Effect of CDK2-AP1 gene over-expression on proliferation and cell cycle regulation of breast cancer cell line MCF-7 / 中南大学学报(医学版)
Journal of Central South University(Medical Sciences)
;
(12): 990-996, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-814737
ABSTRACT
OBJECTIVE@#To over-express cyclin-dependent kinase 2-associated protein 1 (CDK2-AP1) gene, and investigate its effect on the proliferation and cell cycle regulation in breast cancer cell line MCF-7.@*METHODS@#CDK2-AP1 gene coding region was cloned into lentivirus vector. Lentivirus particles were infected into MCF-7 cells to upregulate the expression of CDK2-AP1 gene. The expression level of CDK2-AP1 was detected at both mRNA and protein levels by real-time PCR and Western blot. MTT assay, colony formatting assay, and flow cytometry were performed to detect the change of proliferation and cell cycle in MCF-7 cells. We examined the expression of cell cycle associated genes (CDK2, CDK4, P16Ink4A, and P21Cip1/Waf1) followed by CDK2-AP1 over-expression by Western blot.@*RESULTS@#CDK2-AP1 gene was up-regulated significantly at both mRNA (6.94 folds) and protein level. MTT based growth curve, colony formatting assay and flow cytometry showed that CDK2-AP1 over-expression lentivirus inhibited the proliferation of MCF-7 cells with statistical difference (P<0.05). In addition, with CDK2-AP1 over-expression, MCF-7 cells were arrested in G1 phase accompanied by apoptosis. Western blot showed that the expression level of P21Cip1/Waf1 and P16 Ink4A was upregulated, while the expression level of CDK2 and CDK4, members of the CDK family, was downregulated.@*CONCLUSION@#CDK2-AP1 gene plays a cancer suppressor role in breast cancer. Its function includes inhibiting the proliferation of MCF-7 cells and arresting the cell cycle in G1 phase.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Protein Kinases
/
Breast Neoplasms
/
Down-Regulation
/
Cell Cycle
/
Cell Division
/
Cyclin-Dependent Kinases
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Tumor Suppressor Proteins
/
Cell Proliferation
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MCF-7 Cells
/
Genetics
Limits:
Humans
Language:
Chinese
Journal:
Journal of Central South University(Medical Sciences)
Year:
2012
Type:
Article
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