天然产物研究与开发 ›› 2021, Vol. 33 ›› Issue (6): 998-1005.doi: 10.16333/j.1001-6880.2021.6.014

• 开发研究 • 上一篇    下一篇

枯草芽孢杆菌BS-Z15代谢产物治疗白色念珠菌感染昆明小鼠的作用

陈忠宜1,李金玉1,葛风伟1,谢尔瓦尼木·阿不都艾尼1,赵晶晶1,宁焕宸1,赵和平2,赵惠新1*   

  1. 1新疆师范大学生命科学学院 干旱区植物逆境生物学实验室,乌鲁木齐 830054;2北京师范大学生命科学学院,抗性基因资源与分子发育北京市重点实验室,北京 100875

  • 出版日期:2021-06-28 发布日期:2021-07-02
  • 基金资助:
    新疆维吾尔自治区重点实验室开放课题(2020D0410);国家自然科学联合项目(U1703112);新疆师范大学研究生科研创新项目(XSY202002010)

Effect of Bacillus subtilis BS-Z15 metabolites in the treatment of Candida albicans infected Kunming mice

CHEN Zhong-yi1,LI Jin-yu1,GE Feng-wei1,XIEERWANIMU A-bu-du-ai-ni1,ZHAO Jing-jing1,NING Huan-chen1,ZHAO He-ping2,ZHAO Hui-xin1*
  

  1. 1Laboratory of Plant Adversity Biology in Arid Regions,School of Life Sciences,Xinjiang Normal University,Urumqi 830054,China; 2Beijing Key Laboratory of Resistance Gene Resources and Molecular Development,School of Life Sciences,Beijing Normal University,Beijing 100875,China

  • Online:2021-06-28 Published:2021-07-02

摘要:

本文就枯草芽孢杆菌BS-Z15发酵液中粗提的代谢产物(metabolites extracted from fermentation broth, MEs)对白色念珠菌的抑制作用进行了研究,并探讨了该提取物治疗感染白色念珠菌的昆明小鼠的作用。根据《产孢丝状真菌液基稀释法抗真菌药物敏感性试验方案》测定了MEs的最小抑菌浓度(MIC),进一步在建立小鼠白色念珠菌感染模型基础上,以氟康唑(90 mg/kg)为阳性药物对照组,以生理盐水为模型对照组,以MEs高剂量(90 mg/kg)、MEs中剂量(60 mg/kg)、MEs低剂量(30 mg/kg)为实验组,采用灌胃给药法处理,以一般状况、体重、死亡率,肝脾病变程度、血清中总抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量变化为评价指标,分析MEs对小鼠白色念珠菌感染模型的治疗作用。结果表明,MEs对白色念珠菌的MIC为0.33 mg/mL,MEs可使酵母态白色念珠菌菌体表面凹陷致死。与模型组比较,MEs高剂量治疗小鼠表现出更好的生理状态,肝脾的损伤程度明显改善,死亡率显著降低,血清中的总抗氧化活性及SOD活性显著增加、MDA含量显著下降。比较MEs不同剂量处理的小鼠,表明治疗效果在一定浓度范围内与剂量成正相关性。说明枯草芽孢杆菌BS-Z15代谢产物对感染白色念珠菌的小鼠有一定的疗效,具有潜在的治疗白色念珠菌真菌病的药用价值。

关键词: 枯草芽孢杆菌BS-Z15, 代谢产物, 白色念珠菌感染, 小鼠

Abstract:

In this research,we investigated the inhibitory effect of metabolites extracted from fermentation broth (MEs) of Bacillus subtilis BS-Z15 on Candida albicans,and discussed the effect of this extract on the treatment of C. albicans infected mice in Kunming.The minimum inhibitory concentration (MIC) of MEs was determined according to the "Antifungal Drug Sensitivity Test Protocol for Liquid-Based Dilution of Sporulating Filamentous Fungi".The therapeutic effect of MEs on the murine model of C. albicans infection in mice was analyzed using the following parameters:general condition,body weight,mortality,liver and spleen lesions,total antioxidant capacity (T-AOC),superoxide dismutase (SOD) activity,and malondialdehyde (MDA) content in serum.The results showed that the MIC of MEs against C. albicans was 0.33 mg/mL,and MEs could cause yeast C. albicans surface depression and lethality.Compared with the model group,mice treated with high doses of MEs showed better physiological status,significantly improved liver and spleen damage,significantly reduced mortality,significantly increased total antioxidant activity and SOD activity in serum,and significantly decreased MDA content.The comparison of MEs in mice treated with different doses showed that the treatment effect was dose-dependent in a certain concentration range.This indicates that B. subtilis BS-Z15 metabolites have a certain therapeutic effect on mice infected with C. albicans and have potential medicinal value in the treatment of C. albicans fungal diseases.

Key words: Bacillus subtilis BS-Z15, metabolites, Candida albicans infection, mice

中图分类号:  R96 Q93