Abstract:
OBJECTIVES:Despite the important role of the transcription factor HIF-1alpha in angiogenesis and inflammation, only a few studies on HIF-1alpha expression have been performed in RA patients. The aim of the present study was to identify the layer in synovial tissue of RA patients where HIF1a is expressed and to find out whether HIF-1alpha expression is related to both angiogenesis and inflammation in synovium from RA patients. METHODS:A reproducible staining method for HIF-1alpha was developed. HIF-1alpha -positive cells were quantified in synovial tissue from patients with RA. As control we used synovial tissue from patients with osteoarthritis (OA). The number of HIF-1alpha-positive cells was compared with the number of blood vessels present and was correlated with the amount of inflammation. The amount of inflammation was determined by counting inflammatory cells, by estimating the proliferation marker Ki67 in inflamed tissue, and by using a recently published synovitis score which gives an accurate estimate of the amount of inflammation present. RESULTS:HIF-1alpha was expressed weakly in the lining layer and strongly in the sublining layer in RA synovial tissue. In contrast, HIF-1alpha was only weakly expressed in OA synovial tissue. The number of HIF-1alpha -positive cells correlated strongly with the number of blood vessels in RA synovial tissue and with inflammatory endothelial cell infiltration (blood vessels), cell proliferation (Ki67) and the synovitis score. CONCLUSIONS:HIF-1alpha expression is strongest in the sub-lining layer of RA synovium and is related to both angiogenesis and inflammation in synovium from RA patients. These results thus suggest that HIF-1alpha could serve as an important new therapeutic target in RA, targeting both angiogenesis and inflammation.
journal_name
Clin Exp Rheumatoljournal_title
Clinical and experimental rheumatologyauthors
Brouwer E,Gouw AS,Posthumus MD,van Leeuwen MA,Boerboom AL,Bijzet J,Bos R,Limburg PC,Kallenberg CG,Westra Jsubject
Has Abstractpub_date
2009-11-01 00:00:00pages
945-51issue
6eissn
0392-856Xissn
1593-098Xpii
2845journal_volume
27pub_type
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journal_title:Clinical and experimental rheumatology
pub_type: 杂志文章,评审
doi:
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journal_title:Clinical and experimental rheumatology
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journal_title:Clinical and experimental rheumatology
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journal_title:Clinical and experimental rheumatology
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journal_title:Clinical and experimental rheumatology
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journal_title:Clinical and experimental rheumatology
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doi:
更新日期:2011-03-01 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 杂志文章,评审
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journal_title:Clinical and experimental rheumatology
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更新日期:2004-07-01 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 杂志文章
doi:
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journal_title:Clinical and experimental rheumatology
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doi:
更新日期:2021-01-11 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 杂志文章,评审
doi:
更新日期:2011-09-01 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 杂志文章,评审
doi:
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journal_title:Clinical and experimental rheumatology
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doi:
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doi:
更新日期:2014-11-01 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 历史文章,杂志文章,评审
doi:
更新日期:2014-01-01 00:00:00
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doi:
更新日期:2013-03-01 00:00:00
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journal_title:Clinical and experimental rheumatology
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doi:
更新日期:1991-09-01 00:00:00
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journal_title:Clinical and experimental rheumatology
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doi:
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journal_title:Clinical and experimental rheumatology
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更新日期:2008-01-01 00:00:00
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journal_title:Clinical and experimental rheumatology
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doi:
更新日期:2020-07-01 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 杂志文章
doi:
更新日期:2017-09-01 00:00:00
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journal_title:Clinical and experimental rheumatology
pub_type: 临床试验,杂志文章
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更新日期:2007-05-01 00:00:00
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journal_title:Clinical and experimental rheumatology
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更新日期:2004-01-01 00:00:00
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journal_title:Clinical and experimental rheumatology
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更新日期:2006-03-01 00:00:00
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