Abstract
Adipose tissue is an endocrine organ and its endocrine function is closely associated with type 2 diabetes mellitus. Valeriana officinalis (Valerian) exerts some physiological effects; however, its influence on adipocytes remains unclear. We investigated the effect of methanolic Valerian root extract (Vale) on 3T3-L1 adipocytes. Vale (1, 10, and 100 μg/mL) dose-dependently promoted adipocyte differentiation with increasing lipid accumulation. In addition, Vale significantly increased the mRNA levels in genes associated with adipocyte differentiation, including peroxisome proliferator-activated receptor γ (PPARγ), CCAAT/enhancer-binding protein α , and adipocyte protein 2, in dose-dependent manner. Vale also significantly enhanced mRNA and protein levels in adiponectin. A PPARγ antagonist assay and a PPARγ binding assay revealed that Vale-induced increased adipocyte differentiation and adiponectin production were partly associated with direct binding to PPARγ. Valerenic acid, a characteristic component in Valerian, also demonstrated the ability to induce adipocyte differentiation and adiponectin secretion, suggesting that it is one of the functional components in Vale.
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Abbreviations
- BADGE:
-
bisphenol a diglycidyl ether
- C/EBPα:
-
CCAAT/enhancer-binding protein α
- DMEM:
-
Dulbecco’s modified Eagle’s medium (high glucose) with L-glutamine, phenol red, and sodium pyruvate
- DMSO:
-
dimethyl sulfoxide
- MTT:
-
3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- PPARα:
-
peroxisome proliferator-activated receptor α
- PPARγ:
-
peroxisome proliferator-activated receptor γ
- Rosi:
-
Rosiglitazone
- SE:
-
standard error
- Vale:
-
methanolic Valerian root extract
- Valerian:
-
Valeriana officinalis
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This study was partly funded by The Foundation for Dietary Scientific Research (granted to Kazuo Kobayashi-Hattori).
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Harada, K., Kato, Y., Takahashi, J. et al. The Effect of Methanolic Valeriana officinalis Root Extract on Adipocyte Differentiation and Adiponectin Production in 3T3-L1 Adipocytes. Plant Foods Hum Nutr 75, 103–109 (2020). https://doi.org/10.1007/s11130-019-00790-2
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DOI: https://doi.org/10.1007/s11130-019-00790-2