ArticleProceedings of the National Academy of Sciences of the United States of America2026
Constitutively high levels of endogenous soluble ST2 inhibit food allergic responses in mice.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- JAK-STAT signaling pathway in cancer: from molecular mechanisms to clinical intervention.Molecular cancer · 2026Review
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23 authors.
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Abstract
IL-33-induced signals via membrane-bound ST2 (ST2L) are critical for allergies. However, the physiological role of endogenous soluble ST2 (sST2) remains elusive. Here, we generated sST2-deficient mice with intact ST2L using the CRISPR/Cas9 system. Skin fibroblasts constitutively released sST2 protein at extremely high levels compared to mast cells, which did not reflect the expression levels of sST2 mRNA. This discrepancy can be partly explained by the sST2 protein degradation mediated by mast cell proteases. Accordingly, sST2 deficiency did not affect IL-33- and/or IgE plus antigen-stimulated mast cell activation in vitro. We provided evidence that constitutively high levels of sST2 suppress food allergies in mice by inhibiting IL-33-dependent, both expansion of jejunum mast cells and enhancement of their degranulation. Analysis of bone marrow chimeric mice under steady-state conditions showed that circulating sST2 was derived almost equally from hematopoietic and nonhematopoietic cells. Increased circulating sST2 in food-allergic mice was possibly and partly derived from fibroblasts stimulated by locally released IL-4 and IL-13. In conclusion, endogenous sST2 contributes to the suppression of food allergies.
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