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TranscriptomicsT cell help controls the speed of the cell cycle in germinal center B cells.
The germinal center (GC) is a microanatomical compartment wherein high-affinity antibody-producing B cells are selectively expanded. B cells proliferate and mutate their antibody genes in the dark zone (DZ) of the GC and are then selected by T cells in the light zone (LZ) on the basis of affinity. H...
ORGANISM(S): Mus musculus 
2015-08-12 | E-GEOD-71295 | biostudies-arrayexpress
GenomicsRif1 Prevents Resection of DNA Breaks and Promotes Immunoglobulin Class Switching
DNA double-strand breaks (DSBs) represent a threat to the genome because they can lead to loss of genetic information and chromosome rearrangements. The DNA repair protein p53 binding protein 1 (53BP1) protects the genome by limiting nucleolytic processing of DSBs by a mechanism that requires its ph...
ORGANISM(S): Mus musculus 
2013-03-01 | E-GEOD-42298 | biostudies-arrayexpress
GenomicsPTIP promotes chromatin changes critical for immunoglobulin class switch recombination
Programmed genetic rearrangements in lymphocytes require transcription at antigen receptor genes to promote accessibility for initiating double-strand break (DSB) formation critical for DNA recombination and repair. Here we show that activated B cells deficient in the PTIP component of the MLL3 (mix...
ORGANISM(S): Mus musculus 
2010-08-25 | E-GEOD-20852 | biostudies-arrayexpress
TranscriptomicsA mouse model of endemic Burkitt translocations reveals the long-range boundaries of Ig-mediated oncogene deregulation
Igh/Myc translocations underlie both sporadic Burkitt lymphoma (BL) and the endemic clinical form affecting African children infected with malaria. However, while sporadic translocations decapitate Myc from 5' proximal regulatory elements, most endemic events occur hundreds of kilobases away from My...
ORGANISM(S): Mus musculus 
2013-07-04 | E-GEOD-48514 | biostudies-arrayexpress
TranscriptomicsEpigenetic targeting of activation-induced cytidine deaminase
Precisely how AID is recruited to these off-target sites is not entirely understood. To gain further insight into how AID selects its targets we compared AID-mediated translocations in two different cell types, B cells and mouse embryonic fibroblasts (MEFs). AID targets a distinct set of hotspots in...
ORGANISM(S): Mus musculus 
2015-01-30 | E-GEOD-61523 | biostudies-arrayexpress
GenomicsGenome wide localization of Activation induced cytidine deaminase (AID), Spt5, and RNA Polymerase II (PolII) in mouse
Activation induced cytidine deaminase (AID) initiates antibody gene diversification by creating U:G mismatches. However, AID is not specific for antibody genes. Off-target lesions can activate oncogenes or cause chromosome translocations. Despite its importance in these key transactions little is kn...
ORGANISM(S): Mus musculus 
2010-10-05 | E-GEOD-24178 | biostudies-arrayexpress
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