| First Author | Schaefer L | Year | 2002 |
| Journal | Am J Pathol | Volume | 160 |
| Issue | 3 | Pages | 1181-91 |
| PubMed ID | 11891213 | Mgi Jnum | J:75298 |
| Mgi Id | MGI:2176294 | Doi | 10.1016/S0002-9440(10)64937-1 |
| Citation | Schaefer L, et al. (2002) Absence of decorin adversely influences tubulointerstitial fibrosis of the obstructed kidney by enhanced apoptosis and increased inflammatory reaction. Am J Pathol 160(3):1181-91 |
| abstractText | Decorin, a small dermatan-sulfate proteoglycan, participates in extracellular matrix assembly and influences directly and indirectly cell behavior via interactions with signaling membrane receptors and transforming growth factor (TGF)-beta. We have therefore compared the development of tubulointerstitial kidney fibrosis in wild-type (WT) and decorin-/- mice in the model of unilateral ureteral obstruction. Without obstruction, kidneys from decorin-/- mice did not differ in any aspect from their WT counterparts. However, already 12 hours after obstruction decorin-/- animals showed lower levels of p27(KIP1) and soon thereafter a more pronounced up-regulation and activation of initiator and effector caspases followed by enhanced apoptosis of tubular epithelial cells. Later, a higher increase of TGF-beta1 became apparent. After 7 days, there was an up to 15-fold transient up-regulation of the related proteoglycan biglycan, which was mainly caused by the appearance of biglycan-expressing mononuclear cells. Other small proteoglycans showed no similar response. Because of enhanced degradation of type I collagen, end-stage kidneys from decorin-/- animals were more atrophic than WT kidneys. These data suggest that decorin exerts beneficial effects on tubulointerstitial fibrosis, primarily by influencing the expression of a key cyclin-dependent kinase inhibitor and by limiting the degree of apoptosis, mononuclear cell infiltration, tubular atrophy, and expression of TGF-beta1. |
