Abstract:
:Although current immune-checkpoint therapy (ICT) mainly targets lymphoid cells, it is associated with a broader remodeling of the tumor micro-environment. Here, using complementary forms of high-dimensional profiling, we define differences across all hematopoietic cells from syngeneic mouse tumors during unrestrained tumor growth or effective ICT. Unbiased assessment of gene expression of tumor-infiltrating cells by single-cell RNA sequencing (scRNAseq) and longitudinal assessment of cellular protein expression by mass cytometry (CyTOF) revealed significant remodeling of both the lymphoid and myeloid intratumoral compartments. Surprisingly, we observed multiple subpopulations of monocytes/macrophages, distinguishable by the markers CD206, CX3CR1, CD1d, and iNOS, that change over time during ICT in a manner partially dependent on IFNγ. Our data support the hypothesis that this macrophage polarization/activation results from effects on circulatory monocytes and early macrophages entering tumors, rather than on pre-polarized mature intratumoral macrophages.
journal_name
Celljournal_title
Cellauthors
Gubin MM,Esaulova E,Ward JP,Malkova ON,Runci D,Wong P,Noguchi T,Arthur CD,Meng W,Alspach E,Medrano RFV,Fronick C,Fehlings M,Newell EW,Fulton RS,Sheehan KCF,Oh ST,Schreiber RD,Artyomov MNdoi
10.1016/j.cell.2018.09.030subject
Has Abstractpub_date
2018-11-01 00:00:00pages
1014-1030.e19issue
4eissn
0092-8674issn
1097-4172pii
S0092-8674(18)31242-Xjournal_volume
175pub_type
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