Blocking estrogen precursor transport into breast cancer cells suppresses tumor growth without harming normal cells.

New SOAT (SLC10A6) inhibitors (compounds 12 and 24) markedly reduced DHEAS uptake in MCF-7 breast cancer cells, decreasing intracellular estradiol synthesis and suppressing estrogen-dependent proliferation without cytotoxicity to normal cells. SOAT is an upstream regulator of intracrine estrogen…

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Blocking estrogen precursor transport into breast cancer cells suppresses tumor growth without harming normal cells.

Blocking estrogen precursor transport into breast cancer cells suppresses tumor growth without harming normal cells.

New SOAT (SLC10A6) inhibitors (compounds 12 and 24) markedly reduced DHEAS uptake in MCF-7 breast cancer cells, decreasing intracellular estradiol synthesis and suppressing estrogen-dependent proliferation without cytotoxicity to normal cells. SOAT is an upstream regulator of intracrine estrogen biosynthesis.

Key Findings

  • New SOAT inhibitors (compounds 12 and 24) reduced DHEAS uptake
  • Inhibition decreased intracellular estradiol synthesis and estrogen-dependent proliferation
  • No cytotoxicity to normal cells
  • SOAT is a critical upstream regulator of intracrine estrogen in ER-positive breast cancer
  • Compounds 12 and 24 are promising preclinical candidates

Implications

SOAT inhibitors could provide a novel strategy for postmenopausal ER-positive breast cancer, particularly those resistant to aromatase inhibitors.

Caveats

In vitro cell line study; abstract-only. In vivo validation and clinical translation needed. SOAT expression varies across patients.

Source: Scientific reports — 2026-04-10

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