Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells
Leukemia stem cells (LSCs) promote the disease and seem resistant to therapy and immune control. Why LSCs are selectively resistant against elimination by CD8+ cytotoxic T cells (CTLs) is still unknown. In this study, we demonstrate that LSCs in chronic myeloid leukemia (CML) can be recognized and k...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Society for Clinical investigation
2021-12-01
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| Series: | JCI Insight |
| Subjects: | |
| Online Access: | https://doi.org/10.1172/jci.insight.151797 |
| _version_ | 1811334822649397248 |
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| author | Magdalena Hinterbrandner Viviana Rubino Carina Stoll Stefan Forster Noah Schnüriger Ramin Radpour Gabriela M. Baerlocher Adrian F. Ochsenbein Carsten Riether |
| author_facet | Magdalena Hinterbrandner Viviana Rubino Carina Stoll Stefan Forster Noah Schnüriger Ramin Radpour Gabriela M. Baerlocher Adrian F. Ochsenbein Carsten Riether |
| author_sort | Magdalena Hinterbrandner |
| collection | DOAJ |
| description | Leukemia stem cells (LSCs) promote the disease and seem resistant to therapy and immune control. Why LSCs are selectively resistant against elimination by CD8+ cytotoxic T cells (CTLs) is still unknown. In this study, we demonstrate that LSCs in chronic myeloid leukemia (CML) can be recognized and killed by CD8+ CTLs in vitro. However, Tregs, which preferentially localized close to CD8+ CTLs in CML BM, protected LSCs from MHC class I–dependent CD8+ CTL–mediated elimination in vivo. BM Tregs in CML were characterized by the selective expression of tumor necrosis factor receptor 4 (Tnfrsf4). Stimulation of Tnfrsf4 signaling did not deplete Tregs but reduced the capacity of Tregs to protect LSCs from CD8+ CTL–mediated killing. In the BM of newly diagnosed CML patients, TNFRSF4 mRNA levels were significantly increased and correlated with the expression of the Treg-restricted transcription factor FOXP3. Overall, these results identify Tregs as key regulators of immune escape of LSCs and TNFRSF4 as a potential target to reduce the function of Tregs and boost antileukemic immunity in CML. |
| first_indexed | 2024-04-13T17:14:52Z |
| format | Article |
| id | doaj.art-aaa5ee6b3a7049b09b48d1e423a16b98 |
| institution | Directory Open Access Journal |
| issn | 2379-3708 |
| language | English |
| last_indexed | 2024-04-13T17:14:52Z |
| publishDate | 2021-12-01 |
| publisher | American Society for Clinical investigation |
| record_format | Article |
| series | JCI Insight |
| spelling | doaj.art-aaa5ee6b3a7049b09b48d1e423a16b982022-12-22T02:38:10ZengAmerican Society for Clinical investigationJCI Insight2379-37082021-12-01623Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cellsMagdalena HinterbrandnerViviana RubinoCarina StollStefan ForsterNoah SchnürigerRamin RadpourGabriela M. BaerlocherAdrian F. OchsenbeinCarsten RietherLeukemia stem cells (LSCs) promote the disease and seem resistant to therapy and immune control. Why LSCs are selectively resistant against elimination by CD8+ cytotoxic T cells (CTLs) is still unknown. In this study, we demonstrate that LSCs in chronic myeloid leukemia (CML) can be recognized and killed by CD8+ CTLs in vitro. However, Tregs, which preferentially localized close to CD8+ CTLs in CML BM, protected LSCs from MHC class I–dependent CD8+ CTL–mediated elimination in vivo. BM Tregs in CML were characterized by the selective expression of tumor necrosis factor receptor 4 (Tnfrsf4). Stimulation of Tnfrsf4 signaling did not deplete Tregs but reduced the capacity of Tregs to protect LSCs from CD8+ CTL–mediated killing. In the BM of newly diagnosed CML patients, TNFRSF4 mRNA levels were significantly increased and correlated with the expression of the Treg-restricted transcription factor FOXP3. Overall, these results identify Tregs as key regulators of immune escape of LSCs and TNFRSF4 as a potential target to reduce the function of Tregs and boost antileukemic immunity in CML.https://doi.org/10.1172/jci.insight.151797HematologyStem cells |
| spellingShingle | Magdalena Hinterbrandner Viviana Rubino Carina Stoll Stefan Forster Noah Schnüriger Ramin Radpour Gabriela M. Baerlocher Adrian F. Ochsenbein Carsten Riether Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells JCI Insight Hematology Stem cells |
| title | Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells |
| title_full | Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells |
| title_fullStr | Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells |
| title_full_unstemmed | Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells |
| title_short | Tnfrsf4-expressing regulatory T cells promote immune escape of chronic myeloid leukemia stem cells |
| title_sort | tnfrsf4 expressing regulatory t cells promote immune escape of chronic myeloid leukemia stem cells |
| topic | Hematology Stem cells |
| url | https://doi.org/10.1172/jci.insight.151797 |
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