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Ausbacher D, Miller LA, Goeres DM, Stewart PS, Strøm MB, Fallarero A. α,α-disubstituted β-amino amides eliminate Staphylococcus aureus biofilms by membrane disruption and biomass removal. Biofilm 2023; 6:100151. [PMID: 37662850 PMCID: PMC10474319 DOI: 10.1016/j.bioflm.2023.100151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/12/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023] Open
Abstract
Bacterial biofilms account for up to 80% of all infections and complicate successful therapies due to their intrinsic tolerance to antibiotics. Biofilms also cause serious problems in the industrial sectors, for instance due to the deterioration of metals or microbial contamination of products. Efforts are put in finding novel strategies in both avoiding and fighting biofilms. Biofilm control is achieved by killing and/or removing biofilm or preventing transition to the biofilm lifestyle. Previous research reported on the anti-biofilm potency of α,α-disubstituted β-amino amides A1, A2 and A3, which are small antimicrobial peptidomimetics with a molecular weight below 500 Da. In the current study it was investigated if these derivatives cause a fast disintegration of biofilm bacteria and removal of Staphylococcus aureus biofilms. One hour incubation of biofilms with all three derivatives resulted in reduced metabolic activity and membrane permeabilization in S. aureus (ATCC 25923) biofilms. Bactericidal properties of these derivatives were attributed to a direct effect on membranes of biofilm bacteria. The green fluorescence protein expressing Staphylococcus aureus strain AH2547 was cultivated in a CDC biofilm reactor and utilized for disinfectant efficacy testing of A3, following the single tube method (American Society for Testing and Materials designation number E2871). A3 at a concentration of 90 μM acted as fast as 100 μM chlorhexidine and was equally effective. Confocal laser scanning microscopy studies showed that chlorhexidine treatment lead to fluorescence fading indicating membrane permeabilization but did not cause biomass removal. In contrast, A3 treatment caused a simultaneous biofilm fluorescence loss and biomass removal. These dual anti-biofilm properties make α,α-disubstituted β-amino amides promising scaffolds in finding new control strategies against recalcitrant biofilms.
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Affiliation(s)
- Dominik Ausbacher
- Natural Products and Medicinal Chemistry Research Group, Department of Pharmacy, UiT The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Lindsey A. Miller
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Darla M. Goeres
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Philip S. Stewart
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Morten B. Strøm
- Natural Products and Medicinal Chemistry Research Group, Department of Pharmacy, UiT The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Adyary Fallarero
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014, Helsinki, Finland
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2
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Biomedical applications of L-alanine produced by Pediococcus acidilactici BD16 (alaD +). Appl Microbiol Biotechnol 2022; 106:1435-1446. [PMID: 35089399 DOI: 10.1007/s00253-022-11766-9] [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: 09/14/2021] [Revised: 12/01/2021] [Accepted: 01/06/2022] [Indexed: 11/02/2022]
Abstract
L-alanine possesses extensive physiological functionality and tremendous pharmacological significance, therefore could be considered as potential ingredient for food, pharmaceutical, and personal care products. However, therapeutic properties of L-alanine still need to be addressed in detail to further strengthen its utilization as a viable ingredient for developing natural therapeutics with minimum side effects. Thus, the present study was aimed to explore the anticipated therapeutic potential of L-alanine, produced microbially using a lactic acid bacterial strain Pediococcus acidilactici BD16 (alaD+) expressing L-alanine dehydrogenase enzyme. The anticipated therapeutic potential of L-alanine was assessed in terms of anti-proliferative, anti-bacterial, and anti-urolithiatic properties. Anti-bacterial assays revealed that L-alanine successfully inhibited growth and in vitro proliferation of important human pathogens including Enterococcus faecalis, Escherichia coli, Klebsiella pneumonia, Staphylococcus aureus, Streptococcus mutans, and Vibrio cholerae in a concentration-dependent manner. Current investigation has also revealed its significant anti-proliferative potential against human lung adenocarcinoma (A549; IC50 7.32 μM) and mammary gland adenocarcinoma (MCF-7; IC50 8.81 μM) cells. The anti-urolithiatic potential of L-alanine was augmented over three different phases, viz., nucleation inhibition, aggregation inhibition, and oxalate depletion. Further, an in vitro cell culture-based kidney stone dissolution model using HEK293-T cells was also established to further strengthen its anti-urolithiatic potential. This is probably the first in vitro cell culture-based model which experimentally validates the immense therapeutic efficacy of L-alanine in treating urolithiasis disease. KEY POINTS: • Assessment of therapeutic potential of L-alanine produced by LAB. • L-alanine exhibited significant anti-proliferative and anti-bacterial activities. • L-alanine as potential anti-urolithiatic agent.
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3
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Zheng H, Zhang F, Monsky W, Ji H, Yang W, Yang X. Interventional Optical Imaging-Monitored Synergistic Effect of Radio-Frequency Hyperthermia and Oncolytic Immunotherapy. Front Oncol 2022; 11:821838. [PMID: 35141157 PMCID: PMC8818682 DOI: 10.3389/fonc.2021.821838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 12/28/2021] [Indexed: 11/22/2022] Open
Abstract
Purpose To develop a new interventional oncology technique using indocyanine green (ICG)-based interventional optical imaging (OI) to monitor the synergistic effect of radiofrequency hyperthermia (RFH)-enhanced oncolytic immunotherapy. Materials and Methods This study included (1) optimization of ICG dose and detection time-window for intracellular uptake by VX2 tumor cells; (2) in-vitro confirmation of capability of using ICG-based OI to assess efficacy of RFH-enhanced oncolytic therapy (LTX-401) for VX2 cells; and (3) in-vivo validation of the interventional OI-monitored, intratumoral RFH-enhanced oncolytic immunotherapy using rabbit models with orthotopic liver VX2 tumors. Both in-vitro and in-vivo experiments were divided into four study groups (n=6/group) with different treatments: (1) combination therapy of RFH+LTX-401; (2) RFH alone at 42°C for 30 min; (3) oncolytic therapy with LTX-401; and (4) control with saline. For in-vivo validation, orthotopic hepatic VX2 tumors were treated using a new multi-functional perfusion-thermal radiofrequency ablation electrode, which enabled simultaneous delivery of both LTX-401 and RFH within the tumor and at the tumor margins. Results In in-vitro experiments, taking up of ICG by VX2 cells was linearly increased from 0 μg/mL to 100 μg/mL, while ICG-signal intensity (SI) reached the peak at 24 hours. MTS assay and apoptosis analysis demonstrated the lowest cell viability and highest apoptosis in combination therapy, compared to three monotherapies (P<0.005). In in-vivo experiments, ultrasound imaging detected the smallest relative tumor volume for the combination therapy, compared to other monotherapies (P<0.005). In both in-vitro and in-vivo experiments, ICG-based interventional optical imaging detected a significantly decreased SI in combination therapy (P<0.005), which was confirmed by the “gold standard” optical/X-ray imaging (P<0.05). Pathologic/laboratory examinations further confirmed the significantly decreased cell proliferation with Ki-67 staining, significantly increased apoptotic index with TUNEL assay, and significantly increased quantities of CD8 and CD80 positive cells with immunostaining in the combination therapy group, compared to other three control groups (P<0.005). Conclusions We present a new interventional oncology technique, interventional optical imaging-monitored RFH-enhanced oncolytic immunotherapy, which may open new avenues to effectively manage those patients with larger, irregular and unresectable malignancies, not only in liver but also the possibility in other organs.
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Affiliation(s)
- Hui Zheng
- Image-Guided Biomolecular Intervention Research and Division of Interventional Radiology, Department of Radiology, University of Washington School of Medicine, Seattle, WA, United States
- Department of Interventional Radiology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Feng Zhang
- Image-Guided Biomolecular Intervention Research and Division of Interventional Radiology, Department of Radiology, University of Washington School of Medicine, Seattle, WA, United States
| | - Wayne Monsky
- Image-Guided Biomolecular Intervention Research and Division of Interventional Radiology, Department of Radiology, University of Washington School of Medicine, Seattle, WA, United States
| | - Hongxiu Ji
- Image-Guided Biomolecular Intervention Research and Division of Interventional Radiology, Department of Radiology, University of Washington School of Medicine, Seattle, WA, United States
- Department of Pathology, Overlake Medical Center and Incyte Diagnostics, Bellevue, WA, United States
| | - Weizhu Yang
- Department of Interventional Radiology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xiaoming Yang
- Image-Guided Biomolecular Intervention Research and Division of Interventional Radiology, Department of Radiology, University of Washington School of Medicine, Seattle, WA, United States
- *Correspondence: Xiaoming Yang,
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4
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Wester A, Björkling F, Franzyk H. Evaluation of 1 H-Triazole-1-[ N, N'-Bis( tert-butoxycarbonyl)]carboxamidine in Solution-Phase and On-Resin Guanidinylation. J Org Chem 2021; 86:14371-14380. [PMID: 34661410 DOI: 10.1021/acs.joc.1c00994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several guanidines and guanidinylated peptides have substantial potential as therapeutics, but efficient guanidinylation reagents are vital for easy access to these compounds. Presently, pyrazole-1-carboxamidine type reagents are commonly used in the transformations of amines into corresponding guanidines. Here, we report a comparative study of the utility of 1H-triazole-1-[N,N'-bis(tert-butoxycarbonyl)]carboxamidine, which was synthesized in two steps and readily upscaled to gram amounts. It exhibited excellent performance in solution-phase reactions, rapidly converting a set of representative aliphatic primary and unhindered secondary amines as well as aniline into the corresponding bis(tert-butoxycarbonyl)-protected guanidines. To enable a direct assessment of the reactivity of guanidinylation reagents, conversions were performed in deuterated solvents (d7-DMF or d8-THF), allowing for continuous analysis of the reaction mixtures by 1H and 13C NMR. Likewise, 1H-triazole-1-[N,N'-bis(tert-butoxycarbonyl)]carboxamidine proved to be a versatile reagent in solid-phase conversions, for example, a resin-bound test peptide (KFFKFFK) was fully guanidinylated in only 2 h by using 2 equivalents of the reagent per free amino group. Also, 1H-triazole-1-[N,N'-bis(tert-butoxycarbonyl)]carboxamidine proved capable of completely guanidinylating more sterically hindered N-terminal residues (e.g., N-methyl amino acids or a peptoid) in resin-bound peptides. Its superior reactivity and stability demonstrated under heating conditions make 1H-triazole-1-[N,N'-bis(tert-butoxycarbonyl)]carboxamidine a valuable guanidinylation reagent both in solution- and solid-phase synthesis.
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Affiliation(s)
- Anita Wester
- Center for Peptide-Based Antibiotics, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 162, DK-2100 Copenhagen East, Denmark
| | - Fredrik Björkling
- Center for Peptide-Based Antibiotics, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 162, DK-2100 Copenhagen East, Denmark
| | - Henrik Franzyk
- Center for Peptide-Based Antibiotics, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 162, DK-2100 Copenhagen East, Denmark
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5
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Tak RK, Noda H, Shibasaki M. Ligand-Enabled, Copper-Catalyzed Electrophilic Amination for the Asymmetric Synthesis of β-Amino Acids. Org Lett 2021; 23:8617-8621. [PMID: 34689558 DOI: 10.1021/acs.orglett.1c03328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic asymmetric nitrene transfer has emerged as a reliable method for the synthesis of nitrogen-containing chiral compounds. Herein, we report the copper-catalyzed intramolecular asymmetric electrophilic amination of aromatic rings. The reactive intermediate is a copper-alkyl nitrene generated from isoxazolidin-5-ones. Copper catalysis promotes three classes of asymmetric transformations, namely, asymmetric desymmetrization, parallel kinetic resolution, and kinetic resolution, expanding the repertoire of alkyl nitrene transfer and providing various cyclic and linear β-amino acids in their enantioenriched forms.
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Affiliation(s)
- Raj K Tak
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Hidetoshi Noda
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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Zandsalimi F, Talaei S, Noormohammad Ahari M, Aghamiri S, Raee P, Roshanzamiri S, Yarian F, Bandehpour M, Zohrab Zadeh Z. Antimicrobial peptides: a promising strategy for lung cancer drug discovery? Expert Opin Drug Discov 2020; 15:1343-1354. [PMID: 32749935 DOI: 10.1080/17460441.2020.1791080] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Antimicrobial peptides (AMPs), also called host defense peptides (HDPs), are identified in almost any form of life, which play an important role in innate immune systems. They have a broad spectrum of antifungal, antiviral, antibacterial, and anticancer activities. Lung cancer remains the leading cause of global cancer-related death. Unfortunately, lung cancer chemotherapy is accompanied by serious side effects, nonspecific toxicity, and multidrug resistance. Hence, to overcome these drawbacks, anticancer peptides (ACPs) derived from AMPs may represent a potential promising synergistic treatment strategy for lung cancer. AREAS COVERED In this review, the authors provide the recent advancements in the use of AMPs for the treatment of lung cancer. Furthermore, the anti-lung cancer modes of action of these peptides have been fully reviewed. Importantly, various strategies for increasing the efficiency and safety of AMPs have been discussed. EXPERT OPINION The combination of AMPs and other cancer treatment approaches such as chemotherapy, nanoparticle-based delivery systems, and photodynamic therapy can be used as a promising revolutionary strategy for the treatment of lung cancer. The most significant limitations of this strategy that need to be focused on are low efficiency and off-target events.
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Affiliation(s)
- Farshid Zandsalimi
- Students' Scientific Research Center, Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences , Tehran, Iran
| | - Sam Talaei
- School of Pharmacy, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Mehdi Noormohammad Ahari
- Department of Clinical Pharmacy, School of Pharmacy, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Shahin Aghamiri
- Student Research Committee, Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences , Tehran, Iran.,Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Pourya Raee
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Soheil Roshanzamiri
- Department of Clinical Pharmacy, School of Pharmacy, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Fatemeh Yarian
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences , Tehran, Iran.,Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Mojgan Bandehpour
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences , Tehran, Iran.,Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences , Tehran, Iran
| | - Zeinab Zohrab Zadeh
- Faculty of Pharmacy, Ahvaz Jundishapur University of Medical Sciences , Ahvaz, Iran
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7
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Antimicrobial activity of amphipathic α,α-disubstituted β-amino amide derivatives against ESBL - CARBA producing multi-resistant bacteria; effect of halogenation, lipophilicity and cationic character. Eur J Med Chem 2019; 183:111671. [PMID: 31536892 DOI: 10.1016/j.ejmech.2019.111671] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/27/2019] [Accepted: 08/30/2019] [Indexed: 02/06/2023]
Abstract
The rapid emergence and spread of multi-resistant bacteria have created an urgent need for new antimicrobial agents. We report here a series of amphipathic α,α-disubstituted β-amino amide derivatives with activity against 30 multi-resistant clinical isolates of Gram-positive and Gram-negative bacteria, including isolates with extended spectrum β-lactamase - carbapenemase (ESBL-CARBA) production. A variety of halogenated aromatic side-chains were investigated to improve antimicrobial potency and minimize formation of Phase I metabolites. Net positive charge and cationic character of the derivatives had an important effect on toxicity against human cell lines. The most potent and selective derivative was the diguanidine derivative 4e with 3,5-di-brominated benzylic side-chains. Derivative 4e displayed minimum inhibitory concentrations (MIC) of 0.25-8 μg/mL against Gram-positive and Gram-negative reference strains, and 2-32 μg/mL against multi-resistant clinical isolates. Derivative 4e showed also low toxicity against human red blood cells (EC50 > 200 μg/mL), human hepatocyte carcinoma cells (HepG2: EC50 > 64 μg/mL), and human lung fibroblast cells (MRC-5: EC50 > 64 μg/mL). The broad-spectrum antimicrobial activity and low toxicity of diguanylated derivatives such as 4e make them attractive as lead compounds for development of novel antimicrobial drugs.
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8
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Small AntiMicrobial Peptide With in Vivo Activity Against Sepsis. Molecules 2019; 24:molecules24091702. [PMID: 31052373 PMCID: PMC6539432 DOI: 10.3390/molecules24091702] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 11/18/2022] Open
Abstract
Antimicrobial peptides (AMPs) are considered as potential therapeutic sources of future antibiotics because of their broad-spectrum activities and alternative mechanisms of action compared to conventional antibiotics. Although AMPs present considerable advantages over conventional antibiotics, their clinical and commercial development still have some limitations, because of their potential toxicity, susceptibility to proteases, and high cost of production. To overcome these drawbacks, the use of peptides mimics is anticipated to avoid the proteolysis, while the identification of minimalist peptide sequences retaining antimicrobial activities could bring a solution for the cost issue. We describe here new polycationic β-amino acids combining these two properties, that we used to design small dipeptides that appeared to be active against Gram-positive and Gram-negative bacteria, selective against prokaryotic versus mammalian cells, and highly stable in human plasma. Moreover, the in vivo data activity obtained in septic mice reveals that the bacterial killing effect allows the control of the infection and increases the survival rate of cecal ligature and puncture (CLP)-treated mice.
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Anticancer and DNA binding studies of potential amino acids based quinazolinone analogs: Synthesis, SAR and molecular docking. Bioorg Chem 2019; 87:252-264. [PMID: 30908968 DOI: 10.1016/j.bioorg.2019.03.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/11/2019] [Accepted: 03/14/2019] [Indexed: 12/30/2022]
Abstract
A novel series of amino acids conjugated quinazolinone-Schiff's bases were synthesized and screened for their in vitro anticancer activity and validated by molecular docking and DNA binding studies. In the present investigations, compounds 32, 33, 34, 41, 42 and 43 showed most potent anticancer activity against tested cancer cell lines and DNA binding study using methyl green comparing to doxorubicin and ethidium bromide as a positive control respectively. The structure-activity relationship (SAR) revealed that the tryptophan and phenylalanine derived electron donating groups (OH and OCH3) favored DNA binding studies and anticancer activity whereas; electron withdrawing groups (Cl, NO2, and F) showed least anticancer activity. The molecular docking study, binding interactions of the most active compounds 33, 34, 42 and 43 stacked with A-T rich regions of the DNA minor groove by surface binding interactions were confirmed.
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10
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Alishetty S, Shih HP, Han CC. One-Step, Effective, and Cascade Syntheses of Highly Functionalized Cyclopentenes with High Diastereoselectivity. Org Lett 2018; 20:2513-2516. [DOI: 10.1021/acs.orglett.8b00510] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Suman Alishetty
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
| | - Hong-Pin Shih
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
| | - Chien-Chung Han
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
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11
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Nascimento de Oliveira M, Arseniyadis S, Cossy J. Palladium-Catalyzed Asymmetric Allylic Alkylation of 4-Substituted Isoxazolidin-5-ones: Straightforward Access to β2,2
-Amino Acids. Chemistry 2018; 24:4810-4814. [DOI: 10.1002/chem.201800641] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Marllon Nascimento de Oliveira
- Laboratoire de Chimie Organique; Institute of Chemistry, Biology and Innovation (CBI)-ESPCI; Paris/CNRS (UMR8231)/PSL* Research University; 10 rue Vauquelin 75231 Paris Cedex 05 France
| | - Stellios Arseniyadis
- Laboratoire de Chimie Organique; Institute of Chemistry, Biology and Innovation (CBI)-ESPCI; Paris/CNRS (UMR8231)/PSL* Research University; 10 rue Vauquelin 75231 Paris Cedex 05 France
- Queen Mary, University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
| | - Janine Cossy
- Laboratoire de Chimie Organique; Institute of Chemistry, Biology and Innovation (CBI)-ESPCI; Paris/CNRS (UMR8231)/PSL* Research University; 10 rue Vauquelin 75231 Paris Cedex 05 France
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12
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Kumar V, Singh S, Singh R, Upadhyay N, Singh J. Design, synthesis, and characterization of 2,2-bis(2,4-dinitrophenyl)-2-(phosphonatomethylamino)acetate as a herbicidal and biological active agent. J Chem Biol 2017; 10:179-190. [PMID: 29075355 DOI: 10.1007/s12154-017-0174-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 06/19/2017] [Indexed: 10/19/2022] Open
Abstract
The present study was designed to synthesize the bioactive molecule 2,2-bis(2,4-dinitrophenyl)-2-(phosphonatomethylamino)acetate (1), having excellent applications in the field of plant protection as a herbicide. Structure of newly synthesized molecule 1 was confirmed by using the elemental analysis, mass spectrometric, NMR, UV-visible, and FTIR spectroscopic techniques. To obtain better structural insights of molecule 1, 3D molecular modeling was performed using the GAMESS programme. Microbial activities of 1 were checked against the pathogenic strains Aspergillus fumigatus (NCIM 902) and Salmonella typhimurium (NCIM 2501). Molecule 1 has shown excellent activities against fungal strain A. fumigates (35 μg/l) and bacterial strain S. typhimurium (25 μg/l). To check the medicinal significance of molecule 1, interactions with bovine serum albumin (BSA) protein were checked. The calculated value of binding constant of molecule 1-BSA complex was 1.4 × 106 M-1, which were similar to most effective drugs like salicylic acid. More significantly, as compared to herbicide glyphosate, molecule 1 has exhibited excellent herbicidal activities, in pre- and post-experiments on three weeds; barnyard grass (Echinochloa Crus), red spranglitop (Leptochloa filiformis), and yellow nuts (Cyperus Esculenfus). Further, effects of molecule 1 on plant growth-promoting rhizobacterial (PGPR) strains were checked. More interestingly, as compared to glyphosate, molecule 1 has shown least adverse effects on soil PGPR strains including the Rhizobium leguminosarum (NCIM 2749), Pseudomonas fluorescens (NCIM 5096), and Pseudomonas putida (NCIM 2847).
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Affiliation(s)
- Vijay Kumar
- Regional Ayurveda Research Institute for Drug Development, Gwalior, 474009 India.,Government of India, Ministry of Agriculture, Regional Pesticides Testing Laboratory, Chandigarh, 160030 India
| | - Simranjeet Singh
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab Pin-144002 India
| | - Rohit Singh
- Regional Ayurveda Research Institute for Drug Development, Gwalior, 474009 India
| | - Niraj Upadhyay
- Department of Chemistry, Dr. Hari Singh Gour University, Sagar, Madhya Pradesh Pin-462007 India
| | - Joginder Singh
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab Pin-144002 India
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Hanski L, Vuorela P. Lead Discovery Strategies for Identification of Chlamydia pneumoniae Inhibitors. Microorganisms 2016; 4:E43. [PMID: 27916800 PMCID: PMC5192526 DOI: 10.3390/microorganisms4040043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/28/2016] [Accepted: 11/04/2016] [Indexed: 12/18/2022] Open
Abstract
Throughout its known history, the gram-negative bacterium Chlamydia pneumoniae has remained a challenging target for antibacterial chemotherapy and drug discovery. Owing to its well-known propensity for persistence and recent reports on antimicrobial resistence within closely related species, new approaches for targeting this ubiquitous human pathogen are urgently needed. In this review, we describe the strategies that have been successfully applied for the identification of nonconventional antichlamydial agents, including target-based and ligand-based virtual screening, ethnopharmacological approach and pharmacophore-based design of antimicrobial peptide-mimicking compounds. Among the antichlamydial agents identified via these strategies, most translational work has been carried out with plant phenolics. Thus, currently available data on their properties as antichlamydial agents are described, highlighting their potential mechanisms of action. In this context, the role of mitogen-activated protein kinase activation in the intracellular growth and survival of C. pneumoniae is discussed. Owing to the complex and often complementary pathways applied by C. pneumoniae in the different stages of its life cycle, multitargeted therapy approaches are expected to provide better tools for antichlamydial therapy than agents with a single molecular target.
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Affiliation(s)
- Leena Hanski
- Pharmaceutical Biology, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.
| | - Pia Vuorela
- Pharmaceutical Biology, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.
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14
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Hanski L, Ausbacher D, Tiirola TM, Strøm MB, Vuorela PM. Amphipathic β2,2-Amino Acid Derivatives Suppress Infectivity and Disrupt the Intracellular Replication Cycle of Chlamydia pneumoniae. PLoS One 2016; 11:e0157306. [PMID: 27280777 PMCID: PMC4900588 DOI: 10.1371/journal.pone.0157306] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 05/29/2016] [Indexed: 12/27/2022] Open
Abstract
We demonstrate in the current work that small cationic antimicrobial β2,2-amino acid derivatives (Mw < 500 Da) are highly potent against Chlamydia pneumoniae at clinical relevant concentrations (< 5 μM, i.e. < 3.4 μg/mL). C. pneumoniae is an atypical respiratory pathogen associated with frequent treatment failures and persistent infections. This gram-negative bacterium has a biphasic life cycle as infectious elementary bodies and proliferating reticulate bodies, and efficient treatment is challenging because of its long and obligate intracellular replication cycle within specialized inclusion vacuoles. Chlamydicidal effect of the β2,2-amino acid derivatives in infected human epithelial cells was confirmed by transmission electron microscopy. Images of infected host cells treated with our lead derivative A2 revealed affected chlamydial inclusion vacuoles 24 hours post infection. Only remnants of elementary and reticulate bodies were detected at later time points. Neither the EM studies nor resazurin-based cell viability assays showed toxic effects on uninfected host cells or cell organelles after A2 treatment. Besides the effects on early intracellular inclusion vacuoles, the ability of these β2,2-amino acid derivatives to suppress Chlamydia pneumoniae infectivity upon treatment of elementary bodies suggested also a direct interaction with bacterial membranes. Synthetic β2,2-amino acid derivatives that target C. pneumoniae represent promising lead molecules for development of antimicrobial agents against this hard-to-treat intracellular pathogen.
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Affiliation(s)
- Leena Hanski
- Pharmaceutical Design and Discovery Research Group, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki (UHEL), Helsinki, Finland
| | - Dominik Ausbacher
- Natural Products and Medicinal Chemistry Research Group, Department of Pharmacy, Faculty of Health Sciences, UiT – The Arctic University of Norway, Tromsø, Norway
| | - Terttu M. Tiirola
- Pharmaceutical Design and Discovery Research Group, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki (UHEL), Helsinki, Finland
| | - Morten B. Strøm
- Natural Products and Medicinal Chemistry Research Group, Department of Pharmacy, Faculty of Health Sciences, UiT – The Arctic University of Norway, Tromsø, Norway
| | - Pia M. Vuorela
- Pharmaceutical Design and Discovery Research Group, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki (UHEL), Helsinki, Finland
- * E-mail:
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15
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The Cytolytic Amphipathic β(2,2)-Amino Acid LTX-401 Induces DAMP Release in Melanoma Cells and Causes Complete Regression of B16 Melanoma. PLoS One 2016; 11:e0148980. [PMID: 26881822 PMCID: PMC4755540 DOI: 10.1371/journal.pone.0148980] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 01/26/2016] [Indexed: 01/23/2023] Open
Abstract
In the present study we examined the ability of the amino acid derivative LTX-401 to induce cell death in cancer cell lines, as well as the capacity to induce regression in a murine melanoma model. Mode of action studies in vitro revealed lytic cell death and release of danger-associated molecular pattern molecules, preceded by massive cytoplasmic vacuolization and compromised lysosomes in treated cells. The use of a murine melanoma model demonstrated that the majority of animals treated with intratumoural injections of LTX-401 showed complete and long-lasting remission. Taken together, these results demonstrate the potential of LTX-401 as an immunotherapeutic agent for the treatment of solid tumors.
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16
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Reddy MD, Watkins EB. Palladium-Catalyzed Direct Arylation of C(sp3)–H Bonds of α-Cyano Aliphatic Amides. J Org Chem 2015; 80:11447-59. [DOI: 10.1021/acs.joc.5b02138] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Damoder Reddy
- Department of Pharmaceutical
Sciences, School of Pharmacy, Union University, Jackson, Tennessee 38305, United States
| | - E. Blake Watkins
- Department of Pharmaceutical
Sciences, School of Pharmacy, Union University, Jackson, Tennessee 38305, United States
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17
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Stereo-selective synthesis, structural and antibacterial studies of novel glycosylated β2,3-amino acid analogues. Med Chem Res 2015. [DOI: 10.1007/s00044-015-1370-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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García-González I, Mata L, Corzana F, Jiménez-Osés G, Avenoza A, Busto JH, Peregrina JM. Synthesis and Conformational Analysis of Hybrid α/β-Dipeptides IncorporatingS-Glycosyl-β2,2-Amino Acids. Chemistry 2014; 21:1156-68. [DOI: 10.1002/chem.201405318] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Indexed: 12/27/2022]
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19
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Sivertsen A, Tørfoss V, Isaksson J, Ausbacher D, Anderssen T, Brandsdal BO, Havelkova M, Skjørholm AE, Strøm MB. Anticancer potency of small linear and cyclic tetrapeptides and pharmacokinetic investigations of peptide binding to human serum albumin. J Pept Sci 2014; 20:279-91. [PMID: 24677781 DOI: 10.1002/psc.2615] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 11/21/2013] [Accepted: 12/26/2013] [Indexed: 12/25/2022]
Abstract
We have in the present study explored the anticancer activity against human Burkitt's lymphoma cells (Ramos) of a series of small linear and cyclic tetrapeptides containing a β2,2-amino acid with either two 2-naphthyl-methylene or two para-CF3-benzyl side chains, along with their interaction with the main plasma protein human serum albumin (HSA). The cyclic and more amphipathic tetrapeptides revealed a notably higher anticancer potency against Ramos cells [50% inhibitory concentration (IC50) 11–70 μM] compared to the linear tetrapeptide counterparts (IC50 18.7 to >413 μM). The most potent cyclic tetrapeptide c3 had a 16.5-fold preference for Ramos cells compared to human red blood cells, whereas the cyclic tetrapeptide c1 both showed low hemolytic activity and displayed the overall highest (2.9-fold) preference for Ramos cells (IC50 23 μM) compared to healthy human lung fibroblast cells (MRC-5). Investigating the interaction of selected tetrapeptides and recently reported hexapeptides with HSA revealed that the peptides bind to drug site II of HSA in the 22–28 μM range, disregarding size and overall structure. NMR and in silico molecular docking experiments identified the lipophilic residues as responsible for the interaction, but in vitro studies showed that the anticancer potency of the peptides varied in the presence of HSA and that c3 remained the most potent peptide. Based on our findings, we call for implementing serum albumin binding in development of anticancer peptides, as it may have implications for future administration and systemic distribution of peptide-based cancer drugs.
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20
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Ausbacher D, Fallarero A, Kujala J, Määttänen A, Peltonen J, Strøm MB, Vuorela PM. Staphylococcus aureus biofilm susceptibility to small and potent β(2,2)-amino acid derivatives. BIOFOULING 2014; 30:81-93. [PMID: 24256295 DOI: 10.1080/08927014.2013.847924] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Small antimicrobial β(2,2)-amino acid derivatives (Mw < 500 Da) are reported to display high antibacterial activity against suspended Gram-positive strains combined with low hemolytic activity. In the present study, the anti-biofilm activity of six β(2,2)-amino acid derivatives (A1-A6) against Staphylococcus aureus (ATCC 25923) was investigated. The derivatives displayed IC50 values between 5.4 and 42.8 μM for inhibition of biofilm formation, and concentrations between 22.4 and 38.4 μM had substantial effects on preformed biofilms. The lead derivative A2 showed high killing capacity (log R), and it caused distinct ultrastructural changes in the biofilms as shown by electron and atomic force microscopy. The anti-biofilm properties of A2 was preserved under high salinity conditions. Extended screening showed also high activity of A2 against Escherichia coli (XL1 Blue) biofilms. These advantageous features together with high activity against preformed biofilms make β(2,2)-amino acid derivatives a promising class of compounds for further development of anti-biofilm agents.
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Affiliation(s)
- Dominik Ausbacher
- a Faculty of Health Sciences, Department of Pharmacy , University of Tromsø , Tromsø , Norway
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