TY - JOUR
T1 - Engagement of the costimulatory molecule ICOS in tissues promotes establishment of CD8+ tissue-resident memory T cells
AU - Peng, Changwei
AU - Huggins, Matthew A.
AU - Wanhainen, Kelsey M.
AU - Knutson, Todd P.
AU - Lu, Hanbin
AU - Georgiev, Hristo
AU - Mittelsteadt, Kristen L.
AU - Jarjour, Nicholas N.
AU - Wang, Haiguang
AU - Hogquist, Kristin A.
AU - Campbell, Daniel J.
AU - Borges da Silva, Henrique
AU - Jameson, Stephen C.
N1 - Publisher Copyright:
© 2021 Elsevier Inc.
PY - 2022/1/11
Y1 - 2022/1/11
N2 - Elevated gene expression of the costimulatory receptor Icos is a hallmark of CD8+ tissue-resident memory (Trm) T cells. Here, we examined the contribution of ICOS in Trm cell differentiation. Upon transfer into WT mice, Icos−/− CD8+ T cells exhibited defective Trm generation but produced recirculating memory populations normally. ICOS deficiency or ICOS-L blockade compromised establishment of CD8+ Trm cells but not their maintenance. ICOS ligation during CD8+ T cell priming did not determine Trm induction; rather, effector CD8+ T cells showed reduced Trm differentiation after seeding into Icosl−/− mice. IcosYF/YF CD8+ T cells were compromised in Trm generation, indicating a critical role for PI3K signaling. Modest transcriptional changes in the few Icos−/− Trm cells suggest that ICOS-PI3K signaling primarily enhances the efficiency of CD8+ T cell tissue residency. Thus, local ICOS signaling promotes production of Trm cells, providing insight into the contribution of costimulatory signals in the generation of tissue-resident populations.
AB - Elevated gene expression of the costimulatory receptor Icos is a hallmark of CD8+ tissue-resident memory (Trm) T cells. Here, we examined the contribution of ICOS in Trm cell differentiation. Upon transfer into WT mice, Icos−/− CD8+ T cells exhibited defective Trm generation but produced recirculating memory populations normally. ICOS deficiency or ICOS-L blockade compromised establishment of CD8+ Trm cells but not their maintenance. ICOS ligation during CD8+ T cell priming did not determine Trm induction; rather, effector CD8+ T cells showed reduced Trm differentiation after seeding into Icosl−/− mice. IcosYF/YF CD8+ T cells were compromised in Trm generation, indicating a critical role for PI3K signaling. Modest transcriptional changes in the few Icos−/− Trm cells suggest that ICOS-PI3K signaling primarily enhances the efficiency of CD8+ T cell tissue residency. Thus, local ICOS signaling promotes production of Trm cells, providing insight into the contribution of costimulatory signals in the generation of tissue-resident populations.
KW - ICOS
KW - PI3K
KW - resident memory T cells
UR - http://www.scopus.com/inward/record.url?scp=85122271938&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122271938&partnerID=8YFLogxK
U2 - 10.1016/j.immuni.2021.11.017
DO - 10.1016/j.immuni.2021.11.017
M3 - Article
C2 - 34932944
AN - SCOPUS:85122271938
SN - 1074-7613
VL - 55
SP - 98-114.e5
JO - Immunity
JF - Immunity
IS - 1
ER -