3D reconstruction of the glycocalyx structure in mammalian capillaries using electron tomography.

3D reconstruction of the glycocalyx structure in mammalian capillaries using electron tomography.
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DOI:
10.1111/j.1549-8719.2012.00168.x
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发表时间:
2012-05
期刊:
Microcirculation (New York, N.Y. : 1994)
影响因子:
--
通讯作者:
Squire JM
Squire JM
中科院分区:
其他
文献类型:
--
作者:
Arkill KP;Neal CR;Mantell JM;Michel CC;Qvortrup K;Rostgaard J;Bates DO;Knupp C;Squire JM

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Visualising the molecular strands making up the glycocalyx in the lumen of small blood vessels has proved to be difficult using conventional transmission electron microscopy techniques. Images obtained from tissue stained in a variety of ways have revealed a regularity in the organisation of the proteoglycan components of the glycocalyx layer (fundamental spacing about 20 nm), but require a large sample number. Attempts to visualise the glycocalyx face-on (i.e. in a direction perpendicular to the endothelial cell layer in the lumen and directly applicable for permeability modelling) has had limited success (e.g. freeze fracture). A new approach is therefore needed. Here we demonstrate the effectiveness of using the relatively novel electron microscopy technique of 3D electron tomography on two differently stained preparations to reveal details of the architecture of the glycocalyx just above the endothelial cell layer. One preparation uses the novel staining technique using Lanthanum Dysprosium Glycosamino Glycan adhesion (the LaDy GAGa method).
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