Optimization of In Vivo Studies by Combining Planar Dynamic and Tomographic Imaging: Workflow Evaluation on a Superparamagnetic Nanoparticles System.
Maritina RouchotaAlessio AdamianoMichele IafiscoEirini FragogeorgiIrineos PilatisGilles DoumontSébastien BoutryDaniele CatalucciArgyro ZacharioudakiGeorge C KagadisPublished in: Molecular imaging (2021)
Molecular imaging holds great promise in the noninvasive monitoring of several diseases with nanoparticles (NPs) being considered an efficient imaging tool for cancer, central nervous system, and heart- or bone-related diseases and for disorders of the mononuclear phagocytic system (MPS). In the present study, we used an iron-based nanoformulation, already established as an MRI/SPECT probe, as well as to load different biomolecules, to investigate its potential for nuclear planar and tomographic imaging of several target tissues following its distribution via different administration routes. Iron-doped hydroxyapatite NPs (FeHA) were radiolabeled with the single photon γ-emitting imaging agent [99mTc]TcMDP. Administration of the radioactive NPs was performed via the following four delivery methods: (1) standard intravenous (iv) tail vein, (2) iv retro-orbital injection, (3) intratracheal (it) instillation, and (4) intrarectal installation (pr). Real-time, live, fast dynamic screening studies were performed on a dedicated bench top, mouse-sized, planar SPECT system from t = 0 to 1 hour postinjection (p.i.), and consequently, tomographic SPECT/CT imaging was performed, for up to 24 hours p.i. The administration routes that have been studied provide a wide range of possible target tissues, for various diseases. Studies can be optimized following this workflow, as it is possible to quickly assess more parameters in a small number of animals (injection route, dosage, and fasting conditions). Thus, such an imaging protocol combines the strengths of both dynamic planar and tomographic imaging, and by using iron-based NPs of high biocompatibility along with the appropriate administration route, a potential diagnostic or therapeutic effect could be attained.
Keyphrases
- high resolution
- quantum dots
- heart failure
- gene expression
- blood pressure
- magnetic resonance imaging
- low dose
- type diabetes
- computed tomography
- squamous cell carcinoma
- insulin resistance
- magnetic resonance
- adipose tissue
- machine learning
- young adults
- deep learning
- mass spectrometry
- pet ct
- risk assessment
- metabolic syndrome
- cone beam
- skeletal muscle
- peripheral blood
- lymph node metastasis
- case control
- body composition
- human health