HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS REGISTER		Author Keyword(s) Vol Page [Advanced]

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this link to a friend Similar articles in this journal Similar articles in PubMed Add article to my folders Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Mottok, A Articles by Bräuninger, A Search for Related Content PubMed PubMed Citation Articles by Mottok, A Articles by Bräuninger, A Pubmed/NCBI databases Medline Plus Health Information Hodgkin's Disease

Activation induced cytidine deaminase expression in lymphocyte predominant Hodgkin lymphoma

Department of Pathology, University of Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany

Correspondence to:
Dr A Bräuninger
Department of Pathology, University of Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany; braeuninger{at}em.uni-frankfurt.de
ABSTRACT
Background: The lymphocytic and histiocytic (L&H) cells of lymphocyte predominant Hodgkin lymphoma (HL) originate from germinal centre B cells and carry mutated V gene rearrangements, usually with intraclonal diversity. It is unclear whether intraclonal V gene diversification by somatic hypermutation, which is strictly dependent on the enzyme activation induced cytidine deaminase (AID), is restricted to the early phase of lymphoma clone expansion and later silenced, or whether it remains active throughout malignant proliferation.

Aims: To analyse whether AID is expressed in L&H cells as an indicator of active somatic hypermutation in the tumour cells.

Methods: L&H cells from lymphocyte predominant HL cases and centroblasts from lymphadenites were micromanipulated and analysed for AID expression by quantitative real time polymerase chain reaction.

Results: The AID transcription level was higher than background in three of the six lymphocyte predominant HL cases, although it was lower than that seen in centroblasts.

Conclusions: Somatic hypermutation may remain active in L&H cells in a considerable proportion of cases, increasing the risk of acquiring further transforming mutations.

Abbreviations: AID, activation induced cytidine deaminase; Ct, threshold cycle; GC, germinal centre; HL, Hodgkin lymphoma; L&H, lymphocytic and histiocytic; PCR, polymerase chain reaction; RT, reverse transcription

Keywords: lymphocyte predominant Hodgkin lymphoma; activation induced cytidine deaminase; somatic hypermutation; intraclonal diversity; quantitative real time polymerase chain reaction

This article has been cited by other articles:

				S. W. Popov, G. Moldenhauer, B. Wotschke, S. Bruderlein, T. F. Barth, K. Dorsch, O. Ritz, P. Moller, and F. Leithauser Target Sequence Accessibility Limits Activation-Induced Cytidine Deaminase Activity in Primary Mediastinal B-Cell Lymphoma Cancer Res., July 15, 2007; 67(14): 6555 - 6564. [Abstract] [Full Text] [PDF]