Abstract:
:The distribution and composition of endogenous lipids in articular cartilage and transport of exogenous fatty acids have been investigated on a microscopic scale in fresh bovine articular cartilage. To investigate the distribution and composition of the endogenous lipids, hyperspectral Raman maps were taken of chondrocytes and their surrounding matrix in both the deep and superficial zones. These revealed differences in both lipid distribution and composition between the two zones. Extracellular lipid was observed surrounding the cells in the superficial zone but not in the deep zone. Additionally, intracellular lipid droplets were observed that were larger and more numerous in the deep zone (P = 0.01). The extracellular lipid was primarily free saturated fatty acid, whereas the cellular lipid droplets contained triglycerides with unsaturated fatty acid chains. Fatty acid uptake and transport were investigated by incubating cartilage samples in Dulbecco's modified Eagle's medium containing fluorescently labelled palmitate for a range of times and temperatures. After incubation, the palmitate distribution was imaged using confocal microscopy. Palmitate accumulated preferentially in the territorial matrix only in the superficial zone where the concentration was up to 100-fold greater than that in the bulk matrix (P = 0.001). Palmitate uptake by the chondrocytes in both zones showed differential temperature sensitivity (P = 0.05), which would support the idea that cells take up palmitate by both active and passive mechanisms. The study reveals large differences between chondrocytes in the superficial and deep zones in their lipid content, in their extracellular lipid environment and in their access to exogenous fatty acids.
journal_name
J Anatjournal_title
Journal of anatomyauthors
Mansfield JC,Winlove CPdoi
10.1111/joa.12624subject
Has Abstractpub_date
2017-07-01 00:00:00pages
156-166issue
1eissn
0021-8782issn
1469-7580journal_volume
231pub_type
杂志文章abstract::The number of large neurons in the lateral vestibular nucleus of the mouse brain decreases in number after 25 months of age, from 488 at 25 months to 298 at 31 months. The number of small neurons in the nucleus remains constant up to 31 months of age. Large neurons accumulate lipofuscin from 25 months and their mean n...
journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
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journal_title:Journal of anatomy
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1979-12-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1983-03-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:2017-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1986-08-01 00:00:00
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journal_title:Journal of anatomy
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journal_title:Journal of anatomy
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doi:
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
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journal_title:Journal of anatomy
pub_type: 杂志文章
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