香莲方对白念珠菌生物膜体外模型的影响及代谢组学研究

摘要

Objective:To study the antifungal efficacy and the probable mechanism of Candida albicans biofilms in vitro by Xianglian Solution, in the view of metabolomics.Methods:C.albi-cans biofilms in vitro were established, and the SMIC50 and SMIC80 of the C.albicans biofilms in different maturity (4 h, 24 h and 48 h) were measured by XTT.Through the method of UPLC-Q-TOF-MS, the metabolomics of the planktonic,early (4 h),medium term(24 h),and maturity(48 h) biofilms were detected.Results:The effect of Xianglian Solution,the SMIC50 of early (4 h), medium term(24 h) and maturity(48 h) biofilms were 7.81,125 and 500 mg/mL respectively. The SMIC80 were up to 31.25,250 and >1 000 mg/mL respectively.For Fluconazole,the SMIC50 of early (4 h),medium term(24 h) and maturity(48 h) biofilms were 32,64 and >1 024μg/mL respectively,while the SMIC80 were up to 64,128 and >1 024μg/mL respectively.The metabolic profiling of the planktonic among Group Xianglian Solution,Group Fluconazole and control group were different from each other.The metabolin Tyrosyl-Arginine and Pentosidine were identified as the potential metabolin .Conclusions:Xianglian Solution was effective to C .albicans biofilms. Sugar metabolism and changes in amino acid metabolism pathways may relate to the biofilms for-mation.%目的：从代谢组学角度探讨香莲外洗液对白念珠菌生物膜的抗真菌效力及其作用机制。方法：建立白念珠菌生物膜体外模型，采用 XTT减低法测定香莲外洗液、氟康唑对不同成熟程度（4 h、24 h、48 h）白念珠菌生物膜的最低粘附抑菌浓度（ SMIC50、SMIC80），并采用UPLC-Q-TOF-MS分别进行代谢组学检测。结果：香莲外洗液对4 h、24 h、48 h的白念珠菌生物膜的 SMIC50分别为7.81、125和500 mg／mL，SMIC80分别为31.25、250和＞1000 mg／mL；氟康唑对4 h、24 h、48 h的白念珠菌生物膜的SMIC50分别为32、64和＞1024μg／mL，SMIC80分别为64、128和＞1024μg／mL；香莲外洗液、氟康唑干预不同成熟程度的生物膜代谢模式不同，存在Tyrosyl-Arginine（酪氨酰－精氨酸）、Pentosidine（戊糖）等多种可能差异代谢物。结论：香莲外洗液对不同成熟程度的白念珠菌体外生物膜具有不同程度的抑制作用，白念珠菌悬浮菌与生物膜在代谢过程中，主要涉及了糖代谢、氨基酸代谢途径的改变。