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Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2023

Cytochrome c oxidase deficiency detection in human fibroblasts using scanning electrochemical microscopy

Shubhneet Thind
  • Fonction : Auteur
Dhésmon Lima
  • Fonction : Auteur
Evan Booy
  • Fonction : Auteur
Sean Mckenna
Sabine Kuss
  • Fonction : Auteur

Résumé

Cytochrome c oxidase deficiency (COXD) is an inherited disorder characterized by the absence or mutation in the genes encoding for the cytochrome c oxidase protein (COX). COX deficiency results in severe muscle weakness, heart, liver, and kidney disorders, as well as brain damage in infants and adolescents, leading to death in many cases. With no cure for this disorder, finding an efficient, inexpensive, and early means of diagnosis is essential to minimize symptoms and long-term disabilities. Furthermore, muscle biopsy, the traditional detection method, is invasive, expensive, and time-consuming. This study demonstrates the applicability of scanning electrochemical microscopy to quantify COX activity in living human fibroblast cells. Taking advantage of the interaction between the redox mediator N, N, N′, N′ -tetramethyl- para -phenylene-diamine, and COX, the enzymatic activity was successfully quantified by monitoring current changes using a platinum microelectrode and determining the apparent heterogeneous rate constant k 0 using numerical modeling. This study provides a foundation for developing a diagnostic method for detecting COXD in infants, which has the potential to increase treatment effectiveness and improve the quality of life of affected individuals.
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Dates et versions

hal-04457632 , version 1 (14-02-2024)

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Shubhneet Thind, Dhésmon Lima, Evan Booy, Dao Trinh, Sean Mckenna, et al.. Cytochrome c oxidase deficiency detection in human fibroblasts using scanning electrochemical microscopy. Proceedings of the National Academy of Sciences of the United States of America, 2023, 121 (1), ⟨10.1073/pnas.2310288120⟩. ⟨hal-04457632⟩
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