Abstract:
:Endostatin (EST), an antiangiogenic factor, is enriched in aging kidneys. EST is also an interactive partner of transglutaminase 2 (TG2), an enzyme that cross-links extracellular matrix proteins. Here we tested whether EST and TG2 play a role in the fibrosis of aging. In wild-type mice, aging kidneys exhibited a 2- to 4-fold increase in TG2 paralleled by increased cross-linked extracellular matrix proteins and fibrosis. Mice transgenic to express EST showed renal fibrosis at a young age. One-month delivery of EST via minipumps to young mice showed increased renal fibrosis that became more robust when superimposed on folic acid-induced nephropathy. Upregulated TG2 and impaired renal function were apparent with EST delivery combined with folic acid-induced nephropathy. Subcapsular injection of TG2 and/or EST into kidneys of young mice not only induced interstitial fibrosis, but also increased the proportion of senescent cells. Thus, kidney fibrosis in aging may represent a natural outcome of upregulated EST and TG2, but more likely it appears to be a result of cumulative stresses occurring on the background of synergistically acting geronic (aging) proteins, EST and TG2.
journal_name
Kidney Intjournal_title
Kidney internationalauthors
Lin CH,Chen J,Zhang Z,Johnson GV,Cooper AJ,Feola J,Bank A,Shein J,Ruotsalainen HJ,Pihlajaniemi TA,Goligorsky MSdoi
10.1016/j.kint.2016.01.030subject
Has Abstractpub_date
2016-06-01 00:00:00pages
1281-92issue
6eissn
0085-2538issn
1523-1755pii
S0085-2538(16)00362-8journal_volume
89pub_type
杂志文章abstract::In organ transplantation, ischemia/reperfusion (I/R) results in damage that may affect cell viability and lead to organ failure. I/R injury involves a complex cascade of events, including loss of energy, derangement of the ionic hemostasis, production of reactive oxygen species, and cell death. In this context, mitoch...
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pub_type: 杂志文章
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pub_type: 评论,杂志文章
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journal_title:Kidney international
pub_type: 杂志文章
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