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Table 6 The optical nanomaterial-based biosensors for the detection of circulating free DNAs or circulating tumor DNAs

From: Optical nanomaterial-based detection of biomarkers in liquid biopsy

Biomarker

Disease

Optical nanomaterial

Biorecognition element

Detection method

Matrix

Limit of detection

Linear range

Clinical sample [a]

Note

ctDNA

(PIK3CA Mutation)

Cancer

AuNPs

PNA

LSPR

Serum

50 fM

50–3200 fM

2015 [159]

ctDNA

(KRAS/PIK3CA Mutation)

Cancer

CuNPs

(+ SWNTs)

Triple-Helix Molecular Switch (THMS)

SERS

Spectroscopy

Buffer

1.5 fM

10 fM–1 nM

Serum

(n = 6)

2016 [160]

ctDNA

(Methylation)

Cancer

AuNPs and AgNPs

(+ Graphene)

Antibody

SERS

Spectroscopy

N/A

0.2 pg/uL

0.05 ng/uL–5 ng/uL

2017 [161]

ctDNA

(EGFR Mutation)

Cancer

AuNPs

Complementary DNA

Colorimetric Detection

N/A

7.7 fM

870 aM–87 pM

2018 [162]

ctDNA

Cancer

Silica-Coated Au Nanorods

Complementary DNA

SERS

Spectroscopy

Buffer

57.74 nM

100 nM–1000 nM

2019 [163]

ctDNA

(KRAS Mutation)

Cancer

AuNCs and UCNPs (NaYF4:Yb3+, Er3+)

Complementary DNA

Fluorescence

Detection

Serum

6.30 pM

5 pM–1000 pM

2020 [164]

cfDNA

(RAS Mutation)

Colorectal Cancer

AuNPs

PNA

SPR Imaging

N/A

N/A

N/A

Blood

(n = 12)

2020 [165]

ctDNA

Cancer

QDs

THMS

Fluorescence

Detection

Plasma

5.4 pM

10 pM–100 pM

2021 [166]

cfDNA

(KRAS Mutation)

Colorectal Cancer

AuNPs

PNA

SPR Imaging

Plasma

2.5 aM

0.5 − 20.0 pg/ μL

Plasma

(n = 1)

2021 [167]

ctDNA

(EGFR Mutation)

Lung Cancer

AuNPs and

Graphitic-Carbon Nitride QDs (g-CNQDs)

Complementary DNA

ECL-RET

Buffer

0.00055 fM

0.001 fM–1 pM

2021 [168]

Plasma

0.0023 fM

0.01 fM–1 pM

ctDNA

(CYFRA21-1 Mutation)

Lung Cancer

QDs

(+ Magnetic NPs)

Complementary DNA

Fluorescence

Detection

N/A

53 aM

1 fM–1 nM

2022 [169]

cfDNA

(TP53 and PIK356 Mutation)

Lung Cancer

Au–Ag Nanoshuttle

Complementary DNA

SERS

Spectroscopy

Serum

2.26 aM

(TP53)

10 aM–100 pM

Serum

(n = 120)

2022 [170]

2.34 aM

(PIK356)

10 aM–100 pM

ctDNA

(BRAF and KRAS Mutation)

Lung Cancer

Pd-Au Core–Shell Nanorods

(+ Magnetic Beads)

Complementary DNA

SERS

Spectroscopy

Buffer

3.116 aM

(BRAF)

10 aM–100 pM

2022 [171]

Mouse Serum

4.257 aM

(BRAF)

10 aM–100 pM

Buffer

3.921 aM

(KRAS)

10 aM–100 pM

Mouse Serum

6.183 aM

(KRAS)

10 aM–100 pM

ctDNA

(EGFR Mutation)

Lung Cancer

MnO2 nanosheets and Fluorescent Polydopamine NPs

Complementary DNA

SERS

Spectroscopy

Buffer

380 pM

25–125 nM

2023 [170]

ctDNA

(EGFR Mutation)

Lung Cancer

AuNPs and

CdS QDs

Complementary DNA

ECL-RET

Buffer

8.1 aM

10 aM–100 fM

2023 [172]

Plasma

91 aM

100 aM–1 pM

  1. aThe healthy donors’ biofluids, which are utilized to make model samples by spiking known concentrations of target analytes (e.g., recovery tests), are excluded here. To avoid confusion, we added only the biofluids obtained from actual patients (i.e., unknown samples) as “clinical samples” in this table