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Azizeh N, Karam A, Heer A, Najlah M, Singer R, Alany RG, Gould SW, Khoder M. Efficient removal of antibiotics from water by highly crosslinked metal-alginate particles: Preparation, isotherms, kinetics, and microbiological assay. Carbohydr Polym 2024; 326:121604. [PMID: 38142071 DOI: 10.1016/j.carbpol.2023.121604] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/02/2023] [Accepted: 11/14/2023] [Indexed: 12/25/2023]
Abstract
Traces of antibiotics reaching aquatic environment lead to the emergence of antimicrobial resistance (AMR). The efficient removal of antibiotics (ATBs) traces from wastewater is essential to tackle the AMR. In this study, a novel solid-state crosslinking method of alginate (ALG) was developed and applied to specifically remove ATBs from water. A wide range of crosslinkers (Ca2+, Zn2+, Cu2+, Ni2+, Fe3+ and Al3+) was used and the crosslinking nature, density, and distribution were evidenced by FTIR, ICP-MS, and SEM-EDS. Compared with ionotropic gelation, the novel solid-state crosslinking method proved superior in term of ease of production, high crosslinking degree, and ATBs removal capacity. Fe-ALG and Zn-ALG showed high removal capacity of ciprofloxacin (356.5 mg/g and 928.6 mg/g) and doxycycline (90 mg/g and 690 mg/g), however, they were less effective toward amoxicillin (11.5 mg/g and 6 mg/g). Removal isotherms and kinetics followed type I and pseudo-second order suggesting a chemisorption removal mechanism. Fe-ALG was successfully regenerated with no loss in ATB removal capacity. The microbiological assay showed significant reductions of antibacterial activities after ATBs removal from water. Overall, metal-ALG systems obtained by solid-state crosslinking are promising for ATBs removal from wastewater giving the ease of production, high efficiency, regenerability, and scalability potential.
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Affiliation(s)
- Nicole Azizeh
- Faculty of Health, Science, Social Care and Education, Kingston University London, Kingston upon Thames KT1 2EE, United Kingdom
| | - Ayman Karam
- Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS, Université de Poitiers/ENSIP, 1 rue Marcel Doré, 86073 Poitiers Cedex, France
| | - Akash Heer
- Faculty of Health, Science, Social Care and Education, Kingston University London, Kingston upon Thames KT1 2EE, United Kingdom
| | - Mohammad Najlah
- Pharmaceutical Research Group, School of Allied Health, Faculty of Health, Education, Medicine and Social Care, Anglia Ruskin University, Chelmsford, UK
| | - Richard Singer
- Faculty of Health, Science, Social Care and Education, Kingston University London, Kingston upon Thames KT1 2EE, United Kingdom
| | - Raid G Alany
- Faculty of Health, Science, Social Care and Education, Kingston University London, Kingston upon Thames KT1 2EE, United Kingdom; School of Pharmacy, The University of Auckland, Auckland, New Zealand
| | - Simon W Gould
- Faculty of Health, Science, Social Care and Education, Kingston University London, Kingston upon Thames KT1 2EE, United Kingdom
| | - Mouhamad Khoder
- Faculty of Health, Science, Social Care and Education, Kingston University London, Kingston upon Thames KT1 2EE, United Kingdom.
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Khoder M, Schropp V, Zeitler S, Pereira B, Habashy R, Royall PG, Wang JTW, Alhnan MA. A novel natural GRAS-grade enteric coating for pharmaceutical and nutraceutical products. Int J Pharm 2020; 584:119392. [DOI: 10.1016/j.ijpharm.2020.119392] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 01/23/2023]
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Wall S. Prevention of antibiotic resistance - an epidemiological scoping review to identify research categories and knowledge gaps. Glob Health Action 2019; 12:1756191. [PMID: 32475304 PMCID: PMC7782542 DOI: 10.1080/16549716.2020.1756191] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 04/10/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Antibiotics have become the cornerstone for the treatment of infectious diseases and contributed significantly to the dramatic global health development during the last 70 years. Millions of people now survive what were previously life-threatening infections. But antibiotics are finite resources and misuse has led to antibiotic resistance and reduced efficacy within just a few years of introduction of each new antibiotic. The World Health Organization rates antibiotic resistance as a 'global security threat' impacting on global health, food security and development and as important as terrorism and climate change. OBJECTIVES This paper explores, through a scoping review of the literature published during the past 20 years, the magnitude of peer-reviewed and grey literature that addresses antibiotic resistance and specifically the extent to which "prevention" has been at the core. The ultimate aim is to identify know-do gaps and strategies to prevent ABR. METHODS The review covers four main data bases, Web of Science, Medline, Scopus and Ebsco searched for 2000-17. The broader research field "antibiotic OR antimicrobial resistance" gave 431,335 hits. Narrowing the search criteria to "Prevention of antibiotic OR antimicrobial resistance" resulted in 1062 remaining titles. Of these, 622 were unique titles. After screening of the 622 titles for relevance, 420 abstracts were read, and of these 282 papers were read in full. An additional 53 references were identified from these papers, and 64 published during 2018 and 2019 were also included. The final scoping review database thus consisted of 399 papers. RESULTS A thematic structure emerged when categorizing articles in different subject areas, serving as a proxy for interest expressed from the research community. The research area has been an evolving one with about half of the 399 papers published during the past four years of the study period. Epidemiological modelling needs strengthening and there is a need for more and better surveillance systems, especially in lower- and middle-income countries. There is a wealth of information on the local and national uses and misuses of antibiotics. Educational and stewardship programmes basically lack evidence. Several studies address knowledge of the public and prescribers. The lessons for policy are conveyed in many alarming reports from national and international organizations. CONCLUSIONS Descriptive rather than theoretical ambitions have characterized the literature. If we want to better understand and explain the antibiotic situation from a behavioural perspective, the required approaches are lacking. A framework for an epidemiological causal web behind ABR is suggested and may serve to identify entry points for potential interventions.
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Affiliation(s)
- Stig Wall
- Department of Epidemiology and Global Health, Umeå University, Umeå, Sweden
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Douafer H, Andrieu V, Phanstiel O, Brunel JM. Antibiotic Adjuvants: Make Antibiotics Great Again! J Med Chem 2019; 62:8665-8681. [PMID: 31063379 DOI: 10.1021/acs.jmedchem.8b01781] [Citation(s) in RCA: 152] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Multiple approaches have been developed to combat bacterial resistance. However, the combination of antibiotic resistance mechanisms by bacteria and the limited number of effective antibiotics available decreases the effective interventions for the treatment of current bacterial infections. This review covers the many ways that bacteria resist antibiotics including antibiotic target modification, the use of efflux pumps, and antibiotic inactivation. As a pertinent example, the use of beta lactamase inhibitors in combination with β-lactam containing antibiotics is discussed in detail. The solution to emerging antibiotic resistance may involve combination therapies of existing antibiotics and potentiating adjuvants, which re-empower the antibiotic agent to become efficacious against the resistant strain of interest. We report herein that a reasoned adjuvant design permits one to perform polypharmacy on bacteria by not only providing greater internal access to the codosed antibiotics but also by de-energizing the efflux pumps used by the bacteria to escape antibiotic action.
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Affiliation(s)
- Hana Douafer
- Aix Marseille University , INSERM, SSA, MCT , 13385 Marseille , France
| | - Véronique Andrieu
- Aix Marseille University , IRD, APHM, MEPHI, IHU Méditerranée Infection, Faculté de Médecine et de Pharmacie , 13385 Marseille , France
| | - Otto Phanstiel
- 12722 Research Parkway, College of Medicine , University of Central Florida , Orlando , Florida 32826 , United States
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Khoder M, Gbormoi HK, Ryan A, Karam A, Alany RG. Potential Use of the Maillard Reaction for Pharmaceutical Applications: Gastric and Intestinal Controlled Release Alginate-Albumin Beads. Pharmaceutics 2019; 11:pharmaceutics11020083. [PMID: 30781442 PMCID: PMC6410193 DOI: 10.3390/pharmaceutics11020083] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/07/2019] [Accepted: 02/13/2019] [Indexed: 12/14/2022] Open
Abstract
In this study, bovine serum albumin (BSA) and alginate (ALG) conjugates were synthesized by the Maillard reaction in order to evaluate their potential to develop controlled release drug delivery systems. The progress of the Maillard reaction was evidenced using ultraviolet (UV) absorbance, determination of BSA remaining free amino groups, and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). BSA-ALG conjugates possessed enhanced and tunable viscosity, foamability and foam stability. Foam generated from BSA-ALG conjugate solution was used to prepare floating gastroretentive calcium ALG beads. Unlike traditional ALG beads, BSA-ALG foam beads were able to float and sustain the ciprofloxacin (CIP) release in gastric medium. Interestingly, intestinal beads made of ALG, BSA-ALG physical mixture and BSA-ALG conjugate resulted in different release rates and orders of indomethacin (IND) in simulated intestinal fluids; while beads based on a physical mixture of BSA-ALG resulted in a first order sustained release profile, both systems based on ALG and BSA-ALG conjugate displayed zero order sustained release profiles with IND being released at a slower rate from the conjugate beads.
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Affiliation(s)
- Mouhamad Khoder
- Drug Discovery, Delivery and Patient Care (DDDPC) Theme, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston Upon Thames, London KT1 2EE, UK.
| | - Henry K Gbormoi
- Drug Discovery, Delivery and Patient Care (DDDPC) Theme, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston Upon Thames, London KT1 2EE, UK.
- Liberia Medicines & Health Products Regulatory Authority (LMHRA), Monrovia, Liberia.
| | - Ali Ryan
- Drug Discovery, Delivery and Patient Care (DDDPC) Theme, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston Upon Thames, London KT1 2EE, UK.
| | - Ayman Karam
- Institut de Chimie des Milieux et Matériaux de Poitiers, Université de Poitiers, Centre National de la Recherche Scientifique, ENSIP, TSA 51106 Poitiers, France.
| | - Raid G Alany
- Drug Discovery, Delivery and Patient Care (DDDPC) Theme, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston Upon Thames, London KT1 2EE, UK.
- School of Pharmacy, The University of Auckland, Auckland 1142, New Zealand.
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Palugan L, Cerea M, Zema L, Gazzaniga A, Maroni A. Coated pellets for oral colon delivery. J Drug Deliv Sci Technol 2015. [DOI: 10.1016/j.jddst.2014.12.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Maroni A, Zema L, Del Curto MD, Foppoli A, Gazzaniga A. Oral colon delivery of insulin with the aid of functional adjuvants. Adv Drug Deliv Rev 2012; 64:540-56. [PMID: 22086142 DOI: 10.1016/j.addr.2011.10.006] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 09/30/2011] [Accepted: 10/27/2011] [Indexed: 12/11/2022]
Abstract
Oral colon delivery is currently considered of importance not only for the treatment of local pathologies, such as primarily inflammatory bowel disease (IBD), but also as a means of accomplishing systemic therapeutic goals. Although the large bowel fails to be ideally suited for absorption processes, it may indeed offer a number of advantages over the small intestine, including a long transit time, lower levels of peptidases and higher responsiveness to permeation enhancers. Accordingly, it has been under extensive investigation as a possible strategy to improve the oral bioavailability of peptide and protein drugs. Because of a strong underlying rationale, most of these studies have focused on insulin. In the present review, the impact of key anatomical and physiological characteristics of the colon on its viability as a protein release site is discussed. Moreover, the main formulation approaches to oral colon targeting are outlined along with the design features and performance of insulin-based devices.
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