Abstract:
:Hodgkin- and Reed-Sternberg (HRS) cells microdissected from 41 classical Hodgkin lymphomas (cHL) of 40 patients comprising 8 lymphocyte-rich (cHL-LR), 16 nodular sclerosis (cHL-NS), 15 mixed-cellularity (cHL-MC), and 2 lymphocyte-depletion (cHL-LD) subtypes were analyzed by comparative genomic hybridization for recurrently imbalanced chromosomal subregions. Chromosomal gains most frequently involved chromosome 2p (54%), 12q (37%), 17p (27%), 9p and 16p (24% each), and 17q and 20q (20% each), whereas losses primarily affected chromosome 13q (22%). Using fluorescence in situ hybridization, amplification of the REL oncogene was demonstrated within a distinct 2p15-p16 amplicon. The high frequency of 2p overrepresentations including REL, particularly in cHL-NS (88%), suggests that an alternative mechanism of constitutive activation of nuclear factor NF-kappaB is a hallmark of HRS cells. Hierarchical cluster analysis of chromosomal imbalances revealed a closer relationship among cHL-NS than other subtypes. Furthermore, there is a tendency for different subtypes of cHL-MC tumors characterized by different ages at the time of tumor onset and gain of chromosome 17p. The imbalance pattern of cHL subtypes suggests that different molecular pathways are activated, with REL or other genes on chromosomal band 2p15-p16 playing a fundamental role in the pathogenesis of classical Hodgkin lymphoma.
journal_name
Bloodjournal_title
Bloodauthors
Joos S,Menz CK,Wrobel G,Siebert R,Gesk S,Ohl S,Mechtersheimer G,Trümper L,Möller P,Lichter P,Barth TFdoi
10.1182/blood.v99.4.1381subject
Has Abstractpub_date
2002-02-15 00:00:00pages
1381-7issue
4eissn
0006-4971issn
1528-0020journal_volume
99pub_type
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