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MnO nanoparticles with potential application in magnetic resonance imaging and drug delivery for myocardial infarction.

ABSTRACT: Background:Myocardial infarction (MI) is a leading cause of death worldwide. Therefore, nanoparticles that applied for specific diagnosis of the infarcted area and/or local myocardial delivery of therapeutic agents, are highly desired. Materials and methods:Herein, we developed the MnO-based nanoparticles, with magnetic resonance (MR) and near-infrared fluorescence imaging modalities as an MR imaging contrast agent and potential drug vehicle for the detection and treatment of MI. The chemophysical characteristics, targeting ability toward infarcted myocardium, biodistribution, and biocompatibility of the MnO-based nanoparticles were studied. Results:It was found that the MnO-based dual-modal nanoparticles possess high r 1 relaxivity and induced no notable in vitro or in vivo toxicity. In a rat model of MI, these nanoparticles represent a very promising MR imaging contrast agent for sensitive and specific detection of the infarcted area, more importantly, without cardiotoxicity, the major defect of conventional Mn-based contrasts. Moreover, ex vivo near-infrared fluorescence imaging indicated that the MnO nanoparticles preferentially accumulate in the infarcted myocardium, which makes them an ideal drug vehicle for MI treatment. Conclusion:In summary, the use of these MnO nanoparticles as a T1-weighted MR imaging contrast agent and potential drug vehicle to target the infarcted myocardium may provide new opportunities for accurate detection of myocardial infarct and treatment of ischemic heart diseases.

SUBMITTER: Zheng Y

PROVIDER: S-EPMC6181115 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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MnO nanoparticles with potential application in magnetic resonance imaging and drug delivery for myocardial infarction.

Zheng Yuanyuan Y Zhang Hong H Hu Yuping Y Bai Lu L Xue Jingyi J

International journal of nanomedicine 20181008

<h4>Background</h4>Myocardial infarction (MI) is a leading cause of death worldwide. Therefore, nanoparticles that applied for specific diagnosis of the infarcted area and/or local myocardial delivery of therapeutic agents, are highly desired.<h4>Materials and methods</h4>Herein, we developed the MnO-based nanoparticles, with magnetic resonance (MR) and near-infrared fluorescence imaging modalities as an MR imaging contrast agent and potential drug vehicle for the detection and treatment of MI. ...[more]

PMID: 30323598

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Project description:AAR measurement is useful when assessing the efficacy of reperfusion therapy and novel cardioprotective agents after myocardial infarction. Multi-slice (Typically 10-12) T2-STIR has been used widely for its measurement, typically with a short axis stack (SAX) covering the entire left ventricle, which can result in long acquisition times and multiple breath holds. This study sought to compare 3-slice T2-short-tau inversion recovery (T2- STIR) technique against conventional multi-slice T2-STIR technique for the assessment of area at risk (AAR).CMR imaging was performed on 167 patients after successful primary percutaneous coronary intervention. 82 patients underwent a novel 3-slice SAX protocol and 85 patients underwent standard 10-slice SAX protocol. AAR was obtained by manual endocardial and epicardial contour mapping followed by a semi- automated selection of normal myocardium; the volume was expressed as mass (%) by two independent observers.85 patients underwent both 10-slice and 3-slice imaging assessment showing a significant and strong correlation (intraclass correlation coefficient?=?0.92;p?<?0.0001) and a low Bland-Altman limit (mean difference -0.03?±?3.21%, 95% limit of agreement,- 6.3 to 6.3) between the 2 analysis techniques. A further 82 patients underwent 3-slice imaging alone, both the 3-slice and the 10-slice techniques showed statistically significant correlations with angiographic risk scores (3-slice to BARI r?=?0.36, 3-slice to APPROACH r?=?0.42, 10-slice to BARI r?=?0.27, 10-slice to APPROACH r?=?0.46). There was low inter-observer variability demonstrated in the 3-slice technique, which was comparable to the 10-slice method (z?=?1.035, p?=?0.15). Acquisition and analysis times were quicker in the 3-slice compared to the 10-slice method (3-slice median time: 100 seconds (IQR: 65-171 s) vs. (10-slice time: 355 seconds (IQR: 275-603 s); p?<?0.0001.AAR measured using 3-slice T2-STIR technique correlates well with standard 10-slice techniques, with no significant bias demonstrated in assessing the AAR. The 3-slice technique requires less time to perform and analyse and is therefore advantageous for both patients and clinicians.

Dataset Information

MnO nanoparticles with potential application in magnetic resonance imaging and drug delivery for myocardial infarction.

Publications

MnO nanoparticles with potential application in magnetic resonance imaging and drug delivery for myocardial infarction.

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