Changes in apoptosis-related pathways in acute myelocytic leukemia
| Autor: | Jorge Sierra, Sakari Knuutila, Sı́lvia Casas, Mauno Vihinen, Juha Ollila, Anna Aventin |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Adult
Male Cancer Research Cell signaling Tumor suppressor gene Apoptosis Receptor IGF Type 1 03 medical and health sciences 0302 clinical medicine Downregulation and upregulation Genetics Humans Cell Lineage Molecular Biology Caspase Oligonucleotide Array Sequence Analysis 030304 developmental biology 0303 health sciences biology Tumor Necrosis Factor-alpha Cell growth Infant Middle Aged Cell cycle Glutathione Leukemia Myeloid Acute Caspases 030220 oncology & carcinogenesis Cancer research biology.protein Female Tumor Suppressor Protein p53 Signal transduction Signal Transduction |
| Zdroj: | Cancer Genetics and Cytogenetics. 146:89-101 |
| ISSN: | 0165-4608 |
| Popis: | Expression analysis of apoptotic genes was performed for 15 patients with acute myelocytic leukemia (AML) at the time of diagnosis to identify genes and signaling pathways involved in the regulation of cell survival and apoptosis during leukemogenesis. cDNA array analysis revealed 34 genes whose expression was significantly different compared to others. Tumor suppressor genes TP53 and CDKN2A were downregulated and protooncogenes JUN and GRB10 were upregulated. Furthermore, several cellular signaling pathways acting either in cell cycle regulation or in apoptosis were altered. Deregulation was found in pathways that contribute to genomic stability (by downregulation of either TP53 or CSE1L and by upregulation of GADD45A) and regulate cell cycle progression (by downregulation of CDKN2A and upregulation of RBBP4, CDC37, and NEDD5). Alterations at the transcriptional level were identified, namely, upregulation of JUN and E2F5. Abnormalities were observed in the regulation of the caspases through upregulation of CASP8 and by altered expression of BCL2-related pathway. Extrinsic apoptotic signals mediated by IGFs were deregulated and the glutathione detoxification pathway was downregulated. These findings provide insight into the regulation of balance between apoptosis and cell proliferation signals, and suggest that these genes and pathways may have an important role in the pathogenesis of AML. |
| Databáze: | OpenAIRE |
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