Freeze-fracture study of the junctional complexes of human and rabbit thyroid follicles |
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| Authors: | Dr J Thiele E Reale |
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| Institution: | (1) Institute of Pathology and Department of Anatomy, Laboratory of Electron Microscopy, Hannover Medical School, Hannover, Germany;(2) Pathologisches Institut, Medizinische Hochschule, Karl Wiechert-Allee 9, 61 Hannover, Federal Republic of Germany |
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| Abstract: | Summary Zonulae occludentes, gap junctions and desmosomes have been demonstrated in replicas of freeze-fractured follicular cells of normal human and rabbit thyroid glands. The zonulae occludentes between the human follicular cells are composed of two to eight strands, which completely separate the intercellular space from the follicular lumen. Four to twelve or more strands are visible between the follicular cells of the rabbit thyroid gland.In the meshes of the zonulae occludentes as well as below them, gap junctions are present. They are numerous on the fracture faces of the human follicular cell membranes, but infrequent in those of the rabbit.Aggregates of particles related to desmosomes are found in the deeper meshes of the zonulae occludentes or close to them. |
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| Keywords: | Thyroid gland Follicle cell Junctional complex Freeze fracturing Electron microscopy |
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