Indexed by:
Abstract:
Cu2+ is closely related to the occurrence and development of Wilson's disease (WD), and quantitative detection of various copper indicators (especially liver Cu-2 and urinary Cu2+) is the key step for the early diagnosis of WD in the clinic. However, the clinic Cu2+ detection approach was mainly based on testing the liver tissue through combined invasive liver biopsy and the ICP-MS method, which is painful for the patient and limited in determining WD status in real-time. Herein, we rationally designed a type of Cu2+-activated nanoprobe based on nanogapped gold nanoparticles (AuNNP) and poly(N-isopropylacrylamide) (PNIPAM) to simultaneously quantify the liver Cu2+ content and urinary Cu2+ in WD by photoacoustic (PA) imaging and ratiometric surface-enhanced Raman scattering (SERS), respectively. In the nanoprobe, one Raman molecule of 2-naphthylthiol (NAT) was placed in the nanogap of AuNNP. PNIPAM and the other Raman molecule mercaptobenzonitrile (MBN) were coated on the AuNNP surface, named AuNNP-NAT@MBN/PNIPAM. Cu2+ can efficiently coordinate with the chelator PNIPAM and lead to aggregation of the nanoprobe, resulting in the absorption red-shift and increased PA performance of the nanoprobe in the NIR-II window. Meanwhile, the SERS signal at 2223 cm(-1) of MBN is amplified, while the SERS signal at 1378 cm(-1) of NAT remains stable, generating a ratiometric SERS I-2223/I-1378 signal. Both NIR-II PA(1250 nm) and SERS I-2223/I-1378 signals of the nanoprobe show a linear relationship with the concentration of Cu2+. The nanoprobe was successfully applied for in vivo quantitative detection of liver Cu2+ of WD mice through NIR-II PA imaging and accurate quantification of urinary Cu2+ of WD patients by ratiometric SERS. We anticipate that the activatable nanoprobe might be applied for assisting an early, precise diagnosis of WD in the clinic in the future.
Keyword:
Reprint 's Address:
Email:
Version:
Source :
ACS NANO
ISSN: 1936-0851
Year: 2021
Issue: 2
Volume: 15
Page: 3402-3414
1 8 . 0 2 7
JCR@2021
1 5 . 8 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:142
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 65
SCOPUS Cited Count: 57
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
Affiliated Colleges: