J Vis Exp:建立体外模型观察光动力治疗对金黄色葡萄球菌生物膜的影响

2018-05-02 MedSci MedSci原创

金黄色葡萄球菌是一种常见的人类病原体,可引起脓毒性和全身性感染。金黄色葡萄球菌感染难以根除,不仅由于抗生素抗性菌株的出现,而且由于其生物膜的形成能力。 最近,越来越多的研究人员提出光动力疗法(PDT)用于控制生物膜感染。然而,需要进一步的研究来提高我们对细菌生物膜作用的认识,以及潜在的机制。本研究描述了PDT与5-氨基乙酰丙酸(5-ALA)(实际光敏剂原卟啉IX(PpIX)的前体)的体外模型

金黄色葡萄球菌是一种常见的人类病原体,可引起脓毒性和全身性感染。金黄色葡萄球菌感染难以根除,不仅由于抗生素抗性菌株的出现,而且由于其生物膜的形成能力。

最近,越来越多的研究人员提出光动力疗法(PDT)用于控制生物膜感染。然而,需要进一步的研究来提高我们对细菌生物膜作用的认识,以及潜在的机制。本研究描述了PDT与5-氨基乙酰丙酸(5-ALA)(实际光敏剂原卟啉IX(PpIX)的前体)的体外模型。

简言之,将成熟的金黄色葡萄球菌生物膜与ALA一起温育,然后暴露于光下。随后,通过计算菌落形成单位(CFU)量化ALA-PDT对金黄色葡萄球菌生物膜的抗菌效果,并通过共焦激光扫描显微镜(CLSM)通过活性荧光染色使其可视化。

结果表明ALA-PDT对金黄色葡萄球菌生物膜具有很强的抗菌作用。这种处理策略十分简单,可用于开发体外模型来研究ALA-PDT治疗金黄色葡萄球菌生物膜。在未来,也可以在使用其他光敏剂用于不同细菌菌株的PDT研究中进行参考,并进行最小限度的调整。

原始出处:

Zhao KQ, Wu Y, et al., An In Vitro Model to Study the Effect of 5-Aminolevulinic Acid-mediated Photodynamic Therapy on Staphylococcus aureus Biofilm. J Vis Exp. 2018 Apr 16;(134). doi: 10.3791/57604.

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