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This study identified eight potential genes linked to hepatoblastoma (HB) risk through a large, multi-ancestry transcriptome-wide association study (TWAS). These findings advance our understanding of the genetic causes of this rare embryonic liver cancer.

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Area of Science:

  • Genetics
  • Oncology
  • Molecular Biology

Background:

  • Hepatoblastoma (HB) is a rare embryonic liver tumor with rising global incidence.
  • Understanding the genetic factors contributing to HB is crucial due to its increasing prevalence.

Purpose of the Study:

  • To conduct the largest transcriptome-wide association study (TWAS) for hepatoblastoma (HB) to date.
  • To identify novel genetic risk factors associated with HB across diverse ancestries.

Main Methods:

  • A meta-analysis of multiancestry TWAS (METRO) was performed on European, Latino, and African American cohorts.
  • Expression quantitative loci (eQTL) data and independent cohorts were utilized for gene exploration.
  • Ancestry-specific gene set enrichment analyses and METRO-Egger sensitivity analyses were conducted.

Main Results:

  • A meta-analysis identified 28 genes significantly associated with HB risk, with 15 showing nominal significance in at least two ancestries.
  • Eight key genes, including OXER1, FADS1, and UGDH, were highlighted.
  • These identified genes were expressed in fetal liver cells and showed differential expression in HB tumor tissues.

Conclusions:

  • Eight potential genes associated with HB risk were pinpointed using multiancestry genome-wide association study data.
  • This study represents the largest HB TWAS, providing a foundation for further genetic investigations into HB etiology.