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Mokni M, Tlili A, Khalij Y, Attia G, Zerrouki C, Hmida W, Othmane A, Bouslama A, Omezzine A, Fourati N. Designing a Simple Electrochemical Genosensor for the Detection of Urinary PCA3, a Prostate Cancer Biomarker. MICROMACHINES 2024; 15:602. [PMID: 38793175 PMCID: PMC11123437 DOI: 10.3390/mi15050602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 05/26/2024]
Abstract
This study investigates the feasibility of a simple electrochemical detection of Prostate Cancer Antigen 3 (PCA3) fragments extracted from patients' urine, using a thiolated single-strand DNA probe immobilized on a gold surface without using a redox probe. To enhance the PCA3 recognition process, we conducted a comparative analysis of the hybridization location using two thiolated DNA probes: Probe 1 targets the first 40 bases, while Probe 2 targets the fragment from bases 47 to 86. Hybridization with PCA3 followed, using square wave voltammetry. The limit of detection of the designed genosenors were of the order of (2.2 ng/mL), and (1.6 ng/mL) for Probes 1 and 2, respectively, and the subsequent sensitivities were of the order of (0.09 ± 0.01) µA-1 · µg-1 · mL and (0.10 ± 0.01) µA-1 · µg-1 · mL. Specificity tests were then conducted with the sensor functionalized with Probe 2, as it presents better analytical performances. The electrochemical results indicate that the designed sensor can clearly discriminate a complementary target from a non-complementary one. A further modeling of the calibration curves with the Power Law/Hill model indicates that the dissociation constant increases by one order of magnitude, confirming the ability of the designed sensor to perfectly discriminate complementary targets from non-complementary ones.
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Affiliation(s)
- Meriem Mokni
- SATIE Laboratory, UMR CNRS 8029, Cnam, 292 rue Saint Martin, 75003 Paris, France; (M.M.); (A.T.); (G.A.); (C.Z.)
- Biochemistry Department, LR12SP11, Sahloul University Hospital, Route Ceinture Sahloul, Sousse 4054, Tunisia; (Y.K.); (A.B.); (A.O.)
| | - Amal Tlili
- SATIE Laboratory, UMR CNRS 8029, Cnam, 292 rue Saint Martin, 75003 Paris, France; (M.M.); (A.T.); (G.A.); (C.Z.)
- LIMA Laboratory, Faculty of Medicine of Monastir, University of Monastir, Avenue Avicenne, Monastir 5019, Tunisia;
| | - Yassine Khalij
- Biochemistry Department, LR12SP11, Sahloul University Hospital, Route Ceinture Sahloul, Sousse 4054, Tunisia; (Y.K.); (A.B.); (A.O.)
| | - Ghada Attia
- SATIE Laboratory, UMR CNRS 8029, Cnam, 292 rue Saint Martin, 75003 Paris, France; (M.M.); (A.T.); (G.A.); (C.Z.)
| | - Chouki Zerrouki
- SATIE Laboratory, UMR CNRS 8029, Cnam, 292 rue Saint Martin, 75003 Paris, France; (M.M.); (A.T.); (G.A.); (C.Z.)
| | - Wissem Hmida
- Sahloul University Hospital, Urology Department, Street Route Ceinture Sahloul, Sousse 4054, Tunisia;
| | - Ali Othmane
- LIMA Laboratory, Faculty of Medicine of Monastir, University of Monastir, Avenue Avicenne, Monastir 5019, Tunisia;
| | - Ali Bouslama
- Biochemistry Department, LR12SP11, Sahloul University Hospital, Route Ceinture Sahloul, Sousse 4054, Tunisia; (Y.K.); (A.B.); (A.O.)
- Faculty of Pharmacy of Monastir, University of Monastir, Avenue Ibn Sina, Monastir 5000, Tunisia
| | - Asma Omezzine
- Biochemistry Department, LR12SP11, Sahloul University Hospital, Route Ceinture Sahloul, Sousse 4054, Tunisia; (Y.K.); (A.B.); (A.O.)
- Faculty of Pharmacy of Monastir, University of Monastir, Avenue Ibn Sina, Monastir 5000, Tunisia
| | - Najla Fourati
- SATIE Laboratory, UMR CNRS 8029, Cnam, 292 rue Saint Martin, 75003 Paris, France; (M.M.); (A.T.); (G.A.); (C.Z.)
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