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2015 ; 166
(5
): 485-501
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Marked protection against acute renal and hepatic injury after nitrited myoglobin
+ tin protoporphyrin administration
#MMPMID26117289
Zager RA
Transl Res
2015[Nov]; 166
(5
): 485-501
PMID26117289
show ga
The phenomenon known as renal "ischemic preconditioning," whereby an initial
ischemic insult induces resistance against subsequent kidney damage, has been
well established in the experimental literature. However, a clinically applicable
way to safely recapitulate this state has not been defined. We hypothesized that
a unique combination of agents (nitrited myoglobin [N-Mgb] + tin protoporphyrin
[SnPP]) can achieve these ends safely and synergistically, increasing
cytoprotective proteins (eg, heme oxygenase 1 [HO-1], interleukin 10 [IL-10], and
haptoglobin) in kidney cells. To test this hypothesis, CD-1 mice received 1 mg of
N-Mgb and 1 ?mol of SnPP, either alone or in combination. Renal cortical HO-1,
haptoglobin, and IL-10 gene expressions (messenger RNA [mRNA], protein levels)
were determined 4 and 18 hours later. Cytoresistance to 3 forms of acute kidney
injury (AKI; glycerol-induced rhabdomyolysis, maleate nephrotoxicity, and
postischemic AKI progression to chronic kidney disease [CKD]) was assessed. To
ascertain whether cytoresistance might emerge in extrarenal organs, hepatic HO-1,
IL-10, and haptoglobin levels were also measured, and resistance to 25 minutes of
hepatic ischemia-reperfusion injury and hepatotoxicity (intraperitoneal glycerol
injection) was sought. N-Mgb + SnPP induced additive or synergistic increases in
renal HO-1, haptoglobin, and IL-10 mRNA and protein levels (up to 20-fold)
without inducing any apparent renal or extrarenal damage. After 18 hours of
post-treatment, marked or complete protection against glycerol-induced AKI,
maleate-induced AKI, and postischemic AKI progression to CKD had emerged.
Combined N-Mgb + SnPP was more protective than either agent alone (assessed in
glycerol model). N-Mgb + SnPP also upregulated cytoprotective pathways in liver
and induced marked protection against both hepatic ischemia-reperfusion and toxic
liver damage. In conclusion, we posit that "preconditioning" with combined
administration of N-Mgb + SnPP represents a promising approach for protecting
against diverse forms of renal and nonrenal (hepatic) forms of tissue damage.
|Acute Kidney Injury/physiopathology/*prevention & control
[MESH]