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Pyrrolidine dithiocarbamate reduces the progression of total kidney volume and
cyst enlargement in experimental polycystic kidney disease
#MMPMID25501440
Ta MH
; Rao P
; Korgaonkar M
; Foster SF
; Peduto A
; Harris DC
; Rangan GK
Physiol Rep
2014[Dec]; 2
(12
): ? PMID25501440
show ga
Heterocyclic dithiocarbamates have anti-inflammatory and anti-proliferative
effects in rodent models of chronic kidney disease. In this study, we tested the
hypothesis that pyrrolidine dithiocarbamate (PDTC) reduces the progression of
polycystic kidney disease (PKD). Male Lewis polycystic kidney (LPK) rats (an
ortholog of Nek8/NPHP9) received intraperitoneal injections of either saline
vehicle or PDTC (40 mg/kg once or twice daily) from postnatal weeks 4 until 11.
By serial magnetic resonance imaging at weeks 5 and 10, the relative within-rat
increase in total kidney volume and cyst volume were 1.3-fold (P = 0.01) and
1.4-fold (P < 0.01) greater, respectively, in LPK + Vehicle compared to the LPK +
PDTC(40 mg/kg twice daily) group. At week 11 in LPK rats, PDTC attenuated the
increase in kidney weight to body weight ratio by 25% (P < 0.01) and proteinuria
by 66% (P < 0.05 vs. LPK + Vehicle) but did not improve renal dysfunction. By
quantitative whole-slide image analysis, PDTC did not alter interstitial CD68+
cell accumulation, interstitial fibrosis, or renal cell proliferation in LPK rats
at week 11. The phosphorylated form of the nuclear factor (NF)-?B subunit, p105,
was increased in cystic epithelial cells of LPK rats, but was not altered by
PDTC. Moreover, PDTC did not significantly alter nuclear expression of the p50
subunit or NF-?B (p65)-DNA binding. Kidney enlargement in LPK rats was resistant
to chronic treatment with a proteasome inhibitor, bortezomib. In conclusion, PDTC
reduced renal cystic enlargement and proteinuria but lacked anti-inflammatory
effects in LPK rats.