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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
GenomicsRPA accumulation during class switch recombination represents 5'-3' DNA end resection during the S-G2/M phase of the cell cycle
AID promotes chromosomal translocations by inducing DNA double-strand breaks (DSBs) at immunoglobulin (Ig) genes and oncogenes in G1. RPA is a ssDNA-binding protein that associates with resected DSBs in the S phase and facilitates the assembly of factors involved in homologous repair (HR) such as R...
ORGANISM(S): Mus musculus 
2013-01-02 | E-GEOD-42451 | 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
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
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
TranscriptomicsTherapeutic antiviral T cells noncytopathically clear persistently infected microglia after conversion into antigen-presenting cells
Several viruses can infect the mammalian nervous system and induce neurological dysfunction. Adoptive immunotherapy (AI) is an approach that involves administration of antiviral T cells and has shown promise in clinical studies for the treatment of peripheral virus infections in humans such as cytom...
ORGANISM(S): Mus musculus 
2015-06-22 | E-GEOD-66421 | 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
TranscriptomicsNext Generation Sequencing Analysis of Wild Type and 53BP1-/- Transcriptomes in B lymphocytes
Absence of 53BP1 influences the profile of DNA rearrangements in B lymphocytes.To determine whether the differences in translocation partner choice were due to differences in transcription, we compared the transcriptome of 53BP1 deficient and wild-type B cells by RNA-Seq and Polymerase II chromatin ...
ORGANISM(S): Mus musculus 
2013-02-12 | E-GEOD-42350 | biostudies-arrayexpress
TranscriptomicsTranscription profiling of mouse dendritic subsets in vivo
Dendritic cells (DCs) process and present self and foreign antigens to induce tolerance or immunity. In vitro models suggest that induction of immunity is controlled by regulating the presentation of antigen, but little is known about how DCs control antigen presentation in vivo. To examine antigen ...
ORGANISM(S): Mus musculus 
2008-06-14 | E-GEOD-6259 | biostudies-arrayexpress
TranscriptomicsB cell super-enhancers and regulatory clusters recruit AID tumorigenic activity
The antibody gene mutator AID promiscuously damages oncogenes and B cell identity genes leading to chromosomal translocations and tumorigenesis. Why non-immunoglobulin loci are susceptible to AID activity is unknown. Here we study AID-mediated lesions in the context of nuclear architecture and the B...
ORGANISM(S): Mus musculus 
2014-12-04 | E-GEOD-62063 | biostudies-arrayexpress
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