Analysis of the immunoglobulin heavy chain gene variable region of CD5-positive and -negative diffuse large B cell lymphoma.
Leukemia
; 15(3): 452-7, 2001 Mar.
Article
em En
| MEDLINE
| ID: mdl-11237070
ABSTRACT
We analyzed nucleotide sequence and intraclonal diversity of the rearranged immunoglobulin heavy chain gene variable region (VH gene) of CD5+ and CD5- diffuse large B cell lymphoma (DLBCL) to clarify the cell origin of de novo CD5+ DLBCL. Ten cases of CD5+ DLBCL and 29 cases of CD5- DLBCL were analyzed. The frequencies of somatic mutation were 0.7 to 12.9% (average, 6.2%) in CD5+ DLBCL and 2.0 to 25.9% (average, 11.1%) in CD5- DLBCL. The ongoing mutation rate was estimated from the number of further single base-substitutions, expressed as a percentage of the total number of nucleotides in 10 cloned PCR products for each case (%). The averages of the ongoing mutation rate of CD5+ DLBCL (four cases) and CD5 DLBCL (seven cases) were 0.051% and 0.197%, respectively. The rate of CD5+ DLBCL was significantly lower than that of CD5- DLBCL (t-test, P = 0.024). These data may indicate that the cell origin of CD5+ DLBCL is different from that of CD5- DLBCL. CD5 is not an activated antigen in DLBCL, but a specific marker of the B1 subset of the B cells, and de novo CD5+ DLBCL may therefore be derived from this unique subset.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Região Variável de Imunoglobulina
/
Linfoma de Células B
/
Linfoma Difuso de Grandes Células B
/
Cadeias Pesadas de Imunoglobulinas
/
Antígenos CD5
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Leukemia
Assunto da revista:
HEMATOLOGIA
/
NEOPLASIAS
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Japão