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Article Abstract
In addition to many cellular processes, Ca is also involved in tumor initiation, progression, angiogenesis, and metastasis. The development of new tools for single-cell Ca measurement could open a new avenue for cancer therapy. The all-solid-state calcium ion-selective microelectrode (Ca-ISμE) based on carbon fiber modified with PEDOT (PSS) as solid-contact was developed in this work, and the characteristics of the Ca-ISμE have also been investigated. The Ca-ISμE exhibits a stable Nernstian response in CaCl solutions in the active range of 1.0 × 10 - 3.1 × 10 M with a low detection limit of 8.9 × 10 M. The Ca-ISμE can be connected to a patch clamp to fabricate a single-cell analysis platform for calcium monitoring of a single renal carcinoma cell. The calcium signal decreased significantly (8.6 ± 3.2 mV, n = 3) with severe fluctuations of 5.9 ± 1.8 mV when the concentration of K in the tumor microenvironment is up to 20 mM. The results indicate a severe cell response of a single renal carcinoma cell under high K stimuli. The detection system could also be used for single-cell analysis of other ions by changing different ion-selective membranes with high temporal resolution.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10098084 | PMC |
| http://dx.doi.org/10.3389/fbioe.2023.1159498 | DOI Listing |
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