Portable pH meter-based competitive immunoassay of E-selectin using urease-encapsulated metal-organic frameworks.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Portable pH meter-based competitive immunoassay of E-selectin using urease-encapsulated metal-organic frameworks.
Συγγραφείς: Xie Y; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, PR China., He X; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, PR China., Yu R; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, PR China., Jin Y; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, PR China., Tan L; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, PR China. Electronic address: liangtan@hunnu.edu.cn.
Πηγή: Talanta [Talanta] 2025 May 15; Vol. 287, pp. 127613. Date of Electronic Publication: 2025 Jan 17.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 2984816R Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3573 (Electronic) Linking ISSN: 00399140 NLM ISO Abbreviation: Talanta Subsets: MEDLINE
Imprint Name(s): Publication: Amsterdam : Elsevier
Original Publication: Oxford : Pergamon Press
Ιατρικοί όροι (MeSH): Urease*/chemistry , Urease*/metabolism , Metal-Organic Frameworks*/chemistry , Enzymes, Immobilized*/chemistry , Enzymes, Immobilized*/metabolism , E-Selectin*/analysis , E-Selectin*/immunology, Immunoassay/methods ; Immunoassay/instrumentation ; Nanocomposites/chemistry ; Hydrogen-Ion Concentration ; Humans
Περίληψη: E-selectin (CD62E) is an adhesion molecule expressed on the surface of endothelial cells (ECs) and its level increases significantly upon the stimulation of ECs by inflammatory factors. Quantitative analysis of CD62E is of great importance to early diagnosis and treatment of vascular diseases and hypertension. A new method for the determination of CD62E was developed using a portable pH meter in this work. Two nanocomposites, urease-encapsulated and CD62E antibody-linked zeolitic imidazolate framework-8 (U@ZIF-8-Ab) and CD62E protein-coated Fe3O4 magnetic beads (MB-CD62E), were prepared successfully. MOF shells of U@ZIF-8-Ab provided an effective protection against inactivation for urease. The reaction product of two nanocomposites, which was collected via magnetic separation, catalyzed the hydrolysis of urea and led to the increase in pH of the substrate solution. CD62E could competitively react with U@ZIF-8-Ab, inhibiting the binding of two nanocompoaites. Due to the reduction of urease in the magnetically separated product, the hydrolysis of urea was limited and the pH increasing extent declined. The pH difference was found to be linearly related to the logarithm of the CD62E concentration from 0.02 to 500 ng mL-1 with a detection limit of 9.28 pg mL-1. The developed method displayed some advantages, such as good selectivity, reproducibility and stability, low-dose reagents, and simple measurement procedure. This work provides a valuable sample for immunoassay and biosensing using enzyme-encapsulated metal-organic frameworks and portable pH meter as signal readout.
(Copyright © 2025 Elsevier B.V. All rights reserved.)
Competing Interests: Declaration of competing interest The authors declare that they have no conflicts of interest to this work.
Contributed Indexing: Keywords: Competitive immunoassay; E-Selection; Portable pH meter; Urea hydrolysis; Urease-encapsulated MOFs
Substance Nomenclature: EC 3.5.1.5 (Urease)
0 (Metal-Organic Frameworks)
0 (Enzymes, Immobilized)
0 (E-Selectin)
Entry Date(s): Date Created: 20250125 Date Completed: 20250503 Latest Revision: 20250524
Update Code: 20260130
DOI: 10.1016/j.talanta.2025.127613
PMID: 39862514
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1873-3573
DOI:10.1016/j.talanta.2025.127613