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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Biomed+Eng
2017 ; 1
(11
): 914-924
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Non-destructive two-photon excited fluorescence imaging identifies early nodules
in calcific aortic-valve disease
#MMPMID29456878
Baugh LM
; Liu Z
; Quinn KP
; Osseiran S
; Evans CL
; Huggins GS
; Hinds PW
; Black LD 3rd
; Georgakoudi I
Nat Biomed Eng
2017[Nov]; 1
(11
): 914-924
PMID29456878
show ga
Calcifications occur during the development of healthy bone, and at the onset of
calcific aortic-valve disease (CAVD) and many other pathologies. Although the
mechanisms regulating early calcium deposition are not fully understood, they may
provide targets for new treatments and for early interventions. Here, we show
that two-photon excited fluorescence (TPEF) can provide quantitative and
sensitive readouts of calcific nodule formation, in particular in the context of
CAVD. Specifically, by means of the decomposition of TPEF spectral images from
excised human CAVD valves and from rat bone prior to and following
demineralization, as well as from calcific nodules formed within engineered gels,
we identified an endogenous fluorophore that correlates with the level of
mineralization in the samples. We then developed a ratiometric imaging approach
that provides a quantitative readout of the presence of mineral deposits in early
calcifications. TPEF should enable non-destructive, high-resolution imaging of
three-dimensional tissue specimens for the assessment of the presence of
calcification.