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Published on: March 31, 2022
Meta-Analysis of Drug Delivery Approaches for Treating Intracellular Infections
Sooyoung Shin1,2, Soonbum Kwon3, Yoon Yeo4,5
1College of Pharmacy, Ajou University, Suwon, Gyeonggi-do, 16499, Republic of Korea. syshin@ajou.ac.kr.
Abstract:
This meta-analysis aims to evaluate the trend, methodological quality and completeness of studies on intracellular delivery of antimicrobial agents. PubMed, Embase, and reference lists of related reviews were searched to identify original articles that evaluated carrier-mediated intracellular delivery and pharmacodynamics (PD) of antimicrobial therapeutics against intracellular pathogens in vitro and/or in vivo. A total of 99 studies were included in the analysis. The most commonly targeted intracellular pathogens were bacteria (62.6%), followed by viruses (16.2%) and parasites (15.2%). Twenty-one out of 99 (21.2%) studies performed neither microscopic imaging nor flow cytometric analysis to verify that the carrier particles are present in the infected cells. Only 31.3% of studies provided comparative inhibitory concentrations against a free drug control. Approximately 8% of studies, albeit claimed for intracellular delivery of antimicrobial therapeutics, did not provide any experimental data such as microscopic imaging, flow cytometry, and in vitro PD. Future research on intracellular delivery of antimicrobial agents needs to improve the methodological quality and completeness of supporting data in order to facilitate clinical translation of intracellular delivery platforms for antimicrobial therapeutics.
Insights
This meta-analysis reviewed studies on intracellular delivery of antimicrobial agents. Many studies lacked rigorous methods and complete data, hindering clinical translation of these promising drug delivery platforms.
Area of Science:
- Pharmacology
- Microbiology
- Drug Delivery Systems
Background:
- Intracellular pathogens pose significant treatment challenges.
- Carrier-mediated delivery systems offer a promising strategy to enhance antimicrobial efficacy against intracellular infections.
- Evaluating the quality of existing research is crucial for advancing this field.
Purpose of the Study:
- To assess the trends in research on intracellular delivery of antimicrobial agents.
- To evaluate the methodological quality and completeness of studies in this area.
- To identify gaps and limitations hindering clinical translation.
Main Methods:
- A systematic meta-analysis was conducted.
- Searches were performed in PubMed, Embase, and reference lists of reviews.
- Included studies focused on carrier-mediated intracellular delivery and pharmacodynamics (PD) of antimicrobials against intracellular pathogens.
Main Results:
- 99 studies were analyzed, with bacteria being the most targeted pathogen (62.6%).
- Significant methodological gaps were identified: 21.2% lacked cell verification, and only 31.3% provided comparative drug data.
- Many studies (approx. 8%) lacked essential experimental evidence for claimed intracellular delivery.
Conclusions:
- Current research on intracellular antimicrobial delivery often suffers from poor methodological quality and incomplete data.
- Improvements in study design, verification methods, and data reporting are essential.
- Enhancing research rigor will facilitate the clinical translation of novel intracellular delivery platforms for antimicrobial therapeutics.
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