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Sains Malaysiana 44(12)(2015): 1685–1691
Bioactive Constituent Characterization and Antioxidant Activity of Ganoderma lucidum Extract Fractionated by Supercritical Carbon Dioxide (Pencirian Juzuk Bioaktif dan Aktiviti
Antioksidan Ekstrak Ganoderma lucidum
Terpecah oleh Karbon Dioksida Supergenting)
MEI-SU
LIN1,2,
ZER-RAN
YU3,
BE-JEN
WANG1,
CHENG-CHI
WANG4,
YIH-MING WENG1
&
1Department
of Food Science, National Chiayi University, 300 Syuefu Road, Chiayi City,
60004,
Taiwan
2Biotechnology
Research Center, Far East University, 49 Zhonghua Road, Tainan City, 74448,
Taiwan 1691
3Superwell Biotechnology Corporation, 465 Wenxin South 2nd
Road, Taichung City, 40876, Taiwan
4Graduate
Institute of Precision Manufacturing, National Chin-Yi University of Technology,
57, Sec. 2, Zhongshan Road, Taiping District, Taichung, 41170, Taiwan
5Department
of Medical Research, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical
Foundation
2 Minsheng Road, Dalin, Chiayi, 62247, Taiwan
Received: 25 August 2014/Accepted: 23 June 2015
ABSTRACT
Ganoderma lucidum has been recognized as a precious fungus in
both Chinese and Japanese traditional medicine for centuries. It contains many
bioactive ingredients such as triterpenoids and polysaccharides. The present
study used supercritical carbon dioxide (SC-CO2)
fractionation to fractionate Ganoderma lucidum extract into four
fractions (R, F1, F2, & F3) and evaluate the correlation between the
content of functional components and their antioxidant ability. Relatively high
concentrations of the three types of bioactive constituents were simultaneously
partitioned into different fractionation collecting vessels. The free radical
scavenging ability was greatest in F1. The IC50 of DPPH scavenging ability was 0.90 mg/mL and that of ABTS radicals
scavenging activity was 0.45 mg/mL. The correlation analysis of antioxidant
ability with total triterpenoids and total polyphenols showed a positive
relationship. In conclusion, this study showed that fractionation of Ganoderma
lucidum extract using SC-CO2 fractionation technology was
able to effectively partition its bioactive components including triterpenoids,
polysaccharides and phenolic compounds and also to increase the antioxidant
activities of the fractions.
Keywords: Antioxidant activities; Ganoderma lucidum; supercritical carbon
dioxide fractionation; total polysaccharides; total triterpenoids
ABSTRAK
Ganoderma lucidum telah dikenal pasti sebagai kulat berharga dalam
kedua-dua perubatan tradisi Cina dan Jepun selama berabad-abad.
Ia mengandungi banyak bahan bioaktif seperti triterpenoids dan polisakarida.
Kajian ini menggunakan pemecahan karbon dioksida supergenting (SC-CO2)
untuk ekstrak Ganoderma lucidum terpecah kepada empat pecahan
(R, F1, F2 , & F3) dan menilai hubung kait antara kandungan
komponen berfungsi dan keupayaan antioksidan mereka. Kepekatan yang
agak tinggi daripada tiga jenis juzuk bioaktif dibahagikan secara
serentak kepada pemeringkatan vesel pengumpulan berbeza. Keupayaan
skaveng radikal bebas adalah terbaik dalam F1. IC50 keupayaan skaveng DPPH adalah
0.90 mg/mL dan aktiviti skaveng radikal ABTS adalah 0.45 mg/mL. Analisis
korelasi kemampuan antioksidan dengan jumlah triterpenoid dan polifenol
menunjukkan hubungan yang positif. Kesimpulannya, kajian ini menunjukkan
bahawa pemeringkatan ekstrak Ganoderma lucidum menggunakan
teknologi pemeringkatan SC-CO2 dapat memisahkan komponen bioaktif
dengan berkesan termasuk triterpenoid, polisakarida dan sebatian
fenolik serta meningkatkan aktiviti antioksidan pecahan.
Kata kunci: Aktiviti antioksidan; Ganoderma lucidum; jumlah polisakarida;
jumlah triterpenoid; karbon dioksida superkritikal pemeringkatan
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*Corresponding author; email: m.koo@utoronto.ca
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