Sensitization of Human Carcinoma of Nasopharynx Cells to Doxorubicin and Induction of Apoptosis by Sargassum baccularia Lipophilic Fraction

Chantarawan SAENGKHAE; Yanee PREMSURIYA; Rattanaporn SRIVIBOOL; Jantana PRAIBOON

Authors

Chantarawan SAENGKHAE Faculty of Allied Health Sciences, Burapha University, Chonburi 20131
Yanee PREMSURIYA Faculty of Allied Health Sciences, Burapha University, Chonburi 20131
Rattanaporn SRIVIBOOL Institutes of Marine Science, Burapha University, Chonburi 20131
Jantana PRAIBOON Faculty of Fisheries, Kasetsart University, Department of Fishery Biology, Bangkok 10900

Keywords:

Sargassum baccularia, lipophilic fraction, apoptosis, carcinoma of nasopharynx cells

Abstract

The pharmaceutical properties of marine bioactive compounds derived from variants of the Sargassum species have long been recognized as important features for medicinal use. However, the molecular mechanisms of their anticancer activities are unclear. This study aimed to investigate the apoptosis-modulating activities of Sargassum baccularia lipophilic fraction (SBL fraction) in human carcinoma of nasopharynx cells (KB cells). Sargassum baccularia was extracted with 95 % ethanol and then fractionated through solvent-solvent partitioning with chloroform: methanol: water. It was found that SBL fraction and doxorubicin (Dox) alone inhibited proliferation in KB cells with IC₅₀ of 85.04 ± 5.28 and 2.0 ± 0.1 µg/ml, respectively. The combined SBL fraction (10 - 50 µg/ml) and Dox (1 µg/ml) treatment produced greater cytotoxicity associated with the increasing of chromatin condensation, DNA fragmentation, and hypo-diploid cells (DNA < 2n), compared with each SBL fraction and Dox alone. Apoptosis induced by SBL fraction was associated with caspase-3 activation that was attenuated in a caspase-3 inhibitor. Thus, SBL fraction acts as potent sensitizer for doxorubicin-induced apoptosis, and it can be potentially developed into a promising adjuvant therapy for nasopharynx carcinoma.

doi:10.14456/WJST.2015.78

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Author Biography

Chantarawan SAENGKHAE, Faculty of Allied Health Sciences, Burapha University, Chonburi 20131

Physiology department

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