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Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
Published on: June 15, 2016
The Role of MicroRNAs in Myeloproliferative Neoplasia
Shaban Alizadeh1, Seyed Ghader Azizi1, Masoud Soleimani2
1Hematology Department, School of Allied Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Abstract:
MiRs are 17-25 nucleotide non-coding RNAs. These RNAs target approximately 80% of protein coding mRNAs. MiRs control gene expression and altered expression of them affects the development of cancer. MiRs can function as tumor suppressor via down-regulation of proto-oncogenes and may function as oncogenes by suppressing tumor suppressors. Myeloproliferative neoplasias (formerly known as chronic myeloproliferative disorders) form a class of hematologic malignancies demonstrating the expansion of stem cells in one or more hematopoietic cell lines. CML results from an acquired translocation known as BCR-ABL (Philadelphia chromosome). JAK2V617F mutation is present in over 95% of PV, 55% of ET and 65% of PMF cases. Aberrant expression of miR is associated with myeloproliferative neoplasias, pathogenesis, disease progress and response to treatment. MiRs can also be potential therapeutic targets. CML is mainly treated by tyrosine kinase inhibitors such as Imatinib. In addition, altered function of miRs may be used as a prognostic factor in treatment. Resistance to Imatinib is currently a major clinical problem. The role of a number of miRs has been demonstrated in this resistance. Changing expression pattern of miRs can be effective in response to treatment and inhibition of drug resistance. In this paper, we set out to evaluate the effect of miRs in pathogenesis and treatment of MPN.
Insights
MicroRNAs (miRs) play a key role in cancer development and can be therapeutic targets. This study evaluates miRs' role in myeloproliferative neoplasias (MPNs) pathogenesis and treatment, including drug resistance.
Area of Science:
- Molecular Biology
- Oncology
- Hematology
Background:
- MicroRNAs (miRs) are non-coding RNAs regulating gene expression, crucial in cancer development.
- Myeloproliferative neoplasms (MPNs) are hematologic malignancies linked to genetic mutations like BCR-ABL and JAK2V617F.
- Aberrant miR expression is implicated in MPN pathogenesis, progression, and treatment response.
Purpose of the Study:
- To investigate the multifaceted role of miRs in the pathogenesis of MPNs.
- To explore the potential of miRs as therapeutic targets and prognostic factors in MPN treatment.
- To evaluate the impact of miRs on drug resistance, particularly to tyrosine kinase inhibitors like Imatinib in Chronic Myeloid Leukemia (CML).
Main Methods:
- Literature review and analysis of existing studies on miRs in MPNs.
- Examination of miR expression patterns in relation to MPN subtypes and clinical outcomes.
- Assessment of the mechanisms by which miRs influence oncogenesis and drug resistance.
Main Results:
- MiRs can act as tumor suppressors or oncogenes, influencing cancer development.
- Altered miR expression is significantly associated with MPN development, progression, and treatment efficacy.
- Specific miRs are involved in resistance to treatments like Imatinib, presenting a major clinical challenge.
Conclusions:
- MiRs are critical players in MPN pathogenesis and represent promising therapeutic targets.
- Understanding miR dysregulation can lead to improved prognostic markers and novel treatment strategies for MPNs.
- Modulating miR expression holds potential for overcoming drug resistance and enhancing treatment outcomes in MPNs.
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