LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 15

Search options

  1. Article: NK Cell-Fc Receptors Advance Tumor Immunotherapy.

    Sanseviero, Emilio

    Journal of clinical medicine

    2019  Volume 8, Issue 10

    Abstract: Immunotherapy has revolutionized the treatment of cancer patients. Among immunotherapeutic approaches, antibodies targeting immune checkpoint inhibitors Programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) are ... ...

    Abstract Immunotherapy has revolutionized the treatment of cancer patients. Among immunotherapeutic approaches, antibodies targeting immune checkpoint inhibitors Programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) are approved for treatment of metastatic melanoma and are in clinical trials for a variety of other cancers. The contribution of Natural Killer (NK) cells to the efficacy of immune checkpoint inhibitors is becoming more evident. Enhancing both T and NK cell function in cancer could result in a robust and durable response. Along with the ability to directly kill tumor cells, NK cells can mediate antibody-dependent cellular cytotoxicity (ADCC) given the expression of Fragment Crystallizable (Fc) receptors. Promising novel antibodies modified with improved Fc-receptor-mediated functions or Fc-engagers to kill target cells have been tested in pre-clinical models with considerable results. Combination therapies with immune-therapeutic antibodies with enhancers of NK-cell Fc-receptor-mediated function can be exploited to increase the efficacy of these antibodies. Herein, I discuss possible strategies to improve the success of immunotherapy by boosting NK cell function.
    Language English
    Publishing date 2019-10-12
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm8101667
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Myeloid-derived suppressor cells in the era of increasing myeloid cell diversity.

    Veglia, Filippo / Sanseviero, Emilio / Gabrilovich, Dmitry I

    Nature reviews. Immunology

    2021  Volume 21, Issue 8, Page(s) 485–498

    Abstract: Myeloid-derived suppressor cells (MDSCs) are pathologically activated neutrophils and monocytes with potent immunosuppressive activity. They are implicated in the regulation of immune responses in many pathological conditions and are closely associated ... ...

    Abstract Myeloid-derived suppressor cells (MDSCs) are pathologically activated neutrophils and monocytes with potent immunosuppressive activity. They are implicated in the regulation of immune responses in many pathological conditions and are closely associated with poor clinical outcomes in cancer. Recent studies have indicated key distinctions between MDSCs and classical neutrophils and monocytes, and, in this Review, we discuss new data on the major genomic and metabolic characteristics of MDSCs. We explain how these characteristics shape MDSC function and could facilitate therapeutic targeting of these cells, particularly in cancer and in autoimmune diseases. Additionally, we briefly discuss emerging data on MDSC involvement in pregnancy, neonatal biology and COVID-19.
    MeSH term(s) Autoimmune Diseases/immunology ; Autoimmune Diseases/metabolism ; COVID-19/immunology ; COVID-19/prevention & control ; COVID-19/virology ; Cytokines/immunology ; Cytokines/metabolism ; Humans ; Monocytes/immunology ; Monocytes/metabolism ; Myeloid Cells/immunology ; Myeloid Cells/metabolism ; Myeloid-Derived Suppressor Cells/immunology ; Myeloid-Derived Suppressor Cells/metabolism ; Neoplasms/immunology ; Neoplasms/metabolism ; Neutrophils/immunology ; Neutrophils/metabolism ; SARS-CoV-2/immunology ; SARS-CoV-2/physiology
    Chemical Substances Cytokines
    Language English
    Publishing date 2021-02-01
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2062776-2
    ISSN 1474-1741 ; 1474-1733
    ISSN (online) 1474-1741
    ISSN 1474-1733
    DOI 10.1038/s41577-020-00490-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Isolation and Phenotyping of Splenic Myeloid-Derived Suppressor Cells in Murine Cancer Models.

    Sanseviero, Emilio / Kim, Rina / Gabrilovich, Dmitry I

    Methods in molecular biology (Clifton, N.J.)

    2020  Volume 2236, Page(s) 19–28

    Abstract: Myeloid-derived suppressor cells (MDSC) are immunosuppressive myeloid cells that accumulate in tumor sites and peripheral lymphoid organs such as the spleen. In murine cancer models, the spleen is a major reservoir for MDSC, representing an easily ... ...

    Abstract Myeloid-derived suppressor cells (MDSC) are immunosuppressive myeloid cells that accumulate in tumor sites and peripheral lymphoid organs such as the spleen. In murine cancer models, the spleen is a major reservoir for MDSC, representing an easily accessible tissue from which to isolate high numbers of these cell population for downstream applications. Here we describe an efficient method to phenotype as well as to isolate and assess the functionality of murine splenic MDSC.
    MeSH term(s) Animals ; Cell Separation/methods ; Disease Models, Animal ; Immunophenotyping/methods ; Mice ; Monocytes/pathology ; Myeloid-Derived Suppressor Cells/pathology ; Neoplasms/pathology ; Neutrophils/pathology ; Phenotype ; Spleen/pathology
    Language English
    Publishing date 2020-11-25
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-1060-2_3
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Myeloid-Derived Suppressor Cells: A Propitious Road to Clinic.

    Grover, Amit / Sanseviero, Emilio / Timosenko, Elina / Gabrilovich, Dmitry I

    Cancer discovery

    2021  Volume 11, Issue 11, Page(s) 2693–2706

    Abstract: Myeloid-derived suppressor cells (MDSC) are important regulators of immune responses in cancer. They represent a relatively stable form of pathologic activation of neutrophils and monocytes and are characterized by distinct transcriptional, biochemical, ... ...

    Abstract Myeloid-derived suppressor cells (MDSC) are important regulators of immune responses in cancer. They represent a relatively stable form of pathologic activation of neutrophils and monocytes and are characterized by distinct transcriptional, biochemical, functional, and phenotypical features. The close association of MDSCs with clinical outcomes in cancer suggests that these cells can be an attractive target for therapeutic intervention. However, the complex nature of MDSC biology represents a substantial challenge for the development of selective therapies. Here, we discuss the mechanisms regulating MDSC development and fate and recent research advances that have demonstrated opportunities for therapeutic regulation of these cells. SIGNIFICANCE: MDSCs are attractive therapeutic targets because of their close association with negative clinical outcomes in cancer and established biology as potent immunosuppressive cells. However, the complex nature of MDSC biology presents a substantial challenge for therapeutic targeting. In this review, we discuss those challenges and possible solutions.
    MeSH term(s) Humans ; Monocytes ; Myeloid-Derived Suppressor Cells ; Neoplasms ; Neutrophils
    Language English
    Publishing date 2021-10-11
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2625242-9
    ISSN 2159-8290 ; 2159-8274
    ISSN (online) 2159-8290
    ISSN 2159-8274
    DOI 10.1158/2159-8290.CD-21-0764
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Syntaphilin Regulates Neutrophil Migration in Cancer.

    Fu, Shuyu / Deng, Hui / Bertolini, Irene / Perego, Michela / Chen, Eric S / Sanseviero, Emilio / Mostafa, Ali / Alicea-Torres, Kevin / Garcia-Gerique, Laura / Stone, Erica L / Kossenkov, Andrew V / Schug, Zachary T / Nam, Brian / Mulligan, Charles / Altieri, Dario C / Nefedova, Yulia / Gabrilovich, Dmitry I

    Cancer immunology research

    2022  Volume 11, Issue 3, Page(s) 278–289

    Abstract: Pathologically activated neutrophils (PMN) with immunosuppressive activity, which are termed myeloid-derived suppressor cells (PMN-MDSC), play a critical role in regulating tumor progression. These cells have been implicated in promoting tumor metastases ...

    Abstract Pathologically activated neutrophils (PMN) with immunosuppressive activity, which are termed myeloid-derived suppressor cells (PMN-MDSC), play a critical role in regulating tumor progression. These cells have been implicated in promoting tumor metastases by contributing to premetastatic niche formation. This effect was facilitated by enhanced spontaneous migration of PMN from bone marrow to the premetastatic niches during the early-stage of cancer development. The molecular mechanisms underpinning this phenomenon remained unclear. In this study, we found that syntaphilin (SNPH), a cytoskeletal protein previously known for anchoring mitochondria to the microtubule in neurons and tumor cells, could regulate migration of PMN. Expression of SNPH was decreased in PMN from tumor-bearing mice and patients with cancer as compared with PMN from tumor-free mice and healthy donors, respectively. In Snph-knockout (SNPH-KO) mice, spontaneous migration of PMN was increased and the mice showed increased metastasis. Mechanistically, in SNPH-KO mice, the speed and distance travelled by mitochondria in PMN was increased, rates of oxidative phosphorylation and glycolysis were elevated, and generation of adenosine was increased. Thus, our study reveals a molecular mechanism regulating increased migratory activity of PMN during cancer progression and suggests a novel therapeutic targeting opportunity.
    MeSH term(s) Animals ; Mice ; Cell Movement ; Membrane Proteins/metabolism ; Myeloid-Derived Suppressor Cells/metabolism ; Neoplasms/pathology ; Nerve Tissue Proteins ; Neutrophils/metabolism
    Chemical Substances Membrane Proteins ; Nerve Tissue Proteins ; Snph protein, mouse
    Language English
    Publishing date 2022-11-11
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2732489-8
    ISSN 2326-6074 ; 2326-6066
    ISSN (online) 2326-6074
    ISSN 2326-6066
    DOI 10.1158/2326-6066.CIR-22-0035
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: The ATR inhibitor ceralasertib potentiates cancer checkpoint immunotherapy by regulating the tumor microenvironment.

    Hardaker, Elizabeth L / Sanseviero, Emilio / Karmokar, Ankur / Taylor, Devon / Milo, Marta / Michaloglou, Chrysis / Hughes, Adina / Mai, Mimi / King, Matthew / Solanki, Anisha / Magiera, Lukasz / Miragaia, Ricardo / Kar, Gozde / Standifer, Nathan / Surace, Michael / Gill, Shaan / Peter, Alison / Talbot, Sara / Tohumeken, Sehmus /
    Fryer, Henderson / Mostafa, Ali / Mulgrew, Kathy / Lam, Carolyn / Hoffmann, Scott / Sutton, Daniel / Carnevalli, Larissa / Calero-Nieto, Fernando J / Jones, Gemma N / Pierce, Andrew J / Wilson, Zena / Campbell, David / Nyoni, Lynet / Martins, Carla P / Baker, Tamara / Serrano de Almeida, Gilberto / Ramlaoui, Zainab / Bidar, Abdel / Phillips, Benjamin / Boland, Joseph / Iyer, Sonia / Barrett, J Carl / Loembé, Arsene-Bienvenu / Fuchs, Serge Y / Duvvuri, Umamaheswar / Lou, Pei-Jen / Nance, Melonie A / Gomez Roca, Carlos Alberto / Cadogan, Elaine / Critichlow, Susan E / Fawell, Steven / Cobbold, Mark / Dean, Emma / Valge-Archer, Viia / Lau, Alan / Gabrilovich, Dmitry I / Barry, Simon T

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 1700

    Abstract: The Ataxia telangiectasia and Rad3-related (ATR) inhibitor ceralasertib in combination with the PD-L1 antibody durvalumab demonstrated encouraging clinical benefit in melanoma and lung cancer patients who progressed on immunotherapy. Here we show that ... ...

    Abstract The Ataxia telangiectasia and Rad3-related (ATR) inhibitor ceralasertib in combination with the PD-L1 antibody durvalumab demonstrated encouraging clinical benefit in melanoma and lung cancer patients who progressed on immunotherapy. Here we show that modelling of intermittent ceralasertib treatment in mouse tumor models reveals CD8
    MeSH term(s) Humans ; Animals ; Mice ; CD8-Positive T-Lymphocytes ; B7-H1 Antigen ; Tumor Microenvironment ; Cell Line, Tumor ; Immunotherapy ; Disease Models, Animal ; Neoplasms ; Ataxia Telangiectasia Mutated Proteins ; Indoles ; Morpholines ; Pyrimidines ; Sulfonamides
    Chemical Substances ceralasertib (85RE35306Z) ; B7-H1 Antigen ; ATR protein, human (EC 2.7.11.1) ; Ataxia Telangiectasia Mutated Proteins (EC 2.7.11.1) ; Indoles ; Morpholines ; Pyrimidines ; Sulfonamides
    Language English
    Publishing date 2024-02-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-45996-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Myeloid-Derived Suppressor Cells Are a Major Source of Wnt5A in the Melanoma Microenvironment and Depend on Wnt5A for Full Suppressive Activity.

    Douglass, Stephen M / Fane, Mitchell E / Sanseviero, Emilio / Ecker, Brett L / Kugel, Curtis H / Behera, Reeti / Kumar, Vinit / Tcyganov, Evgenii N / Yin, Xiangfan / Liu, Qin / Chhabra, Yash / Alicea, Gretchen M / Kuruvilla, Rejji / Gabrilovich, Dmitry I / Weeraratna, Ashani T

    Cancer research

    2020  Volume 81, Issue 3, Page(s) 658–670

    Abstract: Metastatic dissemination remains a significant barrier to successful therapy for melanoma. Wnt5A is a potent driver of invasion in melanoma and is believed to be secreted from the tumor microenvironment (TME). Our data suggest that myeloid-derived ... ...

    Abstract Metastatic dissemination remains a significant barrier to successful therapy for melanoma. Wnt5A is a potent driver of invasion in melanoma and is believed to be secreted from the tumor microenvironment (TME). Our data suggest that myeloid-derived suppressor cells (MDSC) in the TME are a major source of Wnt5A and are reliant upon Wnt5A for multiple actions. Knockdown of Wnt5A specifically in the myeloid cells demonstrated a clear decrease in Wnt5A expression within the TME
    MeSH term(s) Animals ; Antigens, CD/metabolism ; Arginase/metabolism ; Cell Line, Tumor ; Female ; Lung Neoplasms/secondary ; Lymphocytes, Tumor-Infiltrating/metabolism ; Male ; Melanoma/metabolism ; Melanoma/secondary ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Myeloid-Derived Suppressor Cells/immunology ; Myeloid-Derived Suppressor Cells/metabolism ; Neoplasm Invasiveness ; Programmed Cell Death 1 Receptor/metabolism ; T-Lymphocytes, Regulatory/metabolism ; Transforming Growth Factor beta1/metabolism ; Tumor Microenvironment ; Wnt-5a Protein/metabolism
    Chemical Substances Antigens, CD ; CD223 antigen ; PDCD1 protein, human ; Programmed Cell Death 1 Receptor ; Transforming Growth Factor beta1 ; Wnt-5a Protein ; Wnt5a protein, mouse ; Arginase (EC 3.5.3.1)
    Language English
    Publishing date 2020-12-01
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1432-1
    ISSN 1538-7445 ; 0008-5472
    ISSN (online) 1538-7445
    ISSN 0008-5472
    DOI 10.1158/0008-5472.CAN-20-1238
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Immune suppressive activity of myeloid-derived suppressor cells in cancer requires inactivation of the type I interferon pathway.

    Alicea-Torres, Kevin / Sanseviero, Emilio / Gui, Jun / Chen, Jinyun / Veglia, Filippo / Yu, Qiujin / Donthireddy, Laxminarasimha / Kossenkov, Andrew / Lin, Cindy / Fu, Shuyu / Mulligan, Charles / Nam, Brian / Masters, Gregory / Denstman, Fred / Bennett, Joseph / Hockstein, Neil / Rynda-Apple, Agnieszka / Nefedova, Yulia / Fuchs, Serge Y /
    Gabrilovich, Dmitry I

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 1717

    Abstract: Myeloid-derived suppressor cells (MDSC) are pathologically activated neutrophils and monocytes with potent immune suppressive activity. These cells play an important role in accelerating tumor progression and undermining the efficacy of anti-cancer ... ...

    Abstract Myeloid-derived suppressor cells (MDSC) are pathologically activated neutrophils and monocytes with potent immune suppressive activity. These cells play an important role in accelerating tumor progression and undermining the efficacy of anti-cancer therapies. The natural mechanisms limiting MDSC activity are not well understood. Here, we present evidence that type I interferons (IFN1) receptor signaling serves as a universal mechanism that restricts acquisition of suppressive activity by these cells. Downregulation of the IFNAR1 chain of this receptor is found in MDSC from cancer patients and mouse tumor models. The decrease in IFNAR1 depends on the activation of the p38 protein kinase and is required for activation of the immune suppressive phenotype. Whereas deletion of IFNAR1 is not sufficient to convert neutrophils and monocytes to MDSC, genetic stabilization of IFNAR1 in tumor bearing mice undermines suppressive activity of MDSC and has potent antitumor effect. Stabilizing IFNAR1 using inhibitor of p38 combined with the interferon induction therapy elicits a robust anti-tumor effect. Thus, negative regulatory mechanisms of MDSC function can be exploited therapeutically.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Animals ; Antineoplastic Agents/pharmacology ; Bone Marrow ; Cell Line, Tumor ; Disease Models, Animal ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; Interferon Type I/metabolism ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Knockout ; Middle Aged ; Monocytes/immunology ; Myeloid-Derived Suppressor Cells/immunology ; Neoplasms/metabolism ; Neutrophils/immunology ; Receptor, Interferon alpha-beta/genetics ; Receptor, Interferon alpha-beta/metabolism ; p38 Mitogen-Activated Protein Kinases/drug effects ; p38 Mitogen-Activated Protein Kinases/metabolism
    Chemical Substances Antineoplastic Agents ; IFNAR1 protein, human ; Ifnar1 protein, mouse ; Interferon Type I ; Receptor, Interferon alpha-beta (156986-95-7) ; p38 Mitogen-Activated Protein Kinases (EC 2.7.11.24)
    Language English
    Publishing date 2021-03-19
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-22033-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Analysis of classical neutrophils and polymorphonuclear myeloid-derived suppressor cells in cancer patients and tumor-bearing mice.

    Veglia, Filippo / Hashimoto, Ayumi / Dweep, Harsh / Sanseviero, Emilio / De Leo, Alessandra / Tcyganov, Evgenii / Kossenkov, Andrew / Mulligan, Charles / Nam, Brian / Masters, Gregory / Patel, Jaymala / Bhargava, Vipul / Wilkinson, Patrick / Smirnov, Denis / Sepulveda, Manuel A / Singhal, Sunil / Eruslanov, Evgeniy B / Cristescu, Razvan / Loboda, Andrey /
    Nefedova, Yulia / Gabrilovich, Dmitry I

    The Journal of experimental medicine

    2021  Volume 218, Issue 4

    Abstract: In this study, using single-cell RNA-seq, cell mass spectrometry, flow cytometry, and functional analysis, we characterized the heterogeneity of polymorphonuclear neutrophils (PMNs) in cancer. We describe three populations of PMNs in tumor-bearing mice: ... ...

    Abstract In this study, using single-cell RNA-seq, cell mass spectrometry, flow cytometry, and functional analysis, we characterized the heterogeneity of polymorphonuclear neutrophils (PMNs) in cancer. We describe three populations of PMNs in tumor-bearing mice: classical PMNs, polymorphonuclear myeloid-derived suppressor cells (PMN-MDSCs), and activated PMN-MDSCs with potent immune suppressive activity. In spleens of mice, PMN-MDSCs gradually replaced PMNs during tumor progression. Activated PMN-MDSCs were found only in tumors, where they were present at the very early stages of the disease. These populations of PMNs in mice could be separated based on the expression of CD14. In peripheral blood of cancer patients, we identified two distinct populations of PMNs with characteristics of classical PMNs and PMN-MDSCs. The gene signature of tumor PMN-MDSCs was similar to that in mouse activated PMN-MDSCs and was closely associated with negative clinical outcome in cancer patients. Thus, we provide evidence that PMN-MDSCs are a distinct population of PMNs with unique features and potential for selective targeting opportunities.
    MeSH term(s) Animals ; Carcinoma, Lewis Lung/immunology ; Carcinoma, Lewis Lung/pathology ; Carcinoma, Non-Small-Cell Lung/blood ; Carcinoma, Non-Small-Cell Lung/immunology ; Case-Control Studies ; Cell Line, Tumor ; Disease Models, Animal ; Female ; Humans ; Lung Neoplasms/blood ; Lung Neoplasms/immunology ; Lymphoma/immunology ; Lymphoma/pathology ; Mice ; Mice, Inbred C57BL ; Neutrophils/classification ; Neutrophils/immunology ; RNA-Seq ; Single-Cell Analysis ; Transcriptome
    Language English
    Publishing date 2021-02-10
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 218343-2
    ISSN 1540-9538 ; 0022-1007
    ISSN (online) 1540-9538
    ISSN 0022-1007
    DOI 10.1084/jem.20201803
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Peroxynitrite in the tumor microenvironment changes the profile of antigens allowing escape from cancer immunotherapy.

    Tcyganov, Evgenii N / Sanseviero, Emilio / Marvel, Douglas / Beer, Thomas / Tang, Hsin-Yao / Hembach, Peter / Speicher, David W / Zhang, Qianfei / Donthireddy, Laxminarasimha R / Mostafa, Ali / Tsyganova, Sabina / Pisarev, Vladimir / Laufer, Terri / Ignatov, Dmitriy / Ferrone, Soldano / Meyer, Christiane / Maby-El Hajjami, Hélène / Speiser, Daniel E / Altiok, Sooner /
    Antonia, Scott / Xu, Xiaowei / Xu, Wei / Zheng, Cathy / Schuchter, Lynn M / Amaravadi, Ravi K / Mitchell, Tara C / Karakousis, Giorgos C / Yuan, Zhe / Montaner, Luis J / Celis, Esteban / Gabrilovich, Dmitry I

    Cancer cell

    2022  Volume 40, Issue 10, Page(s) 1173–1189.e6

    Abstract: Cancer immunotherapy often depends on recognition of peptide epitopes by cytotoxic T lymphocytes (CTLs). The tumor microenvironment (TME) is enriched for peroxynitrite (PNT), a potent oxidant produced by infiltrating myeloid cells and some tumor cells. ... ...

    Abstract Cancer immunotherapy often depends on recognition of peptide epitopes by cytotoxic T lymphocytes (CTLs). The tumor microenvironment (TME) is enriched for peroxynitrite (PNT), a potent oxidant produced by infiltrating myeloid cells and some tumor cells. We demonstrate that PNT alters the profile of MHC class I bound peptides presented on tumor cells. Only CTLs specific for PNT-resistant peptides have a strong antitumor effect in vivo, whereas CTLs specific for PNT-sensitive peptides are not effective. Therapeutic targeting of PNT in mice reduces resistance of tumor cells to CTLs. Melanoma patients with low PNT activity in their tumors demonstrate a better clinical response to immunotherapy than patients with high PNT activity. Our data suggest that intratumoral PNT activity should be considered for the design of neoantigen-based therapy and also may be an important immunotherapeutic target.
    MeSH term(s) Animals ; Antigens, Neoplasm/metabolism ; Epitopes ; Histocompatibility Antigens Class I/metabolism ; Immunotherapy ; Melanoma/metabolism ; Mice ; Oxidants/metabolism ; Peptides ; Peroxynitrous Acid/metabolism ; T-Lymphocytes, Cytotoxic ; Tumor Microenvironment
    Chemical Substances Antigens, Neoplasm ; Epitopes ; Histocompatibility Antigens Class I ; Oxidants ; Peptides ; Peroxynitrous Acid (14691-52-2)
    Language English
    Publishing date 2022-10-12
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2078448-X
    ISSN 1878-3686 ; 1535-6108
    ISSN (online) 1878-3686
    ISSN 1535-6108
    DOI 10.1016/j.ccell.2022.09.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top