Related Experiment Video
Updated: Feb 14, 2026
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Utilizing Functional Genomics Screening to Identify Potentially Novel Drug Targets in Cancer Cell Spheroid Cultures
Published on: December 26, 2016
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LINE-1 Transcript Heterogeneity in Non-Small Cell Lung Cancers Is Driven by Host Genomic Context and Conserved
Yingshan Wang1, Kenneth S Ramos1
1Center for Genomic and Precision Medicine, Texas A&M Institute of Biosciences and Technology, Houston, TX 77030, USA.
Cancers
|February 13, 2026
Summary
Long INterspersed Element-1 (LINE-1) retrotransposons are reactivated in lung cancer, driving genomic instability. This study characterized LINE-1 activity in non-small cell lung cancer cell lines, revealing conserved patterns and potential oncogenic interactions.
Area of Science:
- Genomics
- Molecular Biology
- Cancer Research
Background:
- Long INterspersed Element-1 (LINE-1) retrotransposons constitute a significant portion of the human genome.
- LINE-1 elements are epigenetically silenced during development but reawaken in cancer, contributing to genomic instability and immune evasion.
Purpose of the Study:
- To categorize LINE-1 transcripts in non-small cell lung cancer (NSCLC) cell lines.
- To investigate the relationship between LINE-1 activity, genomic features, and oncogenic pathways in NSCLC.
Main Methods:
- Analysis of LINE-1 transcripts (subfamily, length, orientation, origin, distribution) in 121 NSCLC cell lines from the Cancer Cell Line Encyclopedia (CCLE).
- Mapping of high-prevalence LINE-1 insertions to nearby genes to identify functional interactions.
- Integrative analysis of LINE-1 activity with genomic and clinical data.
Main Results:
- LINE-1 expression in NSCLC is dominated by young subfamilies (L1HS, L1PA2-L1PA5).
- Conserved chromosomal patterns of LINE-1 activity were observed across NSCLC subtypes, with enrichment on Chromosome 4 and X Chromosome.
- Lung squamous cell carcinoma (LSQCC) showed the highest L1HS expression; race and age showed modest influence.
- Recurrent LINE-1 insertion hotspots were identified near cancer-associated genes (e.g., RB1, FTO), suggesting cis-regulatory remodeling of oncogenic pathways.
Conclusions:
- LINE-1 transcript heterogeneity in NSCLC is influenced by host genomic architecture and conserved active hotspots.
- These findings offer new insights into LINE-1-mediated genetic and epigenetic dysregulation in cancer development.
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