Radical Scavenging Activities of Phellinus pini

The concentration of phenolics in Phellinus pini (CY001) extracts, expressed as mg of GAEs per g of P. pini fractions, and the EtOAc fraction (436.5 mg GAEs/g) of P. pini had a higher phenolic content than other fractions. Several biochemical assays were used to screen antioxidant properties such as reducing power, 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity, NBT/XO superoxide system and inhibition of DCF/AAPH peroxyl radicals. Among the six mushroom extracts, the EtOAc fraction from P. pini (CY001) showed the most potent DPPH radical, superoxide radical, and peroxyl radical scavenging activities, with $IC_{50}$ values of $11.49\;{\mu}g/ml$, $8.32\;{\mu}g/ml$, and $1.91\;{\mu}g/ml$, respectively. The EtOAc fraction of P. pini (CY001) significantly inhibited enzymatic lipid peroxidation and effectively attenuated LPS-induced NO production of RAW 264.7 cells without cytotoxicity. We also found that the EtOAc fraction had a significant hepato-protectant effect on tacrine-induced cytotoxicity in HepG2 cells. These findings suggest that P. pini (CY001) may have potential as a natural antioxidant, which contains compound(s) with radical scavenging activity.

상황버섯(Phellinus pini)의 라디칼 소거작용

Phellinus pini (CY001) 추출물에서의 페놀류성분의 농도는 P. pini (CY001)분획 g 당 GAEs mg으로 나타내었고, P. pini의 EtOAc 분획 (436.5 mg GAEs/g)이 다른 분획에 비해 가장 높은 함량을 나타내었다. 환원력과 같은 항산화 활성을 screening 하기 위해 몇 가지 생화학적 시험이 수행되었고, 그것은 2, 2-diphenyl-1-picrylhydrazyl(DPPH) 라디칼 소거작용, NBT/XO superoxide system, DCF/AAPH peroxyl radicals 저해능 등이다. 여섯 개의 버섯추출물 분획 중에서 EtOAc 분획이 DPPH, superoxide 라디칼, peroxyl 라디칼 소거작용이 뛰어났고, $IC_{50}$ values는 각각 $11.49\;{\mu}g/ml$, $8.32\;{\mu}g/ml$, and $1.91\;{\mu}g/ml$이었다. P. pini (CY001)의 EtOAc 분획은 중요한 효소적 지질과산화 저해와 cytotoxicity 없이 RAW 264.7 macrophages의 LPS 유도 NO 생성을 효과적으로 감소시켰다. 또한 EtOAc 분획이 HepG2 cell의 타크린 유도 cytotoxicity에서 간 보호 작용을 나타내었다. 이러한 결과를 바탕으로 P. pini (CY001)가 라디칼 소거작용을 하는 성분을 함유한 천연 항산화제로써의 잠재력을 갖고 있는 것으로 사료된다.