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FEMS Microbiol Lett

Title:		Production of Lactobacillus plantarum ghosts by conditional expression of a prophage-encoded holin
Author(s):		Riangrungroj P; Visessanguan W; Leartsakulpanich U;
Address:		"National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Klong Luang, Pathum Thani 12120, Thailand"
Journal Title:		FEMS Microbiol Lett
Year:		2023
Volume:		370
Issue:
Page Number:		-
DOI:		10.1093/femsle/fnad095
ISSN/ISBN:		1574-6968 (Electronic) 0378-1097 (Linking)
Abstract:		"Bacterial ghosts (BGs) are nonviable empty bacterial cell envelopes with intact cellular morphology and native surface structure. BGs made from pathogenic bacteria are used for biomedical and pharmaceutical applications. However, incomplete pathogenic cell inactivation during BG preparation raises safety concerns that could limit the intended use. Therefore, safer bacterial cell types are needed for BG production. Here, we produced BGs from the food-grade Gram-positive bacterium Lactobacillus plantarum TBRC 2-4 by conditional expression of a prophage-encoded holin (LpHo). LpHo expression was regulated using the pheromone-inducible pSIP system and LpHo was localized to the cell membrane. Upon LpHo induction, a significant growth retardation and a drastic decrease in cell viability were observed. LpHo-induced cells also showed membrane pores by scanning electron microscopy, membrane depolarization by flow cytometry, and release of nucleic acid contents in the cell culture supernatant, consistent with the role of LpHo as a pore-forming protein and L. plantarum ghost formation. The holin-induced L. plantarum BG platform could be developed as a safer alternative vehicle for the delivery of biomolecules"
Keywords:		*Lactobacillus plantarum/genetics Prophages/genetics Cell Membrane/genetics Bacterial Typing Techniques Cell Survival Lactobacillus plantarum antigen delivery system bacterial ghost holin pore formation prophage;
Notes:		"MedlineRiangrungroj, Pinpunya Visessanguan, Wonnop Leartsakulpanich, Ubolsree eng National Center for Genetic Engineering and Biotechnology/ P21-50126/National Science and Technology Development Agency/ P20-50077/Technology Development Groups-Food and Feed/ England 2023/09/22 FEMS Microbiol Lett. 2023 Jan 17; 370:fnad095. doi: 10.1093/femsle/fnad095"