Cytotoxicity and cell membrane interactions of choline-based ionic liquids: Comparing amino acids, acetate, and geranate anions

胆碱 化学 离子液体 细胞毒性 氨基酸 离子键合 细胞膜 细胞 有机化学 生物化学 色谱法 离子 体外 催化作用
作者
Mohamad El Mohamad,Qi Han,Brendan Dyett,Haitao Yu,Sara X. Edgecomb,Mercedes C. Pride,Claylee M. Chism,Angela Roberts,Deauntaye Jones,Eden E. L. Tanner,Calum J. Drummond,Tamar L. Greaves,Jiali Zhai
出处
期刊:Chemosphere [Elsevier BV]
卷期号:364: 143252-143252
标识
DOI:10.1016/j.chemosphere.2024.143252
摘要

Ionic liquids (ILs) have found diverse applications in research and industry. Biocompatible ILs, a subset considered less toxic than traditional ILs, have expanded their applications into biomedical fields. However, there is limited understanding of the toxicity profiles, safe concentrations, and underlying factors driving their toxicity. In this study, we investigated the cytotoxicity of 13 choline-based ILs using four different cell lines: Human dermal fibroblasts (HDF), epidermoid carcinoma cells (A431), cervical cancer cells (HeLa), and gastric cancer cells (AGS). Additionally, we explored the haemolytic activity of these ILs. Our findings showed that the cytotoxic and haemolytic activities of ILs can be attributed to the hydrophobicity of the anions and the pH of the IL solutions. Furthermore, utilising quartz crystal microbalance with dissipation (QCM-D), we delved into the interaction of selected ILs, including choline acetate [Cho][Ac] and choline geranate [Cho][Ge], with model cell membranes composed of 1,2-dioleoyl- sn -glycero-3-phosphocholine (DOPC). The QCM-D data showed that ILs with higher toxicities exhibited more pronounced interactions with membranes. Increased variations in frequency and dissipation reflected substantial changes in membrane fluidity and mass following the addition of the more toxic ILs. Furthermore, total internal reflection fluorescence microscopy study revealed that [Cho][Ac] could cause lipid rearrangements and pore formation in the membrane, while [Cho][Ge] disrupted the bilayer packing. This study advances our understanding of the cellular toxicities associated with choline-based ILs and provides valuable insights into their mechanisms of action concerning IL-membrane interactions. These findings have significant implications for the safe and informed utilisation of biocompatible ILs in the realm of drug delivery and biotechnology. • IL cytotoxicity varies with anion type and pH. • Choline geranate 1:2 induces low haemolysis, causes cell shrinkage. • Choline acetate creates pores, while choline geranate 1:1 disrupts membrane. • Strong correlation between cytotoxicity, haemolytic activity, and cell membrane interactions.
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