Abstract:
BACKGROUND:Vascular inflammation and subsequent matrix degradation play an important role in the development of atherosclerosis. We previously reported that adiponectin, an adipose-specific plasma protein, accumulated to the injured artery and attenuated vascular inflammatory response. Clinically, high plasma adiponectin level was associated with low cardiovascular event rate in patients with chronic renal failure. The present study was designed to elucidate the effects of adiponectin on matrix metalloproteinases (MMPs) and tissue inhibitor of metalloproteinases (TIMPs) in human monocyte-derived macrophages. METHODS AND RESULTS:Human monocyte-derived macrophages were incubated with the physiological concentrations of human recombinant adiponectin for the time indicated. Adiponectin treatment dose-dependently increased TIMP-1 mRNA levels without affecting MMP-9 mRNA levels. Adiponectin also augmented TIMP-1 secretion into the media, whereas MMP-9 secretion and activity were unchanged. Time course experiments indicated that TIMP-1 mRNA levels started to increase at 24 hours of adiponectin treatment and were significantly elevated at 48 hours. Adiponectin significantly increased interleukin-10 (IL-10) mRNA expression at the transcriptional level within 6 hours and significantly increased IL-10 protein secretion within 24 hours. Cotreatment of adiponectin with anti-IL-10 monoclonal antibody completely abolished adiponectin-induced TIMP-1 mRNA expression. CONCLUSIONS:Adiponectin selectively increased TIMP-1 expression in human monocyte-derived macrophages through IL-10 induction. This study identified, for the first time, the adiponectin/IL-10 interaction against vascular inflammation.
journal_name
Circulationjournal_title
Circulationauthors
Kumada M,Kihara S,Ouchi N,Kobayashi H,Okamoto Y,Ohashi K,Maeda K,Nagaretani H,Kishida K,Maeda N,Nagasawa A,Funahashi T,Matsuzawa Ydoi
10.1161/01.CIR.0000127953.98131.EDsubject
Has Abstractpub_date
2004-05-04 00:00:00pages
2046-9issue
17eissn
0009-7322issn
1524-4539pii
01.CIR.0000127953.98131.EDjournal_volume
109pub_type
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