Cited by 154Phytochemicals and Medicinal PlantsGenomics, phytochemicals, and oxidative stressMedicinal Plant Research

Terminalia bellirica (Gaertn.) Roxb. Extract and Gallic Acid Attenuate LPS‐Induced Inflammation and Oxidative Stress via MAPK/NF‐κ B and Akt/AMPK/Nrf2 Pathways

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Tanaka, Miori, Kishimoto, Yoshimi, Sasaki, Mizuho, Sato, Akari, Kamiya, Tomoyasu, Kondo, Kazuo, Iida, Kaoruko·2018·Oxidative Medicine and Cellular Longevity

Abstract

Excessive oxidative stress plays a critical role in the progression of various diseases. Recently, we showed that Terminalia bellirica (Gaertn.) Roxb. extract (TBE) inhibits inflammatory response and reactive oxygen species (ROS) production in THP‐1 macrophages. However, molecular mechanisms underlying anti‐inflammatory and antioxidant activities of TBE and its major polyphenolic compounds gallic acid (GA) and ellagic acid (EA) remain unclear. We found that TBE and GA attenuated LPS‐induced inflammatory mediator expression, ROS production, and activation of mitogen‐activated protein kinase (MAPK) and nuclear factor‐kappa B (NF‐κB) in RAW 264 macrophages. Furthermore, TBE and GA increased antioxidant enzyme expression along with upstream mediators nuclear factor erythroid‐2‐related factor 2 (Nrf2), Akt, and AMP‐activated protein kinase (AMPK). Importantly, knockdown of Nrf2 by siRNA and specific inhibition of Akt and AMPK significantly reduced antioxidant enzyme expression induced by TBE and GA. Finally, in vivo effects on histopathology and gene expression were assessed in tissues collected after intraperitoneal injection of LPS with or without TBE treatment. TBE enhanced antioxidant enzyme expression and improved acute kidney injury in LPS‐shock model mice. In conclusion, TBE and GA exert protective effects against inflammation and oxidative stress by suppressing MAPK/NF‐κB pathway and by activating Akt/AMPK/Nrf2 pathway. These results suggest that TBE and GA might be effective for the treatment of inflammation‐related diseases.

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Authors
Tanaka, M., Kishimoto, Y., Sasaki, M., Sato, A., Kamiya, T., Kondo, K., & Iida, K.
Affiliations
  • Ochanomizu University (JP)
  • Toyo University (JP)
Corresponding author
Iida, Kaoruko
Venue
Oxidative Medicine and Cellular Longevity
Publisher
Wiley
Published
2018-01
Volume
2018
Issue
1
Pages
9364364-9364364
ISSN
  • 1942-0994 (ISSN-L)
  • 1942-0900
OpenAlex
W2899712363
Cited by
154
References
48
Citations by year
2026: 10 · 2025: 13 · 2024: 26 · 2023: 26 · 2022: 28 · 2021: 22 · 2020: 20 · 2019: 9
FWCI
17.50
Type
journal article
Language
en
Open access
Locations
  • Oxidative Medicine and Cellular Longevity (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Japan Society for the Promotion of Science (JP16H03033, JP15H02895, JP18J13346)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Phytochemicals and Medicinal Plants
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics, phytochemicals, and oxidative stress
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Medicinal Plant Research
Keywords
Terminalia bellirica, gallic acid, ellagic acid, lipopolysaccharide-induced inflammation, oxidative stress, macrophages, reactive oxygen species, antioxidant enzymes, acute kidney injury, sepsis, anti-inflammatory activity
MeSH terms
RAW 264.7 Cells, Adenylate Kinase, Animals, Anti-Inflammatory Agents, Gallic Acid, Inflammation, Lipopolysaccharides, Male, Mice, Inbred ICR, Plant Extracts, Signal Transduction, NF-kappa B, Oxidative Stress, MAP Kinase Signaling System, Terminalia, Proto-Oncogene Proteins c-akt, NF-E2-Related Factor 2, Mice

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