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H19 and IGF2 imprinting from embryogenesis to oncogenesis
Bella Ortega1, Rida Saeed1, Sloan White1
1Georgetown University Medical Center, Washington, DC, United States.
Frontiers in Cell and Developmental Biology
|March 27, 2026
Summary
The H19/IGF2 locus is crucial for fetal development. Dysregulation of this imprinted gene locus contributes to cancer by reactivating developmental pathways, highlighting its therapeutic potential.
Area of Science:
- Epigenetics
- Developmental Biology
- Cancer Biology
Background:
- The H19/IGF2 locus is essential for normal fetal development.
- Its epigenetic dysregulation, known as loss of imprinting (LOI), is linked to tumorigenesis.
- Shared signaling pathways like PI3K/AKT are involved in both development and cancer.
Purpose of the Study:
- To review the mechanisms regulating H19/IGF2 imprinting.
- To examine the role of DNA methyltransferases and signaling pathways in H19/IGF2 regulation.
- To explore the implications of H19/IGF2 dysregulation in cancer and imprinting disorders.
Main Methods:
- Review of existing literature on H19/IGF2 imprinting.
- Analysis of DNA methyltransferase roles in locus regulation.
- Examination of signaling pathways (PI3K/AKT, Wnt3) in development and cancer.
Main Results:
- H19/IGF2 imprinting is controlled by DNA methylation, coordinating gene expression for development.
- IGF2 promotes growth, while H19 (long non-coding RNA) restricts overgrowth and influences EMT.
- LOI disrupts this balance, leading to cancers via pathways like Wnt3 and activating EMT through H19 overexpression.
Conclusions:
- The H19/IGF2 locus balance is vital for development; its epigenetic disruption fuels cancer.
- Tumors exploit reactivated developmental pathways driven by H19/IGF2.
- Targeting H19/IGF2 imprinting offers a potential therapeutic strategy for cancer.
Keywords:
DNA methylationH19/IGF2 locuscancer epigeneticsembryonic developmentepigenetic regulationgenomic imprintingloss of imprinting (LOI)noncoding RNAMore Related Videos
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