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Published on: September 8, 2017
CHCHD2 decreases docetaxel sensitivity in breast cancer via activating MMP2
1Department of Breast Surgery, the First Hospital of Jilin University, Changchun, China. 234591611@qq.com.
Objective:
This study aims to clarify the influences of CHCHD2 and MMP2 on docetaxel resistance in breast cancer.
Patients And Methods:
Differential levels of CHCHD2 in breast cancer and para-tumor tissues were detected. The relationship between CHCHD2 and prognosis in breast cancer patients was analyzed. After generating Docetaxel-resistant breast cancer cell lines (MCF-7/DTX and SKBR3/DTX), the regulatory effects of CHCHD2 on proliferative and migratory potentials were assessed by Cell Counting Kit-8 (CCK-8) and transwell assay, respectively. The interaction between CHCHD2 and MMP2 was tested by Western blot and Pearson correlation test. At last, the involvement of MMP2 in CHCHD2-regulated proliferation and migration in Docetaxel-resistant breast cancer cells was analyzed.
Results:
CHCHD2 was upregulated in breast cancer tissues. It predicted high incidence of distant metastasis and poor prognosis in breast cancer patients. Proliferation inhibition rate was lower in MCF-7/DTX and SKBR3/DTX cells compared with their parental cells. After knockdown of CHCHD2 in MCF-7/DTX and SKBR3/DTX cells, their proliferative and migratory potentials were markedly reduced. MMP2 was upregulated in breast cancer tissues, and its level was positively regulated by CHCHD2. Overexpression of MMP2 could reverse the regulatory effects of CHCHD2 on proliferative and migratory potentials in MCF-7/DTX and SKBR3/DTX cells.
Conclusions:
Upregulated CHCHD2 in breast cancer is related to distant metastasis rate and poor prognosis. CHCHD2 and MMP2 are positively correlated to each other. CHCHD2 stimulates proliferative and migratory potentials in Docetaxel-resistant breast cancer cells by upregulating MMP2.
Insights
This study reveals that elevated CHCHD2 (a protein) promotes docetaxel resistance in breast cancer by increasing MMP2 levels, leading to greater proliferation and metastasis. Targeting CHCHD2 may offer a new strategy for overcoming treatment resistance.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Docetaxel is a key chemotherapy for breast cancer, but resistance limits its efficacy.
- Understanding the molecular mechanisms of docetaxel resistance is crucial for improving patient outcomes.
- CHCHD2 and MMP2 are implicated in cancer progression, but their specific roles in docetaxel resistance require clarification.
Purpose of the Study:
- To investigate the role of CHCHD2 and MMP2 in the development of docetaxel resistance in breast cancer.
- To explore the relationship between CHCHD2, MMP2, and breast cancer prognosis.
- To elucidate the mechanism by which CHCHD2 influences proliferation and migration in docetaxel-resistant breast cancer cells.
Main Methods:
- Differential expression analysis of CHCHD2 in breast cancer tissues.
- Prognostic analysis of CHCHD2 in breast cancer patients.
- Generation of docetaxel-resistant breast cancer cell lines (MCF-7/DTX, SKBR3/DTX).
- Assessment of cell proliferation (CCK-8) and migration (Transwell assay) after CHCHD2 knockdown.
- Western blot and Pearson correlation to analyze CHCHD2 and MMP2 interaction.
- Evaluation of MMP2's role in CHCHD2-mediated effects in resistant cells.
Main Results:
- CHCHD2 was significantly upregulated in breast cancer tissues and correlated with increased distant metastasis and poorer prognosis.
- Docetaxel-resistant cells exhibited reduced proliferation inhibition rates.
- Knockdown of CHCHD2 in resistant cells markedly decreased their proliferative and migratory potentials.
- MMP2 was also upregulated and positively regulated by CHCHD2.
- Overexpression of MMP2 reversed the effects of CHCHD2 knockdown on proliferation and migration in resistant cells.
Conclusions:
- Upregulated CHCHD2 is associated with poor prognosis and distant metastasis in breast cancer.
- CHCHD2 and MMP2 levels are positively correlated.
- CHCHD2 enhances proliferation and migration in docetaxel-resistant breast cancer cells, primarily through the upregulation of MMP2.
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