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Updated: Aug 20, 2026
Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle
Published on: March 5, 2019
[Study on the targeting effects of M1-GS RNA on K562 cells]
Bo-bin Chen1, Guo-wei Lin, Hua-zhong Lu
1Department of Hematology, Huashan Hospital, Fudan University, Shanghai 200040, China.
Objective:
To determine the effects of M1-GS RNA (M1 RNA) on bcr-abl mRNA and oncoprotein after M1 RNA with guide sequence (M1-GS RNA) targeting the oncogene was transfected into K562 cells.
Methods:
pAVGS4 (an eukaryocyte expression vector containing M1-GS RNA sequence) and pNAV-1 (as the control) were transfected into K562 cells by X-tremeGENE Q2. Total RNA was extracted at 24, 48, 72 and 96 hours after transfection. Then RT-PCR was done to compare the products at different time point. After collecting pAVGS4-transfected cells and the control cells at 48 and 96 hours after transfection, total protein was extracted and quantified. Change of P210 was determined by Western blot. Colony formation was analyzed at 96 hours after transfection.
Results:
RT-PCR based on transfected cells at different time point showed that the amount of bcr-abl mRNA began to decrease at 24 hours and reduced to 9.2% and 2.5% respectively at 48 and 72 hours after transfection. Western blot showed that the expression of P210 in the pAVGS4 group reduced to 10.4% of the control at 48 hours and 6.7% of the control at 96 hours after transfection. The inhibition rate of colony formation was 81.3% after K562 cells were transfected by pAVGS4.
Conclusion:
pAVGS4 can efficiently destroy bcr-abl mRNA in K562 cells. The transcript level of bcr-abl mRNA was reduced with the time after transfection. The expression of P210 was decreased significantly at 48 and 96 hours after transfection. K562 cell colony formation was prominently inhibited.
Insights
M1-GS RNA efficiently degrades bcr-abl mRNA and reduces P210 oncoprotein in K562 cells, significantly inhibiting colony formation. This targeted approach offers a promising strategy for cancer therapy.
Area of Science:
- Molecular Biology
- RNA Interference
- Cancer Genetics
Context:
- K562 cells are a human chronic myeloid leukemia cell line.
- The BCR-ABL oncogene drives the proliferation of CML cells.
- Targeting BCR-ABL is a key strategy in CML treatment.
Purpose:
- To evaluate the efficacy of M1-GS RNA in targeting and reducing bcr-abl mRNA and P210 oncoprotein expression.
- To assess the impact of M1-GS RNA transfection on K562 cell proliferation and colony formation.
Summary:
- Transfection of K562 cells with M1-GS RNA (pAVGS4) led to a time-dependent decrease in bcr-abl mRNA levels, reaching 9.2% and 2.5% at 48 and 72 hours, respectively.
- Western blot analysis revealed significant reduction in P210 oncoprotein expression to 10.4% and 6.7% of control levels at 48 and 96 hours post-transfection.
- M1-GS RNA transfection resulted in an 81.3% inhibition of K562 cell colony formation.
Impact:
- M1-GS RNA effectively degrades bcr-abl mRNA and suppresses P210 oncoprotein in K562 cells.
- The study demonstrates the potential of M1-GS RNA as a therapeutic agent for CML by inhibiting cancer cell growth.
- This research provides a foundation for developing novel RNA-based therapies targeting specific oncogenes.
