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Zhao X, Li T, Guo T, He X, Ren X, Wang M, Wang C, Peng C, Zhang J, Wu L. Supramolecular Structure of the β-Cyclodextrin Metal-Organic Framework Optimizes Iodine Stability and Its Co-delivery with l-Menthol for Antibacterial Applications. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38688002 DOI: 10.1021/acsami.4c02258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The spread of upper respiratory tract (URT) infections harms people's health and causes social burdens. Developing targeted treatment strategies for URT infections that exhibit good biocompatibility, stability, and strong antimicrobial effects remains challenging. The dual antimicrobial and antiviral effects of iodine (I2) in combination with the cooling sensation of l-menthol in the respiratory tract can simultaneously alleviate URT inflammation symptoms. However, as both I2 and l-menthol are volatile, addressing stability issues is crucial. In this study, a potassium iodide β-cyclodextrin metal-organic framework [β-CD-POF(I)] with appropriate particle size was used to coload and deliver I2 and l-menthol. Primarily, β-CD-POF(I) was employed as the most efficient carrier to significantly enhance the stability of I2, surpassing any other known protection strategies in the pharmaceutical field (CD complexations, PVP conjugations, and cadexomer iodine). The mechanism underlying the improvement in stability of I2 by β-CD-POF(I) was investigated through scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and molecular docking. The results revealed that the key processes involved in improving stability were the inclusion of I2 by β-CD cavities in β-CD-POF(I) and the formation of polyiodide anion between iodine ions and I2. Furthermore, the potential of β-CD-POF(I) to load and deliver drugs was validated, and coloading of l-menthol and I2 demonstrated reliable stability. β-CD-POF(I) achieved a rate of URT deposition ≥95% in vitro, and the combined antibacterial effects of coloaded I2 and l-menthol was better than I2 or PVP-I alone, with no irritation noted following URT administration in rabbits. Therefore, the stable coloading of drugs by β-CD-POF(I), leading to enhanced antimicrobial effects, provides a new strategy for treating URT infections.
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Affiliation(s)
- Xiangyu Zhao
- Anhui University of Chinese Medicine, Hefei 230012, China
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Yangtze Delta Drug Advanced Research Institute, Nantong 226133, China
| | - Tianfu Li
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Shenyang Pharmaceutical University, Shenyang 110016, China
- Yangtze Delta Drug Advanced Research Institute, Nantong 226133, China
| | - Tao Guo
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
| | - Xiaojian He
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
- Yangtze Delta Drug Advanced Research Institute, Nantong 226133, China
| | - Xiaohong Ren
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
| | - Manli Wang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
| | - Caifen Wang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Can Peng
- Anhui University of Chinese Medicine, Hefei 230012, China
- Yangtze Delta Drug Advanced Research Institute, Nantong 226133, China
| | - Jiwen Zhang
- Anhui University of Chinese Medicine, Hefei 230012, China
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
- NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients, National Institutes for Food and Drug Control, Beijing 100050, China
| | - Li Wu
- Anhui University of Chinese Medicine, Hefei 230012, China
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China
- Shenyang Pharmaceutical University, Shenyang 110016, China
- Yangtze Delta Drug Advanced Research Institute, Nantong 226133, China
- NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients, National Institutes for Food and Drug Control, Beijing 100050, China
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Attal H, Huang Z, Kuan WS, Weng Y, Tan HY, Seow E, Peng LL, Lim HC, Chow A. N-of-1 Trials of Antimicrobial Stewardship Interventions to Optimize Antibiotic Prescribing for Upper Respiratory Tract Infection in Emergency Departments: Protocol for a Quasi-Experimental Study. JMIR Res Protoc 2024; 13:e50417. [PMID: 38381495 PMCID: PMC10918537 DOI: 10.2196/50417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 01/27/2024] [Accepted: 01/29/2024] [Indexed: 02/22/2024] Open
Abstract
BACKGROUND Antimicrobial stewardship programs attempting to optimize antibiotic therapy and clinical outcomes mainly focus on inpatient and outpatient settings. The lack of antimicrobial stewardship program studies in the emergency department (ED) represents a gap in tackling the problem of antimicrobial resistance as EDs treat a substantial number of upper respiratory tract infection cases throughout the year. OBJECTIVE We intend to implement two evidence-based interventions: (1) patient education and (2) providing physician feedback on their prescribing rates. We will incorporate evidence from a literature review and contextualizing the interventions based on findings from a local qualitative study. METHODS Our study uses a quasi-experimental design to evaluate the effects of interventions over time in the EDs of 4 public hospitals in Singapore. We will include an initial control period of 18 months. In the next 6 months, we will randomize 2 EDs to receive 1 intervention (ie, patient education) and the other 2 EDs to receive the alternative intervention (ie, physician feedback). All EDs will receive the second intervention in the subsequent 6 months on top of the ongoing intervention. Data will be collected for another 6 months to assess the persistence of the intervention effects. The information leaflets will be handed to patients at the EDs before they consult with the physician, while feedback to individual physicians by senior doctors is in the form of electronic text messages. The feedback will contain the physicians' antibiotic prescribing rate compared with the departments' overall antibiotic prescribing rate and a bite-size message on good antibiotic prescribing practices. RESULTS We will analyze the data using segmented regression with difference-in-difference estimation to account for concurrent cluster comparisons. CONCLUSIONS Our proposed study assesses the effectiveness of evidence-based, context-specific interventions to optimize antibiotic prescribing in EDs. These interventions are aligned with Singapore's national effort to tackle antimicrobial resistance and can be scaled up if successful. TRIAL REGISTRATION ClinicalTrials.gov NCT05451863; https://clinicaltrials.gov/study/NCT05451836. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/50417.
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Affiliation(s)
- Hersh Attal
- Accident & Emergency Department, Changi General Hospital, Singapore, Singapore
| | - Zhilian Huang
- Department of Preventive and Population Medicine, Office of Clinical Epidemiology, Analytics, and Knowledge, Tan Tock Seng Hospital, Singapore, Singapore
| | - Win Sen Kuan
- Department of Emergency Medicine, National University Hospital, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yanyi Weng
- Department of Emergency Medicine, Tan Tock Seng Hospital, Singapore, Singapore
| | - Hann Yee Tan
- Acute and Emergency Care Department, Khoo Teck Puat Hospital, Singapore, Singapore
| | - Eillyne Seow
- Acute and Emergency Care Department, Khoo Teck Puat Hospital, Singapore, Singapore
| | - Li Lee Peng
- Department of Emergency Medicine, National University Hospital, Singapore, Singapore
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Hoon Chin Lim
- Accident & Emergency Department, Changi General Hospital, Singapore, Singapore
| | - Angela Chow
- Department of Preventive and Population Medicine, Office of Clinical Epidemiology, Analytics, and Knowledge, Tan Tock Seng Hospital, Singapore, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
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Huang Z, Kuan WS, Tan HY, Seow E, Tiah L, Peng LL, Weng Y, Chow A. Antibiotic expectation, behaviour, and receipt among patients presenting to emergency departments with uncomplicated upper respiratory tract infection during the COVID-19 pandemic. J Glob Antimicrob Resist 2023; 33:89-96. [PMID: 36906173 PMCID: PMC9998126 DOI: 10.1016/j.jgar.2023.02.025] [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: 11/09/2022] [Revised: 02/01/2023] [Accepted: 02/25/2023] [Indexed: 03/13/2023] Open
Abstract
OBJECTIVES Pre-COVID-19 pandemic, patients who attended the emergency department (ED) for upper respiratory tract infection (URTI) were more likely to receive antibiotics if they expected them. These expectations could have changed with the change in health-seeking behaviour during the pandemic. We assessed the factors associated with antibiotics expectation and receipt for uncomplicated URTI patients in four Singapore EDs during the COVID-19 pandemic. METHODS We conducted a cross-sectional study on adult patients with URTI from March 2021 to March 2022 in four Singapore EDs and assessed the determinants of antibiotics expectation and receipt using multivariable logistic regression models. We also assessed the reasons patients expect antibiotics during their ED visit. RESULTS Among 681 patients, 31.0% expected antibiotics while 8.7% received antibiotics during their ED visit. Factors (adjusted odds ratio [95% confidence interval]) that significantly influenced expectation for antibiotics include: 1) prior consultation for current illness with (6.56 [3.30-13.11]) or without (1.50 [1.01-2.23]) antibiotics prescribed; 2) anticipation for COVID-19 test (1.56 [1.01-2.41]); and 3) poor (2.16 [1.26-3.68]) to moderate (2.26 [1.33-3.84]) knowledge on antibiotics use and resistance. Patients expecting antibiotics were 10.6 times (10.64 [5.34-21.17]) more likely to receive antibiotics. Those with tertiary education were twice (2.20 [1.09-4.43]) as likely to receive antibiotics. CONCLUSION In conclusion, patients with URTI who expected antibiotics to be prescribed remained more likely to receive it during the COVID-19 pandemic. This highlights the need for more public education on the non-necessity for antibiotics for URTI and COVID-19 to address the problem of antibiotic resistance.
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Affiliation(s)
- Zhilian Huang
- Department of Preventive and Population Medicine, Office of Clinical Epidemiology, Analytics, and Knowledge [OCEAN], Tan Tock Seng Hospital, Singapore; Infectious Diseases Research and Training Office, National Centre for Infectious Diseases, Singapore.
| | - Win Sen Kuan
- Department Emergency Medicine, National University Hospital, Singapore; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Hann Yee Tan
- Acute and Emergency Care Department, Khoo Teck Puat Hospital, Singapore.
| | - Eillyne Seow
- Acute and Emergency Care Department, Khoo Teck Puat Hospital, Singapore.
| | - Ling Tiah
- Accident and Emergency Department, Changi General Hospital, Singapore.
| | - Li Lee Peng
- Department Emergency Medicine, National University Hospital, Singapore; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Yanyi Weng
- Department Emergency Medicine, Tan Tock Seng Hospital, Singapore.
| | - Angela Chow
- Department of Preventive and Population Medicine, Office of Clinical Epidemiology, Analytics, and Knowledge [OCEAN], Tan Tock Seng Hospital, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Infectious Diseases Research and Training Office, National Centre for Infectious Diseases, Singapore; Saw Swee Hock School of Public Health, National University Singapore, Singapore.
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Lin L, Fan H, Zhang D, Lu G. Talaromyces marneffei infection associated with bronchiolitis obliterans in an HIV-negative child: a case report. BMC Infect Dis 2022; 22:468. [PMID: 35578185 PMCID: PMC9109386 DOI: 10.1186/s12879-022-07391-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 04/18/2022] [Indexed: 11/10/2022] Open
Abstract
Background Talaromyces marneffei is an opportunistic pathogen that infects immunodeficient and immunocompromised patients. We presented a pediatric patient with a diagnosis of T. marneffei infection who was followed up in the Guangzhou Women and Children’s Medical Centre. Case presentation The child was a 5-year-old girl with persistent cough and gasping over 2 months who was confirmed with T. marneffei infection by bronchoalveolar lavage fluid culture and high-throughput sequencing technology. Human immunodeficiency virus (HIV) was negative according to a serum-specific antibody test. She was treated with amphotericin B and itraconazole as antifungal agents, with good clinical response. At follow-up, high-resolution computed tomography showed a mosaic sign in the whole lung field with a diagnosis of post-infectious bronchiolitis obliterans (PIBO) as the sequela. She has a mutated COPA gene with uncertain pathogenic potential on whole-exome sequencing. Conclusions Clinicians should consider PIBO as a possible sequela in an HIV-negative paediatric patient with T. marneffei infection.
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Affiliation(s)
- Lin Lin
- Department of Respiration, Guangzhou Women and Children's Medical Centre, Guangzhou Medical University, No. 9, Jinsui Road, Zhujiang New City, Tianhe, Guangzhou, 510120, Guangdong, China
| | - Huifeng Fan
- Department of Respiration, Guangzhou Women and Children's Medical Centre, Guangzhou Medical University, No. 9, Jinsui Road, Zhujiang New City, Tianhe, Guangzhou, 510120, Guangdong, China
| | - Dongwei Zhang
- Department of Respiration, Guangzhou Women and Children's Medical Centre, Guangzhou Medical University, No. 9, Jinsui Road, Zhujiang New City, Tianhe, Guangzhou, 510120, Guangdong, China
| | - Gen Lu
- Department of Respiration, Guangzhou Women and Children's Medical Centre, Guangzhou Medical University, No. 9, Jinsui Road, Zhujiang New City, Tianhe, Guangzhou, 510120, Guangdong, China.
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Development of Bactericidal Peptides against Multidrug-Resistant Acinetobacter baumannii with Enhanced Stability and Low Toxicity. Int J Mol Sci 2022; 23:ijms23042191. [PMID: 35216307 PMCID: PMC8875074 DOI: 10.3390/ijms23042191] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/10/2022] [Accepted: 02/15/2022] [Indexed: 12/26/2022] Open
Abstract
Pathogenic superbugs are the root cause of untreatable complex infections with limited or no treatment options. These infections are becoming more common as clinical antibiotics have lost their effectiveness over time. Therefore, the development of novel antibacterial agents is urgently needed to counter these microbes. Antimicrobial peptides (AMPs) are a viable treatment option due to their bactericidal potency against multiple microbial classes. AMPs are naturally selected physiological microbicidal agents that are found in all forms of organisms. In the present study, we developed two tilapia piscidin 2 (TP2)-based AMPs for antimicrobial application. Unlike the parent peptide, the redesigned peptides showed significant antimicrobial activity against multidrug-resistant bacterial species. These peptides also showed minimal cytotoxicity. In addition, they were significantly active in the presence of physiological salts, 50% human serum and elevated temperature. The designed peptides also showed synergistic activity when combined with clinical antibiotics. The current approach demonstrates a fruitful strategy for developing potential AMPs for antimicrobial application. Such AMPs have potential for progression to further trials and drug development investigations.
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