1
|
Tai Y, Chow A, Han S, Coker C, Ma W, Gu Y, Estrada Navarro V, Kandpal M, Hibshoosh H, Kalinsky K, Manova-Todorova K, Safonov A, Walsh EM, Robson M, Norton L, Baer R, Merghoub T, Biswas AK, Acharyya S. FLT1 activation in cancer cells promotes PARP-inhibitor resistance in breast cancer. EMBO Mol Med 2024; 16:1957-1980. [PMID: 38956205 PMCID: PMC11319505 DOI: 10.1038/s44321-024-00094-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 06/05/2024] [Accepted: 06/07/2024] [Indexed: 07/04/2024] Open
Abstract
Acquired resistance to PARP inhibitors (PARPi) remains a treatment challenge for BRCA1/2-mutant breast cancer that drastically shortens patient survival. Although several resistance mechanisms have been identified, none have been successfully targeted in the clinic. Using new PARPi-resistance models of Brca1- and Bard1-mutant breast cancer generated in-vivo, we identified FLT1 (VEGFR1) as a driver of resistance. Unlike the known role of VEGF signaling in angiogenesis, we demonstrate a novel, non-canonical role for FLT1 signaling that protects cancer cells from PARPi in-vivo through a combination of cell-intrinsic and cell-extrinsic pathways. We demonstrate that FLT1 blockade suppresses AKT activation, increases tumor infiltration of CD8+ T cells, and causes dramatic regression of PARPi-resistant breast tumors in a T-cell-dependent manner. Moreover, PARPi-resistant tumor cells can be readily re-sensitized to PARPi by targeting Flt1 either genetically (Flt1-suppression) or pharmacologically (axitinib). Importantly, a retrospective series of breast cancer patients treated with PARPi demonstrated shorter progression-free survival in cases with FLT1 activation at pre-treatment. Our study therefore identifies FLT1 as a potential therapeutic target in PARPi-resistant, BRCA1/2-mutant breast cancer.
Collapse
Affiliation(s)
- Yifan Tai
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Department of Biology, McGill University, Montreal, Quebec, QC, H3G0B1, Canada
| | - Angela Chow
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Seoyoung Han
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Jacobs School of Medicine, University of Buffalo, New York, NY, USA
| | - Courtney Coker
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Wanchao Ma
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Yifan Gu
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Valeria Estrada Navarro
- Sandra and Edward Meyer Cancer Center, Weill Cornell Medicine, 1300 York Avenue, New York, NY, 10065, USA
| | - Manoj Kandpal
- Centre for Clinical and Translational Science, Rockefeller University Hospital, 1230 York Ave, New York, NY, 10065, USA
| | - Hanina Hibshoosh
- Department of Pathology and Cell Biology, 630 W 168th St, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Kevin Kalinsky
- Winship Cancer Institute of Emory University, Emory University School of Medicine, 1365 Clifton Road NE, Atlanta, GA, 30322, USA
| | - Katia Manova-Todorova
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
- Drukier Institute for Children's Health, Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Anton Safonov
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Elaine M Walsh
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
- Department of Medicine, Georgetown Lombardi Comprehensive Cancer Center, 3800 Reservoir Rd, NW, Washington DC, 20007, USA
| | - Mark Robson
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Larry Norton
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Richard Baer
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Department of Pathology and Cell Biology, 630 W 168th St, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Taha Merghoub
- Sandra and Edward Meyer Cancer Center, Weill Cornell Medicine, 1300 York Avenue, New York, NY, 10065, USA
| | - Anup K Biswas
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA.
- Department of Pathology and Cell Biology, 630 W 168th St, Columbia University Irving Medical Center, New York, NY, 10032, USA.
| | - Swarnali Acharyya
- Institute for Cancer Genetics, 1130 St Nicholas Avenue, Columbia University Irving Medical Center, New York, NY, 10032, USA.
- Department of Pathology and Cell Biology, 630 W 168th St, Columbia University Irving Medical Center, New York, NY, 10032, USA.
- Herbert Irving Comprehensive Cancer Center, 1130 St. Nicholas Ave, Columbia University Irving Medical Center, New York, NY, 10032, USA.
| |
Collapse
|
2
|
Malik JR, Podany AT, Khan P, Shaffer CL, Siddiqui JA, Baranowska‐Kortylewicz J, Le J, Fletcher CV, Ether SA, Avedissian SN. Chemotherapy in pediatric brain tumor and the challenge of the blood-brain barrier. Cancer Med 2023; 12:21075-21096. [PMID: 37997517 PMCID: PMC10726873 DOI: 10.1002/cam4.6647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/18/2023] [Accepted: 10/12/2023] [Indexed: 11/25/2023] Open
Abstract
BACKGROUND Pediatric brain tumors (PBT) stand as the leading cause of cancer-related deaths in children. Chemoradiation protocols have improved survival rates, even for non-resectable tumors. Nonetheless, radiation therapy carries the risk of numerous adverse effects that can have long-lasting, detrimental effects on the quality of life for survivors. The pursuit of chemotherapeutics that could obviate the need for radiotherapy remains ongoing. Several anti-tumor agents, including sunitinib, valproic acid, carboplatin, and panobinostat, have shown effectiveness in various malignancies but have not proven effective in treating PBT. The presence of the blood-brain barrier (BBB) plays a pivotal role in maintaining suboptimal concentrations of anti-cancer drugs in the central nervous system (CNS). Ongoing research aims to modulate the integrity of the BBB to attain clinically effective drug concentrations in the CNS. However, current findings on the interaction of exogenous chemical agents with the BBB remain limited and do not provide a comprehensive explanation for the ineffectiveness of established anti-cancer drugs in PBT. METHODS We conducted our search for chemotherapeutic agents associated with the blood-brain barrier (BBB) using the following keywords: Chemotherapy in Cancer, Chemotherapy in Brain Cancer, Chemotherapy in PBT, BBB Inhibition of Drugs into CNS, Suboptimal Concentration of CNS Drugs, PBT Drugs and BBB, and Potential PBT Drugs. We reviewed each relevant article before compiling the information in our manuscript. For the generation of figures, we utilized BioRender software. FOCUS We focused our article search on chemical agents for PBT and subsequently investigated the role of the BBB in this context. Our search criteria included clinical trials, both randomized and non-randomized studies, preclinical research, review articles, and research papers. FINDING Our research suggests that, despite the availability of potent chemotherapeutic agents for several types of cancer, the effectiveness of these chemical agents in treating PBT has not been comprehensively explored. Additionally, there is a scarcity of studies examining the role of the BBB in the suboptimal outcomes of PBT treatment, despite the effectiveness of these drugs for other types of tumors.
Collapse
Affiliation(s)
- Johid Reza Malik
- Antiviral Pharmacology LaboratoryCollege of Pharmacy, University of Nebraska Medical CenterOmahaNebraskaUSA
| | - Anthony T. Podany
- Antiviral Pharmacology LaboratoryCollege of Pharmacy, University of Nebraska Medical CenterOmahaNebraskaUSA
- Pediatric Clinical Pharmacology ProgramChild Health Research Institute, University of Nebraska Medical CenterOmahaNebraskaUSA
| | - Parvez Khan
- Department of Biochemistry and Molecular BiologyUniversity of Nebraska Medical CenterOmahaNebraskaUSA
| | - Christopher L. Shaffer
- Pediatric Clinical Pharmacology ProgramChild Health Research Institute, University of Nebraska Medical CenterOmahaNebraskaUSA
| | - Jawed A. Siddiqui
- Department of Biochemistry and Molecular BiologyUniversity of Nebraska Medical CenterOmahaNebraskaUSA
| | | | - Jennifer Le
- University of California San Diego Skaggs School of Pharmacy and Pharmaceutical SciencesSan DiegoCaliforniaUSA
| | - Courtney V. Fletcher
- Antiviral Pharmacology LaboratoryCollege of Pharmacy, University of Nebraska Medical CenterOmahaNebraskaUSA
| | - Sadia Afruz Ether
- Antiviral Pharmacology LaboratoryCollege of Pharmacy, University of Nebraska Medical CenterOmahaNebraskaUSA
| | - Sean N. Avedissian
- Antiviral Pharmacology LaboratoryCollege of Pharmacy, University of Nebraska Medical CenterOmahaNebraskaUSA
- Pediatric Clinical Pharmacology ProgramChild Health Research Institute, University of Nebraska Medical CenterOmahaNebraskaUSA
| |
Collapse
|
3
|
The Anti-Vascular Endothelial Growth Factor Receptor 1 (VEGFR-1) D16F7 Monoclonal Antibody Inhibits Melanoma Adhesion to Soluble VEGFR-1 and Tissue Invasion in Response to Placenta Growth Factor. Cancers (Basel) 2022; 14:cancers14225578. [PMID: 36428669 PMCID: PMC9688925 DOI: 10.3390/cancers14225578] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Placenta growth factor (PlGF) is a member of the vascular endothelial growth factor (VEGF) family involved in tumor-associated angiogenesis and melanoma invasion of the extra-cellular matrix (ECM) through activation of membrane VEGF receptor 1 (VEGFR-1). A soluble VEGFR-1 (sVEGFR-1) form is released in the ECM, where it sequesters proangiogenic factors and stimulates endothelial or tumor cell adhesion and chemotaxis through interaction with α5β1 integrin. The anti-VEGFR-1 monoclonal antibody (D16F7 mAb) inhibits VEGF-A or PlGF-mediated signal transduction without affecting ligand interaction, thus preserving sVEGFR-1 decoy function. The aim of this study was to investigate whether D16F7 mAb hampers melanoma spread by in vitro analysis of cell adhesion to sVEGFR-1, ECM invasion, transmigration through an endothelial cell monolayer and in vivo evaluation of tumor infiltrative potential in a syngeneic murine model. Results indicate that D16F7 mAb significantly inhibits melanoma adhesion to sVEGFR-1 and ECM invasion, as well as transmigration in response to PlGF. Moreover, treatment of melanoma-bearing mice with the anti-VEGFR-1 mAb not only inhibits tumor growth but also induces a significant reduction in bone infiltration associated with a decrease in PlGF-positive melanoma cells. Furthermore, D16F7 mAb reduces PlGF production by melanoma cells. Therefore, blockade of PLGF/VEGFR-1 signaling represents a suitable strategy to counteract the metastatic potential of melanoma.
Collapse
|
4
|
Saulnier-Sholler G, Duda DG, Bergendahl G, Ebb D, Snuderl M, Laetsch TW, Michlitsch J, Hanson D, Isakoff MS, Bielamowicz K, Kraveka JM, Ferguson W, Carmeliet P, De Deene A, Gijsen L, Jain RK. A Phase I Trial of TB-403 in Relapsed Medulloblastoma, Neuroblastoma, Ewing Sarcoma, and Alveolar Rhabdomyosarcoma. Clin Cancer Res 2022; 28:3950-3957. [PMID: 35833850 PMCID: PMC9481695 DOI: 10.1158/1078-0432.ccr-22-1169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/07/2022] [Accepted: 07/08/2022] [Indexed: 11/16/2022]
Abstract
PURPOSE Placental growth factor (PlGF) and its receptor neuropilin 1 are elevated in malignant embryonal tumors and mediate tumor progression by promoting cell proliferation, survival, and metastasis. TB-403 is a blocking monoclonal antibody against PlGF that inhibits tumor growth and increases survival in orthotopic medulloblastoma models. PATIENTS AND METHODS We conducted a phase I, open-label, multicenter, dose-escalation study of TB-403 in pediatric subjects with relapsed or refractory cancers. The study involved four dose levels (20 mg/kg, 50 mg/kg, 100 mg/kg, 175 mg/kg) using a 3 + 3 dose-escalation scheme. Subjects received two doses of TB-403 (days 1 and 15) per cycle. After cycle 1, temozolomide or etoposide could be added. The primary objective was to determine the maximum tolerated dose (MTD) of TB-403 monotherapy during a dose-limiting toxicity assessment period. The secondary and exploratory objectives included efficacy, drug pharmacokinetics, and detection of pharmacodynamic biomarkers. RESULTS Fifteen subjects were treated in four dose levels. All subjects received two doses of TB-403 in cycle 1. Five serious treatment-emergent adverse events were reported in 3 subjects, but MTD was not reached. While no complete nor partial responses were observed, 7 of 11 relapsed subjects with medulloblastoma experienced stable disease, which persisted for more than 100 days in 4 of 7 subjects. CONCLUSIONS TB-403 was safe and well tolerated at all dose levels. No MTD was reached. The results look encouraging and therefore warrant further evaluation of efficacy in pediatric subjects with medulloblastoma.
Collapse
Affiliation(s)
| | - Dan G Duda
- Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | | | - David Ebb
- Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | | | - Theodore W Laetsch
- Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia and Department of Pediatrics and Abramson Family Cancer Research Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jennifer Michlitsch
- University of California, San Francisco Benioff Children's Hospital, Oakland, California
| | - Derek Hanson
- Hackensack University Medical Center, Hackensack, New Jersey
| | | | | | | | - William Ferguson
- Cardinal Glennon Children's Medical Center, St. Louis University School of Medicine, St. Louis, Missouri
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Vascular Metabolism, Center for Cancer Biology, VIB, Leuven, B-3000, Belgium
| | | | | | - Rakesh K Jain
- Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
5
|
Morris RM, Mortimer TO, O’Neill KL. Cytokines: Can Cancer Get the Message? Cancers (Basel) 2022; 14:cancers14092178. [PMID: 35565306 PMCID: PMC9103018 DOI: 10.3390/cancers14092178] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/24/2022] [Accepted: 04/26/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary Cytokines are important molecular players in cancer development, progression, and potential targets for treatment. Despite being small and overlooked, research has revealed that cytokines influence cancer biology in multiple ways. Cytokines are often found to contribute to immune function, cell damage, inflammation, angiogenesis, metastasis, and several other cellular processes important to tumor survival. Cytokines have also proven to have powerful effects on complex tumor microenvironment molecular biology and microbiology. Due to their heavy involvement in critical cancer-related processes, cytokines have also become attractive therapeutic targets for cancer treatment. In this review, we describe the relationship between several cytokines and crucial cancer-promoting processes and their therapeutic potential. Abstract Cytokines are small molecular messengers that have profound effects on cancer development. Increasing evidence shows that cytokines are heavily involved in regulating both pro- and antitumor activities, such as immune activation and suppression, inflammation, cell damage, angiogenesis, cancer stem-cell-like cell maintenance, invasion, and metastasis. Cytokines are often required to drive these cancer-related processes and, therefore, represent an important research area for understanding cancer development and the potential identification of novel therapeutic targets. Interestingly, some cytokines are reported to be related to both pro- and anti-tumorigenicity, indicating that cytokines may play several complex roles relating to cancer pathogenesis. In this review, we discuss some major cancer-related processes and their relationship with several cytokines.
Collapse
|
6
|
Ye X, Gaucher JF, Vidal M, Broussy S. A Structural Overview of Vascular Endothelial Growth Factors Pharmacological Ligands: From Macromolecules to Designed Peptidomimetics. Molecules 2021; 26:6759. [PMID: 34833851 PMCID: PMC8625919 DOI: 10.3390/molecules26226759] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/02/2021] [Accepted: 11/03/2021] [Indexed: 12/27/2022] Open
Abstract
The vascular endothelial growth factor (VEGF) family of cytokines plays a key role in vasculogenesis, angiogenesis, and lymphangiogenesis. VEGF-A is the main member of this family, alongside placental growth factor (PlGF), VEGF-B/C/D in mammals, and VEGF-E/F in other organisms. To study the activities of these growth factors under physiological and pathological conditions, resulting in therapeutic applications in cancer and age-related macular degeneration, blocking ligands have been developed. These have mostly been large biomolecules like antibodies. Ligands with high affinities, at least in the nanomolar range, and accurate structural data from X-ray crystallography and NMR spectroscopy have been described. They constitute the main focus of this overview, which evidences similarities and differences in their binding modes. For VEGF-A ligands, and to a limited extent also for PlGF, a transition is now observed towards developing smaller ligands like nanobodies and peptides. These include unnatural amino acids and chemical modifications for designed and improved properties, such as serum stability and greater affinity. However, this review also highlights the scarcity of such small molecular entities and the striking lack of small organic molecule ligands. It also shows the gap between the rather large array of ligands targeting VEGF-A and the general absence of ligands binding other VEGF members, besides some antibodies. Future developments in these directions are expected in the upcoming years, and the study of these growth factors and their promising therapeutic applications will be welcomed.
Collapse
Affiliation(s)
- Xiaoqing Ye
- Faculté de Pharmacie de Paris, Université de Paris, CiTCoM, 8038 CNRS, U 1268 INSERM, 75006 Paris, France; (X.Y.); (M.V.)
| | - Jean-François Gaucher
- Laboratoire de Cristallographie et RMN Biologiques, Faculté de Pharmacie de Paris, Université de Paris, CiTCoM, 8038 CNRS, 75006 Paris, France;
| | - Michel Vidal
- Faculté de Pharmacie de Paris, Université de Paris, CiTCoM, 8038 CNRS, U 1268 INSERM, 75006 Paris, France; (X.Y.); (M.V.)
- Service Biologie du Médicament, Toxicologie, AP-HP, Hôpital Cochin, 75014 Paris, France
| | - Sylvain Broussy
- Faculté de Pharmacie de Paris, Université de Paris, CiTCoM, 8038 CNRS, U 1268 INSERM, 75006 Paris, France; (X.Y.); (M.V.)
| |
Collapse
|
7
|
Douyère M, Chastagner P, Boura C. Neuropilin-1: A Key Protein to Consider in the Progression of Pediatric Brain Tumors. Front Oncol 2021; 11:665634. [PMID: 34277411 PMCID: PMC8281001 DOI: 10.3389/fonc.2021.665634] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 06/10/2021] [Indexed: 12/12/2022] Open
Abstract
Neuropilins are transmembrane glycoproteins that play important roles in cardiovascular and neuronal development, as well as in immunological system regulations. NRP1 functions as a co-receptor, binding numerous ligands, such as SEMA 3 or VEGF and, by doing so, reinforcing their signaling pathways and can also interface with the cytoplasmic protein synectin. NRP1 is expressed in many cancers, such as brain cancers, and is associated with poor prognosis. The challenge today for patients with pediatric brain tumors is to improve their survival rate while minimizing the toxicity of current treatments. The aim of this review is to highlight the involvement of NRP1 in pediatric brain cancers, focusing essentially on the roles of NRP1 in cancer stem cells and in the regulation of the immune system. For this purpose, recent literature and tumor databases were analyzed to show correlations between NRP1 and CD15 (a stem cancer cells marker), and between NRP1 and PDL1, for various pediatric brain tumors, such as high- and low-grade gliomas, medulloblastomas, and ependymomas. Finally, this review suggests a relevant role for NRP1 in pediatric brain tumors progression and identifies it as a potential diagnostic or therapeutic target to improve survival and life quality of these young patients.
Collapse
Affiliation(s)
| | - Pascal Chastagner
- Université de Lorraine, CNRS, CRAN, Nancy, France.,Service d'Onco-Hématologie Pédiatrique, CHRU-Nancy, Nancy, France
| | - Cédric Boura
- Université de Lorraine, CNRS, CRAN, Nancy, France
| |
Collapse
|
8
|
Kazimova T, Tschanz F, Sharma A, Telarovic I, Wachtel M, Pedot G, Schäfer B, Pruschy M. Paracrine Placental Growth Factor Signaling in Response to Ionizing Radiation Is p53-Dependent and Contributes to Radioresistance. Mol Cancer Res 2021; 19:1051-1062. [PMID: 33619227 DOI: 10.1158/1541-7786.mcr-20-0403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 01/05/2021] [Accepted: 02/16/2021] [Indexed: 11/16/2022]
Abstract
Placental growth factor (PlGF) is a pro-angiogenic, N-glycosylated growth factor, which is secreted under pathologic situations. Here, we investigated the regulation of PlGF in response to ionizing radiation (IR) and its role for tumor angiogenesis and radiosensitivity. Secretion and expression of PlGF was induced in multiple tumor cell lines (medulloblastoma, colon and lung adenocarcinoma) in response to irradiation in a dose- and time-dependent manner. Early upregulation of PlGF expression and secretion in response to irradiation was primarily observed in p53 wild-type tumor cells, whereas tumor cells with mutated p53 only showed a minimal or delayed response. Mechanistic investigations with genetic and pharmacologic targeting of p53 corroborated regulation of PlGF by the tumor suppressor p53 in response to irradiation under normoxic and hypoxic conditions, but with so far unresolved mechanisms relevant for its minimal and delayed expression in tumor cells with a p53-mutated genetic background. Probing a paracrine role of IR-induced PlGF secretion in vitro, migration of endothelial cells was specifically increased towards irradiated PlGF wild type but not towards irradiated PlGF-knockout (PIGF-ko) medulloblastoma cells. Tumors derived from these PlGF-ko cells displayed a reduced growth rate, but similar tumor vasculature formation as in their wild-type counterparts. Interestingly though, high-dose irradiation strongly reduced microvessel density with a concomitant high rate of complete tumor regression only in the PlGF-ko tumors. IMPLICATIONS: Our study shows a strong paracrine vasculature-protective role of PlGF as part of a p53-regulated IR-induced resistance mechanism and suggest PlGF as a promising target for a combined treatment modality with RT.
Collapse
Affiliation(s)
- Tamara Kazimova
- Laboratory for Applied Radiobiology, Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Fabienne Tschanz
- Laboratory for Applied Radiobiology, Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ashish Sharma
- Clinical Science Oncology, Medical & Scientific Affairs, Roche Diagnostics International Ltd., Rotkreuz Switzerland
| | - Irma Telarovic
- Laboratory for Applied Radiobiology, Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Marco Wachtel
- Department of Oncology and Children's Research Center, University Children's Hospital, Zurich, Switzerland
| | - Gloria Pedot
- Department of Oncology and Children's Research Center, University Children's Hospital, Zurich, Switzerland
| | - Beat Schäfer
- Department of Oncology and Children's Research Center, University Children's Hospital, Zurich, Switzerland
| | - Martin Pruschy
- Laboratory for Applied Radiobiology, Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| |
Collapse
|
9
|
Srinivasan ES, Tan AC, Anders CK, Pendergast AM, Sipkins DA, Ashley DM, Fecci PE, Khasraw M. Salting the Soil: Targeting the Microenvironment of Brain Metastases. Mol Cancer Ther 2021; 20:455-466. [PMID: 33402399 PMCID: PMC8041238 DOI: 10.1158/1535-7163.mct-20-0579] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/31/2020] [Accepted: 12/31/2020] [Indexed: 12/14/2022]
Abstract
Paget's "seed and soil" hypothesis of metastatic spread has acted as a foundation of the field for over a century, with continued evolution as mechanisms of the process have been elucidated. The central nervous system (CNS) presents a unique soil through this lens, relatively isolated from peripheral circulation and immune surveillance with distinct cellular and structural composition. Research in primary and metastatic brain tumors has demonstrated that this tumor microenvironment (TME) plays an essential role in the growth of CNS tumors. In each case, the cancerous cells develop complex and bidirectional relationships that reorganize the local TME and reprogram the CNS cells, including endothelial cells, pericytes, astrocytes, microglia, infiltrating monocytes, and lymphocytes. These interactions create a structurally and immunologically permissive TME with malignant processes promoting positive feedback loops and systemic consequences. Strategies to interrupt interactions with the native CNS components, on "salting the soil," to create an inhospitable environment are promising in the preclinical setting. This review aims to examine the general and specific pathways thus far investigated in brain metastases and related work in glioma to identify targetable mechanisms that may have general application across the spectrum of intracranial tumors.
Collapse
Affiliation(s)
- Ethan S Srinivasan
- Duke Brain and Spine Metastases Center, Duke University, Durham, North Carolina
| | - Aaron C Tan
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Carey K Anders
- Duke Brain and Spine Metastases Center, Duke University, Durham, North Carolina
| | | | - Dorothy A Sipkins
- Duke Brain and Spine Metastases Center, Duke University, Durham, North Carolina
| | - David M Ashley
- Duke Brain and Spine Metastases Center, Duke University, Durham, North Carolina
| | - Peter E Fecci
- Duke Brain and Spine Metastases Center, Duke University, Durham, North Carolina
| | - Mustafa Khasraw
- Duke Brain and Spine Metastases Center, Duke University, Durham, North Carolina.
| |
Collapse
|
10
|
Ceci C, Atzori MG, Lacal PM, Graziani G. Role of VEGFs/VEGFR-1 Signaling and its Inhibition in Modulating Tumor Invasion: Experimental Evidence in Different Metastatic Cancer Models. Int J Mol Sci 2020; 21:E1388. [PMID: 32085654 PMCID: PMC7073125 DOI: 10.3390/ijms21041388] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/13/2020] [Accepted: 02/14/2020] [Indexed: 12/14/2022] Open
Abstract
The vascular endothelial growth factor (VEGF) family members, VEGF-A, placenta growth factor (PlGF), and to a lesser extent VEGF-B, play an essential role in tumor-associated angiogenesis, tissue infiltration, and metastasis formation. Although VEGF-A can activate both VEGFR-1 and VEGFR-2 membrane receptors, PlGF and VEGF-B exclusively interact with VEGFR-1. Differently from VEGFR-2, which is involved both in physiological and pathological angiogenesis, in the adult VEGFR-1 is required only for pathological angiogenesis. Besides this role in tumor endothelium, ligand-mediated stimulation of VEGFR-1 expressed in tumor cells may directly induce cell chemotaxis and extracellular matrix invasion. Furthermore, VEGFR-1 activation in myeloid progenitors and tumor-associated macrophages favors cancer immune escape through the release of immunosuppressive cytokines. These properties have prompted a number of preclinical and clinical studies to analyze VEGFR-1 involvement in the metastatic process. The aim of the present review is to highlight the contribution of VEGFs/VEGFR-1 signaling in the progression of different tumor types and to provide an overview of the therapeutic approaches targeting VEGFR-1 currently under investigation.
Collapse
Affiliation(s)
- Claudia Ceci
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (C.C.); (M.G.A.)
| | - Maria Grazia Atzori
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (C.C.); (M.G.A.)
| | - Pedro Miguel Lacal
- Laboratory of Molecular Oncology, “Istituto Dermopatico dell’Immacolata-Istituto di Ricovero e Cura a Carattere Scientifico”, IDI-IRCCS, Via dei Monti di Creta 104, 00167 Rome, Italy;
| | - Grazia Graziani
- Department of Systems Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (C.C.); (M.G.A.)
| |
Collapse
|
11
|
Albonici L, Giganti MG, Modesti A, Manzari V, Bei R. Multifaceted Role of the Placental Growth Factor (PlGF) in the Antitumor Immune Response and Cancer Progression. Int J Mol Sci 2019; 20:ijms20122970. [PMID: 31216652 PMCID: PMC6627047 DOI: 10.3390/ijms20122970] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/10/2019] [Accepted: 06/14/2019] [Indexed: 12/22/2022] Open
Abstract
The sharing of molecules function that affects both tumor growth and neoangiogenesis with cells of the immune system creates a mutual interplay that impairs the host’s immune response against tumor progression. Increasing evidence shows that tumors are able to create an immunosuppressive microenvironment by recruiting specific immune cells. Moreover, molecules produced by tumor and inflammatory cells in the tumor microenvironment create an immunosuppressive milieu able to inhibit the development of an efficient immune response against cancer cells and thus fostering tumor growth and progression. In addition, the immunoediting could select cancer cells that are less immunogenic or more resistant to lysis. In this review, we summarize recent findings regarding the immunomodulatory effects and cancer progression of the angiogenic growth factor namely placental growth factor (PlGF) and address the biological complex effects of this cytokine. Different pathways of the innate and adaptive immune response in which, directly or indirectly, PlGF is involved in promoting tumor immune escape and metastasis will be described. PlGF is important for building up vascular structures and functions. Although PlGF effects on vascular and tumor growth have been widely summarized, its functions in modulating the immune intra-tumoral microenvironment have been less highlighted. In agreement with PlGF functions, different antitumor strategies can be envisioned.
Collapse
Affiliation(s)
- Loredana Albonici
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
| | - Maria Gabriella Giganti
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
| | - Andrea Modesti
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
| | - Vittorio Manzari
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
| | - Roberto Bei
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
| |
Collapse
|
12
|
Raevens S, Fallon MB. Potential Clinical Targets in Hepatopulmonary Syndrome: Lessons From Experimental Models. Hepatology 2018; 68:2016-2028. [PMID: 29729196 PMCID: PMC6204081 DOI: 10.1002/hep.30079] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/20/2018] [Accepted: 04/27/2018] [Indexed: 12/12/2022]
Abstract
Hepatopulmonary syndrome (HPS) is a relatively common and potentially severe pulmonary complication of cirrhosis with increased risk of mortality. In experimental models, a complex interaction between pulmonary endothelial cells, monocytes, and the respiratory epithelium, which produces chemokines, cytokines, and angiogenic growth factors, causes alterations in the alveolar microvasculature, resulting in impaired oxygenation. Model systems are critical for evaluating mechanisms and for preclinical testing in HPS, due to the challenges of evaluating the lung in the setting of advanced liver disease in humans. This review provides an overview of current knowledge and recent findings in the rodent common bile duct ligation model of HPS, which recapitulates many features of human disease. We focus on the concepts of endothelial derangement, monocyte infiltration, angiogenesis, and alveolar type II cell dysfunction as main contributors and potential targets for therapy.
Collapse
Affiliation(s)
- Sarah Raevens
- Department of Gastroenterology and Hepatology – Hepatology Research Unit, Ghent University – Ghent University Hospital, Ghent, Belgium
- Department of Internal Medicine, University of Arizona College of Medicine, Phoenix, Arizona, USA
| | - Michael B. Fallon
- Department of Internal Medicine, University of Arizona College of Medicine, Phoenix, Arizona, USA
| |
Collapse
|
13
|
The role of placental growth factor (PlGF) and its receptor system in retinal vascular diseases. Prog Retin Eye Res 2018; 69:116-136. [PMID: 30385175 DOI: 10.1016/j.preteyeres.2018.10.006] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/23/2018] [Accepted: 10/26/2018] [Indexed: 12/20/2022]
Abstract
Placental growth factor (PlGF) is a member of the vascular endothelial growth factor (VEGF) family. Upon binding to VEGF- and neuropilin-receptor sub-types, PlGF modulates a range of neural, glial and vascular cell responses that are distinct from VEGF-A. As PlGF expression is selectively associated with pathological angiogenesis and inflammation, its blockade does not affect the healthy vasculature. PlGF actions have been extensively described in tumor biology but more recently there has been accumulating preclinical evidence that indicates that this growth factor could have an important role in retinal diseases. High levels of PlGF have been found in aqueous humor, vitreous and/or retina of patients exhibiting retinopathies, especially those with diabetic retinopathy (DR) and neovascular age-related macular degeneration (nvAMD). Expression of this growth factor seems to correlate closely with many of the key pathogenic features of early and late retinopathy in preclinical models. For example, studies using genetic modification and/or pharmacological treatment to block PlGF in the laser-induced choroidal neovascularization (CNV) model, oxygen-induced retinopathy model, as well as various murine diabetic models, have shown that PlGF deletion or inhibition can reduce neovascularization, retinal leakage, inflammation and gliosis, without affecting vascular development or inducing neuronal degeneration. Moreover, an inhibitory effect of PlGF blockade on retinal scarring in the mouse CNV model has also been recently demonstrated and was found to be unique for PlGF inhibition, as compared to various VEGF inhibition strategies. Together, these preclinical results suggest that anti-PlGF therapy might have advantages over anti-VEGF treatment, and that it may have clinical applications as a standalone treatment or in combination with anti-VEGF. Additional clinical studies are clearly needed to further elucidate the role of PlGF and its potential as a therapeutic target in ocular diseases.
Collapse
|
14
|
Raevens S, Geerts A, Paridaens A, Lefere S, Verhelst X, Hoorens A, Van Dorpe J, Maes T, Bracke KR, Casteleyn C, Jonckx B, Horvatits T, Fuhrmann V, Van Vlierberghe H, Van Steenkiste C, Devisscher L, Colle I. Placental growth factor inhibition targets pulmonary angiogenesis and represents a therapy for hepatopulmonary syndrome in mice. Hepatology 2018; 68:634-651. [PMID: 29023811 DOI: 10.1002/hep.29579] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/27/2017] [Accepted: 10/02/2017] [Indexed: 12/30/2022]
Abstract
UNLABELLED Hepatopulmonary syndrome (HPS) is a severe complication of cirrhosis with increased risk of mortality. Pulmonary microvascular alterations are key features of HPS; but underlying mechanisms are incompletely understood, and studies on HPS are limited to rats. Placental growth factor (PlGF), a proangiogenic molecule that is selectively involved in pathological angiogenesis, may play an important role in HPS development; however, its role has never been investigated. In this study, we validated an HPS model by common bile duct ligation (CBDL) in mice, investigated the kinetic changes in pulmonary angiogenesis and inflammation during HPS development, and provide evidence for a novel therapeutic strategy by targeting pathological angiogenesis. Mice with CBDL developed hypoxemia and intrapulmonary shunting on a background of liver fibrosis. Pulmonary alterations included increased levels of proangiogenic and inflammatory markers, which was confirmed in serum of human HPS patients. Increased PlGF production in HPS mice originated from alveolar type II cells and lung macrophages, as demonstrated by immunofluorescent staining. Dysfunctional vessel formation in CBDL mice was visualized by microscopy on vascular corrosion casts. Both prophylactic and therapeutic anti-PlGF (αPlGF) antibody treatment impeded HPS development, as demonstrated by significantly less intrapulmonary shunting and improved gas exchange. αPlGF treatment decreased endothelial cell dysfunction in vivo and in vitro and was accompanied by reduced pulmonary inflammation. Importantly, αPlGF therapy did not affect liver alterations, supporting αPlGF's ability to directly target the pulmonary compartment. CONCLUSION CBDL in mice induces HPS, which is mediated by PlGF production; αPlGF treatment improves experimental HPS by counteracting pulmonary angiogenesis and might be an attractive therapeutic strategy for human HPS. (Hepatology 2017).
Collapse
Affiliation(s)
- Sarah Raevens
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Anja Geerts
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Annelies Paridaens
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Sander Lefere
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Xavier Verhelst
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Anne Hoorens
- Department of Pathology, Ghent University and Ghent University Hospital, Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University and Ghent University Hospital, Ghent, Belgium
| | - Tania Maes
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Ken R Bracke
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Christophe Casteleyn
- Department of Morphology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.,Applied Veterinary Morphology, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | | | - Thomas Horvatits
- Division of Gastroenterology & Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria.,Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Valentin Fuhrmann
- Division of Gastroenterology & Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria.,Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hans Van Vlierberghe
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Christophe Van Steenkiste
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Lindsey Devisscher
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Isabelle Colle
- Department of Gastroenterology and Hepatology, Hepatology Research Unit, Ghent University, Ghent University Hospital, Ghent, Belgium
| |
Collapse
|
15
|
Nguyen QD, De Falco S, Behar-Cohen F, Lam WC, Li X, Reichhart N, Ricci F, Pluim J, Li WW. Placental growth factor and its potential role in diabetic retinopathy and other ocular neovascular diseases. Acta Ophthalmol 2018; 96:e1-e9. [PMID: 27874278 PMCID: PMC5811779 DOI: 10.1111/aos.13325] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 10/02/2016] [Indexed: 12/13/2022]
Abstract
The role of vascular endothelial growth factor (VEGF), including in retinal vascular diseases, has been well studied, and pharmacological blockade of VEGF is the gold standard of treatment for neovascular age‐related macular degeneration, retinal vein occlusion and diabetic macular oedema. Placental growth factor (PGF, previously known as PlGF), a homologue of VEGF, is a multifunctional peptide associated with angiogenesis‐dependent pathologies in the eye and non‐ocular conditions. Animal studies using genetic modification and pharmacological treatment have demonstrated a mechanistic role for PGF in pathological angiogenesis. Inhibition decreases neovascularization and microvascular abnormalities across different models, including oxygen‐induced retinopathy, laser‐induced choroidal neovascularization and in diabetic mice exhibiting retinopathies. High levels of PGF have been found in the vitreous of patients with diabetic retinopathy. Despite these strong animal data, the exact role of PGF in pathological angiogenesis in retinal vascular diseases remains to be defined, and the benefits of PGF‐specific inhibition in humans with retinal neovascular diseases and macular oedema remain controversial. Comparative effectiveness research studies in patients with diabetic retinal disease have shown that treatment that inhibits both VEGF and PGF may provide superior outcomes in certain patients compared with treatment that inhibits only VEGF. This review summarizes current knowledge of PGF, including its relationship to VEGF and its role in pathological angiogenesis in retinal diseases, and identifies some key unanswered questions about PGF that can serve as a pathway for future basic, translational and clinical research.
Collapse
Affiliation(s)
| | - Sandro De Falco
- Angiogenesis Laboratory; Institute of Genetics and Biophysics-CNR; Naples Italy
| | - Francine Behar-Cohen
- INSERM U1138; UMR_S 1138; Research Center of Cordeliers; Paris Descartes University; UPMC University; Sorbonne Paris Cité; Paris France
- Department of Ophthalmology of University of Lausanne; Jules Gonin Hospital; Asylum Foundation for the Blind; Lausanne Switzerland
| | - Wai-Ching Lam
- Department of Ophthalmology; University of Toronto; Toronto Ontario Canada
| | - Xuri Li
- State Key Laboratory of Ophthalmology; Sun-Yat Sen University; Guangzhou China
| | - Nadine Reichhart
- Experimental Ophthalmology; Eye Clinic; Charité Medical University; Berlin Germany
| | - Federico Ricci
- UOSD Retinal Diseases Foundation PTV ‘Polyclinic Tor Vergata’; Rome Italy
| | | | - William W. Li
- The Angiogenesis Foundation; Cambridge Massachusetts USA
| |
Collapse
|
16
|
Alibakhshi A, Abarghooi Kahaki F, Ahangarzadeh S, Yaghoobi H, Yarian F, Arezumand R, Ranjbari J, Mokhtarzadeh A, de la Guardia M. Targeted cancer therapy through antibody fragments-decorated nanomedicines. J Control Release 2017; 268:323-334. [DOI: 10.1016/j.jconrel.2017.10.036] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/22/2017] [Accepted: 10/24/2017] [Indexed: 01/10/2023]
|
17
|
Accelerated growth of hemangioblastoma in pregnancy: the role of proangiogenic factors and upregulation of hypoxia-inducible factor (HIF) in a non-oxygen-dependent pathway. Neurosurg Rev 2017; 42:209-226. [DOI: 10.1007/s10143-017-0910-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 09/16/2017] [Accepted: 09/19/2017] [Indexed: 12/28/2022]
|
18
|
Nejabati HR, Latifi Z, Ghasemnejad T, Fattahi A, Nouri M. Placental growth factor (PlGF) as an angiogenic/inflammatory switcher: lesson from early pregnancy losses. Gynecol Endocrinol 2017; 33:668-674. [PMID: 28447504 DOI: 10.1080/09513590.2017.1318375] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Placental growth factor (PlGF) is an angiogenic factor which belongs to vascular endothelial growth factor (VEGF) family. In addition to the angiogenic function of PlGF, in some conditions such as preeclampsia and early pregnancy losses, it can induce inflammatory reactions which could be accompanied with reduced angiogenesis. Hence, it is crucial to investigate inflammatory and angiogenic switching states and understand underlying mechanisms. PlGF is expressed in endometrium, placenta and trophoblast cells and is involved in maturation of uterine NK cells. Up-regulation of PlGF directs VEGF to VEGFR-2 and reinforces angiogenesis. However, when VEGF/VEGFR-2 signaling pathway is impaired, PlGF may shift to severe inflammation and cause tissue damages which could lead to early pregnancy losses. Downregulation of PlGF has also been reported in pregnancy complications. In this review, we discussed the role of PlGF in embryo implantation failure and early pregnancy loss and also possible mechanisms regarding the role of PlGF in angiogenic/inflammatory switching in early pregnancy losses. Furthermore, we summarized the effects of various compounds on PlGF expression and briefly talked about its therapeutic potential that may be an opportunity for prevention of pregnancy loss.
Collapse
Affiliation(s)
- Hamid Reza Nejabati
- a Women's Reproductive Health Research Center
- b Department of Clinical Biochemistry , Faculty of Medicine , and
| | - Zeinab Latifi
- b Department of Clinical Biochemistry , Faculty of Medicine , and
| | | | - Amir Fattahi
- a Women's Reproductive Health Research Center
- c Department of Reproductive Biology , Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Mohammad Nouri
- c Department of Reproductive Biology , Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences , Tabriz , Iran
| |
Collapse
|
19
|
Wang K, Stark FS, Schlothauer T, Lahr A, Cosson V, Zhi J, Habben K, Tessier J, Schick E, Staack RF, Krieter O. An apparent clinical pharmacokinetic drug-drug interaction between bevacizumab and the anti-placental growth factor monoclonal antibody RO5323441 via a target-trapping mechanism. Cancer Chemother Pharmacol 2017; 79:661-671. [PMID: 28314990 DOI: 10.1007/s00280-017-3242-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 01/07/2017] [Indexed: 11/27/2022]
Abstract
PURPOSE RO5323441 is a humanized anti-placental growth factor (PlGF) monoclonal antibody that has shown preclinical activity in several cancer models. The objective of this analysis is to examine the pharmacokinetic (PK) results from four Phase I studies that have been conducted with RO5323441 (n = 61) and to report an apparent drug-drug interaction observed when RO5323441 was administered in combination with bevacizumab. METHODS The four Phase I studies were a multiple-ascending dose study in 23 patients with solid tumors (Study 1), an open-label study in seven patients with colorectal/ovarian cancer (Study 2), a sorafenib combination study in nine patients with hepatocellular carcinoma (Study 3), and a bevacizumab combination study in 22 patients with recurrent glioblastoma (Study 4). A two-compartment linear population PK model was developed from these four studies to characterize the PK of RO5323441 in patients with cancer. RESULTS The PK properties of RO5323441 were similar in the first three studies. However, substantially higher RO5323441 exposures were observed in Study 4 when RO5323441 was administered in combination with bevacizumab. A linear two-compartmental population PK model indicated that the co-administration of bevacizumab would decrease the clearance of RO5323441 by 53%. Clinical data suggested that the decrease in RO5323441 clearance was inversely associated with bevacizumab exposure. CONCLUSIONS The exact reason for the increase in RO5323441 exposure following bevacizumab co-administration is not currently known. One possibility is a drug-drug interaction via a target-trapping mechanism that is mediated by the vascular endothelial growth factor receptor-1 (VEGFR-1).
Collapse
Affiliation(s)
- Ka Wang
- Roche Innovation Center New York, 430 East 29 Street, New York, NY, 10016, USA.
| | | | | | - Angelika Lahr
- Roche Innovation Center Munich, Nonnenwald 2, 82377, Penzberg, Germany
| | - Valerie Cosson
- Roche Innovation Center Basel, Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Jianguo Zhi
- Roche Innovation Center New York, 430 East 29 Street, New York, NY, 10016, USA
| | - Kai Habben
- Roche Innovation Center Munich, Nonnenwald 2, 82377, Penzberg, Germany
| | - Jean Tessier
- Roche Innovation Center Basel, Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Eginhard Schick
- Roche Innovation Center Basel, Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Roland F Staack
- Roche Innovation Center Munich, Nonnenwald 2, 82377, Penzberg, Germany
| | - Oliver Krieter
- Roche Innovation Center Munich, Nonnenwald 2, 82377, Penzberg, Germany
| |
Collapse
|
20
|
Newell LF, Holtan SG. Placental growth factor: What hematologists need to know. Blood Rev 2017; 31:57-62. [PMID: 27608972 PMCID: PMC5916812 DOI: 10.1016/j.blre.2016.08.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/19/2016] [Accepted: 08/23/2016] [Indexed: 12/16/2022]
Abstract
Although first identified in placenta, the angiogenic factor known as placental growth factor (PlGF) can be widely expressed in ischemic or damaged tissues. Recent studies have indicated that PlGF is a relevant factor in the pathobiology of blood diseases including hemoglobinopathies and hematologic malignancies. Therapies for such blood diseases may one day be based upon these and ongoing investigations into the role of PlGF in sickle cell disease, acute and chronic leukemias, and complications related to hematopoietic cell transplantation. In this review, we summarize recent studies regarding the potential role of PlGF in blood disorders and suggest avenues for future research.
Collapse
Affiliation(s)
- Laura F Newell
- Oregon Health and Science University, Center for Hematologic Malignancies, Portland, OR, USA.
| | - Shernan G Holtan
- University of Minnesota, Blood and Marrow Transplant Program, Minneapolis, MN, USA.
| |
Collapse
|
21
|
Arezumand R, Mahdian R, Zeinali S, Hassanzadeh-Ghassabeh G, Mansouri K, Khanahmad H, Namvar-Asl N, Rahimi H, Behdani M, Cohan RA, Eavazalipour M, Ramazani A, Muyldermans S. Identification and characterization of a novel nanobody against human placental growth factor to modulate angiogenesis. Mol Immunol 2016; 78:183-192. [PMID: 27648860 DOI: 10.1016/j.molimm.2016.09.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 09/06/2016] [Accepted: 09/10/2016] [Indexed: 01/02/2023]
Abstract
Placental growth factor (PlGF), a member of vascular endothelial growth factors (VEGF) family, is considered as an important antigen associated with pathological conditions such as cancer cell growth, and metastasis. PlGF-targeting via nanobody (Nb) therefore could be beneficial to modulate these pathologies. In this work, phage-display and computational approach was employed to develop a high affinity PlGF-specific Nb. An Nb library was constructed against human recombinant PlGF (rPlGF). After panning on immobilized rPlGF the periplasmic-extract (PE) of individual colonies were screened by ELISA (PE-ELISA). The 3D structures of selected Nbs were then homology modeled and energy minimized using the AMBER force field. Binding score calculations were also assessed to reveal possible Nb-PlGF interactions. Via ELISA-based affinity/specificity determinations, the best-qualified Nb was further evaluated by proliferation, migration, 3D capillary formation, invasion assays and on Chick chorioallantoic membrane (CAM) model. An immune library of 1.5×107 individual Nb clones was constructed. By PE-ELISA 12 clones with strong signals were selected. Three out of 12 sequenced Nbs (Nb-C13, Nb-C18 and Nb-C62) showed high binding scores ranging between -378.7 and -461kcal/mol. Compared to a control Nb, Nb-C18 significantly inhibited proliferation, migration and the 3D-capillary formation of HUVEC cells (p<0.05) with an EC50 of 35nM, 42nM and 24nM and invasion of MDA-MB231was significantly suppressed (p<0.05) with an EC50 of57nM. The result of the CAM assay shows that Nb-C18 could inhibit the vascular formation in the chicken chorioallantoic membrane. This Nb can be used as anti-angiogenesis agent in future.
Collapse
Affiliation(s)
- Roghaye Arezumand
- Department of Medical Biotechnology and Molecular Science, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran; Department of Molecular Medicine, Pasture Institute of Iran, Tehran, Iran
| | - Reza Mahdian
- Department of Molecular Medicine, Pasture Institute of Iran, Tehran, Iran
| | - Sirous Zeinali
- Department of Molecular Medicine, Pasture Institute of Iran, Tehran, Iran.
| | - Gholamreza Hassanzadeh-Ghassabeh
- Vrije University Brussel, Research group Cellular & Molecular Immunology, Brussels, Belgium; VIB, Nanobody Service Facility, Vrije University Brussel, Brussels, Belgium
| | - Kamran Mansouri
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hossein Khanahmad
- Department of Molecular Biology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nabiollah Namvar-Asl
- Laboratory of Animal Sciences, Production and Research Complex for Pasteur Institute of Iran, Tehran, Iran
| | - Hamzeh Rahimi
- Department of Molecular Medicine, Pasture Institute of Iran, Tehran, Iran
| | - Mahdi Behdani
- Department of Molecular Medicine, Pasture Institute of Iran, Tehran, Iran
| | - Reza Ahangari Cohan
- Department of Pilot Nanobiotechnology, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran
| | - Mehdi Eavazalipour
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Guilan University of Medical Sciences, Rasht, Iran
| | - Ali Ramazani
- Cancer Gene Therapy Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Serge Muyldermans
- Vrije University Brussel, Research group Cellular & Molecular Immunology, Brussels, Belgium; VIB, Department of Structural Biology, Vrije University Brussel, Belgium
| |
Collapse
|
22
|
Vandewynckel YP, Laukens D, Devisscher L, Bogaerts E, Paridaens A, Van den Bussche A, Raevens S, Verhelst X, Van Steenkiste C, Jonckx B, Libbrecht L, Geerts A, Carmeliet P, Van Vlierberghe H. Placental growth factor inhibition modulates the interplay between hypoxia and unfolded protein response in hepatocellular carcinoma. BMC Cancer 2016; 16:9. [PMID: 26753564 PMCID: PMC4707726 DOI: 10.1186/s12885-015-1990-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 12/08/2015] [Indexed: 01/06/2023] Open
Abstract
Background Hepatocellular carcinoma (HCC) is a leading cause of cancer-related mortality. We previously showed that the inhibition of placental growth factor (PlGF) exerts antitumour effects and induces vessel normalisation, possibly reducing hypoxia. However, the exact mechanism underlying these effects remains unclear. Because hypoxia and endoplasmic reticulum stress, which activates the unfolded protein response (UPR), have been implicated in HCC progression, we assessed the interactions between PlGF and these microenvironmental stresses. Methods PlGF knockout mice and validated monoclonal anti-PlGF antibodies were used in a diethylnitrosamine-induced mouse model for HCC. We examined the interactions among hypoxia, UPR activation and PlGF induction in HCC cells. Results Both the genetic and pharmacological inhibitions of PlGF reduced the chaperone levels and the activation of the PKR-like endoplasmic reticulum kinase (PERK) pathway of the UPR in diethylnitrosamine-induced HCC. Furthermore, we identified that tumour hypoxia was attenuated, as shown by reduced pimonidazole binding. Interestingly, hypoxic exposure markedly activated the PERK pathway in HCC cells in vitro, suggesting that PlGF inhibition may diminish PERK activation by improving oxygen delivery. We also found that PlGF expression is upregulated by different chemical UPR inducers via activation of the inositol-requiring enzyme 1 pathway in HCC cells. Conclusions PlGF inhibition attenuates PERK activation, likely by tempering hypoxia in HCC via vessel normalisation. The UPR, in turn, is able to regulate PlGF expression, suggesting the existence of a feedback mechanism for hypoxia-mediated UPR that promotes the expression of the angiogenic factor PlGF. These findings have important implications for our understanding of the effect of therapies normalising tumour vasculature. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1990-6) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Yves-Paul Vandewynckel
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Debby Laukens
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Lindsey Devisscher
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Eliene Bogaerts
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Annelies Paridaens
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Anja Van den Bussche
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Sarah Raevens
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Xavier Verhelst
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Christophe Van Steenkiste
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | | | - Louis Libbrecht
- Department of Pathology, Ghent University Hospital, Ghent, Belgium.
| | - Anja Geerts
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Centre, KU Leuven, Leuven, Belgium. .,Laboratory of Angiogenesis & Neurovascular Link, Vesalius Research Centre, VIB, Leuven, Belgium.
| | - Hans Van Vlierberghe
- Department of Hepatology and Gastroenterology, Ghent University Hospital, De Pintelaan 185, 1K12IE, B-9000, Ghent, Belgium.
| |
Collapse
|
23
|
|
24
|
Yajima I, Kumasaka MY, Ohnuma S, Ohgami N, Naito H, Shekhar HU, Omata Y, Kato M. Arsenite-Mediated Promotion of Anchorage-Independent Growth of HaCaT Cells through Placental Growth Factor. J Invest Dermatol 2015; 135:1147-1156. [PMID: 25493652 DOI: 10.1038/jid.2014.514] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 11/09/2014] [Accepted: 11/25/2014] [Indexed: 12/19/2022]
|
25
|
Matsui M, Uemura S, Takeda Y, Samejima KI, Matsumoto T, Hasegawa A, Tsushima H, Hoshino E, Ueda T, Morimoto K, Okamoto K, Okada S, Onoue K, Okayama S, Kawata H, Kawakami R, Maruyama N, Akai Y, Iwano M, Shiiki H, Saito Y. Placental Growth Factor as a Predictor of Cardiovascular Events in Patients with CKD from the NARA-CKD Study. J Am Soc Nephrol 2015; 26:2871-81. [PMID: 25788536 DOI: 10.1681/asn.2014080772] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 01/20/2015] [Indexed: 01/04/2023] Open
Abstract
Placental growth factor (PlGF) contributes to atherogenesis through vascular inflammation and plaque destabilization. High levels of PlGF may be associated with mortality and cardiovascular disease, but the relationship between PlGF level and adverse outcomes in patients with CKD is unclear. We conducted a prospective cohort study of 1351 consecutive participants with CKD enrolled in the Novel Assessment of Risk management for Atherosclerotic diseases in CKD (NARA-CKD) study between April 1, 2004, and December 31, 2011. During a median follow-up of 3 years, 199 participants died and 383 had cardiovascular events, defined as atherosclerotic disease or heart failure requiring hospitalization. In adjusted analyses, mortality and cardiovascular risk increased in each successive quartile of serum PlGF level; hazard ratios (HRs) (95% confidence intervals [95% CIs]) for mortality and cardiovascular risk, respectively, were 1.59 (0.83 to 3.16) and 1.55 (0.92 to 2.66) for the second quartile, 2.97 (1.67 to 5.59) and 3.39 (2.20 to 5.41) for the third quartile, and 3.87 (2.24 to 7.08) and 8.42 (5.54 to 13.3) for the fourth quartile. The composite end point of mortality and cardiovascular events occurred during the study period in 76.4% of patients in both the highest PlGF quartile (≥19.6 pg/ml) and the lowest eGFR tertile (<30 ml/min per 1.73 m(2)). The association between PlGF and mortality or cardiovascular events was not attenuated when participants were stratified by age, sex, traditional risk factors, and eGFR. These data suggest elevated PlGF is an independent risk factor for all-cause mortality and cardiovascular events in patients with CKD.
Collapse
Affiliation(s)
| | | | | | - Ken-Ichi Samejima
- First Department of Internal Medicine and Department of Medicine, Ohyodo Town Hospital, Nara, Japan
| | | | | | - Hideo Tsushima
- Department of Medicine, Ohyodo Town Hospital, Nara, Japan
| | - Ei Hoshino
- Department of Medicine, Saisei-kai Nara City Hospital, Nara, Japan
| | | | | | | | | | | | | | | | | | - Naoki Maruyama
- Department of Cardiology, Nara City General Hospital, Nara, Japan
| | | | - Masayuki Iwano
- Department of Nephrology, Fukui University, Fukui, Japan; and
| | - Hideo Shiiki
- Department of Medicine, Uda City General Hospital, Nara, Japan
| | - Yoshihiko Saito
- First Department of Internal Medicine and Department of Regulatory Medicine for Blood Pressure, Nara Medical University, Nara, Japan;
| | | |
Collapse
|
26
|
Lassen U, Chinot OL, McBain C, Mau-Sørensen M, Larsen VA, Barrie M, Roth P, Krieter O, Wang K, Habben K, Tessier J, Lahr A, Weller M. Phase 1 dose-escalation study of the antiplacental growth factor monoclonal antibody RO5323441 combined with bevacizumab in patients with recurrent glioblastoma. Neuro Oncol 2015; 17:1007-15. [PMID: 25665807 DOI: 10.1093/neuonc/nov019] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 01/21/2015] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND We conducted a phase 1 dose-escalation study of RO5323441, a novel antiplacental growth factor (PlGF) monoclonal antibody, to establish the recommended dose for use with bevacizumab and to investigate the pharmacokinetics, pharmacodynamics, safety/tolerability, and preliminary clinical efficacy of the combination. METHODS Twenty-two participants with histologically confirmed glioblastoma in first relapse were treated every 2 weeks with RO5323441 (625 mg, 1250 mg, or 2500 mg) plus bevacizumab (10 mg/kg). A standard 3 + 3 dose-escalation trial design was used. RESULTS RO5323441 combined with bevacizumab was generally well tolerated, and the maximum tolerated dose was not reached. Two participants experienced dose-limiting toxicities (grade 3 meningitis associated with spinal fluid leak [1250 mg] and grade 3 cerebral infarction [2500 mg]). Common adverse events included hypertension (14 participants, 64%), headache (12 participants, 55%), dysphonia (11 participants, 50%) and fatigue (6 participants, 27%).The pharmacokinetics of RO5323441 were linear, over-the-dose range, and bevacizumab exposure was unaffected by RO5323441 coadministration. Modulation of plasmatic angiogenic proteins, with increases in VEGFA and decreases in FLT4, was observed. Dynamic contrast-enhanced/diffusion-weighted MRI revealed large decreases in vascular parameters that were maintained through the dosing period. Combination therapy achieved an overall response rate of 22.7%, including one complete response, and median progression-free and overall survival of 3.5 and 8.5 months, respectively. CONCLUSION The toxicity profile of RO5323441 plus bevacizumab was acceptable and manageable. The observed clinical activity of the combination does not appear to improve on that obtained with single-agent bevacizumab in patients with recurrent glioblastoma.
Collapse
Affiliation(s)
- Ulrik Lassen
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Olivier L Chinot
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Catherine McBain
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Morten Mau-Sørensen
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Vibeke Andrée Larsen
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Maryline Barrie
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Patrick Roth
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Oliver Krieter
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Ka Wang
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Kai Habben
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Jean Tessier
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Angelika Lahr
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| | - Michael Weller
- Department of Oncology, Rigshospitalet, Copenhagen, Denmark (U.L., M.M.-S.); Department of Radiology, Rigshospitalet, Copenhagen, Denmark (V.A.L.); Aix-Marseille University A.P.-H.M., Department of Neuro-Oncology, University Hospital Timone, Marseille, France (O.L.C., M.B.); Department of Clinical Oncology, The Christie Hospital N.H.S Foundation Trust, Manchester, England (C.M.); Department of Neurology, University Hospital Zurich, Zurich, Switzerland (P.R., M.W.); Roche Diagnostics GmbH, Penzberg, Germany (O.K., K.H., A.L.); Hoffmann La Roche Pharmaceuticals, Nutley, NewJersey (K.W.); F. Hoffmann-La Roche Ltd, Basel, Switzerland (J.T.)
| |
Collapse
|
27
|
|
28
|
Antiangiogenesis beyond VEGF inhibition: a journey from antiangiogenic single-target to broad-spectrum agents. Cancer Treat Rev 2013; 40:548-57. [PMID: 24360358 DOI: 10.1016/j.ctrv.2013.11.009] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 11/22/2013] [Accepted: 11/25/2013] [Indexed: 11/21/2022]
Abstract
Although the inhibition of angiogenesis is an established modality of cancer treatment, concerns regarding toxicity and drug resistance still constitute barriers to be overcome. For almost a decade since the approval of bevacizumab in 2004, the efforts on antiangiogenic therapeutics have been mainly focused in inhibiting the VEGF pathway. The ongoing understanding of the complexity of the angiogenic process has broadened the spotlight to include concurrent and downstream players to the list of targeted inhibitors. In this review, we summarize the currently existing and the promising antiangiogenic treatments, envisioning an apparent evolutionary trend towards the development of angiogenesis inhibitors of three modalities: single-target, multi-target, and broad-spectrum agents. The clinical efficacy and some structural aspects of monoclonal antibodies, small molecules, endogenous and synthetic angiogenesis inhibitors and their molecular targets are discussed, and the targeting of endothelial cells with the use of cytotoxic drugs in a metronomic schedule is appraised. The reader is invited to revisit current expectations about antiangiogenic therapy in an attempt to set consistent clinical endpoints from which patients could gain real and lasting clinical benefits.
Collapse
|
29
|
Cagnoni G, Tamagnone L. Semaphorin receptors meet receptor tyrosine kinases on the way of tumor progression. Oncogene 2013; 33:4795-802. [DOI: 10.1038/onc.2013.474] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/25/2013] [Accepted: 09/25/2013] [Indexed: 12/21/2022]
|
30
|
El-Sayed MA, Shabaka AA, El-Shabrawy OA, Yassin NA, Mahmoud SS, El-Shenawy SM, Al-Ashqar E, Eisa WH, Farag NM, El-Shaer MA, Salah N, Al-Abd AM. Tissue distribution and efficacy of gold nanorods coupled with laser induced photoplasmonic therapy in ehrlich carcinoma solid tumor model. PLoS One 2013; 8:e76207. [PMID: 24098446 PMCID: PMC3788801 DOI: 10.1371/journal.pone.0076207] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 08/21/2013] [Indexed: 12/31/2022] Open
Abstract
Gold nanorods (GNR) within tumor microregions are characterized by their ability to absorb near IR light and emit heat in what is called photoplasmonic effect. Yet, the efficacy of nanoparticles is limited due to intratumoral tissue distribution reasons. In addition, distribution of GNRs to normal tissue might result in non specific toxicity. In the current study, we are assessing the intratumoral and tissue distribution of PEGylated GNRs on the top of its antitumor characteristics when given intravenously or intratumoral to solid tumor bearing mice and coupled with laser photoplasmonic sessions. PEGylated GNRs with a longitudinal size of less than 100 nm were prepared with aspect ratio of 4.6 showing strong surface plasmon absorption at wavelength 800 nm. Pharmacokinetics of GNR after single I.V. administration (0.1 mg/kg) showed very short systemic circulating time (less than 3 h). On the other hand, tissue distribution of I.V. GNR (0.1 mg/kg) to normal animals showed preferential deposition in spleen tissue. Repeated administration of I.V. GNR resulted in preferential accumulation in both liver and spleen tissues. In addition, I.V. administration of GNR to Ehrlich carcinoma tumor bearing mice resulted in similar tissue distribution; tumor accumulation and anti-tumor effect compared to intratumoral administration. In conclusion, the concentration of GNR achieved within tumors microregions after I.V. administration was comparable to I.T. administration and sufficient to elicit tumoral growth arrest when coupled with laser-aided photoplasmonic treatment.
Collapse
Affiliation(s)
- Mostafa A. El-Sayed
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Ali A. Shabaka
- Department of Laser Physics, National Research Center, Giza, Egypt
| | | | - Nemat A. Yassin
- Department of Pharmacology, National Research Center, Giza, Egypt
| | | | | | - Emad Al-Ashqar
- Department of Laser Physics, National Research Center, Giza, Egypt
| | - Wael H. Eisa
- Department of Laser Physics, National Research Center, Giza, Egypt
| | - Niveen M. Farag
- Department of Laser Physics, National Research Center, Giza, Egypt
| | | | - Nabila Salah
- Department of Pathology, National Research Center, Giza, Egypt
| | - Ahmed M. Al-Abd
- Department of Pharmacology, National Research Center, Giza, Egypt
- Department of Pharmacology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
- * E-mail:
| |
Collapse
|
31
|
Inhibition of stromal PlGF suppresses the growth of prostate cancer xenografts. Int J Mol Sci 2013; 14:17958-71. [PMID: 24005860 PMCID: PMC3794762 DOI: 10.3390/ijms140917958] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 08/22/2013] [Accepted: 08/26/2013] [Indexed: 01/13/2023] Open
Abstract
The growth and vascularization of prostate cancer is dependent on interactions between cancer cells and supporting stromal cells. The primary stromal cell type found in prostate tumors is the carcinoma-associated fibroblast, which produces placental growth factor (PlGF). PlGF is a member of the vascular endothelial growth factor (VEGF) family of angiogenic molecules and PlGF mRNA levels increase after androgen deprivation therapy in prostate cancer. In this study, we show that PlGF has a direct dose-dependent proliferative effect on human PC-3 prostate cancer cells in vitro and fibroblast-derived PlGF increases PC-3 proliferation in co-culture. In xenograft tumor models, intratumoral administration of murine PlGF siRNA reduced stromal-derived PlGF expression, reduced tumor burden and decreased the number of Ki-67 positive proliferating cells associated with reduced vascular density. These data show that targeting stromal PlGF expression may represent a therapeutic target for the treatment of prostate cancer.
Collapse
|
32
|
Hilfenhaus G, Göhrig A, Pape UF, Neumann T, Jann H, Zdunek D, Hess G, Stassen JM, Wiedenmann B, Detjen K, Pavel M, Fischer C. Placental growth factor supports neuroendocrine tumor growth and predicts disease prognosis in patients. Endocr Relat Cancer 2013; 20:305-19. [PMID: 23463017 DOI: 10.1530/erc-12-0223] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Placental growth factor (PlGF), a VEGF-homolog implicated in tumor angiogenesis and adaptation to antiangiogenic therapy, is emerging as candidate target in malignancies. Here, we addressed the expression, function, and prognostic value of PlGF in neuroendocrine tumors (NETs). PlGF was determined in NET patients' sera collected retrospectively (n=88) and prospectively (n=87) using Roche-Elecsys and correlated with clinicopathological data. Tumoral PlGF was evaluated by immunohistochemistry, effects of PlGF on proliferation and migration in vitro were assessed using different NET cell lines and effects on tumor growth in vivo in orthotopic xenografts. Circulating and tumoral PlGF was elevated in patients with pancreatic NETs (pNETs) compared with control sera and respective healthy tissue. De novo PlGF expression occurred primarily in the tumor stroma, suggesting paracrine stimulatory circuits. Indeed, PlGF enhanced NET proliferation and migration in vitro and, conversely, neutralizing antibodies to PlGF reduced tumor growth in vivo. Elevated circulating PlGF levels in NET patients correlated with advanced tumor grading and were associated with reduced tumor-related survival in pNETs. Subsequent determinations confirmed and extended our observation of elevated PlGF levels in a prospective cohort of grade 1 and grade 2 pNETs (n=30) and intestinal NETs (n=57). In low-grade pNETs, normal circulating PlGF levels were associated with better survival. In intestinal NETs, circulating PlGF above median emerged as an independent prognostic factor for shorter time-to-progression in multivariate analyses. These data assign to PlGF a novel function in the pathobiology of NETs and propose PlGF as a prognostic parameter and therapeutic target.
Collapse
Affiliation(s)
- Georg Hilfenhaus
- Charité Medical Faculty and the Max-Delbrück Center for Molecular Medicine, Lindenberger Weg 80, 13125 Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Snuderl M, Batista A, Kirkpatrick ND, Ruiz de Almodovar C, Riedemann L, Walsh EC, Anolik R, Huang Y, Martin JD, Kamoun W, Knevels E, Schmidt T, Farrar CT, Vakoc BJ, Mohan N, Chung E, Roberge S, Peterson T, Bais C, Zhelyazkova BH, Yip S, Hasselblatt M, Rossig C, Niemeyer E, Ferrara N, Klagsbrun M, Duda DG, Fukumura D, Xu L, Carmeliet P, Jain RK. Targeting placental growth factor/neuropilin 1 pathway inhibits growth and spread of medulloblastoma. Cell 2013; 152:1065-76. [PMID: 23452854 DOI: 10.1016/j.cell.2013.01.036] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 06/09/2012] [Accepted: 01/18/2013] [Indexed: 10/27/2022]
Abstract
Medulloblastoma is the most common pediatric malignant brain tumor. Although current therapies improve survival, these regimens are highly toxic and are associated with significant morbidity. Here, we report that placental growth factor (PlGF) is expressed in the majority of medulloblastomas, independent of their subtype. Moreover, high expression of PlGF receptor neuropilin 1 (Nrp1) correlates with poor overall survival in patients. We demonstrate that PlGF and Nrp1 are required for the growth and spread of medulloblastoma: PlGF/Nrp1 blockade results in direct antitumor effects in vivo, resulting in medulloblastoma regression, decreased metastasis, and increased mouse survival. We reveal that PlGF is produced in the cerebellar stroma via tumor-derived Sonic hedgehog (Shh) and show that PlGF acts through Nrp1-and not vascular endothelial growth factor receptor 1-to promote tumor cell survival. This critical tumor-stroma interaction-mediated by Shh, PlGF, and Nrp1 across medulloblastoma subtypes-supports the development of therapies targeting PlGF/Nrp1 pathway.
Collapse
Affiliation(s)
- Matija Snuderl
- Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Oude Munnink TH, Tamas KR, Lub-de Hooge MN, Vedelaar SR, Timmer-Bosscha H, Walenkamp AM, Weidner KM, Herting F, Tessier J, de Vries EG. Placental Growth Factor (PlGF)–Specific Uptake in Tumor Microenvironment of 89Zr-Labeled PlGF Antibody RO5323441. J Nucl Med 2013; 54:929-35. [DOI: 10.2967/jnumed.112.112086] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
|
35
|
Veeranarayanan S, Poulose AC, Mohamed MS, Varghese SH, Nagaoka Y, Yoshida Y, Maekawa T, Kumar DS. Synergistic targeting of cancer and associated angiogenesis using triple-targeted dual-drug silica nanoformulations for theragnostics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:3476-3489. [PMID: 22865683 DOI: 10.1002/smll.201200874] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Indexed: 06/01/2023]
Abstract
The targeting and therapeutic efficacy of dye- and dual-drug-loaded silica nanoparticles, functionalized with triple targeting ligands specific towards cancer and neoangiogenesis simultaneously, are discussed. This synergized, high-precision, multitarget concept culminates in an elevated uptake of nanoparticles by cancer and angiogenic cells with amplified proficiency, thereby imparting superior therapeutic efficacy against breast cancer cells and completely disabling the migration and angiogenic sprouting ability of activated endothelial cells. The exceptional multimodal efficiency achieved by this single therapeutic nanoformulation holds promise for the synergistic targeting and treatment of the yet elusive cancer and its related angiogenesis in a single, lethal shot.
Collapse
Affiliation(s)
- Srivani Veeranarayanan
- Bio Nano Electronics Research Center, Graduate School of Interdisciplinary New Science, Toyo University, Kawagoe, Saitama 350-8585, Japan
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Nielsen DL, Sengeløv L. Inhibition of placenta growth factor with TB-403: a novel antiangiogenic cancer therapy. Expert Opin Biol Ther 2012; 12:795-804. [PMID: 22506966 DOI: 10.1517/14712598.2012.679655] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION There is clinical evidence that therapies targeting the vascular endothelial growth factor pathway are effective in delaying cancer progression. However, tumors may be either intrinsically resistant or evolve resistance to such therapies. Hence, there is a need for new therapies targeting angiogenesis. AREAS COVERED The data are obtained by searching in the PubMed database. The search terms used included antiangiogenic therapy, TB-403 (RO5323441), placenta growth factor (PlGF) and VEGFR-1 (Flt-1). We review preclinical data concerning the function and inhibition of PlGF and summarize data on expression of PlGF in cancer patients. Data from early-phase clinical trials of TB-403 (RO5323441), a monoclonal antibody inhibiting PlGF, are discussed. Future development strategies, therapeutic potentials and limitations of TB-403 are further evaluated. EXPERT OPINION There are some conflicting data on the function of PlGF and the importance of its role in primary tumor growth. Data from some preclinical models of PlGF inhibition and early-phase clinical trials with TB-403 are, however, promising, although the true potential of the drug is yet to be determined. Further clinical development should be preceded by molecular studies in the context of well-designed preclinical models and/or small translational studies. Future challenges involve identifying predictive biomarkers.
Collapse
Affiliation(s)
- Dorte Lisbet Nielsen
- Department of Oncology, University of Copenhagen, Herlev Hospital, Herlev Ringvej 75, DK-2730 Herlev, Denmark.
| | | |
Collapse
|
37
|
Expression of a functional VEGFR-1 in tumor cells is a major determinant of anti-PlGF antibodies efficacy. Proc Natl Acad Sci U S A 2011; 108:11590-5. [PMID: 21709213 DOI: 10.1073/pnas.1109029108] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
PlGF, one of the ligands for VEGFR-1, has been implicated in tumor angiogenesis. However, more recent studies indicate that genetic or pharmacological inhibition of PlGF signaling does not result in reduction of microvascular density in a variety of tumor models. Here we screened 12 human tumor cell lines and identified 3 that are growth inhibited by anti-PlGF antibodies in vivo. We found that efficacy of anti-PlGF treatment strongly correlates with VEGFR-1 expression in tumor cells, but not with antiangiogenesis. In addition, PlGF induced VEGFR-1 signaling and biological responses in tumor cell lines sensitive to anti-PlGF, but not in refractory tumor cell lines or in endothelial cells. Also, genetic ablation of VEGFR-1 signaling in the host did not affect the efficacy of PlGF blockade. Collectively, these findings suggest that the role of PlGF in tumorigenesis largely consists of promoting autocrine/paracrine growth of tumor cells expressing a functional VEGFR-1 rather than stimulation of angiogenesis.
Collapse
|