Project description:The binding of Deleted in Azoospermia Associated Protein 1 (DAZAP1) to splicing mutations in the BRCA1 and NF1 genes that caused exon exclusion suggest a role for DAZAP1 in RNA splicing. To elucidate the biological functions of DAZAP1 and to search for its natural RNA substrates, we compared the exon usages of wild-type and Dazap1 mutant testes by exon microarrays. We used wild-type and Dazap1 mutant mouse testes. Each genotype has three replicates. 6 total samples were analyzed.
Project description:Deleted in Azoospermia Associated Protein 1 (DAZAP1) is a ubiquitous RNA-binding protein that is highly expressed in the testis. It is a component of the hnRNP particles and shuttles between the nucleus and the cytoplasm. Mice expressing the DAZAP1-Fn mutant protein manifest both growth retardation and spermatogenic arrest before meiosis I. To elucidate the biological function(s) of DAZAP1 and to search for its natural RNA substrates, we compared the expression profiles of wild-type and Dazap1 mutant testes by cDNA microarrays. We used wild-type and Dazap1 mutant mouse testes. Each genotype has three replicates. 6 total samples were analyzed.
Project description:The binding of Deleted in Azoospermia Associated Protein 1 (DAZAP1) to splicing mutations in the BRCA1 and NF1 genes that caused exon exclusion suggest a role for DAZAP1 in RNA splicing. To elucidate the biological functions of DAZAP1 and to search for its natural RNA substrates, we compared the exon usages of wild-type and Dazap1 mutant testes by exon microarrays.
Project description:Deleted in Azoospermia Associated Protein 1 (DAZAP1) is a ubiquitous RNA-binding protein that is highly expressed in the testis. It is a component of the hnRNP particles and shuttles between the nucleus and the cytoplasm. Mice expressing the DAZAP1-Fn mutant protein manifest both growth retardation and spermatogenic arrest before meiosis I. To elucidate the biological function(s) of DAZAP1 and to search for its natural RNA substrates, we compared the expression profiles of wild-type and Dazap1 mutant testes by cDNA microarrays.
Project description:<p>Although multi-agent combination chemotherapy is curative in a significant fraction of childhood acute lymphoblastic leukemia (ALL) patients, 20% of cases relapse and most die due to chemo-refractory disease. Here we used whole-exome and whole-genome sequencing to analyze the mutational landscape and pattern of clonal evolution at relapse in pediatric ALL cases. These analyses showed that ALL relapses originate from a common ancestral precursor clone of the diagnosis and relapsed populations and frequently harbor mutations implicated in chemotherapy resistance. RAS-MAPK pathway activating mutations in NRAS, KRAS and PTPN11 were present in 24/55 (44%) cases in our series. Notably, while some cases showed emergence of RAS mutant clones at relapse, in others, RAS mutant clones present at diagnosis were replaced by RAS wild type populations. Mechanistically, functional dissection of mouse and human wild type Kras and mutant Kras (Kras G12D) isogenic leukemia cells demonstrated induction of methotrexate resistance, but also improved response to vincristine, in mutant Kras- expressing lymphoblasts. These results identify chemotherapy driven selection as a central mechanism of leukemia clonal evolution and pave the road for the development of tailored personalized therapies for the treatment of relapsed ALL. </p>
Project description:This study aims to explore the transcriptomic changes in Nkapl-KO, Sox30-KO and Nkapl TGdel/TGdel mouse testes comparing with their wild-type testes. Fresh testes were collected from 21d wild-type, Nkapl-KO, Sox30-KO and Nkapl TGdel/TGdel mice, respectively.