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Cerulli RA, Shehaj L, Tosic I, Jiang K, Wang J, Frank DA, Kritzer JA. Cytosolic delivery of peptidic STAT3 SH2 domain inhibitors. Bioorg Med Chem 2020; 28:115542. [PMID: 32503696 PMCID: PMC7294595 DOI: 10.1016/j.bmc.2020.115542] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/24/2020] [Accepted: 04/29/2020] [Indexed: 01/08/2023]
Abstract
The signal transducer and activator of transcription 3 (STAT3) protein is constitutively activated in several cancers. STAT3 activity can be blocked by inhibiting its Src Homology 2 (SH2) domain, but phosphotyrosine and its isosteres have poor bioavailability. In this work, we develop peptide-based inhibitors of STAT3-SH2 by combining chemical strategies that have proven effective for targeting other SH2 domains. These strategies include a STAT3-specific selectivity sequence, non-hydrolyzable phosphotyrosine isosteres, and a high-efficiency cell-penetrating peptide. Peptides that combined these three strategies had substantial biological stability and cytosolic delivery, as measured using highly quantitative cell-based assays. However, these peptides did not inhibit STAT3 activity in cells. By comparing in vitro binding affinity, cell penetration, and proteolytic stability, this work explores the delicate balance of factors that contribute to biological activity for peptidic inhibitors of STAT3.
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Affiliation(s)
- Robert A Cerulli
- Cell, Molecular and Developmental Biology Program, Graduate School of Biomedical Sciences, Tufts University, Boston, MA 02111, United States
| | - Livia Shehaj
- Department of Chemistry, Tufts University, Medford, MA 02155, United States
| | - Isidora Tosic
- Department of Biochemistry, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia; Dana Farber Cancer Institute, Department of Medical Oncology, Boston, MA 02215, United States
| | - Kevin Jiang
- Dana Farber Cancer Institute, Department of Medical Oncology, Boston, MA 02215, United States
| | - Jing Wang
- Department of Chemistry, Tufts University, Medford, MA 02155, United States
| | - David A Frank
- Dana Farber Cancer Institute, Department of Medical Oncology, Boston, MA 02215, United States; Brigham and Women's Hospital, Department of Medicine, Boston, MA 02115, United States; Harvard Medical School, Boston, MA 02111, United States
| | - Joshua A Kritzer
- Department of Chemistry, Tufts University, Medford, MA 02155, United States.
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102
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Cortés-Sarabia K, Rodríguez-Nava C, Medina-Flores Y, Mata-Ruíz O, López-Meza JE, Gómez-Cervantes MD, Parra-Rojas I, Illades-Aguiar B, Flores-Alfaro E, Vences-Velázquez A. Production and characterization of a monoclonal antibody against the sialidase of Gardnerella vaginalis using a synthetic peptide in a MAP8 format. Appl Microbiol Biotechnol 2020; 104:6173-6183. [PMID: 32462244 PMCID: PMC7253150 DOI: 10.1007/s00253-020-10691-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/07/2020] [Accepted: 05/17/2020] [Indexed: 11/27/2022]
Abstract
Abstract Bacterial vaginosis is one of the most frequent vaginal infections. Its main etiological agent is Gardnerella vaginalis, which produces several virulence factors involved in vaginal infection and colonization, in particular, sialidase (SLD), a potential clinical biomarker that participates in immune response modulation and mucus degradation. The main objective of this work was the production and evaluation of a monoclonal antibody against G. vaginalis sialidase and its validation in immunoassays. For immunization of mice, a synthetic multiantigenic peptide was used, and hybridomas were generated. After fusion, hybridomas were evaluated for antibody production and cloned by limited dilution. One clone producing IgG1 was selected and characterized by indirect ELISA, dot blot, and Western blot, and we also tested clinical isolates and HeLa cells infected with G. vaginalis. The results showed that the anti-SLD antibody recognized a single protein of ~90 kDa that correlated with the estimated molecular weight of SLD. In addition, anti-SLD antibody recognized SLD from complete bacteria and from culture supernatants of infected Hela cells. In conclusion, our results showed that the anti-SLD antibody recognized SLD from different sources and could be considered a new tool for the diagnosis of bacterial vaginosis. Key Points • Anti-sialidase mAb was generated using a synthetic peptide • The mAb recognizes synthetic peptide and intact protein from multiple sources • The antibody was characterized by several immunological methods
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Affiliation(s)
- Karen Cortés-Sarabia
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, Mexico
| | - Cynthia Rodríguez-Nava
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, Mexico
| | - Yolanda Medina-Flores
- Laboratorio de Anticuerpos Monoclonales, Instituto de Diagnóstico y Referencia Epidemiológicos "Dr. Manuel Martínez Báez", Francisco de P. Miranda 177, Lomas de Plateros, 01480, Ciudad de México, Mexico
| | - Olga Mata-Ruíz
- Laboratorio de Anticuerpos Monoclonales, Instituto de Diagnóstico y Referencia Epidemiológicos "Dr. Manuel Martínez Báez", Francisco de P. Miranda 177, Lomas de Plateros, 01480, Ciudad de México, Mexico
| | - Joel E López-Meza
- Centro Multidisciplinario de Estudios en Biotecnología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | | | - Isela Parra-Rojas
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, Mexico
| | - Berenice Illades-Aguiar
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, Mexico
| | - Eugenia Flores-Alfaro
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, Mexico
| | - Amalia Vences-Velázquez
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, Mexico.
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103
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Wan J, Li Y, Jin K, Guo J, Xu J, Wang C. Robust Strategy for Antibody-Polymer-Drug Conjugation: Significance of Conjugating Orientation and Linker Charge on Targeting Ability. ACS Appl Mater Interfaces 2020; 12:23717-23725. [PMID: 32368886 DOI: 10.1021/acsami.0c04471] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Antibody-drug conjugates have shown great promise in active targeting for cancer therapy. The existing chemical techniques for antibody conjugation generally lack efficiency or universality. In this article, a site-specific antibody conjugation was developed by using a mild reaction between a benzoboroxole (BB) functionality and cis-diol moiety of sugar units in the antibody fragment crystallizable region under neutral pH conditions. A BB/PEG/ICG-grafted poly(aspartic acid) comb-like functional polymer was first synthesized and conjugated with transferrin (Tf) to form a transferrin-polymer-drug conjugate [Tf-P(BB)], which showed 120% increase in HepG2 hepatoma (Tf receptor overexpression) cell uptake compared to a nontargeting protein-polymer-drug conjugate [HRP-P(BB)]. The universality of this method was further demonstrated by the enhanced uptake of trastuzumab (anti-Her2 antibody)-polymer-drug conjugates in MCF-7 (295%) and MDA-MB-435S (66.4%) (Her2 positive) cells. The positive charge of the linker had great influence on the targeting ability of the antibody-polymer-drug conjugates. The in vivo studies demonstrated the distinct targeting ability of Tf-P(BB) in the HepG2 xenograft tumor, and the tumor accumulation of the Tf-P(BB) testing group increased by 92% with respect to the control group [HRP-P(BB)]. More significantly, the HepG2 cell uptake amount of the antibody-oriented conjugate [Tf-P'(BB)] was 2.4-fold higher than that of the controlled group [Tf-P'(Hex)]. On the basis of this facile site-specific conjugation method, the conjugates are able to change the antibody species easily against various cancers, while maintaining the antibody integrity and targeting ability.
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Affiliation(s)
- Jiaxun Wan
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, P.R. China
| | - Yongjing Li
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, P.R. China
| | - Ke Jin
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, P.R. China
| | - Jia Guo
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, P.R. China
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney 2052, Australia
| | - Changchun Wang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, P.R. China
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104
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Wang Y, Yang X, Liu T, Li Z, Leskauskas D, Liu G, Matson JB. Molecular-Level Control over Plasmonic Properties in Silver Nanoparticle/Self-Assembling Peptide Hybrids. J Am Chem Soc 2020; 142:9158-9162. [PMID: 32392041 PMCID: PMC7657666 DOI: 10.1021/jacs.0c03672] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The plasmonic properties of silver nanoparticle (AgNP) arrays are directly controlled by AgNP size, shape, and spatial arrangement. Reported here is a strategy to prepare chiral AgNP arrays templated by two constitutionally isomeric aromatic peptide amphiphiles (APAs), KSC'EKS and C'EKSKS (KS = S-aroylthiooxime-modified lysine, C' = citrulline, and E = glutamic acid). In phosphate buffer, both APAs initially self-assembled into nanoribbons with a similar geometry. However, in the presence of silver ions and poly(sodium 4-styrenesulfonate) (PSSS), one of the nanoribbons (KSC'EKS) turned into nanohelices with a regular twisting pitch, while the other (C'EKSKS) remained as nanoribbons. Both were used as templates for synthesis of arrays of ∼8 nm AgNPs to understand how small changes in molecular structure affect the plasmonic properties of these chiral AgNP/APA hybrids. Both hybrids showed improved colloidal stability compared to pure AgNPs, and both showed enhanced sensitivity as surface-enhanced Raman spectroscopy (SERS) substrates for model analytes, with nanohelices showing better SERS performance compared to their nanoribbon counterparts and pure AgNPs.
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Affiliation(s)
- Yin Wang
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, United States
| | - Xiaozhou Yang
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
| | - Tianyu Liu
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
| | - Zhao Li
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, United States
| | - David Leskauskas
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
| | - Guoliang Liu
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, United States
| | - John B. Matson
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, United States
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105
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Evans BJ, King AT, Katsifis A, Matesic L, Jamie JF. Methods to Enhance the Metabolic Stability of Peptide-Based PET Radiopharmaceuticals. Molecules 2020; 25:molecules25102314. [PMID: 32423178 PMCID: PMC7287708 DOI: 10.3390/molecules25102314] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/11/2020] [Accepted: 05/13/2020] [Indexed: 12/28/2022] Open
Abstract
The high affinity and specificity of peptides towards biological targets, in addition to their favorable pharmacological properties, has encouraged the development of many peptide-based pharmaceuticals, including peptide-based positron emission tomography (PET) radiopharmaceuticals. However, the poor in vivo stability of unmodified peptides against proteolysis is a major challenge that must be overcome, as it can result in an impractically short in vivo biological half-life and a subsequently poor bioavailability when used in imaging and therapeutic applications. Consequently, many biologically and pharmacologically interesting peptide-based drugs may never see application. A potential way to overcome this is using peptide analogues designed to mimic the pharmacophore of a native peptide while also containing unnatural modifications that act to maintain or improve the pharmacological properties. This review explores strategies that have been developed to increase the metabolic stability of peptide-based pharmaceuticals. It includes modifications of the C- and/or N-termini, introduction of d- or other unnatural amino acids, backbone modification, PEGylation and alkyl chain incorporation, cyclization and peptide bond substitution, and where those strategies have been, or could be, applied to PET peptide-based radiopharmaceuticals.
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Affiliation(s)
- Brendan J. Evans
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia; (B.J.E.); (A.T.K.)
| | - Andrew T. King
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia; (B.J.E.); (A.T.K.)
| | - Andrew Katsifis
- Department of Molecular Imaging, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia;
| | - Lidia Matesic
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia;
| | - Joanne F. Jamie
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia; (B.J.E.); (A.T.K.)
- Correspondence: ; Tel.: +61-2-9850-8283
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106
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Affiliation(s)
- Beatriz G. de la Torre
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
- Correspondence: (B.G.d.l.T.); or (F.A.)
| | - Fernando Albericio
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban 4000, South Africa
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), 08034 Barcelona, Spain
- Department of Organic Chemistry, University of Barcelona, Martí i Franqués 1-11, 08028 Barcelona, Spain
- Correspondence: (B.G.d.l.T.); or (F.A.)
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107
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Lutter L, Serpell CJ, Tuite MF, Serpell LC, Xue WF. Three-dimensional reconstruction of individual helical nano-filament structures from atomic force microscopy topographs. Biomol Concepts 2020; 11:102-115. [PMID: 32374275 DOI: 10.1515/bmc-2020-0009] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 03/30/2020] [Indexed: 08/19/2023] Open
Abstract
Atomic force microscopy, AFM, is a powerful tool that can produce detailed topographical images of individual nano-structures with a high signal-to-noise ratio without the need for ensemble averaging. However, the application of AFM in structural biology has been hampered by the tip-sample convolution effect, which distorts images of nano-structures, particularly those that are of similar dimensions to the cantilever probe tips used in AFM. Here we show that the tip-sample convolution results in a feature-dependent and non-uniform distribution of image resolution on AFM topographs. We show how this effect can be utilised in structural studies of nano-sized upward convex objects such as spherical or filamentous molecular assemblies deposited on a flat surface, because it causes 'magnification' of such objects in AFM topographs. Subsequently, this enhancement effect is harnessed through contact-point based deconvolution of AFM topographs. Here, the application of this approach is demonstrated through the 3D reconstruction of the surface envelope of individual helical amyloid filaments without the need of cross-particle averaging using the contact-deconvoluted AFM topographs. Resolving the structural variations of individual macromolecular assemblies within inherently heterogeneous populations is paramount for mechanistic understanding of many biological phenomena such as amyloid toxicity and prion strains. The approach presented here will also facilitate the use of AFM for high-resolution structural studies and integrative structural biology analysis of single molecular assemblies.
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Affiliation(s)
- Liisa Lutter
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ, Canterbury, UK
| | | | - Mick F Tuite
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ, Canterbury, UK
| | - Louise C Serpell
- Sussex Neuroscience, School of Life Sciences, University of Sussex, BN1 9QG, Falmer, Brighton, UK
| | - Wei-Feng Xue
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ, Canterbury, UK
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108
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Roy SR, Li G, Hu X, Zhang S, Yukawa S, Du E, Zhang Y. Integrin and Heparan Sulfate Dual-Targeting Peptide Assembly Suppresses Cancer Metastasis. ACS Appl Mater Interfaces 2020; 12:19277-19284. [PMID: 32266811 DOI: 10.1021/acsami.0c02235] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metastasis is one of the ongoing challenges in cancer therapy which most treatments failed to address. Inspired by the upregulated expression of both integrin β1 and heparan sulfate in metastatic tumors, we developed an integrin/HS dual-targeting peptide assembly that selectively inhibits cancer cell migration and invasion. Particularly, the dual-targeting peptide self-assembles into nanofibrous microdomains specifically on the cancer cell membrane, triggering spatial organization of integrins, which form clusters on the apical membrane. Via the actin cytoskeleton that physically connects to integrin clusters, the oncogene yes-associated protein, which regulates cancer metastasis, is deactivated. We showed that in multiple cancer cell lines, including the highly metastatic pancreatic cancer cells, the dual-targeting peptide exerts potent and dose-dependent antimetastatic effects. Our work illustrates how basic biochemical insights can be exploited as the basis for nano-biointerface fabrication, which is potentially a general design strategy for nanomedicine development.
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Affiliation(s)
- Sona Rani Roy
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Guanying Li
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Xunwu Hu
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Shijin Zhang
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Sachie Yukawa
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Enming Du
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Ye Zhang
- Bioinspired Soft Matter Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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109
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Concepción O, Belmar J, F. de la Torre A, M. Muñiz F, Pertino MW, Alarcón B, Ormazabal V, Nova-Lamperti E, Zúñiga FA, Jiménez CA. Synthesis and Cytotoxic Analysis of Novel Myrtenyl Grafted Pseudo-Peptides Revealed Potential Candidates for Anticancer Therapy. Molecules 2020; 25:molecules25081911. [PMID: 32326138 PMCID: PMC7221699 DOI: 10.3390/molecules25081911] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/11/2020] [Accepted: 04/13/2020] [Indexed: 11/16/2022] Open
Abstract
Myrtenal is a natural monoterpene isolated from essential oils of several plants and their derivates have shown to have several biological properties including cytotoxicity. The cytotoxic activity of these derivates are being investigated for their antitumor effect leading to the development of potential anticancer agents. In this study, novels Myrtenyl grafted pseudo-peptides were designed, synthesized and functionally characterized as possible therapeutic agents for cancer treatment. Thirteen novel Myrtenyl grafted pseudo-peptides were prepared in high atom economy and efficiency by a classic Ugi-4CR and sequential post-modification. Their structures were confirmed by NMR, and ESI-MS, and its cytotoxic activity was evaluated in three cancer cell lines and primary CD4+ T cells at different proliferative cycles. Our results revealed that some of these compounds showed significant cytotoxicity against human gastric, breast and colon adenocarcinoma cells lines, but not against human dermal fibroblast cell line. Moreover, from the thirteen novel myrtenyl synthesized the compound (1R,5S)-N-{[1-(3-chlorophenyl)-1H-1,2,3-triazol-4-yl]methyl}-N-[2-(cyclohexylamino)-2–oxoethyl]-6,6-dimethylbicyclo[3.1.1]hept-2-ene-2-carboxamide (3b) proved to be the best candidate in terms of acceptable EC50, and Emax values in cancer cell lines and at inducing cytotoxicity in CD4+ T cells undergoing active proliferation, without affecting non-proliferating T cells. Overall, the synthesis and characterization of our Myrtenyl derivates revealed novel potential anticancer candidates with selective cytotoxic activity.
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Affiliation(s)
- Odette Concepción
- Department of Organic Chemistry, Faculty of Chemical Sciences, Universidad de Concepción, Edmundo Larenas 129, Concepción P.C. 4070371, Chile; (J.B.); (A.F.d.l.T.); (F.M.M.)
- Correspondence: (O.C.); (C.A.J.); Tel.: +56-41-22042658 (O.C. & C.A.J.)
| | - Julio Belmar
- Department of Organic Chemistry, Faculty of Chemical Sciences, Universidad de Concepción, Edmundo Larenas 129, Concepción P.C. 4070371, Chile; (J.B.); (A.F.d.l.T.); (F.M.M.)
| | - Alexander F. de la Torre
- Department of Organic Chemistry, Faculty of Chemical Sciences, Universidad de Concepción, Edmundo Larenas 129, Concepción P.C. 4070371, Chile; (J.B.); (A.F.d.l.T.); (F.M.M.)
| | - Francisco M. Muñiz
- Department of Organic Chemistry, Faculty of Chemical Sciences, Universidad de Concepción, Edmundo Larenas 129, Concepción P.C. 4070371, Chile; (J.B.); (A.F.d.l.T.); (F.M.M.)
| | - Mariano W. Pertino
- Institute of Natural Resources Chemistry, Universidad de Talca, Casilla 747, Avenida Lircay, Talca P.C. 3462227, Chile;
| | - Barbara Alarcón
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepción, Concepción P.C. 4070371, Chile; (B.A.); (E.N.-L.); (F.A.Z.)
| | - Valeska Ormazabal
- Department of Pharmacology, Faculty of Biological Sciences, Universidad de Concepción, Concepción P.C. 4070371, Chile;
| | - Estefania Nova-Lamperti
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepción, Concepción P.C. 4070371, Chile; (B.A.); (E.N.-L.); (F.A.Z.)
| | - Felipe A. Zúñiga
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepción, Concepción P.C. 4070371, Chile; (B.A.); (E.N.-L.); (F.A.Z.)
| | - Claudio A. Jiménez
- Department of Organic Chemistry, Faculty of Chemical Sciences, Universidad de Concepción, Edmundo Larenas 129, Concepción P.C. 4070371, Chile; (J.B.); (A.F.d.l.T.); (F.M.M.)
- Correspondence: (O.C.); (C.A.J.); Tel.: +56-41-22042658 (O.C. & C.A.J.)
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Zong L, Wang Y, Qiao P, Yu K, Hou X, Wang P, Zhang Z, Pang X, Pu X, Yuan Q. Reduction-sensitive poly(ethylene glycol)-polypeptide conjugate micelles for highly efficient intracellular delivery and enhanced antitumor efficacy of hydroxycamptothecin. Nanotechnology 2020; 31:165102. [PMID: 31899896 DOI: 10.1088/1361-6528/ab6749] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The non-specific biodistribution of traditional chemotherapeutic drugs against tumors is the key factor that causes systemic toxicity and hinders their clinical application. In this study, a reduction-sensitive polymer conjugate micelle was manufactured to achieve tumor-specific targeting, reduce toxic side-effects and improve anti-tumor activity of a natural anti-cancer drug, hydroxycamptothecin (HCPT). Therefore, HCPT was conjugated with methoxy-poly(ethylene glycol)-poly(β-benzyl-L-aspartate) (mPEG-PBLA) by a disulfide bond or succinate bond for the first time to obtain the mPEG-PBLA-SS-HCPT (PPSH) and mPEG-PBLA-CC-HCPT (PPCH) that would form micelles after high-speed agitation and dialysis. The PPSH micelles showed an average particle size of 126.3 nm, a low polydispersity index of 0.209, and a negative surface charge of -21.1 mV zeta potential. Transmission electron microscopy showed the PPSH micelles to have spherical morphology. PPSH had a low critical micelle concentration of 1.29 μg ml-1 with high dilution stability, storage stability and reproducibility. Moreover, the particle size of the PPSH micelles had no significant change after incubation with rat plasma for 72 h, probably resulting in high long circulation in the blood. The PPSH micelles showed significant reduction sensitivity to glutathione. Their sizes increased by 403.2 nm after 24 h post-incubation, and 87.6% drug release was achieved 48 h post-incubation with 40 mM glutathione solutions. The PPSH micelles showed stronger inhibition of HepG2 cells in vitro and growth of H-22 tumor in vivo than the PPCH and HCPT solutions after intravenous injection. The accumulation of PPSH micelles in the tumor tissue contributed to the high anti-tumor effect with little side-effect on the normal tissues. The reduction-sensitive PPSH micelles were a promising carrier of HCPT and other poorly soluble anti-cancer drugs.
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111
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Maaßen A, Gebauer JM, Theres Abraham E, Grimm I, Neudörfl J, Kühne R, Neundorf I, Baumann U, Schmalz H. Triple-Helix-Stabilizing Effects in Collagen Model Peptides Containing PPII-Helix-Preorganized Diproline Modules. Angew Chem Int Ed Engl 2020; 59:5747-5755. [PMID: 31944532 PMCID: PMC7154665 DOI: 10.1002/anie.201914101] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Indexed: 02/02/2023]
Abstract
Collagen model peptides (CMPs) serve as tools for understanding stability and function of the collagen triple helix and have a potential for biomedical applications. In the past, interstrand cross-linking or conformational preconditioning of proline units through stereoelectronic effects have been utilized in the design of stabilized CMPs. To further study the effects determining collagen triple helix stability we investigated a series of CMPs containing synthetic diproline-mimicking modules (ProMs), which were preorganized in a PPII-helix-type conformation by a functionalizable intrastrand C2 bridge. Results of CD-based denaturation studies were correlated with calculated (DFT) conformational preferences of the ProM units, revealing that the relative helix stability is mainly governed by an interplay of main-chain preorganization, ring-flip preference, adaptability, and steric effects. Triple helix integrity was proven by crystal structure analysis and binding to HSP47.
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Affiliation(s)
- Andreas Maaßen
- University of CologneDepartment of ChemistryGreinstraße 450939CologneGermany
| | - Jan M. Gebauer
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
| | - Elena Theres Abraham
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
| | - Isabelle Grimm
- University of CologneDepartment of ChemistryGreinstraße 450939CologneGermany
| | | | - Ronald Kühne
- Leibniz-Institut für Molekulare Pharmakologie (FMP)Campus Berlin-BuchRobert-Rössle-Straße 1013125BerlinGermany
| | - Ines Neundorf
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
| | - Ulrich Baumann
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
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112
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Abstract
The use of proteins and peptides as nanoscale components to generate new-to-nature physical entities holds great promise in biocatalysis, therapeutic or diagnostic delivery, and materials templating. The majority of functionalized particles have been based on existing structures found in nature. Developing biomimetic particles in this way takes advantage of highly evolved platforms for organization or encapsulation of functional moieties, offering significant advantages in stoichiometry, multivalency, and sequestration. However, novel assembly paradigms for the modular construction of macromolecular structures are now greatly expanding the functional diversity of protein-based nanoparticles in health and manufacturing. In the February issue of ACS Nano, Kepiro et al. demonstrate the refinement of this concept, engineering the capacity for self-assembly such that it is integral to pore-forming peptide motifs, resulting in superior antibiotic activity of the self-assembled particle. Nature encodes multiple functions in proteins with exquisite efficiency, and emulating this multiplicity may be the ultimate goal of biomimetic nanotechnologies.
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Affiliation(s)
- Frank Sainsbury
- Centre for Cell Factories and Biopolymers, Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
- Synthetic Biology Future Science Platform, Commonwealth Scientific and Industrial Research Organisation, Brisbane, Queensland 4001, Australia
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113
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Osmulski PA, Karpowicz P, Jankowska E, Bohmann J, Pickering AM, Gaczyńska M. New Peptide-Based Pharmacophore Activates 20S Proteasome. Molecules 2020; 25:E1439. [PMID: 32235805 PMCID: PMC7145288 DOI: 10.3390/molecules25061439] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/13/2020] [Accepted: 03/18/2020] [Indexed: 02/01/2023] Open
Abstract
The proteasome is a pivotal element of controlled proteolysis, responsible for the catabolic arm of proteostasis. By inducing apoptosis, small molecule inhibitors of proteasome peptidolytic activities are successfully utilized in treatment of blood cancers. However, the clinical potential of proteasome activation remains relatively unexplored. In this work, we introduce short TAT peptides derived from HIV-1 Tat protein and modified with synthetic turn-stabilizing residues as proteasome agonists. Molecular docking and biochemical studies point to the α1/α2 pocket of the core proteasome α ring as the binding site of TAT peptides. We postulate that the TATs' pharmacophore consists of an N-terminal basic pocket-docking "activation anchor" connected via a β turn inducer to a C-terminal "specificity clamp" that binds on the proteasome α surface. By allosteric effects-including destabilization of the proteasomal gate-the compounds substantially augment activity of the core proteasome in vitro. Significantly, this activation is preserved in the lysates of cultured cells treated with the compounds. We propose that the proteasome-stimulating TAT pharmacophore provides an attractive lead for future clinical use.
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Affiliation(s)
- Paweł A. Osmulski
- Department of Molecular Medicine, UT Health San Antonio, Texas, TX 78245, USA;
- Barshop Institute for Longevity and Aging Studies, UT Health San Antonio, Texas, TX 78245, USA
| | - Przemysław Karpowicz
- Department of Organic Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
- Department of Biomedical Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
| | - Elżbieta Jankowska
- Department of Biomedical Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
| | - Jonathan Bohmann
- Southwest Research Institute, San Antonio, Texas, TX 78238, USA;
| | - Andrew M. Pickering
- Department of Molecular Medicine, UT Health San Antonio, Texas, TX 78245, USA;
- Barshop Institute for Longevity and Aging Studies, UT Health San Antonio, Texas, TX 78245, USA
- The Glenn Biggs Institute for Alzheimer’s & Neurodegenerative Diseases, UT Health San Antonio, TX 78229, USA
| | - Maria Gaczyńska
- Department of Molecular Medicine, UT Health San Antonio, Texas, TX 78245, USA;
- Barshop Institute for Longevity and Aging Studies, UT Health San Antonio, Texas, TX 78245, USA
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114
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Hilderbrand AM, Ford EM, Guo C, Sloppy JD, Kloxin AM. Hierarchically structured hydrogels utilizing multifunctional assembling peptides for 3D cell culture. Biomater Sci 2020; 8:1256-1269. [PMID: 31854388 PMCID: PMC7439559 DOI: 10.1039/c9bm01894h] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Approaches for the creation of soft materials, particularly hydrogels, with hierarchical structure are of interest in a variety of applications owing to their unique properties. In the context of tissue mimics, hydrogels with multiscale structures more accurately capture the complexities of tissues within the body (e.g., fibrous collagen-rich microenvironments). However, cytocompatible fabrication of such materials with hierarchical structures and independent control of mechanical and biochemical properties remains challenging and is needed for probing and directing cell-microenvironment interactions for three-dimensional (3D) cell encapsulation and culture applications. To address this, we have designed innovative multifunctional assembling peptides: these unique peptides contain a core block that mimics the structure of collagen for achieving relevant melting temperatures; 'sticky' ends to promote assembly of long fibrils; and a biocompatible reactive handle that is orthogonal to assembly to allow the formation of desired multiscale structures and their subsequent rapid, light-triggered integration within covalently crosslinked synthetic hydrogels. Nano- to micro-fibrils were observed to form in physiologically-relevant aqueous solutions, where both underlying peptide chemical structure and assembly conditions were observed to impact the resulting fibril sizes. These assembled structures were 'locked' into place and integrated as linkers within cell-degradable, bioactive hydrogels formed with photoinitiated thiol-ene 'click' chemistry. Hydrogel compositions were identified for achieving robust mechanical properties like those of soft tissues while also retaining higher ordered structures after photopolymerization. The utility of these innovative materials for 3D cell culture was demonstrated with human mesenchymal stem cells, where cell morphologies reminiscent of responses to assembled native collagen were observed now with a fully synthetic material. Using a bottom-up approach, a new materials platform has been established that combines the advantageous properties of covalent and assembling chemistries for the creation of synthetic hydrogels with controllable nanostructure, mechanical properties, and biochemical content.
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Affiliation(s)
- Amber M Hilderbrand
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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115
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Zheng Y, Zhang Y, San S. Efficacy of a Novel ACE-Inhibitory Peptide from Sargassum Maclurei in Hypertension and Reduction of Intracellular Endothelin-1. Nutrients 2020; 12:E653. [PMID: 32121212 PMCID: PMC7146574 DOI: 10.3390/nu12030653] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/22/2020] [Accepted: 02/25/2020] [Indexed: 12/21/2022] Open
Abstract
Sargassum maclurei is a potential protein resource because of its high protein content and relatively balanced amino acid composition. To promote its usage in food, medical, or other industries, S. maclurei protein was hydrolyzed by pepsin and papain to obtain bioactive peptides. The S. maclurei protein hydrolysates (SMPHs) were purified using gel chromatography and reversed-phase high performance liquid chromatography (RP-HPLC), and 12 major fractions were obtained. The fraction D11 with the highest angiotensin I-converting enzyme (ACE) inhibition (61.59%, at 1 mg/ mL) was subjected to liquid chromatography-mass spectrometry (LC-MS/MS) analysis, and about 17 peptides were identified, of which the RWDISQPY (1063.5 Da) was chosen to be synthesized based on in silico analysis. The RWDISQPY demonstrated high ACE inhibition ability (IC50: 72.24 μM) with competitive inhibition mode, and could effectively (p < 0.05) lower the systolic blood pressure and diastolic pressure of spontaneously hypertensive rats at the concentration of 150 mg/kg body weight. The results of the molecular docking simulation demonstrated that RWDISQPY could bind with the active sites S1 and S2 of ACE via short hydrogen bonds. Moreover, RWDISQPY showed acceptable endothelin-1 suppressing capacity (26.21% at 1.5 mg/mL). These results indicate that S. maclurei could be developed into functional foods such as antihypertensive products.
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Affiliation(s)
- Yajun Zheng
- Food Science Institute of Shanxi Normal University, Linfen 041004, China
| | - Yufeng Zhang
- Coconut Research Institute of Chinese Tropical Agriculture Academic, Haikou 570100, China;
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Kunming 650093, China;
| | - Sang San
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Kunming 650093, China;
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116
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Cong Z, Zhang L, Ma SQ, Lam KS, Yang FF, Liao YH. Size-Transformable Hyaluronan Stacked Self-Assembling Peptide Nanoparticles for Improved Transcellular Tumor Penetration and Photo-Chemo Combination Therapy. ACS Nano 2020; 14:1958-1970. [PMID: 32023048 DOI: 10.1021/acsnano.9b08434] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Size-transformable nanomedicine has the potential to overcome systemic and local barriers, leading to efficient accumulation and penetration throughout the tumor tissue. However, the design of this type of nanomedicine was seldom based on active targeting and intracellular size transformation. Here, we report an intracellular size-transformable nanosystem, in which small and positively charged nanoparticles (<30 nm) prepared from the self-assembly of an amphiphilic hexadecapeptide derivative was coated by folic acid- and dopamine-decorated hyaluronan (HA) to form large and negatively charged nanoparticles (∼130 nm). This nanosystem has been proven to improve the blood circulation half-life of the drug and prevent premature intravascular drug leakage from the nanocarrier. Once accumulated in the tumor, the nanoparticles were prone to HA- and folic acid-mediated cellular uptake, followed by intracellular size transformation and discharge of transformed small nanoparticles. The size-transformable nanosystem facilitated the transcytosis-mediated tumor penetration and improved the internalization of nanoparticles by cells and the intracellular release of 7-ethyl-10 hydroxycamptothecin. With an indocyanine green derivative as the intrinsic component of the amphiphilic polymer, the nanosystem has exhibited additional theranostic functions: photoacoustic imaging, NIR-laser-induced drug release, and synergistic chemotherapy and phototherapy, leading to a 50% complete cure rate in a subcutaneous B16 melanoma model. This nanosystem with multimodalities and efficient tumor penetration has shown potentials in improving anticancer efficacy.
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MESH Headings
- Animals
- Antineoplastic Agents, Phytogenic/administration & dosage
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/pharmacology
- Cell Line, Tumor
- Cell Survival
- Combined Modality Therapy
- Disease Models, Animal
- Dopamine/chemistry
- Female
- Folic Acid/chemistry
- Hyaluronic Acid/chemistry
- Indocyanine Green/administration & dosage
- Indocyanine Green/chemistry
- Injections, Intravenous
- Irinotecan/administration & dosage
- Irinotecan/chemistry
- Irinotecan/pharmacology
- Male
- Melanoma, Experimental/diagnostic imaging
- Melanoma, Experimental/therapy
- Mice
- Mice, Inbred C57BL
- Nanoparticles/chemistry
- Optical Imaging
- Particle Size
- Peptides/chemical synthesis
- Peptides/chemistry
- Rats
- Rats, Wistar
- Surface Properties
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Affiliation(s)
- Zhaoqing Cong
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences & Peking Union Medical College , 151 Malianwa North Road, Haidian District , Beijing 100193 , China
- Department of Biochemistry and Molecular Medicine, UC Davis NCI-designated Comprehensive Cancer Center , University of California Davis , Sacramento , California 95817 , United States
| | - Lu Zhang
- Department of Biochemistry and Molecular Medicine, UC Davis NCI-designated Comprehensive Cancer Center , University of California Davis , Sacramento , California 95817 , United States
| | - Si-Qi Ma
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences & Peking Union Medical College , 151 Malianwa North Road, Haidian District , Beijing 100193 , China
| | - Kit S Lam
- Department of Biochemistry and Molecular Medicine, UC Davis NCI-designated Comprehensive Cancer Center , University of California Davis , Sacramento , California 95817 , United States
| | - Fei-Fei Yang
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences & Peking Union Medical College , 151 Malianwa North Road, Haidian District , Beijing 100193 , China
| | - Yong-Hong Liao
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences & Peking Union Medical College , 151 Malianwa North Road, Haidian District , Beijing 100193 , China
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117
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Neumann K, Farnung J, Baldauf S, Bode JW. Prevention of aspartimide formation during peptide synthesis using cyanosulfurylides as carboxylic acid-protecting groups. Nat Commun 2020; 11:982. [PMID: 32080186 PMCID: PMC7033154 DOI: 10.1038/s41467-020-14755-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 01/23/2020] [Indexed: 12/13/2022] Open
Abstract
Although peptide chemistry has made great progress, the frequent occurrence of aspartimide formation during peptide synthesis remains a formidable challenge. Aspartimide formation leads to low yields in addition to costly purification or even inaccessible peptide sequences. Here, we report an alternative approach to address this longstanding challenge of peptide synthesis by utilizing cyanosulfurylides to mask carboxylic acids by a stable C-C bond. These functional groups-formally zwitterionic species-are exceptionally stable to all common manipulations and impart improved solubility during synthesis. Deprotection is readily and rapidly achieved under aqueous conditions with electrophilic halogenating agents via a highly selective C-C bond cleavage reaction. This protecting group is employed for the synthesis of a range of peptides and proteins including teduglutide, ubiquitin, and the low-density lipoprotein class A. This protecting group strategy has the potential to overcome one of the most difficult aspects of modern peptide chemistry.
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Affiliation(s)
- Kevin Neumann
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Jakob Farnung
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Simon Baldauf
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland.
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8602, Japan.
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118
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Falciani C, Zevolini F, Brunetti J, Riolo G, Gracia R, Marradi M, Loinaz I, Ziemann C, Cossío U, Llop J, Bracci L, Pini A. Antimicrobial Peptide-Loaded Nanoparticles as Inhalation Therapy for Pseudomonas aeruginosa Infections. Int J Nanomedicine 2020; 15:1117-1128. [PMID: 32110011 PMCID: PMC7034994 DOI: 10.2147/ijn.s218966] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 01/27/2020] [Indexed: 01/03/2023] Open
Abstract
INTRODUCTION Antibiotic-resistant bacteria kill 25,000 people every year in the EU. Patients subject to recurrent lung infections are the most vulnerable to severe or even lethal infections. For these patients, pulmonary delivery of antibiotics would be advantageous, since inhalation can achieve higher concentration in the lungs than iv administration and can provide a faster onset of action. This would allow for the delivery of higher doses and hence reduce the number of treatments required. We report here about a new nanosystem (M33-NS) obtained by capturing SET-M33 peptide on single-chain dextran nanoparticles. SET-M33 is a non-natural antimicrobial peptide synthesized in branched form. This form gives the peptide resistance to degradation in biological fluids. SET-M33 has previously shown efficacy in vitro against about one hundred of Gram-negative multidrug and extensively drug-resistant clinical isolates and was also active in preclinical infection models of pneumonia, sepsis and skin infections. METHODS The new nanosystem was evaluated for its efficacy in bacteria cells and in a mouse model of pneumonia. Toxicity and genotoxicity were also tested in vitro. Biodistribution and pharmacokinetic studies in healthy rats were carried out using a radiolabeled derivative of the nanosystem. RESULTS The M33-nanosystem, studied here, showed to be effective against Pseudomonas aeruginosa in time-kill kinetic experiments. Cytotoxicity towards different animal cell lines was acceptable. Lung residence time of the antimicrobial peptide, administered via aerosol in healthy rats, was markedly improved by capturing SET-M33 on dextran nanoparticles. M33-NS was also efficient in eradicating pulmonary infection in a BALB/c mouse model of pneumonia caused by P. aeruginosa. DISCUSSION This study revealed that the encapsulation of the antimicrobial peptide in dextran nanoparticles markedly improved lung residence time of the peptide administered via aerosol. The result has to be considered among the aims of the development of a new therapeutic option for patients suffering recurrent infections, that will benefit from high local doses of persistent antimicrobials.
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Affiliation(s)
- Chiara Falciani
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Fabrizia Zevolini
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Jlenia Brunetti
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | | | - Raquel Gracia
- CIDETEC, Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, Spain
| | - Marco Marradi
- CIDETEC, Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, Spain
| | - Iraida Loinaz
- CIDETEC, Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, Spain
| | - Christina Ziemann
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Hannover, Germany
| | - Unai Cossío
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), San Sebastian, Spain
| | - Jordi Llop
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), San Sebastian, Spain
- Centro de Investigación Biomédica en red Enfermedades Respiratorias – CIBERES, Madrid, Spain
| | - Luisa Bracci
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Alessandro Pini
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
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119
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Lindemann WR, Evans ED, Mijalis AJ, Saouaf OM, Pentelute BL, Ortony JH. Quantifying residue-specific conformational dynamics of a highly reactive 29-mer peptide. Sci Rep 2020; 10:2597. [PMID: 32054898 PMCID: PMC7018720 DOI: 10.1038/s41598-020-59047-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 01/22/2020] [Indexed: 11/19/2022] Open
Abstract
Understanding structural transitions within macromolecules remains an important challenge in biochemistry, with important implications for drug development and medicine. Insight into molecular behavior often requires residue-specific dynamics measurement at micromolar concentrations. We studied MP01-Gen4, a library peptide selected to rapidly undergo bioconjugation, by using electron paramagnetic resonance (EPR) to measure conformational dynamics. We mapped the dynamics of MP01-Gen4 with residue-specificity and identified the regions involved in a structural transformation related to the conjugation reaction. Upon reaction, the conformational dynamics of residues near the termini slow significantly more than central residues, indicating that the reaction induces a structural transition far from the reaction site. Arrhenius analysis demonstrates a nearly threefold decrease in the activation energy of conformational diffusion upon reaction (8.0 kBT to 3.4 kBT), which occurs across the entire peptide, independently of residue position. This novel approach to EPR spectral analysis provides insight into the positional extent of disorder and the nature of the energy landscape of a highly reactive, intrinsically disordered library peptide before and after conjugation.
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Affiliation(s)
- William R Lindemann
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States
| | - Ethan D Evans
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, United States
| | - Alexander J Mijalis
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Olivia M Saouaf
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Stanford, California, 94305, United States
| | - Bradley L Pentelute
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States
| | - Julia H Ortony
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139, United States.
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120
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Deigin V, Ksenofontova O, Yatskin O, Goryacheva A, Ignatova A, Feofanov A, Ivanov V. Novel platform for the preparation of synthetic orally active peptidomimetics with hemoregulating activity. II. Hemosuppressor activity of 2,5-diketopiperazine-based cyclopeptides. Int Immunopharmacol 2020; 81:106185. [PMID: 32058926 DOI: 10.1016/j.intimp.2020.106185] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/30/2019] [Accepted: 01/01/2020] [Indexed: 12/17/2022]
Abstract
The novel chemical platform formed by the branched piperazine-2,5-dione peptide derivatives (2,5-diketopiperazines) for creating non-invasive biologically active peptidomimetics has been developed. A successful application of this approach to orally available hemostimulatory peptidomimetics was demonstrated for all-L cyclopeptide from the Glu-Trp-peptide family. In the 1980s, we have separated and characterized a number of dipeptides from the thymus homogenate. The most active peptide Glu-Trp has been studied and developed into the immunostimulating drug Thymogen. The inversion of the amino acid optical form endows the dipeptides with suppressor properties: D-Glu-D-Trp-OH and D-Glu-(D-Trp)-OH, inhibit proliferation of hemopoietic progenitors in the intact bone marrow. Based on the peptide D-Glu-(D-Trp)-OH, the new immunosuppressive drug Thymodepressin has been prepared. In this work, we applied the platform mentioned above to the design and synthesis of orally active hemosuppressive Thymodepressin® analogs. The novel data for the hemosuppressor activity of the dipeptide D-Glu(D-Trp-OH)-OH and its cyclopeptide analogs are discussed. A new example is presented of a rare phenomenon when enantiomeric molecules demonstrate reciprocal (i.e., opposite) biological activities.
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Affiliation(s)
- Vladislav Deigin
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow 117997, Russia.
| | - Olga Ksenofontova
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Oleg Yatskin
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Alexandra Goryacheva
- Tsyb Medical Radiological Research Center Ministry of Health of Russia, 249030, Kaluga Region, Obninsk, Russia
| | - Anastasia Ignatova
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow 117997, Russia; Biological Faculty, Lomonosov Moscow State University, Vorobyevi Gori 1, Moscow 119992, Russia
| | - Alexey Feofanov
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow 117997, Russia; Biological Faculty, Lomonosov Moscow State University, Vorobyevi Gori 1, Moscow 119992, Russia
| | - Vadim Ivanov
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow 117997, Russia
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121
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Pal VK, Jain R, Roy S. Tuning the Supramolecular Structure and Function of Collagen Mimetic Ionic Complementary Peptides via Electrostatic Interactions. Langmuir 2020; 36:1003-1013. [PMID: 31865708 DOI: 10.1021/acs.langmuir.9b02941] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Collagen, the most abundant component of natural ECM, has attracted interest of scientific communities to replicate its multihierarchical self-assembling structure. Recent developments in collagen mimetic peptides were inclined toward the production of self-assembling short peptides capable of mimicking complex higher order structures with tunable mechanical properties. Here, we report for the first time, the crucial molecular design of oppositely charged collagen mimetic shortest bioactive pentapeptide sequences, as a minimalistic building block for development of next-generation biomaterials. Our rational design involves synthesis of two pentapeptides, where the fundamental molecular motif of collagen, that is, Gly-X-Y has been mutated at the central position with positively charged, lysine, and negatively charged, aspartate, residues. Depending on their overall surface charge, these peptides showed high propensity to form self-supporting hydrogel either at acidic or basic pH, which limits their biomedical applications. Interestingly, simple mixing of the two peptides was found to induce the coassembly of these designed peptides, which drives the formation of self-supporting hydrogel at physiological pH and thus enhanced the potential of exploring these peptides for biomedical purposes. This coassembly of ionic peptides was accompanied by the enhancement in the mechanical stiffness of the gels and reduction in overall zeta potential of the combined hydrogel, which provides the evidence for additional electrostatic interactions. Furthermore, the thixotropic nature of these gels offers an additional advantage of exploration of designer biomaterials as injectable gels. The nanofibers of coassembled hydrogel were found to be highly biocompatible to the fibroblast cells compared to the individual peptides, which was evident from their cytotoxicity studies. We anticipate that our rational design of ECM protein mimics in the form of short bioactive peptides will contribute significantly to the development of novel biomaterials and play a crucial role in the field of tissue engineering and regenerative medicines.
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Affiliation(s)
- Vijay Kumar Pal
- Institute of Nano Science and Technology , Habitat Centre, Sector 64, Phase 10 , Mohali , Punjab 160062 , India
| | - Rashmi Jain
- Institute of Nano Science and Technology , Habitat Centre, Sector 64, Phase 10 , Mohali , Punjab 160062 , India
| | - Sangita Roy
- Institute of Nano Science and Technology , Habitat Centre, Sector 64, Phase 10 , Mohali , Punjab 160062 , India
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Abstract
The rapid increase in multidrug-resistant pathogens is a major health concern that could bring mankind back to the pre-antibiotic era. Streptococcus pneumoniae is a highly recombinogenic opportunistic pathogen that causes a variety of deadly diseases and rapidly develops resistance to current antibiotic treatments. S. pneumoniae pathogenicity is dependent on a cell-density communication mechanism, or quorum sensing (QS), termed the competence regulon. In this work, we set out to design signal-based QS modulators capable of affecting the two specificity groups found in S. pneumoniae. Through systematic analysis and rational design, we were able to construct peptide-based pan-group QS activators and inhibitors with activities in the nanomolar range. These novel analogues are privileged scaffolds for the development of anti-virulence therapeutics against S. pneumoniae infections.
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Affiliation(s)
- Bimal Koirala
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada, 89557, United States
| | - Yftah Tal-Gan
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada, 89557, United States
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Sugiura T, Kanada T, Mori D, Sakai H, Shibata A, Kitamura Y, Ikeda M. Chemical stimulus-responsive supramolecular hydrogel formation and shrinkage of a hydrazone-containing short peptide derivative. Soft Matter 2020; 16:899-906. [PMID: 31829395 DOI: 10.1039/c9sm01969c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Artificial supramolecular nanostructures showing transient properties have attracted significant attention in recent years. New discoveries in this area may provide insights into a better understanding of the sophisticated organization of complex biomolecular systems. Nevertheless, research concerning such materials is still limited. Better knowledge of the chemical reactivity and corresponding molecular transformations of self-assembling molecules, which guide their assembly/disassembly, may provide an opportunity to construct transient supramolecular nanostructures capable of showing chemical stimulus responsiveness. Herein, we report a short peptide derivative containing a hydrazone bond, which shows transient hydrogel formation (no only sol-to-gel but also gel-to-shrunken gel phase transition) accompanied by continuous transformation and growth of supramolecular nanostructures triggered by hydrazone-oxime exchange reaction in response to hydroxylamine. Such controlled shrinkage behavior of supramolecular hydrogels in response to specific chemical stimuli has rarely been explored compared with conventional polymer hydrogel systems.
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Affiliation(s)
- Takumi Sugiura
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Takurou Kanada
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Daisuke Mori
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Hiroyuki Sakai
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Aya Shibata
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Yoshiaki Kitamura
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Masato Ikeda
- Department of Life Science and Chemistry, Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan. and United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan and Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University (G-CHAIN), 1-1 Yanagido, Gifu 501-1193, Japan and Institute of Nano-Life-Systems, Institute of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
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An HW, Hou D, Zheng R, Wang MD, Zeng XZ, Xiao WY, Yan TD, Wang JQ, Zhao CH, Cheng LM, Zhang JM, Wang L, Wang ZQ, Wang H, Xu W. A Near-Infrared Peptide Probe with Tumor-Specific Excretion-Retarded Effect for Image-Guided Surgery of Renal Cell Carcinoma. ACS Nano 2020; 14:927-936. [PMID: 31927974 DOI: 10.1021/acsnano.9b08209] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Image-guided surgery plays a crucial role in realizing complete tumor removal, reducing postoperative recurrence and increasing patient survival. However, imaging of tumor lesion in the typical metabolic organs, e.g., kidney and liver, still has great challenges due to the intrinsic nonspecific accumulation of imaging probes in those organs. Herein, we report an in situ self-assembled near-infrared (NIR) peptide probe with tumor-specific excretion-retarded (TER) effect in tumor lesions, enabling high-performance imaging of human renal cell carcinoma (RCC) and achieving complete tumor removal, ultimately reducing postoperative recurrence. The NIR peptide probe first specifically recognizes αvβ3 integrin overexpressed in renal cancer cells, then is cleaved by MMP-2/9, which is up-regulated in the tumor microenvironment. The probe residue spontaneously self-assembles into nanofibers that exhibit an excretion-retarded effect in the kidney, which contributes to a high signal-to-noise (S/N) ratio in orthotopic RCC mice. Intriguingly, the TER effect also enables precisely identifying eye-invisible tiny lesions (<1 mm), which contributes to complete tumor removal and significantly reduces the postoperative recurrence compared with traditional surgery. Finally, the TER strategy is successfully employed in high-performance identification of human RCC in an ex vivo kidney perfusion model. Taken together, this NIR peptide probe based on the TER strategy is a promising method for detecting tumors in metabolic organs in diverse biomedical applications.
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Affiliation(s)
- Hong-Wei An
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics , Yuquan Road , Beijing , 100049 , China
| | - Dayong Hou
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Rui Zheng
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
| | - Man-Di Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
| | - Xiang-Zhong Zeng
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
| | - Wu-Yi Xiao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
| | - Tong-Da Yan
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
| | - Jia-Qi Wang
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Chang-Hao Zhao
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Li-Ming Cheng
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Jin-Ming Zhang
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Lu Wang
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Zi-Qi Wang
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Hao Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology (NCNST) , Beijing , 100190 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
| | - Wanhai Xu
- Department of Urology , Fourth Hospital of Harbin Medical University, Heilongjiang Key Laboratory of Scientific Research in Urology , Harbin , 150001 , China
- NHC Key Laboratory of Molecular Probes and Targeted Diagnosis and Therapy , Harbin Medical University , Harbin , 150001 , China
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Aldilla VR, Chen R, Martin AD, Marjo CE, Rich AM, Black DS, Thordarson P, Kumar N. Anthranilamide-based Short Peptides Self-Assembled Hydrogels as Antibacterial Agents. Sci Rep 2020; 10:770. [PMID: 31964927 PMCID: PMC6972728 DOI: 10.1038/s41598-019-57342-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/23/2019] [Indexed: 12/26/2022] Open
Abstract
In this study, we describe the synthesis and molecular properties of anthranilamide-based short peptides which were synthesised via ring opening of isatoic anhydride in excellent yields. These short peptides were incorporated as low molecular weight gelators (LMWG), bola amphiphile, and C3-symmetric molecules to form hydrogels in low concentrations (0.07-0.30% (w/v)). The critical gel concentration (CGC), viscoelastic properties, secondary structure, and fibre morphology of these short peptides were influenced by the aromaticity of the capping group or by the presence of electronegative substituent (namely fluoro) and hydrophobic substituent (such as methyl) in the short peptides. In addition, the hydrogels showed antibacterial activity against S. aureus 38 and moderate toxicity against HEK cells in vitro.
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Affiliation(s)
- Vina R Aldilla
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Renxun Chen
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Adam D Martin
- Dementia Research Centre, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, 2109, Australia.
| | - Christopher E Marjo
- Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Anne M Rich
- Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - David StC Black
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Pall Thordarson
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Naresh Kumar
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia.
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126
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Xia C, Wang Y, Liu C, Wang L, Gao X, Li D, Qi W, An R, Xu H. Novel Peptide CM 7 Targeted c-Met with Antitumor Activity. Molecules 2020; 25:molecules25030451. [PMID: 31973231 PMCID: PMC7038139 DOI: 10.3390/molecules25030451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/21/2019] [Accepted: 01/06/2020] [Indexed: 02/07/2023] Open
Abstract
Anomalous changes of the cell mesenchymal–epithelial transition factor (c-Met) receptor tyrosine kinase signaling pathway play an important role in the occurrence and development of human cancers, including gastric cancer. In this study, we designed and synthesized a novel peptide (CM 7) targeting the tyrosine kinase receptor c-Met, that can inhibit c-Met-mediated signaling in MKN-45 and U87 cells. Its affinity to human c-Met protein or c-Met-positive cells was determined, which showed specific binding to c-Met with high affinity. Its biological activities against MKN-45 c-Met-positive cells were evaluated in vitro and in vivo. As a result, peptide CM 7 exhibited moderate regulation of c-Met-mediated cell proliferation, migration, invasion, and scattering. The inhibitory effect of peptide CM 7 on tumor growth in vivo was investigated by establishing a xenograft mouse model using MKN-45 cells, and the growth inhibition rate of tumor masses for peptide CM 7 was 62%. Based on our data, CM 7 could be a promising therapeutic peptide for c-Met-dependent cancer patients.
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Affiliation(s)
- Chunlei Xia
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Ying Wang
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Chen Liu
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Liwen Wang
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Xinmei Gao
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Dongping Li
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Weiyan Qi
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Roujin An
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Hanmei Xu
- The Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation, Jiangsu Province, China Pharmaceutical University, Nanjing 211198, China; (C.X.); (Y.W.); (C.L.); (L.W.); (X.G.); (D.L.); (W.Q.); (R.A.)
- Department of Marine Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, Ministry of Education, China Pharmaceutical University, Nanjing 211198, China
- Correspondence: ; Tel.: +86-139-139-25346; Fax: +86-025-86185437
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Luo J, Cheng Y, Gong ZW, Wu K, Zhou Y, Chen HX, Gauthier M, Cheng YZ, Liang J, Zou T. Self-Assembled Peptide Functionalized Gold Nanopolyhedrons with Excellent Chiral Optical Properties. Langmuir 2020; 36:600-608. [PMID: 31885276 DOI: 10.1021/acs.langmuir.9b03366] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Because of the unique optical properties of gold nanomaterials, the preparation of gold nanomaterials with excellent chirality has received extensive attention. In order to develop a simple fabrication method for three-dimensional chiral Au nanostructures with a size of several hundred nanometers, chiral gold nanoparticles were developed to transfer chirality of a peptide to gold nanoparticles. In this study, the controlled synthesis of asymmetric gold nanopolyhedrons was achieved. The asymmetric gold nanopolyhedrons prepared via peptide-directed growth can exhibit strong circular dichroism (∼±50 mdeg) couplets in the visible range (500-600 nm). Also, the morphology of chiral Au nanododecahedrons-peptide particles showed distorted and asymmetric properties. In order to prove that the size and spatial structure of gold nanopolyhedrons have an influence on their chiral optical properties, Au nanotrioctahedron-peptide particles were prepared by using Au nanotrioctahedrons with different morphologies. Au nanotrioctahedron-peptide particles also exhibited circular dichromatic couplets in the visible region.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Ju Liang
- Chemical Engineering and Pharmaceutics School , Henan University of Science and Technology , Luoyang 471023 , P. R. China
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Alcaide-Hidalgo JM, Romero M, Duarte J, López-Huertas E. Antihypertensive Effects of Virgin Olive Oil (Unfiltered) Low Molecular Weight Peptides with ACE Inhibitory Activity in Spontaneously Hypertensive Rats. Nutrients 2020; 12:nu12010271. [PMID: 31968696 PMCID: PMC7019360 DOI: 10.3390/nu12010271] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 01/15/2023] Open
Abstract
The low molecular weight peptide composition of virgin olive oil (VOO) is mostly unknown. We hypothesised that unfiltered VOO could possess low molecular weight peptides with antihypertensive activity. We produced unfiltered VOO and obtained a water-soluble peptide extract from it. The peptides were separated by size-exclusion using fast protein liquid chromatography, and the low molecular weight fraction was analysed by nanoscale liquid chromatography-Orbitrap coupled with tandem mass spectrometry and de novo sequencing. We selected 23 peptide sequences containing between 6 and 9 amino acids and molecular masses ranging 698–1017 Da. Those peptides were chemically synthesised and their angiotensin-converting enzyme (ACE) inhibitory activity was studied in vitro. Seven peptides showed a strong activity, with half maximal inhibitory concentration (IC50) <10 µm. The antihypertensive effects of the four most active synthesised ACE inhibitor peptides were studied in spontaneously hypertensive rats (SHR). Acute oral administration of synthetic peptides RDGGYCC and CCGNAVPQ showed antihypertensive activity in SHR. We conclude that unfiltered VOO naturally contains low molecular weight peptides with specific ACE inhibitory activity and antihypertensive effects in SHR.
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Affiliation(s)
- Juan María Alcaide-Hidalgo
- Group of Antioxidants and Free Radicals in Biotechnology, Food and Agriculture, Estación Experimental Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Profesor Albareda 1, 18008 Granada, Spain;
| | - Miguel Romero
- Pharmacology Department, Faculty of Pharmacy, University of Granada, CIBER-Enfermedades Cardiovasculares (CiberCV), 18071 Granada, Spain; (M.R.); (J.D.)
| | - Juan Duarte
- Pharmacology Department, Faculty of Pharmacy, University of Granada, CIBER-Enfermedades Cardiovasculares (CiberCV), 18071 Granada, Spain; (M.R.); (J.D.)
| | - Eduardo López-Huertas
- Group of Antioxidants and Free Radicals in Biotechnology, Food and Agriculture, Estación Experimental Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Profesor Albareda 1, 18008 Granada, Spain;
- Correspondence: ; Tel.: +34-958-181600 (ext. 181); Fax: +34-958-181609
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Spodzieja M, Kuncewicz K, Sieradzan A, Karczyńska A, Iwaszkiewicz J, Cesson V, Węgrzyn K, Zhukov I, Maszota-Zieleniak M, Michielin O, Speiser DE, Zoete V, Derré L, Rodziewicz-Motowidło S. Disulfide-Linked Peptides for Blocking BTLA/HVEM Binding. Int J Mol Sci 2020; 21:ijms21020636. [PMID: 31963646 PMCID: PMC7013932 DOI: 10.3390/ijms21020636] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 12/26/2022] Open
Abstract
Immune checkpoints are crucial in the maintenance of antitumor immune responses. The activation or blockade of immune checkpoints is dependent on the interactions between receptors and ligands; such interactions can provide inhibitory or stimulatory signals, including the enhancement or suppression of T-cell proliferation, differentiation, and/or cytokine secretion. B-and T-lymphocyte attenuator (BTLA) is a lymphoid-specific cell surface receptor which is present on T-cells and interacts with herpes virus entry mediator (HVEM), which is present on tumor cells. The binding of HVEM to BTLA triggers an inhibitory signal which attenuates the immune response. This feature is interesting for studying the molecular interactions between HVEM and BTLA, as they may be targeted for novel immunotherapies. This work was based on the crystal structure of the BTLA/HVEM complex showing that BTLA binds the N-terminal cysteine-rich domain of HVEM. We investigated the amino acid sequence of HVEM and used molecular modeling methods to develop inhibitors of the BTLA/HVEM interaction. We synthesized novel compounds and determined their ability to interact with the BTLA protein and inhibit the formation of the BTLA/HVEM complex. Our results suggest that the HVEM (14-39) peptide is a potent inhibitor of the formation of the BTLA/HVEM protein complex.
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Affiliation(s)
- Marta Spodzieja
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80–308 Gdańsk, Poland; (M.S.); (K.K.); (A.S.); (A.K.); (M.M.-Z.)
| | - Katarzyna Kuncewicz
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80–308 Gdańsk, Poland; (M.S.); (K.K.); (A.S.); (A.K.); (M.M.-Z.)
| | - Adam Sieradzan
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80–308 Gdańsk, Poland; (M.S.); (K.K.); (A.S.); (A.K.); (M.M.-Z.)
| | - Agnieszka Karczyńska
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80–308 Gdańsk, Poland; (M.S.); (K.K.); (A.S.); (A.K.); (M.M.-Z.)
| | - Justyna Iwaszkiewicz
- SIB Swiss Institute of Bioinformatics, Quartier Sorge, Bâtiment Amphipole, CH-1015 Lausanne, Switzerland; (J.I.); (O.M.); (V.Z.)
| | - Valérie Cesson
- Urology Research Unit, Urology Department, University Hospital of Lausanne (CHUV), CH-1011 Lausanne, Switzerland;
| | - Katarzyna Węgrzyn
- Intercollegiate Faculty of Biotechnology UG&MUG, University of Gdansk, Abrahama 58, 80–308 Gdańsk, Poland;
| | - Igor Zhukov
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02–106 Warszawa, Poland;
- NanoBioMedical Center, Adam Mickiewicz University, Umultowska 85, 61–614 Poznań, Poland
| | - Martyna Maszota-Zieleniak
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80–308 Gdańsk, Poland; (M.S.); (K.K.); (A.S.); (A.K.); (M.M.-Z.)
| | - Olivier Michielin
- SIB Swiss Institute of Bioinformatics, Quartier Sorge, Bâtiment Amphipole, CH-1015 Lausanne, Switzerland; (J.I.); (O.M.); (V.Z.)
- Department of Oncology, University Hospital of Lausanne (CHUV), Ludwig Cancer Research—Lausanne Branch, CH-1011 Lausanne, Switzerland
| | - Daniel E. Speiser
- Department of Oncology, University of Lausanne, Ch. des Boveresses 155, CH-1066 Lausanne, Switzerland;
| | - Vincent Zoete
- SIB Swiss Institute of Bioinformatics, Quartier Sorge, Bâtiment Amphipole, CH-1015 Lausanne, Switzerland; (J.I.); (O.M.); (V.Z.)
- Department of Fundamental Oncology, Lausanne University, Ludwig Institute for Cancer Research, Route de la Corniche 9A, CH-1066 Epalinges, Switzerland
| | - Laurent Derré
- Urology Research Unit, Urology Department, University Hospital of Lausanne (CHUV), CH-1011 Lausanne, Switzerland;
- Correspondence: (L.D.); (S.R.-M.)
| | - Sylwia Rodziewicz-Motowidło
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80–308 Gdańsk, Poland; (M.S.); (K.K.); (A.S.); (A.K.); (M.M.-Z.)
- Correspondence: (L.D.); (S.R.-M.)
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130
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Gao Q, Li X, Yu W, Jia F, Yao T, Jin Q, Ji J. Fabrication of Mixed-Charge Polypeptide Coating for Enhanced Hemocompatibility and Anti-Infective Effect. ACS Appl Mater Interfaces 2020; 12:2999-3010. [PMID: 31845798 DOI: 10.1021/acsami.9b19335] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Medical catheters are prone to fouling by protein adsorption and platelet adhesion/activation due to their hydrophobic surface, resulting in bacterial adhesion/biofilm formation, associated infection, and thrombosis. Hence, an ultralow-fouling and exceptional infection-resistant coating on devices is urgently needed. Herein, we synthesized mussel-inspired cationic polypeptide (cPep) and mixed-charge polypeptide (mPep) via an N-carboxyanhydride ring opening polymerization method. In the view of the chemical structure, in addition to the catechol group of levodopa, the cationic group of l-lysine (K), and the hydrophobic group of l-phenylalanine (F), the mPep, comparing with cPep, contains the anionic group of l-glutamic acid (E) since the negatively charge amino acid sequence is newly introduced, so as to guarantee its bactericidal ability, low toxicity, and surface self-deposition. Both cPep and mPep coatings are conveniently obtained by a dopamine-assisted codeposition technique. Compared with the cPep coating, the mPep coating has a similar antibacterial activity level (>99%) against methicillin-resistant Staphylococcus aureus and Pseudomonas aeruginosa. Meanwhile, it is demonstrated that the mPep coating has most effective antibiofilm activity (>3 days) and protein/platelet-resistant ability in vitro, as well as improving hemocompatibility. Furthermore, the mPep-coated silicone catheter induces no inflammatory response and significantly lowers the bacterial cell number with 6 log reduction in a mouse model of infection. Consequently, the rationally designed mPep with a simple coating technique has great potential in combating against medical catheter-related clinical infections.
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Affiliation(s)
- Qiang Gao
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Xu Li
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Weijiang Yu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Fan Jia
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Tiantian Yao
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Qiao Jin
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Jian Ji
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
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131
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Perinelli M, Guerrini R, Albanese V, Marchetti N, Bellotti D, Gentili S, Tegoni M, Remelli M. Cu(II) coordination to His-containing linear peptides and related branched ones: Equalities and diversities. J Inorg Biochem 2020; 205:110980. [PMID: 31931375 DOI: 10.1016/j.jinorgbio.2019.110980] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 12/13/2019] [Accepted: 12/24/2019] [Indexed: 01/20/2023]
Abstract
The two branched peptides (AAHAWG)4-PWT2 and (HAWG)4-PWT2 where synthesized by mounting linear peptides on a cyclam-based scaffold (PWT2), provided with four maleimide chains, through a thio-Michael reaction. The purpose of this study was primarily to verify if the two branched ligands had a Cu(II) coordination behavior reproducing that of the single-chain peptides, namely AAHAWG-NH2, which bears an Amino Terminal Cu(II)- and Ni(II)-Binding (ATCUN) Motif, and HAWG-NH2, which presents a His residue as the N-terminal amino acid, in a wide pH range. The study of Cu(II) binding was performed by potentiometric, spectroscopic (UV-vis absorption, CD, fluorescence) and ESI-MS techniques. ATCUN-type ligands ((AAHAWG)4-PWT2 and AAHAWG-NH2) were confirmed to bind one Cu(II) per peptide fragment at both pH 7.4 and pH 9.0, with a [NH2, 2N-, NIm] coordination mode. On the other hand, the ligand HAWG-NH2 forms a [CuL2]2+ species at neutral pH, while, at pH 9, the formation of 1:2 Cu(II):ligand adducts is prevented by amidic nitrogen deprotonation and coordination, to give rise solely to 1:1 species. Conversely, Cu(II) binding to (HAWG)4-PWT2 resulted in the formation of 1:2 copper:peptide chain also at pH 9: hence, through the latter branched peptide we obtained, at alkaline pH, the stabilization of a specific Cu(II) coordination mode which results unachievable using the corresponding single-chain peptide. This behavior could be explained in terms of high local peptide concentration on the basis of the speciation of the Cu(II)/single-chain peptide systems.
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Affiliation(s)
- Monica Perinelli
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Remo Guerrini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Valentina Albanese
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Nicola Marchetti
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Denise Bellotti
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Silvia Gentili
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Matteo Tegoni
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy.
| | - Maurizio Remelli
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy.
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132
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Yin W, Li W, Li Q, Liu Y, Liu J, Ren M, Ma Y, Zhang Z, Zhang X, Wu Y, Jiang S, Zhang XE, Cui Z. Real-time imaging of individual virion-triggered cortical actin dynamics for human immunodeficiency virus entry into resting CD4 T cells. Nanoscale 2020; 12:115-129. [PMID: 31773115 DOI: 10.1039/c9nr07359k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Real-time imaging of single virus particles allows the visualization of subtle dynamic events of virus-host interaction. During the human immunodeficiency virus (HIV) infection of resting CD4 T lymphocytes, overcoming cortical actin restriction is an essential step, but the dynamic process and mechanism remain to be characterized. Herein, by using quantum dot (QD) encapsulated fluorescent viral particles and single-virus tracking, we explored detailed scenarios of HIV dynamic entry and crossing the cortical actin barrier. The fine-scale temporal and spatial processes of single HIV virion interaction with the cortical actin were studied in depth during virus entry via plasma membrane fusion. Individual HIV virions modulate the subtle rearrangement of the cortical actin barrier to open a door to facilitate viral entry. The actin-binding protein, α-actinin, was found to be critical for actin dynamics during HIV entry. An α-actinin-derived peptide, actin-binding site 1 peptide (ABS1p), was developed to block HIV infection. Our findings reveal an α-actinin-mediated dynamic cortical actin rearrangement for HIV entry, and identify an antiviral target as well as a corresponding peptide inhibitor based on HIV interaction with the actin cytoskeleton.
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Affiliation(s)
- Wen Yin
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China. and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Wei Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
| | - Qin Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
| | - Yuanyuan Liu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China. and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Ji Liu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China. and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Min Ren
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China. and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yingxin Ma
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
| | - Zhiping Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
| | - Xiaowei Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
| | - Yuntao Wu
- National Center for Biodefense and Infectious Diseases, Department of Molecular and Microbiology, George Mason University, Manassas, Virginia 22030, USA
| | - Shibo Jiang
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, Shanghai Medical College and Institute of Medical Microbiology, Fudan University, Shanghai 200032, People's Republic of China
| | - Xian-En Zhang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Zongqiang Cui
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
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133
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Abstract
The application of designer peptides in medicinal chemistry, chemical biology, and materials science has generated new interest in synthetic methods for the structural modification of amino acids. Strategies which facilitate the direct diversification of proteinogenic functional groups within unprotected peptide substrates are particularly attractive as they leverage modern solution- and solid-phase protocols-tools which are now both robust and routine-for the synthesis of native peptides. Accordingly, a recent approach to the decarboxylative functionalization of peptidic carboxylic acids, including aspartic/glutamic acid residues and α-carboxylic acids, has proven to be a promising new strategy for peptide modification. This synthetic method merges conventional strategies for the activation of carboxylic acids with transition metal-catalyzed cross-coupling chemistry to forge new C-C bonds for the late-stage introduction of valuable synthetic handles. This chapter details a step-by-step protocol for the activation and nickel-catalyzed decarboxylative alkylation of a simple peptide substrate to highlight the broad utility of this strategy for the synthesis of designer peptides.
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Affiliation(s)
- Meng Yao Zhang
- Research School of Chemistry, Australian National University, Canberra, ACT, Australia
| | - Lara R Malins
- Research School of Chemistry, Australian National University, Canberra, ACT, Australia.
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134
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Guidotti N, Fierz B. Semisynthesis and Reconstitution of Nucleosomes Carrying Asymmetric Histone Modifications. Methods Mol Biol 2020; 2133:263-291. [PMID: 32144672 DOI: 10.1007/978-1-0716-0434-2_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nucleosomes, the basic unit of chromatin, contain a protein core of histone proteins, which are heavily posttranslationally modified. These modifications form a combinatorial language which defines the functional state of the underlying genome. As each histone type exists in two copies in a nucleosome, the modification patterns can differ between the individual histones, resulting in asymmetry and increasing combinatorial complexity. To systematically explore the regulation of chromatin regulatory enzymes (writers, erasers, or readers), chemically defined nucleosomes are required. We have developed strategies to chemically modify histones and control nucleosome assembly, thereby enabling the reconstitution of asymmetric histone modification patterns. Here, we report a detailed protocol for the modular assembly of such nucleosomes. Employing a three-segment ligation strategy for the semisynthesis of H3, coupled with the use of the protease cleavable "lnc-tag," we provide an efficient and traceless method for the controlled semisynthesis and reconstitution of asymmetrically modified nucleosomes.
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Affiliation(s)
- Nora Guidotti
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Beat Fierz
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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135
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Singh S, Wang M, Gao R, Teng P, Odom T, Zhang E, Xu H, Cai J. Lipidated α/Sulfono-α-AA heterogeneous peptides as antimicrobial agents for MRSA. Bioorg Med Chem 2020; 28:115241. [PMID: 31812324 PMCID: PMC10523340 DOI: 10.1016/j.bmc.2019.115241] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/20/2019] [Accepted: 11/25/2019] [Indexed: 12/27/2022]
Abstract
Though antibiotics have been used for decades to treat bacterial infections, there is a great need for new treatment methods. Bacteria are becoming resistant to conventional antibiotics, as is the case with Methicillin resistant Staphylococcus aureus (MRSA). Herein we report the design of a series of lipidated α/Sulfono-α-AA heterogeneous peptides as mimics for Host Defense Peptides (HDPs). Utilizing fluorescence microscopy and depolarization techniques, our compounds demonstrate the ability to kill Gram-positive bacteria through cell membrane disruption. This mechanism of action makes it difficult for bacteria to develop resistance. Further time kill studies and hemolytic assays have also proven these compounds to be efficient in their ability to eradicate bacteria cells while remaining non-toxic to human red blood cells. This new class of peptidomimetics shows promise for the future antibiotic treatment of MRSA.
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Affiliation(s)
- Sylvia Singh
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Minghui Wang
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Ruixuan Gao
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Peng Teng
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Timothy Odom
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - En Zhang
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States; School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, PR China
| | - Hai Xu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States.
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136
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Yoshiya T. Synthesis of O-Acyl Isopeptides: Stepwise and Convergent Solid-Phase Synthesis. Methods Mol Biol 2020; 2103:129-138. [PMID: 31879922 DOI: 10.1007/978-1-0716-0227-0_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The O-acyl isopeptide method was developed for the preparation of difficult sequence-containing peptides, whose hydrophobic nature hampers both peptide chain construction on resin and purification with HPLC after deprotection. In the O-acyl isopeptide method, the target peptide is synthesized in an O-acyl isopeptide form, which contains an O-acyl isopeptide bond instead of the native N-acyl peptide bond at a hydroxy group-containing amino acid residue, such as Ser or Thr. The hydrophilic O-acyl isopeptide can be isolated, e.g., as a lyophilized TFA salt. The target peptide can be quantitatively obtained by a final O-to-N intramolecular acyl migration reaction with exposure to neutral conditions. Additionally, the O-acyl isopeptide is important as a hydrophilic precursor peptide for biological peptide assays that are difficult to handle. This chapter describes the synthesis of such O-acyl isopeptides by stepwise and convergent Fmoc solid-phase peptide synthesis.
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Affiliation(s)
- Taku Yoshiya
- Peptide Institute, Inc., Ibaraki-Shi, Osaka, Japan.
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137
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Abstract
Solubility is a key property of peptides and of central importance to the success of solid-phase peptide synthesis and subsequent peptide purification and handling. Substitution of the backbone amide bond can dramatically increase peptide solubility. Backbone amide bond protection works by preventing the formation of interchain association and can be used both to synthesize aggregation-prone peptide sequences on solid phase and to improve solubility of a peptide post synthesis. Improving peptide solubility by judicial use of backbone protection is of growing importance, particularly for chemical protein synthesis by chemical ligation.
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Affiliation(s)
| | | | | | - John Offer
- The Francis Crick Institute, London, UK.
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138
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Abstract
Solution phase synthesis was the first developed and the only method for peptide synthesis until the solid phase peptide synthesis (SPPS) introduced by Merrifield revolutionized the way peptides and their analogues are prepared nowadays. However, some peptides because of their chemical structure cannot be synthetized by SPPS, and the "old school" technique is still favorable to make them. Biphalin is a good example. It was first synthesized by Lipkowski almost 40 years ago as a dimeric analogue of enkephalin in which two tetra-amino acid fragments (Tyr-D-Ala-Gly-Phe-) are joined tail to tail by a hydrazide bridge. The synthesis of this octapeptide (Tyr-D-Ala-Gly-Phe-NH-NH ← Phe ← Gly ← D-Ala ← Tyr) and its analogues requires synthesis in solution because routine synthesis on a polymeric support is not possible. Biphalin shows high affinity at both μ and δ opioid receptors and produces a more robust spinal analgesia than morphine after intrathecal administration. Although biphalin and its analogues have been already deeply investigated, a complete description for its analgesic activity is not yet available.Here, we present a detailed procedure for the solution phase synthesis of biphalin.
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Affiliation(s)
- Dagmara Tymecka
- Faculty of Chemistry, University of Warsaw, Pasteura, Warsaw, Poland.
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139
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Abstract
Glycosylation is one of the most common posttranslational modifications of proteins and can exert profound effects on the inherent properties and biological functions of a given protein. Structurally well-defined homogeneous glycopeptides are highly demanded for functional studies and biomedical applications. Various chemical and chemoenzymatic methods have been reported so far for synthesizing different N- and O-glycopeptides. Among them, the chemoenzymatic method based on an endoglycosidase-catalyzed ligation of free N-glycans and GlcNAc-tagged peptides is emerging as a highly efficient method for constructing large complex N-glycopeptides. This chemoenzymatic approach consists of two key steps. The first step is to prepare the GlcNAc peptide through automated solid-phase peptide synthesis (SPPS) by incorporating an Asn-linked GlcNAc moiety at a predetermined glycosylation site; and the second step is to transfer an N-glycan from the corresponding N-glycan oxazoline en bloc to the GlcNAc peptide by an endoglycosidase or its efficient glycosynthase mutant. In this chapter, we provide detailed procedures of this chemoenzymatic method by demonstrating the synthesis of two HIV-1 V3 glycopeptide antigens carrying a high-mannose-type and a complex-type N-glycan, respectively. The described procedures should be generally applicable for the synthesis of other biologically important N-glycopeptides.
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Affiliation(s)
- Guanghui Zong
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA
| | - Chao Li
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA
| | - Lai-Xi Wang
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA.
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140
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Ui T, Ueda M, Higaki Y, Kamino S, Sano K, Kimura H, Saji H, Enomoto S. Development and characterization of a 68Ga-labeled A20FMDV2 peptide probe for the PET imaging of αvβ6 integrin-positive pancreatic ductal adenocarcinoma. Bioorg Med Chem 2020; 28:115189. [PMID: 31740201 DOI: 10.1016/j.bmc.2019.115189] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/25/2019] [Accepted: 10/27/2019] [Indexed: 01/29/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is known to be one of the most lethal cancers. Since the majority of patients are diagnosed at an advanced stage, development of a detection method for PDAC at an earlier stage of disease progression is strongly desirable. Integrin αVβ6 is a promising target for early PDAC detection because its expression increases during precancerous changes. The present study aimed to develop an imaging probe for positron emission tomography (PET) which targets αVβ6 integrin-positive PDAC. We selected A20FMDV2 peptide, which binds specifically to αvβ6 integrin, as a probe scaffold, and 68Ga as a radioisotope. A20FMDV2 peptide has not been previously labeled with 68Ga. A cysteine residue was introduced to the N-terminus of the probe at a site-specific conjugation of maleimide-NOTA (mal-NOTA) chelate. Different numbers of glycine residues were also introduced between cysteine and the A20FMDV2 sequence as a spacer in order to reduce the steric hindrance of the mal-NOTA on the binding probe to αVβ6 integrin. In vitro, the competitive binding assay revealed that probes containing a 6-glycine linker ([natGa]CG6 and [natGa]Ac-CG6) showed high affinity to αVβ6 integrin. Both probes could be labeled by 67/68Ga with high radiochemical yield (>50%) and purity (>98%). On biodistribution analysis, [67Ga]Ac-CG6 showed higher tumor accumulation, faster blood clearance, and lower accumulation in the surrounding organs of pancreas than did [67Ga]CG6. The αVβ6 integrin-positive xenografts were clearly visualized by PET imaging with [68Ga]Ac-CG6. The intratumoral distribution of [68Ga]Ac-CG6 coincided with the αVβ6 integrin-positive regions detected by immunohistochemistry. Thus, [68Ga]Ac-CG6 is a useful peptide probe for the imaging of αVβ6 integrin in PDAC.
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Affiliation(s)
- Takashi Ui
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Masashi Ueda
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
| | - Yusuke Higaki
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Shinichiro Kamino
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Kohei Sano
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroyuki Kimura
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideo Saji
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shuichi Enomoto
- RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
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141
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Abstract
Peptide analogs modified with a phosphorus-based moiety (phosphonate, phosphonamidate, or phosphinate) have emerged as invaluable tools in fundamental and medicinal, mechanistic, and inhibitory studies of proteolytic enzymes and other catalytic proteins that process the amino acids and peptides. The first stages of the chemical synthesis of these compounds frequently involve formation of peptide or pseudopeptide bond between a suitably protected α-amino acid and an α-aminoalkyl phosphorus derivative. These preparative protocols are distinct from conventional solution and solid-phase peptide syntheses that have become routine and automatized. In the following chapter, we describe in details the methods and techniques utilized to perform this nonstandard coupling and to obtain P-terminal dipeptidyl phosphonates and pseudodipeptides containing the internal phosphonamidate or phosphinate linkages. Methods of products' purification, the deprotection conditions, and stability issues are also presented and discussed.
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Affiliation(s)
- Artur Mucha
- Department of Bioorganic Chemistry, Wrocław University of Science and Technology, Wrocław, Poland.
| | - Paweł Kafarski
- Department of Bioorganic Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
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142
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Lambraño J, Curtidor H, Avendaño C, Díaz-Arévalo D, Roa L, Vanegas M, Patarroyo ME, Patarroyo MA. Preliminary Evaluation of the Safety and Immunogenicity of an Antimalarial Vaccine Candidate Modified Peptide (IMPIPS) Mixture in a Murine Model. J Immunol Res 2019; 2019:3832513. [PMID: 32083140 PMCID: PMC7012257 DOI: 10.1155/2019/3832513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 12/03/2019] [Indexed: 11/22/2022] Open
Abstract
Malaria continues being a high-impact disease regarding public health worldwide; the WHO report for malaria in 2018 estimated that ~219 million cases occurred in 2017, mostly caused by the parasite Plasmodium falciparum. The disease cost the lives of more than 400,000 people, mainly in Africa. In spite of great efforts aimed at developing better prevention (i.e., a highly effective vaccine), diagnosis, and treatment methods for malaria, no efficient solution to this disease has been advanced to date. The Fundación Instituto de Inmunología de Colombia (FIDIC) has been developing studies aimed at furthering the search for vaccine candidates for controlling P. falciparum malaria. However, vaccine development involves safety and immunogenicity studies regarding their formulation in animal models before proceeding to clinical studies. The present work has thus been aimed at evaluating the safety and immunogenicity of a mixture of 23 chemically synthesised, modified peptides (immune protection-inducing protein structure (IMPIPS)) derived from different P. falciparum proteins. Single and repeat dose assays were thus used with male and female BALB/c mice which were immunised with the IMPIPS mixture. It was found that single and repeat dose immunisation with the IMPIPS mixture was safe, both locally and systemically. It was observed that the antibodies so stimulated recognised the parasite's native proteins and inhibited merozoite invasion of red blood cells in vitro when evaluating the humoral immune response induced by the IMPIPS mixture. Such results suggested that the IMPIPS peptide mixture could be a safe candidate to be tested during the next stage involved in developing an antimalarial vaccine, evaluating local safety, immunogenicity, and protection in a nonhuman primate model.
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Affiliation(s)
- Jennifer Lambraño
- Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá, Colombia
- Master's Programme in Biochemistry, Medical School, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Hernando Curtidor
- Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá, Colombia
| | - Catalina Avendaño
- Faculty of Animal Science, Universidad de Ciencias Aplicadas y Ambientales (U.D.C.A), Bogotá, Colombia
| | - Diana Díaz-Arévalo
- Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá, Colombia
- School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, Colombia
| | - Leonardo Roa
- Faculty of Animal Science, Universidad de Ciencias Aplicadas y Ambientales (U.D.C.A), Bogotá, Colombia
| | - Magnolia Vanegas
- Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá, Colombia
| | - Manuel E. Patarroyo
- Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá, Colombia
- Pathology Department, Medical School, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Manuel A. Patarroyo
- Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá, Colombia
- School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, Colombia
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143
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Meir A, Lepechkin-Zilbermintz V, Kahremany S, Schwerdtfeger F, Gevorkyan-Airapetov L, Munder A, Viskind O, Gruzman A, Ruthstein S. Inhibiting the copper efflux system in microbes as a novel approach for developing antibiotics. PLoS One 2019; 14:e0227070. [PMID: 31887125 PMCID: PMC6936879 DOI: 10.1371/journal.pone.0227070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 12/10/2019] [Indexed: 12/13/2022] Open
Abstract
Five out of six people receive at least one antibiotic prescription per year. However, the ever-expanding use of antibiotics in medicine, agriculture, and food production has accelerated the evolution of antibiotic-resistant bacteria, which, in turn, made the development of novel antibiotics based on new molecular targets a priority in medicinal chemistry. One way of possibly combatting resistant bacterial infections is by inhibiting the copper transporters in prokaryotic cells. Copper is a key element within all living cells, but it can be toxic in excess. Both eukaryotic and prokaryotic cells have developed distinct copper regulation systems to prevent its toxicity. Therefore, selectively targeting the prokaryotic copper regulation system might be an initial step in developing next-generation antibiotics. One such system is the Gram-negative bacterial CusCFBA efflux system. CusB is a key protein in this system and was previously reported to play an important role in opening the channel for efflux via significant structural changes upon copper binding while also controlling the assembly and disassembly process of the entire channel. In this study, we aimed to develop novel peptide copper channel blockers, designed by in silico calculations based on the structure of CusB. Using a combination of magnetic resonance spectroscopy and various biochemical methods, we found a lead peptide that promotes copper-induced cell toxicity. Targeting copper transport in bacteria has not yet been pursued as an antibiotic mechanism of action. Thus, our study lays the foundation for discovering novel antibiotics.
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Affiliation(s)
- Aviv Meir
- Chemistry Department, Faculty of Exact Sciences, Bar Ilan University, Ramat-Gan, Israel
| | | | - Shirin Kahremany
- Gavin Herbert Eye Institute and the Department of Ophthalmology, University of California, Irvine, California, United States of America
| | - Fabian Schwerdtfeger
- Chemistry Department, Faculty of Exact Sciences, Bar Ilan University, Ramat-Gan, Israel
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Centre for Biological Signaling Studies (BIOSS), Freiburg, Germany
| | | | - Anna Munder
- Chemistry Department, Faculty of Exact Sciences, Bar Ilan University, Ramat-Gan, Israel
| | - Olga Viskind
- Chemistry Department, Faculty of Exact Sciences, Bar Ilan University, Ramat-Gan, Israel
| | - Arie Gruzman
- Chemistry Department, Faculty of Exact Sciences, Bar Ilan University, Ramat-Gan, Israel
- * E-mail: (SR); (AG)
| | - Sharon Ruthstein
- Chemistry Department, Faculty of Exact Sciences, Bar Ilan University, Ramat-Gan, Israel
- * E-mail: (SR); (AG)
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144
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SHEN J, WANG Q, GAO D, LYU Y, TANG G. [Synthesis and cell biological properties of polyaspartic acid drug/gene vector]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2019; 48:657-667. [PMID: 31955541 PMCID: PMC8800674 DOI: 10.3785/j.issn.1008-9292.2019.12.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/15/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE Taking polysuccinimide as the main chain, amine side chain and alkyl side chain were grafted to prepare the drug/gene co-delivery vector. The property of the polymers with various side links were investigated to select an optimal vector. METHODS Poly-D, L-polysuccinimide was synthesized by polymerization reaction of D, L-aspartic acid as monomer. Therefore, N, N-dimethylenedipropyl-triamine and 3, 3'-diaminodipropylamine were grafted with dodecylamine/adecylamine/octadecylamine at different proportions by ring-opening reaction to obtain amphiphilic PEECs. The structure of the material was confirmed by 1H NMR; the particle size and surface potential of the micelles were measured by dynamic light scattering; the critical micelle concentration (CMC) was determined by pyrene fluorescent probe; the RNA blocking ability was characterized by agarose gel electrophoresis; the release behavior of the PEECs was examined and the cytotoxicity, cellular uptake and gene silencing efficiency of the PEECs were studied at the cellular level. RESULTS A series of PEECs with different grafting rates was successfully synthesized. The particle sizes and surface potential of the PEEC derived micelles were between 250 nm and 350 nm and 27 mV and 45 mV, respectively, with a small CMC value. The RNA binding ratio of PEECs was at a mass ratio of about 0.8:1. MTT assay demonstrated that PEEC micelles had certain cytotoxicity. PEECs had excellent micelle formation, drug-loading and gene binding abilities, particularly, PEEC16-2 showed high gene silencing efficiency at the cellular level. CONCLUSIONS PEECs are able to co-delivery drug and gene, and PEEC16-2 micelles have the best ability of drug encapsulation and gene delivery.
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Affiliation(s)
| | | | | | | | - Guping TANG
- 汤谷平(1961-), 男, 博士, 教授, 博士生导师, 主要从事生物材料、药物的控制释放和基因治疗研究, E-mail:
;
https://orcid.org/0000-0003-3256-740X
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145
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Manteghi R, Pallagi E, Olajos G, Csóka I. Pegylation and formulation strategy of Anti-Microbial Peptide (AMP) according to the quality by design approach. Eur J Pharm Sci 2019; 144:105197. [PMID: 31862311 DOI: 10.1016/j.ejps.2019.105197] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 12/08/2019] [Accepted: 12/16/2019] [Indexed: 01/10/2023]
Abstract
Antimicrobial resistance is one of the main global threats according to the World Health Organization's (WHO) report (World Health Organization 2014), therefore there is a need for the development of other agents, such as antimicrobial peptides (AMPs). Although AMPs are considered as major candidates for next-generation antibiotics, several challenges including low bioavailability, high manufacturing cost and toxicity are still to be solved for their practical use in therapeutic applications. Novel chemical modification approaches as well as strategies for their delivery offer several opportunities to overcome these barriers and develop more stable and cost-effective synthetic peptides with efficient delivery to the target site. The integration of the Quality by Design (QbD) approach in the early pharmaceutical developments supports researchers in optimizing the targeted product by a risk based manner. Peptide modifications and formulation of peptide delivery systems are challenging tasks and hide several risks. Understanding and evaluating the cause - effect relations within the initial Risk Assessment (RA) step in case of all attributes give the basis for the experimental design as the next step, and aids the formulation development in order to get the final product in the targeted quality range. This study presents a Quality by Design based antimicrobial peptide modification and formulation design. Analyses the potential risks in the AMP PEGylation process through the example of PGLa. The QbD based initial RA screened and evaluated the risk factors in this AMP modification procedure. The critical quality and process related factors were defined and their ranking was performed due to their estimated critical effect on the PEGylated AMP. This pre-formulation design study highlights the critical risk factors as decision points for the further steps.
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Affiliation(s)
- Reihaneh Manteghi
- University of Szeged, Faculty of Pharmacy, Institute of Pharmaceutical Technology and Regulatory Affairs, Szeged, Hungary
| | - Edina Pallagi
- University of Szeged, Faculty of Pharmacy, Institute of Pharmaceutical Technology and Regulatory Affairs, Szeged, Hungary
| | - Gábor Olajos
- University of Szeged, Faculty of Medicine, Department of Medical Chemistry, Szeged, Hungary
| | - Ildikó Csóka
- University of Szeged, Faculty of Pharmacy, Institute of Pharmaceutical Technology and Regulatory Affairs, Szeged, Hungary.
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146
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Mendes B, Almeida JR, Vale N, Gomes P, Gadelha FR, Da Silva SL, Miguel DC. Potential use of 13-mer peptides based on phospholipase and oligoarginine as leishmanicidal agents. Comp Biochem Physiol C Toxicol Pharmacol 2019; 226:108612. [PMID: 31454702 DOI: 10.1016/j.cbpc.2019.108612] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/21/2019] [Accepted: 08/22/2019] [Indexed: 12/29/2022]
Abstract
Phospholipase A2 toxins present in snake venoms interact with biological membranes and serve as structural models for the design of small peptides with anticancer, antibacterial and antiparasitic properties. Oligoarginine peptides are capable of increasing cell membrane permeability (cell penetrating peptides), and for this reason are interesting delivery systems for compounds of pharmacological interest. Inspired by these two families of bioactive molecules, we have synthesized two 13-mer peptides as potential antileishmanial leads gaining insights into structural features useful for the future design of more potent peptides. The peptides included p-Acl, reproducing a natural segment of a Lys49 PLA2 from Agkistrodon contortrix laticinctus snake venom, and its p-AclR7 analogue where all seven lysine residues were replaced by arginines. Both peptides were active against promastigote and amastigote forms of Leishmania (L.) amazonensis and L. (L.) infantum, while displaying low cytotoxicity for primary murine macrophages. Spectrofluorimetric studies suggest that permeabilization of the parasite's cell membrane is the probable mechanism of action of these biomolecules. Relevantly, the engineered peptide p-AclR7 was more active in both life stages of Leishmania and induced higher rates of ethidium bromide incorporation than its native template p-Acl. Taken together, the results suggest that short peptides based on phospholipase toxins are potential scaffolds for development of antileishmanial candidates. Moreover, specific amino acid substitutions, such those herein employed, may enhance the antiparasitic action of these cationic peptides, encouraging their future biomedical applications.
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Affiliation(s)
- Bruno Mendes
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - José R Almeida
- Universidad Regional Amazónica Ikiam, Km 7 Via Muyuna, Tena, Napo, Ecuador
| | - Nuno Vale
- Laboratório de Farmacologia, Departamento de Ciências do Medicamento, Faculdade de Farmácia da Universidade do Porto, Portugal; IPATIMUP/Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Portugal
| | - Paula Gomes
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Portugal
| | - Fernanda R Gadelha
- Departamento de Bioquímica e Biologia Tecidual, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Saulo L Da Silva
- Facultad de Ciencias Químicas, Universidad de Cuenca, Cuenca/Azuay, Ecuador.; Centro de Innovación de la Salud - EUS/EP, Cuenca/Azuay, Ecuador
| | - Danilo C Miguel
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, Brazil.
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147
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Bleher S, Buck J, Muhl C, Sieber S, Barnert S, Witzigmann D, Huwyler J, Barz M, Süss R. Poly(Sarcosine) Surface Modification Imparts Stealth-Like Properties to Liposomes. Small 2019; 15:e1904716. [PMID: 31722126 DOI: 10.1002/smll.201904716] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/23/2019] [Indexed: 06/10/2023]
Abstract
Circulation lifetime is a crucial parameter for a successful therapy with nanoparticles. Reduction and alteration of opsonization profiles by surface modification of nanoparticles is the main strategy to achieve this objective. In clinical settings, PEGylation is the most relevant strategy to enhance blood circulation, yet it has drawbacks, including hypersensitivity reactions in some patients treated with PEGylated nanoparticles, which fuel the search for alternative strategies. In this work, lipopolysarcosine derivatives (BA-pSar, bisalkyl polysarcosine) with precise chain lengths and low polydispersity indices are synthesized, characterized, and incorporated into the bilayer of preformed liposomes via a post insertion technique. Successful incorporation of BA-pSar can be realized in a clinically relevant liposomal formulation. Furthermore, BA-pSar provides excellent surface charge shielding potential for charged liposomes and renders their surface neutral. Pharmacokinetic investigations in a zebrafish model show enhanced circulation properties and reduction in macrophage recognition, matching the behavior of PEGylated liposomes. Moreover, complement activation, which is a key factor in hypersensitivity reactions caused by PEGylated liposomes, can be reduced by modifying the surface of liposomes with an acetylated BA-pSar derivative. Hence, this study presents an alternative surface modification strategy with similar benefits as the established PEGylation of nanoparticles, but with the potential of reducing its drawbacks.
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Affiliation(s)
- Stefan Bleher
- Department of Pharmaceutical Technology and Biopharmacy and Freiburger Materialforschungszentrum (FMF), Institute of Pharmaceutical Sciences, Albert Ludwig University of Freiburg, 79104, Freiburg, Germany
| | - Jonas Buck
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
| | - Christian Muhl
- Institute of Organic Chemistry, Johannes Gutenberg University Mainz, 55128, Mainz, Germany
| | - Sandro Sieber
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
| | - Sabine Barnert
- Department of Pharmaceutical Technology and Biopharmacy and Freiburger Materialforschungszentrum (FMF), Institute of Pharmaceutical Sciences, Albert Ludwig University of Freiburg, 79104, Freiburg, Germany
| | - Dominik Witzigmann
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
- Department of Biochemistry and Molecular Biology, University of British Columbia, Health Sciences Mall, Vancouver, V6T 1Z3, British Columbia, Canada
| | - Jörg Huwyler
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
| | - Matthias Barz
- Institute of Organic Chemistry, Johannes Gutenberg University Mainz, 55128, Mainz, Germany
| | - Regine Süss
- Department of Pharmaceutical Technology and Biopharmacy and Freiburger Materialforschungszentrum (FMF), Institute of Pharmaceutical Sciences, Albert Ludwig University of Freiburg, 79104, Freiburg, Germany
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148
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Anderson CF, Chakroun RW, Su H, Mitrut RE, Cui H. Interface-Enrichment-Induced Instability and Drug-Loading-Enhanced Stability in Inhalable Delivery of Supramolecular Filaments. ACS Nano 2019; 13:12957-12968. [PMID: 31651153 PMCID: PMC7043235 DOI: 10.1021/acsnano.9b05556] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Filamentous microorganisms traveling in aerosol particles display enhanced deposition and retention in the lungs. Inspired by this shape-related biological effect, we report here on the use of supramolecular filaments as potential inhalable drug carriers within aerosols via jet nebulization. We found that the peptide design and supramolecular stability play a crucial role in the interfacial stability and aerosolization properties of the supramolecular filaments. Monomeric units with a positively charged C-terminus produced filaments with reduced aerosol stability, promoting morphological changes after nebulization. Conversely, having a neutral or negatively charged terminus yielded filaments with enhanced stability, where supramolecular integrity is maintained with only reduced length. Our results suggest that molecular enrichment at the air-liquid interface during nebulization is the primary factor to deplete the monomeric peptide amphiphiles in solution, accounting for the observed morphological disruption/transitions. Importantly, encapsulation of drugs and dyes within filaments notably stabilize their supramolecular structure during nebulization, and the loaded filaments exhibit a linear release profile from a nebulizer device. We envision the use of this supramolecular carrier system as an effective platform for the inhalation-based treatment of many lung diseases.
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Affiliation(s)
- Caleb F. Anderson
- Department of Chemical and Biomolecular Engineering and Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Rami W. Chakroun
- Department of Chemical and Biomolecular Engineering and Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Hao Su
- Department of Chemical and Biomolecular Engineering and Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Roxana E. Mitrut
- Department of Chemical and Biomolecular Engineering and Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering and Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
- Department of Oncology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
- Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 North Broadway, Baltimore, Maryland 21231, United States
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149
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Abstract
The catalytic, enantioselective N-oxidation of substituted pyridines is described. The approach is predicated on a biomolecule-inspired catalytic cycle wherein high levels of asymmetric induction are provided by aspartic-acid-containing peptides as the aspartyl side chain shuttles between free acid and peracid forms. Desymmetrizations of bis(pyridine) substrates bearing a remote pro-stereogenic center substituted with a group capable of hydrogen bonding to the catalyst are demonstrated. Our approach presents a new entry into chiral pyridine frameworks in a heterocycle-rich molecular environment. Representative functionalizations of the enantioenriched pyridine N-oxides further document the utility of this approach. Demonstration of the asymmetric N-oxidation in two venerable drug-like scaffolds, Loratadine and Varenicline, show the likely generality of the method for highly variable and distinct chiral environments, while also revealing that the approach is applicable to both pyridines and 1,4-pyrazines.
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Affiliation(s)
- Sheng-Ying Hsieh
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Yu Tang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Simone Crotti
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Elizabeth A. Stone
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
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150
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Dickman R, Danelius E, Mitchell SA, Hansen DF, Erdélyi M, Tabor AB. A Chemical Biology Approach to Understanding Molecular Recognition of Lipid II by Nisin(1-12): Synthesis and NMR Ensemble Analysis of Nisin(1-12) and Analogues. Chemistry 2019; 25:14572-14582. [PMID: 31599485 PMCID: PMC6899958 DOI: 10.1002/chem.201902814] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/29/2019] [Indexed: 12/14/2022]
Abstract
Natural products that target lipid II, such as the lantibiotic nisin, are strategically important in the development of new antibacterial agents to combat the rise of antimicrobial resistance. Understanding the structural factors that govern the highly selective molecular recognition of lipid II by the N-terminal region of nisin, nisin(1-12), is a crucial step in exploiting the potential of such compounds. In order to elucidate the relationships between amino acid sequence and conformation of this bicyclic peptide fragment, we have used solid-phase peptide synthesis to prepare two novel analogues of nisin(1-12) in which the dehydro residues have been replaced. We have carried out an NMR ensemble analysis of one of these analogues and of the wild-type nisin(1-12) peptide in order to compare the conformations of these two bicyclic peptides. Our analysis has shown the effects of residue mutation on ring conformation. We have also demonstrated that the individual rings of nisin(1-12) are pre-organised to an extent for binding to the pyrophosphate group of lipid II, with a high degree of flexibility exhibited in the central amide bond joining the two rings.
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Affiliation(s)
- Rachael Dickman
- Department of ChemistryUniversity College London, 20Gordon StreetLondonWC1H 0AJUK
| | - Emma Danelius
- The Swedish NMR CentreMedicinaregatan 540530GothenburgSweden
| | - Serena A. Mitchell
- Department of ChemistryUniversity College London, 20Gordon StreetLondonWC1H 0AJUK
| | - D. Flemming Hansen
- Institute of Structural and Molecular BiologyDivision of BiosciencesUniversity College LondonGower StreetLondonWC1E 6BTUK
| | - Máté Erdélyi
- The Swedish NMR CentreMedicinaregatan 540530GothenburgSweden
- Department of Chemistry–BMCUppsala UniversityBox 57675123UppsalaSweden
| | - Alethea B. Tabor
- Department of ChemistryUniversity College London, 20Gordon StreetLondonWC1H 0AJUK
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