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Glycyrrhizic acid inhibits leukemia cell growth and migration via blocking AKT/mTOR/STAT3 signaling.

Abstract
Glycyrrhizic acid (GA) is the bioactive compound of licorice and has been used as an herbal medicine because of its anti-viral, anti-cancer, and anti-inflammatory properties. This study was designed to investigate the effects of GA on leukemia cells growth, migration, and the mechanisms underlying the anti-cancer activities of GA. MTT test was used to detect the effect of GA on TF-1 leukemia cell growth. Wound closure assay and Transwell were adopted to assess the effect of GA on TF-1 migration and invasion. Migration and invasion related proteins including AKT and mTOR were detected by western blot assay. We further used western blot and immunofluorescence assay to evaluate the effect of GA on STAT3 phosphorylation in vitro. We also evaluated the anti-tumor effect of GA in TF-1 tumor bearing BALB/c mice model. The present study showed GA significant inhibit of TF-1 proliferation in a dose and time-dependent manner. GA could remarkably inhibit TF-1 cell migration and invasion; meanwhile effectively suppress AKT, mTOR, and STAT3 phosphorylation in TF-1 cells. GA in 100 mg/kg/ could inhibit the tumor growth in vivo and down-regulated AKT, mTOR, and STAT3 phosphorylation in TF-1 tumor tissues. Our findings suggest that GA is a promising therapeutic agent for leukemia that targets the AKT/mTOR/STAT3 pathway.
AuthorsSi-Qi He, Meng Gao, Yun-Feng Fu, Ya-Nan Zhang
JournalInternational journal of clinical and experimental pathology (Int J Clin Exp Pathol) Vol. 8 Issue 5 Pg. 5175-81 ( 2015) ISSN: 1936-2625 [Electronic] United States
PMID26191214 (Publication Type: Journal Article)
Chemical References
  • Antineoplastic Agents, Phytogenic
  • STAT3 Transcription Factor
  • STAT3 protein, human
  • Glycyrrhizic Acid
  • MTOR protein, human
  • Proto-Oncogene Proteins c-akt
  • TOR Serine-Threonine Kinases
Topics
  • Animals
  • Antineoplastic Agents, Phytogenic (pharmacology)
  • Cell Line, Tumor
  • Cell Movement (drug effects)
  • Cell Proliferation (drug effects)
  • Cell Size (drug effects)
  • Dose-Response Relationship, Drug
  • Female
  • Glycyrrhizic Acid (pharmacology)
  • Humans
  • Leukemia (drug therapy, enzymology, pathology)
  • Mice, Inbred BALB C
  • Phosphorylation
  • Proto-Oncogene Proteins c-akt (metabolism)
  • STAT3 Transcription Factor (metabolism)
  • Signal Transduction (drug effects)
  • TOR Serine-Threonine Kinases (metabolism)
  • Time Factors
  • Xenograft Model Antitumor Assays

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