[HTML][HTML] A stromal cell niche sustains ILC2-mediated type-2 conditioning in adipose tissue

BMJ Rana, E Jou, JL Barlow… - Journal of Experimental …, 2019 - rupress.org
BMJ Rana, E Jou, JL Barlow, N Rodriguez-Rodriguez, JA Walker, C Knox, HE Jolin…
Journal of Experimental Medicine, 2019rupress.org
Group-2 innate lymphoid cells (ILC2), type-2 cytokines, and eosinophils have all been
implicated in sustaining adipose tissue homeostasis. However, the interplay between the
stroma and adipose-resident immune cells is less well understood. We identify that white
adipose tissue–resident multipotent stromal cells (WAT-MSCs) can act as a reservoir for IL-
33, especially after cell stress, but also provide additional signals for sustaining ILC2.
Indeed, we demonstrate that WAT-MSCs also support ICAM-1–mediated proliferation and …
Group-2 innate lymphoid cells (ILC2), type-2 cytokines, and eosinophils have all been implicated in sustaining adipose tissue homeostasis. However, the interplay between the stroma and adipose-resident immune cells is less well understood. We identify that white adipose tissue–resident multipotent stromal cells (WAT-MSCs) can act as a reservoir for IL-33, especially after cell stress, but also provide additional signals for sustaining ILC2. Indeed, we demonstrate that WAT-MSCs also support ICAM-1–mediated proliferation and activation of LFA-1–expressing ILC2s. Consequently, ILC2-derived IL-4 and IL-13 feed back to induce eotaxin secretion from WAT-MSCs, supporting eosinophil recruitment. Thus, MSCs provide a niche for multifaceted dialogue with ILC2 to sustain a type-2 immune environment in WAT.
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