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2017 ; 114
(5
): 962-967
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English Wikipedia
Molecular imaging of biological systems with a clickable dye in the broad 800- to
1,700-nm near-infrared window
#MMPMID28096386
Zhu S
; Yang Q
; Antaris AL
; Yue J
; Ma Z
; Wang H
; Huang W
; Wan H
; Wang J
; Diao S
; Zhang B
; Li X
; Zhong Y
; Yu K
; Hong G
; Luo J
; Liang Y
; Dai H
Proc Natl Acad Sci U S A
2017[Jan]; 114
(5
): 962-967
PMID28096386
show ga
Fluorescence imaging multiplicity of biological systems is an area of intense
focus, currently limited to fluorescence channels in the visible and first
near-infrared (NIR-I; ?700-900 nm) spectral regions. The development of
conjugatable fluorophores with longer wavelength emission is highly desired to
afford more targeting channels, reduce background autofluorescence, and achieve
deeper tissue imaging depths. We have developed NIR-II (1,000-1,700 nm) molecular
imaging agents with a bright NIR-II fluorophore through high-efficiency click
chemistry to specific molecular antibodies. Relying on buoyant density
differences during density gradient ultracentrifugation separations, highly pure
NIR-II fluorophore-antibody conjugates emitting ?1,100 nm were obtained for use
as molecular-specific NIR-II probes. This facilitated 3D staining of ?170-?m
histological brain tissues sections on a home-built confocal microscope,
demonstrating multicolor molecular imaging across both the NIR-I and NIR-II
windows (800-1,700 nm).