| An in vitro system to evaluate the effects of ischemia on survival of cells used for cell therapy. | |
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MedLine Citation:
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PMID: 17417737 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Maintaining cell viability is a major challenge associated with transplanting cells into ischemic myocardium to restore function. A likely contributor to significant cell death during cardiac cell therapy is hypoxia/anoxia. We developed a system that enabled quantification and association of cell survival with oxygen and nutrient values within in vitro constructs. Myoblasts were suspended in 2% collagen gels in 1 cm diameter x 1 cm deep constructs. At 48 +/- 3 h post-seeding, oxygen levels were measured using microelectrodes and gels were snap-frozen. Bioluminescence metabolite imaging and TUNEL staining were performed on cryosections. Oxygen and glucose consumption and lactate production rates were calculated by fitting data to Fick's second law of diffusion with Michaelis-Menten kinetics. Oxygen levels dropped to 0 mmHg and glucose levels dropped from 4.28 to 3.18 mM within the first 2000 mum of construct depth. Cell viability dropped to approximately 40% over that same distance and continued to drop further into the construct. We believe this system provides a reproducible and controllable test bed to compare survival, proliferation, and phenotype of various cell inputs (e.g., myoblasts, mesenchymal stem cells, and cardiac stem cells) and the impact of different treatment regimens on the likelihood of survival of transplanted cells. |
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Authors:
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Bryce H Davis; Thies Schroeder; Pavel S Yarmolenko; Farshid Guilak; Mark W Dewhirst; Doris A Taylor |
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Publication Detail:
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Type: In Vitro; Journal Article; Research Support, N.I.H., Extramural Date: 2007-04-07 |
Journal Detail:
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Title: Annals of biomedical engineering Volume: 35 ISSN: 0090-6964 ISO Abbreviation: Ann Biomed Eng Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-07-16 Completed Date: 2007-09-26 Revised Date: 2007-12-03 |
Medline Journal Info:
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Nlm Unique ID: 0361512 Medline TA: Ann Biomed Eng Country: United States |
Other Details:
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Languages: eng Pagination: 1414-24 Citation Subset: IM |
Affiliation:
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Department of Biomedical Engineering, Duke University, Durham, NC, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Anoxia Cell Survival Collagen Type I / metabolism Glucose / metabolism* Lactic Acid / metabolism Mesenchymal Stem Cells / physiology Muscle, Skeletal / cytology, physiology* Myoblasts, Cardiac / physiology*, transplantation Myocardial Ischemia* Oxygen Consumption / physiology* Swine Tissue Transplantation |
| Grant Support | |
ID/Acronym/Agency:
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HL-63703/HL/NHLBI NIH HHS; R-01 HL-63346/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Collagen Type I; 50-21-5/Lactic Acid; 50-99-7/Glucose |
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