Alginate-Coated Collagen Hydrogel Tubes for Scalable Cell and Biotherapeutic Particle Manufacturing

Area of Science:

• Biotechnology
• Biomaterials Engineering
• Cell Culture Technology

Background:

• Mammalian cell and biotherapeutic particle production faces challenges in scalability, cost-effectiveness, and efficiency.
• Existing 2D and 3D culture systems have limitations including low yields and high costs.
• Previous collagen hydrogel tube microbioreactors (ColTubes) showed promise but had issues with adhesion and cell leakage, hindering scalability.

Purpose of the Study:

• To engineer an improved microbioreactor system overcoming the limitations of previous ColTubes.
• To develop a scalable, cost-effective platform for high-density cell culture and bioparticle production.
• To create a novel biomaterial enabling continuous release of biotherapeutic particles.

Main Methods:

• Development of AlgColTubes by coating collagen hydrogel tubes with an ionically crosslinked alginate layer.
• Characterization of the alginate coating using scanning electron microscopy to confirm interpenetrating hydrogel network formation.
• Assessment of AlgColTubes' structural integrity, cell viability, proliferation, and bioparticle release under various culture conditions.

Main Results:

• AlgColTubes exhibit a stable, tunable alginate coating that prevents tube-tube and tube-vessel adhesion, and exogenous cell attachment.
• Cell viability and proliferation in AlgColTubes are comparable to uncoated ColTubes.
• Truncated AlgColTubes enable continuous, segment length-dependent release of biotherapeutic particles like lentivirus, achieving high efficiency.

Conclusions:

• AlgColTubes offer a scalable and cost-effective solution for high-yield cell and bioparticle manufacturing.
• The unique adhesive interior and non-adhesive exterior of AlgColTubes enhance bioprocessing capabilities.
• This technology has broad potential applications in basic research, translational studies, and industrial bioprocessing.