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Hamdane Y, Chauhan PS, Vutla S, Mulumba M, Ong H, Lubell WD. 5-Substituted N-Aminoimidazolone Peptide Mimic Synthesis by Organocatalyzed Reactions of Azopeptides and Use in the Analysis of Biologically Active Backbone and Side-Chain Topology. Org Lett 2021; 23:3491-3495. [PMID: 33886343 DOI: 10.1021/acs.orglett.1c00936] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Fifteen N-aminoimidazolone (Nai) dipeptides having a variety of 5-position side-chain groups were synthesized by regioselective proline-catalyzed reactions of azopeptide and aldehyde components followed by acid-mediated dehydration of an aza-aspartate semialdehyde intermediate. The introduction of 5-aryl-Nai dipeptides into cluster of differentiation 36 receptor (CD36) peptide ligands has provided insight into the conformation responsible for binding affinity and anti-inflammatory activity.
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Geranurimi A, Cheng CWH, Quiniou C, Côté F, Hou X, Lahaie I, Boudreault A, Chemtob S, Lubell WD. Interleukin-1 Receptor Modulation Using β-Substituted α-Amino-γ-Lactam Peptides From Solid-Phase Synthesis and Diversification. Front Chem 2020; 8:610431. [PMID: 33415098 PMCID: PMC7783595 DOI: 10.3389/fchem.2020.610431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 11/20/2020] [Indexed: 12/30/2022] Open
Abstract
As a key cytokine mediator of inflammation, interleukin-1β (IL-1β) binds to the IL-1 receptor (IL-1R) and activates various downstream signaling mediators, including NF-κB, which is required for immune vigilance and cellular protection. Toward the development of IL-1-targeting therapeutics which exhibit functional selectivity, the all-D-amino acid peptide 1 (101.10, H-D-Arg-D-Tyr-D-Thr-D-Val-D-Glu-D-Leu-D-Ala-NH2) was conceived as an allosteric IL-1R modulator that conserves NF-κB signaling while inhibiting other IL-1-activated pathways. Employing β-hydroxy-α-amino-γ-lactam (Hgl) stereoisomers to study the conformation about the Thr3 residue in 1, [(3R,4S)-Hgl3]-1 (2b), among all possible diastereomers, was found to exhibit identical in vitro and in vivo activity as the parent peptide and superior activity to the α-amino-γ-lactam (Agl) counterpart. Noting the relevance of the β-hydroxyl substituent and configuration for the activity of (3R,4S)-2b, fifteen different β-substituted-Agl3 analogs of 1 (e.g., 2c-q) have now been synthesized by a combination of solution- and solid-phase methods employing N-Fmoc-β-substituted-Agl3-Val-OH dipeptide building blocks. Introduction of a β-azido-Agl3 residue into the resin bound peptide and subsequent reduction and CuAAC chemistry gave access to a series of amine and triazole derivatives (e.g., 2h-q). β-Substituted-[Agl3]-1 analogs 2c-q exhibited generally similar circular dichroism (CD) spectra as that of Hgl analog 2b in water, presenting curve shapes indicative of β-turn structures. The relevance of the β-substituent was indicated in rodent models of preterm labor and retinopathy of prematurity (ROP), in which certain analogs inhibited preterm birth and vaso-obliteration, respectively, with activity similar to 1 and 2b. The β-substituted-[Agl3]-1 analogs exhibited functional selectivity on IL-1-induced signaling pathways. The described solid-phase method has provided discerning probes for exploring peptide structure-activity relationships and valuable leads for developing prototypes to treat inflammatory events leading to prematurity and retinopathy of prematurity, which are leading causes of infant morbidity and blindness respectively.
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Affiliation(s)
- Azade Geranurimi
- Département de Chimie, Université de Montréal, Montréal, QC, Canada
| | - Colin W H Cheng
- Department of Pharmacology & Therapeutics, McGill University, Montréal, QC, Canada.,Hôpital Sainte-Justine Research Centre, Montréal, QC, Canada.,Hôpital Maisonneuve-Rosemont Research Centre, Montréal, QC, Canada
| | | | - France Côté
- Department of Pharmacology & Therapeutics, McGill University, Montréal, QC, Canada
| | - Xin Hou
- Hôpital Sainte-Justine Research Centre, Montréal, QC, Canada
| | - Isabelle Lahaie
- Hôpital Sainte-Justine Research Centre, Montréal, QC, Canada.,Hôpital Maisonneuve-Rosemont Research Centre, Montréal, QC, Canada
| | | | - Sylvain Chemtob
- Department of Pharmacology & Therapeutics, McGill University, Montréal, QC, Canada.,Hôpital Sainte-Justine Research Centre, Montréal, QC, Canada.,Hôpital Maisonneuve-Rosemont Research Centre, Montréal, QC, Canada.,Departments of Pediatrics, Pharmacology and Physiology, and Ophthalmology, Université de Montréal, Montréal, QC, Canada
| | - William D Lubell
- Département de Chimie, Université de Montréal, Montréal, QC, Canada
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Poupart J, Hamdane Y, Lubell WD. Synthesis of enantiomerically enriched 4,5-disubstituted N-aminoimidazol-2-one (Nai) peptide turn mimics. CAN J CHEM 2020. [DOI: 10.1139/cjc-2019-0479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
N-Aminoimidazolone (Nai) peptide mimics were synthesized with minimal epimerization by base-promoted 5-endo-dig cyclization of aza-propargylglycine dipeptide acids and hydrazides followed by olefin migration. 5-Position functionalization using Mannich amino methylation and Vilsmeier–Haack formylation has given access to a set of restrained side chain analogs of Asp, Dab, and Hse residues for mimicry of turn form and function.
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Affiliation(s)
- Julien Poupart
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
| | - Yousra Hamdane
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
| | - William D. Lubell
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Département de Chimie, Université de Montréal, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
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Ganesh Kumar M, Veeresh K, Nalawade SA, Nithun RV, Gopi HN. Direct Transformation of N-Protected α,β-Unsaturated γ-Amino Amides into γ-Lactams through a Base-Mediated Molecular Rearrangement. J Org Chem 2019; 84:15145-15153. [PMID: 31657563 DOI: 10.1021/acs.joc.9b01936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Here, we are reporting a single-step transformation of N-protected α,β-unsaturated γ-amino amides into 5,5-disubstituted γ-lactams through a base-mediated new molecular rearrangement. In contrast to the known N- to C(O) cyclization of saturated γ-amino acids into corresponding γ-lactams, the new rearrangement involves the cyclization between N-terminal Cγ- to C-terminal amide N. The cyclization process was initiated by the migration of double bond from α,β → β,γ position. The enamine-imine tautomerization of the new β,γ-double bond and subsequent 5-exo-trig cyclization of terminal amide leads to the formation of N-protected 5,5-disubstituted γ-lactam. The structures of various γ-lactams obtained from the rearrangement were studied in single crystals. Overall, the results reported here demonstrate the facile and single-step transformation of N-protected α,β-unsaturated γ-amino amides into γ-lactams and provided an excellent opportunity to construct small-molecule peptidomimetics.
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Affiliation(s)
- Mothukuri Ganesh Kumar
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Kuruva Veeresh
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Sachin A Nalawade
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Raj V Nithun
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Hosahudya N Gopi
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
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Atmuri NDP, Lubell WD. Stereo- and Regiochemical Transannular Cyclization of a Common Hexahydro-1H-azonine to Afford Three Different Indolizidinone Dipeptide Mimetics. J Org Chem 2019; 85:1340-1351. [DOI: 10.1021/acs.joc.9b01861] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- N. D. Prasad Atmuri
- Département de Chimie, Université de Montréal, P.O. Box 6128, Station Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - William D. Lubell
- Département de Chimie, Université de Montréal, P.O. Box 6128, Station Centre-ville, Montréal, Québec H3C 3J7, Canada
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Geranurimi A, Cheng CWH, Quiniou C, Zhu T, Hou X, Rivera JC, St-Cyr DJ, Beauregard K, Bernard-Gauthier V, Chemtob S, Lubell WD. Probing Anti-inflammatory Properties Independent of NF-κB Through Conformational Constraint of Peptide-Based Interleukin-1 Receptor Biased Ligands. Front Chem 2019; 7:23. [PMID: 30815434 PMCID: PMC6381024 DOI: 10.3389/fchem.2019.00023] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/10/2019] [Indexed: 12/17/2022] Open
Abstract
Interleukin-1β (IL-1β) binds to the IL-1 receptor (IL-1R) and is a key cytokine mediator of inflammasome activation. IL-1β signaling leads to parturition in preterm birth (PTB) and contributes to the retinal vaso-obliteration characteristic of oxygen-induced retinopathy (OIR) of premature infants. Therapeutics targeting IL-1β and IL-1R are approved to treat rheumatoid arthritis; however, all are large proteins with clinical limitations including immunosuppression, due in part to inhibition of NF-κB signaling, which is required for immuno-vigilance and cytoprotection. The all-D-amino acid peptide 1 (101.10, H-d-Arg-d-Tyr-d-Thr-d-Val-d-Glu-d-Leu-d-Ala-NH2) is an allosteric IL-1R modulator, which exhibits functional selectivity and conserves NF-κB signaling while inhibiting other IL-1-activated pathways. Peptide 1 has proven effective in experimental models of PTB and OIR. Seeking understanding of the structural requirements for the activity and biased signaling of 1, a panel of twelve derivatives was synthesized employing the various stereochemical isomers of α-amino-γ-lactam (Agl) and α-amino-β-hydroxy-γ-lactam (Hgl) residues to constrain the D-Thr-D-Val dipeptide residue. Using circular dichroism spectroscopy, the peptide conformation in solution was observed to be contingent on Agl, Hgl, and Val stereochemistry. Moreover, the lactam mimic structure and configuration influenced biased IL-1 signaling in an in vitro panel of cellular assays as well as in vivo activity in murine models of PTB and OIR. Remarkably, all Agl and Hgl analogs of peptide 1 did not inhibit NF-κB signaling but blocked other pathways, such as JNK and ROCK2 phosphorylation contingent on structure and configuration. Efficacy in preventing preterm labor correlated with a capacity to block IL-1β-induced IL-1β synthesis. Furthermore, the importance of inhibition of JNK and ROCK2 phosphorylation for enhanced activity was highlighted for prevention of vaso-obliteration in the OIR model. Taken together, lactam mimic structure and stereochemistry strongly influenced conformation and biased signaling. Selective modulation of IL-1 signaling was proven to be particularly beneficial for curbing inflammation in models of preterm labor and retinopathy of prematurity (ROP). A class of biased ligands has been created with potential to serve as selective probes for studying IL-1 signaling in disease. Moreover, the small peptide mimic prototypes are promising leads for developing immunomodulatory therapies with easier administration and maintenance of beneficial effects of NF-κB signaling.
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Affiliation(s)
- Azade Geranurimi
- Département de Chimie, Université de Montréal, Montréal, QC, Canada
| | - Colin W H Cheng
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada.,CHU Sainte-Justine Research Centre, Montréal, QC, Canada.,Hôpital Maisonneuve-Rosemont Research Centre, Montréal, QC, Canada
| | | | - Tang Zhu
- CHU Sainte-Justine Research Centre, Montréal, QC, Canada
| | - Xin Hou
- CHU Sainte-Justine Research Centre, Montréal, QC, Canada
| | - José Carlos Rivera
- CHU Sainte-Justine Research Centre, Montréal, QC, Canada.,Hôpital Maisonneuve-Rosemont Research Centre, Montréal, QC, Canada
| | - Daniel J St-Cyr
- Département de Chimie, Université de Montréal, Montréal, QC, Canada
| | - Kim Beauregard
- Département de Chimie, Université de Montréal, Montréal, QC, Canada
| | | | - Sylvain Chemtob
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC, Canada.,CHU Sainte-Justine Research Centre, Montréal, QC, Canada.,Hôpital Maisonneuve-Rosemont Research Centre, Montréal, QC, Canada.,Departments of Pediatrics, Pharmacology and Physiology, and Ophthalmology, Université de Montréal, Montréal, QC, Canada
| | - William D Lubell
- Département de Chimie, Université de Montréal, Montréal, QC, Canada
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Xu L, Wang LC, Xu XQ, Lin J. Characteristics of l-threonine transaldolase for asymmetric synthesis of β-hydroxy-α-amino acids. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01608b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Characteristic a l-threonine transaldolase (LTTA) and reaction conditions optimization for asymmetric synthesis of l-threo-β-hydroxy-α-amino acids.
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Affiliation(s)
- Lian Xu
- College of Chemical Engineering
- Fuzhou University
- Fuzhou 350116
- China
- College of Biological Science and Engineering
| | - Li-Chao Wang
- College of Chemical Engineering
- Fuzhou University
- Fuzhou 350116
- China
- College of Biological Science and Engineering
| | - Xin-Qi Xu
- College of Biological Science and Engineering
- Fuzhou University
- Fuzhou 350116
- China
| | - Juan Lin
- College of Chemical Engineering
- Fuzhou University
- Fuzhou 350116
- China
- College of Biological Science and Engineering
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