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[To knockdown survivin gene expression by siRNA in SO-Rb50 cells]
Li Nie1, Yong-ping Li, Dong Nie
1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.
Objective:
To investigate cell proliferation and apoptosis status of human retinoblastoma cell line SO-Rb50 after knockdown of Survivin gene by means of small interfering RNA (siRNA).
Methods:
Survivin specific siRNA designed from the human gene sequence and nonsense siRNA (as a negative control) was transfected into SO-Rb50 cells. The inhibition of the expression of Survivin mRNA and protein levels were detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot. Proliferation inhibition rate of SO-Rb50 cells was analyzed by MTT assay. Apoptotic rate and cell cycle were analyzed by flow cytometry (FCM) and the apoptotic morphology was observed by fluorescent microscope.
Results:
The expression of Survivin at both mRNA and protein level in specific siRNA group decreased significantly in comparison with untransfected group and nonsense siRNA group after 24 hours of transfection. The proliferation of SO-Rb50 was inhibited in the Survivin specific siRNA group at the concentrations of 35, 70 and 100 nmol/L (P < 0.05). Flow cytometry showed obvious apoptotic peak in Survivin specific group with an accumulation of cells in the G0/G1 phase and a decrease in G2/M phase and S phase. Typical apoptosis morphology was also observed under fluorescent microscope.
Conclusions:
Survivin specific siRNA could inhibit SO-Rb50 cell proliferation and induced apoptosis by knockdown of Survivin gene. Our data suggests that the use of Survivin-specific siRNA deserves further investigation as a novel approach to retinoblastoma therapy.
Insights
Survivin gene knockdown using small interfering RNA (siRNA) effectively inhibited retinoblastoma cell proliferation and induced apoptosis. This suggests siRNA targeting Survivin holds promise for retinoblastoma treatment.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Retinoblastoma is a common childhood eye cancer.
- Survivin is a protein that promotes cell survival and proliferation, often overexpressed in cancers.
- Targeting Survivin presents a potential therapeutic strategy for retinoblastoma.
Purpose of the Study:
- To investigate the effect of Survivin gene knockdown on the human retinoblastoma cell line SO-Rb50.
- To analyze the impact on cell proliferation and apoptosis using small interfering RNA (siRNA).
Main Methods:
- Transfection of SO-Rb50 cells with Survivin-specific siRNA or nonsense siRNA (control).
- Assessment of Survivin mRNA and protein levels via RT-PCR and Western blot.
- Analysis of cell proliferation (MTT assay), apoptosis (flow cytometry), and cell cycle distribution.
Main Results:
- Survivin expression significantly decreased at mRNA and protein levels post-transfection with specific siRNA.
- Survivin-specific siRNA inhibited SO-Rb50 cell proliferation in a dose-dependent manner.
- Flow cytometry revealed increased apoptosis and G0/G1 phase cell cycle arrest, with decreased G2/M and S phases.
Conclusions:
- Survivin-specific siRNA effectively inhibits retinoblastoma cell proliferation and induces apoptosis.
- Knockdown of the Survivin gene via siRNA is a potential therapeutic approach for retinoblastoma.
- Further investigation of Survivin-specific siRNA for retinoblastoma therapy is warranted.
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