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Abstract

Medicine

Synthesis, Characterization, and Application of Superparamagnetic Iron Oxide Nanoprobes for Extrapulmonary Tuberculosis Detection

Published: February 16th, 2020

DOI:

10.3791/58227

1Department of Pulmonary and Critical Care Medicine, Taipei Medical University-Shuang Ho Hospital, 2Department of Research and Department of Dentistry, Taipei Medical University / Shuang-Ho Hospital, 3Department of Pathology, Taipei Medical University, 4Department of Urology, School of Medicine, College of Medicine, Taipei Medical University, 5McLean Imaging Center, McLean Hospital/Harvard Medical School, 6Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, 7Department of Medicine, Mackay Medical College, 8Department of Biological Science and Technology, National Chiao Tung University, 9Graduate Institute of Clinical Medicine, Taipei Medical University

Abstract

A molecular imaging probe comprising superparamagnetic iron oxide (SPIO) nanoparticles and Mycobacterium tuberculosis surface antibody (MtbsAb) was synthesized to enhance imaging sensitivity for extrapulmonary tuberculosis (ETB). An SPIO nanoprobe was synthesized and conjugated with MtbsAb. The purified SPIO-MtbsAb nanoprobe was characterized using TEM and NMR. To determine the targeting ability of the probe, SPIO-MtbsAb nanoprobes were incubated with Mtb for in vitro imaging assays and injected into Mtb-inoculated mice for in vivo investigation with magnetic resonance (MR). The contrast enhancement reduction on magnetic resonance imaging (MRI) of Mtb and THP1 cells showed proportional to the SPIO-MtbsAb nanoprobe concentration. After 30 min of intravenous SPIO-MtbsAb nanoprobe injection into Mtb-infected mice, the signal intensity of the granulomatous site was enhanced by 14-fold in the T2-weighted MR images compared with that in mice receiving PBS injection. The MtbsAb nanoprobes can be used as a novel modality for ETB detection.

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Keywords Superparamagnetic Iron Oxide Nanoprobes

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