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Published on: October 19, 2014
Comparative genomic analyses of primary effusion lymphoma
B P Mullaney1, V L Ng, B G Herndier
1Department of Laboratory Medicine, University of California at San Francisco, 94143, USA.
Archives of Pathology & Laboratory Medicine
|June 3, 2000
Summary
Genomic aberrations are common in primary effusion lymphomas (PELs), a rare HIV-associated cancer. DNA copy number changes were observed in most PEL cases, but likely do not explain PEL
Area of Science:
- Oncology
- Virology
- Genetics
Background:
- Primary effusion lymphoma (PEL) is a rare, aggressive non-Hodgkin lymphoma associated with human immunodeficiency virus (HIV) and human herpesvirus 8 (HHV-8).
- Lymphomagenesis in PEL is thought to involve impaired immune surveillance, viral gene expression affecting hematopoietic regulation, and genomic alterations.
- Limited data exists on genome-wide aberrations in PEL, necessitating further investigation into its genetic landscape.
Purpose of the Study:
- To investigate genome-wide copy number alterations in primary effusion lymphomas (PELs).
- To identify recurrent regions of DNA sequence gain or loss in PEL cases.
- To compare genomic aberrations in PEL with other HIV-associated lymphomas.
Main Methods:
- Comparative genomic hybridization (CGH) was employed to analyze DNA copy number changes in 8 PEL cases.
- Forward and reverse hybridization, along with t-statistic analyses, were used to confirm identified regions of sequence loss or gain.
- This study represents the first genome-wide scan of copy number changes in these rare HIV-associated tumors.
Main Results:
- Genomic aberrations were detected in 6 out of 8 (75%) PEL cases studied.
- Recurrent gains of DNA sequence were observed on chromosome 12 (3/8 cases) and chromosome X (2/8 cases).
- Specific chromosomal regions identified include 12q22;12q23, 12q12;12q23, and Xp.
Conclusions:
- A majority of PEL cases exhibit DNA copy number changes, aligning with patterns seen in other HIV-associated lymphomas.
- These common genetic events may not be responsible for the unique characteristics of PEL.
- The findings provide a comprehensive genome-wide view of copy number alterations in PEL, contributing to understanding HIV-associated lymphoid malignancies.
