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Published on: December 4, 2018

Mutation analysis of NF-κB signal pathway-related genes in ocular MALT lymphoma

Fang Liu1, Kennosuke Karube, Harumi Kato

  • 1Division of Molecular Medicine, Aichi Cancer Center Research Institute, Nagoya, Japan.

International Journal of Clinical and Experimental Pathology
|July 19, 2012
PubMed

Insights

Ocular adnexal lymphoma (OAL) shows constitutive nuclear factor-kappa B (NF-κB) activation. Genetic alterations in key NF-κB pathway genes were not found in OAL, suggesting other mechanisms are involved.

Area of Science:

  • Oncology
  • Genetics
  • Immunology

Background:

  • Constitutive nuclear factor-kappa B (NF-κB) activation is observed in ocular adnexal lymphoma (OAL).
  • TNFAIP3/A20, a NF-κB inhibitor, is frequently lost in OAL, implicating it in lymphomagenesis.
  • Mechanisms driving NF-κB activity in OAL are not fully understood.

Purpose of the Study:

  • To investigate the mutation status of NF-κB canonical pathway genes (CARD11, CD79B, MYD88) in OAL.
  • To determine if these mutations contribute to NF-κB activation in OAL, particularly in cases with 6q23.3 loss.

Main Methods:

  • Direct sequencing was used to analyze the mutation status of CARD11, CD79B, and MYD88 genes.
  • The study included 24 OAL cases, with 9 previously identified as having 6q23.3 loss via array comparative genomic hybridization.

Main Results:

  • No genetic alterations were found in the analyzed NF-κB canonical pathway genes (CARD11, CD79B, MYD88) in OAL cases.
  • This finding contrasts with observations in other B-cell lymphomas where these genes are frequently mutated.

Conclusions:

  • The pathogenesis of OAL does not appear to involve mutations in CARD11, CD79B, or MYD88.
  • Alternative genetic or epigenetic alterations in other genes are likely responsible for NF-κB activation in OAL, especially in cases without TNFAIP3/A20 loss.
Keywords:
NF-κB related gene mutationOcular adnexal lymphomaTNFAIP3 (A20) deletion

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