1
|
Kim H, Taslakjian B, Kim S, Tirrell MV, Guler MO. Therapeutic Peptides, Proteins and their Nanostructures for Drug Delivery and Precision Medicine. Chembiochem 2024; 25:e202300831. [PMID: 38408302 DOI: 10.1002/cbic.202300831] [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: 12/08/2023] [Revised: 02/05/2024] [Accepted: 02/22/2024] [Indexed: 02/28/2024]
Abstract
Peptide and protein nanostructures with tunable structural features, multifunctionality, biocompatibility and biomolecular recognition capacity enable development of efficient targeted drug delivery tools for precision medicine applications. In this review article, we present various techniques employed for the synthesis and self-assembly of peptides and proteins into nanostructures. We discuss design strategies utilized to enhance their stability, drug-loading capacity, and controlled release properties, in addition to the mechanisms by which peptide nanostructures interact with target cells, including receptor-mediated endocytosis and cell-penetrating capabilities. We also explore the potential of peptide and protein nanostructures for precision medicine, focusing on applications in personalized therapies and disease-specific targeting for diagnostics and therapeutics in diseases such as cancer.
Collapse
Affiliation(s)
- HaRam Kim
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Boghos Taslakjian
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Sarah Kim
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Matthew V Tirrell
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Mustafa O Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| |
Collapse
|
2
|
AghaAmiri S, Ghosh SC, Hernandez Vargas S, Halperin DM, Azhdarinia A. Somatostatin Receptor Subtype-2 Targeting System for Specific Delivery of Temozolomide. J Med Chem 2024; 67:2425-2437. [PMID: 38346097 PMCID: PMC10896214 DOI: 10.1021/acs.jmedchem.3c00223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 12/04/2023] [Accepted: 12/12/2023] [Indexed: 02/23/2024]
Abstract
Temozolomide (TMZ) is a DNA alkylating agent that produces objective responses in patients with neuroendocrine tumors (NETs) when the DNA repair enzyme O6-methylguanine-DNA methyltransferase (MGMT) is inactivated. At high doses, TMZ therapy exhausts MGMT activity but also produces dose-limiting toxicities. To reduce off-target effects, we converted the clinically approved radiotracer 68Ga-DOTA-TOC into a peptide-drug conjugate (PDC) for targeted delivery of TMZ to somatostatin receptor subtype-2 (SSTR2)-positive tumor cells. We used an integrated radiolabeling strategy for direct quantitative assessment of receptor binding, pharmacokinetics, and tissue biodistribution. In vitro studies revealed selective binding to SSTR2-positive cells with high affinity (5.98 ± 0.96 nmol/L), internalization, receptor-dependent DNA damage, cytotoxicity, and MGMT depletion. Imaging and biodistribution analysis showed preferential accumulation of the PDC in receptor-positive tumors and high renal clearance. This study identified a trackable SSTR2-targeting system for TMZ delivery and utilizes a modular design that could be broadly applied in PDC development.
Collapse
Affiliation(s)
- Solmaz AghaAmiri
- The Brown Foundation Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, 1881 East Road, 3SCR6.4680, Houston, Texas 77054, United States
| | - Sukhen C Ghosh
- The Brown Foundation Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, 1881 East Road, 3SCR6.4680, Houston, Texas 77054, United States
| | - Servando Hernandez Vargas
- The Brown Foundation Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, 1881 East Road, 3SCR6.4680, Houston, Texas 77054, United States
| | - Daniel M Halperin
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Ali Azhdarinia
- The Brown Foundation Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, 1881 East Road, 3SCR6.4680, Houston, Texas 77054, United States
| |
Collapse
|
3
|
Si Y, Kim S, Ou J, Lu Y, Ernst P, Chen K, Whitt J, Carter AM, Markert JM, Bibb JA, Chen H, Zhou L, Jaskula-Sztul R, Liu XM. Anti-SSTR2 antibody-drug conjugate for neuroendocrine tumor therapy. Cancer Gene Ther 2021; 28:799-812. [PMID: 32684623 PMCID: PMC7854894 DOI: 10.1038/s41417-020-0196-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/18/2020] [Accepted: 06/24/2020] [Indexed: 12/13/2022]
Abstract
Neuroendocrine (NE) tumors include a diverse spectrum of hormone-secreting neoplasms that arise from the endocrine and nervous systems. Current chemo- and radio-therapies have marginal curative benefits. The goal of this study was to develop an innovative antibody-drug conjugate (ADC) to effectively treat NE tumors (NETs). First, we confirmed that somatostatin receptor 2 (SSTR2) is an ideal cancer cell surface target by analyzing 38 patient-derived NET tissues, 33 normal organs, and three NET cell lines. Then, we developed a new monoclonal antibody (mAb, IgG1, and kappa) to target two extracellular domains of SSTR2, which showed strong and specific surface binding to NETs. The ADC was constructed by conjugating the anti-SSTR2 mAb and antimitotic monomethyl auristatin E. In vitro evaluations indicated that the ADC can effectively bind, internalize, release payload, and kill NET cells. Finally, the ADC was evaluated in vivo using a NET xenograft mouse model to assess cancer-specific targeting, tolerated dosage, pharmacokinetics, and antitumor efficacy. The anti-SSTR2 ADC exclusively targeted and killed NET cells with minimal toxicity and high stability in vivo. This study demonstrates that the anti-SSTR2 ADC has a high-therapeutic potential for NET therapy.
Collapse
Affiliation(s)
- Yingnan Si
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Seulhee Kim
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Jianfa Ou
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Yun Lu
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Patrick Ernst
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Kai Chen
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Jason Whitt
- Department of Surgery, UAB, 1808 7th Avenue South, Birmingham, AL, 35294, USA
| | - Angela M Carter
- Department of Surgery, UAB, 1808 7th Avenue South, Birmingham, AL, 35294, USA
| | - James M Markert
- Department of Neurosurgery, UAB, 510 20th Street South, Birmingham, AL, 35294, USA
- O'Neal Comprehensive Cancer Center, UAB, 1824 6th Avenue South, Birmingham, AL, 35233, USA
| | - James A Bibb
- Department of Surgery, UAB, 1808 7th Avenue South, Birmingham, AL, 35294, USA
- O'Neal Comprehensive Cancer Center, UAB, 1824 6th Avenue South, Birmingham, AL, 35233, USA
| | - Herbert Chen
- Department of Surgery, UAB, 1808 7th Avenue South, Birmingham, AL, 35294, USA
- O'Neal Comprehensive Cancer Center, UAB, 1824 6th Avenue South, Birmingham, AL, 35233, USA
| | - Lufang Zhou
- Department of Medicine, UAB, 703 19th Street South, Birmingham, AL, 35294, USA
| | - Renata Jaskula-Sztul
- Department of Surgery, UAB, 1808 7th Avenue South, Birmingham, AL, 35294, USA.
- O'Neal Comprehensive Cancer Center, UAB, 1824 6th Avenue South, Birmingham, AL, 35233, USA.
| | - Xiaoguang Margaret Liu
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), 1825 University Blvd, Birmingham, AL, 35294, USA.
- O'Neal Comprehensive Cancer Center, UAB, 1824 6th Avenue South, Birmingham, AL, 35233, USA.
| |
Collapse
|
4
|
Alas M, Saghaeidehkordi A, Kaur K. Peptide-Drug Conjugates with Different Linkers for Cancer Therapy. J Med Chem 2020; 64:216-232. [PMID: 33382619 DOI: 10.1021/acs.jmedchem.0c01530] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Drug conjugates are chemotherapeutic or cytotoxic agents covalently linked to targeting ligands such as an antibody or a peptide via a linker. While antibody-drug conjugates (ADCs) are now clinically established for cancer therapy, peptide-drug conjugates (PDCs) are gaining recognition as a new modality for targeted drug delivery with improved efficacy and reduced side effects for cancer treatment. The linker in a drug conjugate plays a key role in the circulation time of the conjugate and release of the drug for full activity at the target site. Herein, we highlight the main linker chemistries utilized in the design of PDCs and discuss representative examples of PDCs with different linker chemistries with the related outcome in cell and animal studies.
Collapse
Affiliation(s)
- Mona Alas
- Chapman University School of Pharmacy (CUSP), Harry and Diane Rinker Health Science Campus, Chapman University, Irvine, California 92618-1908, United States
| | - Azam Saghaeidehkordi
- Chapman University School of Pharmacy (CUSP), Harry and Diane Rinker Health Science Campus, Chapman University, Irvine, California 92618-1908, United States
| | - Kamaljit Kaur
- Chapman University School of Pharmacy (CUSP), Harry and Diane Rinker Health Science Campus, Chapman University, Irvine, California 92618-1908, United States
| |
Collapse
|
5
|
Kim H, Hwang D, Choi M, Lee S, Kang S, Lee Y, Kim S, Chung J, Jon S. Antibody-Assisted Delivery of a Peptide-Drug Conjugate for Targeted Cancer Therapy. Mol Pharm 2018; 16:165-172. [PMID: 30521347 DOI: 10.1021/acs.molpharmaceut.8b00924] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A number of cancer-targeting peptide-drug conjugates (PDCs) have been explored as alternatives to antibody-drug conjugates (ADCs) for targeted cancer therapy. However, the much shorter circulation half-life of PDCs compared with ADCs in vivo has limited their therapeutic value and thus their translation into the clinic, highlighting the need to develop new approaches for extending the half-life of PDCs. Here, we report a new strategy for targeted cancer therapy of a PDC based on a molecular hybrid between an antihapten antibody and a hapten-labeled PDC. An anticotinine antibody (Abcot) was used as a model antihapten antibody. The anticancer drug SN38 was linked to a cotinine-labeled aptide specific to extra domain B of fibronectin (cot-APTEDB), yielding the model PDC, cot-APTEDB-SN38. The cotinine-labeled PDC showed specific binding to and cytotoxicity toward an EDB-overexpressing human glioblastoma cell line (U87MG) and also formed a hybrid complex (HC) with Abcot in situ, designated HC[cot-APTEDB-SN38/Abcot]. In glioblastoma-bearing mice, in situ HC[cot-APTEDB-SN38/Abcot] significantly extended the circulation half-life of cot-APTEDB-SN38 in blood, and it enhanced accumulation and penetration within the tumor and, ultimately, inhibition of tumor growth. These findings suggest that the present platform holds promise as a new, targeted delivery strategy for PDCs in anticancer therapy.
Collapse
Affiliation(s)
- Hyungjun Kim
- KAIST Institute for the BioCentury, Department of Biological Sciences , Korea Advanced Institute of Science and Technology , 291 Daehak-ro , Daejeon 34141 , Republic of Korea
| | - Dobeen Hwang
- Department of Biochemistry and Molecular Biology , Seoul National University College of Medicine , 103 Daehak-ro , Seoul 03080 , Republic of Korea
| | - Minsuk Choi
- KAIST Institute for the BioCentury, Department of Biological Sciences , Korea Advanced Institute of Science and Technology , 291 Daehak-ro , Daejeon 34141 , Republic of Korea
| | - Soyoung Lee
- KAIST Institute for the BioCentury, Department of Biological Sciences , Korea Advanced Institute of Science and Technology , 291 Daehak-ro , Daejeon 34141 , Republic of Korea
| | - Sukmo Kang
- KAIST Institute for the BioCentury, Department of Biological Sciences , Korea Advanced Institute of Science and Technology , 291 Daehak-ro , Daejeon 34141 , Republic of Korea
| | - Yonghyun Lee
- KAIST Institute for the BioCentury, Department of Biological Sciences , Korea Advanced Institute of Science and Technology , 291 Daehak-ro , Daejeon 34141 , Republic of Korea
| | - Sunghyun Kim
- Center for Convergence Bioceramic Materials , Korea Institute of Ceramic Engineering and Technology , 202 Osongsaengmyeong 1-ro , Cheongju 28160 , Republic of Korea
| | - Junho Chung
- Department of Biochemistry and Molecular Biology , Seoul National University College of Medicine , 103 Daehak-ro , Seoul 03080 , Republic of Korea
| | - Sangyong Jon
- KAIST Institute for the BioCentury, Department of Biological Sciences , Korea Advanced Institute of Science and Technology , 291 Daehak-ro , Daejeon 34141 , Republic of Korea
| |
Collapse
|
6
|
Ragozin E, Hesin A, Bazylevich A, Tuchinsky H, Bovina A, Shekhter Zahavi T, Oron-Herman M, Kostenich G, Firer M, Rubinek T, Wolf I, Luboshits G, Sherman M, Gellerman G. New somatostatin-drug conjugates for effective targeting pancreatic cancer. Bioorg Med Chem 2018; 26:3825-3836. [DOI: 10.1016/j.bmc.2018.06.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/14/2018] [Accepted: 06/24/2018] [Indexed: 12/15/2022]
|
7
|
Vrettos EI, Mező G, Tzakos AG. On the design principles of peptide-drug conjugates for targeted drug delivery to the malignant tumor site. Beilstein J Org Chem 2018; 14:930-954. [PMID: 29765474 PMCID: PMC5942387 DOI: 10.3762/bjoc.14.80] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/04/2018] [Indexed: 12/30/2022] Open
Abstract
Cancer is the second leading cause of death affecting nearly one in two people, and the appearance of new cases is projected to rise by >70% by 2030. To effectively combat the menace of cancer, a variety of strategies have been exploited. Among them, the development of peptide–drug conjugates (PDCs) is considered as an inextricable part of this armamentarium and is continuously explored as a viable approach to target malignant tumors. The general architecture of PDCs consists of three building blocks: the tumor-homing peptide, the cytotoxic agent and the biodegradable connecting linker. The aim of the current review is to provide a spherical perspective on the basic principles governing PDCs, as also the methodology to construct them. We aim to offer basic and integral knowledge on the rational design towards the construction of PDCs through analyzing each building block, as also to highlight the overall progress of this rapidly growing field. Therefore, we focus on several intriguing examples from the recent literature, including important PDCs that have progressed to phase III clinical trials. Last, we address possible difficulties that may emerge during the synthesis of PDCs, as also report ways to overcome them.
Collapse
Affiliation(s)
- Eirinaios I Vrettos
- University of Ioannina, Department of Chemistry, Section of Organic Chemistry and Biochemistry, Ioannina, GR-45110, Greece
| | - Gábor Mező
- Eötvös Loránd University, Faculty of Science, Institute of Chemistry, Pázmány P. stny. 1/A, H-1117 Budapest, Hungary.,MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Pázmány P. stny. 1/A, H-1117 Budapest, Hungary
| | - Andreas G Tzakos
- University of Ioannina, Department of Chemistry, Section of Organic Chemistry and Biochemistry, Ioannina, GR-45110, Greece
| |
Collapse
|
8
|
Gilad Y, Firer M, Gellerman G. Recent Innovations in Peptide Based Targeted Drug Delivery to Cancer Cells. Biomedicines 2016; 4:E11. [PMID: 28536378 PMCID: PMC5344250 DOI: 10.3390/biomedicines4020011] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 05/16/2016] [Accepted: 05/23/2016] [Indexed: 12/21/2022] Open
Abstract
Targeted delivery of chemotherapeutics and diagnostic agents conjugated to carrier ligands has made significant progress in recent years, both in regards to the structural design of the conjugates and their biological effectiveness. The goal of targeting specific cell surface receptors through structural compatibility has encouraged the use of peptides as highly specific carriers as short peptides are usually non-antigenic, are structurally simple and synthetically diverse. Recent years have seen many developments in the field of peptide based drug conjugates (PDCs), particularly for cancer therapy, as their use aims to bypass off-target side-effects, reducing the morbidity common to conventional chemotherapy. However, no PDCs have as yet obtained regulatory approval. In this review, we describe the evolution of the peptide-based strategy for targeted delivery of chemotherapeutics and discuss recent innovations in the arena that should lead in the near future to their clinical application.
Collapse
Affiliation(s)
- Yosi Gilad
- Department of Chemical Sciences, Ariel University, Ariel 40700, Israel.
- Department of Chemical Engineering and Biotechnology, Ariel University, Ariel 40700, Israel.
| | - Michael Firer
- Department of Chemical Engineering and Biotechnology, Ariel University, Ariel 40700, Israel.
| | - Gary Gellerman
- Department of Chemical Sciences, Ariel University, Ariel 40700, Israel.
| |
Collapse
|
9
|
Redko B, Ragozin E, Andreii B, Helena T, Amnon A, Talia SZ, Mor OH, Genady K, Gary G. Synthesis, drug release, and biological evaluation of new anticancer drug-bioconjugates containing somatostatin backbone cyclic analog as a targeting moiety. Biopolymers 2015; 104:743-52. [DOI: 10.1002/bip.22694] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/12/2015] [Accepted: 05/27/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Boris Redko
- Department of Biological Chemistry; Ariel University; Ariel 40700 Israel
- Department of Chemistry; The Julius Spokojny Bioorganic Chemistry Laboratory; Bar Ilan University; Ramat Gan 52900 Israel
| | - Elena Ragozin
- Department of Biological Chemistry; Ariel University; Ariel 40700 Israel
| | - Bazylevich Andreii
- Department of Biological Chemistry; Ariel University; Ariel 40700 Israel
| | - Tuchinsky Helena
- Department of Molecular Biology; Ariel University; Ariel 40700 Israel
| | - Albeck Amnon
- Department of Chemistry; The Julius Spokojny Bioorganic Chemistry Laboratory; Bar Ilan University; Ramat Gan 52900 Israel
| | - Shekhter Zahavi Talia
- Department of Molecular Microbiology and Biotechnology; George S. Wise Faculty of Life Sciences; Tel-Aviv University; Tel-Aviv 69978 Israel
| | - Oron-Herman Mor
- The Advanced Technologies Center; Sheba Medical Center; Tel Hashomer 52621 Israel
| | - Kostenich Genady
- The Advanced Technologies Center; Sheba Medical Center; Tel Hashomer 52621 Israel
| | - Gellerman Gary
- Department of Biological Chemistry; Ariel University; Ariel 40700 Israel
| |
Collapse
|
10
|
Böhme D, Beck-Sickinger AG. Drug delivery and release systems for targeted tumor therapy. J Pept Sci 2015; 21:186-200. [PMID: 25703117 DOI: 10.1002/psc.2753] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 12/19/2014] [Accepted: 12/19/2014] [Indexed: 12/11/2022]
Abstract
Most toxic agents currently used for chemotherapy show a narrow therapeutic window, because of their inability to distinguish between healthy and cancer cells. Targeted drug delivery offers the possibility to overcome this issue by selectively addressing structures on the surface of cancer cells, therefore reducing undesired side effects. In this broad field, peptide-drug conjugates linked by intracellular cleavable structures have evolved as highly promising agents. They can specifically deliver toxophores to tumor cells by targeting distinct receptors overexpressed in cancer. In this review, we focus on these compounds and describe important factors to develop a highly efficient peptide-drug conjugate. The necessary properties of tumor-targeting peptides are described, and the different options for cleavable linkers used to connect toxic agents and peptides are discussed, and synthetic considerations for the introduction of these structures are reported. Furthermore, recent examples and current developments of peptide-drug conjugates are critically evaluated with a special focus on the applied linker structures and their future use in cancer therapy.
Collapse
Affiliation(s)
- David Böhme
- Institute of Biochemistry, Universität Leipzig, Brüderstraße 34, 04103, Leipzig, Germany
| | | |
Collapse
|
11
|
Krall N, Scheuermann J, Neri D. Small Targeted Cytotoxics: Current State and Promises from DNA-Encoded Chemical Libraries. Angew Chem Int Ed Engl 2013; 52:1384-402. [DOI: 10.1002/anie.201204631] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Indexed: 01/06/2023]
|
12
|
Krall N, Scheuermann J, Neri D. Entwicklung zielgerichteter niedermolekularer zytotoxischer Wirkstoffverbindungen mit DNA-codierten chemischen Bibliotheken. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201204631] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
13
|
Sun L, Luo J, Mackey LV, Morris LM, Franko-Tobin LG, LePage KT, Coy DH. Investigation of cancer cell lines for peptide receptor-targeted drug development. J Drug Target 2012; 19:719-30. [PMID: 21830941 DOI: 10.3109/1061186x.2011.558089] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Many tumors highly express specific populations of G-protein-coupled receptors (GPCRs) that could be utilized for receptor-targeted therapy. We confirmed significant quantities of mRNAs specific for certain somatostatin (SST), vasoactive intestinal peptide (VIP), and bombesin (BN) receptors in various commercially available tumor cell lines. Very few of the tumor cell lines examined displayed the high receptor-binding affinity despite exhibiting the expression of appropriate mRNAs and proteins of the cognate receptors. However, binding assays establish that some tumor cell lines, such as pancreatic cancer CFPAC-1, prostate cancer DU-145, and pancreatic carcinoid BON, demonstrate high BN receptor binding. BON cells also demonstrate high somatostatin receptor (SSTR) affinity binding. We also found that tumor cell lines, such as BON and host cells expressing SST receptor subtypes 1 or 2 (CHO-R1 or CHO-R2), underwent a decrease in cell surface receptor density in multiple passages. BON and CHO-R2 cells also rapidly internalize a significant proportion of cell surface ligand-receptor complexes. The tumor cells CFPAC-1, DU-145, and BON with high receptor binding could be useful for peptide drug studies. BON cells were further applied to test SST/BN analogs and cytotoxic conjugates. Furthermore, the in vivo antitumor assay showed that the cytotoxic conjugate CPT-SST targeting all SSTR subtypes displayed a potent tumor-suppressive ability to BON tumors expressing multiple SSTR subtypes.
Collapse
Affiliation(s)
- Lichun Sun
- Department of Medicine, Peptide Research Laboratories, Tulane Health Sciences Center , New Orleans, LA 70112-2699, USA.
| | | | | | | | | | | | | |
Collapse
|
14
|
Etienne MA, Kostochka M, Fuselier JA, Coy DH. Synthesis of camptothecin–amino acid carbamate linkers. Amino Acids 2011; 42:1727-33. [DOI: 10.1007/s00726-011-0884-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 03/05/2011] [Indexed: 11/30/2022]
|
15
|
Sun L, Morris LM, Luo J, Mackey LV, Leslie JS, Franko-Tobin LG, Fuselier JA, LePage KT, Coy DH. Application of human pancreatic carcinoid BON cells for receptor-targeted drug development. J Drug Target 2010; 19:666-74. [PMID: 21083509 DOI: 10.3109/1061186x.2010.531728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In our previous study, we found that several tumor cell lines displayed high receptor-specific binding affinity, one of which, the human pancreatic carcinoid BON cell line, demonstrates high affinity binding of the bombesin (BN) and somatostatin (SST) receptor-specific ligands. In the present study, BON cells, as a representative model, were further applied to evaluate various peptide analogs and cytotoxic receptor-targeted peptide conjugates. We observed quick ligand-receptor internalization in BON cells as well as high binding affinity. Furthermore, BON cells have high expression of multidrug resistance-associated genes (MDR1) and show camptothecin (CPT) resistance. Various receptor-specific cytotoxic conjugates were synthesized and evaluated in the BON cell model via in vitro and in vivo studies. We found that all the tested conjugates displayed potent antitumor ability in xenografts. Especially, the CPT conjugates, CPT-SST, and CPT-BN, are most likely to increase sensitivity to CPT-resistant BON cells. Our findings suggest that appropriately defined tumor cell lines may provide physiologically relevant cell-based evaluations of novel peptide analogs and receptor-targeted chemotherapeutics.
Collapse
Affiliation(s)
- Lichun Sun
- Department of Medicine, Peptide Research Laboratories, Tulane Health Sciences Center, New Orleans, LA 70112-2699, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Abstract
IMPORTANCE OF THE FIELD Tumor targeting with peptides is based on the discovery that receptors for many regulatory peptides are overexpressed in tumor cells, compared with their expression in normal tissues. Consequently, these peptides and their analogues can be used as carriers/targeting moieties for the preparation of diagnostic and therapeutic agents that have increased selectivity and decreased peripheral toxicity. AREAS COVERED IN THIS REVIEW Here an overview is given of the most relevant gonadotropin-releasing hormone (GnRH) and somatostatin derivatives, as well as of their applications in cancer diagnosis and therapy. For this purpose, recently published data in these areas (mostly articles published from 2000 to 2009) were reviewed. WHAT THE READER WILL GAIN In contrast to other regulatory peptides that stimulate the tumor growth, GnRH and somatostatin derivatives have inhibitory effect; therefore, they were used primarily for the preparation of various conjugates to be used in targeted chemotherapy, targeted radiotherapy, photodynamic therapy, boron neutron capture therapy and cancer diagnosis. Some of these conjugates have already found clinical applications, whereas others are now in preclinical and clinical trials. TAKE HOME MESSAGE Tumor targeting with hormone peptides provides a basis for the development of new diagnostic and therapeutic approaches for cancer.
Collapse
Affiliation(s)
- Gábor Mezo
- Eötvös Loránd University, Research Group of Peptide Chemistry, Hungarian Academy of Sciences, 1117 Budapest, Hungary.
| | | |
Collapse
|
17
|
Sun LC, Mackey LV, Luo J, Fuselier JA, Coy DH. Targeted chemotherapy using a cytotoxic somatostatin conjugate to inhibit tumor growth and metastasis in nude mice. Clin Med Oncol 2008; 2:491-9. [PMID: 21892324 PMCID: PMC3161630 DOI: 10.4137/cmo.s970] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The major problems of traditional chemotherapy are non-selectivity and non-specificity, resulting in severe toxic side effects. Peptides are a new-generation of drug-delivery vector to increase efficacy of this therapy and avoid the resulting damage. The cytotoxic somatostatin (SST) conjugate JF-10-81 was developed by coupling camptothecin (CPT) to the N-terminus of a SST analog (JF-07-69) using an activated carbamate linker. This conjugate selectively targets somatostatin receptor subtype 2 (SSTR2) and also retains high binding affinity and rapid internalization as well as anti-proliferative activity towards various tumor cells. JF-10-81 was tested for its inhibitory activity against the growth of human tumors which included neuroblastoma (IMR32), pancreatic cancer (CFPAC-1), leukemia (MOLT-4), pancreatic carcinoid (BON) and prostate cancer (PC-3). Both SSTR2 mRNAs and proteins were detected in all these tumor cell lines. The conjugate displayed potent in vivo inhibitory activity, although some of the potency measured in in vitro experiments was lost. JF-10-81 was found to significantly inhibit growth of these SSTR-positive tumors, resulting in 87% tumor reduction in neuroblastoma IMR32 and 97% in leukemia MOLT-4 bearing animals, even inducing regression of CFPAC-1 tumors. SSTR-overexpressing BON tumors were unfortunately relatively CPT-insensitive in vitro, however, JF-10-81 again exhibited in vivo potency presumably by specifically increasing CPT concentrations inside the tumor cells so that the inhibition rate for JF-10-81 was 85%. Also, JF-10-81 was used to treat highly invasive PC-3 tumors where s.c. injections inhibited both tumor growth (almost 60% reduction) and tumor metastasis (over 70%). This conjugate demonstrated its broad and excellent anti-tumor activity by targeting SSTR2-specific tumor tissues, supporting that short peptides and their analogs may be applied as ideal drug-delivery carriers to improve the traditional chemotherapy.
Collapse
Affiliation(s)
- Li-Chun Sun
- Department of Medicine, Peptide Research Laboratories, Tulane Health Sciences Center, New Orleans, LA 70112-2699, U.S.A
| | | | | | | | | |
Collapse
|
18
|
Moody TW, Mantey SA, Fuselier JA, Coy DH, Jensen RT. Vasoactive intestinal peptide-camptothecin conjugates inhibit the proliferation of breast cancer cells. Peptides 2007; 28:1883-90. [PMID: 17580098 PMCID: PMC2742204 DOI: 10.1016/j.peptides.2007.04.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Revised: 04/23/2007] [Accepted: 04/25/2007] [Indexed: 11/20/2022]
Abstract
The effects of vasoactive intestinal peptide-camptothecin (VIP-CPT) conjugates were investigated on breast cancer cells and cells transfected with VIP receptors (R). (Ala(2,8,9,19,24.25.27), Nle(17), Lys(28))VIP, (A-NL-K)VIP, was synthesized and Lys(28) was coupled to a linker, N-methyl-amino-ethyl-glycine, L2, which formed a carbamate bond with CPT. The resulting (A-NL-K)VIP-L2-CPT was cytotoxic for MCF7 breast cancer cells, which have VPAC(1)-R, with IC(50) values of 380 and 90 nM using the MTT and clonogenic assays, respectively. (A-NL-K)VIP, (A-NL-K)VIP-L2 and (A-NL-K)VIP-L2-CPT inhibited specific binding of (125)I-VIP to 3T3 cells transfected with VPAC(1)-R with IC(50) values of 1.9, 56 and 126 nM, respectively. In contrast, (A-NL-K)VIP, (A-NL-K)VIP-L2 and (A-NL-K)VIP-L2-CPT inhibited specific binding of (125)I-Ro25-1553 to 3T3 cells transfected with VPAC(2)-R with IC(50) values of 3.9, 3162 and 2690 nM, respectively. (A-NL-K)VIP, (A-NL-K)VIP-L2 and (A-NL-K)VIP-L2-CPT caused increased cAMP after addition to MCF7 cells. (125)I-(A-NL-K)VIP-L2-CPT was internalized by MCF7 cells at 37 degrees C but not 4 degrees C. These results indicate that (A-NL-K)VIP-L2-CPT is a VPAC(1)-R agonist which is cytotoxic for breast cancer cells.
Collapse
Affiliation(s)
- Terry W Moody
- Department of Health and Human Services, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, United States.
| | | | | | | | | |
Collapse
|
19
|
Sun LC, Luo J, Mackey VL, Fuselier JA, Coy DH. Effects of camptothecin on tumor cell proliferation and angiogenesis when coupled to a bombesin analog used as a targeted delivery vector. Anticancer Drugs 2007; 18:341-8. [PMID: 17264768 DOI: 10.1097/cad.0b013e32801261b6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The camptothecin-bombesin conjugate termed DC-51-43, as a novel targeted drug delivery system, was examined in over 10 human tumor cell lines and shows a potent antiproliferative activity. This conjugate has also demonstrated its antitumor activity in our previous experiments. In our present study, we evaluate this conjugate for its antiangiogenic activity by in-vitro and in-vivo experiments. The camptothecin-bombesin conjugate and free camptothecin show potent in-vitro inhibitory activities of cell adhesion to various extracellular matrix components and integrins alphaVbeta3 and alphaVbeta5, not beta1/alphabeta1. This conjugate displays inhibitory activity to cell migration and invasion at concentrations of 10 micromol/l or above. This conjugate is also effective against in-vitro capillary-like tube formation of endothelial cells (at 40 micromol/l), and in-vivo angiogenesis as seen by blocking the spread of host mice endothelial cells into matrigel plugs. These experimental results support the fact that the camptothecin-bombesin conjugate has therapeutic activities against angiogenesis. By binding to bombesin receptor-expressing sites, this bombesin analog, consisting of 11 amino acids, is potentially a novel delivery vector for nonspecific cytotoxic agents.
Collapse
Affiliation(s)
- Li-Chun Sun
- Peptide Research Laboratories, Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA 70112, USA.
| | | | | | | | | |
Collapse
|
20
|
Sun LC, Luo J, Mackey LV, Fuselier JA, Coy DH. A conjugate of camptothecin and a somatostatin analog against prostate cancer cell invasion via a possible signaling pathway involving PI3K/Akt, αVβ3/αVβ5 and MMP-2/-9. Cancer Lett 2007; 246:157-66. [PMID: 16644105 DOI: 10.1016/j.canlet.2006.02.016] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Revised: 01/10/2006] [Accepted: 02/17/2006] [Indexed: 10/24/2022]
Abstract
Camptothecin (CPT) was conjugated to the N-terminal of a somatostatin analog (SSA) directly via a carbamate group and a basic N-terminal linking motif, D-Lys-D-Tyr-Lys-D-Tyr-D-Lys. This new CPT-SSA conjugate termed JF-10-81 was evaluated as a receptor-specific delivery system for its anti-invasive and anti-angiogenic activities. It was found that, in addition to blocking migration and invasion of highly invasive prostate cancer PC-3 cells, this conjugate also inhibited in vitro capillary-like tube formation of endothelial cells and in vivo angiogenesis in C57B1/6N female mice. JF-10-81 was found to block PC-3 cell attachment to various extracellular matrix components, mainly to vitronectin, the ligand of cell surface receptors integrin alphaVbeta3 and alphaVbeta5. Additionally, JF-10-81 reduced expression of integrins alphaVbeta3 and alphaVbeta5 on PC-3 cell surfaces, without effects on beta1 or any alphabeta1 heterodimers. This conjugate also inactivated phosphorylation of protein kinase B (PKB/Akt), down-regulated the expression of latent matrix metalloproteinase (MMP) -2 and MMP-9, but had little effect on MMP-3/-10. Meanwhile, membrane type-1 matrix metalloproteinase (MT1-MMP) and the tissue inhibitor of matrix metalloproteinase-2 (TIMP-2) were not detectable in PC-3 cells. alphaVbeta3/alphaVbeta5 and MMP-2/-9 are known to be highly expressed in many tumor cells and play an important role in tumor progression. Our results support that this conjugate could possibly inhibit prostate cancer PC-3 cell invasion through a signaling pathway involving PI3K/Akt, alphaVbeta3/alphaVbeta5 and MMP-2/-9, and this SSA could be used as an efficient vector to deliver CPT or other cytotoxic agents to target sites for cancer therapy.
Collapse
Affiliation(s)
- Li-Chun Sun
- Peptide Research Laboratories, Department of Medicine, Tulane Health Sciences Center, Tulane University School of Medicine, New Orleans, LA 70112-2699, USA.
| | | | | | | | | |
Collapse
|
21
|
Moody TW, Sun LC, Mantey SA, Pradhan T, Mackey LV, Gonzales N, Fuselier JA, Coy DH, Jensen RT. In Vitro and in Vivo Antitumor Effects of Cytotoxic Camptothecin-Bombesin Conjugates Are Mediated by Specific Interaction with Cellular Bombesin Receptors. J Pharmacol Exp Ther 2006; 318:1265-72. [PMID: 16766720 DOI: 10.1124/jpet.106.104141] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Most human tumors overexpress or ectopically express peptide hormone/neurotransmitter receptors, which are being increasingly studied as a means to selectively deliver cytotoxic agents. Although a number of peptide ligand-constructs demonstrate tumor cytotoxicity, the role of specific tumoral receptor interaction in its mediation is unclear. To address this question, we synthesized camptothecin (CPT) bombesin (Bn) analogs, in which CPT was coupled via a novel carbamate linker, L2 [N-(N-methyl-amino-ethyl)-glycine carbamate], that were chemically similar but differed markedly in their potency/affinity for human Bn receptors. We then examined their ability to interact with Bn receptors and cause in vitro and in vivo tumor cytotoxicity. CPT-L2-[D-Tyr(6),beta-Ala(11),D-Phe(13),Nle(14)] Bn (6-14) (BA3) bound with high affinity and had high potency for all three human Bn receptor subtypes, whereas CPT-L2-[D-Tyr(6),beta-Ala(11), D-Phe(13),Nle(14)] Bn (6-14) [D-Phe-CPT-L2-BA3] had >1400-fold lower affinity/potency. (125)I-CPT-L2-BA3 but not (125)I-D-Phe-CPT-L2-BA3 was internalized by Bn receptor subtype-containing cells. CPT-L2-BA3 displayed significantly more cytotoxicity than D-Phe-CPT-L2-BA3 toward NCI-H1299 lung cancer cells in both 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide and clonogenic assays and more potently inhibited H1299 xenograft growth in nude mice. CPT-L2-BA3 was also metabolically more stable than its parent peptide and inhibited growth of a number of other tumor cell lines in vitro and in vivo. These results demonstrate that specific tumoral receptor interaction is important in mediating the ability of peptide ligand-cytotoxic constructs to cause cytotoxicity. Because many tumors overexpress Bn receptors, these results also demonstrate that CPT-L2-BA3 will be a useful agent for delivering receptor-mediated cytotoxicity to many different human tumors.
Collapse
Affiliation(s)
- Terry W Moody
- Department of Health and Human Services, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Moody TW, Fuselier J, Coy DH, Mantey S, Pradhan T, Nakagawa T, Jensen RT. Camptothecin-somatostatin conjugates inhibit the growth of small cell lung cancer cells. Peptides 2005; 26:1560-6. [PMID: 16112393 DOI: 10.1016/j.peptides.2005.02.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Revised: 02/22/2005] [Accepted: 02/23/2005] [Indexed: 11/20/2022]
Abstract
The effects of camptothecin-somatostatin (CPT-SS) conjugates were investigated on small cell lung cancer (SCLC) cells. CPT was coupled to a SS agonist (SSA), c(Cys-Phe-DTrp-Lys-Thr-Cys)Thr-NH2 using the built in nucleophile assisted-releasing group (L1) N-methyl-aminoethyl-Gly-Dser-Nle-Dtyr-Dser or (L2) aminoethyl-Gly-Dser-Nle-Dtyr-Dser. The resulting CPT-L1-SSA and CPT-L2-SSA inhibited the specific binding of [125I-Tyr11]SS to NCI-H69 cell membranes with IC50 values of 0.2 and 2.1 nM, respectively. [125I]CPT-L1-SSA was internalized by SCLC cells at 37 degrees C but not at 4 degrees C. CPT-L1-SSA and CPT-L2-SSA inhibited in a dose-dependent manner the increase in adenylylcyclase activity caused by 25 microM forskolin. In vitro, 0.3 microM CPT-L1-SSA half-maximally inhibited the clonal growth of SCLC cells and 1 microM CPT-L1-SSA strongly inhibited 3H-thymidine incorporation into DNA and trypan-blue exclusion. These results suggest that CPT conjugated peptides such as CPT-L1-SSA may prove useful for exploring the efficacy of receptor-directed cytotoxicity to inhibit the proliferation of SCLC cells.
Collapse
Affiliation(s)
- Terry W Moody
- DHHS, NIH, NCI Office of the Director, CCR, 31 Center Drive, Bethesda, MD 20892, USA.
| | | | | | | | | | | | | |
Collapse
|