Transposable Element Expression in Acute Myeloid Leukemia Transcriptome and Prognosis.

Area of Science:

• Genomics
• Cancer Biology
• Molecular Oncology

Background:

• Transposable elements (TE) constitute over half of the human genome.
• Comprehensive analysis of TE expression in acute myeloid leukemia (AML) and its prognostic implications is lacking.
• Understanding TE expression patterns can offer new insights into AML pathogenesis.

Purpose of the Study:

• To characterize TE expression in adult acute myeloid leukemia (AML) patients.
• To investigate the relationship between TE expression, mutations, and prognosis in AML.
• To identify a TE-based signature for predicting AML patient outcomes.

Main Methods:

• Transcriptome data from 178 adult AML patients (The Cancer Genome Atlas) were analyzed.
• Multivariate linear models assessed mutation-specific TE dysregulation.
• Unpenalized Cox regression identified prognostic TE expression signatures.
• Validation performed in independent pediatric and relapsed adult AML cohorts.

Main Results:

• Distinct TE expression patterns were associated with specific mutations and transcriptional networks.
• A novel TE expression signature comprising 14 prognostic TE transcripts (TEP) was identified.
• TEP effectively classified AML patients into high/low-risk groups, independent of established risk factors.
• TEP demonstrated prognostic value in independent pediatric and relapsed adult AML cohorts.

Conclusions:

• TE expression serves as a robust and independent biomarker for AML prognosis.
• The identified TEP signature offers novel insights into AML biology and risk stratification.
• Further research into TE expression in other cancers is warranted.