An Interleukin-21-interleukin-10-STAT3 Pathway is Critical for Functional Maturation of Memory CD8+ T Cells

Overview

Journal Immunity

Publisher Cell Press

Specialty Allergy & Immunology

Date 2011 Nov 29

PMID 22118527

Citations 251

Authors

Weiguo Cui

Ying Liu

Jason S Weinstein

Joseph Craft

Susan M Kaech

Affiliations

Soon will be listed here.

Abstract

Memory CD8(+) T cells are critical for long-term immunity, but the genetic pathways governing their formation remain poorly defined. This study shows that the IL-10-IL-21-STAT3 pathway is critical for memory CD8(+) T cell development after acute LCMV infection. In the absence of either interleukin-10 (IL-10) and IL-21 or STAT3, virus-specific CD8(+) T cells retain terminal effector (TE) differentiation states and fail to mature into protective memory T cells that contain self-renewing central memory T cells. Expression of Eomes, BCL-6, Blimp-1, and SOCS3 was considerably reduced in STAT3-deficient memory CD8(+) T cells, and BCL-6- or SOCS3-deficient CD8(+) T cells also had perturbed memory cell development. Reduced SOCS3 expression rendered STAT3-deficient CD8(+) T cells hyperresponsive to IL-12, suggesting that the STAT3-SOCS3 pathway helps to insulate memory precursor cells from inflammatory cytokines that drive TE differentiation. Thus, memory CD8(+) T cell precursor maturation is an active process dependent on IL-10-IL-21-STAT3 signaling.

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