1
|
Lu W, Xiao Z, Liao H, Xie J, Gao Y, Xiong W, Zeng Q, Deng Z, Wu J, Chai J, Chen X, Xu X. FS145, the first flea-derived disintegrin, inhibits angiogenesis through specifically binding integrin α vβ 3. Int J Biol Macromol 2024; 259:129289. [PMID: 38211910 DOI: 10.1016/j.ijbiomac.2024.129289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
FS145, a protein containing a WGD motif, was previously described from the salivary transcriptome of the flea Xenopsylla cheopis. Nevertheless, its biological function and complete structure are still uncertain. Herein, FS145 was confirmed to adopt a common αββ structure with the WGD motif exposed on its surface and located right at the top of a loop composed of residues 72-81. Furthermore, FS145 dose-dependently inhibited the proliferation, adhesion, migration, and tube formation of HUVECs by not only binding to integrin αvβ3 but also by subsequently inactivating the FAK/Src/MAPK pathway along with the reduction of the expression of MMP-2, MMP-9, VEGFA, bFGF, Ang2, Tie2, HIF-1α, and FAK. Moreover, FS145 also inhibited aortic vessel sprout and showed strong anti-angiogenic activities as assessed ex vivo, by employing the rat aortic ring assay, chick embryo chorioallantoic membrane, and zebrafish embryo models. Altogether, our results suggest that FS145 suppresses angiogenesis ex vivo and in vitro by blocking integrin αvβ3. The current study reveals the first anti-angiogenesis disintegrin with WGD motif from invertebrates and provides a beneficial pharmacological activity to inhibit abnormal angiogenesis.
Collapse
Affiliation(s)
- Wancheng Lu
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Zhijian Xiao
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Hang Liao
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jianpeng Xie
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China; Department of Pulmonary and Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Yihan Gao
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China; Department of Pulmonary and Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Weichen Xiong
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Qingye Zeng
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Zhenhui Deng
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jiena Wu
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jinwei Chai
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Xin Chen
- Department of Pulmonary and Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Xueqing Xu
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China.
| |
Collapse
|
2
|
Hu Z, Li W, Chen S, Chen D, Xu R, Zheng D, Yang X, Li S, Zhou X, Niu X, Xiao Y, He Z, Li H, Liu J, Sui X, Gao Y. Design of a novel chimeric peptide via dual blockade of CD47/SIRPα and PD-1/PD-L1 for cancer immunotherapy. SCIENCE CHINA. LIFE SCIENCES 2023; 66:2310-2328. [PMID: 37115491 DOI: 10.1007/s11427-022-2285-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/18/2023] [Indexed: 04/29/2023]
Abstract
Although immune checkpoint inhibition has been shown to effectively activate antitumor immunity in various tumor types, only a small subset of patients can benefit from PD-1/PD-L1 blockade. CD47 expressed on tumor cells protects them from phagocytosis through interaction with SIRPα on macrophages, while PD-L1 dampens T cell-mediated tumor killing. Therefore, dual targeting PD-L1 and CD47 may improve the efficacy of cancer immunotherapy. A chimeric peptide Pal-DMPOP was designed by conjugating the double mutation of CD47/SIRPα blocking peptide (DMP) with the truncation of PD-1/PD-L1 blocking peptide OPBP-1(8-12) and was modified by a palmitic acid tail. Pal-DMPOP can significantly enhance macrophage-mediated phagocytosis of tumor cells and activate primary T cells to secret IFN-γ in vitro. Due to its superior hydrolysis-resistant activity as well as tumor tissue and lymph node targeting properties, Pal-DMPOP elicited stronger anti-tumor potency than Pal-DMP or OPBP-1(8-12) in immune-competent MC38 tumor-bearing mice. The in vivo anti-tumor activity was further validated in the colorectal CT26 tumor model. Furthermore, Pal-DMPOP mobilized macrophage and T-cell anti-tumor responses with minimal toxicity. Overall, the first bispecific CD47/SIRPα and PD-1/PD-L1 dual-blockade chimeric peptide was designed and exhibited synergistic anti-tumor efficacy via CD8+ T cell activation and macrophage-mediated immune response. The strategy could pave the way for designing effective therapeutic agents for cancer immunotherapy.
Collapse
Affiliation(s)
- Zheng Hu
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Wanqiong Li
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Shaomeng Chen
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Danhong Chen
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Ran Xu
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Danlu Zheng
- School of Medicine, Shenzhen Campus of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, 518107, China
| | - Xin Yang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Shuzhen Li
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Xiuman Zhou
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Xiaoshuang Niu
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Youmei Xiao
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Zhuoying He
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Huihao Li
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Juan Liu
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China
| | - Xinghua Sui
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China.
| | - Yanfeng Gao
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China.
| |
Collapse
|
3
|
High-Resolution Conformational Analysis of RGDechi-Derived Peptides Based on a Combination of NMR Spectroscopy and MD Simulations. Int J Mol Sci 2022; 23:ijms231911039. [PMID: 36232339 PMCID: PMC9569650 DOI: 10.3390/ijms231911039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/25/2022] Open
Abstract
The crucial role of integrin in pathological processes such as tumor progression and metastasis formation has inspired intense efforts to design novel pharmaceutical agents modulating integrin functions in order to provide new tools for potential therapies. In the past decade, we have investigated the biological proprieties of the chimeric peptide RGDechi, containing a cyclic RGD motif linked to an echistatin C-terminal fragment, able to specifically recognize αvβ3 without cross reacting with αvβ5 and αIIbβ3 integrin. Additionally, we have demonstrated using two RGDechi-derived peptides, called RGDechi1-14 and ψRGDechi, that chemical modifications introduced in the C-terminal part of the peptide alter or abolish the binding to the αvβ3 integrin. Here, to shed light on the structural and dynamical determinants involved in the integrin recognition mechanism, we investigate the effects of the chemical modifications by exploring the conformational space sampled by RGDechi1-14 and ψRGDechi using an integrated natural-abundance NMR/MD approach. Our data demonstrate that the flexibility of the RGD-containing cycle is driven by the echistatin C-terminal region of the RGDechi peptide through a coupling mechanism between the N- and C-terminal regions.
Collapse
|
4
|
Farina B, Andrea C, Del Gatto A, Comegna D, Di Gaetano S, Capasso D, Paladino A, Acconcia C, Teresa Gentile M, Saviano M, Fattorusso R, Zaccaro L, Russo L. A novel approach for studying receptor-ligand interactions on living cells surface by using NUS/T1ρ-NMR methodologies combined with computational techniques: The RGDechi15D-α vβ 5 integrin complex. Comput Struct Biotechnol J 2021; 19:3303-3318. [PMID: 34188779 PMCID: PMC8207173 DOI: 10.1016/j.csbj.2021.05.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 05/22/2021] [Accepted: 05/27/2021] [Indexed: 11/30/2022] Open
Abstract
Structural investigations of receptor-ligand interactions on living cells surface by high-resolution Nuclear Magnetic Resonance (NMR) are problematic due to their short lifetime, which often prevents the acquisition of experiments longer than few hours. To overcome these limitations, we developed an on-cell NMR-based approach for exploring the molecular determinants driving the receptor-ligand recognition mechanism under native conditions. Our method relies on the combination of high-resolution structural and dynamics NMR data with Molecular Dynamics simulations and Molecular Docking studies. The key point of our strategy is the use of Non Uniform Sampling (NUS) and T1ρ-NMR techniques to collect atomic-resolution structural and dynamics information on the receptor-ligand interactions with living cells, that can be used as conformational constraints in computational studies. In fact, the application of these two NMR methodologies allows to record spectra with high S/N ratio and resolution within the lifetime of cells. In particular, 2D NUS [1H–1H] trNOESY spectra are used to explore the ligand conformational changes induced by receptor binding; whereas T1ρ-based experiments are applied to characterize the ligand binding epitope by defining two parameters: T1ρ Attenuation factor and T1ρ Binding Effect. This approach has been tested to characterize the molecular determinants regulating the recognition mechanism of αvβ5-integrin by a selective cyclic binder peptide named RGDechi15D. Our data demonstrate that the developed strategy represents an alternative in-cell NMR tool for studying, at atomic resolution, receptor-ligand recognition mechanism on living cells surface. Additionally, our application may be extremely useful for screening of the interaction profiling of drugs with their therapeutic targets in their native cellular environment.
Collapse
Affiliation(s)
- Biancamaria Farina
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy.,Advanced Accelerator Applications, a Novartis Company, via Vivaldi 43, 81100 Caserta, Italy
| | - Corvino Andrea
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania - Luigi Vanvitelli, via Vivaldi 43, 81100 Caserta, Italy
| | - Annarita Del Gatto
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Via Mezzocannone 16, 80134 Naples, Italy
| | - Daniela Comegna
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy
| | - Sonia Di Gaetano
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Via Mezzocannone 16, 80134 Naples, Italy
| | - Domenica Capasso
- Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Via Mezzocannone 16, 80134 Naples, Italy.,Center for Life Sciences and Technologies (CESTEV) University of Naples Federico II, Via Tommaso De Amicis 95, 80145 Naples, Italy
| | - Antonella Paladino
- Department of Science and Technology, University of Sannio, via Francesco de Sanctis, Benevento 82100, Italy
| | - Clementina Acconcia
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania - Luigi Vanvitelli, via Vivaldi 43, 81100 Caserta, Italy
| | - Maria Teresa Gentile
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania - Luigi Vanvitelli, via Vivaldi 43, 81100 Caserta, Italy
| | - Michele Saviano
- Institute of Crystallography-CNR, Via Amendola 122/O, 70126 Bari, Italy
| | - Roberto Fattorusso
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania - Luigi Vanvitelli, via Vivaldi 43, 81100 Caserta, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Via Mezzocannone 16, 80134 Naples, Italy
| | - Laura Zaccaro
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Via Mezzocannone 16, 80134 Naples, Italy
| | - Luigi Russo
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania - Luigi Vanvitelli, via Vivaldi 43, 81100 Caserta, Italy
| |
Collapse
|
5
|
Structural Insight into Integrin Recognition and Anticancer Activity of Echistatin. Toxins (Basel) 2020; 12:toxins12110709. [PMID: 33182321 PMCID: PMC7695343 DOI: 10.3390/toxins12110709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/01/2020] [Accepted: 11/06/2020] [Indexed: 01/13/2023] Open
Abstract
Echistatin (Ech) is a short disintegrin with a long 42NPHKGPAT C-terminal tail. We determined the 3-D structure of Ech by X-ray crystallography. Superimposition of the structures of chains A and B showed conformational differences in their RGD loops and C-termini. The chain A structure is consistent with our NMR analysis that the GPAT residues of the C-terminus cannot be observed due to high flexibility. The hydrogen bond patterns of the RGD loop and between the RGD loop and C-terminus in Ech were the same as those of the corresponding residues in medium disintegrins. The mutant with C-terminal HKGPAT truncation caused 6.4-, 7.0-, 11.7-, and 18.6-fold decreases in inhibiting integrins αvβ3, αIIbβ3, αvβ5, and α5β1. Mutagenesis of the C-terminus showed that the H44A mutant caused 2.5- and 4.4-fold increases in inhibiting αIIbβ3 and α5β1, and the K45A mutant caused a 2.6-fold decrease in inhibiting αIIbβ3. We found that Ech inhibited VEGF-induced HUVEC proliferation with an IC50 value of 103.2 nM and inhibited the migration of A375, U373MG, and Panc-1 tumor cells with IC50 values of 1.5, 5.7, and 154.5 nM. These findings suggest that Ech is a potential anticancer agent, and its C-terminal region can be optimized to improve its anticancer activity.
Collapse
|
6
|
Capasso D, Del Gatto A, Comegna D, Russo L, Fattorusso R, Saviano M, Di Gaetano S, Zaccaro L. Selective Targeting of αvβ5 Integrin in HepG2 Cell Line by RGDechi15D Peptide. Molecules 2020; 25:molecules25184298. [PMID: 32961684 PMCID: PMC7570809 DOI: 10.3390/molecules25184298] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/25/2020] [Accepted: 09/11/2020] [Indexed: 12/21/2022] Open
Abstract
Recently, the research community has become increasingly concerned with the receptor αvβ5, a member of the well-known integrin family. Different ongoing studies have evidenced that αvβ5 integrin regulates not only physiological processes but also a wide array of pathological events, suggesting the receptor as a valuable biomarker to specifically target for therapeutic/diagnostic purposes. Remarkably, in some tumors the involvement of the receptor in cell proliferation, tumor dissemination and angiogenesis is well-documented. In this scenario, the availability of a selective αvβ5 antagonist without ‘off-target’ protein effects may improve survival rate in patients with highly aggressive tumors, such as hepatocellular carcinoma. We recently reported a cyclic peptide, RGDechi15D, obtained by structure-activity studies. To our knowledge it represents the first peptide-based molecule reported in the literature able to specifically bind αvβ5 integrin and not cross react with αvβ3. Here we demonstrated the ability of the peptide to diminish both adhesion and invasion of HepG2 cells, an in vitro model system for hepatocellular carcinoma, to reduce the cell proliferation through an apoptotic process, and to interfere with the PI3K pathway. The peptide, also decreases the formation of new vessels in endothelial cells. Taken together these results indicate that the peptide can be considered a promising molecule with properties suited to be assessed in the future for its validation as a selective therapeutic/diagnostic weapon in hepatocarcinoma.
Collapse
Affiliation(s)
- Domenica Capasso
- CESTEV, University of Naples “Federico II”, 80145 Naples, Italy;
- CIRPeB, University of Naples “Federico II”, 80134 Naples, Italy; (A.D.G.); (R.F.); (M.S.)
| | - Annarita Del Gatto
- CIRPeB, University of Naples “Federico II”, 80134 Naples, Italy; (A.D.G.); (R.F.); (M.S.)
- Institute of Biostructures and Bioimaging, CNR, 80134 Naples, Italy;
| | - Daniela Comegna
- Institute of Biostructures and Bioimaging, CNR, 80134 Naples, Italy;
| | - Luigi Russo
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania “Luigi Vanvitelli”, 81100 Caserta, Italy;
| | - Roberto Fattorusso
- CIRPeB, University of Naples “Federico II”, 80134 Naples, Italy; (A.D.G.); (R.F.); (M.S.)
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania “Luigi Vanvitelli”, 81100 Caserta, Italy;
| | - Michele Saviano
- CIRPeB, University of Naples “Federico II”, 80134 Naples, Italy; (A.D.G.); (R.F.); (M.S.)
- Institute of Crystallography, CNR, 70126 Bari, Italy
| | - Sonia Di Gaetano
- CIRPeB, University of Naples “Federico II”, 80134 Naples, Italy; (A.D.G.); (R.F.); (M.S.)
- Institute of Biostructures and Bioimaging, CNR, 80134 Naples, Italy;
- Correspondence: (S.D.G.); (L.Z.)
| | - Laura Zaccaro
- CIRPeB, University of Naples “Federico II”, 80134 Naples, Italy; (A.D.G.); (R.F.); (M.S.)
- Institute of Biostructures and Bioimaging, CNR, 80134 Naples, Italy;
- Correspondence: (S.D.G.); (L.Z.)
| |
Collapse
|
7
|
New CXCR4 Antagonist Peptide R (Pep R) Improves Standard Therapy in Colorectal Cancer. Cancers (Basel) 2020; 12:cancers12071952. [PMID: 32708431 PMCID: PMC7409147 DOI: 10.3390/cancers12071952] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/14/2020] [Accepted: 07/16/2020] [Indexed: 12/18/2022] Open
Abstract
The chemokine receptor CXCR4 is overexpressed and functional in colorectal cancer. To investigate the role of CXCR4 antagonism in potentiating colon cancer standard therapy, the new peptide CXCR4 antagonist Peptide R (Pep R) was employed. Human colon cancer HCT116 xenograft-bearing mice were treated with chemotherapeutic agents (CT) 5-Fluorouracil (5FU) and oxaliplatin (OX) or 5FU and radio chemotherapy (RT-CT) in the presence of Pep R. After two weeks, CT plus Pep R reduced by 4-fold the relative tumor volume (RTV) as compared to 2- and 1.6-fold reductions induced, respectively, by CT and Pep R. In vitro Pep R addition to CT/RT-CT impaired HCT116 cell growth and further reduced HCT116 and HT29 clonal capability. Thus, the hypothesis that Pep R could target the epithelial mesenchyme transition (EMT) process was evaluated. While CT decreased ECAD and increased ZEB-1 and CD90 expression, the addition of Pep R restored the pretreatment expression. In HCT116 and HT29 cells, CT/RT-CT induced a population of CD133+CXCR4+ cells, supposedly a stem-resistant cancer cell population, while Pep R reduced it. Taken together, the results showed that targeting CXCR4 ameliorates the effect of treatment in colon cancer through inhibition of cell growth and reversal of EMT treatment-induced markers, supporting further clinical studies.
Collapse
|
8
|
Targeting Tumors Using Peptides. Molecules 2020; 25:molecules25040808. [PMID: 32069856 PMCID: PMC7070747 DOI: 10.3390/molecules25040808] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 12/16/2022] Open
Abstract
To penetrate solid tumors, low molecular weight (Mw < 10 KDa) compounds have an edge over antibodies: their higher penetration because of their small size. Because of the dense stroma and high interstitial fluid pressure of solid tumors, the penetration of higher Mw compounds is unfavored and being small thus becomes an advantage. This review covers a wide range of peptidic ligands—linear, cyclic, macrocyclic and cyclotidic peptides—to target tumors: We describe the main tools to identify peptides experimentally, such as phage display, and the possible chemical modifications to enhance the properties of the identified peptides. We also review in silico identification of peptides and the most salient non-peptidic ligands in clinical stages. We later focus the attention on the current validated ligands available to target different tumor compartments: blood vessels, extracelullar matrix, and tumor associated macrophages. The clinical advances and failures of these ligands and their therapeutic conjugates will be discussed. We aim to present the reader with the state-of-the-art in targeting tumors, by using low Mw molecules, and the tools to identify new ligands.
Collapse
|
9
|
Kim H, Choi HS, Eom JB, Choi Y. Mini-Platform for Off-On Near-Infrared Fluorescence Imaging Using Peptide-Targeting Ligands. Bioconjug Chem 2020; 31:721-728. [PMID: 31895549 DOI: 10.1021/acs.bioconjchem.9b00844] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Here, we propose a zwitterionic near-infrared (NIR) fluorophore-tryptophan (Trp) conjugate with a cleavable linker as a minimal-sized versatile platform (MP) for the preparation of peptide ligand-based off-on type molecular probes. The zwitterionic NIR fluorophore in MP undergoes fluorescence quenching via a photoinduced electron transfer mechanism when in close proximity to tryptophan, and nonspecific binding with serum proteins is minimized by the zwitterionicity of the fluorophore. The linker can be cleaved inside cancer cells in response to tumor-associated stimuli. As a proof-of-concept experiment, ATTO655 was covalently linked with Trp via a diarginine linker to form an MP. A cyclic peptide consisting of Arg-Gly-Asp-d-Phe-Lys (cRGD) was used as a cancer-targeting ligand and was conjugated to the MP to form cRGD-MP. The NIR fluorescence of cRGD-MP could be selectively turned on inside the target cancer cells, thereby enabling specific fluorescence imaging of integrin αvβ3-overexpressing cancer cells in vitro and in vivo.
Collapse
Affiliation(s)
- Hyunjin Kim
- National Cancer Center, 323 Ilsan-ro, Goyang, Gyeonggi-do 10408, Republic of Korea
| | - Hak Soo Choi
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Joo Beom Eom
- Medical Photonics Research Center, Korea Photonics Technology Institute (KOPTI), Gwangju-si 61007, Republic of Korea
| | - Yongdoo Choi
- National Cancer Center, 323 Ilsan-ro, Goyang, Gyeonggi-do 10408, Republic of Korea
| |
Collapse
|
10
|
Recent Advances in Nuclear Imaging of Receptor Expression to Guide Targeted Therapies in Breast Cancer. Cancers (Basel) 2019; 11:cancers11101614. [PMID: 31652624 PMCID: PMC6826563 DOI: 10.3390/cancers11101614] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 10/18/2019] [Indexed: 12/12/2022] Open
Abstract
Breast cancer remains the most frequent cancer in women with different patterns of disease progression and response to treatments. The identification of specific biomarkers for different breast cancer subtypes has allowed the development of novel targeting agents for imaging and therapy. To date, patient management depends on immunohistochemistry analysis of receptor status on bioptic samples. This approach is too invasive, and in some cases, not entirely representative of the disease. Nuclear imaging using receptor tracers may provide whole-body information and detect any changes of receptor expression during disease progression. Therefore, imaging is useful to guide clinicians to select the best treatments for each patient and to evaluate early response thus reducing unnecessary therapies. In this review, we focused on the development of novel tracers that are ongoing in preclinical and/or clinical studies as promising tools to lead treatment decisions for breast cancer management.
Collapse
|
11
|
Farina B, Del Gatto A, Comegna D, Di Gaetano S, Capasso D, Isernia C, Saviano M, Fattorusso R, Zaccaro L, Russo L. Conformational studies of RGDechi peptide by natural-abundance NMR spectroscopy. J Pept Sci 2019; 25:e3166. [PMID: 30884005 DOI: 10.1002/psc.3166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/15/2019] [Accepted: 02/18/2019] [Indexed: 12/24/2022]
Abstract
Integrins are heterodimeric cell-surface proteins that play important roles during developmental and pathological processes. Diverse human pathologies involve integrin adhesion including thrombotic diseases, inflammation, tumour progression, fibrosis, and infectious diseases. Although in the past decade, novel integrin-inhibitor drugs have been developed for integrin-based medical applications, the structural determinants modulating integrin-ligands recognition mechanisms are still poorly understood, reducing the number of integrin subtype exclusive antagonists. In this scenario, we have very recently showed, by means of chemical and biological assays, that a chimeric peptide (named RGDechi), containing a cyclic RGD motif linked to an echistatin C-terminal fragment, is able to interact with the components of integrin family with variable affinities, the highest for αv β3. Here, in order to understand the mechanistic details driving the molecular recognition mechanism of αv β3 by RGDechi, we have performed a detailed structural and dynamics characterization of the free peptide by natural abundance nuclear magnetic resonance (NMR) spectroscopy. Our data indicate that RGDechi presents in solution an heterogeneous conformational ensemble characterized by a more constrained and rigid pentacyclic ring and a largely unstructured acyclic region. Moreover, we propose that the molecular recognition of αv β3 integrin by RGDechi occurs by a combination of conformational selection and induced fit mechanisms. Finally, our study indicates that a detailed NMR characterization, by means of natural abundance 15 N and 13 C, of a mostly unstructured bioactive peptide may provide the molecular basis to get essential structural insights into the binding mechanism to the biological partner.
Collapse
Affiliation(s)
| | - Annarita Del Gatto
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Naples, Italy
| | - Daniela Comegna
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy
| | - Sonia Di Gaetano
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Naples, Italy
| | - Domenica Capasso
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Carla Isernia
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania Luigi Vanvitelli, Caserta, Italy
| | | | - Roberto Fattorusso
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania Luigi Vanvitelli, Caserta, Italy
| | - Laura Zaccaro
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II, Naples, Italy
| | - Luigi Russo
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania Luigi Vanvitelli, Caserta, Italy
| |
Collapse
|
12
|
Siitonen R, Peuhu E, Autio A, Liljenbäck H, Mattila E, Metsälä O, Käkelä M, Saanijoki T, Dijkgraaf I, Jalkanen S, Ivaska J, Roivainen A. 68Ga-DOTA-E[c(RGDfK)] 2 PET Imaging of SHARPIN-Regulated Integrin Activity in Mice. J Nucl Med 2019; 60:1380-1387. [PMID: 30850498 DOI: 10.2967/jnumed.118.222026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 03/04/2019] [Indexed: 12/26/2022] Open
Abstract
Shank-associated RH domain-interacting protein (SHARPIN) is a cytosolic protein that plays a key role in activation of nuclear factor κ-light-chain enhancer of activated B cells and regulation of inflammation. Furthermore, SHARPIN controls integrin-dependent cell adhesion and migration in several normal and malignant cell types, and loss of SHARPIN correlates with increased integrin activity in mice. Arginyl-glycyl-aspartic acid (RGD), a cell adhesion tripeptide motif, is an integrin recognition sequence that facilitates PET imaging of integrin upregulation during tumor angiogenesis. We hypothesized that increased integrin activity due to loss of SHARPIN protein would affect the uptake of αvβ3-selective cyclic, dimeric peptide 68Ga-DOTA-E[c(RGDfK)]2, where E[c(RGDfk)]2 = glutamic acid-[cyclo(arginyl-glycyl-aspartic acid-D-phenylalanine-lysine)], both in several tissue types and in the tumor microenvironment. To test this hypothesis, we used RGD-based in vivo PET imaging to evaluate wild-type (wt) and SHARPIN-deficient mice (Sharpin cpdm , where cpdm = chronic proliferative dermatitis in mice) with and without melanoma tumor allografts. Methods: Sharpin cpdm mice with spontaneous null mutation in the Sharpin gene and their wt littermates with or without B16-F10-luc melanoma tumors were studied by in vivo imaging and ex vivo measurements with cyclic-RGD peptide 68Ga-DOTA-E[c(RGDfK)]2 After the last 68Ga-DOTA-E[c(RGDfK)]2 peptide PET/CT, tumors were cut into cryosections for autoradiography, histology, and immunohistochemistry. Results: The ex vivo uptake of 68Ga-DOTA-E[c(RGDfK)]2 in the mouse skin and tumor was significantly higher in Sharpin cpdm mice than in wt mice. B16-F10-luc tumors were detected 4 d after inoculation, without differences in volume or blood flow between the mouse strains. PET imaging with 68Ga-DOTA-E[c(RGDfK)]2 peptide at day 10 after inoculation revealed significantly higher uptake in the tumors transplanted into Sharpin cpdm mice than in wt mice. Furthermore, tumor vascularization was increased in the Sharpin cpdm mice. Conclusion: Sharpin cpdm mice demonstrated increased integrin activity and vascularization in B16-F10-luc melanoma tumors, as demonstrated by RGD-based in vivo PET imaging. These data indicate that SHARPIN, a protein previously associated with increased cancer growth and metastasis, may also have important regulatory roles in controlling the tumor microenvironment.
Collapse
Affiliation(s)
| | - Emilia Peuhu
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland.,FICAN West Cancer Research Laboratory, University of Turku and Turku University Hospital, Turku, Finland
| | - Anu Autio
- Turku PET Centre, University of Turku, Turku, Finland
| | - Heidi Liljenbäck
- Turku PET Centre, University of Turku, Turku, Finland.,Turku Center for Disease Modeling, University of Turku, Turku, Finland
| | - Elina Mattila
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland
| | - Olli Metsälä
- Turku PET Centre, University of Turku, Turku, Finland
| | - Meeri Käkelä
- Turku PET Centre, University of Turku, Turku, Finland
| | | | - Ingrid Dijkgraaf
- Department of Biochemistry, University of Maastricht, Maastricht, the Netherlands
| | - Sirpa Jalkanen
- MediCity Research Laboratory, University of Turku, Turku, Finland
| | - Johanna Ivaska
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland.,Department of Biochemistry, University of Turku, Turku, Finland; and
| | - Anne Roivainen
- Turku PET Centre, University of Turku, Turku, Finland .,Turku Center for Disease Modeling, University of Turku, Turku, Finland.,Turku PET Centre, Turku University Hospital, Turku, Finland
| |
Collapse
|
13
|
Therapeutic Potential of a Novel α vβ₃ Antagonist to Hamper the Aggressiveness of Mesenchymal Triple Negative Breast Cancer Sub-Type. Cancers (Basel) 2019; 11:cancers11020139. [PMID: 30682838 PMCID: PMC6406933 DOI: 10.3390/cancers11020139] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 01/17/2019] [Accepted: 01/20/2019] [Indexed: 12/20/2022] Open
Abstract
The mesenchymal sub-type of triple negative breast cancer (MES-TNBC) has a highly aggressive behavior and worse prognosis, due to its invasive and stem-like features, that correlate with metastatic dissemination and resistance to therapies. Furthermore, MES-TNBC is characterized by the expression of molecular markers related to the epithelial-to-mesenchymal transition (EMT) program and cancer stem cells (CSCs). The altered expression of αvβ3 integrin has been well established as a driver of cancer progression, stemness, and metastasis. Here, we showed that the high levels of αvβ3 are associated with MES-TNBC and therefore exploited the possibility to target this integrin to reduce the aggressiveness of this carcinoma. To this aim, MES-TNBC cells were treated with a novel peptide, named ψRGDechi, that we recently developed and characterized for its ability to selectively bind and inhibit αvβ3 integrin. Notably, ψRGDechi was able to hamper adhesion, migration, and invasion of MES-TNBC cells, as well as the capability of these cells to form vascular-like structures and mammospheres. In addition, this peptide reversed EMT program inhibits mesenchymal markers. These findings show that targeting αvβ3 integrin by ψRGDechi, it is possible to inhibit some of the malignant properties of MES-TNBC phenotype.
Collapse
|
14
|
Bolzati C, Salvarese N, Carpanese D, Seraglia R, Meléndez-Alafort L, Rosato A, Capasso D, Saviano M, Del Gatto A, Comegna D, Zaccaro L. [ 99mTc][Tc(N)PNP43]-Labeled RGD Peptides As New Probes for a Selective Detection of αvβ 3 Integrin: Synthesis, Structure-Activity and Pharmacokinetic Studies. J Med Chem 2018; 61:9596-9610. [PMID: 30278131 DOI: 10.1021/acs.jmedchem.8b01075] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
New integrin-selective molecules suitable for therapeutic or imaging purposes are currently of interest in development of effective personalized medical platforms. RGDechi is a bifunctional peptide selective for integrin αvβ3. Herein, RGDechi and three truncated derivatives functionalized with a cysteine (1-4) were synthesized and labeled with the [99mTc][Tc(N)PNP43]-synthon ([PNP43 = (CH3)2P(CH2)2N(C2H4OCH3)(CH2)2P(CH3)2]) (99mTc1-4) as a basis for selective integrin recognition. The pharmacological parameters of all radiolabeled peptides were assessed along with the pharmacokinetic profiles of the most promising 99mTc1 and 99mTc2 compounds both on healthy and melanoma-bearing mice. Their metabolism and metabolite identification are also reported. 99mTc1-2 are able to discriminate between endogenously expressed integrins αvβ3 and αvβ5 and possess favorable pharmacokinetics characterized by low liver uptake and rapid elimination from nontarget tissues resulting in positive target-to-nontarget ratios. Results are encouraging; the presented construct can be considered the starting point for the development of agents for the selective detection of αvβ3 expression by SPECT.
Collapse
Affiliation(s)
- Cristina Bolzati
- Institute of Condensed Matter Chemistry and Technologies for Energy ICMATE-CNR , Corso Stati Uniti, 4 , 35127 Padova , Italy
| | - Nicola Salvarese
- Institute of Condensed Matter Chemistry and Technologies for Energy ICMATE-CNR , Corso Stati Uniti, 4 , 35127 Padova , Italy
| | - Debora Carpanese
- Veneto Institute of Oncology IOV-IRCCS , Via Gattamelata, 64 , 35128 Padova , Italy
| | - Roberta Seraglia
- Institute of Condensed Matter Chemistry and Technologies for Energy ICMATE-CNR , Corso Stati Uniti, 4 , 35127 Padova , Italy
| | | | - Antonio Rosato
- Veneto Institute of Oncology IOV-IRCCS , Via Gattamelata, 64 , 35128 Padova , Italy.,Department of Surgery, Oncology and Gastroenterology , University of Padua , via Gattamelata, 64 , 35138 Padova , Italy
| | - Domenica Capasso
- Department of Pharmacy , University of Naples '' Federico II '', Naples , Italy
| | - Michele Saviano
- Institute of Cristallography IC-CNR , Via Amendola 122/O , 70126 Bari , Italy
| | - Annarita Del Gatto
- Institute of Biostructures and Bioimaging IBB-CNR , Via Mezzocannone 16 , 80134 Napoli , Italy
| | - Daniela Comegna
- Institute of Biostructures and Bioimaging IBB-CNR , Via Mezzocannone 16 , 80134 Napoli , Italy
| | - Laura Zaccaro
- Institute of Biostructures and Bioimaging IBB-CNR , Via Mezzocannone 16 , 80134 Napoli , Italy
| |
Collapse
|
15
|
Monti M, De Rosa V, Iommelli F, Carriero MV, Terlizzi C, Camerlingo R, Belli S, Fonti R, Di Minno G, Del Vecchio S. Neutrophil Extracellular Traps as an Adhesion Substrate for Different Tumor Cells Expressing RGD-Binding Integrins. Int J Mol Sci 2018; 19:ijms19082350. [PMID: 30096958 PMCID: PMC6121671 DOI: 10.3390/ijms19082350] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 08/06/2018] [Indexed: 11/16/2022] Open
Abstract
Neutrophil extracellular traps (NETs), in addition to their function as a host defense mechanism, play a relevant role in thrombus formation and metastatic dissemination of cancer cells. Here we screened different cancer cell lines endogenously expressing a variety of integrins for their ability to bind to NETs. To this end, we used NETs isolated from neutrophil-like cells as a substrate for adhesion assays of HT1080, U-87 MG, H1975, DU 145, PC-3 and A-431 cells. Levels of α5, αIIb, αv, β1, β3 and β5 chains were determined by western blot analysis in all cell lines and levels of whole integrins on the plasma membrane were assessed by fluorescence-activated cell sorting (FACS) analysis. We found that high levels of α5β1, αvβ3 and αvβ5 enhance cell adhesion to NETs, whereas low expression of α5β1 prevents cell attachment to NETs. Excess of cyclic RGD peptide inhibited cell adhesion to NETs by competing with fibronectin within NETs. The maximal reduction of such adhesion was similar to that obtained by DNase 1 treatment causing DNA degradation. Our findings indicate that NETs from neutrophil-like cells may be used as a substrate for large screening of the adhesion properties of cancer cells expressing a variety of RGD-binding integrins.
Collapse
Affiliation(s)
- Marcello Monti
- Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli "Federico II", Via S. Pansini 5, 80131 Naples, Italy.
| | - Viviana De Rosa
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, 80145 Naples, Italy.
| | - Francesca Iommelli
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, 80145 Naples, Italy.
| | - Maria Vincenza Carriero
- Dipartimento di Oncologia Sperimentale, IRCCS Istituto Nazionale Tumori "Fondazione G. Pascale", 80145 Naples, Italy.
| | - Cristina Terlizzi
- Dipartimento di Scienze Biomediche Avanzate, Università degli Studi di Napoli "Federico II", Via S. Pansini 5, 80145 Naples, Italy.
| | - Rosa Camerlingo
- Dipartimento di Oncologia Sperimentale, IRCCS Istituto Nazionale Tumori "Fondazione G. Pascale", 80145 Naples, Italy.
| | - Stefania Belli
- Istituto di Genetica e Biofisica, Consiglio Nazionale delle Ricerche, 80131 Naples, Italy.
| | - Rosa Fonti
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, 80145 Naples, Italy.
| | - Giovanni Di Minno
- Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli "Federico II", Via S. Pansini 5, 80131 Naples, Italy.
| | - Silvana Del Vecchio
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, 80145 Naples, Italy.
- Dipartimento di Scienze Biomediche Avanzate, Università degli Studi di Napoli "Federico II", Via S. Pansini 5, 80145 Naples, Italy.
| |
Collapse
|
16
|
Russo L, Farina B, Del Gatto A, Comegna D, Di Gaetano S, Capasso D, Liguoro A, Malgieri G, Saviano M, Fattorusso R, Zaccaro L. Deciphering RGDechi peptide‐α
5
β
1
integrin interaction mode in isolated cell membranes. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Luigi Russo
- Department of EnvironmentalBiological and Pharmaceutical Science and Technology, University of Campania—Luigi Vanvitelli, via Vivaldi 43Caserta81100 Italy
| | - Biancamaria Farina
- Institute of Biostructures and Bioimaging‐CNR, Via Mezzocannone 16Naples80134 Italy
| | - Annarita Del Gatto
- Institute of Biostructures and Bioimaging‐CNR, Via Mezzocannone 16Naples80134 Italy
- Interdepartmental Center of Bioactive PeptideUniversity of Naples Federico II, Via Mezzocannone 16Naples80134 Italy
| | - Daniela Comegna
- Institute of Biostructures and Bioimaging‐CNR, Via Mezzocannone 16Naples80134 Italy
| | - Sonia Di Gaetano
- Institute of Biostructures and Bioimaging‐CNR, Via Mezzocannone 16Naples80134 Italy
- Interdepartmental Center of Bioactive PeptideUniversity of Naples Federico II, Via Mezzocannone 16Naples80134 Italy
| | - Domenica Capasso
- Department of PharmacyUniversity of Naples Federico II, Via Mezzocannone 16Naples80134 Italy
| | - Annamaria Liguoro
- Institute of Biostructures and Bioimaging‐CNR, Via Mezzocannone 16Naples80134 Italy
| | - Gaetano Malgieri
- Department of EnvironmentalBiological and Pharmaceutical Science and Technology, University of Campania—Luigi Vanvitelli, via Vivaldi 43Caserta81100 Italy
| | - Michele Saviano
- Institute of Crystallography‐CNR, Via Amendola 122/OBari70126 Italy
| | - Roberto Fattorusso
- Department of EnvironmentalBiological and Pharmaceutical Science and Technology, University of Campania—Luigi Vanvitelli, via Vivaldi 43Caserta81100 Italy
- Interdepartmental Center of Bioactive PeptideUniversity of Naples Federico II, Via Mezzocannone 16Naples80134 Italy
| | - Laura Zaccaro
- Institute of Biostructures and Bioimaging‐CNR, Via Mezzocannone 16Naples80134 Italy
- Interdepartmental Center of Bioactive PeptideUniversity of Naples Federico II, Via Mezzocannone 16Naples80134 Italy
| |
Collapse
|
17
|
Depalo N, Corricelli M, De Paola I, Valente G, Iacobazzi RM, Altamura E, Debellis D, Comegna D, Fanizza E, Denora N, Laquintana V, Mavelli F, Striccoli M, Saviano M, Agostiano A, Del Gatto A, Zaccaro L, Curri ML. NIR Emitting Nanoprobes Based on Cyclic RGD Motif Conjugated PbS Quantum Dots for Integrin-Targeted Optical Bioimaging. ACS APPLIED MATERIALS & INTERFACES 2017; 9:43113-43126. [PMID: 29148709 DOI: 10.1021/acsami.7b14155] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Here, silica-coated PbS quantum dots (QDs) with photoluminescence emission properties in the near-infrared (NIR) region are proposed as potential effective single particle optical nanoprobes for future in vivo imaging of tumors. The dispersibility in aqueous medium of hydrophobic PbS QDs was accomplished by growing a silica shell on their surface by exploiting a base assisted water-in-oil microemulsion method. The silica-coated PbS QDs were then conjugated with a specifically designed cyclic arginine-glycine-aspartic acid (cRGD) peptide that is able to specifically recognize αvβ3 integrins, which are overexpressed in angiogenic tumor-induced vasculatures and on some solid tumors, to achieve tumor-specific targeting. The cRGD peptide PbS silica-coated QDs were systematically characterized, at each step of their preparation, by means of complementary optical and structural techniques, demonstrating appropriate colloidal stability and the maintenance of their optical futures in aqueous solutions. The cellular uptake of cRGD peptide functionalized luminescent nanostructures in human melanoma cells, where overexpression of αvβ3 was observed, was assessed by means of confocal microscopy analysis and cytometric study. The selectivity of the cRGD peptide PbS silica-coated QDs for the αvβ3 integrin was established, consequently highlighting the significant potential of the developed NIR emitting nanostructures as optically traceable nanoprobes for future αvβ3 integrin receptor in vivo targeting in the NIR region.
Collapse
Affiliation(s)
- N Depalo
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | - M Corricelli
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | - I De Paola
- Istituto di Biostrutture e Bioimmagini-CNR , Via Mezzocannone 16, 80134 Napoli, Italy
| | - G Valente
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | - R M Iacobazzi
- Istituto Tumori IRCCS Giovanni Paolo II , Viale Orazio Flacco 65, 70124 Bari, Italy
| | | | | | - D Comegna
- Istituto di Biostrutture e Bioimmagini-CNR , Via Mezzocannone 16, 80134 Napoli, Italy
| | - E Fanizza
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | - N Denora
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | | | | | - M Striccoli
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | - M Saviano
- Istituto di Cristallografia-CNR Bari , Via Amendola 122/O, 70126 Bari, Italy
| | - A Agostiano
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| | - A Del Gatto
- Istituto di Biostrutture e Bioimmagini-CNR , Via Mezzocannone 16, 80134 Napoli, Italy
| | - L Zaccaro
- Istituto di Biostrutture e Bioimmagini-CNR , Via Mezzocannone 16, 80134 Napoli, Italy
| | - M L Curri
- Istituto per i Processi Chimico-Fisici-CNR SS Bari , Via Orabona 4, 70125 Bari, Italy
| |
Collapse
|
18
|
Comegna D, Zannetti A, Del Gatto A, de Paola I, Russo L, Di Gaetano S, Liguoro A, Capasso D, Saviano M, Zaccaro L. Chemical Modification for Proteolytic Stabilization of the Selective α vβ 3 Integrin RGDechi Peptide: in Vitro and in Vivo Activities on Malignant Melanoma Cells. J Med Chem 2017; 60:9874-9884. [PMID: 29144748 DOI: 10.1021/acs.jmedchem.7b01590] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Herein, we report the synthesis and biological characterization of the new peptide ψRGDechi as the first step toward novel-targeted theranostics in melanoma. This pseudopeptide is designed from our previously reported RGDechi peptide, known to bind selectively αvβ3 integrin, and differs for a modified amide bond at the main protease cleavage site. This chemical modification drastically reduces the enzymatic degradation in serum, compared to its parental peptide, resulting in an overall magnification of the biological activity on a highly expressing αvβ3 human metastatic melanoma cell line. Selective inhibition of cell adhesion, wound healing, and invasion are demonstrated; near-infrared fluorescent ψRGDechi derivative is able to detect αvβ3 integrin in human melanoma xenografts in a selective fashion. More, molecular docking studies confirm that ψRGDechi recognizes the receptor similarly to RGDechi. All these findings pave the way for the future employment of this novel peptide as promising targeting probe and therapeutic agent in melanoma disease.
Collapse
Affiliation(s)
- Daniela Comegna
- Institute of Biostructures and Bioimaging-CNR , Via Mezzocannone 16, 80134 Naples, Italy
| | - Antonella Zannetti
- Institute of Biostructures and Bioimaging-CNR , Via De Amicis 95, 80145 Naples, Italy
| | - Annarita Del Gatto
- Institute of Biostructures and Bioimaging-CNR , Via Mezzocannone 16, 80134 Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II , Via Mezzocannone 16, 80134 Naples, Italy
| | - Ivan de Paola
- Institute of Biostructures and Bioimaging-CNR , Via Mezzocannone 16, 80134 Naples, Italy
| | - Luigi Russo
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania Luigi Vanvitelli , via Vivaldi 43, 81100 Caserta, Italy
| | - Sonia Di Gaetano
- Institute of Biostructures and Bioimaging-CNR , Via Mezzocannone 16, 80134 Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II , Via Mezzocannone 16, 80134 Naples, Italy
| | - Annamaria Liguoro
- Institute of Biostructures and Bioimaging-CNR , Via Mezzocannone 16, 80134 Naples, Italy
| | - Domenica Capasso
- Department of Pharmacy, University of Naples Federico II , Via Mezzocannone 16, 80134 Naples, Italy
| | - Michele Saviano
- Interdepartmental Center of Bioactive Peptide, University of Naples Federico II , Via Mezzocannone 16, 80134 Naples, Italy.,Institute of Crystallography-CNR , Via Amendola 122/O, 70126 Bari, Italy
| | - Laura Zaccaro
- Institute of Biostructures and Bioimaging-CNR , Via Mezzocannone 16, 80134 Naples, Italy.,Interdepartmental Center of Bioactive Peptide, University of Naples Federico II , Via Mezzocannone 16, 80134 Naples, Italy
| |
Collapse
|
19
|
Arrieta O, Garcia-Perez FO, Michel-Tello D, Ramírez-Tirado LA, Pitalua-Cortes Q, Cruz-Rico G, Macedo-Pérez EO, Cardona AF, Garza-Salazar JDL. Response Assessment of 68Ga-DOTA-E-[c(RGDfK)] 2 PET/CT in Lung Adenocarcinoma Patients Treated with Nintedanib Plus Docetaxel. J Nucl Med 2017; 59:403-409. [PMID: 28818987 DOI: 10.2967/jnumed.117.192393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 07/13/2017] [Indexed: 12/22/2022] Open
Abstract
Nintedanib is an oral angiokinase inhibitor used as second-line treatment for non-small cell lung cancer. New radiotracers, such as 68Ga-DOTA-E-[c(RGDfK)]2, that target αvβ3 integrin might have an impact as a noninvasive method for assessing angiogenesis inhibitors. Methods: From July 2011 through October 2015, 38 patients received second-line nintedanib plus docetaxel. All patients underwent PET/CT with 68Ga-DOTA-E-[c(RGDfK)]2 radiotracer and blood-sample tests to quantify angiogenesis factors (fibroblast growth factor, vascular endothelial growth factor, and platelet-derived growth factor AB) before and after completing 2 therapy cycles. Results: Of the 38 patients, 31 had available baseline and follow-up PET/CT. Baseline lung tumor volume addressed with 68Ga-DOTA-E-[c(RGDfK)]2 PET/CT correlated with serum vascular endothelial growth factor levels, whereas baseline lung/liver SUVmax index correlated with platelet-derived growth factor AB. After treatment, the overall response rate and disease control rate were 7.9% and 47.3%, respectively. A greater decrease in lung tumor volume (-37.2% vs. -27.6%) was associated with a better disease control rate in patients (P = 0.005). Median progression-free survival was 3.7 mo. Nonsmokers and patients with a higher baseline lung tumor volume were more likely to have a higher progression-free survival (6.4 vs. 3.74 [P = 0.023] and 6.4 vs. 2.1 [P = 0.003], respectively). Overall survival was not reached. Patients with a greater decrease in lung SUVmax (not reached vs. 7.1 mo; P = 0.016) and a greater decrease in the lung/spleen SUVmax index (not reached vs. 7.1; P = 0.043) were more likely to have a longer overall survival. Conclusion:68Ga-DOTA-E-[c(RGDfK)]2 PET/CT is a potentially useful tool for assessing responses to angiogenesis inhibitors. Further analysis and novel studies are warranted to identify patients who might benefit from this therapy.
Collapse
Affiliation(s)
- Oscar Arrieta
- Thoracic Oncology Unit, Instituto Nacional de Cancerología, Mexico City, Mexico
| | - Francisco O Garcia-Perez
- Department of Nuclear Medicine and Molecular Imagenology, Instituto Nacional de Cancerología, Mexico City, Mexico
| | - David Michel-Tello
- Thoracic Oncology Unit, Instituto Nacional de Cancerología, Mexico City, Mexico
| | | | - Quetzali Pitalua-Cortes
- Department of Nuclear Medicine and Molecular Imagenology, Instituto Nacional de Cancerología, Mexico City, Mexico
| | - Graciela Cruz-Rico
- Laboratory of Personalized Medicine, Instituto Nacional de Cancerología, Mexico City, Mexico
| | | | - Andrés F Cardona
- Clinical and Translational Oncology Group, Clínica del Country, Bogotá, Colombia; and.,Foundation for Clinical and Applied Cancer Research, Bogotá, Colombia
| | | |
Collapse
|
20
|
Monti M, Iommelli F, De Rosa V, Carriero MV, Miceli R, Camerlingo R, Di Minno G, Del Vecchio S. Integrin-dependent cell adhesion to neutrophil extracellular traps through engagement of fibronectin in neutrophil-like cells. PLoS One 2017; 12:e0171362. [PMID: 28166238 PMCID: PMC5293257 DOI: 10.1371/journal.pone.0171362] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 01/18/2017] [Indexed: 12/22/2022] Open
Abstract
Neutrophil extracellular traps (NETs), originally recognized as a host defense mechanism, were reported to promote thrombosis and metastatic dissemination of cancer cells. Here we tested the role of integrins α5β1 and ανβ3 in the adhesion of cancer cells to NETs. Neutrophil-like cells stimulated with calcium ionophore (A23187) were used as a stable source of cell-free NETs-enriched suspensions. Using NETs as an adhesion substrate, two human K562 cell lines, differentially expressing α5β1 and ανβ3 integrins, were subjected to adhesion assays in the presence or absence of DNAse 1, blocking antibodies against α5β1 or ανβ3, alone or in combination with DNAse 1, and Proteinase K. As expected DNAse 1 treatment strongly inhibited adhesion of both cell lines to NETs. An equivalent significant reduction of cell adhesion to NETs was obtained after treatment of cells with blocking antibodies against α5β1 or ανβ3 indicating that both integrins were able to mediate cell adhesion to NETs. Furthermore, the combination of DNAse 1 and anti-integrin antibody treatment almost completely blocked cell adhesion. Western blot analysis and immunoprecipitation experiments showed a dose-dependent increase of fibronectin levels in samples from stimulated neutrophil-like cells and a direct or indirect interaction of fibronectin with histone H3. Finally, co-immunolocalization studies with confocal microscopy showed that fibronectin and citrullinated histone H3 co-localize inside the web-structure of NETs. In conclusion, our study showed that α5β1 and ανβ3 integrins mediate cell adhesion to NETs by binding to their common substrate fibronectin. Therefore, in addition to mechanical trapping and aspecific adsorption of different cell types driven by DNA/histone complexes, NETs may provide specific binding sites for integrin-mediated cell adhesion of neutrophils, platelets, endothelial and cancer cells thus promoting intimate interactions among these cells.
Collapse
Affiliation(s)
- Marcello Monti
- Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli “Federico II”, Naples, Italy
| | - Francesca Iommelli
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Viviana De Rosa
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Maria Vincenza Carriero
- Dipartimento di Oncologia Sperimentale, IRCCS Istituto Nazionale Tumori “Fondazione G. Pascale”, Naples, Italy
| | - Roberta Miceli
- Dipartimento di Oncologia Sperimentale, IRCCS Istituto Nazionale Tumori “Fondazione G. Pascale”, Naples, Italy
| | - Rosa Camerlingo
- Dipartimento di Oncologia Sperimentale, IRCCS Istituto Nazionale Tumori “Fondazione G. Pascale”, Naples, Italy
| | - Giovanni Di Minno
- Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli “Federico II”, Naples, Italy
| | - Silvana Del Vecchio
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche, Naples, Italy
- Dipartimento di Scienze Biomediche Avanzate, Università degli Studi di Napoli “Federico II”, Naples, Italy
- * E-mail:
| |
Collapse
|
21
|
Colin DJ, Inkster JAH, Germain S, Seimbille Y. Preclinical validations of [ 18F]FPyPEGCBT- c(RGDfK): a 18F-labelled RGD peptide prepared by ligation of 2-cyanobenzothiazole and 1,2-aminothiol to image angiogenesis. EJNMMI Radiopharm Chem 2017; 1:16. [PMID: 29564392 PMCID: PMC5843817 DOI: 10.1186/s41181-016-0019-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 10/11/2016] [Indexed: 12/13/2022] Open
Abstract
Background αVβ3, αVβ5 and α5β1 integrins are known to be involved in carcinogenesis and are overexpressed in many types of tumours compared to healthy tissues; thereby they have been selected as promising therapeutic targets. Positron emission tomography (PET) is providing a unique non-invasive screening assay to discriminate which patient is more prone to benefit from antiangiogenic therapies, and extensive research has been carried out to develop a clinical radiopharmaceutical that binds specifically to integrin receptors. We recently reported the synthesis of a new 18F-labelled RGD peptide prepared by 2-cyanobenzothiazole (CBT)/1,2-aminothiol conjugation. This study aims at characterising the preclinical biologic properties of this new tumour-targeting ligand, named [18F]FPyPEGCBT-c(RGDfK). The in vitro binding properties of [18F]FPyPEGCBT-c(RGDfK) were analysed by standard binding assay in U-87 MG and SKOV-3 cancer models and its selectivity towards integrins by siRNA depletions. Its preclinical potential was studied in mice bearing subcutaneous tumours by ex vivo biodistribution studies and in vivo microPET/CT imaging. Results In vitro, FPyPEGCBT-c(RGDfK) efficiently bound RGD-recognising integrins as compared to a control c(RGDfV) peptide (IC50 = 30.8 × 10−7 M vs. 6.0 × 10−7 M). [18F]FPyPEGCBT-c(RGDfK) cell uptake was mediated by an active transport through binding to αV, β3 and β5 but not to β1 subunits. In vivo, this new tracer demonstrated specific tumour uptake with %ID/g of 2.9 and 2.4 in U-87 MG and SKOV-3 tumours 1 h post injection. Tumour-to-muscle ratios of 4 were obtained 1 h after intravenous administration of the tracer allowing good visualisation of the tumours. However, unfavourable background accumulation and high hepatobiliary excretion were observed. Conclusion [18F]FPyPEGCBT-c(RGDfK) specifically detects tumours expressing RGD-recognising integrin receptors in preclinical studies. Further optimisation of this radioligand may yield candidates with improved imaging properties and would warrant the further use of this efficient labelling technique for alternative targeting vectors. Electronic supplementary material The online version of this article (doi:10.1186/s41181-016-0019-z) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Didier J Colin
- MicroPET/SPECT/CT Imaging Laboratory, Centre for BioMedical Imaging (CIBM), University Hospital of Geneva, 1211 Geneva, Switzerland
| | - James A H Inkster
- Cyclotron Unit, University Hospital of Geneva, 1211 Geneva, Switzerland
| | - Stéphane Germain
- MicroPET/SPECT/CT Imaging Laboratory, Centre for BioMedical Imaging (CIBM), University Hospital of Geneva, 1211 Geneva, Switzerland
| | - Yann Seimbille
- Cyclotron Unit, University Hospital of Geneva, 1211 Geneva, Switzerland.,TRIUMF, Life Sciences Division, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 Canada
| |
Collapse
|
22
|
He Z, Zhang X, Huang J, Wu Y, Huang X, Chen J, Xia J, Jiang H, Ma J, Wu J. Immune activity and biodistribution of polypeptide K237 and folic acid conjugated amphiphilic PEG-PLGA copolymer nanoparticles radiolabeled with 99mTc. Oncotarget 2016; 7:76635-76646. [PMID: 27791199 PMCID: PMC5363536 DOI: 10.18632/oncotarget.12850] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/12/2016] [Indexed: 12/29/2022] Open
Abstract
In a previous study, amphiphilic copolymer, polypeptide K237 (HTMYYHHYQHHL) and folic acid (FA) modified poly(ethylene glycol)-poly(lactic-co-glycolic acid) (K237/FA-PEG-PLGA) nanoparticles were developed and studied as a drug carrier. To further promote the clinical application of K237/FA-PEG-PLGA nanoparticles and provide guidance for future research, we need to examine their specific biodistribution in vivo. In this study, K237/FA-PEG-PLGA nanoparticles were effectively labeled by a direct method with Technetium-99m (99mTc) using stannous chloride as a reducing agent. The optimal stability of the labeled nanoparticles was determined by evaluating their radiochemical purity in serum, physiological saline, diethylenetriaminepentaacetic acid (DTPA) and cysteine solutions. The affinity of ligands and receptors was elicited by cell binding and blocking experiments in KDR/folate receptor high expressing SKOV-3 ovarian cancer cells. The nanoparticles biodistribution was studied after intravenous administration in healthy mice xenografted with SKOV-3 cells. A higher percent injected dose per gram of tissue (% ID/g) was observed in liver, kidney, spleen, blood and tumor at 3 and 9 h post-injection. Scintigraphic images revealed that the radioactivity was mainly concentrated in tumor, liver, kidney and bladder; and in the heart, lung, and muscle was significantly lower at 3 h. The radioactivity distribution in the images is consistent with the in vivo biodistribution data. Our works demonstrated that K237/FA-PEG-PLGA nanoparticles have great potential as biodegradable drug carriers, especially for tumors expressing the folate and KDr receptor.
Collapse
Affiliation(s)
- Zelai He
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- The First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Xiangyu Zhang
- Department of Pathology, Jining No.1 Peoples' Hospital, Jining, China
| | - Jingwen Huang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- The First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Yufeng Wu
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Xuanzhang Huang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jie Chen
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Junyong Xia
- Department of Nuclear Medicine, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Hao Jiang
- The First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Jing Ma
- Ultrasonic Department, Shanghai Songjiang Center Hospital, Shanghai, China
| | - Jian Wu
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| |
Collapse
|
23
|
Chakravarty R, Goel S, Hong H, Chen F, Valdovinos HF, Hernandez R, Barnhart TE, Cai W. Hollow mesoporous silica nanoparticles for tumor vasculature targeting and PET image-guided drug delivery. Nanomedicine (Lond) 2016; 10:1233-46. [PMID: 25955122 DOI: 10.2217/nnm.14.226] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
AIM Development of multifunctional and well-dispersed hollow mesoporous silica nanoparticles (HMSNs) for tumor vasculature targeted drug delivery and PET imaging. MATERIALS & METHODS Amine functionalized HMSNs (150-250 nm) were conjugated with a macrocyclic chelator, (S)-2-(4-isothiocyanatobenzyl)-1,4,7-triazacyclononane-1,4,7-triaceticacid (NOTA), PEGylated and loaded with antiangiogenesis drug, Sunitinib. Cyclo(Arg-Gly-Asp-D-Tyr-Lys) (cRGDyK) peptide was attached to the nanoconjugate and radiolabeled with (64)Cu for PET imaging. RESULTS (64)Cu-NOTA-HMSN-PEG-cRGDyK exhibited integrin-specific uptake both in vitro and in vivo. PET results indicated approximately 8% ID/g uptake of targeted nanoconjugates in U87MG tumors, which correlated well with ex vivo and histological analyses. Enhanced tumor-targeted delivery of sunitinib was also observed. CONCLUSION We successfully developed tumor vasculature targeted HMSNs for PET imaging and image-guided drug delivery.
Collapse
Affiliation(s)
- Rubel Chakravarty
- Department of Radiology, University of Wisconsin-Madison, WI 53792-3252, USA
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Farina B, de Paola I, Russo L, Capasso D, Liguoro A, Gatto AD, Saviano M, Pedone PV, Di Gaetano S, Malgieri G, Zaccaro L, Fattorusso R. A Combined NMR and Computational Approach to Determine the RGDechi-hCit-αv β3 Integrin Recognition Mode in Isolated Cell Membranes. Chemistry 2015; 22:681-93. [PMID: 26548575 DOI: 10.1002/chem.201503126] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Indexed: 11/07/2022]
Abstract
The critical role of integrins in tumor progression and metastasis has stimulated intense efforts to identify pharmacological agents that can modulate integrin function. In recent years, αv β3 and αv β5 integrin antagonists were demonstrated to be effective in blocking tumor progression. RGDechi-hCit, a chimeric peptide containing a cyclic RGD motif linked to an echistatin C-terminal fragment, is able to recognize selectively αv β3 integrin both in vitro and in vivo. High-resolution molecular details of the selective αv β3 recognition of the peptide are certainly required, nonetheless RGDechi-hCit internalization limited the use of classical in cell NMR experiments. To overcome such limitations, we used WM266 isolated cellular membranes to accomplish a detailed NMR interaction study that, combined with a computational analysis, provides significant structural insights into αv β3 molecular recognition by RGDechi-hCit. Remarkably, on the basis of the identified molecular determinants, we design a RGDechi-hCit mutant that is selective for αv β5 integrin.
Collapse
Affiliation(s)
- Biancamaria Farina
- Dipatimento di Scienze e Tecnologie Ambientali, Biologiche e Farmaceutiche, Seconda Università degli Studi Napoli, Via Vivaldi 46, 81100, Caserta (Italy).,Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Naples (Italy)
| | - Ivan de Paola
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Naples (Italy)
| | - Luigi Russo
- Dipatimento di Scienze e Tecnologie Ambientali, Biologiche e Farmaceutiche, Seconda Università degli Studi Napoli, Via Vivaldi 46, 81100, Caserta (Italy)
| | - Domenica Capasso
- Dipartimento di Farmacia, Università di Napoli Federico II, Via Mezzocannone 16, 80134 Naples (Italy)
| | - Annamaria Liguoro
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Naples (Italy)
| | - Annarita Del Gatto
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Naples (Italy)
| | - Michele Saviano
- Istituto di Cristallografia, CNR, Via Amendola 122/O, 70126 Bari (Italy)
| | - Paolo V Pedone
- Dipatimento di Scienze e Tecnologie Ambientali, Biologiche e Farmaceutiche, Seconda Università degli Studi Napoli, Via Vivaldi 46, 81100, Caserta (Italy)
| | - Sonia Di Gaetano
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Naples (Italy)
| | - Gaetano Malgieri
- Dipatimento di Scienze e Tecnologie Ambientali, Biologiche e Farmaceutiche, Seconda Università degli Studi Napoli, Via Vivaldi 46, 81100, Caserta (Italy)
| | - Laura Zaccaro
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Naples (Italy).
| | - Roberto Fattorusso
- Dipatimento di Scienze e Tecnologie Ambientali, Biologiche e Farmaceutiche, Seconda Università degli Studi Napoli, Via Vivaldi 46, 81100, Caserta (Italy).
| |
Collapse
|
25
|
Sun MZ, Cui Y, Guo C, Zhao B, Liu S. rAdinbitor, a disintegrin from Agkistrodon halys brevicaudus stejneger, inhibits tumorigenicity of hepatocarcinoma via enhanced anti-angiogenesis and immunocompetence. Biochimie 2015; 116:34-42. [PMID: 26133656 DOI: 10.1016/j.biochi.2015.06.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 06/22/2015] [Indexed: 12/29/2022]
Abstract
Adinbitor is a disintegrin previously obtained from Agkistrodon halys brevicaudus stejneger by our group. Here, we investigated the in vitro and in vivo anti-tumor activities of recombinant Adinbitor (rAdinbitor). rAdinbitor stimulation can inhibit the in vitro proliferation, migration and invasion capacities of murine hepatocarcinoma H22 and Hca-F cells. The administrations of rAdinbitor either by gavage or intraperitoneal injection suppress the tumor malignancy and prolong the survival rate and time of H22-transplanted mice. The number and size of formed blood vessels decreased dramatically in tumorous tissues in that the expression levels of vascular endothelial growth factor (VEGF) and cluster of differentiation 34 (CD34) were significantly decreased in responding to rAdinbitor treatment. The protein levels of IL-18 and IgG increased significantly in the serum of H22-transplanted tumor mice with rAdinbitor treatment. rAdinbitor shows in vitro and in vivo anti-tumor effects as an angiogenesis inhibitor and immunocompetence enhancer.
Collapse
Affiliation(s)
- Ming-Zhong Sun
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China
| | - Yanhua Cui
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China
| | - Chunmei Guo
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China
| | - Baochang Zhao
- Department of Biotechnology, Dalian Medical University, Dalian, 116044, China
| | - Shuqing Liu
- Department of Biotechnology, Dalian Medical University, Dalian, 116044, China; Liaoning Provincial Core Lab of Cell and Molecular Biology, Dalian Medical University, Dalian 116044, China.
| |
Collapse
|
26
|
Capasso D, de Paola I, Liguoro A, Del Gatto A, Di Gaetano S, Guarnieri D, Saviano M, Zaccaro L. RGDechi-hCit: αvβ3 selective pro-apoptotic peptide as potential carrier for drug delivery into melanoma metastatic cells. PLoS One 2014; 9:e106441. [PMID: 25248000 PMCID: PMC4172472 DOI: 10.1371/journal.pone.0106441] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 07/30/2014] [Indexed: 02/07/2023] Open
Abstract
αvβ3 integrin is an important tumor marker widely expressed on the surface of cancer cells. Recently, we reported some biological features of RGDechi-hCit, an αvβ3 selective peptide antagonist. In the present work, we mainly investigated the pro-apoptotic activity of the molecule and its ability to penetrate the membrane of WM266 cells, human malignant melanoma cells expressing high levels of αvβ3 integrin. For the first time we demonstrated the pro-apoptotic effect and the ability of RGDechi-hCit to enter into cell overexpressing αvβ3 integrin mainly by clathrin- and caveolin-mediated endocytosis. Furthermore, we deepened and confirmed the selectivity, anti-adhesion, and anti-proliferative features of the peptide. Altogether these experiments give insight into the biological behavior of RGDechi-hCit and have important implications for the employment of the peptide as a new selective carrier to deliver drugs into the cell and as a therapeutic and diagnostic tool for metastatic melanoma. Moreover, since the peptide shows a pro-apoptotic effect, a great perspective could be the development of a new class of selective systems containing RGDechi-hCit and pro-apoptotic molecules or other therapeutic agents to attain a synergic action.
Collapse
Affiliation(s)
- Domenica Capasso
- Department of Pharmacy, University of Naples “Federico II”, Naples, Italy
| | - Ivan de Paola
- Institute of Biostructures and Bioimaging -CNR, Naples, Italy
| | | | | | | | - Daniela Guarnieri
- Center for Advanced Biomaterials for Health Care @ CRIB- Italian Institute of Technology, Naples, Italy
| | | | - Laura Zaccaro
- Institute of Biostructures and Bioimaging -CNR, Naples, Italy
- * E-mail:
| |
Collapse
|
27
|
Stubbs DJ, Yamamoto AK, Menon DK. Imaging in sepsis-associated encephalopathy--insights and opportunities. Nat Rev Neurol 2013; 9:551-61. [PMID: 23999468 DOI: 10.1038/nrneurol.2013.177] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Sepsis-associated encephalopathy (SAE) refers to a clinical spectrum of acute neurological dysfunction that arises in the context of sepsis. Although the pathophysiology of SAE is incompletely understood, it is thought to involve endothelial activation, blood-brain barrier leakage, inflammatory cell migration, and neuronal loss with neurotransmitter imbalance. SAE is associated with a high risk of mortality. Imaging studies using MRI and CT have demonstrated changes in the brains of patients with SAE that are also seen in disorders such as stroke. Next-generation imaging techniques such as magnetic resonance spectroscopy, diffusion tensor imaging and PET, as well as experimental imaging modalities, provide options for early identification of patients with SAE, and could aid in identification of pathophysiological processes that represent possible therapeutic targets. In this Review, we explore the recent literature on imaging in SAE, relating the findings of these studies to pathological data and experimental studies to obtain insights into the pathophysiology of sepsis-associated neurological dysfunction. Furthermore, we suggest how novel imaging technologies can be used for early-stage proof-of-concept and proof-of-mechanism translational studies, which may help to improve diagnosis in SAE.
Collapse
Affiliation(s)
- Daniel J Stubbs
- Division of Anaesthesia, Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge CB2 2QQ, UK
| | | | | |
Collapse
|
28
|
Ivanova VP, Kovaleva ZV, Anokhina VV, Krivchenko AI. The effect of a collagen tripeptide fragment (GER) on fibroblast adhesion and spreading depends on properties of an adhesive surface. ACTA ACUST UNITED AC 2013. [DOI: 10.1134/s1990519x13010057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
29
|
Near-infrared fluorescent divalent RGD ligand for integrin αvβ₃-targeted optical imaging. Bioorg Med Chem Lett 2012; 22:5405-9. [PMID: 22871580 DOI: 10.1016/j.bmcl.2012.07.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/10/2012] [Accepted: 07/12/2012] [Indexed: 11/20/2022]
Abstract
A new near-infrared fluorescent compound containing two cyclic RGD motifs, cypate-[c(RGDfK)](2) (1), was synthesized based on a carbocyanine fluorophore bearing two carboxylic acid groups (cypate) for integrin α(v)β(3)-targeting. Compared with its monovalent counterpart cypate-c(RGDfK) (2), 1 exhibited remarkable improvements in integrin α(v)β(3) binding affinity and tumor uptake in nude mice of A549. The results suggest that cypate-linked divalent ligands can serve as an important molecular platform for exploring receptor-targeted optical imaging and treatment of various diseases.
Collapse
|
30
|
Liu X, Cui W, Li B, Hong Z. Targeted therapy for glioma using cyclic RGD-entrapped polyionic complex nanomicelles. Int J Nanomedicine 2012; 7:2853-62. [PMID: 22745548 PMCID: PMC3383325 DOI: 10.2147/ijn.s29788] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND The purpose of this study was to test the efficacy of cyclic Arg-Gly-Asp (RGD) peptide conjugated with polyionic complex nanomicelles as targeted therapy for glioma. METHODS A stable cyclic RGD polyionic complex nanostructure, ie, a c(RGDfC) polyionic complex micelle, was synthesized and its biocompatibility with cultured neurons was assessed using a cell viability assay. Targeted binding to cultured glioma cells was evaluated by the CdTe quantum dot marking technique and a cell viability assay. The inhibitory effect of the nanomicelles against glioma cells was also evaluated, and their targeted migration into rat brain glioma cells and apoptotic effects were traced by the CdTe quantum dot marking and immunohistochemical staining. RESULTS c(RGDfC) polyionic complex micelles did not affect the growth of neurons but bonded selectively to and inhibited proliferation of glioma cells in vitro. When tested in vivo, the micelles migrated into glioma cells, inducing apoptosis in the rat brain. CONCLUSION The c(RGDfC) polyionic complex micelle is an effective targeted therapy against glioma.
Collapse
Affiliation(s)
- Xiaoying Liu
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University, Shanghai China.
| | | | | | | |
Collapse
|
31
|
Lu W, Melancon MP, Xiong C, Huang Q, Elliott A, Song S, Zhang R, Flores LG, Gelovani JG, Wang LV, Ku G, Stafford RJ, Li C. Effects of photoacoustic imaging and photothermal ablation therapy mediated by targeted hollow gold nanospheres in an orthotopic mouse xenograft model of glioma. Cancer Res 2011; 71:6116-21. [PMID: 21856744 DOI: 10.1158/0008-5472.can-10-4557] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Advancements in nanotechnology have made it possible to create multifunctional nanostructures that can be used simultaneously to image and treat cancers. For example, hollow gold nanospheres (HAuNS) have been shown to generate intense photoacoustic signals and induce efficient photothermal ablation (PTA) therapy. In this study, we used photoacoustic tomography, a hybrid imaging modality, to assess the intravenous delivery of HAuNS targeted to integrins that are overexpressed in both glioma and angiogenic blood vessels in a mouse model of glioma. Mice were then treated with near-infrared laser, which elevated tumor temperature by 20.7°C. We found that PTA treatment significantly prolonged the survival of tumor-bearing mice. Taken together, these results show the feasibility of using a single nanostructure for image-guided local tumor PTA therapy with photoacoustic molecular imaging.
Collapse
Affiliation(s)
- Wei Lu
- Department of Experimental Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Kim YH, Jeon J, Hong SH, Rhim WK, Lee YS, Youn H, Chung JK, Lee MC, Lee DS, Kang KW, Nam JM. Tumor targeting and imaging using cyclic RGD-PEGylated gold nanoparticle probes with directly conjugated iodine-125. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:2052-60. [PMID: 21688390 DOI: 10.1002/smll.201100927] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Indexed: 05/23/2023]
Abstract
Radioactive iodine-labeled, cyclic RGD-PEGylated gold nanoparticle (AuNP) probes are designed and synthesized for targeting cancer cells and imaging tumor sites. These iodine-125-labeled cRGD-PEG-AuNP probes are stable in various conditions including a range of pHs and high salt and temperature conditions. These probes can target selectively and be taken up by tumor cells via integrin αvβ3-receptor-mediated endocytosis with no cytotoxicity. The probes show a significant increase in the avidity of αvβ3 integrin compared to the corresponding free cRGD peptides. In-vivo SPECT/CT imaging results show that the iodine-125-labeled cRGD-PEG-AuNP probes can target the tumor site as soon as 10 min after injection, and also that cyclic RGD peptides are needed for efficient and long-term in-vivo monitoring. The results suggest that the probes circulate through the whole body, including renal filtration, and are excretable. These promising results show that radioactive-iodine-labeled gold nanoprobes have potential for highly specific and sensitive tumor imaging or for use as angiogenesis-targeted SPECT/CT imaging probes.
Collapse
Affiliation(s)
- Young-Hwa Kim
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 110-744, South Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
|
34
|
Ma D, Xu X, An S, Liu H, Yang X, Andersen JF, Wang Y, Tokumasu F, Ribeiro JMC, Francischetti IMB, Lai R. A novel family of RGD-containing disintegrins (Tablysin-15) from the salivary gland of the horsefly Tabanus yao targets αIIbβ3 or αVβ3 and inhibits platelet aggregation and angiogenesis. Thromb Haemost 2011; 105:1032-45. [PMID: 21475772 DOI: 10.1160/th11-01-0029] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 02/08/2011] [Indexed: 11/05/2022]
Abstract
A novel family of RGD-containing molecules (Tablysin-15) has been molecularly characterised from the salivary gland of the haematophagous horsefly Tabanus yao. Tablysin-15 does not share primary sequence homology to any disintegrin discovered so far, and displays an RGD motif in the N-terminus of the molecule. It is also distinct from disintegrins from Viperidae since its mature form is not released from a metalloproteinase precursor. Tablysin-15 exhibits high affinity binding for platelet αIIbβ3 and endothelial cell αVβ3 integrins, but not for α5β1 or α2β1. Accordingly, it blocks endothelial cell adhesion to vitronectin (IC50 ~1 nM) and marginally to fibronectin (IC50 ~1 μM), but not to collagen. It also inhibits fibroblast growth factor (FGF)-induced endothelial cell proliferation, and attenuates tube formation in vitro. In platelets, Tablysin-15 inhibits aggregation induced by collagen, ADP and convulxin, and prevents static platelet adhesion to immobilised fibrinogen. In addition, solid-phase assays and flow cytometry demonstrates that αIIbβ3 binds to Tablysin-15. Moreover, immobilised Tablysin-15 supports platelet adhesion by a mechanism which was blocked by anti-integrin αIIbβ3 monoclonal antibody (e.g. abciximab) or by EDTA. Furthermore, Tablysin-15 dose-dependently attenuates thrombus formation to collagen under flow. Consistent with these findings, Tablysin-15 displays antithrombotic properties in vivo suggesting that it is a useful tool to block αIIbβ3, or as a prototype to develop antithrombotics. The RGD motif in the unique sequence of Tablysin-15 represents a novel template for studying the structure-function relationship of the disintegrin family of inhibitors.
Collapse
Affiliation(s)
- D Ma
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, Yunnan, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Del Vecchio S, Zannetti A, Fonti R, Iommelli F, Pizzuti LM, Lettieri A, Salvatore M. PET/CT in cancer research: from preclinical to clinical applications. CONTRAST MEDIA & MOLECULAR IMAGING 2011; 5:190-200. [PMID: 20812287 DOI: 10.1002/cmmi.368] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The identification of genetic and biochemical mechanisms underlying tumor growth and progression along with the unraveling of human genoma provided a plethora of new targets for cancer detection, treatment and monitoring. Simultaneously, the extraordinary development of a number of imaging technologies, including hybrid systems, allowed the visualization of biochemical, molecular and physiological aberrations linked to underlying mutations in a given tumor. In vivo evaluation of complex biological processes such as proliferation, apoptosis, angiogenesis, metastasis, gene expression, receptor-ligand interactions, transport of substrates and metabolism of nutrients in human cancers is feasible using PET/CT and radiolabeled molecular probes. Some of these compounds are in preclinical phases of evaluation whereas others have been already applied in clinical settings. Here we provide prominent examples on how some biological processes and target expression can be visualized by PET/CT in animal tumor models and cancer patients for the noninvasive detection of well-known markers of tumor aggressiveness, invasiveness and resistance to treatment and for the evaluation of tumor response to therapy.
Collapse
Affiliation(s)
- S Del Vecchio
- Department of Biomorphological and Functional Sciences, University of Naples Federico II, Naples, Italy.
| | | | | | | | | | | | | |
Collapse
|
36
|
Jin ZH, Furukawa T, Galibert M, Boturyn D, Coll JL, Fukumura T, Saga T, Dumy P, Fujibayashi Y. Noninvasive visualization and quantification of tumor αVβ3 integrin expression using a novel positron emission tomography probe, 64Cu-cyclam-RAFT-c(-RGDfK-)4. Nucl Med Biol 2011; 38:529-40. [PMID: 21531290 DOI: 10.1016/j.nucmedbio.2010.11.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 11/01/2010] [Accepted: 11/11/2010] [Indexed: 11/27/2022]
Abstract
INTRODUCTION The α(V)β(3) integrin is a well-known transmembrane receptor involved in tumor invasion, angiogenesis and metastasis. Our aim was to evaluate a novel positron emission tomography (PET) probe, (64)Cu-cyclam-RAFT-c(-RGDfK-)(4), for noninvasive visualization and quantification of α(V)β(3) integrin expression. METHODS RAFT-c(-RGDfK-)(4), a tetrameric cyclic Arg-Gly-Asp (RGD)-based peptide, was conjugated with a bifunctional chelator, 1,4,8,11-tetraazacyclotetradecane (cyclam), radiolabeled with the positron emitter (64)Cu and evaluated in vitro by cell binding and competitive inhibition assays and in vivo by biodistribution and receptor blocking studies, and PET imaging. The following cell lines, human embryonic kidney HEK293(β(1)) [α(V)β(3)-negative] and HEK293(β(3)) [α(V)β(3)-overexpressing] and human glioblastoma U87MG [naturally expressing α(V)β(3)], together with their subcutaneous xenografts in athymic nude mice, were used for the present study. The expression levels of α(V)β(3) on these cell lines and tumor xenografts were analyzed by flow cytometry and sodium dodecyl sulfate-polyacrylamide gel electrophoresis/autoradiography, respectively. RESULTS (64)Cu-cyclam-RAFT-c(-RGDfK-)(4) demonstrated the in vitro and in vivo specificity for the α(V)β(3) integrin and displayed rapid blood clearance, predominantly renal excretion and low uptake in nontumor tissues. Tumor uptake of (64)Cu-cyclam-RAFT-c(-RGDfK-)(4) (3 h postinjection) in HEK293(β(3)) (high levels of α(V)β(3)), U87MG (moderate levels of α(V)β(3)) and HEK293(β(1)) (undetectable levels of α(V)β(3)) tumors was 9.35%±1.19%, 3.46%±0.45% and 1.18%±0.30% injected dose per gram, respectively, with a strong and positive correlation with the tumor α(V)β(3) expression levels (correlation coefficient=0.967; P<.0001). Positron emission tomographic images showed that α(V)β(3)-positive tumors were clearly visualized with high tumor-to-background contrast, and agreed well with the biodistribution results. CONCLUSION (64)Cu-cyclam-RAFT-c(-RGDfK-)(4) exhibits potential for noninvasively quantifying α(V)β(3) expression.
Collapse
Affiliation(s)
- Zhao-Hui Jin
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Santulli G, Basilicata MF, De Simone M, Del Giudice C, Anastasio A, Sorriento D, Saviano M, Del Gatto A, Trimarco B, Pedone C, Zaccaro L, Iaccarino G. Evaluation of the anti-angiogenic properties of the new selective αVβ3 integrin antagonist RGDechiHCit. J Transl Med 2011; 9:7. [PMID: 21232121 PMCID: PMC3027097 DOI: 10.1186/1479-5876-9-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Accepted: 01/13/2011] [Indexed: 01/30/2023] Open
Abstract
Background Integrins are heterodimeric receptors that play a critical role in cell-cell and cell-matrix adhesion processes. Among them, αVβ3 integrin, that recognizes the aminoacidic RGD triad, is reported to be involved in angiogenesis, tissue repair and tumor growth. We have recently synthesized a new and selective ligand of αVβ3 receptor, referred to as RGDechiHCit, that contains a cyclic RGD motif and two echistatin moieties. Methods The aim of this study is to evaluate in vitro and in vivo the effects of RGDechiHCit. Therefore, we assessed its properties in cellular (endothelial cells [EC], and vascular smooth muscle cells [VSMC]) and animal models (Wistar Kyoto rats and c57Bl/6 mice) of angiogenesis. Results In EC, but not VSMC, RGDechiHCit inhibits intracellular mitogenic signaling and cell proliferation. Furthermore, RGDechiHCit blocks the ability of EC to form tubes on Matrigel. In vivo, wound healing is delayed in presence of RGDechiHCit. Similarly, Matrigel plugs demonstrate an antiangiogenic effect of RGDechiHCit. Conclusions Our data indicate the importance of RGDechiHCit in the selective inhibition of endothelial αVβ3 integrin in vitro and in vivo. Such inhibition opens new fields of investigation on the mechanisms of angiogenesis, offering clinical implications for treatment of pathophysiological conditions such as cancer, proliferative retinopathy and inflammatory disease.
Collapse
Affiliation(s)
- Gaetano Santulli
- Department of Clinical Medicine, Cardiovascular & Immunologic Sciences, Federico II University of Naples, Italy.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Fabricius EM, Wildner GP, Kruse-Boitschenko U, Hoffmeister B, Goodman SL, Raguse JD. Immunohistochemical analysis of integrins αvβ3, αvβ5 and α5β1, and their ligands, fibrinogen, fibronectin, osteopontin and vitronectin, in frozen sections of human oral head and neck squamous cell carcinomas. Exp Ther Med 2010; 2:9-19. [PMID: 22977464 DOI: 10.3892/etm.2010.171] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2010] [Accepted: 11/10/2010] [Indexed: 11/05/2022] Open
Abstract
Integrins mediate the interaction of cells with the extracellular matrix and are believed to be involved in tumor cell survival and metastasis, and in tumor angiogenesis. We used immunohistochemistry of fresh-frozen human tumor tissues to analyze the presence of integrins αvβ3, αvβ5 and α5β1, which are believed to be involved in tumor growth and migration, together with integrin ligands, vitronectin, osteopontin, fibronectin and fibrinogen, in human oral squamous cell carcinomas. Samples of squamous cell carcinomas and control tissues from patients without cancer undergoing oral or maxillofacial surgery were frozen in liquid nitrogen within 30 min of removal. Frozen sections were prepared, and the presence of integrins or ligands was visualized using standard immunohistochemistry (APAAP) with a blinded evaluation. Comparison of samples from the 40 oral cancer patients and the 20 controls revealed increased staining in tumors compared with the controls, and staining was demonstrated for αvβ3 in endothelia. αvβ5 staining was increased in the tumor samples, but this was associated with increased expression in stroma rather than in endothelia. Modestly increased expression of α5β1 was observed in the tumor samples, and this was associated with tumor cells, endothelia and stroma. Expression of ligands for the integrins varied between tissue types, with increased fibrinogen and fibronectin expression in tumor endothelia. Confirmation of the presence of these integrins and their association with tumor cells, endothelia or stroma suggests their potential for these integrins in human oral tumors. Overall, the increased expression of integrins within tumors, particularly expression associated with endothelial cells, supports the principle of selective integrin blockade as a novel anticancer strategy.
Collapse
Affiliation(s)
- Eva-Maria Fabricius
- Clinic for Oral and Maxillofacial Surgery, Campus Virchow Hospital Charité-Universitätsmedizin
| | | | | | | | | | | |
Collapse
|
39
|
Monfregola L, Saviano M, De Luca S. Synthesis and Characterization of a Selective Alpha(v)Beta(3) Receptor Cyclic Peptide Antagonist Functionalized with a Chelating Group for Metal Labelling. Int J Pept Res Ther 2009. [DOI: 10.1007/s10989-009-9195-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|