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Probiotic Studies in Neonatal Mice Using Gavage
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Material distributions and functional structures in probiotic microcapsules.

Li Wu1, Wei Qin2, Yuanzhi He2

  • 1Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China; School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Yantai University, Yantai 264005, China.

European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences
|June 24, 2018
PubMed
Summary
This summary is machine-generated.

Microcapsule design enhances probiotic survival against stomach acid. Synchrotron radiation X-ray microcomputed tomography (SR-μCT) revealed structural defects needing formulation and processing improvements for better delivery of Bifidobacterium and Lactobacillus.

Keywords:
DistributionMicrocapsulesProbioticsStructureSynchrotron radiation X-ray microcomputed tomography

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Area of Science:

  • Pharmaceutical Sciences
  • Materials Science
  • Microbiology

Background:

  • Probiotic viability is crucial for efficacy, often compromised by harsh gastrointestinal conditions.
  • Microencapsulation offers a protective strategy to enhance probiotic survival and shelf-life.
  • Advanced imaging is needed to understand microcapsule structure-function relationships.

Purpose of the Study:

  • To quantitatively characterize the microstructure of probiotic microcapsules using SR-μCT.
  • To identify structural features influencing the survival of Bifidobacterium and Lactobacillus.
  • To provide insights for optimizing microencapsulation technologies.

Main Methods:

  • Synchrotron radiation X-ray microcomputed tomography (SR-μCT) was employed for high-resolution 3D imaging.
  • Image analysis techniques were used to segment and quantify material distribution within microcapsules.
  • Microcapsule components (shell, protective layer, core) were visualized and analyzed.

Main Results:

  • Complete encapsulation of microorganisms by the shell was confirmed, offering protection from the external environment.
  • Significant variations in shell thickness and presence of structural defects were quantitatively identified.
  • Detailed visualization of the internal microstructure, including probiotic distribution, was achieved.

Conclusions:

  • SR-μCT provides critical quantitative data on microcapsule microstructure.
  • Observed structural heterogeneities highlight areas for improvement in microencapsulation formulations.
  • Further advancements in processing technologies are necessary for robust probiotic delivery systems.