Nicotinamide riboside regulates inflammation and mitochondrial markers in AML12 hepatocytes
Nutrition Research and Practice
;
: 3-10, 2019.
Article
in English
| WPRIM
| ID: wpr-741700
ABSTRACT
BACKGROUND/OBJECTIVES:
The NAD+ precursor nicotinamide riboside (NR) is a type of vitamin B3 found in cow's milk and yeast-containing food products such as beer. Recent studies suggested that NR prevents hearing loss, high-fat diet-induced obesity, Alzheimer's disease, and mitochondrial myopathy. The objective of this study was to investigate the effects of NR on inflammation and mitochondrial biogenesis in AML12 mouse hepatocytes. MATERIALS/METHODS:
A subset of hepatocytes was treated with palmitic acid (PA; 250 µM) for 48 h to induce hepatocyte steatosis. The hepatocytes were treated with NR (10 µM and 10 mM) for 24 h with and without PA. The cell viability and the levels of sirtuins, inflammatory markers, and mitochondrial markers were analyzed.RESULTS:
Cytotoxicity of NR was examined by PrestoBlue assay. Exposure to NR had no effect on cell viability or morphology. Gene expression of sirtuin 1 (Sirt1) and Sirt3 was significantly upregulated by NR in PA-treated hepatocytes. However, Sirt1 activities were increased in hepatocytes treated with low-dose NR. Hepatic pro-inflammatory markers including tumor necrosis factor-alpha and interleukin-6 were decreased in NR-treated cells. NR upregulated anti-inflammatory molecule adiponectin, and, tended to down-regulate hepatokine fetuin-A in PA-treated hepatocytes, suggesting its inverse regulation on these cytokines. NR increased levels of mitochondrial markers including peroxisome proliferator-activated receptor γ coactivator-1α, carnitine palmitoyltransferase 1, uncoupling protein 2, transcription factor A, mitochondrial and mitochondrial DNA in PA-treated hepatocytes.CONCLUSIONS:
These data demonstrated that NR attenuated hepatic inflammation and increased levels of mitochondrial markers in hepatocytes.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Transcription Factors
/
Beer
/
Organelle Biogenesis
/
DNA, Mitochondrial
/
Carnitine O-Palmitoyltransferase
/
Gene Expression
/
Cell Survival
/
Cytokines
/
Interleukin-6
/
Tumor Necrosis Factor-alpha
Limits:
Animals
Language:
English
Journal:
Nutrition Research and Practice
Year:
2019
Type:
Article
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