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Rifabutin loaded inhalable β-glucan microparticle based drug delivery system for pulmonary TB. | LitMetric

AI Article Synopsis

  • - Inhalable microparticle systems for delivering anti-TB drugs like Rifabutin are being researched due to their ability to effectively target the lungs, potentially lowering drug dose, treatment duration, and side effects while improving drug availability.
  • - Yeast-derived β-glucan is used in these microparticles, as it helps the particles get absorbed by macrophages through a process called receptor-mediated phagocytosis, enhancing their effectiveness.
  • - The study demonstrated that these β-glucan microparticles are inhalable, stable, and non-toxic at certain concentrations, and they can be rapidly taken up by macrophage cells, laying groundwork for future TB treatment approaches.

Article Abstract

Inhalable microparticle-based anti TB drug delivery systems are being investigated extensively for Tuberculosis [TB] treatment as they offer efficient and deep lung deposition with several advantages over conventional routes. It can reduce the drug dose, treatment duration and toxic effects and optimize the drug bioavailability. Yeast derived β-glucan is a β-[1-3/1-6] linked biocompatible polymer and used as carrier for various biomolecules. Due to presence of glucan chains, particulate glucans act as PAMP and thereby gets internalized via receptor mediated phagocytosis by the macrophages. In this study, β-glucan microparticles were prepared by adding l-leucine as excipient, and exhibited 70% drug [Rifabutin] loading efficiency. Further, the sizing and SEM data of particles revealed a size of 2-4 µm with spherical dimensions. The FTIR and HPLC data confirmed the β-glucan composition and drug encapsulations efficiency of the particles. The mass median aerodynamic diameter [MMAD] and geometric standard deviation [GSD] data indicated that these particles are inhalable in nature and have better thermal stability as per DSC thermogram. These particles were found to be non-toxic upto a concentration of 80 µg/ml and were found to be readily phagocytosed by human macrophage cells in-vitro as well as in-vivo by lung alveolar macrophage. This study provides a framework for future design of inhalable β-glucan particle based host-directed drug delivery system against pulmonary TB.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11253001PMC
http://dx.doi.org/10.1038/s41598-024-66634-5DOI Listing

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