Ultrastructural observations of typical gap junctions in human foetal lens nucleus
作者:
ItoiMotozumi,
KodamaRyuji,
TakayamaShozo,
ItoiMotokazu,
EguchiGoro,
期刊:
Current Eye Research
(Taylor Available online 1991)
卷期:
Volume 10,
issue 1
页码: 1-9
ISSN:0271-3683
年代: 1991
DOI:10.3109/02713689109007605
出版商: Taylor&Francis
数据来源: Taylor
摘要:
The ultrastructure of gap junctions throughout the human foetal lens was observed. By freezefracture analysis, we observed numerous gap junctions in both lens cortex and lens nucleus. Comparison between lens cortex and lens nucleus showed that the gap junctions of lens nucleus are characterized by extreme mosaics of closely apposed P-and E-faces in junctional areas, though no significant difference in the area of gap junctions was observed between lens cortex and lens nucleus. In addition, some morphological variations, such as the smooth domains without particles or pits in junctional areas and the reticulated figures of gap junctions, were observed only in the lens nucleus. We also observed by thin-section electron microscopy that cell membranes of human foetal lens nucleus, as observed in the lens cortex, are mainly composed of continuous lipid bilayer and junctional structures. We concluded that characteristic morphology of lens gap junctions, as observed in the cortex of human foetal lens, is mostly preserved in the human foetal lens nucleus, although some depth-dependent alterations were also observed.
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