In vivo noninvasive detection of Brown Adipose Tissue through intermolecular zero-quantum MRI.

In vivo noninvasive detection of Brown Adipose Tissue through intermolecular zero-quantum MRI.
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DOI:
10.1371/journal.pone.0074206
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Maronpot R
Maronpot R
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Branca RT;Zhang L;Warren WS;Auerbach E;Khanna A;Degan S;Ugurbil K;Maronpot R

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最近在成人中发现的活跃的棕色脂肪组织(BAT)为肥胖症的研究和治疗开辟了新的途径,因为BAT活动减少似乎与人类能量失衡、糖尿病和高血压有关。然而,目前由于缺乏非侵入性工具来测量人体这一组织的质量和功能,临床应用受到了限制。在这里,我们提出了一种新的磁共振成像方法,该方法基于通常不可见的分子间多量子相干1H磁共振信号。这种方法不需要特殊的硬件修改,可以用来克服部分体积效应,这是目前正在研究的基于MR的方法在人类中检测BAT的主要限制。通过这种方法,我们可以利用蝙蝠特有的细胞结构来选择性地对其进行成像,即使它与其他组织密切混合(如在人类中)。我们使用PET扫描和组织学在小鼠身上演示并验证了这种方法。我们将该方法与常规的1H磁共振脂肪分数方法进行了比较。最后,我们研究了该方法用于人体BAT检测的可行性。
The recent discovery of active Brown Adipose Tissue (BAT) in adult humans has opened new avenues for obesity research and treatment, as reduced BAT activity seem to be implicated in human energy imbalance, diabetes, and hypertension. However, clinical applications are currently limited by the lack of non-invasive tools for measuring mass and function of this tissue in humans. Here we present a new magnetic resonance imaging method based on the normally invisible intermolecular multiple-quantum coherence 1H MR signal. This method, which doesn’t require special hardware modifications, can be used to overcome partial volume effect, the major limitation of MR-based approaches that are currently being investigated for the detection of BAT in humans. With this method we can exploit the characteristic cellular structure of BAT to selectively image it, even when (as in humans) it is intimately mixed with other tissues. We demonstrate and validate this method in mice using PET scans and histology. We compare this methodology with conventional 1H MR fat fraction methods. Finally, we investigate its feasibility for the detection of BAT in humans.
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