1Department of Physics, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, 51513, India
2Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, 515134, India
3Laboratory of Molecular Virology, Center for Biologics Evaluation and Research (CBER), Food and Drug Administration, Silver Spring, MD 20993, USA
Adv. Mater. Lett., 2017, 8 (4), pp 472-480
DOI: 10.5185/amlett.2017.6579
Publication Date (Web): Mar 14, 2017
Copyright © IAAM-VBRI Press
E-mail: vrkamisetti@gmail.com
Streptavidin labelled fluorescent ZnO nanoparticles have been surface engineered to develop a fluorescent ZnO nanoparticle linked immunoassay (FZLIA) for the sensitive detection of HIV infection. ZnO nanoparticles were synthesized by a single step chemical precipitation method. Cysteine was used to graft carboxyl groups on to the surface of nanoparticles in a single step. Cysteine capped ZnO nanoparticles exhibited fluorescence at 546 nm when excited with 358 nm and FESEM confirmed the particle size to be 50-70 nm. FTIR and TGA confirmed the functionalisation of carboxyl groups by cysteine. The amount of cysteine grafted on the ZnO nanoparticles calculated as 68.1% from TGA analysis indicated the presence of large amount of carboxyl groups. ZnO nanoparticles were conjugated to streptavidin and the same were deployed as fluorescent probes in the development of the FZLIA platform for the early and accurate detection of HIV infection. The linear dose dependent detection range was from 25 pg/mL to 1000 pg/mL. HIV positive and HIV negative plasma samples were tested using FZLIA for the presence of HIV-1 p24 antigen. This immunoassay exhibited no false positive and false negative results with the clinical samples tested. This highly sensitive HIV-1 p24 antigen assay may be useful to improve blood safety by reducing the antibody negative window period in blood donors in resource limited settings where nucleic acid testing is not practical or feasible. This technology can be transferred to a lab-on-chip platform for use in resource limited settings and can also be easily adopted for the detection of other antigens.
ZnO nanoparticles, fluorescence, immunoassay, HIV-1, p24 antigen, streptavidin.
Perspectives on Published Energy Sources and Smart Energy Supplies
State of Art Review on Nanobubbles
Eggshell Membrane Assisted CdS Nanoparticles for Manganese Removal in Water Treatment
Green Chemistry Synthesis of Nano-Hydroxyapatite using Natural Stabilisers
Structural, Optical and Electrical Properties of CaSnO3 and Ca0.98Nd0.02Sn0.98Ti0.02O3 Synthesized using Sol-Gel Method
Phase Change Materials Reinforced with Aluminium Foam for Latent Heat Storage
Influence of Manganese and Copper Doping on Structural and Optical Properties of Chromium Oxide Nanoparticles
Understanding of intriguing metal to semiconductor transition in Ni0.5Zn0.5Fe2O4 nanoparticulates
Flaw Resistance and Mode - I Fracture Energy Redistribution in Bamboo - A Correlation
COVID-19: A Significant Revival Approach - Concurrent Case Study in India
Recent Advances in Biochar Modification for Energy Storage in Supercapacitors: A Review
Viral Evolution of Multiple Coronavirus Genomes on Genomic Index Maps
Solution Combustion Synthesis and Energy Transfer in LaMgAl11O19:Tb3+/Sm3+ Tunable Phosphor
Influence of Fe3O4 and CTABr on the Rate of Degradation of Methylene Blue by H2O2
Effect of Sulfurization Temperature on RF Sputtered MoS2 Thin Film
Fatigue Analysis for Fe-34.5Mn-l0Al-0.76C Tidal Turbine Blades using Rainflow Algorithm
Modelling for the Study of Thermoelastic Properties of Nanoparticles
Potato Starch Edible Films as Environmentally Friendly Carriers for Model Drug: In vitro Release Study