Selectins mediate macrophage infiltration in obstructive nephropathy in newborn mice - PubMed (original) (raw)
Selectins mediate macrophage infiltration in obstructive nephropathy in newborn mice
Bärbel Lange-Sperandio et al. Kidney Int. 2002 Feb.
Free article
Abstract
Background: Urinary tract obstruction during development leads to tubular atrophy and causes interstitial fibrosis. Macrophage infiltration into the interstitium plays a central role in this process. Selectins, a family of three adhesion molecules, are involved in leukocyte recruitment to sites of inflammation and immune activity. We investigated the role of selectins in obstructive nephropathy in newborn mice.
Methods: Triple selectin-deficient mice (EPL-/-), L-selectin deficient mice (L-/-) and wild type mice (WT) were subjected to complete unilateral ureteral obstruction (UUO) or sham operation within the first 48 hours of life, and were sacrificed 5 and 12 days later. Kidneys were removed, and sections were stained for macrophage infiltration (mAb F4/80), apoptosis (TUNEL), tubular atrophy (periodic acid-Schiff) and interstitial fibrosis (Masson trichrome).
Results: Selectin deficient mice showed a marked reduction in macrophage infiltration into the obstructed kidney compared to WT at day 5 and day 12 after UUO. Tubular apoptosis was strongly reduced in EPL-/- at day 5 after UUO, and in EPL-/- and L-/- at day 12 after UUO when compared to WT. The number of apoptotic tubular cells was correlated with macrophage infiltration, suggesting that macrophages stimulate tubular apoptosis in obstructive nephropathy. In addition, tubular atrophy and interstitial fibrosis were significantly diminished in EPL-/- and L-/- compared to WT at day 12 after UUO.
Conclusion: Following UUO, selectins mediate macrophage infiltration into the obstructed kidney, which in turn may induce tubular apoptosis, tubular atrophy and interstitial fibrosis.
Comment in
- Macrophage-mediated renal cell death.
Kipari T, Hughes J. Kipari T, et al. Kidney Int. 2002 Feb;61(2):760-1. doi: 10.1046/j.1523-1755.2002.00180.x. Kidney Int. 2002. PMID: 11849421 Review. No abstract available.
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