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Thomson AL, Robinson AJ, Belgi A. Synthesis of Cystine-Stabilised Dicarba Conotoxin EpI: Ring-Closing Metathesis of Sidechain Deprotected, Sulfide-Rich Sequences. Mar Drugs 2023; 21:390. [PMID: 37504921 PMCID: PMC10381330 DOI: 10.3390/md21070390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023] Open
Abstract
Recombinant peptide synthesis allows for large-scale production of peptides with therapeutic potential. However, access to dicarba peptidomimetics via sidechain-deprotected sequences becomes challenging with exposed Lewis basicity presented by amine and sulfur-containing residues. Presented here is a combination of strategies which can be used to deactivate coordinative residues and achieve high-yielding Ru-catalyzed ring-closing metathesis. The chemistry is exemplified using α-conotoxin EpI, a native bicyclic disulfide-containing sequence isolated from the marine conesnail Conus episcopatus. Replacement of the loop I disulfide with E/Z-dicarba bridges was achieved with high conversion via solution-phase ring-closing metathesis of the unprotected linear peptide after simple chemoselective oxidation and ion-exchange masking of problematic functionality. Metathesis was also attempted in green solvent choices to further improve the sustainability of dicarba peptide synthesis.
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Affiliation(s)
- Amy L Thomson
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Andrea J Robinson
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Alessia Belgi
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
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2
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Harpur CM, West AC, Le Page MA, Lam M, Hodges C, Oseghale O, Gearing AJ, Tate MD. Naturally derived cytokine peptides limit virus replication and severe disease during influenza A virus infection. Clin Transl Immunology 2023; 12:e1443. [PMID: 36969366 PMCID: PMC10034483 DOI: 10.1002/cti2.1443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/02/2023] [Accepted: 03/07/2023] [Indexed: 03/25/2023] Open
Abstract
Objectives Novel host‐targeted therapeutics could treat severe influenza A virus (IAV) infections, with reduced risk of drug resistance. LAT8881 is a synthetic form of the naturally occurring C‐terminal fragment of human growth hormone. Acting independently of the growth hormone receptor, it can reduce inflammation‐induced damage and promote tissue repair in an animal model of osteoarthritis. LAT8881 has been assessed in clinical trials for the treatment of obesity and neuropathy and has an excellent safety profile. We investigated the potential for LAT8881, its metabolite LAT9991F and LAT7771 derived from prolactin, a growth hormone structural homologue, to treat severe IAV infection. Methods LAT8881, LAT9991F and LAT7771 were evaluated for their effects on cell viability and IAV replication in vitro, as well as their potential to limit disease in a preclinical mouse model of severe IAV infection. Results In vitro LAT8881 treatment enhanced cell viability, particularly in the presence of cytotoxic stress, which was countered by siRNA inhibition of host lanthionine synthetase C‐like proteins. Daily intranasal treatment of mice with LAT8881 or LAT9991F, but not LAT7771, from day 1 postinfection significantly improved influenza disease resistance, which was associated with reduced infectious viral loads, reduced pro‐inflammatory cytokines and increased abundance of protective alveolar macrophages. LAT8881 treatment in combination with the antiviral oseltamivir phosphate led to more pronounced reduction in markers of disease severity than treatment with either compound alone. Conclusion These studies provide the first evidence identifying LAT8881 and LAT9991F as novel host‐protective therapies that improve survival, limit viral replication, reduce local inflammation and curtail tissue damage during severe IAV infection. Evaluation of LAT8881 and LAT9991F in other infectious and inflammatory conditions of the airways is warranted.
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Affiliation(s)
- Christopher M Harpur
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
| | - Alison C West
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
| | - Mélanie A Le Page
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
| | - Maggie Lam
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
| | - Christopher Hodges
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
| | - Osezua Oseghale
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
| | | | - Michelle D Tate
- Centre for Innate Immunity and Infectious DiseasesHudson Institute of Medical ResearchClaytonVICAustralia
- Department of Molecular and Translational SciencesMonash UniversityClaytonVICAustralia
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Belgi A, Burnley JV, MacRaild CA, Chhabra S, Elnahriry KA, Robinson SD, Gooding SG, Tae HS, Bartels P, Sadeghi M, Zhao FY, Wei H, Spanswick D, Adams DJ, Norton RS, Robinson AJ. Alkyne-Bridged α-Conotoxin Vc1.1 Potently Reverses Mechanical Allodynia in Neuropathic Pain Models. J Med Chem 2021; 64:3222-3233. [PMID: 33724033 DOI: 10.1021/acs.jmedchem.0c02151] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Several Conus-derived venom peptides are promising lead compounds for the management of neuropathic pain, with α-conotoxins being of particular interest. Modification of the interlocked disulfide framework of α-conotoxin Vc1.1 has been achieved using on-resin alkyne metathesis. Although introduction of a metabolically stable alkyne motif significantly disrupts backbone topography, the structural modification generates a potent and selective GABAB receptor agonist that inhibits Cav2.2 channels and exhibits dose-dependent reversal of mechanical allodynia in a behavioral rat model of neuropathic pain. The findings herein support the hypothesis that analgesia can be achieved via activation of GABABRs expressed in dorsal root ganglion (DRG) sensory neurons.
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Affiliation(s)
- Alessia Belgi
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - James V Burnley
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Christopher A MacRaild
- Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Sandeep Chhabra
- Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Khaled A Elnahriry
- Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Samuel D Robinson
- Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Simon G Gooding
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Han-Shen Tae
- Illawarra Health & Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Peter Bartels
- Illawarra Health & Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Mahsa Sadeghi
- Illawarra Health & Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales 2522, Australia
| | | | | | - David Spanswick
- NeuroSolutions Ltd., Coventry CV4 7AL, U.K
- Biomedicine Discovery Institute and the Department of Physiology, Monash University, Clayton, Victoria 3800, Australia
- Warwick Medical School, University of Warwick, Coventry CV4 7AL, U.K
| | - David J Adams
- Illawarra Health & Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Raymond S Norton
- Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
- ARC Centre for Fragment-Based Design, Monash University, Parkville, Victoria 3052, Australia
| | - Andrea J Robinson
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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4
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Gisemba SA, Aldrich JV. Optimized Ring Closing Metathesis Reaction Conditions To Suppress Desallyl Side Products in the Solid-Phase Synthesis of Cyclic Peptides Involving Tyrosine( O-allyl). J Org Chem 2020; 85:1407-1415. [PMID: 31880448 PMCID: PMC8018726 DOI: 10.1021/acs.joc.9b02345] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We are exploring constraining aromatic residues in the kappa opioid receptor selective antagonist arodyn (Ac[Phe1,2,3,Arg4,d-Ala8]dynorphin A(1-11)-NH2) by ring closing metathesis (RCM) involving tyrosine(O-allyl) (Tyr(All)), but desallyl products limited the yields of the desired cyclic peptide. The model dipeptide Fmoc-Tyr(All)-Tyr(All) was used to explore different reaction conditions, including the use of isomerization suppressants, to minimize formation of the desallyl products and enhance formation of the desired RCM product. Reaction conditions were identified that enhanced the RCM product yield while suppressing desallyl products using both second-generation Grubbs and second-generation Hoveyda-Grubbs catalysts. These optimized reaction conditions were then applied to the cyclization of a tripeptide and an arodyn analog resulting in ≥70% conversion to the desired cyclic peptides. These strategies should be applicable to RCM involving Tyr(All) and similar residues in peptide and peptidomimetic cyclizations performed on solid phase.
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Affiliation(s)
- Solomon A. Gisemba
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610
| | - Jane V. Aldrich
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610
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Ballantine RD, Li YX, Qian PY, Cochrane SA. Rational design of new cyclic analogues of the antimicrobial lipopeptide tridecaptin A 1. Chem Commun (Camb) 2018; 54:10634-10637. [PMID: 30179243 PMCID: PMC6146376 DOI: 10.1039/c8cc05790g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cyclization of tridecaptin A1 imparts stability to the d-peptidase TriF.
Non-ribosomal peptides (NRPs) are a rich source of antibiotic candidates. However, it was recently discovered that resistance to NRPs can be mediated by d-stereoselective peptidases. The tridecaptins, a class of NRPs that selectively target Gram-negative bacteria, are degraded by the d-peptidase TriF. Through analysis of a solution NMR structure of tridecaptin A1, we have rationally synthesized new cyclic tridecaptin analogues that retain strong antimicrobial activity and are resistant to TriF.
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Affiliation(s)
- Ross D Ballantine
- School of Chemistry and Chemical Engineering, David Keir Building, Stranmillis Road, Queen's University Belfast, Belfast BT9 5AG, UK.
| | - Yong-Xin Li
- Department of Ocean Science and Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Pei-Yuan Qian
- Department of Ocean Science and Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Stephen A Cochrane
- School of Chemistry and Chemical Engineering, David Keir Building, Stranmillis Road, Queen's University Belfast, Belfast BT9 5AG, UK.
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Gori A, Gagni P, Rinaldi S. Disulfide Bond Mimetics: Strategies and Challenges. Chemistry 2017; 23:14987-14995. [PMID: 28749012 DOI: 10.1002/chem.201703199] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 12/25/2022]
Abstract
The activity profile of many biologically relevant proteins and peptides often relies on a precise 3D structural organization. In this context, disulfide bonds are natural covalent constraints that play a key role in driving and stabilizing the folding pattern of these molecules. Despite its prominent significance as structural motif, the disulfide bond itself is inherently unstable under physiological conditions, posing a major limit to the use and development of disulfide-rich peptides and proteins as molecular tools and drug lead compounds. To tackle this restriction, disulfide engineering with stable functional analogues has arisen a considerable interest. Here, the most popular approaches to disulfide replacement are reviewed and discussed with particular emphasis on advantages and limitations under both functional and synthetic perspectives.
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Affiliation(s)
- Alessandro Gori
- Istituto di Chimica del Riconoscimento Molecolare (ICRM), National Research Council of, Italy) (CNR, via Mario Bianco 9, 20131, Milano, Italy
| | - Paola Gagni
- Istituto di Chimica del Riconoscimento Molecolare (ICRM), National Research Council of, Italy) (CNR, via Mario Bianco 9, 20131, Milano, Italy
| | - Silvia Rinaldi
- Istituto di Chimica del Riconoscimento Molecolare (ICRM), National Research Council of, Italy) (CNR, via Mario Bianco 9, 20131, Milano, Italy
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Martín-Gago P, Ramón R, Aragón E, Fernández-Carneado J, Martin-Malpartida P, Verdaguer X, López-Ruiz P, Colás B, Cortes MA, Ponsati B, Macias MJ, Riera A. A tetradecapeptide somatostatin dicarba-analog: Synthesis, structural impact and biological activity. Bioorg Med Chem Lett 2014; 24:103-7. [DOI: 10.1016/j.bmcl.2013.11.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 11/21/2013] [Accepted: 11/25/2013] [Indexed: 01/19/2023]
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How to blast osteoblasts? Novel dicarba analogues of amylin-(1–8) to treat osteoporosis. Bioorg Med Chem 2012; 20:6011-8. [DOI: 10.1016/j.bmc.2012.08.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 08/16/2012] [Accepted: 08/28/2012] [Indexed: 11/22/2022]
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10
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2010. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Heapy AM, Williams GM, Fraser JD, Brimble MA. Synthesis of a dicarba analogue of human β-defensin-1 using a combined ring closing metathesis--native chemical ligation strategy. Org Lett 2012; 14:878-81. [PMID: 22239540 DOI: 10.1021/ol203407z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We herein describe the first synthesis of the native antimicrobial protein HBD-1 making use of an orthogonal thiol protection strategy and a novel dicarba analogue thereof. The robust hydrocarbon linkage was installed by replacement of one disulfide bond using on-resin ring closing metathesis. The unprecedented 59-membered C-terminal cysteine macrocyclic fragment thus formed then engages in native chemical ligation allowing convergent access to this unique synthetic protein analogue.
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Affiliation(s)
- Amanda M Heapy
- School of Chemical Sciences, The University of Auckland, Auckland, New Zealand
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Pedersen SL, Tofteng AP, Malik L, Jensen KJ. Microwave heating in solid-phase peptide synthesis. Chem Soc Rev 2012; 41:1826-44. [DOI: 10.1039/c1cs15214a] [Citation(s) in RCA: 214] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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13
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Liskamp RMJ, Rijkers DTS, Kruijtzer JAW, Kemmink J. Peptides and proteins as a continuing exciting source of inspiration for peptidomimetics. Chembiochem 2011; 12:1626-53. [PMID: 21751324 DOI: 10.1002/cbic.201000717] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Indexed: 12/17/2022]
Abstract
Despite their enormous diversity in biological function and structure, peptides and proteins are endowed with properties that have induced and stimulated the development of peptidomimetics. Clearly, peptides can be considered as the "stem" of a phylogenetic molecular development tree from which branches of oligomeric peptidomimetics such as peptoids, peptidosulfonamides, urea peptidomimetics, as well as β-peptides have sprouted. It is still a challenge to efficiently synthesize these oligomeric species, and study their structural and biological properties. Combining peptides and peptidomimetics led to the emergence of peptide-peptidomimetic hybrids in which one or more (proteinogenic) amino acid residues have been replaced with these mimetic residues. In scan-like approaches, the influence of these replacements on biological activity can then be studied, to evaluate to what extent a peptide can be transformed into a peptidomimetic structure while maintaining, or even improving, its biological properties. A central issue, especially with the smaller peptides, is the lack of secondary structure. Important approaches to control secondary structure include the introduction of α,α-disubstituted amino acids, or (di)peptidomimetic structures such as the Freidinger lactam. Apart from intra-amino acid constraints, inter-amino acid constraints for formation of a diversity of cyclic peptides have shaped a thick branch. Apart from the classical disulfide bridges, the repertoire has been extended to include sulfide and triazole bridges as well as the single-, double- and even triple-bond replacements, accessible by the extremely versatile ring-closing alkene/alkyne metathesis approaches. The latter approach is now the method of choice for the secondary structure that presents the greatest challenge for structural stabilization: the α-helix.
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Affiliation(s)
- Rob M J Liskamp
- Medicinal Chemistry and Chemical Biology, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
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Synthesis, conformational analysis and biological properties of a dicarba derivative of the antimicrobial peptide, brevinin-1BYa. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2011; 40:555-64. [DOI: 10.1007/s00249-011-0679-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 01/11/2011] [Accepted: 01/25/2011] [Indexed: 10/18/2022]
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van Lierop BJ, Bornschein C, Jackson WR, Robinson AJ. Ring-closing Metathesis in Peptides - the Sting is in the Tail! Aust J Chem 2011. [DOI: 10.1071/ch11090] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Performing ring-closing metathesis on resin-bound peptides provides an expedient route to carbocyclic peptidomimetics of medicinal interest. Some sequences are highly resistant to metathesis and special strategies need to be employed to promote viable ring closure. This paper describes an on-resin, alternating solid-phase peptide synthesis-catalysis method to overcome deleterious aggregation phenomena. It can be used to promote high yielding single-ring closures and regioselective multi-ring construction in peptides.
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