Apoptotic Mechanism of Human Leukemia K562/A02 Cells Induced by Magnetic Ferroferric Oxide Nanoparticles Loaded with Wogonin.

Miao-Xin PENG; Xiao-Yue WANG; Fan WANG; Lei WANG; Pei-Pei XU; Bing CHEN

Return

Apoptotic Mechanism of Human Leukemia K562/A02 Cells Induced by Magnetic Ferroferric Oxide Nanoparticles Loaded with Wogonin.

Author: Miao-Xin PENG ¹ ; Xiao-Yue WANG ² ; Fan WANG ¹ ; Lei WANG ³ ; Pei-Pei XU ¹ ; Bing CHEN ¹
Author Information

1. Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, China.
2. Department of Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, China.
3. Department of Hematology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, China.
Publication Type:Journal Article
MeSH: Apoptosis; drug effects; Cell Cycle; drug effects; Cell Line, Tumor; Cell Proliferation; drug effects; Cell Survival; drug effects; Drug Delivery Systems; methods; Drug Resistance, Multiple; Drugs, Chinese Herbal; chemistry; pharmacology; Flavanones; chemistry; pharmacology; Humans; K562 Cells; Magnetics; Nanoparticles; chemistry
From: Chinese Medical Journal 2016;129(24):2958-2966
CountryChina
Language:English
Abstract:
BACKGROUNDTraditional Chinese medicine wogonin plays an important role in the treatment of leukemia. Recently, the application of drug-coated magnetic nanoparticles (MNPs) to increase water solubility of the drug and to enhance its chemotherapeutic efficiency has attracted much attention. Drugs coated with MNPs are becoming a promising way for better leukemia treatment. This study aimed to assess the possible molecular mechanisms of wogonin-coated MNP-Fe3O4 (Wog-MNPs-Fe3O4) as an antileukemia agent.
METHODSAfter incubated for 48 h, the antiproliferative effects of MNPs, wogonin, or Wog-MNPs-Fe3O4on K562/A02 cells were determined by methyl thiazolyl tetrazolium (MTT) assay. The apoptotic rates of K562/A02 cells treated with either wogonin or Wog-MNPs-Fe3O4were determined by flow cytometer (FCM) assay. The cell cycle arrest in K562/A02 cells was determined by FCM assay. The elementary molecular mechanisms of these phenomena were explored by Western blot and reverse transcriptase polymerase chain reaction (RT-PCR).
RESULTSWith cell viabilities ranging from 98.76% to 101.43%, MNP-Fe3O4was nontoxic to the cell line. Meanwhile, the wogonin and Wog-MNPs-Fe3O4had little effects on normal human embryonic lung fibroblast cells. The cell viabilities of the Wog-MNPs-Fe3O4group (28.64-68.36%) were significantly lower than those of the wogonin group (35.53-97.28%) in a dose-dependent manner in 48 h (P < 0.001). The apoptotic rate of K562/A02 cells was significantly improved in 50 μmol/L Wog-MNPs-Fe3O4group (34.28%) compared with that in 50 μmol/L wogonin group (23.46%; P< 0.001). Compared with those of the 25 and 50 μmol/L wogonin groups, the ratios of G0/G1-phase K562/A02 cells were significantly higher in the 25 and 50 μmol/L Wog-MNPs-Fe3O4groups (all P< 0.001). The mRNA and protein expression levels of the p21 and p27 in the K562/A02 cells were also significantly higher in the Wog-MNPs-Fe3O4group compared with those of the wogonin group (all P< 0.001).
CONCLUSIONSThis study demonstrated that MNPs were the effective drug delivery vehicles to deliver wogonin to the leukemia cells. Through increasing cells arrested at G0/G1-phase and inducing apoptosis of K562/A02 cells, MNPs could enhance the therapeutic effects of wogonin on leukemia cells. These findings indicated that MNPs loaded with wogonin could provide a promising way for better leukemia treatment.