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Published on: April 14, 2010
Gene expression profile analysis of SUDHL6 cells with siRNA-mediated BCL11A downregulation
Hong Wu1, Yangjun Gao, Li Ding
1Institute of Hematology, Medical College, Jinan University, Guangzhou, 510632, P. R. China.
Abstract:
Our previous study has shown that downregulation of B-cell chronic lymphocytic leukemia (CLL)/lymphoma11A (BCL11A) gene by small interfering RNA (siRNA) resulted in the growth inhibition and apoptosis of B cell lymphoma cell line SUDHL6. To gain further insight into the molecular mechanisms of this process and identify the differentially expressed genes in SUDHL6 cells after BCL11A downregulation, the global gene expression profile was identified and analyzed using the Affymetrix HG-U133 Plus 2.0 array. Twenty-one differentially expressed genes were validated and analyzed from the BCL11A siRNA-treated SUDHL6 cells. There was a significant dysregulation in the global gene expression of the BCL11A-suppressed SUDHL6 cells. There were 1903 genes differentially expressed with >2-fold changes between the BCL11A siRNA- and negative control-transfected cells. Of these, there were 916 upregulated genes and 987 downregulated genes. The differential genes are involved in various molecular functions and signaling pathways. QRT-PCR validation of the selected differentially expressed genes demonstrated there was a good correlation with the microarray analysis. There was a significant deregulation of expression in the apoptosis-related genes such as BCL-2, BCL2L11 and involved in TGFβ, MAPK, WNT signaling pathways after BCL11A was downregulated in SUDHL6 cells. Our results show that the suppression of BCL11A by RNA interference altered gene expression profile of SUDHL6 cells. The apoptosis-related genes BCL-2, BCL2L11 and the gene alterations in TGFβ, MAPK, WNT signaling pathways might be important in BCL11A siRNA-induced apoptosis of SUDHL6 cells, suggesting BCL11A is involved in gene networks associated with apoptosis.
Insights
Downregulating the BCL11A gene in lymphoma cells via siRNA triggers apoptosis and alters gene expression. Key apoptosis-related genes and signaling pathways like TGFβ, MAPK, and WNT are significantly affected, revealing BCL11A
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- Previous studies indicated BCL11A gene downregulation inhibits B-cell lymphoma cell growth and induces apoptosis.
- Understanding the molecular mechanisms of BCL11A suppression is crucial for B-cell lymphoma treatment strategies.
Purpose of the Study:
- To investigate the global gene expression profile in SUDHL6 cells following BCL11A downregulation.
- To identify specific genes and signaling pathways affected by BCL11A suppression in B-cell lymphoma.
Main Methods:
- Global gene expression profiling using Affymetrix HG-U133 Plus 2.0 array.
- Small interfering RNA (siRNA) mediated downregulation of BCL11A in SUDHL6 cells.
- Quantitative Reverse Transcription Polymerase Chain Reaction (QRT-PCR) for gene expression validation.
Main Results:
- BCL11A suppression led to significant global gene expression dysregulation in SUDHL6 cells.
- 1903 genes showed differential expression (>2-fold change), with 916 upregulated and 987 downregulated.
- Apoptosis-related genes (BCL-2, BCL2L11) and signaling pathways (TGFβ, MAPK, WNT) were significantly altered.
Conclusions:
- BCL11A downregulation by siRNA significantly alters the gene expression profile of SUDHL6 cells.
- Altered expression of apoptosis-related genes and involvement in TGFβ, MAPK, and WNT pathways suggest BCL11A's role in apoptosis regulation.
- BCL11A is implicated in gene networks associated with apoptosis in B-cell lymphoma.
