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<p>The immunomodulatory properties of mesenchymal stem/stromal cells (MSCs) are strongly influenced by IFN-γ priming and may vary depending on their tissue of origin. This study investigates whether the immunoregulatory responses of human amniotic fluid-derived MSCs (hAF-MSCs) to IFN-γ are altered when derived from individuals with unexplained recurrent pregnancy loss (RPL). We analyzed 10 well-characterized hAF-MSC clones, equally divided into non-RPL and RPL groups, to assess IFN-γ-induced expression of immunomodulatory genes. Additionally, we evaluated the paracrine effects of MSC-conditioned medium on T regulatory (Treg) cell induction and macrophage polarization. Significant differences were observed between the two groups in the expression of immunomodulatory markers following IFN-γ priming, as well as in their capacity to induce Treg cells and modulate M1/M2 macrophage polarization. These findings support the hypothesis that dysregulated immune pathways contribute to unexplained RPL by revealing impaired IFN-γ responsiveness in hAF-MSCs from fetuses derived from couples with the history of RPL.</p>

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Immunomodulatory effects of primed amniotic fluid-derived mesenchymal stem/stromal cells with IFN-γ from unexplained recurrent miscarriage sources

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月3日

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  • Seyed Mehdi Hoseini,
  • Ahmad Reza Bahrami,
  • Seyed Mehdi Kalantar,
  • Mohammad Hasan Sheikhha,
  • Behrouz Aflatoonian,
  • Nasrin Ghasemi,
  • Elham Sadat Hosseini,
  • Maryam M. Matin,
  • Fateme Montazeri

摘要

The immunomodulatory properties of mesenchymal stem/stromal cells (MSCs) are strongly influenced by IFN-γ priming and may vary depending on their tissue of origin. This study investigates whether the immunoregulatory responses of human amniotic fluid-derived MSCs (hAF-MSCs) to IFN-γ are altered when derived from individuals with unexplained recurrent pregnancy loss (RPL). We analyzed 10 well-characterized hAF-MSC clones, equally divided into non-RPL and RPL groups, to assess IFN-γ-induced expression of immunomodulatory genes. Additionally, we evaluated the paracrine effects of MSC-conditioned medium on T regulatory (Treg) cell induction and macrophage polarization. Significant differences were observed between the two groups in the expression of immunomodulatory markers following IFN-γ priming, as well as in their capacity to induce Treg cells and modulate M1/M2 macrophage polarization. These findings support the hypothesis that dysregulated immune pathways contribute to unexplained RPL by revealing impaired IFN-γ responsiveness in hAF-MSCs from fetuses derived from couples with the history of RPL.