Ultrastructure of the Parathyroid Gland of Fetal and Pregnant Golden Hamsters Subjected to Hypergravity Environment
作者:
S. Shoumura,
S. Emura,
M. Utsumí,
H. Chen,
D. Hayakawa,
T. Yamahira,
K. Terasawa,
A. Tamada,
M. Arakawa,
H. Isono,
期刊:
Cells Tissues Organs
(Karger Available online 1992)
卷期:
Volume 145,
issue 2
页码: 112-118
ISSN:1422-6405
年代: 1992
DOI:10.1159/000147351
出版商: S. Karger AG
关键词: Parathyroid gland;Fetal and pregnant hamsters;Hypergravity;Ultrastructure
数据来源: Karger
摘要:
The ultrastructure of the parathyroid glands of fetal and pregnant golden hamsters exposed to 5-gravity environment was studied. In the centrifuged fetal animals the Golgi complexes associated with some prosecretory granules were significantly increased compared with those of the control fetal animals, and several secretory granules were located in a peripheral position just beneath the plasma membrane. In the centrifuged pregnant animals the Golgi complexes associated with numerous prosecretory granules were significantly increased, cisternae of the granular endoplasmic reticulum appeared to be increased compared with those of the control pregnant animals, many secretory granules were located in the peripheral cytoplasm and several granules were situated close to the plasma membrane. These findings suggest that in the parathyroid glands of the fetal golden hamsters as well as the pregnant animals the synthesis and release of parathyroid hormone may be stimulated in response to a hypergravity environment.
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