(368e) Synthesis of Metal-Organic Frameworks (MOFs) and Evaluation of Their Toxicological Profiles.
AIChE Annual Meeting
Tuesday, November 15, 2022 - 3:30pm to 5:00pm
The exposure and implementation of MOFs however needs to be evaluated because of possible antagonistic interactions of such frameworks with given biosystems. For instance, Su et al. utilized in vitro toxicity evaluations to assess the cytotoxic effects of medi-MOF-1. Pancreatic cancer cells (BxPC-3) were exposed to the MOFs and assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Results showed that there was a cell growth inhibition in a dose-dependent manner, specifically, exposure to 50 Âµg/ml MOFs caused the highest levels of cell death18. Chen et al., exposed MIL-160(Fe) MOFs to human normal liver and hepatocellular carcinoma cells. A decrease in cell viability in dose-dependent manner was observed and the cause of toxicity was due to the MOFsâ metal component19. While these in vitro toxicity studies helped correlate toxicological pathways function of both MOFsâ physicochemical characteristics and their synthesis method cyto- and genotoxic effects and their possible synergism in how they account for homeostatic cellular changes have been sparse. Moreover, the ability to identify any cell generational transformation and propagation of such transformation upon framework exposure is currently lacking. Further, in vivo toxicity evaluations were focused on limited MOFs and only revealed weak mechanistic analysis or minimal toxicological pathways identification. Without such correlations and analysis, framework deleterious effects (when individual or when in synthesized structures) are difficult to assess and control. As such, lack of analysis and evaluation of toxicological profiles could jeopardize the implementation of the frameworks in consumer applications.
This project aims to investigate the toxicological profiles of selected MOFs and their thin films to determine mechanisms of toxicity before consumer implementation. The objective is to contribute to the understanding of MOFs deleterious effects, both using cyto- and genotoxic approaches as well as real-time, high throughput strategies. The proposed methods involve synthesizing and characterizing selected MOFs and their thin films and exposing such frameworks and films to human epithelial cells, where the lung cells serve as model for the toxicity of target system (i.e., lungs). Prior to exposure, the MOFs/thin films are characterized by microscopical and spectroscopical techniques to determine their physicochemical characteristics. Subsequently, upon exposure frameworks, films and cell systems are investigated using both microscopy and cellular assay. Our results show that the frameworks affect cells in a dose-dependent manner with such effects being function of the materialsâ physico-chemical properties. Possible mechanisms responsible for cell toxicity are also derived from systems characteristics. Such studies could not only lead to rationale, safe-by-design strategies development of nanomaterials and nanomaterials films for biotechnological implementation but further, could also allow for user-controlled implementation of such structures.
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