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Bi-module sensing device to in situ quantitatively detect hydrogen peroxide released from migrating tumor cells
Ling Yu1, YunLi Tian1, AnXiu Gao1
1Institute for Clean energy & Advanced Materials, Faculty of Materials & Energy, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Chongqing 400715, China; Chongqing Engineering Research Center for Rapid diagnosis of Fatal Diseases, Chongqing 400715, China.
Researchers developed a novel device to monitor biochemical molecules during cell migration in situ. This platform quantifies hydrogen peroxide (H2O2) production, aiding in understanding cell motility and tumor metastasis mechanisms.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Analytical Chemistry
Background:
- Cell migration is crucial in physiological and pathological processes, particularly tumor metastasis.
- Conventional assays struggle to monitor key biochemical molecules during in situ cell migration.
- Understanding cell migration requires methods to simultaneously assess cell function and molecular production.
Purpose of the Study:
- To develop and validate a novel device integrating electrochemical sensing and trans-well cell migration modules.
- To enable sensitive, in situ quantification of biochemical molecules released during cell migration.
- To characterize hydrogen peroxide (H2O2) production and cell migration rates in various cancer cell lines.
Main Methods:
- Fabrication of a bi-module device with electrochemical sensing and trans-well migration capabilities.
- Functionalization of the electrode with a multi-wall carbon nanotube/graphene/MnO2 nanocomposite.
- Quantification of H2O2 production using electrochemical sensing during chemotaxis.
- Assessment of cell migration rates via staining of the trans-well membrane.
Main Results:
- The device successfully characterized H2O2 production in melanoma (A375), larynx carcinoma (HEp-2), and liver cancer (Hep G2) cells.
- Peak H2O2 concentrations ranged from 63 ± 0.7 nM to 130 ± 1.3 nM, with varying times to reach peak production.
- Average cell migration rates were determined as 98 ± 6% for A375, 38 ± 4% for HEp-2, and 32 ± 3% for Hep G2 cells.
Conclusions:
- The novel bi-module platform enables simultaneous in situ investigation of cell secretion and cell function.
- This technology holds potential for characterizing cell motility by monitoring H2O2 production, even in rare samples.
- The device facilitates identifying underlying mechanisms of cell migration and could aid in cancer research.
