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Ashraf Y, Mansouri H, Laurent-Matha V, Alcaraz LB, Roger P, Guiu S, Derocq D, Robin G, Michaud HA, Delpech H, Jarlier M, Pugnière M, Robert B, Puel A, Martin L, Landomiel F, Bourquard T, Achour O, Fruitier-Arnaudin I, Pichard A, Deshayes E, Turtoi A, Poupon A, Simony-Lafontaine J, Boissière-Michot F, Pirot N, Bernex F, Jacot W, du Manoir S, Theillet C, Pouget JP, Navarro-Teulon I, Bonnefoy N, Pèlegrin A, Chardès T, Martineau P, Liaudet-Coopman E. Immunotherapy of triple-negative breast cancer with cathepsin D-targeting antibodies. J Immunother Cancer 2019; 7:29. [PMID: 30717773 PMCID: PMC6360707 DOI: 10.1186/s40425-019-0498-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/01/2019] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Triple-negative breast cancer (TNBC) treatment is currently restricted to chemotherapy. Hence, tumor-specific molecular targets and/or alternative therapeutic strategies for TNBC are urgently needed. Immunotherapy is emerging as an exciting treatment option for TNBC patients. The aspartic protease cathepsin D (cath-D), a marker of poor prognosis in breast cancer (BC), is overproduced and hypersecreted by human BC cells. This study explores whether cath-D is a tumor cell-associated extracellular biomarker and a potent target for antibody-based therapy in TNBC. METHODS Cath-D prognostic value and localization was evaluated by transcriptomics, proteomics and immunohistochemistry in TNBC. First-in-class anti-cath-D human scFv fragments binding to both human and mouse cath-D were generated using phage display and cloned in the human IgG1 λ format (F1 and E2). Anti-cath-D antibody biodistribution, antitumor efficacy and in vivo underlying mechanisms were investigated in TNBC MDA-MB-231 tumor xenografts in nude mice. Antitumor effect was further assessed in TNBC patient-derived xenografts (PDXs). RESULTS High CTSD mRNA levels correlated with shorter recurrence-free survival in TNBC, and extracellular cath-D was detected in the tumor microenvironment, but not in matched normal breast stroma. Anti-cath-D F1 and E2 antibodies accumulated in TNBC MDA-MB-231 tumor xenografts, inhibited tumor growth and improved mice survival without apparent toxicity. The Fc function of F1, the best antibody candidate, was essential for maximal tumor inhibition in the MDA-MB-231 model. Mechanistically, F1 antitumor response was triggered through natural killer cell activation via IL-15 upregulation, associated with granzyme B and perforin production, and the release of antitumor IFNγ cytokine. The F1 antibody also prevented the tumor recruitment of immunosuppressive tumor-associated macrophages M2 and myeloid-derived suppressor cells, a specific effect associated with a less immunosuppressive tumor microenvironment highlighted by TGFβ decrease. Finally, the antibody F1 inhibited tumor growth of two TNBC PDXs, isolated from patients resistant or not to neo-adjuvant chemotherapy. CONCLUSION Cath-D is a tumor-specific extracellular target in TNBC suitable for antibody-based therapy. Immunomodulatory antibody-based strategy against cath-D is a promising immunotherapy to treat patients with TNBC.
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Affiliation(s)
- Yahya Ashraf
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Hanane Mansouri
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Valérie Laurent-Matha
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Lindsay B Alcaraz
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Pascal Roger
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
- Department of Pathology, CHU Nîmes, Nîmes, France
| | - Séverine Guiu
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
- Department of Medical Oncology, ICM, Montpellier, France
| | - Danielle Derocq
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Gautier Robin
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Henri-Alexandre Michaud
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Helène Delpech
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | | | - Martine Pugnière
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Bruno Robert
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Anthony Puel
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Lucie Martin
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | | | | | | | | | - Alexandre Pichard
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Emmanuel Deshayes
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Andrei Turtoi
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | | | | | | | - Nelly Pirot
- Réseau d'Histologie Expérimentale de Montpellier, BioCampus, UMS3426 CNRS-US009 INSERM-UM, Montpellier, France
| | - Florence Bernex
- Réseau d'Histologie Expérimentale de Montpellier, BioCampus, UMS3426 CNRS-US009 INSERM-UM, Montpellier, France
| | - William Jacot
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
- Department of Medical Oncology, ICM, Montpellier, France
- Translational Research Unit, ICM, Montpellier, France
| | - Stanislas du Manoir
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Charles Theillet
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Jean-Pierre Pouget
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Isabelle Navarro-Teulon
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Nathalie Bonnefoy
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - André Pèlegrin
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Thierry Chardès
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Pierre Martineau
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France
| | - Emmanuelle Liaudet-Coopman
- IRCM, INSERM, U1194 Univ Montpellier, ICM, 208, rue des Apothicaires, F-34298, Montpellier, Cedex 5, France.
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