| Effects of low glucose concentrations on oxygen consumption rates of intervertebral disc cells. | |
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MedLine Citation:
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PMID: 17762806 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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STUDY DESIGN: Investigation of the effects of low glucose concentrations on the oxygen consumption rates of intervertebral disc cells. OBJECTIVES: To determine the oxygen consumption rate of porcine anulus fibrosus (AF) cells at different glucose concentrations and to examine the differences in the oxygen consumption rate between AF and nucleus pulposus (NP) cells at different glucose levels. SUMMARY OF BACKGROUND DATA: Poor nutrient supply has been suggested as a potential mechanism for degeneration of the intervertebral disc (IVD). Distribution of nutrients in the IVD is strongly dependent on transport properties of the tissue and cellular metabolic rates. Previous studies have shown dependence of oxygen consumption rate of IVD cells on oxygen tension, pH levels, and glucose levels outside the physiologic range. However, the oxygen consumption rate of AF cells at in vivo glucose levels has not been investigated. METHODS: IVD cells were isolated from the outer AF and NP of 4- to 5-month-old porcine lumbar discs. The changes in oxygen tension were recorded when cells were cultured in sealed metabolism chamber. The oxygen consumption rate of cells was determined by theoretical curve fitting using the Michaelis-Menten equation. RESULTS: The outer AF cells cultured in high glucose medium (25 mmol/L) exhibited the lowest oxygen consumption rate, whereas no significant differences in oxygen consumption rates were found among outer AF cells cultured at physiologic glucose levels (i.e., 1 mmol/L, 2.5 mmol/L, 5 mmol/L). The oxygen consumption rate of NP cells was significantly greater than that of outer AF cells. CONCLUSION: Since the oxygen consumption rates determined in this study are comparable to the findings in the literature, this study has developed a new alternative method for determining oxygen consumption rate. The oxygen consumption rates of IVD cells reported in this study will be valuable for theoretically predicting local oxygen concentrations in IVD, which can provide a better understanding of transport of oxygen in the discs. |
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Authors:
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Chun-Yuh C Huang; Tai-Yi Yuan; Alicia R Jackson; Larry Hazbun; Christopher Fraker; Wei Yong Gu |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: Spine Volume: 32 ISSN: 1528-1159 ISO Abbreviation: Spine Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-08-31 Completed Date: 2007-09-18 Revised Date: 2011-05-05 |
Medline Journal Info:
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Nlm Unique ID: 7610646 Medline TA: Spine (Phila Pa 1976) Country: United States |
Other Details:
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Languages: eng Pagination: 2063-9 Citation Subset: IM |
Affiliation:
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College of Dental Medicine, Nova Southeastern University, Fort Lauderdale, FL, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cells, Cultured Dose-Response Relationship, Drug Glucose / metabolism*, pharmacology Intervertebral Disk / cytology, drug effects, metabolism* Lumbar Vertebrae Models, Biological Oxygen / metabolism* Oxygen Consumption* / drug effects Reproducibility of Results Swine |
| Grant Support | |
ID/Acronym/Agency:
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AR050609/AR/NIAMS NIH HHS; R01 AR050609-01A2/AR/NIAMS NIH HHS; R01 AR050609-02/AR/NIAMS NIH HHS |
| Chemical | |
Reg. No./Substance:
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50-99-7/Glucose; 7782-44-7/Oxygen |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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