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In vitro and in vivo characterization of the anticancer activity of Thai stingless bee (Tetragonula laeviceps) cerumen
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Document Title
In vitro and in vivo characterization of the anticancer activity of Thai stingless bee (Tetragonula laeviceps) cerumen
Author
Nugitrangson P., Puthong S., Iempridee T., Pimtong W., Pornpakakul S., Chanchao C.
Name from Authors Collection
Affiliations
Program in Biotechnology, Chulalongkorn University, Bangkok, 10330, Thailand; Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; National Nanotechnology Center, National Science and Technology Development Agency, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani, 12120, Thailand; Research Centre for Bioorganic Chemistry, Department of Chemistry, Chulalongkorn University, Bangkok, 10330, Thailand; Department of Biology, Chulalongkorn University, Bangkok, 10330, Thailand
Type
Article
Source Title
Experimental Biology and Medicine
ISSN
15353702
Year
2016
Volume
241
Issue
2
Page
166-176
Open Access
All Open Access, Green
Publisher
SAGE Publications Inc.
DOI
10.1177/1535370215600102
Format
Abstract
Tetragonula laeviceps cerumen was sequentially extracted with 80% (v/v) methanol, dichloromethane, and hexane and also in the reverse order. By the MTT assay and the respective 50% inhibition concentration value, the most active fraction was further purified to apparent homogeneity by bioassay-guided silica gel column chromatography. α-Mangostin was identified by high-resolution electrospray ionization mass spectrometry and nuclear magnetic resonance analyses. It had a potent cytotoxicity against the BT474, Chago, Hep-G2, KATO-III, and SW620 cell lines (IC50 values of 1.22 ± 0.03, 2.25 ± 0.20, 0.94 ± 0.01, 0.88 ± 0.16, and 1.50 ± 0.39 µmol/L, respectively). The in vitro cytotoxicity of α-mangostin against the five human cancer cell lines and primary fibroblasts was further characterized by real-time impedance-based analysis. Interestingly, α-mangostin was more cytotoxic against the cancer-derived cell lines than against the primary fibroblasts. Later, the migration assay was performed by continuously measuring the attachment of cells to the plate electrodes at the bottom of the transwell membrane. The combined caspase-3 and -7 activities were assayed by the Caspase-Glo® 3/7 kit. It showed that the cytotoxic mechanism involved caspase-independent apoptosis, while at low (non-toxic) concentrations α-mangostin did not significantly alter cell migration. Furthermore, the in vivo cytotoxicity and angiogenesis were determined by alkaline phosphatase staining in zebrafish embryos along with monitoring changes in the transcript expression level of two genes involved in angiogenesis (vegfaa and vegfr2) by quantitative real-time reverse transcriptase- polymerase chain reaction. It was found that the in vivo cytotoxicity of α-mangostin against zebrafish embryos had a 50% lethal concentration of 9.4 µM, but no anti-angiogenic properties were observed in zebrafish embryos at 9 and 12 µM even though it downregulated the expression of vegfaa and vegfr2 transcripts. Thus, α-mangostin is a major active compound with a potential anticancer activity in T. laeviceps cerumen in Thailand. © 2015, © 2015 by the Society for Experimental Biology and Medicine.
Keyword
cancer | cerumen | Cytotoxicity | Tetragonula laeviceps | α-Mangostin
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Chulalongkorn University; National Nanotechnology Center
License
N/A
Rights
N/A
Publication Source
Scopus