[Ultrastructural study of lens fiber cells by quick-freezing and deep-etching]. 1995

T Onishi, and M Imai, and S Yaguchi, and T Ogino, and Y Fujii, and S Ohno
Department of Ophthalmology, Fujigaoka Hospital, Showa University, Kanagawa-ken, Japan.

The ultrastructure of lens fiber cytoskeleton was studied by quick-freezing and deep-etching. Lenses of 5 Wistar male rats were divided into lens cortex and lens nucleus. Filamentous structures were clearly observed in the cortical fiber cells, which had diameters in 10 approximately 15 nm or about 5 nm. They showed a meshwork structure. On the other hand, the filamentous structures showed a linear, dense, and laminar pattern in the nuclear fiber cells. These ultrastructural changes of cytoskeletons may be related to the elongation and differentiation of lens fiber cells and may be important for maintaining transparency of the lens.

UI MeSH Term Description Entries
D007908 Lens, Crystalline A transparent, biconvex structure of the EYE, enclosed in a capsule and situated behind the IRIS and in front of the vitreous humor (VITREOUS BODY). It is slightly overlapped at its margin by the ciliary processes. Adaptation by the CILIARY BODY is crucial for OCULAR ACCOMMODATION. Eye Lens,Lens, Eye,Crystalline Lens
D008297 Male Males
D003599 Cytoskeleton The network of filaments, tubules, and interconnecting filamentous bridges which give shape, structure, and organization to the cytoplasm. Cytoplasmic Filaments,Cytoskeletal Filaments,Microtrabecular Lattice,Cytoplasmic Filament,Cytoskeletal Filament,Cytoskeletons,Filament, Cytoplasmic,Filament, Cytoskeletal,Filaments, Cytoplasmic,Filaments, Cytoskeletal,Lattice, Microtrabecular,Lattices, Microtrabecular,Microtrabecular Lattices
D005613 Freeze Etching A replica technique in which cells are frozen to a very low temperature and cracked with a knife blade to expose the interior surfaces of the cells or cell membranes. The cracked cell surfaces are then freeze-dried to expose their constituents. The surfaces are now ready for shadowing to be viewed using an electron microscope. This method differs from freeze-fracturing in that no cryoprotectant is used and, thus, allows for the sublimation of water during the freeze-drying process to etch the surfaces. Etching, Freeze
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D017208 Rats, Wistar A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain. Wistar Rat,Rat, Wistar,Wistar Rats
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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