Visualizing the “sandwich” structure of osteocytes in their native environment deep in bone in vivo

Visualizing the “sandwich” structure of osteocytes in their native environment deep in bone in vivo
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可视化体内骨深处天然环境中骨细胞的“三明治”结构

DOI:
10.1002/jbio.201800360
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发表时间:
2018-12
影响因子:
2.8
通讯作者:
Ping Qiu
Ping Qiu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Ke Wang;Yu Du;Hongji Liu;Mengyao Gan;Shen Tong;Wenhui Wen;Ziwei Zhuang;Ping Qiu

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骨细胞是骨中最丰富的细胞,一直是骨研究的热点。它们被嵌入高度分散的矿化骨基质中。因此,以亚细胞分辨率可视化骨深部骨细胞对体内骨研究提出了重大挑战。在这里,我们克服了这一挑战,通过完整的小鼠颅骨在体内展示骨细胞的3光子成像。通过宽带透光率表征,我们确定在1700 nm窗口处的激发使头骨的透光率最高。利用无标签三次谐波成像(THG)技术,我们在140 μm小鼠颅骨内和155 μm小鼠颅骨内观察到骨细胞。通过开发间质空间的选择性标记技术,我们可视化了骨细胞在其天然环境中的“三明治”结构。我们的工作为体内骨研究提供了新的成像方法。
Osteocytes are the most abundant cells in bone and always the focus of bone research. They are embedded in the highly scattering mineralized bone matrix. Consequently, visualizing osteocytes deep in bone with subcellular resolution poses a major challenge for in vivo bone research. Here we overcome this challenge by demonstrating 3‐photon imaging of osteocytes through the intact mouse skull in vivo. Through broadband transmittance characterization, we establish that the excitation at the 1700‐nm window enables the highest optical transmittance through the skull. Using label‐free third‐harmonic generation (THG) imaging excited at this window, we visualize osteocytes through the whole 140‐μm mouse skull and 155 μm into the brain in vivo. By developing selective labeling technique for the interstitial space, we visualize the “sandwich” structure of osteocytes in their native environment. Our work provides novel imaging methodology for bone research in vivo.
DOI: 10.1371/journal.pone.0186846
发表时间: 2017
期刊: PloS one
影响因子: 3.7
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