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Updated: Oct 9, 2025
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Retroviral Infection of Murine Embryonic Stem Cell Derived Embryoid Body Cells for Analysis of Hematopoietic Differentiation
Published on: October 20, 2014
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Endogenous Retroviral Elements in Human Development and Central Nervous System Embryonal Tumors
Tara T Doucet-O'Hare1, Jared S Rosenblum1, Ashish H Shah2
1National Cancer Institute, Center for Cancer Research, Neuro-Oncology Branch, Building 37, Room 1000, 37 Convent Drive, Bethesda, MD 20892, USA.
Journal of Personalized Medicine
|December 24, 2021
Summary
Human endogenous retroviruses (HERVs), specifically HERV-K HML-2, are linked to embryonal tumor development. Their abnormal expression, driven by epigenetic changes, may drive cancer and offer therapeutic targets.
Area of Science:
- Oncology
- Genetics
- Developmental Biology
Background:
- Human endogenous retroviruses (HERVs) are crucial for embryologic development but are normally downregulated.
- Aberrant HERV expression is implicated in oncogenesis and conferring stem cell properties.
- The HERV-K HML-2 element has been associated with embryonal atypical teratoid rhabdoid tumor (AT/RT) pathogenesis.
Purpose of the Study:
- To investigate the role of HERV-K HML-2 expression in embryonal tumor development, particularly AT/RT.
- To understand the mechanisms linking epigenetic dysregulation to HML-2 expression and tumor growth.
- To explore the potential of HML-2 as a diagnostic and therapeutic target.
Main Methods:
- Analysis of HERV-K HML-2 expression in embryonal tumors.
- Investigation of the role of SMARCB1 and chromatin remodeling in HML-2 regulation.
- Correlation of HML-2 expression with stem cell markers and tumor characteristics.
Main Results:
- Dysfunctional chromatin remodeling due to loss of SMARCB1 induces HERV-K HML-2 envelope (env) expression.
- This aberrant expression impairs cellular differentiation and migration, promoting AT/RT growth.
- Epigenetic dysregulation in other embryonal tumors may also facilitate HML-2 expression.
Conclusions:
- HERV-K HML-2 plays a significant role in the pathogenesis of AT/RT and potentially other embryonal tumors.
- Targeting HML-2 expression or the pathways regulating it presents a promising therapeutic strategy.
- HML-2 expression could serve as a diagnostic biomarker for embryonal tumors.
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