Increased circulating
peroxiredoxin-4 in sepsis model rats involves secretion from hepatocytes and is mitigated by GYY4137.
J Toxicol Pathol 2019;
32:305-310. [PMID:
31719759 PMCID:
PMC6831490 DOI:
10.1293/tox.2019-0030]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/25/2019] [Indexed: 12/26/2022] Open
Abstract
Circulating peroxiredoxin-4 (Prx4) is suggested as a prognosis marker as well as a
regulator of many diseases. We aimed to examine 1) whether Prx4 is secreted from the liver
in an animal model of sepsis and 2) effects of GYY4137, a hydrogen sulfide donor molecule,
on septic liver injury as well as the hepatic secretion of Prx4. Rats (Wistar, male, 6
weeks old) were administered lipopolysaccharide (LPS, 15 mg/kg body weight, i.p.) with or
without pre-administration of GYY4137 (50 mg/kg body weight, i.p.) and sacrificed 24 h
after LPS administration. Hematoxylin-eosin and Elastica Masson-Goldner stains were used
to evaluate hepatic injuries. Cytokine expression levels were determined by qPCR, and the
levels of Prx4 in the serum and liver were determined by immunoblotting. Hepatocytes were
isolated from rat liver, and the levels of Prx4 in the medium as well as the cells were
determined 24 h after the administrations of LPS (1 µg/ml), tumor necrosis factor-α (TNFα,
50 ng/ml), or interleukin-1β (IL-1β, 10 ng/ml), with or without GYY4137 (300 µM). Hepatic
inflammation and damage in LPS-administered rats were suppressed by GYY4137. An increase
in plasma Prx4 level caused by LPS was observed, but the increase was attenuated by
pre-administration of GYY4137. Prx4 was secreted from isolated hepatocytes after
stimulation with LPS, TNFα, or IL-1β. GYY4137 attenuated the IL-1β-induced Prx4 secretion
from hepatocytes. Secretion from hepatocytes is likely involved in the increase in
circulating Prx4 during sepsis. GYY4137 attenuates not only hepatic injury but also Prx4
secretion.
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