author_facet Stary, Georg
Bangert, Christine
Tauber, Martina
Strohal, Robert
Kopp, Tamara
Stingl, Georg
Stary, Georg
Bangert, Christine
Tauber, Martina
Strohal, Robert
Kopp, Tamara
Stingl, Georg
author Stary, Georg
Bangert, Christine
Tauber, Martina
Strohal, Robert
Kopp, Tamara
Stingl, Georg
spellingShingle Stary, Georg
Bangert, Christine
Tauber, Martina
Strohal, Robert
Kopp, Tamara
Stingl, Georg
The Journal of Experimental Medicine
Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
Immunology
Immunology and Allergy
author_sort stary, georg
spelling Stary, Georg Bangert, Christine Tauber, Martina Strohal, Robert Kopp, Tamara Stingl, Georg 1540-9538 0022-1007 Rockefeller University Press Immunology Immunology and Allergy http://dx.doi.org/10.1084/jem.20070021 <jats:p>Imiquimod (IMQ), a synthetic agonist to Toll-like receptor (TLR) 7, is being successfully used for the treatment of certain skin neoplasms, but the exact mechanisms by which this compound induces tumor regression are not yet understood. While treating basal cell carcinoma (BCC) patients with topical IMQ, we detected, by immunohistochemistry, sizable numbers of both myeloid dendritic cells (mDCs) and plasmacytoid DCs (pDCs) within the inflammatory infiltrate. Surprisingly, peritumoral mDCs stained positive for perforin and granzyme B, whereas infiltrating pDCs expressed tumor necrosis factor–related apoptosis-inducing ligand (TRAIL). The biological relevance of this observation can be deduced from our further findings that peripheral blood–derived CD11c+ mDCs acquired antiperforin and anti–granzyme B reactivity upon TLR7/8 stimulation and could use these molecules to effectively lyse major histocompatibility complex (MHC) class Ilo cancer cell lines. The same activation protocol led pDCs to kill MHC class I–bearing Jurkat cells in a TRAIL-dependent fashion. While suggesting that mDCs and pDCs are directly involved in the IMQ-induced destruction of BCC lesions, our data also add a new facet to the functional spectrum of DCs, ascribing to them a major role not only in the initiation but also in the effector phase of the immune response.</jats:p> Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells The Journal of Experimental Medicine
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series The Journal of Experimental Medicine
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title Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_unstemmed Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_full Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_fullStr Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_full_unstemmed Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_short Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_sort tumoricidal activity of tlr7/8-activated inflammatory dendritic cells
topic Immunology
Immunology and Allergy
url http://dx.doi.org/10.1084/jem.20070021
publishDate 2007
physical 1441-1451
description <jats:p>Imiquimod (IMQ), a synthetic agonist to Toll-like receptor (TLR) 7, is being successfully used for the treatment of certain skin neoplasms, but the exact mechanisms by which this compound induces tumor regression are not yet understood. While treating basal cell carcinoma (BCC) patients with topical IMQ, we detected, by immunohistochemistry, sizable numbers of both myeloid dendritic cells (mDCs) and plasmacytoid DCs (pDCs) within the inflammatory infiltrate. Surprisingly, peritumoral mDCs stained positive for perforin and granzyme B, whereas infiltrating pDCs expressed tumor necrosis factor–related apoptosis-inducing ligand (TRAIL). The biological relevance of this observation can be deduced from our further findings that peripheral blood–derived CD11c+ mDCs acquired antiperforin and anti–granzyme B reactivity upon TLR7/8 stimulation and could use these molecules to effectively lyse major histocompatibility complex (MHC) class Ilo cancer cell lines. The same activation protocol led pDCs to kill MHC class I–bearing Jurkat cells in a TRAIL-dependent fashion. While suggesting that mDCs and pDCs are directly involved in the IMQ-induced destruction of BCC lesions, our data also add a new facet to the functional spectrum of DCs, ascribing to them a major role not only in the initiation but also in the effector phase of the immune response.</jats:p>
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author Stary, Georg, Bangert, Christine, Tauber, Martina, Strohal, Robert, Kopp, Tamara, Stingl, Georg
author_facet Stary, Georg, Bangert, Christine, Tauber, Martina, Strohal, Robert, Kopp, Tamara, Stingl, Georg, Stary, Georg, Bangert, Christine, Tauber, Martina, Strohal, Robert, Kopp, Tamara, Stingl, Georg
author_sort stary, georg
container_issue 6
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container_title The Journal of Experimental Medicine
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description <jats:p>Imiquimod (IMQ), a synthetic agonist to Toll-like receptor (TLR) 7, is being successfully used for the treatment of certain skin neoplasms, but the exact mechanisms by which this compound induces tumor regression are not yet understood. While treating basal cell carcinoma (BCC) patients with topical IMQ, we detected, by immunohistochemistry, sizable numbers of both myeloid dendritic cells (mDCs) and plasmacytoid DCs (pDCs) within the inflammatory infiltrate. Surprisingly, peritumoral mDCs stained positive for perforin and granzyme B, whereas infiltrating pDCs expressed tumor necrosis factor–related apoptosis-inducing ligand (TRAIL). The biological relevance of this observation can be deduced from our further findings that peripheral blood–derived CD11c+ mDCs acquired antiperforin and anti–granzyme B reactivity upon TLR7/8 stimulation and could use these molecules to effectively lyse major histocompatibility complex (MHC) class Ilo cancer cell lines. The same activation protocol led pDCs to kill MHC class I–bearing Jurkat cells in a TRAIL-dependent fashion. While suggesting that mDCs and pDCs are directly involved in the IMQ-induced destruction of BCC lesions, our data also add a new facet to the functional spectrum of DCs, ascribing to them a major role not only in the initiation but also in the effector phase of the immune response.</jats:p>
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spelling Stary, Georg Bangert, Christine Tauber, Martina Strohal, Robert Kopp, Tamara Stingl, Georg 1540-9538 0022-1007 Rockefeller University Press Immunology Immunology and Allergy http://dx.doi.org/10.1084/jem.20070021 <jats:p>Imiquimod (IMQ), a synthetic agonist to Toll-like receptor (TLR) 7, is being successfully used for the treatment of certain skin neoplasms, but the exact mechanisms by which this compound induces tumor regression are not yet understood. While treating basal cell carcinoma (BCC) patients with topical IMQ, we detected, by immunohistochemistry, sizable numbers of both myeloid dendritic cells (mDCs) and plasmacytoid DCs (pDCs) within the inflammatory infiltrate. Surprisingly, peritumoral mDCs stained positive for perforin and granzyme B, whereas infiltrating pDCs expressed tumor necrosis factor–related apoptosis-inducing ligand (TRAIL). The biological relevance of this observation can be deduced from our further findings that peripheral blood–derived CD11c+ mDCs acquired antiperforin and anti–granzyme B reactivity upon TLR7/8 stimulation and could use these molecules to effectively lyse major histocompatibility complex (MHC) class Ilo cancer cell lines. The same activation protocol led pDCs to kill MHC class I–bearing Jurkat cells in a TRAIL-dependent fashion. While suggesting that mDCs and pDCs are directly involved in the IMQ-induced destruction of BCC lesions, our data also add a new facet to the functional spectrum of DCs, ascribing to them a major role not only in the initiation but also in the effector phase of the immune response.</jats:p> Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells The Journal of Experimental Medicine
spellingShingle Stary, Georg, Bangert, Christine, Tauber, Martina, Strohal, Robert, Kopp, Tamara, Stingl, Georg, The Journal of Experimental Medicine, Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells, Immunology, Immunology and Allergy
title Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_full Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_fullStr Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_full_unstemmed Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_short Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
title_sort tumoricidal activity of tlr7/8-activated inflammatory dendritic cells
title_unstemmed Tumoricidal activity of TLR7/8-activated inflammatory dendritic cells
topic Immunology, Immunology and Allergy
url http://dx.doi.org/10.1084/jem.20070021