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Updated: Feb 15, 2026

A Reporter Assay to Analyze Intronic microRNA Maturation in Mammalian Cells
Published on: June 16, 2022
Alteration in microRNA-17-92 dynamics accounts for differential nature of cellular proliferation
Dola Sengupta1, Vinodhini Govindaraj1, Sandip Kar1
1Department of Chemistry, IIT Bombay, Mumbai, India.
Abstract:
MicroRNAs associated with the mir-17-92 cluster are crucial regulators of the mammalian cell cycle, as they inhibit transcription factors related to the E2F family that tightly control decision-making events for a cell to commit for active cellular proliferation. Intriguingly, in many solid cancers, these mir-17-92 cluster members are overexpressed, whereas in some hematopoietic cancers they are down-regulated. Our proposed model of the Myc/E2F/mir-17-92 network demonstrates that the differential expression pattern of mir-17-92 in different cell types can be conceived due to having a contrasting E2F dynamics induced by mir-17-92. The model predicts that by explicitly altering the mir-17-92-related part of the network, experimentally it is possible to control cellular proliferation in a cell type-dependent manner for therapeutic intervention.
Insights
MicroRNAs from the mir-17-92 cluster regulate cell cycle progression. Their varied expression in cancers suggests targeting this network could control cell proliferation for cancer therapy.
Area of Science:
- Molecular Biology
- Cancer Research
- Systems Biology
Background:
- MicroRNAs (miRNAs) from the mir-17-92 cluster are key regulators of the mammalian cell cycle.
- These miRNAs inhibit E2F transcription factors, which control cell cycle commitment and proliferation.
- Aberrant mir-17-92 expression is observed in various cancers, with overexpression in solid tumors and downregulation in hematopoietic malignancies.
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