lung-cancer

Losing a key transcription factor in lung cancer triggers both loss of cell polarity and harmful lysosome buildup

FOXA1 is a 'pioneer' transcription factor that helps establish and maintain the identity of epithelial cells. In early-stage lung adenocarcinoma, FOXA1 keeps cells organized and polarized. This study investigated what happens when FOXA1 function is partially lost.

Dan Manning

Dan Manning

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Losing a key transcription factor in lung cancer triggers both loss of cell polarity and harmful lysosome buildup

Losing a key transcription factor in lung cancer triggers both loss of cell polarity and harmful lysosome buildup

FOXA1 is a 'pioneer' transcription factor that helps establish and maintain the identity of epithelial cells. In early-stage lung adenocarcinoma, FOXA1 keeps cells organized and polarized. This study investigated what happens when FOXA1 function is partially lost.

Using a multi-omics approach (ATAC-seq, RNA-seq, CUT&Tag), researchers found that partial FOXA1 loss disrupts the chromatin landscape in ways that promote epithelial-to-mesenchymal transition (EMT) — a process linked to cancer invasion and metastasis. Simultaneously, FOXA1 loss was found to normally restrain lysosome biogenesis; when FOXA1 is reduced, lysosomes (cellular recycling compartments) proliferate abnormally. This lysosomal dysregulation may further fuel cancer progression by altering cellular recycling and signaling.

The study reveals a dual role for FOXA1 as both a polarity guardian and a lysosome regulator, with loss of either function potentially accelerating lung cancer progression.

Key Findings

  • FOXA1 maintains epithelial cell polarity in early-stage lung adenocarcinoma
  • Partial FOXA1 loss promotes epithelial plasticity and EMT-associated chromatin remodeling
  • FOXA1 normally restrains lysosome biogenesis; its loss causes abnormal lysosome proliferation
  • Multi-omics analysis (ATAC-seq, RNA-seq, CUT&Tag) revealed FOXA1-dependent chromatin states
  • A newly synthesized TGF-β receptor inhibitor was used to define epithelial vs. mesenchymal chromatin states

Implications

FOXA1's dual role in maintaining polarity and restraining lysosomes makes it a compelling target for preventing lung adenocarcinoma progression. Restoring FOXA1 activity or blocking the lysosomal proliferation that follows its loss could be therapeutic strategies in early-stage NSCLC.

Caveats

Preprint, not peer reviewed. Primarily cell-line based studies; clinical validation needed. The specific contribution of lysosomal dysregulation to tumor progression in patients is not yet established. Summary based on abstract only.

Source: bioRxiv — 2026-04-10

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