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Synthesis and characterization of novel 99mTc-DGC nano-complexes for improvement of heart diagnostic.
Bioorganic Chemistry ( IF 4.5 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.bioorg.2020.103572
Mehdi Shafiee Ardestani 1 , Ahmad Bitarafan-Rajabi 2 , Pardis Mohammadzadeh 3 , Sobhan Mortazavi-Derazkola 4 , Omid Sabzevari 5 , Amir Darbandi Azar 6 , Sohrab Kazemi 7 , Seyedeh Rozhin Hosseini 1 , Seyedeh Masoumeh Ghoreishi 8
Affiliation  

In this research, early diagnosis of cardiovascular diseases can reduce their mortality and burden. In our study, we developed a new nano-agent, 99mTc-Dendrimer Glyco Conjugate (99mTc-DGC), and assessed its safety and capability for myocardial viability scan. To develop 99mTc-DGC, we first synthesized the dendrimer and then, glucose has been conjugated. Afterwards, we measured toxicity of the product on normal cells by XTT and apoptosis/necrosis methods. We compared the myocardial viability scan (measured by SPECT and dynamic planar imaging) in two rabbit models, with and without infarction. We also assessed the biodistribution of 99mTc-DGC in rats with no infarction. DGC synthesis was confirmed by Fourier transform infrared (FT-IR), proton nuclear magnetic resonance (1H NMR), liquid chromatography-mass spectrometry (LC-MS), dynamic light scattering (DLS) and static light scattering techniques (SLS). Then radiochemical purity (RCP) was done to present the stability and potential of DGC to complex formation with 99mTc. In vitro cytotoxicity showed nontoxic concentration up to 8 mg/mL. Single Photon Emission Computed Tomography (SPECT) and dynamic planar imaging clearly showed the accumulation of 99mTc-DGC in myocardial. Biodistribution result showed the 2.60% accumulation of 99mTc-DGC in myocardial after 2 h. Our findings indicated 99mTc-DGC to be safe and can accurately diagnose myocardial infarctions at early stages. Human studies to further assess such effects are critical.

中文翻译:

新型99mTc-DGC纳米复合物的合成和表征,可改善心脏诊断。

在这项研究中,早期诊断心血管疾病可以降低其死亡率和负担。在我们的研究中,我们开发了一种新型纳米剂99mTc-Dendrimer糖共轭物(99mTc-DGC),并评估了其在心肌活力扫描中的安全性和能力。为了开发99mTc-DGC,我们首先合成了树枝状大分子,然后将葡萄糖偶联。之后,我们通过XTT和凋亡/坏死方法测量了该产品对正常细胞的毒性。我们在有和没有梗塞的两个兔子模型中比较了心肌生存力扫描(通过SPECT和动态平面成像测量)。我们还评估了99mTc-DGC在无梗死大鼠中的生物分布。DGC的合成通过傅里叶变换红外(FT-IR),质子核磁共振(1H NMR),液相色谱-质谱(LC-MS)进行了确认,动态光散射(DLS)和静态光散射技术(SLS)。然后进行放射化学纯度(RCP),以显示DGC与99mTc形成复合物的稳定性和潜力。体外细胞毒性显示无毒浓度高达8 mg / mL。单光子发射计算机断层扫描(SPECT)和动态平面成像清楚地表明了99mTc-DGC在心肌中的蓄积。生物分布结果显示2h后,心肌中99mTc-DGC的积累为2.60%。我们的发现表明99mTc-DGC是安全的,可以在早期准确诊断出心肌梗塞。进一步评估此类影响的人体研究至关重要。体外细胞毒性显示无毒浓度高达8 mg / mL。单光子发射计算机断层扫描(SPECT)和动态平面成像清楚地表明了99mTc-DGC在心肌中的蓄积。生物分布结果表明2h后心肌中99mTc-DGC的积累为2.60%。我们的发现表明99mTc-DGC是安全的,可以在早期准确诊断出心肌梗塞。进一步评估此类影响的人体研究至关重要。体外细胞毒性显示无毒浓度高达8 mg / mL。单光子发射计算机断层扫描(SPECT)和动态平面成像清楚地表明了99mTc-DGC在心肌中的蓄积。生物分布结果显示2h后,心肌中99mTc-DGC的积累为2.60%。我们的发现表明99mTc-DGC是安全的,可以在早期准确诊断出心肌梗塞。进一步评估此类影响的人体研究至关重要。
更新日期:2020-01-09
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