Dual-color photoacoustic lymph node imaging using nanoformulated naphthalocyanines

Biomaterials. 2015 Dec:73:142-8. doi: 10.1016/j.biomaterials.2015.09.023. Epub 2015 Sep 16.

Abstract

Demarking lymph node networks is important for cancer staging in clinical practice. Here, we demonstrate in vivo dual-color photoacoustic lymphangiography using all-organic nanoformulated naphthalocyanines (referred to as nanonaps). Nanonap frozen micelles were self-assembled from two different naphthalocyanine dyes with near-infrared absorption at 707 nm or 860 nm. These allowed for noninvasive, nonionizing, high resolution photoacoustic identification of separate lymphatic drainage systems in vivo. With both types of nanonaps, rat lymph nodes buried deeply below an exogenously-placed 10 mm thick layer of chicken breast were clearly visualized in vivo. These results show the potential of multispectral photoacoustic imaging with nanonaps for detailed mapping of lymphatic drainage systems.

Keywords: Naphthalocyanines; Optoacoustic; Organic nanoparticles; Photoacoustic imaging; Sentinel lymph node mapping.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acoustics
  • Animals
  • Breast Neoplasms / diagnosis
  • Breast Neoplasms / pathology
  • Carbocyanines / chemistry*
  • Cell Movement
  • Chickens
  • Color
  • Female
  • Humans
  • Lymph Nodes / pathology*
  • Mice
  • Mice, Inbred BALB C
  • Micelles
  • Nanoparticles / chemistry*
  • Nanotechnology / methods*
  • Neoplasm Metastasis
  • Neoplasm Staging / methods
  • Optics and Photonics
  • Rats
  • Rats, Sprague-Dawley
  • Sentinel Lymph Node Biopsy
  • Spectrophotometry / methods

Substances

  • Carbocyanines
  • Micelles
  • cyanine dye 1