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Melatonin attenuates arsenic induced nephropathy via the regulation of oxidative stress and inflammatory signaling cascades in mice.

08:00 EDT 12th May 2018 | BioPortfolio

Summary of "Melatonin attenuates arsenic induced nephropathy via the regulation of oxidative stress and inflammatory signaling cascades in mice."

Arsenic is a potent inducer of several acute and chronic nephrotoxic disorders. It promotes deleterious phenomenon like oxidative stress, inflammation, cell death and altered glucose uptake leading to distorted kidney homeostasis that end up in chronic kidney disease. This study investigated the possible protective role of melatonin; a natural antioxidant produced by the pineal gland, against arsenic induced nephrotoxicity. Melatonin successfully ameliorated arsenic induced renal toxicity both in in vitro and in vivo models. Elevated BUN, creatinine, urine glucose and protein levels and altered renal histopathological conditions were observed in arsenic intoxicated mice. Significant oxidative stress induced damage of biomolecules along with downregulation in antioxidant enzymes and thiols were also detected in the kidney tissues of arsenic-intoxicated mice. These alterations along with mitochondrial dysfunction ultimately triggered TNFα mediated inflammatory and cell death cascades. Interestingly arsenic also led to disruption of glucose uptake in the kidney. These findings suggest that melatonin protects the kidney against toxic effect of arsenic, presumably through its antioxidant, anti-inflammatory and antidiabetic properties by inhibiting inflammatory outburst, apoptosis, necroptosis and stimulating glucose uptake. As melatonin is a natural antioxidant molecule, detailed pharmacokinetic and pharmacodynamic studies are expected to establish it as an effective nephro-protective agent in future.

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This article was published in the following journal.

Name: Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association
ISSN: 1873-6351
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Medical and Biotech [MESH] Definitions

A biogenic amine that is found in animals and plants. In mammals, melatonin is produced by the PINEAL GLAND. Its secretion increases in darkness and decreases during exposure to light. Melatonin is implicated in the regulation of SLEEP, mood, and REPRODUCTION. Melatonin is also an effective antioxidant.

A disturbance in the prooxidant-antioxidant balance in favor of the former, leading to potential damage. Indicators of oxidative stress include damaged DNA bases, protein oxidation products, and lipid peroxidation products (Sies, Oxidative Stress, 1991, pxv-xvi).

PKC beta encodes two proteins (PKCB1 and PKCBII) generated by alternative splicing of C-terminal exons. It is widely distributed with wide-ranging roles in processes such as B-cell receptor regulation, oxidative stress-induced apoptosis, androgen receptor-dependent transcriptional regulation, insulin signaling, and endothelial cell proliferation.

A forkhead box transcription factor and transcriptional activator which triggers type 1 programmed cell death (APOPTOSIS) in the absence of APOPTOSIS INHIBITING PROTEINS, including neuronal cell death induced by OXIDATIVE STRESS. It recognizes and binds to the DNA sequence 5'-(AG)TAAA(TC)A-3' and also functions in post-transcriptional regulation of the c-MYC PROTO-ONCOGENE.

A family of G-protein-coupled receptors that are specific for and mediate the effects of MELATONIN. Activation of melatonin receptors has been associated with decreased intracellular CYCLIC AMP and increased hydrolysis of PHOSPHOINOSITIDES.

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