Abstract：
BACKGROUND:Plasmin has recently been reported to be associated with renal fibrosis in experimental models, but its role in human renal diseases is unclear. METHODS:Fifty-seven patients with IgA nephropathy (IgAN) were evaluated retrospectively. Plasmin in their renal biopsy tissues was assessed by in situ zymography using a plasmin-sensitive synthetic peptide, and the relationships between patients' histologic or clinical parameters and their renal plasmin activity [assessed semiquantitatively by calculating the positively stained percentage of the total tubulointerstitial (TI) area] were evaluated. RESULTS:Plasmin activity was observed almost exclusively in the TI space (mainly in the interstitium and partly in the tubular epithelial cells) and was significantly stronger in patients with TI lesion (tubular atrophy/interstitial fibrosis and tubulointerstitial inflammation) than in those without TI lesion. It was significantly and positively correlated with the global glomerulosclerosis rate and significantly and negatively correlated with estimated glomerular filtration rate not only at the time of renal biopsy but also at the end of the follow-up period. Double stainings for plasmin activity and inflammatory cells, cytokeratin, or α-smooth muscle actin (α-SMA) in selected patients revealed TI infiltration of inflammatory cells, attenuated tubular epithelial expression of cytokeratin, and augmented interstitial expression of α-SMA close to upregulated plasmin activity in the TI space. CONCLUSIONS:These data suggest that TI plasmin is associated with TI inflammation leading to renal fibrosis, and can cause the decline in renal function seen in patients with IgAN. Reducing plasmin in situ may therefore be a promising therapeutic approach slowing renal fibrogenesis and improving renal function.
journal_name
J Nephroljournal_title
Journal of nephrologyauthors
Uchida T,Oda T,Takechi H,Matsubara H,Watanabe A,Yamamoto K,Oshima N,Sakurai Y,Kono T,Shimazaki H,Tamai S,Kumagai Hdoi
10.1007/s40620-015-0205-1subject
Has Abstractpub_date
2016-02-01 00:00:00pages
53-62issue
1eissn
1121-8428issn
1724-6059pii
10.1007/s40620-015-0205-1journal_volume
29pub_type
杂志文章abstract：:Thales was born into a noble family of Phoenician origin at the time of the 25th Olympiad (floruit 585 bc; he was 40 in the year of the solar eclipse. He had no teachers but had occasion to learn from Egyptian priests. He developed into a scholar and politician very much appreciated by Heraclitus, Herodotus and Democr...
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