Dose-dependent mercuric chloride tubular injury in rat kidney.

Abstract:

:Mercuric chloride (HgCl(2)) produces an acute renal failure in experimental animal models. Since the mechanism of tubular injury has not completely been clarified, this morpho-quantitative study was undertaken to better understand the effects of 2 sublethal doses (T1=1 mg/kg and T3.5=3.5 mg/kg) of HgCl(2) in rat proximal tubules. Morphometrical analysis was performed to quantify both cytoplasmic and nuclear changes found in treated in respect to saline-injected proximal tubules. In the controls, single-cell damage was occasional and nucleolar changes were absent. HgCl(2) induced progressively severe proximal tubule atrophy. In the T1 group, necrosis was limited to pars recta cells and nucleolar segregation was often partial. In the T3.5 group, atrophy was extensive in both convoluted and straight tracts, the nucleolus was completely segregated and coiled body-like inclusions were detached from it. Ultrastructural analysis confirmed dose-dependent changes within straight proximal tubules, i.e., necrosis, apoptosis, nucleolar segregation, swollen mitochondria, vacuolization, and disrupted brush border. In conclusion, in the rat kidney HgCl(2) induced dose-dependent alterations not only in the cytoplasm but also in the nucleus of proximal tubule cells. These findings will be useful for better understanding of the pathogenesis of mercury nephrotoxicity and its genotoxic effect.

journal_name

Ultrastruct Pathol

authors

Stacchiotti A,Borsani E,Rodella L,Rezzani R,Bianchi R,Lavazza A

doi

10.1080/01913120309921

subject

Has Abstract

pub_date

2003-07-01 00:00:00

pages

253-9

issue

4

eissn

0191-3123

issn

1521-0758

pii

V7JT80R0VTLP57T6

journal_volume

27

pub_type

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