In vivo imaging of sentinel nodes using fluorescent silica nanoparticles in living mice.

Abstract:

PURPOSE:We examine the feasibility of fluorescent imaging system for sentinel lymph node detection by using functionalized silica nanoparticles. MATERIALS AND METHODS:We developed a functionalized RITC-SiO(2) nanoparticles containing fluorescent dye, C(28)H(31)N(2)O(3)Cl (rhodamine B isothiocyanate) inside, and subsequently synthesized (68)Ga-NOTA-RITC-SiO(2) nanoparticles. RESULTS:At 5 min after RITC-doped silica nanoparticles injection, fluorescent signals were shown in both right axillary lymph node (ALN) and injection site of living mice. Fluorescent signals were also observed at these locations in a biodistribution study. In addition, fluorescence was detected in frozen ALN sections microscopically. The percentages of doses injected per gram of tissue of axillary and brachial lymph nodes near footpad treated with (68)Ga-NOTA-RITC-SiO(2) nanoparticles were 308.3 +/- 3.4 and 41.5 +/- 6.1, respectively. Little (68)Ga radioactivity was found in other organs. CONCLUSION:Our data provide strong evidence that functionalized silica nanoparticles has a promising potential as organic lymphatic tracer in biomedical imaging such as pre- and intraoperative surgical guidance.

journal_name

Mol Imaging Biol

authors

Jeon YH,Kim YH,Choi K,Piao JY,Quan B,Lee YS,Jeong JM,Chung JK,Lee DS,Lee MC,Lee J,Chung DS,Kang KW

doi

10.1007/s11307-009-0262-8

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

155-62

issue

2

eissn

1536-1632

issn

1860-2002

journal_volume

12

pub_type

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