Abstract
Stem-like progenitor CD8+ T (TPRO) cells sustain cytotoxic immunity during chronic infection and cancer through quiescence, multipotency and self-renewal, hallmarks shared with memory T cells. However, how these properties are maintained under persistent antigen stimulation remains unclear. Here we identify the genomic organizer SATB1 as selectively enriched in both TPRO and memory CD8+ T cells. Given its role in promoting quiescence in hematopoietic stem cells, we hypothesized that SATB1 supports CD8+ T cell stemness. Using CD8+ T cell-specific CRISPR deletion of the Satb1 gene, we show that SATB1 is essential for maintaining TPRO cells during chronic lymphocytic choriomeningitis virus infection and for memory CD8+ T cell formation during acute infection. Multi-omic profiling revealed that SATB1 regulates the chromatin accessibility, transcriptional activity and genome architecture of stemness-associated genes including Tcf7, Bach2 and Myb. These findings reveal a critical role for SATB1 in preserving the transcriptional and epigenetic programs that sustain the stem-like state of antigen-specific CD8+ T cells.
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Data availability
The CD8+ T cell subset-specific ATAC-seq and CUT&Tag-seq (H3K27ac and H3K27ac) data were extracted from GSE149752 and GSE149810, respectively. Data from the ChIP–seq for SATB1 were extracted from GSE191146 (ref. 43). Data to create the module score for the three subsets of CD8+ T cells were extracted from GSE129139. The sequencing data generated in this study have been uploaded to the Gene Expression Omnibus with the following accession numbers: bulk RNA data (GSE275974); bulk ATAC data (GSE275969); single-cell Multiome data (GSE276087); Hi-C data (GSE302478). Source data are provided with this paper.
Code availability
This article does not report any original code. All functionality used to analyze the sequencing data is publicly available via the software packages described in Methods.
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Acknowledgements
This work is supported by National Institutes of Health grant nos. AI176611 and AI148403 (W.C.). S.L., R.B. and A.B. are members of the Medical Scientist Training Program at the Medical College of Wisconsin, which is partially supported by a training grant from the National Institute of General Medical Sciences (no. T32-GM080202). We thank the NIH Tetramer Core Facility (NIH Contract 75N93020D00005 and RRID:SCR_026557) for providing LCMV tetramers. We thank the Robert H. Lurie Comprehensive Cancer Center of Northwestern University for the use of the Flow Cytometry Core Facility. The Robert H. Lurie Comprehensive Cancer Center is supported in part by a National Cancer Institute Cancer Center Support Grant no. P30 CA060553. We also thank the Mary Jane McMillen Crowe Foundation for the support of the multispectral flow cytometer. Finally, we sincerely thank S. Lin for performing the foundational Hi-C data analysis that enabled the subsequent in-depth analyses and interpretation presented in this article.
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Contributions
S.L. and W.C. designed and performed the experiments and analyzed the data. H.N., Y.Z. and A.B. helped perform the flow cytometry and FACS experiments. J.S., K.G., J.L.S., M.V.-C., R.K.S. and A.E.Z. helped with the sequencing experiments. R.B. and Z.X. helped with the sequencing data analysis and visualization. T.K.-S. helped with the SATB1 ChIP–seq analysis and provided helpful insights. J.F. and B.Z. provided insights and helped with the tumor experiments. S.L. and W.C. wrote the paper. W.C. supervised the study.
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Nature Immunology thanks Charalampos Spilianakis and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Peer reviewer reports are available. Primary Handling Editor: L. A. Dempsey, in collaboration with the Nature Immunology team.
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Extended data
Extended Data Fig. 1 The TPRO subset shows enriched SATB1 expression.
a, Flow plot illustrating CX3CR1 expression stratified by SATB1 levels. b, Representative western blots and summary graph of total SATB1 normalized by GAPDH levels in progenitor, effector, and exhausted CD8+ T cell subsets (n = 2). c, Genomic tracks of mapped ATAC-seq (GSE149752), H3K27ac CUT&TAG, H3K27me3 CUT&TAG (GSE149810) for the 3 subsets of CD8+ T cells at the Satb1 locus and nearby Gm20098 locus, displayed on WashU Epigenome Browser. The transcription start site is marked by TSS, with red bars denoting the promoter and enhancer sites.
Extended Data Fig. 2 SATB1 deficiency promotes CD8+ T cell proliferation in various tissues in chronic viral infection.
a-b, Knock-out efficacy of SATB1 in LCMV Cl13 infection; representative flow plots (a) and western Blot (b) of SATB1 comparing sgCtrl (control; orange) and sgSatb1 (SATB1-deficient; blue) P14 cells. c-d, Summary of liver P14 frequency (c) and numbers (d) at various timepoints p.i. (n = 5). e-f, Summary of lung P14 frequency (e) and numbers (f) at various timepoints p.i. (n = 5). g, Experimental design of CRISPR-RNP in single-transfer experiment: CD45.1+ P14 CD8+ cells were transduced with sgCtrl (control; orange cell) or sgSatb1 (SATB1-deficient; blue cell) and then adoptively single-transferred into separate CD45.2+ C57BL/6 recipient mice, which were subsequently infected with LCMV Cl13. h, Flow plot and summary showing the frequency of splenic sgCtrl and sgSatb1P14 cells in single-transfer experiment on day 21 p.i. (n = 5). i, Representative flow plots and summary displaying the frequencies of sgCtrl and sgSatb1 P14 cells in lymph nodes on day 8 p.i. j, Representative flow plots and summary data of SATB1 protein expression in Ly108+ precursor and Tim3+ early effector cells on day 8 p.i. (n = 5). Data in a-j are representative of 2-3 independent experiments, and data points with bars in c-f are means ± s.d. All data points (n) represent individual mice as biological replicates. Exact P-values are shown in each graph; ns = not significant; two-sided multiple pair t- test with Holm-Šídák correction was used in c-f, and i; two-sided unpaired t-test was used in h; two-sided paired t-test was used in j.
Extended Data Fig. 3 SATB1 is essential for maintaining TPRO quiescence during chronic infection.
a-b, Representative flow plots and summary displaying gMFI of T-bet (a) and EOMES (b) in splenic sgCtrl (orange) and sgSatb1 (blue) P14 cells on day 21 p.i. with LCMV Cl13 (n = 5). c, Representative flow plots and summary of CD8+ T cells subset distribution in lymph nodes, showing TPRO (Ly108+ CX3CR1−), TEFF (Ly108− CX3CR1+), and TEXH (Ly108− CX3CR1−) sgCtrl (orange) and sgSatb1(blue) P14 cells on day 21 p.i. (n = 9). d, Representative flow plot and summary of TPRO1 (Ly108+ CD62L+) and TPRO2 (Ly108+ CD62L−) frequencies of sgCtrl and sgSatb1 P14 cells in lymph nodes on day 21 p.i. (n = 9). e, PCA plot of RNA-seq data for sgCtrl and sgSatb1 P14 cells on day 21 p.i. with LCMV Cl13 (n = 5). f, Heatmaps of 1767 DEGs between sgCtrl (838 genes) and sgSatb1 (929 genes) P14 cells (adjusted p value < 0.05); selected DEGs are indicated. g, GSEA of hematopoietic cell lineage commitment from KEGG (Pathway ID: mmu04640) between sgCtrl and sgSatb1 P14 cells. h-m, Flow and summary plots corresponding to Fig. 3j. Representative flow plot and summary of Ki67 expression (h), Annexin-V (i), granzyme B (j), TCF1 (k), LEF1 (l), and CD62L (m), and in sgCtrl and sgSat1 splenic P14 cells on day 14 post-transfer (n = 5). All data points (n) represent individual mice as biological replicates. Exact P-values are shown in each graph. Data in a-d and h-m are representative of 2-3 independent experiments. Two-sided paired t-test is used in a-b, h-j; two-sided multiple pair t-test with Holm-Šídák correction was used in c-d; ns = not significant.
Extended Data Fig. 4 SATB1 limits terminal differentiation in the chronic phase of infection.
a-d, Representative flow plots and summary showing gMFI of CD101 (a), LAG3 (b), TIM-3 (c), and TOX (d) in sgCtrl (control; orange) and sgSatb1 (SATB1-deficient; blue) splenic P14 cells on day 21 p.i. with LCMV Cl13 (n = 5). e, Heatmaps of DEGs representing inhibitory molecules between sgCtrl and sgSatb1 (adjusted p value < 0.05; n = 5). f-j, Flow and summary plots corresponding to Fig. 4h (n = 5). f, Summary of splenic P14 frequencies in sgCtrl (orange) and sgSatb1 (blue) as shown Fig. 4h. g, Representative flow plots and summary of Ki67+ percentages in P14 cells. h, Summary of absolute cell number in TPRO, TEFF, and TEXH subsets. i-j, Representative flow plots and summary LEF1+ percentages (i), and CD62L+ percentages (j) in P14 cells (n = 5). k, Summary data of viral titer in the sera from experimental mice receiving sgCtrl or sgSatb1 P14 cells (n = 5; bar and interval represent means ± s.d.). All data points (n) represent individual mice as biological replicates. Exact P-values are shown in each graph. Data in a-d and f-j are representative of 2-3 independent experiments; two-sided paired t-test was used in a-g and i-j; two-sided multiple paired t-test with Holm-Šídák correction was used in h; unpaired t-test with Welch’s correction was used in k; ns = not significant.
Extended Data Fig. 5 Satb1fl/fl-CD8cre mice phenocopy CRISPR-mediated SATB1-deletion mice.
a, Schematic of the experimental design: Satb1 + /+ CD8Cre (WT) or Satb1fl/fl CD8Cre (KO) mice were infected with LCMV Cl13 and analyzed at day 21 p.i. b, Frequency of GP33-41-specific CD8+ T cells in spleen. c-d, Representative flow cytometry plots of GP33-41 tetramer staining (c) and CD8+ T-cell subset distribution. e, Quantification of TPRO and combined TEFF + TEXH subsets among GP33-41-specific CD8+ T cells. f-i, Representative flow plots and summary of SATB1 (f), TCF-1 (g), PD-1 (h), and CXCR6 (i) expression in WT and KO GP33-41-specific CD8+ T cells. Data represent two independent experiments with n = 5 mice per group. All data points (n) represent individual mice as biological replicates. Bar and interval in graphs represent means ± s.d. Exact P-values are shown in each graph. Statistical significance was determined by two-sided unpaired t-test with Welch’s correction in b, f-i; multiple unpaired t-test with Holm-Šídák correction was used in e.
Extended Data Fig. 6 SATB1 restrains effector differentiation during acute infection.
a, Knockout efficacy of SATB1 on day 35 p.i. with LCMV Armstrong: representative flow plots and a summary of SATB1 gMFI comparing sgCtrl (control; orange) and sgSatb1 (SATB1-deficient; blue) P14 cells (n = 5). b, Representative flow plots depicting sgCtrl (top panel; orange) and sgSatb1 (bottom panel; blue) KLRG1+ IL-7Rα+ P14 short-lived effector cells (SLECs) and KLRG1− IL-7Rα+ memory precursor effector cells (MPECs) isolated from blood at various post-infection timepoints. c-d, Summary of sgCtrl and sgSatb1 P14 SLECs (c) and MPECs (d) at various post-infection timepoints shown in b (n = 12; data points with interval represents means ± s.d.). e, Representative flow plots displaying the frequencies of sgCtrl (orange) and sgSatb1 (blue) splenic P14 cells on day 7 p.i. with LCMV Armstrong. f, Representative flow plots and summary depicting the frequencies of sgCtrl and sgSatb1 SLECs and MPECs isolated from splenocytes (n = 5). g-i, Representative flow plots and summary showing the percentages of TCF-1+ (g), CXCR3+ (h), and CX3CR1+ P14 cells in sgCtrl and sgSatb1 on day 7 p.i. (n = 5). All data points (n) represent individual mice as biological replicates. Exact P-values are shown in each graph. Data in a-i are representative of 2-3 independent experiments. Statistical significance was determined by two-side paired t-test in a and g-I; multiple paired t-test with Holm-Šídák correction was used in c-e.
Extended Data Fig. 7 SATB1 is necessary for differentiating TCM but not TRM cells.
a, Summary of absolute number of sgCtrl (control; orange) and sgSatb1 (SATB1-deficient; blue) P14 cells in spleen on day 35 p.i. with LCMV Armstrong (n = 4). b-c, Representative flow plot and summary showing the percentages of CX3CR1+ (b) and KLRG1+ (c) splenic P14 cells in sgCtrl and sgSat1 on day 35 p.i. (n = 5). d, Representative flow plots displaying the frequencies of sgCtrl and sgSatb1 P14 cells in lymph nodes on day 35 p.i. (n = 5). e, Representative flow plots and summary depicting sgCtrl and sgSatb1 CD62L+ central memory (TCM) and CD62L− effector memory (TEM) cells in lymph nodes on day 35 p.i. (n = 5). f, Representative flow plots and summary showing percentage of TCF-1+ TCM cells in lymph nodes of sgCtrl and sgSatb1. (n = 5). g, Representative flow plots displaying the frequencies of sgCtrl and sgSatb1 P14 cells in intestinal intraepithelial lymphocytes (IEL) on day 35 p.i. h, Representative flow plots and summary showing percentages of sgCtrl and sgSatb1 CD69+ CD103+ resident memory (TRM) cells from IEL on day 35 p.i. (n = 5). All data points (n) represent individual mice as biological replicates. Exact P-values are shown in each graph. Data in a-h are representative of 2-3 independent experiments. Statistical significance was determined by two-side paired t-test in a and a-b and h; multiple paired t-test with Holm-Šídák correction was used in e. ns = not significant.
Extended Data Fig. 8 SATB1 regulates the epigenetic program of stemness in TPRO cells.
P14 cells transduced with sgCtrl and sgSatb1 were adoptively transferred into recipient mice, followed by LCMV Cl13 infection. On day 21, p.i., these P14 cells were sorted and analyzed by ATAC-seq. Four replicates were included in each group. a, Representative flow plots showing sgCtrl or sgSatb1 P14 cells sorting panel (a) and post-sort purity (b). c, Spearman distance analysis using all differentially accessible peaks (DAPs) between indicated populations (FDR ≤ 0.01, lfc≥2). Color indicates distances. d-e, Sequencing tracks of SATB1 ChIP seq (GSE191146), ATAC of TPRO subset (GSE149752), and CUT&TAG of TPRO H3K27ac (GSE149810) at indicated (d) Il7r locus and (e) Tcf7 locus. The differentially accessible peaks between sgCtrl and sgSatb1, illustrated in Fig. 6j-k, are highlighted with a red bar.
Extended Data Fig. 9 SATB1 regulates the quiescence of TPRO in a subset-specific manner.
a-b, Dot plots showing expression of cluster markers. Dot size denotes the number of cells with a particular gene expressed, and intensity of dot color indicates the expression level of RNA (a) and gene accessibility (b). c, Module scores of the top 100 differentially expressed genes from previously identified progenitor, effector, and exhausted CD8+ T cells for all subsets in sgCtrl and sgSatb1. d-e, Coverage plots showing ATAC tracks at Myb (d) and Tnfsf8 (e) loci in sgCtrl and sgSatb1 TPRO cluster, with gene expression levels displayed as violin plots on the right side. TSS represents the transcription start site, grey boxes under the track represent putative enhancers, and links between the enhancers and the promoter are associated with promoter-enhancer interaction. Red bars mark examples of differentially accessible enhancers between sgCtrl and sgSatb1 in the TPRO cluster.
Extended Data Fig. 10 SATB1 plays a role in maintaining the chromatin architecture in TPRO-associated genes.
a, Whole-genome Hi-C contact matrices at 100 kb resolution for wild-type (WT left) and Satb1 knockout (Satb1-KO; right) CD8+ T cells. b, Saddle plots ranked by eigenvector percentiles display chromatin compartmentalization in WT (left), KO (middle) conditions, and the log2 ratio of KO/WT compartmentalization (right). c, a Venn diagram displaying differential and shared topologically associating domains (TADs) between WT and KO at 50 kb resolution. d, Pathway enrichment analysis of genes within WT-specific (top panel) and KO-specific TADs (bottom panel), identified using HOMER-based annotation and ShinyGO. e, Loop pileup of TPRO-specific enhancer sites (N = 2,151) anchored at genome regions in WT (right) and KO (left), visualized at 10 kb resolution. f, Loop pileup of enhancer regions associated with T-cell differentiation (N = 2,670) anchored at genome regions in WT (right) and KO (left), visualized at 10 kb resolution. g-h, Hi-C heatmap maps at 10 kb resolution displaying distance-normalized chromatin interactions in WT (top) and KO (bottom) at the Tcf7 (g) and Myb (h) loci, visualized on Pygenome. The green boxes mark chromatin interactions with changes. ATAC-seq tracks of sgCtrl (orange) and sgSatb1 (blue) CD8+ T cells are shown between Hi-C heatmaps.
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Lin, S., Niu, H., Zhang, Y. et al. SATB1 is a key regulator of quiescence in stem-like CD8+ T cells. Nat Immunol 26, 1737–1751 (2025). https://doi.org/10.1038/s41590-025-02257-w
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DOI: https://doi.org/10.1038/s41590-025-02257-w