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Molecular Imaging and Therapy with Perfluorocarbon Nanoparticulates: Environmental Impact.

This study investigates the environmental impact of perfluorocarbon nanoparticulates used in molecular imaging and therapy applications. It explores their use in vitreous replacement, liquid ventilation, targeted contrast enhancement, and fibrin imaging. The study also discusses the detection of angiogenesis and targeted drug delivery using these nanoparticles.

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Molecular Imaging and Therapy with Perfluorocarbon Nanoparticulates: Environmental Impact.

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  1. Molecular Imaging and Therapy with Perfluorocarbon Nanoparticulates: Environmental Impact. Washington University Medical School Saint Louis, MO

  2. Perfluorocarbon Biomedical Applications Vitreous Replacement Liquid Ventilation

  3. After Before Targeted Contrast Fibrin RBC 0.5 µ 0.5 µ 0.5 µ Clot Clot 1 mm 1 mm Suture Suture Fibrin Imaging Scanning EM clot labeled with fibrin targeted nanoparticles Ultrasound contrast enhancement of fibrin clot in vitro using conventional clinical scanner (7.5 MHz) Control Thrombus Targeted Thrombus

  4. a a a a a a b b b b b b Non Non Non Non Non Non - - - - - - Targeted - - - - - - Targeted n 3 3+ 3+ 3+ 3+ 3+ 3+ Gd Gd Gd Gd Gd Gd Ions / Particle Ions / Particle Ions / Particle Ions / Particle Ions / Particle Ions / Particle 94,400 94,400 94,400 94,400 94,400 94,400 92,400 92,400 92,400 92,400 92,400 92,400 - - - - - - 1 1 1 1 1 1 r r r r r r (s* (s* (s* (s* (s* (s* mM mM mM mM mM mM ) ) ) ) ) ) [ [ [ [ [ [ Gd Gd Gd Gd Gd Gd ] ] ] ] ] ] 19.1 19.1 19.1 19.1 19.1 19.1 21.1 21.1 21.1 21.1 21.1 21.1 1 1 1 1 1 1 - - - - - - 1 1 1 1 1 1 r r r r r r (s* (s* (s* (s* (s* (s* mM mM mM mM mM mM ) ) ) ) ) ) [ [ [ [ [ [ Gd Gd Gd Gd Gd Gd ] ] ] ] ] ] 22.9 22.9 22.9 22.9 22.9 22.9 24.6 24.6 24.6 24.6 24.6 24.6 2 2 2 2 2 2 - - - - - - - - - 1 1 1 1 1 1 1 1 1 1,800,000 1,800,000 1,800,000 1,800,000 1,800,000 1,800,000 1,800,000 1,800,000 1,800,000 1,950,000 1,950,000 1,950,000 1,950,000 1,950,000 1,950,000 1,950,000 1,950,000 1,950,000 r r r r r r (s* (s* (s* (s* (s* (s* mM mM mM mM mM mM mM mM mM ) ) ) ) ) ) ) ) ) [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] 1 1 1 1 1 1 - - - - - - - - - - - - - - - - - - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 r r r r r r r r r r r r r r r r r r (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* (s* mM mM mM mM mM mM mM mM mM mM mM mM mM mM mM mM mM mM ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] [Particle] 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,160,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2,270,000 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Targeted Nanoparticles Support Enormous Paramagnetic Payloads

  5. Detection of Angiogenesis in the Vx-2 Model

  6. Masses Seen By MRI Were Not Always Vx-2 Tumors After avB3-Nanoparticles T2-Weighted MRI Histology Revealed Rejected Tumor Infiltrated with Inflammatory Cells

  7. No Molecular Imaging of Angiogenesis for Tumors in Rejection Histology Revealed Rejected Tumor Infiltrated with Inflammatory Cells

  8. Melanoma Angiogenesis: Detection With avb3 Integrin-Targeted Paramagnetic Nanoparticles Mouse Imaging @ 1.5T Time 0 min syringe 2 mm tumor Time 120 min Angiogenesis around 2 mm melanoma tumor Time course

  9. Time course of MRI Contrast Enhancement Percent Enhancement Time (min) Post Injection

  10. Site-Targeted Drug Delivery Target Cell 1. Load with drug 3. Drug effect D D D 2. Particles bind to cell surface Targeting Element 0.5 µ

  11. Novel Mechanisms Of Drug Delivery: “Contact Facilitated Drug Delivery*” Rhodamine-labeled NP *Lanza GM, Wickline SA et al: Targeted antiproliferative drug delivery to vascular smooth muscle cells with magnetic resonance imaging nanoparticle contrast agent: implications for rational therapy of restenosis. Circulation 2002; 106:2842-2847 GFP-linked endocytotic markers rab5 and rab7 in transfected C32 melanoma cells

  12. Antiproliferative Effects of Free versus Tissue Factor - Targeted Paclitaxel Nanoparticles on Vascular Smooth Muscle Cells 30 25 20 CELL COUNT X 10,000 15 * * 10 5 0 Control Taxol 0.2 mol % Taxol 2.0 mol % NANOPARTICLE FORMULATION NON -TARGETED NANOPARTICLES TARGETED NANOPARTICLES

  13. Rejection of Mouse Melanoma 7d following anb3-Targeted, DXR, Paramagnetic Nanoparticles Control 3/3 anb3-DXR-NP (4/4)

  14. Proton and Fluorine Imaging Clot Proton Imaging Fluorine Imaging

  15. Dosimetry of Targeted Nanoparticle Levels 15:5 Crown-Ether PFOB

  16. Typical Pharmaceutical Emulsification Process Alliance Pharmaceutical Oxygent Production

  17. President Bush: reduce the greenhouse gas intensity of the U.S. economy by 18% over the next ten years. Perfluorocarbons have 10,000 times the global warming impact of carbon dioxide • Major PFC applications: • electronic insulators • aluminum smelting • refrigerants • subsurface barrier testing

  18. EPA suggested four options for its formal definition of "leak rate." : • "annualizing" method. • "rolling-average" method • the higher calculated leak rate. • consistent method Non-VOC with no significant participation in ozone formation in ambient air.

  19. Medical Gregory Lanza, MD, PhD Samuel Wickline, M.D. WU Personnel • MR & US Science • Patrick Winter, Ph.D. • Michael Hughes, Ph.D • Jon Marsh, Ph.D • Frank Hockett, M.S.E.E. • Michal Lijowski PhD • Grace Hu, M.S. • Anagana Pan Ph.D • Technical • Mary Watkins, R.T. (MR) • Todd Williams, B.S., R.T. (MR) • Rosa Lin, M.S. • Brian Hennery, B.S. • Ralph Fuhrhop • Huiying Zhang, M.D. • Stacy Allen, B.S. • Liz Lacy, B.S. • Peggy Brown, RDCS • Michael Scott, BS • Anne Schmeider, M.S. • Kathy Crowder, MS

  20. Key Collaborators Philips Medical Systems David Rollo MD Horace Hines PhD Ling Shao PhD Carmen van Vilsteren PhD Christopher Hall PhD Shelton Caruthers PhD The Dow Chemical Co. Jaime Simon PhD Garry Kiefer PhD Phillip Athey PhD Gyongyi Gulyas PhD Keith Frank PhD Consultants Sam Achilefu PhD Wynn Volkert PhD Richard Holmes PhD Patrick Gaffney PhD Bristol-Myers Squibb Medical Imaging D. Scott Edwards Stephen Haber Thomas Harris

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