Nanoscale Res Lett:石墨烯的抗菌性能及细胞毒性如何?

2017-11-01 MedSci MedSci原创

近年来,石墨烯(G)和氧化石墨烯(GO)纳米颗粒已经开始应用于手术植入物的表面修饰中。然而,G和GO的生物安全性和抗菌能力尚不清楚。在本研究中,通过与骨髓间充质干细胞(BMSCs)共同培养来评估体外G和GO的生物安全性,并通过将材料植入小鼠肌肉组织中观察生物安全性。生物安全性结果显示,10μg/ml是G和GO的安全临界浓度。当浓度超过10μg/ml时,G和GO的细胞毒性呈剂量依赖性。抗菌结果表明,

近年来,石墨烯(G)和氧化石墨烯(GO)纳米颗粒已经开始应用于手术植入物的表面修饰中。然而,G和GO的生物安全性和抗菌能力尚不清楚。在本研究中,通过与骨髓间充质干细胞(BMSCs)共同培养来评估体外G和GO的生物安全性,并通过将材料植入小鼠肌肉组织中观察生物安全性。

生物安全性结果显示,10μg/ml是G和GO的安全临界浓度。当浓度超过10μg/ml时,G和GO的细胞毒性呈剂量依赖性。

抗菌结果表明,G的浓度≥100μg/ml具有抗菌能力,GO≥50μg/ml具有抗菌能力。在体外,G和GO的抗菌作用呈剂量依赖性。

因此,GO或G的浓度在50和100μg/ml之间可能是保持细胞毒性和抗菌能力平衡的较好的范围。

总之,该研究表明,在一定浓度范围内G和GO具有良好生物安全性和抗菌性,具有潜在的临床用途。

原始出处:


Long Pang, Chunqiu Dai, et al., Biosafety and Antibacterial Ability of Graphene and Graphene Oxide In Vitro and In Vivo. Nanoscale Res Lett. 2017; 12: 564. Published online 2017 Oct 12. doi: 10.1186/s11671-017-2317-0

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    2017-11-01 戒馋,懒,贪

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尽管科学技术飞速发展,癌症检测方法及治疗方法都有迅猛的进展,但是癌症仍然是目前死亡率最高的疾病之一,其中的血液相关癌症(如白血病等)死亡率极高。目前癌症的常见治疗方法之一便是化疗,但是化疗存在一系列问题,如药物会在正常组织中富集、肿瘤药物浓度达不到有效浓度、系统毒性、无法监测疗效及产生多药耐药性等。其中对正常组织的毒副作用是一个最主要的问题,直接关乎病人的生存质量。纳米材料由于可以增加药物肿瘤富集