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Abstract Stimuli–responsive biomaterials may be used to better control the release of bioactive molecules or cells for applications involving drug delivery and controlled cell release. In this study, we developed a Factor Xa (FXa)‐responsive biomaterial capable of controlled release of pharmaceutical agents and cells from in vitro culture. FXa‐cleavable substrates were formed as hydrogels that degraded in response to FXa enzyme over several hours. Hydrogels were shown to release both heparin and a model protein in response to FXa. Additionally, RGD‐functionalized FXa‐degradable hydrogels were used to culture mesenchymal stromal cells (MSCs), enabling FXa‐mediated cell dissociation from hydrogels in a manner that preserved multicellular structures. Harvesting MSCs using FXa‐mediated dissociation did not influence their differentiation capacity or indoleamine 2,3‐dioxygenase (IDO) activity (a measure of immunomodulatory capacity). In all, this FXa‐degradable hydrogel is a novel responsive biomaterial system that may be used for on‐demand drug delivery, as well as for improving processes for in vitro culture of therapeutic cells.
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Advances in sensor developments for cell culture monitoring
Abstract Cell culture encompasses procedures for extracting cells from their natural tissue and cultivating them under controlled artificial conditions. During this process, various factors, including cell physiological/morphological properties, culture environments, metabolites, and contaminants, have to be precisely controlled and monitored for the survival of cells and the pursuit of the desired properties of the cells. This review summarizes recent advances in sensor technologies and manufacturing strategies for various cell culture platforms using traditional plastics, microfluidic chips, and scalable bioreactors. We share the details of newly developed biological sensors, chemical sensors, optical sensors, electronic chip technologies, and material integration methods. The precise control of parameters based on the feedback by these sensors and electronics enhances cell culture quality and throughput.
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- Award ID(s):
- 1648035
- PAR ID:
- 10478529
- Publisher / Repository:
- Wiley Blackwell (John Wiley & Sons)
- Date Published:
- Journal Name:
- BMEMat
- Volume:
- 1
- Issue:
- 4
- ISSN:
- 2751-7438
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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