Senescence-associated secretory proteins induced in lung adenocarcinoma by extended treatment with dexamethasone enhance migration and activation of lymphocytes
© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature..
There is a need to improve response rates of immunotherapies in lung adenocarcinoma (AC). Extended (7-14 days) treatment of high glucocorticoid receptor (GR) expressing lung AC cells with dexamethasone (Dex) induces an irreversible senescence phenotype through chronic induction of p27. As the senescence-associated secretory phenotype (SASP) may have either tumor supporting or antitumor immunomodulatory effects, it was interest to examine the effects of Dex-induced senescence of lung AC cells on immune cells. Dex-induced senescence resulted in sustained production of CCL2, CCL4, CXCL1 and CXCL2, both in vitro and in vivo. After Dex withdrawal, secretion of these chemokines by the senescent cells attracted peripheral blood monocytes, T-cells, and NK cells. Following treatment with Dex-induced SASP protein(s), the peripheral blood lymphocytes exhibited higher cell count and tumor cytolytic activity along with enhanced Ki67 and perforin expression in T and NK cells. This cytolytic activity was partially attributed to NKG2D, which was upregulated in NK cells by SASP while its ligand MICA/B was upregulated in the senescent cells. Enhanced infiltrations of T and NK cells were observed in human lung AC xenografts in humanized NSG mice, following treatment with Dex. The findings substantiate the idea that induction of irreversible senescence in high-GR expressing subpopulations of lung AC tumors using Dex pretreatment enhances tumor immune infiltration and may subsequently improve the clinical outcome of current immunotherapies.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:72 |
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| Enthalten in: |
Cancer immunology, immunotherapy : CII - 72(2023), 5 vom: 23. Mai, Seite 1273-1284 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Parajuli, Prahlad [VerfasserIn] |
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| Links: |
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| Themen: |
7S5I7G3JQL |
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| Anmerkungen: |
Date Completed 19.04.2023 Date Revised 26.04.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1007/s00262-022-03332-z |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
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| 520 | |a There is a need to improve response rates of immunotherapies in lung adenocarcinoma (AC). Extended (7-14 days) treatment of high glucocorticoid receptor (GR) expressing lung AC cells with dexamethasone (Dex) induces an irreversible senescence phenotype through chronic induction of p27. As the senescence-associated secretory phenotype (SASP) may have either tumor supporting or antitumor immunomodulatory effects, it was interest to examine the effects of Dex-induced senescence of lung AC cells on immune cells. Dex-induced senescence resulted in sustained production of CCL2, CCL4, CXCL1 and CXCL2, both in vitro and in vivo. After Dex withdrawal, secretion of these chemokines by the senescent cells attracted peripheral blood monocytes, T-cells, and NK cells. Following treatment with Dex-induced SASP protein(s), the peripheral blood lymphocytes exhibited higher cell count and tumor cytolytic activity along with enhanced Ki67 and perforin expression in T and NK cells. This cytolytic activity was partially attributed to NKG2D, which was upregulated in NK cells by SASP while its ligand MICA/B was upregulated in the senescent cells. Enhanced infiltrations of T and NK cells were observed in human lung AC xenografts in humanized NSG mice, following treatment with Dex. The findings substantiate the idea that induction of irreversible senescence in high-GR expressing subpopulations of lung AC tumors using Dex pretreatment enhances tumor immune infiltration and may subsequently improve the clinical outcome of current immunotherapies | ||
| 650 | 4 | |a Journal Article | |
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