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Mast cells are key players in the inflammatory response with an important role in allergic reactions and are therefore useful for assessing the risk of anaphylaxis. However, they are difficult to isolate due to their low abundance and wide distribution. To overcome this, we generated and characterized mast cell-like cells derived from human induced pluripotent stem (hiPS) cells. These hiPS cell-derived mast cells (hiPS-MCs) were generated using recombinant human bone morphogenetic protein 4 (BMP4), vascular endothelial growth factor 165 (VEGF), stem cell factor (SCF), interleukin-4 (IL-4), interleukin-6 (IL-6), and interleukin-9 (IL-9) in a StemPro-34 medium. The hiPS-MCs exhibited the morphological characteristics of human mast cells, expressing high affinity-IgE receptor (FcεRI) and mast cell markers such as tryptase, chymase, and CD117. In addition, FcεRI stimulation with agonistic anti-IgE functionally increased the expression of activation markers CD63 and CD203c, as well as the amount of released histamine. We think the hiPS-MCs generated in this study will be useful for assessing the pharmacology and toxicity of anti-allergy medicines.

journal of toxicological sciences

Human induced pluripotent stem cell-derived mast cells useful for &lt;i&gt;in vitro&lt;/i&gt; mast cell activation assay exhibiting phenotypes and morphological characteristics of human mast cells