Innovative Microencapsulation of Polymyxin B for Enhanced Antimicrobial Efficacy via Coated Spray Drying

Yousfan, Amal, Al Khatib, Arwa Omar, Salman, Afrah M. H., Abu Elella, Mahmoud H., Barrett, Glyn, Michael, Nicholas, Zariwala, M. and Al-Obaidi, H. 2024. Innovative Microencapsulation of Polymyxin B for Enhanced Antimicrobial Efficacy via Coated Spray Drying. Molecular Pharmaceutics. Advanced online publication. https://doi.org/10.1021/acs.molpharmaceut.4c00594

TitleInnovative Microencapsulation of Polymyxin B for Enhanced Antimicrobial Efficacy via Coated Spray Drying
TypeJournal article
AuthorsYousfan, Amal, Al Khatib, Arwa Omar, Salman, Afrah M. H., Abu Elella, Mahmoud H., Barrett, Glyn, Michael, Nicholas, Zariwala, M. and Al-Obaidi, H.
Abstract

This study aims to develop an innovative microencapsulation method for coated Polymyxin B, utilizing various polysaccharides such as hydroxypropyl β-cyclodextrin, alginate, and chitosan, implemented through a three-fluid nozzle (3FN) spray drying process. High-performance liquid chromatography (HPLC) analysis revealed that formulations with a high ratio of sugar cage, hydroxypropyl β-cyclodextrin (HPβCD), and sodium alginate (coded as ALGHCDHPLPM) resulted in a notable 16-fold increase in Polymyxin B recovery compared to chitosan microparticles. Morphological assessments using fluorescence labeling confirmed successful microparticle formation with core/shell structures. Alginate-based formulations exhibited distinct layers, while chitosan formulations showed uniform fluorescence throughout the microparticles. Focused beam reflectance and histograms from fluorescence microscopic measurements provided insights into physical size analysis, indicating consistent sizes of 6.8 ± 1.2 μm. Fourier-transform infrared (FTIR) spectra unveiled hydrogen bonding between Polymyxin B and other components within the microparticle structures. The drug release study showed sodium alginate’s sustained release capability, reaching 26 ± 3% compared to 94 ± 3% from the free solution at the 24 h time point. Furthermore, the antimicrobial properties of the prepared microparticles against two Gram-negative bacteria, Escherichia coli and Pseudomonas aeruginosa, were investigated. The influence of various key excipients on the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values was evaluated. Results demonstrated effective bactericidal effects of ALGHCDHPLPM against both E. coli and P. aeruginosa. Additionally, the antibiofilm assay highlighted the potential efficacy of ALGHCDHPLPM against the biofilm viability of E. coli and P. aeruginosa, with concentrations ranging from 3.9 to 500 μg/m. This signifies a significant advancement in antimicrobial drug delivery systems, promising improved precision and efficacy in combating bacterial infections.

JournalMolecular Pharmaceutics
ISSN1543-8384
1543-8392
Year2024
PublisherAmerican Chemical Society (ACS)
Publisher's version
License
CC BY 4.0
File Access Level
Open (open metadata and files)
Digital Object Identifier (DOI)https://doi.org/10.1021/acs.molpharmaceut.4c00594
Publication dates
Published online08 Oct 2024
LicenseCC BY 4.0

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PPARs and the orchestration of metabolic fuel selection
Sugden, M.C., Zariwala, M.G. and Holness, M.J. 2009. PPARs and the orchestration of metabolic fuel selection. Pharmacological Research. 60 (3), p. 141–150. https://doi.org/10.1016/j.phrs.2009.03.014

Prolactin in culture leads to a shift in stimulatory threshold but does not augment the K-ATP channel independent pathway for glucose-stimulated insulin secretion
Zariwala, M., Holness, M.J., Turner, M.D. and Sugden, M.C. 2007. Prolactin in culture leads to a shift in stimulatory threshold but does not augment the K-ATP channel independent pathway for glucose-stimulated insulin secretion. Diabetic Medicine. 24 (S1), p. 33. https://doi.org/10.1111/j.1464-5491.2007.02126.x

Enhancement of immune response of HBsAg loaded poly(L-lactic acid) microspheres against Hepatitis B through incorporation of alum and chitosan
Pandit, S., Cevher, E, Zariwala, M., Somavarapu, S. and Alpar, H.O. 2007. Enhancement of immune response of HBsAg loaded poly(L-lactic acid) microspheres against Hepatitis B through incorporation of alum and chitosan. Journal of Microencapsulation. 24 (6), p. 539–552. https://doi.org/10.1080/02652040701443700

Diet, obesity and diabetes: a current update
Walker, C.G., Zariwala, M.G., Holness, M.J. and Sugden, M.C. 2007. Diet, obesity and diabetes: a current update. Clinical Science. 112 (2), pp. 93-111. https://doi.org/10.1042/CS20060150

Early protein restriction attenuates effects of increased age to suppress the response of adipose-tissue LPL activity to feeding
Zariwala, M., Holness, M.J. and Sugden, M.C. 2006. Early protein restriction attenuates effects of increased age to suppress the response of adipose-tissue LPL activity to feeding. Diabetic Medicine. 23 (S2), pp. 31-138. https://doi.org/10.1111/j.1466-5468.2006.01875.x

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