Active Ingredients and Antioxidative and Anti-EV71 Virus Effects of Grifola frondosa Ethanol Extract
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摘要:
目的 探究灰树花适宜的乙醇提取浓度,分析不同乙醇浓度提取对灰树花活性成分及抗氧化、抗EV71病毒活性的影响,促进灰树花的开发利用。 方法 分别采用55%、70%和95%的乙醇溶液作为提取溶剂对灰树花子实体进行超声波辅助提取,测定不同浓度乙醇提取物主要活性成分含量并对其抗氧化、抗EV71病毒能力进行相关性分析。 结果 不同乙醇浓度提取物活性成分含量存在差异,灰树花95%乙醇提取物(GFE95)中多酚和三萜含量最高分别为0.042%和1.82%,灰树花55%乙醇提取物(GFE55)中多糖和蛋白质含量最高,分别为33.08%和17.45%。GFE55、灰树花70%乙醇提取物(GFE70)和GFE95具有不同程度的抗氧化和EV71病毒抑制作用。其中,GFE95的抗氧化能力最好,对2,2-联苯基-1-苦基肼基(DPPH)、2,2′-联氨双二胺盐(ABTS+)、超氧阴离子(O2−)和过氧化氢(H2O2)自由基的清除能力的IC50值分别为0.7427、0.7414、0.902、0.4146 mg·mL−1。GFE95的抗病毒作用较强,当样品质量浓度为200 μg·mL−1时,GFE95对EV71病毒的抑制率最高,达88.18%,其对EV71病毒抑制率的IC50值为194.80 μg·mL−1,TI值为9.65。皮尔逊相关性分析结果表明DPPH、ABTS+、O2−自由基清除率与三萜类成分含量呈极显著正相关,相关系数分别为0.992、0.971和0.613(P<0.01)。O2−、H2O2自由基清除率与多酚类成分含量呈极显著正相关,相关系数分别为0.921和0.997(P<0.01)。EV71病毒抑制作用与多酚、三萜类成分含量呈极显著正相关(P<0.01),相关系数分别为0.536和0.954。灰树花中三萜和多酚的含量与抗氧化、抗病毒活性具有较强的相关性。 结论 以体积分数为95%的乙醇溶液为提取剂,可有效提取灰树花中具有抗氧化、抗病毒活性的多酚、三萜、多糖等活性物质,提高灰树花的生物活性,是进一步促进灰树花的高值化应用开发的关键。研究结果为灰树花的提取溶剂选择及活性作用的研究奠定基础。 Abstract:Objective Active ingredients and antioxidative and anti-EV71 virus activities of the Grifola frondose extracts using varied concentration of ethanol were analyzed. Method Using 55%, 70%, and 95% ethanol solutions, a ultrasound-assisted extraction was conducted to produce concoctions from G.frondosa fruiting bodies.Content of active ingredients and efficacy of the extracts obtained with varied concentrations of ethanol as an antioxidant and anti-EV71 virus agent were determined. Result The content of polyphenols at 0.042% and that of triterpenes at 1.82% were the highest in the 95% ethanol extract (GFE95) of all concoctions.The maximal polysaccharides at 33.08% and proteins at 17.45% were found in GFE55 that used 55% ethanol for the extraction.GFE95 also showed the greatest antioxidant capacity with IC50 on scavenging DPPH, ABTS+, O2−, and H2O2 free radicals of 0.742 7 mg·mL−1, 0.741 4 mg·mL−1, 0.902 6 mg·mL−1, and 0.414 6 mg·mL−1, respectively, and a strong antiviral effect on EV71 at the concentration of 200 μg·mL−1 with the inhibition rate of 88.18%, an IC50 of 194.80 μg·mL−1, and a TI of 9.65.A Pearson’s correlation analysis indicated that the DPPH, ABTS+, and O2− free radical scavenging rates significantly correlated to the triterpenoids content with correlation coefficients of 0.992, 0.971, and 0.613, respectively (P<0.01); the O2− and H2O2 free radical scavenging rates significantly correlated to the polyphenols with correlation coefficients of 0.921 and 0.997, respectively (P<0.01); the anti-EV71 virus effect significantly correlated to the polyphenols and triterpenoids with correlation coefficients of 0.536 and 0.954, respectively (P<0.01); and the triterpenoids and polyphenols significantly correlated to the antioxidative and antiviral activities of the extract. Conclusion The 95% ethanol extraction of G.frondosa optimally retrieved the active substances, such as polyphenols, triterpenes, and polysaccharides, in the fruiting bodies.The extract exhibited significant antioxidative and antiviral capacities, with which a valuable pharmaceutical material might be developed. -
Key words:
- Grifola frondosa /
- ethanol extract /
- active ingredients /
- antioxidant activity /
- antiviral activity
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表 1 灰树花不同浓度乙醇提取物抗氧化作用的IC50值
Table 1. IC50 of antioxidative activities of G.frondosa extracts obtained by using ethanol of varied concentrations
样品名称
Description of sampleDPPH自由基
清除能力IC50值
DPPH·/( mg·mL−1)ABTS阳离子
自由基清除能力IC50值
ABTS +·/( mg·mL−1)超氧阴离子
自由基清除能力IC50值
O2−·/( mg·mL−1)过氧化氢
自由基清除能力IC50值
H2O2·/( mg·mL−1)GFE55 1.3070 0.9327 1.1960 1.0140 GFE70 0.9958 0.8085 1.4280 2.5830 GFE95 0.7427 0.7414 0.9026 0.4146 表 2 灰树花不同浓度乙醇提取物对EV71病毒的TC50 、TC50 和TI
Table 2. TC50, TC50, and TI on EV71 of G.frondosa extracts obtained by using ethanol of varied concentrations
样品名称
Description of
sample样品半数
中毒浓度
TC50/(μg·mL−1)抗EV71病毒
半数有效浓度
IC50/(μg·mL−1)治疗指数
TIGFE55 1868.00 440.60 4.24 GFE70 1869.00 401.50 4.66 GFE95 1879.00 194.80 9.65 表 3 灰树花不同浓度乙醇提取物活性物质的含量与抗氧化、抗EV71病毒活性IC50的相关系数
Table 3. Correlation coefficients between IC50 of antioxidant and anti-EV71 activities and contents of active ingredients of G.frondosa extracts obtained by using ethanol of varied concentrations
指标
Index多酚
Polyphenols三萜
Triterpenoids多糖
Polysaccharide蛋白质
ProteinDPPH自由基清除率IC50 IC50 of DPPH radical scavenging rate 0.130 0.992** −0.252 −0.997** ABTS+自由基清除率IC50 IC50 of ABTS+ radical scavenging rate 0.019 0.971** −0.358 −0.982** O2−自由基清除率IC50 IC50 of O2− radical scavenging rate 0.921** 0.613** 0.706** −0.573** H2O2自由基清除率IC50 IC50 of H2O2 radical scavenging rate 0.997** 0.334 0.893** −0.286 EV71病毒抑制率IC50 IC50 of EV71 virus inhibition rate 0.536** 0.954** 0.179 −0.937** *代表显著相关(P<0.05),**代表极显著相关(P<0.01)。
* represents significant correlation (P<0.05); ** represents extremely significant correlation (P<0.01). -
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