Multimodal optical mesoscopy reveals the quantity and spatial distribution of gram-positive biofilms in ex vivo tonsils

Multimodal optical mesoscopy reveals the quantity and spatial distribution of gram-positive biofilms in ex vivo tonsils
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多模态光学介观镜揭示离体扁桃体革兰氏阳性生物膜的数量和空间分布

DOI:
10.1101/2023.07.03.547470
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发表时间:
2023
期刊:
--
影响因子:
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通讯作者:
Clapperton M
Clapperton M
中科院分区:
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作者:
Clapperton M

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已知生物膜存在于扁桃体中,但对其在整个扁桃体中的空间位置和大小分布知之甚少。迄今为止,对扁桃体标本中生物膜的位置和分布的研究仅限于高放大倍率方法,例如电子显微镜,它可以实现高分辨率成像,但只能从微小的组织体积中进行;或者较低放大倍率技术,例如光学显微镜,它可以对较大的标本进行成像,但空间分辨率较差。为了克服这些限制,我们报告使用多模态光学介观镜来可视化和量化新鲜切除的儿科扁桃体中革兰氏阳性生物膜的数量和空间分布。该方法支持对最大 5 mm × 5 mm × 3 mm 的整个组织中的扁桃体宿主和生物膜进行同时成像,并具有亚细胞分辨率。对 36 个扁桃体标本的定量评估显示,扁桃体表面和扁桃体内部的生物膜存在没有统计学上的显着差异。这种新的定量介观成像方法可能有助于了解生物膜在扁桃体疾病和其他感染中的作用。
Biofilms are known to be present in tonsils, but little is known about their spatial location and size distribution throughout the tonsil. Studies of the location and distribution of biofilms in tonsil specimens have thus far been limited to either high‐magnification methods such as electron microscopy, which enables high‐resolution imaging but only from a tiny tissue volume, or lower magnification techniques such as light microscopy, which allow imaging of larger specimens but with poor spatial resolution. To overcome these limitations, we report the use of multimodal optical mesoscopy to visualise and quantify the number and spatial distribution of Gram‐positive biofilms in fresh, excised paediatric tonsils. This methodology supports simultaneous imaging of both the tonsil host and biofilms in whole mounts of tissue up to 5 mm × 5 mm × 3 mm with subcellular resolution throughout. A quantitative assessment of 36 tonsil specimens revealed no statistically significant difference between biofilm presence on the tonsil surface and the interior of the tonsil. This new quantitative mesoscale imaging approach may prove useful in understanding the role of biofilms in tonsillar diseases and other infections.
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