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Alterations of mRNA splicing in primary effusion lymphomas

Zongdong Li1, Langxing Pan, Ethel Cesarman

  • 1Department of Pathology and Laboratory Medicine, Weill Medical College of Cornell University, New York, NY 10021, USA.

Leukemia & Lymphoma
|June 14, 2003
PubMed

Insights

Primary effusion lymphoma (PEL), a cancer linked to KSHV/HHV-8, shows altered mRNA splicing. Viral infections like EBV may drive these splicing changes, potentially contributing to PEL development.

Area of Science:

  • Oncology
  • Virology
  • Molecular Biology

Background:

  • Primary effusion lymphoma (PEL) is a distinct malignancy associated with KSHV/HHV-8 and often EBV.
  • While viral infection is crucial, additional molecular events are likely necessary for PEL development.
  • Alternative splicing of pre-mRNA regulates gene expression and its deregulation can lead to cancer.

Purpose of the Study:

  • To investigate mRNA alternative splicing patterns in PEL.
  • To determine if viral infections influence mRNA splicing in PEL.
  • To explore the mechanisms by which viruses affect mRNA splicing.

Main Methods:

  • Examined mRNA splicing of DNA polymerase beta (pol beta), Bcl-x, and CD45 in eight PEL cell lines.
  • Compared splicing patterns in PEL cell lines with peripheral blood mononuclear cells (PBMC).
  • Investigated the effect of Epstein-Barr virus (EBV) infection on PBMC splicing and analyzed viral factors (KS-SM, SM, EBERs) in PEL splicing.

Main Results:

  • PEL cell lines exhibited a two-fold higher variant percentage of pol beta compared to PBMC.
  • Distinct splicing patterns for Bcl-x and CD45 were observed in PEL cell lines versus PBMC.
  • EBV infection increased pol beta variant percentage in PBMC, suggesting viruses can alter splicing.

Conclusions:

  • mRNA splicing is altered in PEL and can be influenced by viral infection.
  • These viral-induced splicing alterations may play a role in the pathogenesis of PEL.
  • Multiple regulatory factors likely mediate virus-induced mRNA alternative splicing.

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