1
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Kaya K, Khalil M, Chi EY, Whitten DG. An Effective Approach to the Disinfection of Pathogens: Cationic Conjugated Polyelectrolytes and Oligomers. ACS APPLIED BIO MATERIALS 2023; 6:2916-2924. [PMID: 37417798 DOI: 10.1021/acsabm.2c01011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
The synthetic cationic conjugated polyelectrolytes and oligomers have demonstrated great effectiveness and versatility as antimicrobial materials. They have the ability to eliminate or render inactive various pathogens, including viruses like SARS-CoV-2, bacteria, and fungi. These pathogens can be rapidly eradicated when the polyelectrolytes and oligomers are applied as sprays, wipes, or coatings on solid surfaces. Inactivation of the pathogens occurs through two distinct processes: a non-light-activated process similar to Quats, and a more efficient and faster process that is triggered by light. These materials possess fluorescence and photosensitizing properties, enabling prolonged protection when coated on surfaces. The level of fluorescence exhibited by samples applied to nonfluorescent surfaces serves as an indicator of the coating's integrity and viability, making it easily detectable. Importantly, these materials demonstrate low toxicity towards mammalian cells and human skin, allowing for their safe use. While they can serve as durable coatings for pathogen protection, extended exposure to visible or ultraviolet light leads to their photochemical degradation. Our research also suggests that these materials act against pathogens through nonspecific mechanisms, minimizing the likelihood of pathogens developing resistance and rendering the materials ineffective.
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2
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Monge FA, Fanni AM, Donabedian PL, Hulse J, Maphis NM, Jiang S, Donaldson TN, Clark BJ, Whitten DG, Bhaskar K, Chi EY. Selective In Vitro and Ex Vivo Staining of Brain Neurofibrillary Tangles and Amyloid Plaques by Novel Ethylene Ethynylene-Based Optical Sensors. BIOSENSORS 2023; 13:151. [PMID: 36831917 PMCID: PMC9953543 DOI: 10.3390/bios13020151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/05/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
The identification of protein aggregates as biomarkers for neurodegeneration is an area of interest for disease diagnosis and treatment development. In this work, we present novel super luminescent conjugated polyelectrolyte molecules as ex vivo sensors for tau-paired helical filaments (PHFs) and amyloid-β (Aβ) plaques. We evaluated the use of two oligo-p-phenylene ethynylenes (OPEs), anionic OPE12- and cationic OPE24+, as stains for fibrillar protein pathology in brain sections of transgenic mouse (rTg4510) and rat (TgF344-AD) models of Alzheimer's disease (AD) tauopathy, and post-mortem brain sections from human frontotemporal dementia (FTD). OPE12- displayed selectivity for PHFs in fluorimetry assays and strong staining of neurofibrillary tangles (NFTs) in mouse and human brain tissue sections, while OPE24+ stained both NFTs and Aβ plaques. Both OPEs stained the brain sections with limited background or non-specific staining. This novel family of sensors outperformed the gold-standard dye Thioflavin T in sensing capacities and co-stained with conventional phosphorylated tau (AT180) and Aβ (4G8) antibodies. As the OPEs readily bind protein amyloids in vitro and ex vivo, they are selective and rapid tools for identifying proteopathic inclusions relevant to AD. Such OPEs can be useful in understanding pathogenesis and in creating in vivo diagnostically relevant detection tools for neurodegenerative diseases.
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Affiliation(s)
- Florencia A. Monge
- Biomedical Engineering Graduate Program, University of New Mexico, Albuquerque, NM 87131, USA
- Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA
| | - Adeline M. Fanni
- Biomedical Engineering Graduate Program, University of New Mexico, Albuquerque, NM 87131, USA
- Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA
| | - Patrick L. Donabedian
- Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA
- Nanoscience and Microsystems Engineering Graduate Program, University of New Mexico, Albuquerque, NM 87131, USA
| | - Jonathan Hulse
- Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Nicole M. Maphis
- Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM 87131, USA
- Department of Neuroscience, University of New Mexico, Albuquerque, NM 87131, USA
| | - Shanya Jiang
- Department of Neuroscience, University of New Mexico, Albuquerque, NM 87131, USA
- Sartorius, Bohemia, NY 11716, USA
| | - Tia N. Donaldson
- Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Benjamin J. Clark
- Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA
| | - David G. Whitten
- Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA
- Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM 87131, USA
| | - Kiran Bhaskar
- Department of Neuroscience, University of New Mexico, Albuquerque, NM 87131, USA
| | - Eva Y. Chi
- Center for Biomedical Engineering, University of New Mexico, Albuquerque, NM 87131, USA
- Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA
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3
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Kaya K, Khalil M, Fetrow B, Fritz H, Jagadesan P, Bondu V, Ista L, Chi EY, Schanze KS, Whitten DG, Kell A. Rapid and Effective Inactivation of SARS-CoV-2 with a Cationic Conjugated Oligomer with Visible Light: Studies of Antiviral Activity in Solutions and on Supports. ACS APPLIED MATERIALS & INTERFACES 2022; 14:4892-4898. [PMID: 35040619 PMCID: PMC8790820 DOI: 10.1021/acsami.1c19716] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/30/2021] [Indexed: 05/12/2023]
Abstract
This paper presents results of a study of a new cationic oligomer that contains end groups and a chromophore affording inactivation of SARS-CoV-2 by visible light irradiation in solution or as a solid coating on paper wipes and glass fiber filtration substrates. A key finding of this study is that the cationic oligomer with a central thiophene ring and imidazolium charged groups gives outstanding performance in both the killing of E. coli bacterial cells and inactivation of the virus at very short times. Our introduction of cationic N-methyl imidazolium groups enhances the light activation process for both E. coli and SARS-CoV-2 but dampens the killing of the bacteria and eliminates the inactivation of the virus in the dark. For the studies with this oligomer in solution at a concentration of 1 μg/mL and E. coli, we obtain 3 log killing of the bacteria with 10 min of irradiation with LuzChem cool white lights (mimicking indoor illumination). With the oligomer in solution at a concentration of 10 μg/mL, we observe 4 log inactivation (99.99%) in 5 min of irradiation and total inactivation after 10 min. The oligomer is quite active against E. coli on oligomer-coated paper wipes and glass fiber filter supports. The SARS-CoV-2 is also inactivated by oligomer-coated glass fiber filter papers. This study indicates that these oligomer-coated materials may be very useful as wipes and filtration materials.
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Affiliation(s)
- Kemal Kaya
- Department
of Chemistry and Chemical Biology, University
of New Mexico, Albuquerque, New Mexico 87131-0001, United States
- Department
of Biochemistry, Kutahya Dumlupinar University, Kutahya 43000, Turkey
| | - Mohammed Khalil
- Center
for Biomedical Engineering and Department of Chemical and Biological
Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Benjamin Fetrow
- Center
for Biomedical Engineering and Department of Chemical and Biological
Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Hugh Fritz
- Department
of Chemistry and Chemical Biology, University
of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Pradeepkumar Jagadesan
- Department
of Chemistry, University of Texas at San
Antonio, San Antonio, Texas 78249-1644, United States
| | - Virginie Bondu
- Department
of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque, New Mexico 87131-0001, United States
| | - Linnea Ista
- Center
for Biomedical Engineering and Department of Chemical and Biological
Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Eva Y. Chi
- Center
for Biomedical Engineering and Department of Chemical and Biological
Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Kirk S. Schanze
- Department
of Chemistry, University of Texas at San
Antonio, San Antonio, Texas 78249-1644, United States
| | - David G. Whitten
- Center
for Biomedical Engineering, Department of Chemistry and Chemical Biology,
and Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Alison Kell
- Department
of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque, New Mexico 87131-0001, United States
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4
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Monge F, Jagadesan P, Bondu V, Donabedian PL, Ista L, Chi EY, Schanze KS, Whitten DG, Kell AM. Highly Effective Inactivation of SARS-CoV-2 by Conjugated Polymers and Oligomers. ACS APPLIED MATERIALS & INTERFACES 2020; 12:55688-55695. [PMID: 33267577 PMCID: PMC7724758 DOI: 10.1021/acsami.0c17445] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/18/2020] [Indexed: 05/08/2023]
Abstract
In the present study, we examined the inactivation of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by synthetic conjugated polymers and oligomers developed in our laboratories as antimicrobials for bacteria, fungi, and nonenveloped viruses. The results show highly effective light-induced inactivation with several of these oligomers and polymers including irradiation with near-UV and visible light. In the best case, one oligomer induced a 5-log reduction in pfu/mL within 10 min. In general, the oligomers are more active than the polymers; however, the polymers are active with longer wavelength visible irradiation. Although not studied quantitatively, the results show that in the presence of the agents at concentrations similar to those used in the light studies, there is essentially no dark inactivation of the virus. Because three of the five materials/compounds examined are quaternary ammonium derivatives, this study indicates that conventional quaternary ammonium antimicrobials may not be active against SARS-CoV-2. Our results suggest several applications involving the incorporation of these materials in wipes, sprays, masks, and clothing and other personal protection equipment that can be useful in preventing infections and the spreading of this deadly virus and future outbreaks from similar viruses.
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Affiliation(s)
- Florencia
A. Monge
- Center
for Biomedical Engineering, University of
New Mexico, Albuquerque 87131-0001, New Mexico, United States
- Biomedical
Engineering Graduate Program, University
of New Mexico, Albuquerque 87131-0001, New Mexico, United States
| | - Pradeepkumar Jagadesan
- Department
of Chemistry, University of Texas at San
Antonio, San Antonio 78249-1644, Texas, United States
| | - Virginie Bondu
- Department
of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque 87131-0001, New Mexico, United States
| | - Patrick L. Donabedian
- Center
for Biomedical Engineering, University of
New Mexico, Albuquerque 87131-0001, New Mexico, United States
- Nanoscience
and Microsystems Engineering Graduate Program, University of New Mexico, Albuquerque 87131-0001, New Mexico, United States
| | - Linnea Ista
- Center
for Biomedical Engineering, University of
New Mexico, Albuquerque 87131-0001, New Mexico, United States
- Department
of Chemical and Biological Engineering, University of New Mexico, Albuquerque 87131, New Mexico, United States
| | - Eva Y. Chi
- Center
for Biomedical Engineering, University of
New Mexico, Albuquerque 87131-0001, New Mexico, United States
- Department
of Chemical and Biological Engineering, University of New Mexico, Albuquerque 87131, New Mexico, United States
| | - Kirk S. Schanze
- Department
of Chemistry, University of Texas at San
Antonio, San Antonio 78249-1644, Texas, United States
| | - David G. Whitten
- Center
for Biomedical Engineering, University of
New Mexico, Albuquerque 87131-0001, New Mexico, United States
- Department
of Chemical and Biological Engineering, University of New Mexico, Albuquerque 87131, New Mexico, United States
- Department
of Chemistry and Chemical Biology, University
of New Mexico, Albuquerque 87131-0001, New Mexico, United States
| | - Alison M. Kell
- Department
of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque 87131-0001, New Mexico, United States
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5
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Schanze KS, Whitten DG, Kell AM, Chi EY, Ista LK, Monge FA, Jagadesan P, Bondu V, Donabedian PL. Highly Effective Inactivation of SARS-CoV-2 by Conjugated Polymers and Oligomers. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2020:2020.09.29.20204164. [PMID: 33052358 PMCID: PMC7553178 DOI: 10.1101/2020.09.29.20204164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The current Covid-19 Pandemic caused by the highly contagious SARS-CoV-2 virus has proven extremely difficult to prevent or control. Currently there are few treatment options and very few long-lasting disinfectants available to prevent the spread. While masks and protective clothing and social distancing may offer some protection, their use has not always halted or slowed the spread. Several vaccines are currently undergoing testing; however there is still a critical need to provide new methods for inactivating the virus before it can spread and infect humans. In the present study we examined the inactivation of SARS-CoV-2 by synthetic conjugated polymers and oligomers developed in our laboratories as antimicrobials for bacteria, fungi and non-enveloped viruses. Our results show that we can obtain highly effective light induced inactivation with several of these oligomers and polymers including irradiation with near-UV and visible light. With both the oligomers and polymers, we can reach several logs of inactivation with relatively short irradiation times. Our results suggest several applications involving the incorporation of these materials in wipes, sprays, masks and clothing and other Personal Protection Equipment (PPE) that can be useful in preventing infections and the spreading of this deadly virus and future outbreaks from similar viruses.
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Milite C. Patent evaluation of WO2019209182 (A1) 2019-10-31 (Conjugated Oligoelectrolytes as Antimicrobial Agents). Expert Opin Ther Pat 2020; 30:911-915. [PMID: 32930639 DOI: 10.1080/13543776.2020.1822818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
INTRODUCTION The insurgence of antibiotic resistance represents one of the biggest public health challenges of our times. During the years, different compounds were developed to fight against resistant bacterial cells, exploiting different mechanisms of action. AREAS COVERED The patent application describes a set of antimicrobial compounds bearing to the class of the conjugated oligoelectrolytes (COEs). These are molecules characterized by hydrophobic conjugated backbone and terminal polar ionic pendants, able to intercalate into lipid bilayers of bacterial cells. The patent reports the preparation of 15 new compounds and the evaluation of their antimicrobial effect against ESKAPE pathogens ( E nterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp.). EXPERT OPINION The preparation of the compounds claimed is simple and the preliminary activity data are very interesting. Among the claimed compounds, COE-D8, COE-T42, and COE-T62 have the ability to strongly inhibit the bacterial growth at doses similar to the ones of last resource antibiotics. Unfortunately, no in-vivo data are reported. Moreover, the presence of several quaternary amines limits the potential application of these compounds only to topical uses.
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Affiliation(s)
- Ciro Milite
- Department of Pharmacy, Epigenetic Medicinal Chemistry Laboratory, University of Salerno , Fisciano, Italy
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7
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How to select the appropriate method(s) of cytotoxicity analysis of mammalian cells at biointerfaces: A tutorial. Biointerphases 2020; 15:031201. [DOI: 10.1116/6.0000136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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8
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Abstract
Each year, the United States spends about $20 billion to treat people who have been infected with antibiotic resistant bacteria. Even so, the development of new antibiotics has slowed considerably since the mid-20th century. As a result, researchers are looking into developing synthetic compounds and materials with antimicrobial activities such as those made by the Schanze and Whitten groups [ACS Appl. Mater. Interfaces 3, 2820 (2011)]. Previously, they have demonstrated that poly(phenylene ethynylene) (PPE) based electrolytes and oligomeric end-only phenylene ethynylene (EO-OPE) based electrolytes possess strong biocidal activity. However, before the PPE and OPE can be used with humans, skin irritation tests are required to ensure their safety. In this work, in vitro skin assays are used to predict in vivo irritation. Tissues were conditioned for 24 h, exposed to test substances for 1 h, and then tested for viability using colorimetric and cytokine assays. Concentrations up to 50 μg/ml were tested. Viability assays and cytokine (IL-1α) assays demonstrated that the two polymers, three symmetric oligomers, and three "end only" oligomers were nonirritants. In addition, electrospun mats consisting of several promising compounds, including poly(caprolactone), were evaluated. Therefore, all test substances are conservatively classified as nonirritants after a 1 h exposure time period.
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9
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Antifungal Properties of Cationic Phenylene Ethynylenes and Their Impact on β-Glucan Exposure. Antimicrob Agents Chemother 2016; 60:4519-29. [PMID: 27161628 DOI: 10.1128/aac.00317-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 05/04/2016] [Indexed: 02/06/2023] Open
Abstract
Candida species are the cause of many bloodstream infections through contamination of indwelling medical devices. These infections account for a 40% mortality rate, posing a significant risk to immunocompromised patients. Traditional treatments against Candida infections include amphotericin B and various azole treatments. Unfortunately, these treatments are associated with high toxicity, and resistant strains have become more prevalent. As a new frontier, light-activated phenylene ethynylenes have shown promising biocidal activity against Gram-positive and -negative bacterial pathogens, as well as the environmental yeast Saccharomyces cerevisiae In this study, we monitored the viability of Candida species after treatment with a cationic conjugated polymer [poly(p-phenylene ethynylene); PPE] or oligomer ["end-only" oligo(p-phenylene ethynylene); EO-OPE] by flow cytometry in order to explore the antifungal properties of these compounds. The oligomer was found to disrupt Candida albicans yeast membrane integrity independent of light activation, while PPE is able to do so only in the presence of light, allowing for some control as to the manner in which cytotoxic effects are induced. The contrast in killing efficacy between the two compounds is likely related to their size difference and their intrinsic abilities to penetrate the fungal cell wall. Unlike EO-OPE-DABCO (where DABCO is quaternized diazabicyclo[2,2,2]octane), PPE-DABCO displayed a strong propensity to associate with soluble β-glucan, which is expected to inhibit its ability to access and perturb the inner cell membrane of Candida yeast. Furthermore, treatment with PPE-DABCO unmasked Candida albicans β-glucan and increased phagocytosis by Dectin-1-expressing HEK-293 cells. In summary, cationic phenylene ethynylenes show promising biocidal activity against pathogenic Candida yeast cells while also exhibiting immunostimulatory effects.
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10
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Wu W, Feng G, Xu S, Liu B. A Photostable Far-Red/Near-Infrared Conjugated Polymer Photosensitizer with Aggregation-Induced Emission for Image-Guided Cancer Cell Ablation. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00958] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Wenbo Wu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
- Department
of Materials Science and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574
| | - Guangxue Feng
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Shidang Xu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Bin Liu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
- Institute of Materials
Research and Engineering (IMRE), 2
Fusionopolis Way, Innovis, Singapore 138634
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11
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Reusable nanoengineered surfaces for bacterial recruitment and decontamination. Biointerphases 2016; 11:019003. [DOI: 10.1116/1.4939239] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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12
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Thapa A, Jett SD, Chi EY. Curcumin Attenuates Amyloid-β Aggregate Toxicity and Modulates Amyloid-β Aggregation Pathway. ACS Chem Neurosci 2016; 7:56-68. [PMID: 26529184 DOI: 10.1021/acschemneuro.5b00214] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The abnormal misfolding and aggregation of amyloid-β (Aβ) peptides into β-sheet enriched insoluble deposits initiates a cascade of events leading to pathological processes and culminating in cognitive decline in Alzheimer's disease (AD). In particular, soluble oligomeric/prefibrillar Aβ have been shown to be potent neurotoxins. The naturally occurring polyphenol curcumin has been shown to exert a neuroprotective effect against age-related neurodegenerative diseases such as AD. However, its protective mechanism remains unclear. In this study, we investigated the effects of curcumin on the aggregation of Aβ40 as well as Aβ40 aggregate induced neurotoxicity. Our results show that the curcumin does not inhibit Aβ fibril formation, but rather enriches the population of "off-pathway" soluble oligomers and prefibrillar aggregates that were nontoxic. Curcumin also exerted a nonspecific neuroprotective effect, reducing toxicities induced by a range of Aβ conformers, including monomeric, oligomeric, prefibrillar, and fibrillar Aβ. The neuroprotective effect is possibly membrane-mediated, as curcumin reduced the extent of cell membrane permeabilization induced by Aβ aggregates. Taken together, our study shows that curcumin exerts its neuroprotective effect against Aβ induced toxicity through at least two concerted pathways, modifying the Aβ aggregation pathway toward the formation of nontoxic aggregates and ameliorating Aβ-induced toxicity possibly through a nonspecific pathway.
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Affiliation(s)
- Arjun Thapa
- Department
of Chemical and Biological Engineering
and the Center for Biomedical Engineering, and ‡Department of Cell Biology
and Physiology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Stephen D. Jett
- Department
of Chemical and Biological Engineering
and the Center for Biomedical Engineering, and ‡Department of Cell Biology
and Physiology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Eva Y. Chi
- Department
of Chemical and Biological Engineering
and the Center for Biomedical Engineering, and ‡Department of Cell Biology
and Physiology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, New Mexico 87131, United States
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13
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Pappas HC, Lovchik JA, Whitten DG. Assessing the Sporicidal Activity of Oligo-p-phenylene Ethynylenes and Their Role as Bacillus Germinants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4481-4489. [PMID: 25822668 DOI: 10.1021/acs.langmuir.5b00064] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A wide range of oligo-p-phenylene ethynylenes has been shown to exhibit good biocidal activity against both Gram-negative and Gram-positive bacteria. While cell death may occur in the dark, these biocidal compounds are far more effective in the light as a result of their ability to sensitize the production of cell-damaging reactive oxygen species. In these studies, the interactions of a specific cationic oligo-p-phenylene ethynylene with spore-forming Bacillus atrophaeus and Bacillus anthracis Sterne have been investigated. Flow cytometry assays are used to rapidly monitor cell death as well as spore germination. This compound effectively killed Bacillus anthracis Sterne vegetative cells (over 4 log reduction), presumably by severe perturbations of the bacterial cell wall and cytoplasmic membrane, while also acting as an effective spore germinant in the dark. While 2 log reduction of B. anthracis Sterne spores was observed, it is hypothesized that further killing could be achieved through enhanced germination.
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Affiliation(s)
- Harry C Pappas
- †The Nanoscience and Microsystems Engineering Program, University of New Mexico, 1 University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
- ‡Center for Biomedical Engineering, Department of Chemical and Biological Engineering, University of New Mexico, 1 University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - Julie A Lovchik
- §Department of Internal Medicine, University of New Mexico Health Sciences Center, 1 University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
| | - David G Whitten
- ‡Center for Biomedical Engineering, Department of Chemical and Biological Engineering, University of New Mexico, 1 University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
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14
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Gao M, Hu Q, Feng G, Tomczak N, Liu R, Xing B, Tang BZ, Liu B. A multifunctional probe with aggregation-induced emission characteristics for selective fluorescence imaging and photodynamic killing of bacteria over mammalian cells. Adv Healthc Mater 2015; 4:659-63. [PMID: 25530179 DOI: 10.1002/adhm.201400654] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 11/29/2014] [Indexed: 12/13/2022]
Abstract
A multifunctional probe aggregation-induced emission-Zinc(II)-dipicolylamine (AIE-ZnDPA) is developed for selective targeting, fluorescence imaging, and photodynamic killing of both Gram-positive and Gram-negative bacteria over mammalian cells. The probe has significant advantages in simple probe design, enhanced fluorescence upon bacteria binding, excellent photostability, and broad-spectrum antibacterial activity with almost no harm to mammalian cells.
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Affiliation(s)
- Meng Gao
- Institute of Materials Research Engineering (A*STAR); 3 Research Link Singapore 117602
| | - Qinglian Hu
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 Singapore 117585
| | - Guangxue Feng
- Department of Chemistry Division of Biomedical Engineering; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong China
| | - Nikodem Tomczak
- Institute of Materials Research Engineering (A*STAR); 3 Research Link Singapore 117602
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543
| | - Rongrong Liu
- Institute of Materials Research Engineering (A*STAR); 3 Research Link Singapore 117602
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry; Nanyang Technological University; Singapore 637371
| | - Ben Zhong Tang
- SCUT-HKUST Joint Research Laboratory; Guangdong Innovative Research Team; State Key Laboratory of Luminescent Materials & Devices; South China University of Technology; Guangzhou 510640 China
| | - Bin Liu
- Institute of Materials Research Engineering (A*STAR); 3 Research Link Singapore 117602
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 Singapore 117585
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15
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Fernandes MM, Francesko A, Torrent-Burgués J, Carrión-Fité FJ, Heinze T, Tzanov T. Sonochemically Processed Cationic Nanocapsules: Efficient Antimicrobials with Membrane Disturbing Capacity. Biomacromolecules 2014; 15:1365-74. [DOI: 10.1021/bm4018947] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Margarida M. Fernandes
- Grup
de Biotecnologia Molecular i Industrial, Department d’Enginyeria
Química, Universitat Politècnica de Catalunya, Rambla
Sant Nebridi 22, 08222 Terrassa, Spain
| | - Antonio Francesko
- Grup
de Biotecnologia Molecular i Industrial, Department d’Enginyeria
Química, Universitat Politècnica de Catalunya, Rambla
Sant Nebridi 22, 08222 Terrassa, Spain
| | - Juan Torrent-Burgués
- Grup
de Biotecnologia Molecular i Industrial, Department d’Enginyeria
Química, Universitat Politècnica de Catalunya, Rambla
Sant Nebridi 22, 08222 Terrassa, Spain
| | - F. Javier Carrión-Fité
- Instituto
de Investigación Textil y C.I. de Terrassa Laboratorio de Tensioactivos
y Detergencia, Departamento de Ingeniería Textil y Papelera, Universitat Politècnica de Catalunya, Colom 1508222 Terrassa, Spain
| | - Thomas Heinze
- Center
of Excellence for Polysaccharide Research, Institute of Organic Chemistry
and Macromolecular Chemistry, Friedrich Schiller University of Jena, Humboldtstraße 10, 07743 Jena, Germany
| | - Tzanko Tzanov
- Grup
de Biotecnologia Molecular i Industrial, Department d’Enginyeria
Química, Universitat Politècnica de Catalunya, Rambla
Sant Nebridi 22, 08222 Terrassa, Spain
| |
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