A dual function for the chromatin organizer Special A-T rich Binding Protein 1 in B-lineage cells.
Cell Mol Immunol
; 20(10): 1114-1126, 2023 10.
Article
em En
| MEDLINE
| ID: mdl-37544964
ABSTRACT
SATB1 (Special A-T rich Binding protein 1) is a cell type-specific factor that regulates the genetic network in developing T cells and neurons. In T cells, SATB1 is required for lineage commitment, VDJ recombination, development and maturation. Considering that its expression varies during B-cell differentiation, the involvement of SATB1 needs to be clarified in this lineage. Using a KO mouse model in which SATB1 was deleted from the pro-B-cell stage, we examined the consequences of SATB1 deletion in naive and activated B-cell subsets. Our model indicates first, unlike its essential function in T cells, that SATB1 is dispensable for B-cell development and the establishment of a broad IgH repertoire. Second, we show that SATB1 exhibits an ambivalent function in mature B cells, acting sequentially as a positive and negative regulator of Ig gene transcription in naive and activated cells, respectively. Third, our study indicates that the negative regulatory function of SATB1 in B cells extends to the germinal center response, in which this factor limits somatic hypermutation of Ig genes.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Ligação à Região de Interação com a Matriz
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article