| Efficacy and mechanisms of action of vitamin D in experimental polyarthritis. | |
MedLine Citation:
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PMID: 21445089 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Vitamin D (vit D) status has been linked to the occurrence and severity of auto-immune and inflammatory diseases. This study evaluates the effects of vit D status on adoptive transfer of adjuvant-induced arthritis (ATA). Rats maintained on diets replete or deficient in vit D3 received arthritogenic thoracic duct cells and were monitored for severity of arthritis. CD45(+) cells obtained by collagenase digestion of hind-paw synovium-rich tissues (SRTs) were analysed to observe the effects of dietary vit D3 on the inflammatory process. Arthritis was more severe in vitamin D-deficient (vit-D(-)) rats compared with vitamin D-replete (vit-D(+)) rats. Resolution was delayed in vit-D(-) rats compared with vit-D(+) rats, or rats fed standard chow. During the acute phase of ATA, numbers of CD45(+) cells were significantly increased in the SRTs of vit-D(-) rats compared with vit-D(+) rats. This increase involved T-cells, polymorphonuclear leukocytes, macrophages, dendritic cells (DCs) and MHC II(hi) cells that resemble activated monocytes. A major difference between the dietary groups was that most DCs at the peak of inflammation in vit-D(-) rats were CD4(-), whereas in convalescent vit-D(+) rats most expressed CD4. Multiple categories of genes expressed by DCs differed between deficient and replete rats, with deficiency being associated with relative upregulation of certain pro-inflammatory genes and replete status being associated with upregulation of genes associated with resolution of inflammation. The findings indicate that ATA is more severe and prolonged in vit-D deficiency, that vit-D deficiency promotes accumulation of CD4(-) DCs in synovium during ATA and that a gene-expression profile is likely to contribute to the observed increased severity and duration of arthritis.Immunology and Cell Biology advance online publication, 29 March 2011; doi:10.1038/icb.2011.22. |
Authors:
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Mahin Moghaddami; Graham Mayrhofer; Paul H Anderson; Howard A Morris; Mark Van Der Hoek; Leslie G Cleland |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-29 |
Journal Detail:
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Title: Immunology and cell biology Volume: - ISSN: 1440-1711 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-29 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8706300 Medline TA: Immunol Cell Biol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Arthritis Research Laboratory, Hanson Institute, SA Pathology, Adelaide, South Australia, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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