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Published on: January 12, 2020
[Effect of CRE-dependent RNA interference targeting Notch1 on proliferation of cervical cancer cell line HeLa]
Hai Yu1, Sheng-Lin Huang, Xiao-Ping Zhao
1Research Center for Human Gene Therapy, Department of Biochemistry and Molecular Biology, School of Medicine, Shanghai Jiaotong University, Shanghai, PR China.
Background & Objective:
Notch signal transduction pathway mediates cell differentiation and proliferation. Its dysfunction is supposed to be involved in tumorigenesis and development. This study was to construct a course recombination enzyme(CRE)-dependent short hairpin RNA (shRNA) expression plasmid targeting Notch1, and investigate its effect on proliferation of cervical cancer cell line HeLa.
Methods:
RNA interfering vectors pSico and pSicoR were used to construct CRE-dependent shRNA expression plasmids targeting GAPDH and Notch1; pBS185-CRE was used as an expression vector of CRE. HeLa cells were divided into 4 groups and transfected with pSico, pSico/CRE, pSicoR, and pSicoR/CRE, respectively. Reverse transcription-polymerase chain reaction (RT-PCR) and Western blot were carried out to assess the efficiency of RNA interference (RNAi), and intracellular Notch signal level was tested by CBF-1 reporter plasmid. The proliferation of HeLa cells after CRE-dependent Notch1 RNAi was detected by MTS assay.
Results:
After transfection of pSico (R)-GAPDH and pSico (R)-Notch1, CRE-dependent green fluorescent cells were detected; Notch1 expression was inhibited; intracellular Notch1 signal level was decreased; the proliferation of HeLa cells was suppressed.
Conclusion:
RNAi of Notch1 mediated by CRE-dependent shRNA expression plasmid can down-regulate intracellular Notch1 signal level and suppress the proliferation of HeLa cells.
Insights
This study demonstrates that RNA interference targeting Notch1 in cervical cancer cells effectively reduces Notch1 signaling and suppresses cell proliferation. This highlights Notch1 as a potential therapeutic target for cervical cancer.
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Signaling
Context:
- The Notch signaling pathway plays a crucial role in cell differentiation and proliferation.
- Dysregulation of Notch signaling is implicated in tumorigenesis and cancer development.
- Cervical cancer progression involves uncontrolled cell proliferation.
Purpose:
- To construct a Cre-recombinase (CRE)-dependent short hairpin RNA (shRNA) expression plasmid targeting Notch1.
- To investigate the effect of Notch1 inhibition on the proliferation of HeLa cervical cancer cells.
Summary:
- CRE-dependent shRNA expression plasmids targeting Notch1 and GAPDH were constructed.
- HeLa cells were transfected with these plasmids and a CRE expression vector.
- Notch1 expression and signaling were successfully inhibited, leading to suppressed HeLa cell proliferation.
Impact:
- RNA interference (RNAi) targeting Notch1 effectively down-regulates Notch1 signaling.
- Notch1 inhibition suppresses the proliferation of cervical cancer cells.
- This provides a potential strategy for targeting Notch1 in cervical cancer therapy.
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