NewslettersUmbilical & Placental Cell News Immunomodulation by Placenta-Derived Decidua Stromal Cells. Role of Histocompatibility, Accessory Cells and Freeze–Thawing By Bob - November 10, 2022 0 Investigators showed that histocompatibility and CD14+ monocyte cells had an impact on human placenta-derived decidua stromal cells immunomodulation but frozen–thawed or freshly prepared cells did not. [Cytotherapy] Abstract