• Acta Pharmacol. Sin. · Sep 2004

    Anti-adjuvant arthritis of recombinant human endostatin in rats via inhibition of angiogenesis and proinflammatory factors.

    • Li Yue, Hua Wang, Li-Hua Liu, Yu-Xian Shen, and Wei Wei.
    • Institute of Clinical Pharmacology, Anhui Medical University, Hefei 230032, China.
    • Acta Pharmacol. Sin. 2004 Sep 1; 25 (9): 1182-5.

    AimTo investigate the profile of endostatin on adjuvant arthritis (AA) and angiogenesis blockade in synovitis.MethodsThe model of rat AA was induced by injection of intradermal complete Freund's adjuvant (CFA). Hind paw volume of rat was measured by volume meter and the activities of interleukin-1 (IL-1) and IL-2 were measured by the assay of thymocytes proliferation. IL-1beta and tumor necrosis factor-alpha (TNF-alpha) produced by synoviocytes was estimated with radioimmunoassay. The number of new blood vessels in knee joint synovium was counted under microscope by hematoxylin and eosin (HE) staining.ResultsThe secondary inflammation of AA rats appeared on the 10th day after injection of CFA. The therapeutic administration of endostatin (0.1, 0.5, and 2.5 mg/kg/d, sc, plus 7 d) was given from that time (d 10). It was found that endostatin significantly inhibited the secondary paw swelling and the number of new blood vessels in the synovium of AA rats. Endostatin significantly decreased the production of IL-1 derived from both peritoneal macrophages and synoviocytes and IL-2 from splenocytes, especially at the dose of 2.5 mg/kg. This effect of endostatin also was seen on TNF-alpha produced by synoviocytes.ConclusionThe recombinant human endostatin had an inhibitory effect on rat AA, which was related to its anti-angiogenesis and inhibition of proinflammatory cytokines.

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