Detection of 3q27 chromosomal abnormality in diffuse large B cell lymphoma using FISH on cell microarray / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 73-77, 2008.
Article
in Chinese
| WPRIM
| ID: wpr-229816
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the association of 3q27 chromosome rearrangement with bcl-6 gene amplification and the molecular classification, therapeutic efficacies, and clinical stages in diffuse large B cell lymphoma (DLBC).</p><p><b>METHODS</b>The newly invented cell microarray was used to detect 3q27 chromosome rearrangement and bcl-6 gene amplification in 60 cases of DLBCL by fluorescence in situ hybridization (FISH). The molecular classification of germinal center B-cell-like (GCB) and non-germinal center B-cell-like (non-GCB) was investigated by analyzing the expression of CD20, CD10, bcl-6 and MUM1 simultaneously by immunohistochemical S-P method and tissue microarray. The information of therapeutic efficacies and clinical stages was obtained by analyzing clinical cases. The relationships among the factors were analyzed by statistics.</p><p><b>RESULTS</b>In 60 cases of DLBCL, 48.3%(29/60) were GCB and 51.7%(31/60) were non-GCB. The 3q27 chromosome rearrangement and bcl-6 gene amplification were present in 15 and 22 cases respectively. In 15 cases with 3q27 rearrangement, bcl-6 protein expression was positive in 3(20.0%), which was significantly different from that in cases without 3q27 rearrangement (P=0.017). In 60 cases of DLBCL, bcl-6 gene amplification was present in 22 cases, in which 5(22.7%) were GCB and 17(77.3%) were non-GCB, which was significantly different from that in cases without bcl-6 gene amplification (P=0.003). In 36 cases undergoing the normal CHOP program treatment, bcl-6 gene amplification was present in 15 cases and the rates of the complete remission, partial remission and no change were 4(26.7%), 4(26.7%) and 7(46.7%) respectively, and again it was significantly different from that in cases without bcl-6 gene amplification (P=0.016). There were no statistical significances among bcl-6 gene, BCL-6 protein expression, and clinical stages. Cases with BCL-6 protein positive and negative expression were not correlated with therapeutic efficacies and clinical stages.</p><p><b>CONCLUSION</b>There is lower expression of BCL-6 protein in cases with bcl-6 gene fragmentation. Cases with bcl-6 gene amplification are non-GCB with worse therapeutic results and later clinical stages. There may be other genes near chromosome 3q27 associated with DLBCL prognosis.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Therapeutics
/
Chromosomes, Human, Pair 3
/
B-Lymphocytes
/
Gene Expression Regulation, Neoplastic
/
Gene Amplification
/
Chromosome Aberrations
/
Lymphoma, Large B-Cell, Diffuse
/
Treatment Outcome
/
In Situ Hybridization, Fluorescence
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2008
Type:
Article
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