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In situ Quantification of Pancreatic Beta-cell Mass in Mice
Published on: June 7, 2010
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Development of a microchannel emulsification process for pancreatic beta cell encapsulation.
Christina M E Bitar1, Karen E Markwick1, Dušana Treľová2
1Department of Chemical Engineering, McGill University, Montreal, Quebec, Canada.
Biotechnology Progress
|May 28, 2019
Summary
High-throughput microchannel emulsification creates uniform alginate beads for pancreatic beta cell encapsulation. This method offers improved bead strength and cell viability, advancing therapeutic applications.
Area of Science:
- Biomaterials Engineering
- Cell Encapsulation Technology
- Regenerative Medicine
Background:
- Pancreatic beta cell encapsulation is crucial for treating type 1 diabetes.
- Existing methods like stirred emulsification face challenges in uniformity and scalability.
- Alginate beads are a common matrix for cell encapsulation due to their biocompatibility.
Purpose of the Study:
- To develop and evaluate a high-throughput microchannel emulsification process for pancreatic beta cell encapsulation.
- To compare the properties of microchannel-emulsified alginate beads with those produced by stirred emulsification.
- To optimize the process for enhanced bead quality and encapsulated cell viability.
Main Methods:
- Utilized a microchannel plate with rectangular channels (700 × 200 μm) for alginate solution (0.5-2.5%) containing cells and CaCO3.
- Employed internal gelation for bead formation.
- Varied process parameters including alginate concentration and residence time.
- Assessed bead size distribution, compressive burst strength, alginate concentration uniformity, and cell viability (live/dead staining).
Main Results:
- Achieved high-throughput production (>140 mL/hr per microchannel) of monodisperse alginate beads (1.5-3 mm diameter).
- Microchannel emulsification yielded beads with narrower size distribution and superior compressive burst strength compared to stirred emulsification.
- Demonstrated homogeneous alginate concentration profiles within beads.
- Attained high encapsulated beta cell viability (89 ± 2%) by minimizing exposure to the acidified organic phase.
Conclusions:
- Microchannel emulsification is an effective high-throughput method for producing uniform alginate beads for pancreatic beta cell encapsulation.
- The process offers significant advantages in bead quality and cell viability over traditional methods.
- This technology holds promise for clinical applications in diabetes treatment and other industries like pharmaceuticals, food, and cosmetics.
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