1
|
Stepanova M, Levit M, Egorova T, Nashchekina Y, Sall T, Demyanova E, Guryanov I, Korzhikova-Vlakh E. Poly(2-Deoxy-2-Methacrylamido-D-Glucose)-Based Complex Conjugates of Colistin, Deferoxamine and Vitamin B12: Synthesis and Biological Evaluation. Pharmaceutics 2024; 16:1080. [PMID: 39204425 PMCID: PMC11359296 DOI: 10.3390/pharmaceutics16081080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Revised: 08/13/2024] [Accepted: 08/15/2024] [Indexed: 09/04/2024] Open
Abstract
Growing resistance to traditional antibiotics poses a global threat to public health. In this regard, modification of known antibiotics, but with limited applications due to side effects, is one of the extremely promising approaches at present. In this study, we proposed the synthesis of novel complex polymeric conjugates of the peptide antibiotic colistin (CT). A biocompatible and water-soluble synthetic glycopolymer, namely, poly(2-deoxy-2-methacrylamido-D-glucose) (PMAG), was used as a polymer carrier. In addition to monoconjugates containing CT linked to PMAG by hydrolyzable and stable bonds, a set of complex conjugates also containing the siderophore deferoxamine (DFOA) and vitamin B12 was developed. The structures of the conjugates were confirmed by 1H NMR and FTIR-spectroscopy, while the compositions of conjugates were determined by UV-Vis spectrophotometry and HPLC analysis. The buffer media with pH 7.4, corresponding to blood or ileum pH, and 5.2, corresponding to the intestinal pH after ingestion or pH in the focus of inflammation, were used to study the release of CT. The resulting conjugates were examined for cytotoxicity and antimicrobial activity. All conjugates showed less cytotoxicity than free colistin. A Caco-2 cell permeability assay was carried out for complex conjugates to simulate the drug absorption in the intestine. In contrast to free CT, which showed very low permeability through the Caco-2 monolayer, the complex polymeric conjugates of vitamin B12 and CT provided significant transport. The antimicrobial activity of the conjugates depended on the conjugate composition. It was found that conjugates containing CT linked to the polymer by a hydrolyzable bond were found to be more active than conjugates with a non-hydrolyzable bond between CT and PMAG. Conjugates containing DFOA complexed with Fe3+ were characterized by enhanced antimicrobial activity against Pseudomonas aeruginosa compared to other conjugates.
Collapse
Affiliation(s)
- Mariia Stepanova
- Institute of Macromolecular Compounds of Russian Academy of Sciences, 199004 St. Petersburg, Russia; (M.S.); (M.L.)
| | - Mariia Levit
- Institute of Macromolecular Compounds of Russian Academy of Sciences, 199004 St. Petersburg, Russia; (M.S.); (M.L.)
| | - Tatiana Egorova
- Institute of Highly Pure Biopreparations, 197110 St. Petersburg, Russia; (T.E.); (E.D.)
| | - Yulia Nashchekina
- Institute of Cytology of Russian Academy of Sciences, 194064 St. Petersburg, Russia;
| | - Tatiana Sall
- Institute of Experimental Medicine, 197022 St. Petersburg, Russia;
| | - Elena Demyanova
- Institute of Highly Pure Biopreparations, 197110 St. Petersburg, Russia; (T.E.); (E.D.)
| | - Ivan Guryanov
- Institute of Chemistry, St. Petersburg State University, 198504 St. Petersburg, Russia
| | - Evgenia Korzhikova-Vlakh
- Institute of Macromolecular Compounds of Russian Academy of Sciences, 199004 St. Petersburg, Russia; (M.S.); (M.L.)
| |
Collapse
|
2
|
Rizzo S, Varache M, Sayers EJ, Jones AT, Tonks A, Thomas DW, Ferguson EL. Modification of the Antibiotic, Colistin, with Dextrin Causes Enhanced Cytotoxicity and Triggers Apoptosis in Myeloid Leukemia. Int J Nanomedicine 2024; 19:5419-5437. [PMID: 38868592 PMCID: PMC11166864 DOI: 10.2147/ijn.s449185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 04/16/2024] [Indexed: 06/14/2024] Open
Abstract
Introduction Acute myeloid leukemia (AML) remains difficult to treat due to its heterogeneity in molecular landscape, epigenetics and cell signaling alterations. Precision medicine is a major goal in AML therapy towards developing agents that can be used to treat patients with different 'subtypes' in combination with current chemotherapies. We have previously developed dextrin-colistin conjugates to combat the rise in multi-drug resistant bacterial infections and overcome dose-limiting nephrotoxicity. Recent evidence of colistin's anticancer activity, mediated through inhibition of intracellular lysine-specific histone demethylase 1 (LSD1/KDM1A), suggests that dextrin-colistin conjugates could be used to treat cancer cells, including AML. This study aimed to evaluate whether dextrin conjugation (which reduces in vivo toxicity and prolongs plasma half-life) could enhance colistin's cytotoxic effects in myeloid leukemia cell lines and compare the intracellular uptake and localization of the free and conjugated antibiotic. Results Our results identified a conjugate (containing 8000 g/mol dextrin with 1 mol% succinoylation) that caused significantly increased toxicity in myeloid leukemia cells, compared to free colistin. Dextrin conjugation altered the mechanism of cell death by colistin, from necrosis to caspase 3/7-dependent apoptosis. In contrast, conjugation via a reversible ester linker, instead of an amide, had no effect on the mechanism of the colistin-induced cell death. Live cell confocal microscopy of fluorescently labelled compounds showed both free and dextrin-conjugated colistins were endocytosed and co-localized in lysosomes, and increasing the degree of modification by succinoylation of dextrin significantly reduced colistin internalization. Discussion Whilst clinical translation of dextrin-colistin conjugates for the treatment of AML is unlikely due to the potential to promote antimicrobial resistance (AMR) and the relatively high colistin concentrations required for anticancer activity, the ability to potentiate the effectiveness of an anticancer drug by polymer conjugation, while reducing side effects and improving biodistribution of the drug, is very attractive, and this approach warrants further investigation.
Collapse
Affiliation(s)
- Siân Rizzo
- Advanced Therapies Group, School of Dentistry, Cardiff University, Cardiff, UK
| | - Mathieu Varache
- Advanced Therapies Group, School of Dentistry, Cardiff University, Cardiff, UK
| | - Edward J Sayers
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | - Arwyn T Jones
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | - Alex Tonks
- Department of Haematology, School of Medicine, Cardiff University, Cardiff, UK
| | - David W Thomas
- Advanced Therapies Group, School of Dentistry, Cardiff University, Cardiff, UK
| | - Elaine L Ferguson
- Advanced Therapies Group, School of Dentistry, Cardiff University, Cardiff, UK
| |
Collapse
|
3
|
Varache M, Rizzo S, Sayers EJ, Newbury L, Mason A, Liao CT, Chiron E, Bourdiec N, Jones A, Fraser DJ, Taylor PR, Jones AT, Thomas DW, Ferguson EL. Dextrin conjugation to colistin inhibits its toxicity, cellular uptake and acute kidney injury in vivo. RSC PHARMACEUTICS 2024; 1:68-79. [PMID: 38646595 PMCID: PMC11024668 DOI: 10.1039/d3pm00014a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/04/2024] [Indexed: 04/23/2024]
Abstract
The acute kidney injury (AKI) and dose-limiting nephrotoxicity, which occurs in 20-60% of patients following systemic administration of colistin, represents a challenge in the effective treatment of multi-drug resistant Gram-negative infections. To reduce clinical toxicity of colistin and improve targeting to infected/inflamed tissues, we previously developed dextrin-colistin conjugates, whereby colistin is designed to be released by amylase-triggered degradation of dextrin in infected and inflamed tissues, after passive targeting by the enhanced permeability and retention effect. Whilst it was evident in vitro that polymer conjugation can reduce toxicity and prolong plasma half-life, without significant reduction in antimicrobial activity of colistin, it was unclear how dextrin conjugation would alter cellular uptake and localisation of colistin in renal tubular cells in vivo. We discovered that dextrin conjugation effectively reduced colistin's toxicity towards human kidney proximal tubular epithelial cells (HK-2) in vitro, which was mirrored by significantly less cellular uptake of Oregon Green (OG)-labelled dextrin-colistin conjugate, when compared to colistin. Using live-cell confocal imaging, we revealed localisation of both, free and dextrin-bound colistin in endolysosome compartments of HK-2 and NRK-52E cells. Using a murine AKI model, we demonstrated dextrin-colistin conjugation dramatically diminishes both proximal tubular injury and renal accumulation of colistin. These findings reveal new insight into the mechanism by which dextrin conjugation can overcome colistin's renal toxicity and show the potential of polymer conjugation to improve the side effect profile of nephrotoxic drugs.
Collapse
Affiliation(s)
- Mathieu Varache
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Siân Rizzo
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Edward J Sayers
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University CF10 3NB UK
| | - Lucy Newbury
- Wales Kidney Research Unit, Division of Infection and Immunity, School of Medicine, College of Biomedical and Life Sciences, Cardiff University Cardiff CF14 4XN UK
| | - Anna Mason
- Wales Kidney Research Unit, Division of Infection and Immunity, School of Medicine, College of Biomedical and Life Sciences, Cardiff University Cardiff CF14 4XN UK
| | - Chia-Te Liao
- Systems Immunity Research Institute, Division of Infection and Immunity, School of Medicine, Cardiff University Cardiff CF14 4XN UK
| | - Emilie Chiron
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Nathan Bourdiec
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Adam Jones
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
- Cellular Pathology Department, University Dental Hospital, Cardiff and Vale University Health Board Cardiff CF14 4XY UK
| | - Donald J Fraser
- Wales Kidney Research Unit, Division of Infection and Immunity, School of Medicine, College of Biomedical and Life Sciences, Cardiff University Cardiff CF14 4XN UK
| | - Philip R Taylor
- Systems Immunity Research Institute, Division of Infection and Immunity, School of Medicine, Cardiff University Cardiff CF14 4XN UK
- UK Dementia Research Institute at Cardiff Hadyn Ellis Building Maindy Road Cardiff CF24 4HQ UK
| | - Arwyn T Jones
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University CF10 3NB UK
| | - David W Thomas
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
- Systems Immunity Research Institute, Division of Infection and Immunity, School of Medicine, Cardiff University Cardiff CF14 4XN UK
| | - Elaine L Ferguson
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| |
Collapse
|
4
|
Dubashynskaya NV, Bokatyi AN, Sall TS, Egorova TS, Nashchekina YA, Dubrovskii YA, Murashko EA, Vlasova EN, Demyanova EV, Skorik YA. Cyanocobalamin-Modified Colistin-Hyaluronan Conjugates: Synthesis and Bioactivity. Int J Mol Sci 2023; 24:11550. [PMID: 37511308 PMCID: PMC10380726 DOI: 10.3390/ijms241411550] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/06/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Polymeric drug delivery systems enhance the biopharmaceutical properties of antibiotics by increasing their bioavailability, providing programmable and controlled-release properties, and reducing toxicity. In addition, drug delivery systems are a promising strategy to improve the intestinal permeability of various antimicrobial agents, including colistin (CT). This study describes the modification of conjugates based on CT and hyaluronic acid (HA) with cyanocobalamin (vitamin B12). Vitamin B12 was chosen as a targeting ligand because it has its own absorption pathway in the small intestine. The resulting polysaccharide conjugates contained 95 μg/mg vitamin B12 and the CT content was 335 μg/mg; they consisted of particles of two sizes, 98 and 702 nm, with a ζ-potential of approximately -25 mV. An in vitro release test at pH 7.4 and pH 5.2 showed an ultra-slow release of colistin of approximately 1% after 10 h. The modified B12 conjugates retained their antimicrobial activity at the level of pure CT (minimum inhibitory concentration was 2 μg/mL). The resulting delivery systems also reduced the nephrotoxicity of CT by 30-40% (HEK 293 cell line). In addition, the modification of B12 improved the intestinal permeability of CT, and the apparent permeability coefficient of HA-CT-B12 conjugates was 3.5 × 10-6 cm/s, corresponding to an in vivo intestinal absorption of 50-100%. Thus, vitamin-B12-modified conjugates based on CT and HA may be promising oral delivery systems with improved biopharmaceutical properties.
Collapse
Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Tatiana S Sall
- Institute of Experimental Medicine, Acad. Pavlov St. 12, St. Petersburg 197376, Russia
| | - Tatiana S Egorova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St. Petersburg 197110, Russia
| | - Yuliya A Nashchekina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky 4, St. Petersburg 194064, Russia
| | - Yaroslav A Dubrovskii
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russia
| | - Ekaterina A Murashko
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russia
| | - Elena N Vlasova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| | - Elena V Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St. Petersburg 197110, Russia
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russia
| |
Collapse
|
5
|
Dvoretckaia A, Egorova T, Dzhuzha A, Levit M, Sivtsov E, Demyanova E, Korzhikova-Vlakh E. Polymyxin B Conjugates with Bio-Inspired Synthetic Polymers of Different Nature. Int J Mol Sci 2023; 24:ijms24031832. [PMID: 36768160 PMCID: PMC9915011 DOI: 10.3390/ijms24031832] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/12/2023] [Accepted: 01/14/2023] [Indexed: 01/19/2023] Open
Abstract
The emergence and growth of bacterial resistance to antibiotics poses an enormous threat to humanity in the future. In this regard, the discovery of new antibiotics and the improvement of existing ones is a priority task. In this study, we proposed the synthesis of new polymeric conjugates of polymyxin B, which is a clinically approved but limited-use peptide antibiotic. In particular, three carboxylate-bearing polymers and one synthetic glycopolymer were selected for conjugation with polymyxin B (PMX B), namely, poly(α,L-glutamic acid) (PGlu), copolymer of L-glutamic acid and L-phenylalanine (P(Glu-co-Phe)), copolymer of N-vinyl succinamic acid and N-vinylsuccinimide (P(VSAA-co-VSI)), and poly(2-deoxy-2-methacrylamido-D-glucose) (PMAG). Unlike PGlu and PMAG, P(Glu-co-Phe) and P(VSAA-co-VSI) are amphiphilic and form nanoparticles in aqueous media. A number of conjugates with different polymyxin B loading were synthesized and characterized. In addition, the complex conjugates of PGLu or PMAG with polymyxin B and deferoxamine (siderophore) were obtained. A release of PMX B from Schiff base and amide-linked polymer conjugates was studied in model buffer media with pH 7.4 and 5.8. In both cases, a more pronounced release was observed under slightly acidic conditions. The cytotoxicity of free polymers and PMX B as well as their conjugates was examined in human embryonic kidney cells (HEK 293T cell line). All conjugates demonstrated reduced cytotoxicity compared to the free antibiotic. Finally, the antimicrobial efficacy of the conjugates against Pseudomonas aeruginosa was determined and compared. The lowest values of minimum inhibitory concentrations (MIC) were observed for polymyxin B and polymyxin B/deferoxamine conjugated with PMAG. Among the polymers tested, PMAG appears to be the most promising carrier for delivery of PMX B in conjugated form due to the good preservation of the antimicrobial properties of PMX B and the ability of controlled drug release.
Collapse
Affiliation(s)
- Anna Dvoretckaia
- Institute of Chemistry, Saint-Petersburg State University, 198504 St. Petersburg, Russia
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Tatiana Egorova
- State Research Institute of Highly Pure Biopreparations FMBA of Russia, 197110 St. Petersburg, Russia
| | - Apollinariia Dzhuzha
- Institute of Chemistry, Saint-Petersburg State University, 198504 St. Petersburg, Russia
| | - Mariia Levit
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Eugene Sivtsov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
- Department of Physical Chemistry, Saint-Petersburg State Institute of Technology (Technical University), 190013 St. Petersburg, Russia
| | - Elena Demyanova
- State Research Institute of Highly Pure Biopreparations FMBA of Russia, 197110 St. Petersburg, Russia
| | - Evgenia Korzhikova-Vlakh
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
- Correspondence:
| |
Collapse
|
6
|
Dubashynskaya NV, Bokatyi AN, Dobrodumov AV, Kudryavtsev IV, Trulioff AS, Rubinstein AA, Aquino AD, Dubrovskii YA, Knyazeva ES, Demyanova EV, Nashchekina YA, Skorik YA. Succinyl Chitosan-Colistin Conjugates as Promising Drug Delivery Systems. Int J Mol Sci 2022; 24:ijms24010166. [PMID: 36613610 PMCID: PMC9820547 DOI: 10.3390/ijms24010166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/11/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
The growth of microbial multidrug resistance is a problem in modern clinical medicine. Chemical modification of active pharmaceutical ingredients is an attractive strategy to improve their biopharmaceutical properties by increasing bioavailability and reducing drug toxicity. Conjugation of antimicrobial drugs with natural polysaccharides provides high efficiency of these systems due to targeted delivery, controlled drug release and reduced toxicity. This paper reports a two-step synthesis of colistin conjugates (CT) with succinyl chitosan (SucCS); first, we modified chitosan with succinyl anhydride to introduce a carboxyl function into the polymer molecule, which was then used for chemical grafting with amino groups of the peptide antibiotic CT using carbodiimide chemistry. The resulting polymeric delivery systems had a degree of substitution (DS) by CT of 3-8%, with conjugation efficiencies ranging from 54 to 100% and CT contents ranging from 130-318 μg/mg. The size of the obtained particles was 100-200 nm, and the ζ-potential varied from -22 to -28 mV. In vitro release studies at pH 7.4 demonstrated ultra-slow hydrolysis of amide bonds, with a CT release of 0.1-0.5% after 12 h; at pH 5.2, the hydrolysis rate slightly increased; however, it remained extremely low (1.5% of CT was released after 12 h). The antimicrobial activity of the conjugates depended on the DS. At DS 8%, the minimum inhibitory concentration (MIC) of the conjugate was equal to the MIC of native CT (1 µg/mL); at DS of 3 and 5%, the MIC increased 8-fold. In addition, the developed systems reduced CT nephrotoxicity by 20-60%; they also demonstrated the ability to reduce bacterial lipopolysaccharide-induced inflammation in vitro. Thus, these promising CT-SucCS conjugates are prospective for developing safe and effective nanoantibiotics.
Collapse
Affiliation(s)
- Natallia V. Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
| | - Anton N. Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
| | - Anatoliy V. Dobrodumov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
| | - Igor V. Kudryavtsev
- Institute of Experimental Medicine, Akademika Pavlova 12, 197376 St. Petersburg, Russia
| | - Andrey S. Trulioff
- Institute of Experimental Medicine, Akademika Pavlova 12, 197376 St. Petersburg, Russia
| | - Artem A. Rubinstein
- Institute of Experimental Medicine, Akademika Pavlova 12, 197376 St. Petersburg, Russia
| | - Arthur D. Aquino
- Almazov National Medical Research Centre, Akkuratova 2, 197341 St. Petersburg, Russia
| | | | - Elena S. Knyazeva
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, 197110 St Petersburg, Russia
| | - Elena V. Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, 197110 St Petersburg, Russia
| | - Yuliya A. Nashchekina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky 4, 194064 St. Petersburg, Russia
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, 199004 St. Petersburg, Russia
- Correspondence:
| |
Collapse
|
7
|
Dubashynskaya NV, Bokatyi AN, Gasilova ER, Dobrodumov AV, Dubrovskii YA, Knyazeva ES, Nashchekina YA, Demyanova EV, Skorik YA. Hyaluronan-colistin conjugates: Synthesis, characterization, and prospects for medical applications. Int J Biol Macromol 2022; 215:243-252. [PMID: 35724903 DOI: 10.1016/j.ijbiomac.2022.06.080] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/31/2022] [Accepted: 06/11/2022] [Indexed: 11/29/2022]
Abstract
The development of nanotechnology-based antibiotic delivery systems (nanoantibiotics) is an important challenge in the effort to combat microbial multidrug resistance. These systems have improved biopharmaceutical characteristics by increasing local bioavailability and reducing systemic toxicity and the number and frequency of drug side effects. Conjugation of low -molecular -weight antibacterial agents with natural polysaccharides is an effective strategy for developing optimal targeted delivery systems with programmed release and reduced cytotoxicity. This study describes the synthesis of conjugates of colistin (CT) and hyaluronic acid (HA) using carbodiimide chemistry to conjugate the amino groups of CT with the carboxyl groups of HA. The obtained polysaccharide carriers had a degree of substitution (DS) with CT molecules of 3-10 %, and the CT content was 129-377 μg/mg. The size of the fabricated particles was 300-600 nm; in addition, there were conjugates in the form of single macromolecules (30-50 nm). The ζ-potential of developed systems was about -20 mV. In vitro release studies at pH 7.4 and pH 5.2 showed slow hydrolysis of amide bonds, with a CT release of 1-5 % after 24 h. The conjugates retained antimicrobial activity depending on the DS: at DS 8 %, the minimum inhibitory concentration (MIC) of the conjugate corresponded to the MIC of free CT. The resulting systems also reduced CT nephrotoxicity by 20-50 %. These new conjugates of CT with HA are promising for the development of nanodrugs for safe and effective antimicrobial therapy.
Collapse
Affiliation(s)
- Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Anton N Bokatyi
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation; Institute of Chemistry, St. Petersburg State University, Universitetskii 26, St. Petersburg, Petrodvorets, 198504, Russian Federation
| | - Ekaterina R Gasilova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Anatoliy V Dobrodumov
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Yaroslav A Dubrovskii
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Elena S Knyazeva
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russian Federation
| | - Yuliya A Nashchekina
- Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky 4, St. Petersburg 194064, Russian Federation
| | - Elena V Demyanova
- State Research Institute of Highly Pure Biopreparations, Pudozhsakya 7, St Petersburg 197110, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation.
| |
Collapse
|
8
|
Tachihara Y, Nakagawa Y, Miyazaki T, Anraku Y, Cabral H. Mechanically interlocked molecular architectures of valinomycin as cancer targeted prodrugs. NANO SELECT 2022. [DOI: 10.1002/nano.202100368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Yoshihiro Tachihara
- Department of Bioengineering School of Engineering The University of Tokyo Bunkyo‐ku Tokyo Japan
| | - Yasuhiro Nakagawa
- Department of Materials Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology Tokyo Japan
| | - Takuya Miyazaki
- Kanagawa Institute of Industrial Science and Technology (KISTEC) Ebina Kanagawa Japan
| | - Yasutaka Anraku
- Department of Bioengineering School of Engineering The University of Tokyo Bunkyo‐ku Tokyo Japan
| | - Horacio Cabral
- Department of Bioengineering School of Engineering The University of Tokyo Bunkyo‐ku Tokyo Japan
| |
Collapse
|
9
|
Antibiotic-loaded lipid-based nanocarrier: a promising strategy to overcome bacterial infection. Int J Pharm 2022; 621:121782. [PMID: 35489605 DOI: 10.1016/j.ijpharm.2022.121782] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/11/2022] [Accepted: 04/25/2022] [Indexed: 12/18/2022]
Abstract
According to the World Health Organization (WHO) and Centers for Disease Control and Prevention (CDC), bacterial infections are one of the greatest threats to global health, food production, and life expectancy. In this sense, the development of innovative formulations aiming at greater therapeutic efficacy, safety, and shorter treatment duration compared to conventional products is urgently needed. Lipid-based nanocarriers (LBNs) have demonstrated the potential to enhance the effectiveness of available antibiotics. Among them, liposome, nanoemulsion, solid lipid nanoparticle (SLN), and nanostructured lipid carrier (NLC) are the most promising due to their solid technical background for laboratory and industrial production. This review describes recent advances in developing antibiotic-loaded LBNs against susceptible and resistant bacterial strains and biofilm. LBNs revealed to be a promising alternative to deliver antibiotics due to their superior characteristics compared to conventional preparations, including their modified drug release, improved bioavailability, drug protection against chemical or enzymatic degradation, greater drug loading capacity, and biocompatibility. Antibiotic-loaded LBNs can improve current clinical drug therapy, bring innovative products and rescue discarded antibiotics. Thus, antibiotic-loaded LBNs have potential to open a window of opportunities to continue saving millions of lives and prevent the devastating impact of bacterial infection.
Collapse
|
10
|
Zhou Y, Petrova SP, Edgar KJ. Chemical synthesis of polysaccharide-protein and polysaccharide-peptide conjugates: A review. Carbohydr Polym 2021; 274:118662. [PMID: 34702481 DOI: 10.1016/j.carbpol.2021.118662] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/22/2021] [Accepted: 09/07/2021] [Indexed: 12/11/2022]
Abstract
Polysaccharides are abundant natural polymers, which in nature are at times covalently modified with peptides and proteins. Polysaccharide-protein or polysaccharide-peptide conjugates, natural or otherwise, may have increased solubility, improved emulsion properties, prolonged circulation time, reduced immunogenicity, and enhanced selectivity for targeting specific tissues compared to native peptides and proteins. In this paper, we will review recent advances in synthetic methods for producing polysaccharide-protein conjugates and discuss their advantages with a focus on drug targeting.
Collapse
Affiliation(s)
- Yang Zhou
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA 24061, United States
| | - Stella P Petrova
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, United States
| | - Kevin J Edgar
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA 24061, United States; Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, United States.
| |
Collapse
|
11
|
Zhang W, Hu E, Wang Y, Miao S, Liu Y, Hu Y, Liu J, Xu B, Chen D, Shen Y. Emerging Antibacterial Strategies with Application of Targeting Drug Delivery System and Combined Treatment. Int J Nanomedicine 2021; 16:6141-6156. [PMID: 34511911 PMCID: PMC8423451 DOI: 10.2147/ijn.s311248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 08/17/2021] [Indexed: 01/12/2023] Open
Abstract
At present, some bacteria have developed significant resistance to almost all available antibiotics. One of the reasons that cannot be ignored is long-term exposure of bacteria to the sub-minimum inhibitory concentration (MIC) of antibiotics. Therefore, it is necessary to develop a targeted antibiotic delivery system to improve drug delivery behavior, in order to delay the generation of bacterial drug resistance. In recent years, with the continuous development of nanotechnology, various types of nanocarriers that respond to the infection microenvironment, targeting specific bacterial targets, and targeting infected cells, and so on, are gradually being used in the delivery of antibacterial agents to increase the concentration of drugs at the site of infection and reduce the side effects of drugs in normal tissues. Here, this article describes in detail the latest research progress on nanocarriers for antimicrobial, and commonly used targeted antimicrobial strategies. The advantages of the combination of nanotechnology and targeting strategies in combating bacterial infections are highlighted in this review, and the upcoming opportunities and remaining challenges in this field are rationally prospected.
Collapse
Affiliation(s)
- Wenli Zhang
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Enshi Hu
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Yajie Wang
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Si Miao
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Yanyan Liu
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Yumin Hu
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Ji Liu
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Bohui Xu
- School of Pharmacy, Nantong University, Nantong, 226001, People's Republic of China
| | - Daquan Chen
- School of Pharmacy, Yantai University, State Key Laboratory of Long-acting and Targeting Drug Delivery System, Yantai, 264005, People's Republic of China
| | - Yan Shen
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| |
Collapse
|
12
|
Tegge W, Guerra G, Höltke A, Schiller L, Beutling U, Harmrolfs K, Gröbe L, Wullenkord H, Xu C, Weich H, Brönstrup M. Selective Bacterial Targeting and Infection-Triggered Release of Antibiotic Colistin Conjugates. Angew Chem Int Ed Engl 2021; 60:17989-17997. [PMID: 34097810 PMCID: PMC8456958 DOI: 10.1002/anie.202104921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/28/2021] [Indexed: 12/18/2022]
Abstract
In order to render potent, but toxic antibiotics more selective, we have explored a novel conjugation strategy that includes drug accumulation followed by infection-triggered release of the drug. Bacterial targeting was achieved using a modified fragment of the human antimicrobial peptide ubiquicidin, as demonstrated by fluorophore-tagged variants. To limit the release of the effector colistin only to infection-related situations, we introduced a linker that was cleaved by neutrophil elastase (NE), an enzyme secreted by neutrophil granulocytes at infection sites. The linker carried an optimized sequence of amino acids that was required to assure sufficient cleavage efficiency. The antibacterial activity of five regioisomeric conjugates prepared by total synthesis was masked, but was released upon exposure to recombinant NE when the linker was attached to amino acids at the 1- or the 3-position of colistin. A proof-of-concept was achieved in co-cultures of primary human neutrophils and Escherichia coli that induced the secretion of NE, the release of free colistin, and an antibacterial efficacy that was equal to that of free colistin.
Collapse
Affiliation(s)
- Werner Tegge
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Giulia Guerra
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Alexander Höltke
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Lauritz Schiller
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Ulrike Beutling
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Kirsten Harmrolfs
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Lothar Gröbe
- Flow Cytometry and Cell Sorting PlatformHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Hannah Wullenkord
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Chunfa Xu
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Herbert Weich
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Mark Brönstrup
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
- German Center for Infection Research (DZIF), SiteHannover-BraunschweigGermany
- Center of Biomolecular Drug Research (BMWZ)Leibniz Universität30167HannoverGermany
| |
Collapse
|
13
|
Tegge W, Guerra G, Höltke A, Schiller L, Beutling U, Harmrolfs K, Gröbe L, Wullenkord H, Xu C, Weich H, Brönstrup M. Zielgerichtete bakterielle Lokalisation und infektionsinduzierte Freisetzung von antibiotischen Colistin‐Konjugaten. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Werner Tegge
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Giulia Guerra
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Alexander Höltke
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Lauritz Schiller
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Ulrike Beutling
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Kirsten Harmrolfs
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Lothar Gröbe
- Flow Cytometry and Cell Sorting Platform Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Hannah Wullenkord
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Chunfa Xu
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Herbert Weich
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Mark Brönstrup
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
- Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig Deutschland
- Biomolekulares Wirkstoffzentrum (BMWZ) Leibniz Universität 30167 Hannover Deutschland
| |
Collapse
|
14
|
Askari P, Namaei MH, Ghazvini K, Hosseini M. In vitro and in vivo toxicity and antibacterial efficacy of melittin against clinical extensively drug-resistant bacteria. BMC Pharmacol Toxicol 2021; 22:42. [PMID: 34261542 PMCID: PMC8281584 DOI: 10.1186/s40360-021-00503-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 05/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Melittin is one of the most studied antimicrobial peptides, and several in vitro experiments have demonstrated its antibacterial efficacy. However, there is evidence showing melittin has non-promising effects such as cytotoxicity and hemolysis. Therefore, concerns about unwanted collateral toxicity of melittin lie ahead in the path toward its clinical development. With these considerations, the present study aimed to fill the gap between in vitro and in vivo studies. METHODS In the first step, in vitro toxicity profile of melittin was assessed using cytotoxicity and hemolysis tests. Next, a maximum intraperitoneal (i.p.) sub-lethal dose was determined using BALB/c mice. Besides toxicity, antimicrobial efficacy of melittin against extensively drug-resistant (XDR) Acinetobacter baumannii, methicillin-resistant Staphylococcus aureus (MRSA), and KPC-producing Klebsiella pneumonia (KPC-KP) pathogens were tested using both in vitro and in vivo methods. RESULTS Melittin showed extensive hemolysis (HD50 = 0.44 µg/mL), and cytotoxicity (IC50 = 6.45 µg/mL) activities with i.p. LD50 value of 4.98 mg/kg in BALB/c mice. In vitro antimicrobial evaluation showed melittin MIC range from 8 to 32 µg/mL for the studied pathogens. Treatment of infected mice with repeated sub-lethal doses of melittin (2.4 mg/kg) displayed no beneficial effect on their survival and peritoneal bacterial loads. CONCLUSIONS These results indicate that melittin at its safe dose could not exhibit antimicrobial activity, which hinders its application in clinical practice.
Collapse
Affiliation(s)
- Parvin Askari
- Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Hasan Namaei
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Mashhad, Iran
| | - Kiarash Ghazvini
- Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Mehran Hosseini
- Department of Anatomical Sciences, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran.
| |
Collapse
|
15
|
Blackman LD, Qu Y, Cass P, Locock KES. Approaches for the inhibition and elimination of microbial biofilms using macromolecular agents. Chem Soc Rev 2021; 50:1587-1616. [PMID: 33403373 DOI: 10.1039/d0cs00986e] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Biofilms are complex three-dimensional structures formed at interfaces by the vast majority of bacteria and fungi. These robust communities have an important detrimental impact on a wide range of industries and other facets of our daily lives, yet their removal is challenging owing to the high tolerance of biofilms towards conventional antimicrobial agents. This key issue has driven an urgent search for new innovative antibiofilm materials. Amongst these emerging approaches are highly promising materials that employ aqueous-soluble macromolecules, including peptides, proteins, synthetic polymers, and nanomaterials thereof, which exhibit a range of functionalities that can inhibit biofilm formation or detach and destroy organisms residing within established biofilms. In this Review, we outline the progress made in inhibiting and removing biofilms using macromolecular approaches, including a spotlight on cutting-edge materials that respond to environmental stimuli for "on-demand" antibiofilm activity, as well as synergistic multi-action antibiofilm materials. We also highlight materials that imitate and harness naturally derived species to achieve new and improved biomimetic and biohybrid antibiofilm materials. Finally, we share some speculative insights into possible future directions for this exciting and highly significant field of research.
Collapse
Affiliation(s)
- Lewis D Blackman
- CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia.
| | - Yue Qu
- Infection and Immunity Program, Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia and Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC 3004, Australia
| | - Peter Cass
- CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia.
| | | |
Collapse
|
16
|
Chiron E, Varache M, Stokniene J, Thomas DW, Ferguson EL. A physicochemical assessment of the thermal stability of dextrin-colistin conjugates. Sci Rep 2021; 11:10600. [PMID: 34011987 PMCID: PMC8134461 DOI: 10.1038/s41598-021-89946-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/04/2021] [Indexed: 11/25/2022] Open
Abstract
Attachment of polysaccharide carriers is increasingly being used to achieve precision delivery and improved effectiveness of protein and peptide drugs. Although it is clear that their clinical effectiveness relies on the purity and integrity of the conjugate in storage, as well as following administration, instability of polysaccharide-based conjugates can reduce the protective efficacy of the polymer, which may adversely affect the bioactive's potency. As a model, these studies used dextrin-colistin conjugates, with varying degrees of polymer modification (1, 2.5 and 7.5 mol% succinoylation) to assess the effect of storage temperature (- 20, 4, 21 and 37 °C) and duration (up to 12 months) on saccharide and colistin release and antimicrobial activity. Estimation of the proportion of saccharide release (by comparison of area under the curve from size exclusion chromatograms) was more pronounced at higher temperatures (up to 3 and 35% at - 20 °C and 37 °C, respectively after 12 months), however, repeated freeze-thaw did not produce any measurable release of saccharides, while addition of amylase (20, 100, 500 IU/L) caused rapid release of saccharides (> 70% total within 24 h). At all temperatures, conjugates containing the lowest degree of succinoylation released the highest proportion of free colistin, which increased with storage temperature, however no trend in saccharide release was observed. Despite the clear physical effects of prolonged storage, antimicrobial activity of all samples was only altered after storage at 37 °C for 12 months (> threefold decreased activity). These results demonstrate significant release of saccharides from dextrin-colistin conjugates during prolonged storage in buffered solution, especially at elevated temperature, which, in most cases, did not affect antimicrobial activity. These findings provide vital information about the structure-activity relationship of dextrin-colistin conjugates, prior to full-scale commercial development, which can subsequently be applied to other polysaccharide-protein and -peptide conjugates.
Collapse
Affiliation(s)
- Emilie Chiron
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
| | - Mathieu Varache
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
- CNRS, Ingénierie Des Matériaux Polymères, IMP UMR CNRS 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 bd A. Latarjet, 69622, Villeurbanne, France
| | - Joana Stokniene
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
| | - David W Thomas
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
| | - Elaine L Ferguson
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK.
| |
Collapse
|
17
|
Yang X, Ren H, Zhang H, Liu G, Jiang Z, Qiu Q, Yu C, Murthy N, Zhao K, Lovell JF, Zhang Y. Antibiotic Cross-linked Micelles with Reduced Toxicity for Multidrug-Resistant Bacterial Sepsis Treatment. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9630-9642. [PMID: 33616382 DOI: 10.1021/acsami.0c21459] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
One potential approach to address the rising threat of antibiotic resistance is through novel formulations of established drugs. We designed antibiotic cross-linked micelles (ABC-micelles) by cross-linking the Pluronic F127 block copolymers with an antibiotic itself, via a novel one-pot synthesis in aqueous solution. ABC-micelles enhanced antibiotic encapsulation while also reducing systemic toxicity in mice. Using colistin, a hydrophilic, potent ″last-resort" antibiotic, ABC-micelle encapsulation yield was 80%, with good storage stability. ABC-micelles exhibited an improved safety profile, with a maximum tolerated dose of over 100 mg/kg colistin in mice, at least 16 times higher than the free drug. Colistin-induced nephrotoxicity and neurotoxicity were reduced in ABC-micelles by 10-50-fold. Despite reduced toxicity, ABC-micelles preserved bactericidal activity, and the clinically relevant combination of colistin and rifampicin (co-loaded in the micelles) showed a synergistic antimicrobial effect against antibiotic-resistant strains of Escherichia coli, Pseudomonas aeruginosa, and Acinetobacter baumannii. In a mouse model of sepsis, colistin ABC-micelles showed equivalent efficacy as free colistin but with a substantially higher therapeutic index. Microscopic single-cell imaging of bacteria revealed that ABC-micelles could kill bacteria in a more rapid manner with distinct cell membrane disruption, possibly reflecting a different antimicrobial mechanism from free colistin. This work shows the potential of drug cross-linked micelles as a new class of biomaterials formed from existing antibiotics and represents a new and generalized approach for formulating amine-containing drugs.
Collapse
Affiliation(s)
- Xingyue Yang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - He Ren
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Hong Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Gengqi Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Zhen Jiang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Qian Qiu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Cui Yu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Niren Murthy
- Department of Bioengineering, University of California Berkeley, Berkeley, California 94720, United States
| | - Kun Zhao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| | - Jonathan F Lovell
- Department of Biomedical Engineering, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Yumiao Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, P. R. China
| |
Collapse
|
18
|
Bi-Functional Alginate Oligosaccharide-Polymyxin Conjugates for Improved Treatment of Multidrug-Resistant Gram-Negative Bacterial Infections. Pharmaceutics 2020; 12:pharmaceutics12111080. [PMID: 33187332 PMCID: PMC7696216 DOI: 10.3390/pharmaceutics12111080] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 02/06/2023] Open
Abstract
The recent emergence of resistance to colistin, an antibiotic of last resort with dose-limiting toxicity, has highlighted the need for alternative approaches to combat infection. This study aimed to generate and characterise alginate oligosaccharide (“OligoG”)–polymyxin (polymyxin B and E (colistin)) conjugates to improve the effectiveness of these antibiotics. OligoG–polymyxin conjugates (amide- or ester-linked), with molecular weights of 5200–12,800 g/mol and antibiotic loading of 6.1–12.9% w/w, were reproducibly synthesised. In vitro inflammatory cytokine production (tumour necrosis factor alpha (TNFα) ELISA) and cytotoxicity (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) of colistin (2.2–9.3-fold) and polymyxin B (2.9–27.2-fold) were significantly decreased by OligoG conjugation. Antimicrobial susceptibility tests (minimum inhibitory concentration (MIC), growth curves) demonstrated similar antimicrobial efficacy of ester- and amide-linked conjugates to that of the parent antibiotic but with more sustained inhibition of bacterial growth. OligoG–polymyxin conjugates exhibited improved selectivity for Gram-negative bacteria in comparison to mammalian cells (approximately 2–4-fold). Both OligoG–colistin conjugates caused significant disruption of Pseudomonas aeruginosa biofilm formation and induced bacterial death (confocal laser scanning microscopy). When conjugates were tested in an in vitro “time-to-kill” (TTK) model using Acinetobacter baumannii, only ester-linked conjugates reduced viable bacterial counts (~2-fold) after 4 h. Bi-functional OligoG–polymyxin conjugates have potential therapeutic benefits in the treatment of multidrug-resistant (MDR) Gram-negative bacterial infections, directly reducing toxicity whilst retaining antimicrobial and antibiofilm activities.
Collapse
|
19
|
Dubashynskaya NV, Skorik YA. Polymyxin Delivery Systems: Recent Advances and Challenges. Pharmaceuticals (Basel) 2020; 13:E83. [PMID: 32365637 PMCID: PMC7281078 DOI: 10.3390/ph13050083] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 02/07/2023] Open
Abstract
Polymyxins are vital antibiotics for the treatment of multiresistant Gram-negative ESKAPE pathogen infections. However, their clinical value is limited by their high nephrotoxicity and neurotoxicity, as well as their poor permeability and absorption in the gastrointestinal tract. This review focuses on various polymyxin delivery systems that improve polymyxin bioavailability and reduce drug toxicity through targeted and controlled release. Currently, the most suitable systems for improving oral, inhalation, and parenteral polymyxin delivery are polymer particles, liposomes, and conjugates, while gels, polymer fibers, and membranes are attractive materials for topical administration of polymyxin for the treatment of infected wounds and burns. In general, the application of these systems protects polymyxin molecules from the negative effects of both physiological and pathological factors while achieving higher concentrations at the target site and reducing dosage and toxicity. Improving the properties of polymyxin will be of great interest to researchers who are focused on developing antimicrobial drugs that show increased efficacy and safety.
Collapse
Affiliation(s)
| | - Yury A. Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St. Petersburg 199004, Russia;
| |
Collapse
|
20
|
Madhumanchi S, Suedee R, Nakpheng T, Tinpun K, Temboot P, Srichana T. Binding interactions of bacterial lipopolysaccharides to polymyxin B in an amphiphilic carrier 'sodium deoxycholate sulfate'. Colloids Surf B Biointerfaces 2019; 182:110374. [PMID: 31330430 DOI: 10.1016/j.colsurfb.2019.110374] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 12/19/2022]
Abstract
This work presents the outcomes of a comparative study of molecular interactions of polymyxin B (PMB) and F12 and F13 formulations in the mole ratios of 1:2 and 1:3 of PMB:sodium deoxycholate sulfate (SDCS), respectively, and a commercial PMB formulation (CPMB) with lipopolysaccharides (LPS). Several spectroscopic and interfacial studies were performed to obtain LPS-peptide interactions at a molecular level. The fluorescence titrimetry method revealed that the F12 formulation (325 nM) exhibited a lower number of binding sites to the LPS compared to CPMB and F13 as well as PMB alone (537 nM). Similarly, in the presence of LPS, the F12 formulation (88 nm) exhibited smaller particle sizes in the dynamic light scattering study compared to PMB (116 nm), CPMB, and the F13 formulation. An interfacial study and circular dichroism spectroscopy revealed PMB and CPMB insertion into the LPS micelles to destabilize and disrupt the LPS membrane, whereas the F12 and F13 formulations may induce pseudo-aggregation. The NMR and IR studies showed that the presence of SDCS, the hydrophobicity of PMB increased by hydrogen bonding and electrostatic interactions and formed stabilized PMB-SDCS micelles. The PMB-SDCS formulation is likely to release PMB for easy penetration into the lipid membrane and cause disruption of the complex LPS micelles. Furthermore, the PMB-SDCS formulations neutralized and detoxified the LPS micelles with minimal toxicity to normal kidney tubular cells as well as an immortalised kidney cell line. The antimicrobial properties of PMBloaded SDCS nanomicelles were effective against a resistant strain of Pseudomonas aeruginosa.
Collapse
Affiliation(s)
- Sreenu Madhumanchi
- Drug Delivery System Excellence Center, Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Molecular Recognition Materials Research Unit, Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Roongnapa Suedee
- Molecular Recognition Materials Research Unit, Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Titpawan Nakpheng
- Drug Delivery System Excellence Center, Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Kittiya Tinpun
- Drug Delivery System Excellence Center, Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Pornvichai Temboot
- Drug Delivery System Excellence Center, Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Teerapol Srichana
- Drug Delivery System Excellence Center, Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
| |
Collapse
|
21
|
Varache M, Powell LC, Aarstad OA, Williams TL, Wenzel MN, Thomas DW, Ferguson EL. Polymer Masked-Unmasked Protein Therapy: Identification of the Active Species after Amylase Activation of Dextrin-Colistin Conjugates. Mol Pharm 2019; 16:3199-3207. [PMID: 31125239 PMCID: PMC6779022 DOI: 10.1021/acs.molpharmaceut.9b00393] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
![]()
Polymer
masked–unmasked protein therapy (PUMPT) uses conjugation
of a biodegradable polymer, such as dextrin, hyaluronic acid, or poly(l-glutamic acid), to mask a protein or peptide’s activity;
subsequent locally triggered degradation of the polymer at the target
site regenerates bioactivity in a controllable fashion. Although the
concept of PUMPT is well established, the relationship between protein
unmasking and reinstatement of bioactivity is unclear. Here, we used
dextrin–colistin conjugates to study the relationship between
the molecular structure (degree of unmasking) and biological activity.
Size exclusion chromatography was employed to collect fractions of
differentially degraded conjugates and ultraperformance liquid chromatography–mass
spectrometry (UPLC–MS) employed to characterize the corresponding
structures. Antimicrobial activity was studied using a minimum inhibitory
concentration (MIC) assay and confocal laser scanning microscopy of
LIVE/DEAD-stained biofilms with COMSTAT analysis. In vitro toxicity
of the degraded conjugate was assessed using an 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl
tetrazolium bromide assay. UPLC–MS revealed that the fully
“unmasked” dextrin–colistin conjugate composed
of colistin bound to at least one linker, whereas larger species were
composed of colistin with varying lengths of glucose units attached.
Increasing the degree of dextrin modification by succinoylation typically
led to a greater number of linkers bound to colistin. Greater antimicrobial
and antibiofilm activity were observed for the fully “unmasked”
conjugate compared to the partially degraded species (MIC = 0.25 and
2–8 μg/mL, respectively), whereas dextrin conjugation
reduced colistin’s in vitro toxicity toward kidney cells, even
after complete unmasking. This study highlights the importance of
defining the structure–antimicrobial activity relationship
for novel antibiotic derivatives and demonstrates the suitability
of LC–MS to aid the design of biodegradable polymer–antibiotic
conjugates.
Collapse
Affiliation(s)
- Mathieu Varache
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences , Cardiff University , Heath Park , Cardiff CF14 4XY , U.K
| | - Lydia C Powell
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences , Cardiff University , Heath Park , Cardiff CF14 4XY , U.K
| | - Olav A Aarstad
- Department of Biotechnology and Food Sciences , Norwegian University of Science and Technology , Trondheim 7491 , Norway
| | - Thomas L Williams
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Margot N Wenzel
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - David W Thomas
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences , Cardiff University , Heath Park , Cardiff CF14 4XY , U.K
| | - Elaine L Ferguson
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences , Cardiff University , Heath Park , Cardiff CF14 4XY , U.K
| |
Collapse
|
22
|
Mukherjee I, Ghosh A, Bhadury P, De P. Matrix-Assisted Regulation of Antimicrobial Properties: Mechanistic Elucidation with Ciprofloxacin-Based Polymeric Hydrogel Against Vibrio Species. Bioconjug Chem 2018; 30:218-230. [DOI: 10.1021/acs.bioconjchem.8b00846] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
23
|
Ferguson EL, Naseer S, Powell LC, Hardwicke J, Young FI, Zhu B, Liu Q, Song B, Thomas DW. Controlled release of dextrin-conjugated growth factors to support growth and differentiation of neural stem cells. Stem Cell Res 2018; 33:69-78. [PMID: 30321831 PMCID: PMC6288241 DOI: 10.1016/j.scr.2018.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 09/06/2018] [Accepted: 10/03/2018] [Indexed: 12/16/2022] Open
Abstract
An essential aspect of stem cell in vitro culture and in vivo therapy is achieving sustained levels of growth factors to support stem cell survival and expansion, while maintaining their multipotency and differentiation potential. This study investigated the ability of dextrin (~74,000 g/mol; 27.8 mol% succinoylation) conjugated to epidermal growth factor (EGF) and basic fibroblast growth factor (bFGF; or FGF-2) (3.9 and 6.7% w/w protein loading, respectively) to support the expansion and differentiation of stem cells in vitro via sustained, controllable growth factor release. Supplementation of mouse neural stem cells (mNSCs) with dextrin-growth factor conjugates led to greater and prolonged proliferation compared to unbound EGF/bFGF controls, with no detectable apoptosis after 7 days of treatment. Immunocytochemical detection of neural precursor (nestin) and differentiation (Olig2, MAP2, GFAP) markers verified that controlled release of dextrin-conjugated growth factors preserves stem cell properties of mNSCs for up to 7 days. These results show the potential of dextrin-growth factor conjugates for localized delivery of bioactive therapeutic agents to support stem cell expansion and differentiation, and as an adjunct to direct neuronal repair.
Collapse
Affiliation(s)
- Elaine L Ferguson
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; Cardiff Institute of Tissue Engineering and Repair, Cardiff University, 10 Museum Place, Cardiff, South Glamorgan, CF10 3BG, UK.
| | - Sameza Naseer
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK
| | - Lydia C Powell
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; Cardiff Institute of Tissue Engineering and Repair, Cardiff University, 10 Museum Place, Cardiff, South Glamorgan, CF10 3BG, UK
| | - Joseph Hardwicke
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; Cardiff Institute of Tissue Engineering and Repair, Cardiff University, 10 Museum Place, Cardiff, South Glamorgan, CF10 3BG, UK
| | - Fraser I Young
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; Cardiff Institute of Tissue Engineering and Repair, Cardiff University, 10 Museum Place, Cardiff, South Glamorgan, CF10 3BG, UK
| | - Bangfu Zhu
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK
| | - Qian Liu
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK
| | - Bing Song
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; Cardiff Institute of Tissue Engineering and Repair, Cardiff University, 10 Museum Place, Cardiff, South Glamorgan, CF10 3BG, UK
| | - David W Thomas
- Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; Cardiff Institute of Tissue Engineering and Repair, Cardiff University, 10 Museum Place, Cardiff, South Glamorgan, CF10 3BG, UK
| |
Collapse
|
24
|
|
25
|
Bahamondez-Canas TF, Zhang H, Tewes F, Leal J, Smyth HDC. PEGylation of Tobramycin Improves Mucus Penetration and Antimicrobial Activity against Pseudomonas aeruginosa Biofilms in Vitro. Mol Pharm 2018. [PMID: 29514003 DOI: 10.1021/acs.molpharmaceut.8b00011] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Pseudomonas aeruginosa is the predominant pathogen in the persistent lung infections of cystic fibrosis (CF) patients among other diseases. One of the mechanisms of resistance of P. aeruginosa infections is the formation and presence of biofilms. Previously, we demonstrated that PEGylated-tobramycin (Tob-PEG) had superior antimicrobial activity against P. aeruginosa biofilms compared to tobramycin (Tob). The goal of this study was to optimize the method of PEGylation of Tob and assess its activity in an in vitro CF-like mucus barrier biofilm model. Tob was PEGylated using three separate chemical conjugation methods and analyzed by 1H NMR. A comparison of the Tob-PEG products from the different conjugation methods showed significant differences in the reduction of biofilm proliferation after 24 h of treatment. In the CF-like mucus barrier model, Tob-PEG was significantly better than Tob in reducing P. aeruginosa proliferation after only 5 h of treatment ( p < 0.01). Finally, Tob-PEG caused a reduction in the number of surviving P. aeruginosa biofilm colonies higher than that of Tob ( p < 0.0001). We demonstrate the significantly improved antimicrobial activity of Tob-PEG against P. aeruginosa biofilms compared to Tob using two PEGylation methods. Tob-PEG had better in vitro activity compared to that of Tob against P. aeruginosa biofilms growing in a CF-like mucus barrier model.
Collapse
Affiliation(s)
- Tania F Bahamondez-Canas
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Hairui Zhang
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Frederic Tewes
- INSERM, U1070, UFR de Médecine Pharmacie , Université de Poitiers , 86073 Poitiers Cedex 9 , France
| | - Jasmim Leal
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Hugh D C Smyth
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy , The University of Texas at Austin , Austin , Texas 78712 , United States.,Center for Infectious Disease , The University of Texas at Austin , Austin , Texas 78712 , United States
| |
Collapse
|
26
|
Burn injury: Challenges and advances in burn wound healing, infection, pain and scarring. Adv Drug Deliv Rev 2018; 123:3-17. [PMID: 28941987 DOI: 10.1016/j.addr.2017.09.018] [Citation(s) in RCA: 304] [Impact Index Per Article: 50.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/15/2017] [Accepted: 09/18/2017] [Indexed: 12/18/2022]
Abstract
Severe burn injuries are the most traumatic and physically debilitating injuries affecting nearly every organ system and leading to significant morbidity and mortality. Early burn wound excision and skin grafting are common clinical practices that have significantly improved the outcomes for severe burn injured patients by reducing mortality rate and days of hospital stay. However, slow wound healing, infection, pain, and hypertrophic scarring continue to remain a major challenge in burn research and management. In the present article, we review and discuss issues in the current treatment of burn injuries; the advances and novel strategies developed in the past decade that have improved burn management; and also, pioneer ideas and studies in burn research which aims to enhance burn wound care with a focus on burn wound infection, pain management, treatments for scarring and skin tissue engineering.
Collapse
|
27
|
Parisi OI, Scrivano L, Sinicropi MS, Puoci F. Polymeric nanoparticle constructs as devices for antibacterial therapy. Curr Opin Pharmacol 2017; 36:72-77. [DOI: 10.1016/j.coph.2017.08.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/28/2017] [Accepted: 08/04/2017] [Indexed: 12/15/2022]
|
28
|
Koh JJ, Lin S, Beuerman RW, Liu S. Recent advances in synthetic lipopeptides as anti-microbial agents: designs and synthetic approaches. Amino Acids 2017; 49:1653-1677. [PMID: 28823054 DOI: 10.1007/s00726-017-2476-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 07/31/2017] [Indexed: 12/31/2022]
Abstract
Infectious diseases impose serious public health burdens and continue to be a global public health crisis. The treatment of infections caused by multidrug-resistant pathogens is challenging because only a few viable therapeutic options are clinically available. The emergence and risk of drug-resistant superbugs and the dearth of new classes of antibiotics have drawn increasing awareness that we may return to the pre-antibiotic era. To date, lipopeptides have been received considerable attention because of the following properties: They exhibit potent antimicrobial activities against a broad spectrum of pathogens, rapid bactericidal activity and have a different antimicrobial action compared with most of the conventional antibiotics used today and very slow development of drug resistance tendency. In general, lipopeptides can be structurally classified into two parts: a hydrophilic peptide moiety and a hydrophobic fatty acyl chain. To date, a significant amount of design and synthesis of lipopeptides have been done to improve the therapeutic potential of lipopeptides. This review will present the current knowledge and the recent research in design and synthesis of new lipopeptides and their derivatives in the last 5 years.
Collapse
Affiliation(s)
- Jun-Jie Koh
- Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower Level 6, Singapore, 169856, Singapore
| | - Shuimu Lin
- Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower Level 6, Singapore, 169856, Singapore
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Roger W Beuerman
- Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower Level 6, Singapore, 169856, Singapore.
- SRP Neuroscience and Behavioral Disorders, Duke-NUS Medical School, Singapore, 169857, Singapore.
| | - Shouping Liu
- Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower Level 6, Singapore, 169856, Singapore.
- SRP Neuroscience and Behavioral Disorders, Duke-NUS Medical School, Singapore, 169857, Singapore.
| |
Collapse
|
29
|
Azzopardi E, Lloyd C, Teixeira SR, Conlan RS, Whitaker IS. Clinical applications of amylase: Novel perspectives. Surgery 2016; 160:26-37. [PMID: 27117578 DOI: 10.1016/j.surg.2016.01.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 12/20/2015] [Accepted: 01/08/2016] [Indexed: 12/13/2022]
Abstract
BACKGROUND Amylase was the first enzyme to be characterized, and for the previous 200 years, its clinical role has been restricted to a diagnostic aid. Recent interface research has led to a substantial expansion of its role into novel, viable diagnostic, and therapeutic applications to cancer, infection, and wound healing. This review provides a concise "state-of-the-art" overview of the genetics, structure, distribution, and localization of amylase in humans. METHOD A first-generation literature search was performed with the MeSH search string "Amylase AND (diagnost∗ OR therapeut$)" on OVIDSP and PUBMED platforms. A second-generation search was then performed by forward and backward referencing on Web of Knowledge™ and manual indexing, limited to the English Language. RESULTS "State of the Art" in amylase genetics, structure, function distribution, localisation and detection of amylase in humans is provided. To the 4 classic patterns of hyperamylasemia (pancreatic, salivary, macroamylasemia, and combinations) a fifth, the localized targeting of amylase to specific foci of infection, is proposed. CONCLUSIONS The implications are directed at novel therapeutic and diagnostic clinical applications of amylase such as the novel therapeutic drug classes capable of targeted delivery and "smart release" in areas of clinical need. Future directions of research in areas of high clinical benefit are reported.
Collapse
Affiliation(s)
- Ernest Azzopardi
- Reconstructive Surgery and Regenerative Medicine Group, Swansea University, Swansea, United Kingdom; Centre for Nanohealth, Swansea University, Swansea, United Kingdom; The Welsh Centre for Burns and Plastic Surgery, Morriston Hospital, Swansea, United Kingdom; Swansea University Medical School, Swansea University, Swansea, United Kingdom.
| | - Catherine Lloyd
- Reconstructive Surgery and Regenerative Medicine Group, Swansea University, Swansea, United Kingdom; Centre for Nanohealth, Swansea University, Swansea, United Kingdom
| | | | - R Steven Conlan
- Centre for Nanohealth, Swansea University, Swansea, United Kingdom; Swansea University Medical School, Swansea University, Swansea, United Kingdom
| | - Iain S Whitaker
- Reconstructive Surgery and Regenerative Medicine Group, Swansea University, Swansea, United Kingdom; The Welsh Centre for Burns and Plastic Surgery, Morriston Hospital, Swansea, United Kingdom; Swansea University Medical School, Swansea University, Swansea, United Kingdom
| |
Collapse
|
30
|
Roberts JL, Cattoz B, Schweins R, Beck K, Thomas DW, Griffiths PC, Ferguson EL. In Vitro Evaluation of the Interaction of Dextrin–Colistin Conjugates with Bacterial Lipopolysaccharide. J Med Chem 2016; 59:647-54. [DOI: 10.1021/acs.jmedchem.5b01521] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jessica L. Roberts
- Advanced
Therapies Group, School of Dentistry, Cardiff University, Heath Park, Cardiff CF14 4XY, U.K
| | - Beatrice Cattoz
- Department
of Pharmaceutical, Chemical and Environmental Sciences, Faculty of
Engineering and Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime ME4 4TB, U.K
| | - Ralf Schweins
- Institut Laue-Langevin, DS/LSS group, 6, rue Jules Horowitz, 38042 Cedex 9 Grenoble, France
| | - Konrad Beck
- Advanced
Therapies Group, School of Dentistry, Cardiff University, Heath Park, Cardiff CF14 4XY, U.K
| | - David W. Thomas
- Advanced
Therapies Group, School of Dentistry, Cardiff University, Heath Park, Cardiff CF14 4XY, U.K
| | - Peter C. Griffiths
- Department
of Pharmaceutical, Chemical and Environmental Sciences, Faculty of
Engineering and Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime ME4 4TB, U.K
| | - Elaine L. Ferguson
- Advanced
Therapies Group, School of Dentistry, Cardiff University, Heath Park, Cardiff CF14 4XY, U.K
| |
Collapse
|
31
|
Schmidt M, Harmuth S, Barth ER, Wurm E, Fobbe R, Sickmann A, Krumm C, Tiller JC. Conjugation of Ciprofloxacin with Poly(2-oxazoline)s and Polyethylene Glycol via End Groups. Bioconjug Chem 2015; 26:1950-62. [DOI: 10.1021/acs.bioconjchem.5b00393] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin Schmidt
- Biomaterials
and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Simon Harmuth
- Biomaterials
and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Eva Rebecca Barth
- Biomaterials
and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Elena Wurm
- Biomaterials
and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Rita Fobbe
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., Otto Hahn-Straße 6b, 44227 Dortmund, Germany
| | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., Otto Hahn-Straße 6b, 44227 Dortmund, Germany
| | - Christian Krumm
- Biomaterials
and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Joerg C. Tiller
- Biomaterials
and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| |
Collapse
|
32
|
Basu A, Kunduru KR, Abtew E, Domb AJ. Polysaccharide-Based Conjugates for Biomedical Applications. Bioconjug Chem 2015; 26:1396-412. [DOI: 10.1021/acs.bioconjchem.5b00242] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Arijit Basu
- Institute
for Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel 91120
- Department
of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, 835215, India
| | - Konda Reddy Kunduru
- Institute
for Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel 91120
| | - Ester Abtew
- Institute
for Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel 91120
| | - Abraham J. Domb
- Institute
for Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel 91120
| |
Collapse
|
33
|
Development and validation of an in vitro pharmacokinetic/pharmacodynamic model to test the antibacterial efficacy of antibiotic polymer conjugates. Antimicrob Agents Chemother 2014; 59:1837-43. [PMID: 25512401 DOI: 10.1128/aac.03708-14] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
This study describes the use of a novel, two-compartment, static dialysis bag model to study the release, diffusion, and antibacterial activity of a novel, bioresponsive dextrin-colistin polymer conjugate against multidrug resistant (MDR) wild-type Acinetobacter baumannii. In this model, colistin sulfate, at its MIC, produced a rapid and extensive drop in viable bacterial counts (<2 log10 CFU/ml at 4 h); however, a marked recovery was observed thereafter, with regrowth equivalent to that of control by 48 h. In contrast, dextrin-colistin conjugate, at its MIC, suppressed bacterial growth for up to 48 h, with 3 log10 CFU/ml lower bacterial counts after 48 h than those of controls. Doubling the concentration of dextrin-colistin conjugate (to 2× MIC) led to an initial bacterial killing of 3 log10 CFU/ml at 8 h, with a similar regrowth profile to 1× MIC treatment thereafter. The addition of colistin sulfate (1× MIC) to dextrin-colistin conjugate (1× MIC) resulted in undetectable bacterial counts after 4 h, followed by suppressed bacterial growth (3.5 log10 CFU/ml lower than that of control at 48 h). Incubation of dextrin-colistin conjugates with infected wound exudate from a series of burn patients (n = 6) revealed an increasing concentration of unmasked colistin in the outer compartment (OC) over time (up to 86.3% of the initial dose at 48 h), confirming that colistin would be liberated from the conjugate by endogenous α-amylase within the wound environment. These studies confirm the utility of this model system to simulate the pharmacokinetics of colistin formation in humans administered dextrin-colistin conjugates and further supports the development of antibiotic polymer conjugates in the treatment of MDR infections.
Collapse
|