The Light Chain IgLV3-21 Defines a New Poor Prognostic Subgroup in Chronic Lymphocytic Leukemia: Results of a Multicenter Study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F18%3A00106953" target="_blank" >RIV/00216224:14740/18:00106953 - isvavai.cz</a>

Alternative codes found

RIV/65269705:_____/18:00069035

Result on the web

<a href="http://dx.doi.org/10.1158/1078-0432.CCR-18-0133" target="_blank" >http://dx.doi.org/10.1158/1078-0432.CCR-18-0133</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1158/1078-0432.CCR-18-0133" target="_blank" >10.1158/1078-0432.CCR-18-0133</a>

Result language

angličtina

Original language name

The Light Chain IgLV3-21 Defines a New Poor Prognostic Subgroup in Chronic Lymphocytic Leukemia: Results of a Multicenter Study

Original language description

Purpose: Unmutated (UM) immunoglobulin heavy chain variable region (IgHV) status or IgHV3-21 gene usage is associated with poor prognosis in chronic lymphocytic leukemia (CLL) patients. Interestingly, IgHV3-21 is often coexpressed with light chain IgLV3-21, which is potentially able to trigger cell-autonomous BCR-mediated signaling. However, this light chain has never been characterized independently of the heavy chain IgHV3-21. Experimental Design: We performed total RNA sequencing in 32 patients and investigated IgLV3-21 prognostic impact in terms of treatment-free survival (TFS) and overall survival (OS) in 3 other independent cohorts for a total of 813 patients. IgLV3-21 presence was tested by real-time PCR and confirmed by Sanger sequencing. Results: Using total RNA sequencing to characterize 32 patients with high-risk CLL, we found a high frequency (28%) of IgLV3-21 rearrangements. Gene set enrichment analysis revealed that these patients express higher levels of genes responsible for ribosome biogenesis and translation initiation (P &lt; 0.0001) as well as MYC target genes (P = 0.0003). Patients with IgLV3-21 rearrangements displayed a significantly shorter TFS and OS (P &lt; 0.05), particularly those with IgHV mutation. In each of the three independent validation cohorts, we showed that IgLV3-21 rearrangements-similar to UM IgHV status-conferred poor prognosis compared with mutated IgHV (P &lt; 0.0001). Importantly, we confirmed by multivariate analysis that this was independent of IgHV mutational status or subset # 2 stereotyped receptor (P &lt; 0.0001). Conclusions: We have demonstrated for the first time that a light chain can affect CLL prognosis and that IgLV321 light chain usage defines a new subgroup of CLL patients with poor prognosis. (C) 2018 AACR.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30204 - Oncology

Project

<a href="/en/project/NV16-29622A" target="_blank" >NV16-29622A: THE IMPACT OF THERAPEUTIC TARGETING OF BCR SIGNALLING ON GENE EXPRESSION IN B CELL MALIGNANCIES AND ITS PROGNOSTIC AND PREDICTIVE SIGNIFICANCE</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Clinical cancer research

ISSN

1078-0432

e-ISSN

—

Volume of the periodical

24

Issue of the periodical within the volume

20

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

5048-5057

UT code for WoS article

000447598900016

EID of the result in the Scopus database

2-s2.0-85054961826