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Updated: Mar 15, 2026
Reconstruct Human Retinoblastoma In Vitro
Published on: October 11, 2022
Epigenetic regulation of human retinoblastoma
Usha Singh1, Manzoor Ahmad Malik1, Sandeep Goswami1
1Department of Ocular Biochemistry, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Abstract:
Retinoblastoma is a rare type of eye cancer of the retina that commonly occurs in early childhood and mostly affects the children before the age of 5. It occurs due to the mutations in the retinoblastoma gene (RB1) which inactivates both alleles of the RB1. RB1 was first identified as a tumor suppressor gene, which regulates cell cycle components and associated with retinoblastoma. Previously, genetic alteration was known as the major cause of its occurrence, but later, it is revealed that besides genetic changes, epigenetic changes also play a significant role in the disease. Initiation and progression of retinoblastoma could be due to independent or combined genetic and epigenetic events. Remarkable work has been done in understanding retinoblastoma pathogenesis in terms of genetic alterations, but not much in the context of epigenetic modification. Epigenetic modifications that silence tumor suppressor genes and activate oncogenes include DNA methylation, chromatin remodeling, histone modification and noncoding RNA-mediated gene silencing. Epigenetic changes can lead to altered gene function and transform normal cell into tumor cells. This review focuses on important epigenetic alteration which occurs in retinoblastoma and its current state of knowledge. The critical role of epigenetic regulation in retinoblastoma is now an emerging area, and better understanding of epigenetic changes in retinoblastoma will open the door for future therapy and diagnosis.
Insights
Retinoblastoma, a childhood eye cancer, arises from genetic and epigenetic changes affecting the retinoblastoma gene (RB1). Understanding these epigenetic alterations is crucial for developing new therapies.
Area of Science:
- Ophthalmology
- Oncology
- Molecular Biology
Background:
- Retinoblastoma is a rare childhood eye cancer primarily affecting children under five.
- It is linked to mutations in the retinoblastoma gene (RB1), a known tumor suppressor.
- While genetic alterations were historically considered the main cause, epigenetic changes are now recognized as significant contributors.
Purpose of the Study:
- To review the current understanding of epigenetic modifications in retinoblastoma pathogenesis.
- To highlight the role of epigenetic alterations in silencing tumor suppressor genes and activating oncogenes.
- To emphasize the emerging importance of epigenetic regulation in retinoblastoma research.
Main Methods:
- Literature review focusing on genetic and epigenetic alterations in retinoblastoma.
- Analysis of epigenetic mechanisms including DNA methylation, chromatin remodeling, histone modification, and noncoding RNA.
- Synthesis of current knowledge on the role of epigenetics in retinoblastoma initiation and progression.
Main Results:
- Epigenetic changes, alongside genetic alterations, play a significant role in retinoblastoma development.
- Mechanisms like DNA methylation and histone modification can inactivate tumor suppressor genes.
- Epigenetic alterations can transform normal retinal cells into cancerous ones.
Conclusions:
- Epigenetic modifications are critical in retinoblastoma pathogenesis.
- Further research into epigenetic changes offers potential for novel diagnostic and therapeutic strategies.
- Understanding epigenetic regulation is key to advancing retinoblastoma treatment.
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