Table 2. Selected Examples of Inorganic Nanoparticle-Based Signal Generation Probesa.
signal generation probe/method | biomarkers | signal type | equipment | sample matrix | LOD | range | assay time | diagnostic setting |
---|---|---|---|---|---|---|---|---|
AgNPs | YFV NS1, DENV NS1, and ZEBOV glycoprotein229 | colorimetric | lateral flow assay (LFA) | human serum | 150 ng/mL | NR | NR | Level 1 |
(a) MERS-CoV DNA | colorimetric | microfluidic paper analytical device (μPAD) | aqueous buffer | (a) 1.53 nM | (a) 20–10000 nM | NR | Level 1 | |
(b) MTB DNA | (b) 1.27 nM | (b) 50–2500 nM | ||||||
(c) HPV DNA231 | (c) 1.03 nM | (c) 20–2500 nM | ||||||
CdSe/ZnSQDs | (a) anti-HBV Abs | luminescent | microfluidic device | human serum | (a) 10 pM | 10–10000 pM | ∼1 h | Level 2–4 |
(b) anti-HCV Abs | (b) 3 pM | |||||||
(c) anti-gp41 Abs253 | (c) 3 pM | |||||||
dual (AuNP and QD) readout nanospheres (RNs) | EBOV glycoprotein257 | colorimetric and luminescent | lateral flow assay (LFA) | aqueous buffer/tap water, urine, and plasma | AuNPs: 2 ng/mL | AuNPs: 20−1000 ng/mL | 20 min | Level 1 or Level 2 |
QDs: 0.18 ng/mL | QDs: 2–1,000 ng/mL | |||||||
Eu3+ chelate-loaded NPs | hemagglutinin (HA) 1289 | fluorescent | lateral flow assay (LFA) | spiked human nasopharyngeal specimens | 20 HAU/mL | 10–160 HAU/mL | 15 min | Level 2 |
hepatitis B surface antigen (HBsAg)305 | fluorescent | lateral flow assay (LFA) | Aqueous buffer/Human serum | 30 pg/mL | 50–3130 pg/mL | 30 min | Level 2 | |
Y2O2S:Yb3+, Er3+ UCPs | circulating anodic antigen (CAA)317 | fluorescent | lateral flow assay (LFA) | human urine | 0.03 pg/mL | 0.03–100 pg/mL | ∼4.5 h | Level 2 |
NR = not reported.