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5 results on '"Elodie Lauret Marie Joseph"'

1. Immunoregulation and Clinical Implications of ANGPT2/TIE2+ M-MDSC Signature in Non–Small Cell Lung Cancer

Author

Caroline Laheurte, Laura Boullerot, Olivier Adotevi, L. Rangan, Magalie Dosset, Elodie Lauret Marie Joseph, Marine Jary, Adeline Bouard, Eléonore Gravelin, Christophe Borg, and Kamal Asgarov

Subjects
0301 basic medicine, Cancer Research, business.industry, medicine.medical_treatment, Immunology, Immunosuppression, Immunotherapy, medicine.disease, Immune tolerance, 03 medical and health sciences, 030104 developmental biology, 0302 clinical medicine, Immune system, Antigen, Cancer immunotherapy, 030220 oncology & carcinogenesis, cardiovascular system, medicine, Cancer research, Carcinoma, Lung cancer, business
Abstract

Myeloid-derived suppressor cells (MDSC) promote immunosuppression and are a target in the field of immuno-oncology. Accumulation of MDSCs is associated with poor prognosis and resistance to immunotherapy for several cancers. Here, we describe an accumulation of a subset of circulating monocytic MDSCs (M-MDSC) overexpressing TIE2, the receptor for angiopoietin-2 (ANGPT2), in patients with non–small cell lung cancer (NSCLC). Greater numbers of circulating TIE2+ M-MDSCs were detected in patients with NSCLC compared with healthy subjects, and this accumulation correlated with ANGPT2 concentration in blood. The presence of an ANGPT2-rich environment was associated with impairment of preexisting T-cell responses against tumor-associated antigens (TAA) in patients with NSCLC. We demonstrated that ANGPT2 sensitizes TIE2+ M-MDSCs such that these cells suppress TAA-specific T cells. In patients with NSCLC, upregulation of the ANGPT2/TIE2+ M-MDSC signature in blood was associated with a poor prognosis. Our results identify the ANGPT2/TIE2+ M-MDSC axis as a participant in tumor immune evasion that should be taken into account in future cancer immunotherapy.

Published
2020
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2. Rapalog combined with CCR4 antagonist improves anticancer vaccines efficacy

Author

Patrice Ravel, Elodie Lauret Marie-Joseph, Laura Boullerot, Laura Mansi, Laurent Beziaud, Ludger Johannes, Olivier Adotevi, Thi Tran, Jagadeesh Bayry, and Eric Tartour

Subjects
0301 basic medicine, Cancer Research, business.industry, Melanoma, Cancer, medicine.disease, Temsirolimus, 3. Good health, Vaccination, 03 medical and health sciences, 030104 developmental biology, 0302 clinical medicine, Oncology, 030220 oncology & carcinogenesis, medicine, Cancer research, Cytotoxic T cell, business, Interleukin-7 receptor, PI3K/AKT/mTOR pathway, CD8, medicine.drug
Abstract

mTOR pathway inhibitors such as rapalogs represent a promising tool to induce functional memory CD8 T cells. In our study, we investigated the combination of temsirolimus with anticancer vaccines. Using various designs of cancer vaccines (short and long peptides or the B subunit of Shiga toxin as an antigen delivery vector) and tumor models (melanoma, lung and colon cancer), we showed that the administration of temsirolimus efficiently decreased tumor growth and enhanced tumor-specific CD8 T-cell responses induced by vaccination. Furthermore, tumor-specific CD8 T cells induced by the bi-therapy (vaccine + temsirolimus) exhibit phenotypic characteristics of central memory (CD127+ CD62L+ ) CD8 T cells compared to vaccination alone. We demonstrated that regulatory CD4 T cells (Tregs ) expansion in vivo limits the efficacy of the bi-therapy by altering the antitumor CD8 T-cell responses. Finally, the use of a small molecule CCR4 antagonist to prevent Tregs induction considerably improved the efficacy of the bi-therapy by enhancing CD8 T cells-mediated antitumor immunity. Taken together, our study highlights the potential interest of combining cancer vaccines with drugs that promote memory CD8 T cells and inhibit Tregs .

Published
2018
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3. Identification of a novel PD-L1 positive solid tumor transplantable in HLA-A*0201/DRB1*0101 transgenic mice

Author

Elodie Lauret Marie Joseph, Séverine Valmary-Degano, Romain Boidot, Jean-René Pallandre, Olivier Adotevi, Yann Godet, Mohamad Hamieh, Jean Baptiste Latouche, Christophe Borg, Talal Al Saati, Jeanne Galaine, L. Rangan, Afag Asgarova, Laurent Beziaud, Magalie Dosset, Julie Francoual, Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (RIGHT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire d'Excellence : Lipoprotéines et Santé : prévention et Traitement des maladies Inflammatoires et du Cancer (LabEx LipSTIC), Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Paris-Sud - Paris 11 (UP11)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut Gustave Roussy (IGR)-Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy)-Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER-UNICANCER-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Montpellier (UM), Université Bourgogne Franche-Comté [COMUE] (UBFC), Plateforme de transfert en biologie cancérologique [Dijon], Centre d'épidémiologie des populations (CEP), Université de Bourgogne (UB)-Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER-UNICANCER-Université de Bourgogne (UB)-Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER-UNICANCER, Génomique et Médecine Personnalisée du Cancer et des Maladies Neuropsychiatriques (GPMCND), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Rouen, Normandie Université (NU), Service d'Oncologie Médicale [CHRU Besançon], Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Franche-Comté (UFC), Centre Régional d'Exploration Fonctionnelle et Ressources Expérimentales (CREFRE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de génétique [Rouen], Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Service d'Anatomie pathologique [CHRU Besançon], Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (HOTE GREFFON), Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-France-Comté] (EFS [Bourgogne-France-Comté])-Université de Franche-Comté (UFC), Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Paris-Sud - Paris 11 (UP11)-École pratique des hautes études (EPHE)-Institut Gustave Roussy (IGR)-Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy)-Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc (CRLCC - CGFL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-France-Comté] (EFS [Bourgogne-France-Comté])-Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon)-Université de Franche-Comté (UFC)-Université de Montpellier (UM), Université de Bourgogne (UB)-Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc (CRLCC - CGFL)-Université de Bourgogne (UB)-Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc (CRLCC - CGFL), Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon)-Université de Franche-Comté (UFC), UPS CREFRE US006, Service d'Histopathologie, Institut National de la Santé et de la Recherche Médicale (INSERM), Service de Pathologie [CHU Besançon], Hôpital Jean Minjoz, université de Bourgogne, LNC, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut Gustave Roussy (IGR)-Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy)-Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER-UNICANCER-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-Université de Montpellier (UM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC ( HOTE GREFFON ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Etablissement français du sang [Bourgogne-France-Comté] ( EFS [Bourgogne-France-Comté] ) -Université de Franche-Comté ( UFC ), Laboratoire d'Excellence : Lipoprotéines et Santé : prévention et Traitement des maladies Inflammatoires et du Cancer ( LabEx LipSTIC ), Institut National de la Recherche Agronomique ( INRA ) -Université Montpellier 2 - Sciences et Techniques ( UM2 ) -Université Paris-Sud - Paris 11 ( UP11 ) -École pratique des hautes études ( EPHE ) -Institut Gustave Roussy ( IGR ) -Centre Hospitalier Régional Universitaire de Nancy ( CHRU Nancy ) -Université de Bourgogne ( UB ) -Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ) -Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc ( CRLCC - CGFL ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Fédération Francophone de la Cancérologie Digestive, FFCD-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-France-Comté] ( EFS [Bourgogne-France-Comté] ) -Centre National de la Recherche Scientifique ( CNRS ) -Centre Hospitalier Régional Universitaire [Besançon] ( CHRU Besançon ) -Université de Franche-Comté ( UFC ), Université Bourgogne Franche-Comté ( UBFC ), Centre d'épidémiologie des populations ( CEP ), Université de Bourgogne ( UB ) -Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc ( CRLCC - CGFL ) -Université de Bourgogne ( UB ) -Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc ( CRLCC - CGFL ), Génomique et Médecine Personnalisée du Cancer et des Maladies Neuropsychiatriques ( GPMCND ), Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Centre Hospitalier Régional Universitaire [Besançon] ( CHRU Besançon ) -Université de Franche-Comté ( UFC ), Institut National de la Santé et de la Recherche Médicale ( INSERM ), CHU Rouen-Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Normandie Université ( NU ), and Centre Hospitalier Régional Universitaire Hôpital Jean Minjoz [Besançon]

Subjects
Male, 0301 basic medicine, sarcoma, medicine.medical_treatment, Gene Expression, Apoptosis, B7-H1 Antigen, [ SDV.CAN ] Life Sciences [q-bio]/Cancer, Mice, 0302 clinical medicine, Cancer immunotherapy, Neoplasms, Monoclonal antibody therapy, biology, 3. Good health, Oncology, 030220 oncology & carcinogenesis, [SDV.IMM]Life Sciences [q-bio]/Immunology, Female, Research Paper, PD-L1, Genetically modified mouse, [SDV.IMM] Life Sciences [q-bio]/Immunology, Cell Survival, T cells, Antineoplastic Agents, Mice, Transgenic, [SDV.CAN]Life Sciences [q-bio]/Cancer, 03 medical and health sciences, Lymphocytes, Tumor-Infiltrating, [SDV.CAN] Life Sciences [q-bio]/Cancer, In vivo, Cell Line, Tumor, HLA-A2 Antigen, HLA transgenic mouse, medicine, Animals, Humans, Tumor microenvironment, cancer immunotherapy, business.industry, Gene Expression Profiling, Disease Models, Animal, 030104 developmental biology, Cell culture, Immunology, biology.protein, Cancer research, business, HLA-DRB1 Chains
Abstract

IF 5.168; International audience; HLA-A*0201/DRB1*0101 transgenic mice (A2/DR1 mice) have been developed to study the immunogenicity of tumor antigen-derived T cell epitopes. To extend the use and application of this mouse model in the field of antitumor immunotherapy, we described a tumor cell line generated from a naturally occurring tumor in A2/DR1 mouse named SARC-L1. Histological and genes signature analysis supported the sarcoma origin of this cell line. While SARC-L1 tumor cells lack HLA-DRB1*0101 expression, a very low expression of HLA-A*0201 molecules was found on these cells. Furthermore they also weakly but constitutively expressed the programmed death-ligand 1 (PD-L1). Interestingly both HLA-A*0201 and PD-L1 expressions can be increased on SARC-L1 after IFN-γ exposure in vitro. We also obtained two genetically modified cell lines highly expressing either HLA-A*0201 or both HLA-A*0201/ HLA-DRB1*0101 molecules referred as SARC-A2 and SARC-A2DR1 respectively. All the SARC-L1-derived cell lines induced aggressive subcutaneous tumors in A2DR1 mice in vivo. The analysis of SARC-L1 tumor microenvironment revealed a strong infiltration by T cells expressing inhibitory receptors such as PD-1 and TIM-3. Finally, we found that SARC-L1 is sensitive to several drugs commonly used to treat sarcoma and also susceptible to anti-PD-L1 monoclonal antibody therapy in vivo. Collectively, we described a novel syngeneic tumor model A2/DR1 mice that could be used as preclinical tool for the evaluation of antitumor immunotherapies.

Published
2017
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4. Circulating NKp46+ Natural Killer cells have a potential regulatory property and predict distinct survival in Non-Small Cell Lung Cancer

Author

Elodie Lauret Marie Joseph, Laura Boullerot, Françoise Le Pimpec-Barthes, Caroline Laheurte, Emilie Picard, Olivier Adotevi, Laurent Beziaud, Magalie Dosset, Jeanne Galaine, Christophe Borg, Virginie Westeel, Marion Jacquin, Béatrice Gaugler, Elizabeth Fabre, Romain Loyon, Laurie Spehner, Yann Godet, Guillaume Eberst, and Anne Caignard

Subjects
0301 basic medicine, lcsh:Immunologic diseases. Allergy, Immunology, Biology, CD16, lcsh:RC254-282, cd16, 03 medical and health sciences, nsclc, nkp46, 0302 clinical medicine, medicine, Immunology and Allergy, Cytotoxic T cell, Cytotoxicity, Receptor, Lung cancer, nk cells, Degranulation, Cancer, medicine.disease, lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens, Immunosurveillance, 030104 developmental biology, Oncology, 030220 oncology & carcinogenesis, Cancer research, prognosis, lcsh:RC581-607
Abstract

Natural killer (NK) cells are innate effector lymphocytes widely involved in cancer immunosurveillance. In this study, we described three circulating NK cell subsets in patients with non-small cell lung cancer (NSCLC). Compared to healthy donors (HD), lower rate of the cytotoxic CD56dim CD16+ NK cells was found in NSCLC patients (76.1% vs 82.4%, P = 0.0041). In contrast, the rate of CD56bright NK cells was similar between patients and HD. We showed in NSCLC patients a higher rate of a NK cell subset with CD56dim CD16− phenotype (16.7% vs 9.9% P = 0.0001). The degranulation property and cytokines production were mainly drive by CD56dim CD16− NK cell subset in patients. Analysis of natural cytotoxicity receptors (NCRs) expression identified four distinct clusters of patients with distinct NK cell subset profiles as compared to one major cluster in HD. Notably the cluster characterized by a low circulating level of NKp46+ NK cell subsets was absent in HD. We showed that the rate of circulating NKp46+ CD56dim CD16+ NK cells influenced the patients’ survival. Indeed, the median overall survival in patients exhibiting high versus low level of this NK cell subset was 16 and 27 months respectively (P = 0.02). Finally, we demonstrated that blocking NKp46 receptor in vitro was able to restore spontaneous tumor specific T cell responses in NSCLC patients. In conclusion, this study showed a distinct distribution and phenotype of circulating NK cell subsets in NSCLC. It also supports the regulatory role of NKp46+ NK cell subset in NSCLC patients.

Published
2019

5. Rapalogs Efficacy Relies on the Modulation of Antitumor T-cell Immunity

Author

Lise Queiroz, Francis Bonnefoy, Béatrice Gaugler, Clémentine Gamonet, Sindy Vrecko, Olivier Adotevi, Eric Tartour, Antoine Thiery-Vuillemin, Thierry Nguyen Tan Hon, Jean-René Pallandre, Laura Mansi, Christophe Borg, Guillaume Mouillet, Patrice Ravel, Elsa Curtit, Yann Godet, Tristan Maurina, Jagadeesh Bayry, Caroline Laheurte, Elodie Lauret Marie-Joseph, Laura Boullerot, Bernard Royer, Xavier Pivot, Laurent Beziaud, L. Rangan, Herrada, Anthony, Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (RIGHT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Service d'Oncologie Médicale [CHRU Besançon], Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Franche-Comté (UFC), Institut de Recherche en Cancérologie de Montpellier (IRCM - U1194 Inserm - UM), CRLCC Val d'Aurelle - Paul Lamarque-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Centre d'Investigation Clinique de Besançon (Inserm CIC 1431), Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Université de Franche-Comté (UFC), Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Centre de Recherche des Cordeliers (CRC (UMR_S_1138 / U1138)), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Paris-Centre de Recherche Cardiovasculaire (PARCC - UMR-S U970), Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté]), Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])

Subjects
0301 basic medicine, Cancer Research, T-Lymphocytes, CCR4, Pharmacology, Mice, 0302 clinical medicine, MESH: Animals, Telomerase, Mice, Inbred BALB C, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, TOR Serine-Threonine Kinases, FOXP3, MESH: Telomerase, MESH: Carcinoma, Renal Cell, Kidney Neoplasms, Temsirolimus, 3. Good health, Oncology, 030220 oncology & carcinogenesis, Female, MESH: Immunosuppressive Agents, Immunosuppressive Agents, medicine.drug, MESH: Cell Line, Tumor, MESH: Interferon-gamma, MESH: Mice, Inbred BALB C, chemical and pharmacologic phenomena, [SDV.CAN]Life Sciences [q-bio]/Cancer, Biology, MESH: Everolimus, Interferon-gamma, 03 medical and health sciences, [SDV.CAN] Life Sciences [q-bio]/Cancer, Immunity, MESH: Mice, Inbred C57BL, Cell Line, Tumor, medicine, Animals, Humans, Everolimus, Carcinoma, Renal Cell, MESH: Mice, PI3K/AKT/mTOR pathway, MESH: TOR Serine-Threonine Kinases, MESH: Humans, Cancer, MESH: Interleukin-2, Th1 Cells, medicine.disease, Mice, Inbred C57BL, 030104 developmental biology, MESH: T-Lymphocytes, MESH: Th1 Cells, Interleukin-2, MESH: Kidney Neoplasms, MESH: Female, CD8, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

The rapalogs everolimus and temsirolimus that inhibit mTOR signaling are used as antiproliferative drugs in several cancers. Here we investigated the influence of rapalogs-mediated immune modulation on their antitumor efficacy. Studies in metastatic renal cell carcinoma patients showed that everolimus promoted high expansion of FoxP3+Helios+Ki67+ regulatory CD4 T cells (Tregs). In these patients, rapalogs strongly enhanced the suppressive functions of Tregs, mainly in a contact-dependent manner. Paradoxically, a concurrent activation of spontaneous tumor-specific Th1 immunity also occurred. Furthermore, a high rate of Eomes+CD8+ T cells was detected in patients after a long-term mTOR inhibition. We found that early changes in the Tregs/antitumor Th1 balance can differentially shape the treatment efficacy. Patients presenting a shift toward decreased Tregs levels and high expansion of antitumor Th1 cells showed better clinical responses. Studies conducted in tumor-bearing mice confirmed the deleterious effect of rapalogs-induced Tregs via a mechanism involving the inhibition of antitumor T-cell immunity. Consequently, the combination of temsirolimus plus CCR4 antagonist, a receptor highly expressed on rapalogs-exposed Tregs, was more effective than monotherapy. Altogether, our results describe for the first time a dual impact of host adaptive antitumor T-cell immunity on the clinical effectiveness of rapalogs and prompt their association with immunotherapies. Cancer Res; 76(14); 4100–12. ©2016 AACR.

Published
2016
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