食品科学 ›› 2018, Vol. 39 ›› Issue (11): 196-200.doi: 10.7506/spkx1002-6630-201811031

• 营养卫生 • 上一篇    下一篇

降香内生真菌代谢产物对H2O2诱导的HepG2细胞氧化损伤保护作用

高 原,王福玲,贾 琦,刘 微,周艳岩,张晓萌,咸玥桐   

  1. 哈尔滨商业大学药学院,细胞与分子生物学研究所,黑龙江 哈尔滨 150076
  • 出版日期:2018-06-15 发布日期:2018-06-06
  • 基金资助:
    黑龙江省教育厅科学技术研究项目(12541204)

Protective Effect of an Endophytic Fungus from Dalbergia odorifera T. Chen against H2O2-Induced Oxidative Damage in HepG2 Cells

GAO Yuan, WANG Fuling, JIA Qi, LIU Wei, ZHOU Yanyan, ZHANG Xiaomeng, XIAN Yuetong   

  1. Cell and Molecular Biology Research Institute, College of Pharmacy, Harbin Commercial University, Harbin 150076, China
  • Online:2018-06-15 Published:2018-06-06

摘要: 由降香树皮中分离筛选获得一株抗氧化活性较好的内生真菌JXP21,通过ITS-rDNA序列比对及系统发育分 析对其进行分类鉴定,初步鉴定为链格孢菌(Alternaria alternata),ITS-rDNA序列与GenBank登录号KP979753.1 具有100%的相似性。通过高效液相色谱串联二级质谱对其代谢产物进行检测,检测到了化合物染料木素。进一步 探讨了内生真菌JXP21代谢产物对H2O2诱导的HepG2细胞氧化损伤的保护作用,以200 μmol/L H2O2制备HepG2细胞 氧化应激损伤模型,检测在不同质量浓度(0、10、20、40、80 μg/mL)内生真菌代谢产物的保护作用下,对细胞 丙二醛(malonic dialdehyde,MDA)含量、超氧化物歧化酶(superoxide dismutase,SOD)和谷胱甘肽过氧化物 酶(glutathione peroxidase,GSH-Px)活力的影响。结果表明:内生真菌代谢产物作用于HepG2细胞后,能够降低 H2O2诱导损伤引起的MDA含量的升高,MDA含量由4.65 nmol/mg pro下降为3.68 nmol/mg pro;提高SOD和GSH-Px 活力,SOD活力由6.88 U/mg pro升高至8.64 U/mg pro,GSH-Px活力由8.45 U/mg pro升高至9.68 U/mg pro。表明内生 真菌代谢产物对H2O2诱导所致肝细胞氧化损伤具有一定的保护作用。

关键词: 降香, 内生真菌, 超氧化物歧化酶, 谷胱甘肽过氧化物酶, 丙二醛

Abstract: In this study, a strain of endophytic fungus JXP21 with good antioxidant activity was isolated from the barks of Dalbergia odorifera T. Chen, and was identified as Alternaria alternata through ITS-rDNA sequence alignment and phylogenetic analysis, whose ITS-rDNA sequence was 100% similar with GenBank accession number KP979753.1. The compound genistein was detected as one of its metabolites by high performance liquid chromatography tandem mass spectrometry. The protective effect of the metabolites of JXP21 at different concentrations (0, 10, 20, 40 and 80 μg/mL) on oxidative damage induced by 200 μmol/L H2O2 in HepG2 cells was investigated by measuring malondialdehyde (MDA) content, superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities. The results showed that the fungal metabolites decreased the increase in MDA content from 4.65 to 3.68 nmol/mg protein, increased SOD activity from 6.88 to 8.64 U/mg pro and GSH-Px activity from 8.45 to 9.68 U/mg pro. In conclusion, the results of this study indicated that the endophytic fungal metabolites can protect against oxidative damage induced by H2O2.

Key words: Dalbergia odorifera T. Chen, endophytic fungi, superoxide dismutase, glutathione peroxidase, malondialdehyde

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