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08:31
Murine Model of Leukemia Relapse to Induction Chemotherapy for Acute Lymphoblastic Leukemia
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PAX5-driven subtypes of B-progenitor acute lymphoblastic leukemia
Zhaohui Gu1, Michelle L Churchman1, Kathryn G Roberts1
1Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA.
Nature Genetics
|January 16, 2019
Summary
This study revises B-acute lymphoblastic leukemia (B-ALL) classification by identifying 23 subtypes using genomic analysis. It highlights the critical role of PAX5 gene alterations in B-ALL development and progression.
Area of Science:
- Genomics
- Hematology
- Molecular Biology
Background:
- Chromosomal rearrangements define B-progenitor acute lymphoblastic leukemia (B-ALL) subtypes.
- Many B-ALL cases lack identified initiating genetic alterations.
Purpose of the Study:
- To create a revised taxonomy of B-ALL using integrated genomic analysis.
- To investigate the role of PAX5 gene alterations in B-ALL pathogenesis.
Main Methods:
- Integrated genomic analysis of 1,988 childhood and adult B-ALL cases.
- Transcriptome sequencing for B-ALL classification.
- In vivo studies to assess the impact of PAX5 alterations.
Main Results:
- A revised taxonomy of 23 B-ALL subtypes was established.
- Two novel subtypes with frequent PAX5 alterations were identified.
- PAX5 p.Pro80Arg mutation impairs B lymphoid development and promotes B-ALL with biallelic Pax5 alteration.
Conclusions:
- Transcriptome sequencing is effective for classifying B-ALL.
- PAX5 is a crucial checkpoint in B lymphoid maturation and leukemogenesis.
- Genomic alterations, particularly in PAX5, are central to B-ALL subtypes.
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