PLL-SIP
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA445580 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR6893881.fastq.gz | Fastqsanger.gz | |||
| SRR6893882.fastq.gz | Fastqsanger.gz | |||
| SRR6893883.fastq.gz | Fastqsanger.gz |
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Project description:T cell prolymphocytic leukemia (T-PLL) is mostly characterized by aberrant expansion of small to medium sized pro-lymphocytes with a mature post-thymic phenotype, high aggressiveness of the disease and poor prognosis. However, T-PLL is more heterogeneous with a wide-range of clinical, morphological, and molecular features, which occasionally impedes the diagnosis. We hypothesized that T-PLL consists of phenotypic and genotypic subgroups that may explain the heterogeneity of the disease. We found that T-PLL does not show a clear skewing in T cell receptor alpha (TRA), TRB gene usage and CDR3 stereotypy. In addition, multi-dimensional immuno-phenotyping and gene expression profiling did not reveal clear T-PLL subgroups. However, based on miRNA expression profiles, T-PLL samples did clearly cluster in subgroups. We identified 35 miRNAs that were aberrantly expressed in T-PLL with miR-200c/141 as the most differentially expressed cluster. High miR-200c/141 expression was significantly correlated with increased white blood cell counts and poor survival. Furthermore, we found that overexpression of miR-200c/141 in T-PLL correlated with downregulation of their targets ZEB2 and TGFβR3, indicating that the TGFβ pathway is affected. Our results thus highlight the emerging role for aberrantly expressed oncogenic miRNAs in T-PLL, thereby paving the way for new therapeutic targets in this disease.
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Project description:T cell prolymphocytic leukemia (T-PLL) is mostly characterized by aberrant expansion of small to medium sized pro-lymphocytes with a mature post-thymic phenotype, high aggressiveness of the disease and poor prognosis. However, T-PLL is more heterogeneous with a wide-range of clinical, morphological, and molecular features, which occasionally impedes the diagnosis. We hypothesized that T-PLL consists of phenotypic and genotypic subgroups that may explain the heterogeneity of the disease. We found that T-PLL does not show a clear skewing in T cell receptor alpha (TRA), TRB gene usage and CDR3 stereotypy. In addition, multi-dimensional immuno-phenotyping and gene expression profiling did not reveal clear T-PLL subgroups. However, based on miRNA expression profiles, T-PLL samples did clearly cluster in subgroups. We identified 35 miRNAs that were aberrantly expressed in T-PLL with miR-200c/141 as the most differentially expressed cluster. High miR-200c/141 expression was significantly correlated with increased white blood cell counts and poor survival. Furthermore, we found that overexpression of miR-200c/141 in T-PLL correlated with downregulation of their targets ZEB2 and TGFβR3, indicating that the TGFβ pathway is affected. Our results thus highlight the emerging role for aberrantly expressed oncogenic miRNAs in T-PLL, thereby paving the way for new therapeutic targets in this disease.
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Project description:Gene expression analysis to search for genes which are up- and down-regulated after CacyBP/SIP overexpression in HCT116 cells
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