16,16-Dimethyl Prostaglandin E2

16,16-Dimethyl Prostaglandin E2 (CAS No.: 39746-25-3) is a synthetic, metabolically stable analog of prostaglandin E2 that functions as a bioactive lipid mediator widely used in immunology, stem cell biology, and transplantation research. This compound acts as an agonist at multiple prostaglandin E (EP) receptor subtypes, particularly EP2 and EP4, and modulates downstream signaling pathways including cAMP and Wnt, thereby playing a critical role in the regulation of hematopoietic stem cell (HSC) homeostasis. It also serves as a competitive inhibitor of 15-hydroxyprostaglandin dehydrogenase, contributing to its prolonged in vivo half-life and sustained biological activity. In vitro, 16,16-Dimethyl Prostaglandin E2 has been shown to enhance HSC expansion and self-renewal while limiting differentiation, with activity typically observed in the nanomolar to low micromolar range depending on the experimental system, and minimal perturbation of vascular development relative to cyclooxygenase inhibition. In vivo studies demonstrate its capacity to delay transplant rejection and modulate immune responses, particularly when used in combination with immunosuppressive agents such as cyclosporine, highlighting its utility in transplantation models. Additionally, its pharmacological profile includes effects on smooth muscle contraction and mucosal protection, supporting broader applications in physiological and pharmacological studies. Experimental dosing and exposure conditions vary according to specific model systems and research objectives, making this compound a versatile tool for investigating prostaglandin signaling and stem cell regulation.