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BRD4 Inhibitor Alleviates Recurrent Spontaneous Abortion via Regulating BRD4/STAT3/IL-17A Axis to Decrease the Th17

Fen Liu1, Zhenhui Zhang1, Chengying Yang1

  • 1The Obstetrics and Gynecology Department The First Hospital of Changsha Changsha China.

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Summary
This summary is machine-generated.

Bromodomain inhibitor (BETi) reduces Th17 cell differentiation, a key factor in recurrent spontaneous abortion (RSA). This inhibition occurs by decreasing STAT3-mediated IL-17A expression, offering a potential therapeutic strategy for RSA.

Keywords:
BETiBRD4IL‐17ASTAT3Th17 cell differentiationrecurrent spontaneous abortion

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Area of Science:

  • Immunology
  • Reproductive Biology
  • Pharmacology

Background:

  • Recurrent spontaneous abortion (RSA) significantly impacts women's health.
  • Th17 cell differentiation is implicated in RSA pathogenesis.
  • Targeting Th17 cells presents a potential therapeutic avenue for RSA.

Purpose of the Study:

  • To investigate the mechanism by which Bromodomain Inhibitor (BETi) suppresses Th17 cell differentiation.
  • To explore BETi's potential to mitigate recurrent spontaneous abortion (RSA).

Main Methods:

  • Investigated Th17/Treg cell differentiation and STAT3-IL-17A promoter association using ChIP and dual luciferase assays.
  • Utilized co-immunoprecipitation and yeast two-hybrid assays to confirm BRD4-STAT3 binding.
  • Assessed differentiation markers and lipid synthesis via ELISA, IHC, RT-qPCR, and Western blot in an abortion-prone mouse model.

Main Results:

  • Elevated Th17/Treg ratio, BRD4, STAT3, and IL-17A expression were observed in RSA patients.
  • BETi and STAT3 knockdown reduced Th17 cell differentiation and lipid synthesis.
  • BRD4 inhibition impaired STAT3-mediated IL-17A transcription, and BETi treatment inhibited embryo absorption in mice.

Conclusions:

  • BETi effectively inhibits Th17 cell differentiation in RSA.
  • This inhibition is mediated by reduced STAT3-driven IL-17A expression.
  • BETi demonstrates potential as a therapeutic agent for recurrent spontaneous abortion.