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Related Experiment Videos

Dose control with cell lines used for encapsulated cell therapy.

R H Li1, S Williams, M White

  • 1Genetics Institute, One Burtt Rd, Andover, MA 01810, USA. rli@genetics.com

Tissue Engineering
|December 10, 1999
PubMed
Summary

This study introduces a novel cell therapy method using microcarriers in hydrogels to control cell proliferation for treating neurodegenerative diseases. The technique successfully limited cell growth and enabled tunable therapeutic factor delivery.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Cell Therapy

Background:

  • Cell therapy is a promising treatment for neurodegenerative diseases, requiring devices that maintain cell viability and function.
  • Controlling proliferation of dividing cell lines within implantable devices is crucial to prevent nutrient depletion and ensure therapeutic efficacy.
  • Existing methods face challenges in managing cell growth within intracapsular environments.

Purpose of the Study:

  • To develop and validate a method for controlling cell proliferation within encapsulated devices for sustained therapeutic factor delivery.
  • To demonstrate the ability to regulate the dose of therapeutic molecules released by encapsulated cells.
  • To assess the efficacy of microcarrier-based encapsulation with nonmitogenic hydrogels in managing cell growth.

Main Methods:

Related Experiment Videos

  • Encapsulation of cells within microcarriers, followed by embedding these microcarriers into a nonmitogenic hydrogel within a hollow fiber device.
  • Utilizing PC-12 cells secreting L-dopa and dopamine as a model system for neurotransmitter delivery.
  • Employing C2C12 mouse myoblast cells for neurotrophic factor (CNTF) delivery.
  • In vitro and in vivo assessments of cell proliferation and therapeutic factor release.

Main Results:

  • The microcarrier-hydrogel encapsulation method significantly controlled the proliferation of PC-12 cells compared to controls, with approximately fourfold less expansion over 4 weeks.
  • Demonstrated feasibility of controlling cell growth in both in vitro and in vivo (rat striatum implant) settings.
  • Successfully showed tunable, dose-controlled release of therapeutic molecules (neurotransmitters and CNTF) by encapsulated cells.

Conclusions:

  • The developed microcarrier-based cell encapsulation system effectively controls cell proliferation within implantable devices.
  • This method offers a viable strategy for sustained and dose-controllable delivery of therapeutic factors for neurodegenerative disease treatment.
  • The approach enhances the potential of cell therapy by addressing critical challenges in cell survival and controlled release.