Although dexamethasone has been reported to dampen NFkB signaling by elevating IkBα transcription (Auphan et al., 1995; Scheinman et al., 1995), it only had a partial effect in Cdh1-null HF stem cells under conditions where IkBα phosphorylation was enhanced (Figure 7E). Here, NFKBIA is linked to hydrops fetalis.