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98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia
Immunoglobulin heavy chain variable region (IGHV) mutational status has been an important prognostic factor for chronic lymphocytic leukemia (CLL) for decades. Patients with unmutated IGHV (≥98% identity to the germline sequence) have inferior prognosis and tend to carry unfavorable genetic markers...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6997101/ https://www.ncbi.nlm.nih.gov/pubmed/31849198 http://dx.doi.org/10.1002/cam4.2788 |
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author | Shi, Ke Sun, Qian Qiao, Chun Zhu, Huayuan Wang, Li Wu, Jiazhu Wang, Lili Fu, Jianxin Young, Ken H. Fan, Lei Xia, Yi Xu, Wei Li, Jianyong |
author_facet | Shi, Ke Sun, Qian Qiao, Chun Zhu, Huayuan Wang, Li Wu, Jiazhu Wang, Lili Fu, Jianxin Young, Ken H. Fan, Lei Xia, Yi Xu, Wei Li, Jianyong |
author_sort | Shi, Ke |
collection | PubMed |
description | Immunoglobulin heavy chain variable region (IGHV) mutational status has been an important prognostic factor for chronic lymphocytic leukemia (CLL) for decades. Patients with unmutated IGHV (≥98% identity to the germline sequence) have inferior prognosis and tend to carry unfavorable genetic markers compared to those with mutated IGHV (<98% identity to the germline sequence). However, 98% as the cutoff for IGHV mutational status is a mathematical choice and remains controversial. We have previously reported distinct IGHV repertoire features between Chinese and western CLL populations. Here, we retrospectively studied 595 Chinese CLL patients to determine the best cutoff value for IGHV in Chinese CLL population. Using 1% as the interval for IGHV identity, we divided the studied cohort into seven subgroups from 95% to 100%. Briefer time to first treatment (TTFT) and overall survival (OS) were observed in cases with ≥98% compared to those with <98%, while the differences were obscure within subgroups ≥98% (98%‐98.99%, 99%‐99.99%, and 100%) and <98% (<94.99%, 95%‐95.99%, 96%‐96.99%, and 97%‐97.99%). Multivariate analysis confirmed the independent prognostic value of 98% being the cutoff for IGHV identity in terms of both TTFT and OS. All the prognostic factors, including del(17p13), del(11q22.3), TP53 mutation, MYD88 mutation, NOTCH1 mutation, SF3B1 mutation, CD38, ZAP‐70, Binet staging, gender, and β2‐microglobulin, were significantly different in distribution between group <98% and group ≥98%, but not among subgroups 98%‐98.99%, 99%‐99.99%, and 100%. In conclusion, 98% is the optimal cutoff of IGHV identity for the prognosis evaluation of Chinese CLL patients. |
format | Online Article Text |
id | pubmed-6997101 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-69971012020-02-05 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia Shi, Ke Sun, Qian Qiao, Chun Zhu, Huayuan Wang, Li Wu, Jiazhu Wang, Lili Fu, Jianxin Young, Ken H. Fan, Lei Xia, Yi Xu, Wei Li, Jianyong Cancer Med Clinical Cancer Research Immunoglobulin heavy chain variable region (IGHV) mutational status has been an important prognostic factor for chronic lymphocytic leukemia (CLL) for decades. Patients with unmutated IGHV (≥98% identity to the germline sequence) have inferior prognosis and tend to carry unfavorable genetic markers compared to those with mutated IGHV (<98% identity to the germline sequence). However, 98% as the cutoff for IGHV mutational status is a mathematical choice and remains controversial. We have previously reported distinct IGHV repertoire features between Chinese and western CLL populations. Here, we retrospectively studied 595 Chinese CLL patients to determine the best cutoff value for IGHV in Chinese CLL population. Using 1% as the interval for IGHV identity, we divided the studied cohort into seven subgroups from 95% to 100%. Briefer time to first treatment (TTFT) and overall survival (OS) were observed in cases with ≥98% compared to those with <98%, while the differences were obscure within subgroups ≥98% (98%‐98.99%, 99%‐99.99%, and 100%) and <98% (<94.99%, 95%‐95.99%, 96%‐96.99%, and 97%‐97.99%). Multivariate analysis confirmed the independent prognostic value of 98% being the cutoff for IGHV identity in terms of both TTFT and OS. All the prognostic factors, including del(17p13), del(11q22.3), TP53 mutation, MYD88 mutation, NOTCH1 mutation, SF3B1 mutation, CD38, ZAP‐70, Binet staging, gender, and β2‐microglobulin, were significantly different in distribution between group <98% and group ≥98%, but not among subgroups 98%‐98.99%, 99%‐99.99%, and 100%. In conclusion, 98% is the optimal cutoff of IGHV identity for the prognosis evaluation of Chinese CLL patients. John Wiley and Sons Inc. 2019-12-17 /pmc/articles/PMC6997101/ /pubmed/31849198 http://dx.doi.org/10.1002/cam4.2788 Text en © 2019 The Authors. Cancer Medicine published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Clinical Cancer Research Shi, Ke Sun, Qian Qiao, Chun Zhu, Huayuan Wang, Li Wu, Jiazhu Wang, Lili Fu, Jianxin Young, Ken H. Fan, Lei Xia, Yi Xu, Wei Li, Jianyong 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia |
title | 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia |
title_full | 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia |
title_fullStr | 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia |
title_full_unstemmed | 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia |
title_short | 98% IGHV gene identity is the optimal cutoff to dichotomize the prognosis of Chinese patients with chronic lymphocytic leukemia |
title_sort | 98% ighv gene identity is the optimal cutoff to dichotomize the prognosis of chinese patients with chronic lymphocytic leukemia |
topic | Clinical Cancer Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6997101/ https://www.ncbi.nlm.nih.gov/pubmed/31849198 http://dx.doi.org/10.1002/cam4.2788 |
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