Electrochemical biosensing based comparative study of monoclonal antibodies against SARS-CoV-2 nucleocapsid protein

被引：14

作者：

Drobysh, Maryia ^{[1
,2
]}

Liustrovaite, Viktorija ^{[2
]}

Kanetski, Yahor ^{[2
]}

Brasiunas, Benediktas ^{[2
]}

Zvirbliene, Aurelija ^{[3
]}

Rimkute, Agne ^{[3
]}

Gudas, Dainius ^{[3
]}

Kucinskaite-Kodze, Indre ^{[3
]}

Simanavicius, Martynas ^{[3
]}

Ramanavicius, Simonas ^{[1
]}

Slibinskas, Rimantas ^{[2
,3
]}

Ciplys, Evaldas ^{[2
,3
]}

Plikusiene, Ieva

Ramanavicius, Arunas ^{[1
]}

机构：

[1] State Res Inst, Ctr Phys Sci & Technol, Sauletekio Ave 3, Vilnius, Lithuania

[2] Vilnius Univ, Fac Chem & Geosci, Dept Phys Chem, Naugarduko Str 24, LT-03225 Vilnius, Lithuania

[3] Vilnius Univ, Life Sci Ctr, Sauletekio Ave 7, Vilnius, Lithuania

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2024年 / 908卷

关键词：

Monoclonal antibodies (mAbs); Gold nanoparticles (AuNP); COVID-19; SARS-CoV-2; virus; Electrochemical immunosensor; Differential pulse voltammetry (DPV); Cyclic voltammetry (CV); Pulsed amperometric detection (PAD); Self-assembled monolayer (SAM); Antigen-antibody complex; Nucleocapsid protein; PULSED AMPEROMETRIC DETECTION; GOLD ELECTRODES; L-CYSTEINE; NANOPARTICLES; COPPER;

D O I：

10.1016/j.scitotenv.2023.168154

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, we are reporting an electrochemical biosensor for the determination of three different clones of monoclonal antibodies (mAbs) against the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) re-combinant nucleocapsid protein (rN). The nucleocapsid protein was chosen as a system component identifying and discriminating antibodies that occur after virus infection instead of S protein used in serological tests to measure antibodies raised after vaccination and infection. The sensing platform was based on a screen-printed carbon electrode (SPCE) covered with gold nanoparticles (AuNP) and subsequently modified with a self -assembled monolayer (SAM) to ensure the covalent immobilization of the rN. The interaction between the protein and three clones of mAbs against SARS-CoV-2 rN with clone numbers 4G6, 7F10, and 1A6, were elec-trochemically registered in the range of concentrations. Three techniques, cyclic voltammetry (CV), differential pulse voltammetry (DPV), and pulse amperometric detection (PAD) were used for the detection. A gradual change in the responses with an increase in mAbs concentration for all techniques was observed. To assess the performance of the developed electrochemical biosensor, 'complexation constant' (KC), limit of detection (LOD), and limit of quantification (LOQ) were calculated for all assessed clones of mAbs and all used techniques. Our results indicated that DPV possessing higher fitting accuracy illustrated more significant differences in KC con-stants and LOD/LOQ values. According to the DPV results, 7F10 clone was characterized with the highest KC value of 1.47 +/- 0.07 mu g/mL while the lowest LOD and LOQ values belonged to the 4G6 clone and equaled 0.08 +/- 0.01 and 0.25 +/- 0.01 mu g/mL, respectively. Overall, these results demonstrate the potential of electrochemical techniques for the detection and distinguishing of different clones of mAbs against SARS-CoV-2 nucleocapsid protein.

引用

页数：12

共 74 条

[1] Label-free electrochemical aptasensor for the detection of SARS-CoV-2 spike protein based on carbon cloth sputtered gold nanoparticles [J].