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. 2022 Nov 25;12(23):4189.
doi: 10.3390/nano12234189.

Effect of Chitosan Coating for Efficient Encapsulation and Improved Stability under Loading Preparation and Storage Conditions of Bacillus Lipopeptides

Beom Ryong Kang  1 , Joon Seong Park  2 , Gwang Rok Ryu  3 , Woo-Jin Jung  1   3 , Jun-Seok Choi  3 , Hye-Min Shin  3
Affiliations

Effect of Chitosan Coating for Efficient Encapsulation and Improved Stability under Loading Preparation and Storage Conditions of Bacillus Lipopeptides

Beom Ryong Kang et al. Nanomaterials (Basel). .

Abstract

This study aims to evaluate the effect of chitosan coating on the formation and properties of Bacillus cyclic lipopeptide (CLP)-loaded liposomes. A nanoencapsulation strategy for a chitosan-coated liposomal system using lecithin phospholipids for the entrapment of antibiotic CLP prepared from Bacillus subtilis KB21 was developed. The produced chitosan-coated CLP liposome had mean size in the range of 118.47-121.67 nm. Transmission electron microscopy showed the spherical-shaped vesicles. Fourier transform infrared spectroscopy findings indicated the successful coating of the produced CLP-loaded liposomes by the used chitosan. Liposomes coated with 0.2% and 0.5% chitosan concentration decreased the surface tension by 7.3-12.1%, respectively, and increased the CLP content by 15.1-27.0%, respectively, compared to the uncoating liposomes. The coated concentration of chitosan influenced their CLP loading encapsulation efficiency and release kinetics. The physicochemical results of the dynamic light scattering, CLP capture efficiency and long-term storage capacity of nanocapsules increased with chitosan coating concentration. Furthermore, the chitosan-coated liposomes exhibited a significant enhancement in the stability of CLP loading liposomes. These results may suggest the potential application of chitosan-coated liposomes as a carrier of antibiotics in the development of the functional platform.

Keywords: chitosan; cyclic lipopeptide; liposome; nanoencapsulation.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Surface tension (a) and CLP level (b) of the prepared CCL. The surface tension of water control was 73.2 ± 0.1 mN/m. Data represent means ± standard errors of three replicates. The values followed by different letters in a column were significantly different at p < 0.05 by Duncan’s multiple range test.
Figure 2
Figure 2
TEM image of CLP-loaded liposomes and CS-coated CLP liposomes (magnification = 25,000×).
Figure 3
Figure 3
Size distributions (average diameter) of CS-coated CLP-loaded liposome (CCL). BLK NLs, blank liposome.
Figure 4
Figure 4
Encapsulation efficiency of CLP-loaded liposomes from CCL products (a) and in vitro the CLP release profiles (b) at various CS-coated concentration from CCL products. Data represent means ± standard errors of three replicates. The values followed by different letters in a column were significantly different at p < 0.05 by Duncan’s multiple range test.
Figure 5
Figure 5
FT-IR spectra of 0% and 0.5% CCL, CS, and culture filtrate of Bs KB21.
See this image and copyright information in PMC

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