Photosynthetic Oxygen Generator for Bioartificial Pancreas
Abstract
Immunoisolation of pancreatic islets interrupts their vascular connections and results in severe cell hypoxia and dysfunction. This process is believed to be the major obstacle to a successful cure of diabetes by implantation of bioartificial pancreas. Here we describe a new technology for microalga-based, photosynthetic oxygen supply to encapsulated islets, in which a thermophylic strain of the unicellular alga Chlorella was used as a natural photosynthetic oxygen generator. Following determinations of the optimal number of alga cells required for compensation of islet respiration, an appropriate number of islets and algae were co-encapsulated in alginate and perifused with oxygen-free medium at increasing glucose concentrations. No insulin response to glucose was obtained in islets alone, or upon inactivation of photosynthesis by darkness. However, under illumination, photosynthetic- dependent oxygen generation induced higher glucose-stimulated insulin response when compared to normoxic perifusion. Such photosynthetic oxygen generation may have a potential application in development of various bioartificial tissues, in particular the endocrine pancreas.
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A breathing biohybrid material incorporating C. sorokiniana into an engineered bioartificial pancreas generated O2 that compensated for the O2 requirements of encapsulated mouse pancreatic islets and provided proper insulin secretion.
“The O2 generated by C. sorokiniana compensated for the O2 requirements of encapsulated mouse pancreatic islets and provided proper insulin secretion.”
From Emerging Applications of Chlorella sp. and Spirulina (Arthrospira) sp. (2023) · cites this paper as [120]
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- Authors
- Bloch, K., Papismedov, E., Yavriyants, K., Vorobeychik, M., Beer, S., & Vardi, P.
- Affiliations
- Tel Aviv University (IL)
- Beta-O2 Technologies (Israel) (IL)
- ORCID
- Bloch, Konstantin
- Venue
- Tissue Engineering
- Publisher
- SAGE Publications
- Published
- 2006-02
- Volume
- 12
- Issue
- 2
- Pages
- 337-344
- ISSN
- 1076-3279 (ISSN-L)
- 1557-8690
- OpenAlex
- W2064049827
- Cited by
- 84
- References
- 34
- Citations by year
- 2026: 3 · 2025: 12 · 2024: 4 · 2023: 9 · 2022: 8 · 2021: 5 · 2020: 4 · 2019: 8 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 2 · 2014: 3 · 2013: 4 · 2012: 3
- FWCI
- 1.02
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Tissue Engineering (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
- Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme Catalysis and Immobilization
- Keywords
- bioartificial pancreas, Chlorella, microalgae, pancreatic islets, immunoisolation, alginate encapsulation, glucose-stimulated insulin secretion, diabetes mellitus, co-encapsulation, perifusion, photobioreactors
- MeSH terms
- Insulin Secretion, Alginates, Animals, Cells, Cultured, Chlorella, Germ-Free Life, Hexuronic Acids, Insulin, Insulinoma, Islets of Langerhans, Male, Mice, Inbred ICR, Oxygen, Oxygen Consumption, Pancreatic Neoplasms, Perfusion, Photosynthesis, Collagenases, Photons, Pancreas, Artificial, Glucuronic Acid, Mice
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