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Development of enteric polymer-based microspheres by spray-drying for colonic delivery of Lactobacillus rhamnosus GG.

Abstract：

:Antibiotics are well-known disruptive elements of the intestinal microbiota and antibiotic-associated diarrhea appeared as the most common complication related with post-antibiotic dysbiosis. Lactobacillus rhamnosus GG (LGG) strain is very effective in preventing antibiotic-associated diarrhea in children and adults. However, as any probiotics, it is concerned by the loss of viability during storage and gastrointestinal transit. The aim of this study was to develop an encapsulation system suitable for the specific colonic delivery of LGG strain after oral administration. For this purpose, spray-dried Eudragit® S100 microparticles encapsulating LGG bacteria were developed by using an aqueous based spray-drying approach, avoiding the use of organic solvents. Carbohydrates were added to the formulation since they are widely used as protective agents of bacteria against the harmful effect of dehydration stress. Here, both Surface Enhanced Raman Scattering (SERS) and conventional plate count methods showed that carbohydrates increased the survival ratio of bacteria after spray-drying from 3 to more than 50%. Moreover, these protective agents ensured low residual moisture content thus providing great stability of the cells in the spray-dried powder during storage. Significant improvement of the cell viability in simulated gastro intestinal fluid (SGIF) was observed for encapsulated cells as compared with free LGG bacteria for which no viable cell was detectable after 1 h incubation in gastric fluid only. As a consequence, 4.5 × 107 CFU/g of encapsulated LGG were found viable after incubation of microparticles 1 h in Simulated Gastric Fluid followed by 6 h in Simulated Intestinal Fluid, corresponding to less than 3 log reduction of viable cells during the 7 h incubation in Simulated Gastro Intestinal Fluid. These results attested that the developed encapsulation system is suitable for its use as a bacteria carrier for specific colonic delivery.

journal_name

Int J Pharm

journal_title

International journal of pharmaceutics

authors

Akanny E,Bourgeois S,Bonhommé A,Commun C,Doleans-Jordheim A,Bessueille F,Bordes C

doi

10.1016/j.ijpharm.2020.119414

subject

Has Abstract

pub_date

2020-06-30 00:00:00

pages

119414

eissn

0378-5173

issn

1873-3476

pii

S0378-5173(20)30398-7

journal_volume

584

pub_type

杂志文章

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