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[Detection of gene expression alteration of myeloma cells treated with arsenic trioxide]
Cui-Lian Li1, Shi-Lun Chen, Wen-Ming Chen
1Department of Hematology, Chao Yang Hospital, Capital University of Medical Science, Beijing 100020, China.
Objective:
To investigate the effect of arsenic trioxide on multiple myeloma (MM) cell gene expression and explore the molecular mechanism of arsenic trioxide therapy for MM.
Methods:
U266 cells were divided into two groups, group A as control group and group B as test group. Cells were cultured for 48 hours, and total RNA and mRNA were extracted. Suppression subtractive hybridization (SSHs) was performed to distinguish the differentially expressed genes. The products were cloned into pGEM-T Easy Vector, and transfected into the competent host JM109 to construct two subtractive libraries. Positive colonies were selected by blue-white screening, and the plasmids were extracted. Homologous comparison was conducted in GenBank.
Results:
Five downregulated clones were isolated in the first SSH: (1) Aminopeptidase N, (2) Homosapiens tumor translationally-controlled protein 1, (3) Human ATP synthetase A chain, (4) Signal recognition particle A10, (5) Mitochondrial ATP synthetase/ATPase subunit 6. Four upregulated clones were isolated in the second SSH: (1) Calcium-binding protein A10, (2) Keratin 6A, (3) 45 kD MIP repetitive element containing splicing factor and (4) poly(A)-binding protein.
Conclusions:
Arsenic trioxide exerts proliferation inhibition and apoptosis induction on MM cells by regulating genes expression.
Insights
Arsenic trioxide impacts multiple myeloma (MM) cells by altering gene expression, inhibiting proliferation, and inducing apoptosis. This study identifies key downregulated and upregulated genes, revealing molecular mechanisms of MM therapy.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Multiple myeloma (MM) is a hematologic malignancy.
- Understanding the molecular mechanisms of therapeutic agents is crucial for effective treatment.
Purpose of the Study:
- To investigate the effect of arsenic trioxide on multiple myeloma (MM) cell gene expression.
- To explore the molecular mechanisms underlying arsenic trioxide therapy for MM.
Main Methods:
- U266 MM cells were cultured and divided into control and test groups.
- Suppression subtractive hybridization (SSH) was employed to identify differentially expressed genes.
- Gene expression profiles were analyzed, and homologous comparison was performed using GenBank.
Main Results:
- Five genes were found to be downregulated, including Aminopeptidase N and ATP synthetase subunits.
- Four genes were found to be upregulated, including Calcium-binding protein A10 and Keratin 6A.
- Differential gene expression patterns were observed in response to arsenic trioxide treatment.
Conclusions:
- Arsenic trioxide demonstrates antiproliferative and pro-apoptotic effects on MM cells.
- The therapeutic action of arsenic trioxide involves the regulation of specific gene expression.
- Identifying these gene expression changes provides insight into arsenic trioxide's mechanism of action in MM.
