Hypoxia inducible factor-1-alpha (HIF-1α) is related to both angiogenesis and inflammation in rheumatoid arthritis

被引:7
作者
Brouwer, E. [1 ]
Gouw, A. S. H.
Posthumus, M. D. [1 ]
van Leeuwen, M. A. [1 ]
Boerboom, A. L. [2 ]
Bijzet, J. [1 ]
Bos, R. [1 ]
Limburg, P. C. [3 ]
Kallenberg, C. G. M. [1 ]
Westra, J. [1 ]
机构
[1] Univ Groningen, Univ Med Ctr Groningen, Dept Rheumatol & Clin Immunol, NL-9713 GZ Groningen, Netherlands
[2] Univ Groningen, Univ Med Ctr Groningen, Dept Orthopaed, NL-9713 GZ Groningen, Netherlands
[3] Univ Groningen, Univ Med Ctr Groningen, Dept Lab Med, NL-9713 GZ Groningen, Netherlands
关键词
HIF-1; alpha; vessels; inflammation; rheumatoid arthritis; osteoarthritis; SYNOVIAL TISSUE; VASCULAR MORPHOLOGY; GENE-EXPRESSION; HUMAN CANCERS; MACROPHAGES; BIOMARKER; FIBROBLASTS; ACTIVATION; PATHWAY; JOINT;
D O I
暂无
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objectives Despite the important role of the transcription factor HIF-1 alpha in angiogenesis and inflammation, only a few studies on HIF-1 alpha 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 HIF1 alpha is expressed and to find out whether HIF-1 alpha expression is related to both angiogenesis and inflammation in synovium from. RA patients. Methods A reproducible staining method for HIF-1 alpha was developed. HIF-1 alpha-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-1 alpha-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-1 alpha was expressed weakly in the lining layer and strongly in the sublining layer in RA synovial tissue. In contrast, HIF-1 alpha was only weakly expressed in OA synovial tissue. The number of HIF-1 alpha-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-1 alpha 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-1 alpha could serve as an important new therapeutic target in RA, targeting both angiogenesis and inflammation.
引用
收藏
页码:945 / 951
页数:7
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