 7707@so-net.net.tw
Abstract:
Genistein, one of the major isoflavones, potently inhibits the growth and metastasis of breast cancer. However, the precise molecular mechanism in metastasis inhibition is not clear. We investigated the effect of genistein in HCC1395 cells, a cell line derived from an early-stage primary breast cancer. Genistein dose dependently both decreased cell viability and inhibited the invasion potential. We used human oligonucleotide microarrays to determine the gene expression profile altered by genistein treatment. TFPI-2, ATF3, DNMT1, and MTCBP-1, which inhibit invasion and metastasis, were upregulated, and MMP-2, MMP-7, and CXCL12, which promote invasion and metastasis, were downregulated. We used quantitative real-time polymerase chain reaction to verify the microarray data at the mRNA level. We conclude that genistein-induced alternations of gene expression involving metastasis may be exploited for devising chemopreventive and therapeutic strategies, particularly for early-stage breast cancer.
Insights
Genistein, a soy isoflavone, inhibits breast cancer growth and metastasis by altering gene expression. This compound upregulates metastasis inhibitors and downregulates promoters, offering potential for early-stage breast cancer prevention and therapy.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Genistein is a major isoflavone with known potent effects on inhibiting breast cancer growth and metastasis.
- The precise molecular mechanisms underlying genistein's anti-metastatic properties remain incompletely understood.
- Investigating these mechanisms is crucial for developing effective chemopreventive and therapeutic strategies.
Purpose of the Study:
- To elucidate the molecular mechanisms by which genistein inhibits breast cancer metastasis.
- To determine the effect of genistein on gene expression profiles in breast cancer cells.
- To identify specific genes and pathways modulated by genistein relevant to invasion and metastasis.
Main Methods:
- Utilized HCC1395 cells, a cell line from early-stage primary breast cancer.
- Administered genistein in a dose-dependent manner to assess its effects on cell viability and invasion.
- Employed human oligonucleotide microarrays for comprehensive gene expression profiling.
- Verified microarray findings using quantitative real-time polymerase chain reaction (qRT-PCR) for mRNA level analysis.
Main Results:
- Genistein demonstrated a dose-dependent decrease in HCC1395 cell viability.
- Genistein significantly inhibited the invasion potential of breast cancer cells.
- Microarray analysis revealed upregulation of metastasis inhibitors (TFPI-2, ATF3, DNMT1, MTCBP-1).
- Microarray analysis revealed downregulation of metastasis promoters (MMP-2, MMP-7, CXCL12).
- qRT-PCR confirmed the differential gene expression patterns observed in the microarray analysis.
Conclusions:
- Genistein effectively inhibits breast cancer cell viability and invasion.
- Genistein modulates the expression of key genes involved in cancer metastasis.
- These genistein-induced gene expression alterations hold promise for developing chemopreventive and therapeutic interventions for early-stage breast cancer.
