Hepatocellular carcinoma (HCC) is a deadly disease, often unnoticed till the late stages, where treatment options become limited. Thus, there is a critical need to identify early biomarkers for detection of the developing HCC, as well as molecular pathways that would be amenable to therapeutic intervention. While efforts using human serum and tissues from late stage patients have been undertaken, progress has been limited. We have therefore explored the possibility of utilizing established mouse models for the discovery of biomarkers, as well as to understand in a systematic manner the molecular pathways that are progressively deregulated by the various etiological factors in contributing to HCC formation. As an initial effort, we have used the Hepatitis B surface antigen (HBsAg) transgenic mice as a hepatitis model, which have been exposed to aflatoxin B1 (AFB1). In this report, we present the initial findings from a extensive longitudinal study, which confirms the synergistic effect of both these etiological factors, with a gender bias towards male mice. Tumors from the mouse models were validated both histologically as well as by molecular transcriptome analysis by comparison with human HCCs. In addition, using these models, we have identified carnitine as a novel biomarker for HCC development, which was again validated using human HCC samples. Conclusion: This study therefore highlights the utility of these mouse models in identifying biomarkers for detection of human HCCs, as well as for the systematic analysis of molecular pathways that are affected by various etiological agents during the progression of HCC from an untransformed hepatocyte, which could provide novel options for targeted therapy.
Molecular characterization of hepatocarcinogenesis using mouse models.
Specimen part
View SamplesTo test the effects of narciclasine treatment on major metabolic organs of C57BL/6 mice, we first fed the mice with a high fat diet (HFD) then gavaged them with the narciclasine weekly. After 7 weeks of narciclasine treatment, the four major metabolic organs WAT, BAT, Liver and muscle were harvested and the total RNA was prepared for RNA sequencing analysis. By analyzing the RNA-seq data sets, we found that the primary target of this narciclasine is skeletal muscle. Overall design: Examinaton of expression profile upon narciclasine trearment on different tissues
Narciclasine attenuates diet-induced obesity by promoting oxidative metabolism in skeletal muscle.
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View SamplesBackground: Vitamin D deficiency is associated with cardiac hypertrophy and heart failure, and vitamin D therapy prevents the progression of cardiac hypertrophy in animal models. Here, we examine whether vitamin D therapy regresses pre-existing cardiac hypertrophy, and prevents the progression to heart failure.
Preventing progression of cardiac hypertrophy and development of heart failure by paricalcitol therapy in rats.
Sex, Age, Specimen part, Treatment
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Simultaneous analysis of miRNA-mRNA in human meningiomas by integrating transcriptome: A relationship between PTX3 and miR-29c.
Sex, Age, Specimen part
View SamplesAlthough meningioma is a common disease, there is a lack of understanding of the underlying molecular mechanisms behind its initiation and progression. We used combined miRNA-mRNA transcriptome analysis to discover novel genes and networks in meningiomas.
Simultaneous analysis of miRNA-mRNA in human meningiomas by integrating transcriptome: A relationship between PTX3 and miR-29c.
Sex, Age, Specimen part
View SamplesLeukemia Inhibitory Factor is an important cytokine of the IL family. Recent findings suggest it has a crucial role in cancer progression
Leukemia Inhibitory Factor Promotes Aggressiveness of Chordoma.
Cell line
View SamplesWe found that the core spliceosomal proteins RBM17, U2SURP and CHERP form a protein complex regulating alternative splicing and expression of a whole network of RNA binding proteins Overall design: RNA sequencing of triplicate RNA samples from HEK293 cells treated with siRNAs against RBM17, U2SURP , CHERP or SCRAMBLE sequence
RBM17 Interacts with U2SURP and CHERP to Regulate Expression and Splicing of RNA-Processing Proteins.
Cell line, Subject
View SamplesWe generated three mRNA expression profiles by RNA-Seq of (i) wild-type crypts, (ii) Atoh1 knockout crypts, and (iii) purified ATOH1-positive cells. Overall design: We isolated Atoh1 knockout and littermate wild-type crypts from 6-8 week old Atoh1lox/lox;VilCreERT2 and Atoh1lox/WT;VilCreERT2 mice, respectively. In addition, ATOH1-positive cells were isolated by flow cytometry of 7AAD-negative (live), GFP-positive cells from either ileal or colonic crypts of Atoh1GFP/GFp mice (which express a functional ATOH1::GFP protein and are phenotypically normal).
Transcriptional Regulation by ATOH1 and its Target SPDEF in the Intestine.
Specimen part, Subject
View SamplesTranslating ribosome affinity purification technology was used to isolate mRNAs from cerebellar Purkinje neurons from control (Pcp2-BacTrap; Rbm17 f/+) and mutant (Pcp2-BacTRAP; Pcp2-Cre; Rbm17 f/-) mice. Overall design: RNA isolation was performed when animals were four-weeks-old (n=3 animals per genotype). Using NuGEN Ovation RNA-Seq System v2, purified double-stranded cDNA was generated from 10 ng of total RNA and amplified using both 3' poly (A) selection and random priming. 2 µg of each sample was sheared using the Covaris S2 focused-ultrasonicator following the manufacturer's protocol to obtain a final library with insert size of 400 bp. The sheared samples were quantified using the NanoDrop ND-1000 spectrophotometer and Invitrogen Qubit 2.0 DNA quantitation assay. The fragment sizes were confirmed on the Agilent Bioanalyzer to verify proper shearing. A double-stranded DNA library was produced using Illumina TruSeq DNA library preparation system and the sequencing was run on a HiSeq 2500 system.
Extensive cryptic splicing upon loss of RBM17 and TDP43 in neurodegeneration models.
Specimen part, Cell line, Subject
View SamplesCTSK-mGFP positive cells from Day 6 old mouse femurs were sorted as single cells into 384 well plates pre-loaded with unique barcoded RT-primers. After sorting, cells were snap frozen on dry ice before being submitted to the New York Genome Center (NYGC) for cDNA synthesis and library preparation. The FACS profile for all the sored cells were collected to co-relate with gene expression. Overall design: Mouse femur was obtained from mice within the same litter. Femur samples was subjected to collagenase digestion, and single cell suspension was obtained. The samples were stained for FACS antibodies and single cell sorting was performed into two individual 384 well plates. The experiment has two replicates from two independant animals. The samples were always kept discrete.
Discovery of a periosteal stem cell mediating intramembranous bone formation.
Specimen part, Cell line, Subject
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