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ATR alterations in Hodgkin's lymphoma
Angen Liu1, Tetsuya Takakuwa, Shigeki Fujita
1Department of Pathology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan.
Oncology Reports
|March 22, 2008
Summary
Alterations in the ATR gene, crucial for DNA repair, were found in Hodgkin
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- Hodgkin's lymphoma (HL) involves neoplastic Hodgkin and Reed-Sternberg cells (HRSC) within an inflammatory milieu.
- Oxidative stress from inflammation may induce DNA damage, potentially contributing to lymphomagenesis.
- Ataxia-telangiectasia mutated (ATM) and Rad3-related (ATR) genes are key responders to DNA damage.
Purpose of the Study:
- To investigate the potential role of the ATR gene in the pathogenesis of Hodgkin's lymphoma.
- To identify and characterize alterations in the ATR gene within HL cell lines and clinical samples.
Main Methods:
- Analysis of ATR gene alterations in 8 Hodgkin's lymphoma cell lines.
- Examination of ATR gene alterations in 7 clinical Hodgkin's lymphoma cases.
- Assessment of DNA double-strand break (DSB) and single-strand break (SSB) repair capacity.
- Evaluation of p53 accumulation in HL cells with ATR alterations.
Main Results:
- ATR alterations were detected in 6 out of 8 HL cell lines and 3 out of 7 clinical cases.
- Common alterations included heterozygous deletions, aberrant splicing, del exon 4, deletion exon 29-34, and insertion in exon 46/47.
- HL cells with ATR alterations (excluding del exon 4) exhibited impaired DNA break repair and defective p53 accumulation.
Conclusions:
- Alterations in the ATR gene are implicated in the pathogenesis of Hodgkin's lymphoma.
- These ATR gene alterations may contribute to lymphomagenesis by disrupting DNA damage response pathways.
