Project description:c-myc-3'RR mice prone to develop Burkitt lymphoma (BL) were crossed with p53+/- mice in order to obtain c-myc-3'RR/p53+/- mice. These mice develop a wider spectrum of lymphoma including BL, mantle cell lymphoma (MCL) and plasma cell lymphoma (PCL). Transcriptoma analysis of these lymphomas is investigated in these arrays.
Project description:Mantle cell lymphoma (MCL) is a B cell malignancy characterized by a monoclonal proliferation of lymphocytes with co-expression of CD5, CD43 but not CD23. We have developed two murine models of MCL-like lymphoma. Breeding Cdk4R24C mice (a knock-in strain that express a Cdk4 protein resistant to inhibition by p16INK4a and other INK4 family members) with c-myc-3’RR transgenic mice (prone to develop aggressive Burkitt lymphoma-like lymphoma) leads in c-myc/Cdk4R24C mice to development of clonal blastoid MCL-like lymphoma. Breeding p53+/- mice with c-myc-3’RR transgenic mice lead to the development of several mature B cell lymphomas including MCL. In this study we compare MCL transcriptomas of c-myc-3'RR/Cdk4R24C mice and c-myc-3'RR/p53+/- mice. B splenocytes from 2 c-myc/Cdk4R24C lymphoma mice and 2 c-myc-3'RR/p53+/- mice were investigated
Project description:c-myc-3'RR mice prone to develop Burkitt lymphoma (BL) were crossed with p53+/- mice in order to obtain c-myc-3'RR/p53+/- mice. These mice develop a wider spectrum of lymphoma including BL, mantle cell lymphoma (MCL) and plasma cell lymphoma (PCL). Transcriptoma analysis of these lymphomas is investigated in these arrays. Four different plasma cell lymphoma (PCL1-4), three different mantle cell lymphoma (MCL1-4) and four different Burkitt lymphoma (BL1-4) were compared.
Project description:Mantle cell lymphoma (MCL) is a B cell malignancy characterized by a monoclonal proliferation of lymphocytes with co-expression of CD5, CD43 but not CD23. We have developed two murine models of MCL-like lymphoma. Breeding Cdk4R24C mice (a knock-in strain that express a Cdk4 protein resistant to inhibition by p16INK4a and other INK4 family members) with c-myc-3’RR transgenic mice (prone to develop aggressive Burkitt lymphoma-like lymphoma) leads in c-myc/Cdk4R24C mice to development of clonal blastoid MCL-like lymphoma. Breeding p53+/- mice with c-myc-3’RR transgenic mice lead to the development of several mature B cell lymphomas including MCL. In this study we compare MCL transcriptomas of c-myc-3'RR/Cdk4R24C mice and c-myc-3'RR/p53+/- mice.
Project description:We created mice, which are deficient for Myc specifically in cardiac myocytes by crossing crossed Myc-floxed mice (Mycfl/fl) and MLC-2VCre/+ mice. Serial analysis of earlier stages of gestation revealed that Myc-deficient mice died prematurely at E13.5-14.5. Morphological analyses of E13.5 Myc-null embryos showed normal ventricular size and structure; however, decreased cardiac myocyte proliferation and increased apoptosis was observed. BrdU incorporation rates were also decreased significantly in Myc-null myocardium. Myc-null mice displayed a 3.67-fold increase in apoptotic cardiomyocytes by TUNEL assay. We examined global gene expression using oligonucleotide microarrays. Numerous genes involved in mitochondrial death pathways were dysregulated including Bnip3L and Birc2. Keywords: wildtype vs Myc-null
Project description:Induction of apoptosis by the tumor suppressor p53 is known to protect from Myc-driven lymphomagenesis. The p53 family member p73 is also a pro-apoptotic protein, which is activated in response to oncogenes like Myc. We therefore investigated whether p73 provides a similar protection from Myc-driven lymphomas as p53. To generate B-cell lymphomas with defined genetic alterations in p53 or p73, we crossed the Eµ-Myc transgenic to mice heterozygous for germ-line deletions in p53 (p53+/) or p73 (p73+/-). Lymphomas which have spontaneously developed in Eµ-Myc transgenic animals with the genotypes p53+/+, p53+/-, p73+/+, p73+/- or p73-/- were isolated when the animals were moribund and further processed for gene expression profiling with 22.5K cDNA microarrays.
Project description:We created mice, which are deficient for Myc specifically in cardiac myocytes by crossing crossed Myc-floxed mice (Mycfl/fl) and MLC-2VCre/+ mice. Serial analysis of earlier stages of gestation revealed that Myc-deficient mice died prematurely at E13.5-14.5. Morphological analyses of E13.5 Myc-null embryos showed normal ventricular size and structure; however, decreased cardiac myocyte proliferation and increased apoptosis was observed. BrdU incorporation rates were also decreased significantly in Myc-null myocardium. Myc-null mice displayed a 3.67-fold increase in apoptotic cardiomyocytes by TUNEL assay. We examined global gene expression using oligonucleotide microarrays. Numerous genes involved in mitochondrial death pathways were dysregulated including Bnip3L and Birc2. Hearts were taken from wide type and Myc-null Mouse embryos at E13.5 under the dissecting scope. Cardiac myocyte RNA was isolated using TRIZOL®Reagent Total RNA (100 ng) was hybridized to the Sentrix® MouseRef-8 Expression BeadChip that contains probes for ~24,000 transcripts. GeneChips were scanned using the Hewlett-Packard GeneArray Scanner G2500A. The data were analyzed with Illumina Inc. BeadStudio version 1.5.0.34 and normalized by rank invariant method.