The Effect of Magnesium on the Fine Structure of the Golden Hamster Parathyroid Gland in Vivo and in Vitro

Utsumi, Michiya; Emura, S.; Isono, Hideo; Shoumura, Shízuko

doi:10.2535/ofaj1936.74.2-3_81

Cited by 1 publication

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“…It is biochemically or ultrastructurally reported that Mg decreases the activity of the PTH (Altenahr and Leonhardt, 1972;Cholst et aL, 1984;Suzuki et aL, 1986;Utsumi et aL, 1997). In the PTG of the 1.2G group the rER had significantly increased cornpared with that of the control group.…”

Section: Discussionmentioning

confidence: 92%

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Effect of Centrifugation on the Ultrastructure of the Parathyroid Gland of the Magnesium-treated Golden Hamster

Utsumi

Emura

Isono

et al. 1997

Okajimas Folia Anatomica Japonica

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Summary: The ultrastructure of the parathyroid glands (PIG) of magnesium (Mg)-treated golden hamsters exposed to centrifugation at 1.2 G for 7 days was compared to that of the control, Mg-treated or centrifuged groups. In the PTG of the Mg-treated group exposed to centrifugation, the Golgi apparatus increased compared with that of the Mg-treated group, but was similar to that of the control and centrifuged groups. The cisternae of the rough endoplasmic reticulum (rER) increased compared with that of the Mg-treated group and decreased compared with that of the centrifuged group, but was the same as that of the control group. There were no significant differences among the 4 groups with regard to lysosomes, large vacuolar bodies, lipid droplets and secretory granules. These observations suggest that the rER is sensitive to centrifugation compared with the Golgi apparatus and more importantly the inhibitive effect of Mg on the synthesis of the hamster parathyroid hormone is enfeebled by centrifugation at 1.2 G.In a series of recent morphological studies on the parathyroid glands (PTG) in this laboratory using centrifugation, animals were exposed to simulated increase in body weight by centrifugation at 5.0 G for 1 or 5 hr and these studies have showed acute effects of the high rotation of centrifugation on the PTG (Shoumura et

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Section: Discussionmentioning

confidence: 92%

“…On the other hand, it is well known in the biochemical or morphological study that magnesium (Mg) plays an important role in the regulation of parathyroid hormone secretion as well as calcium (Altenahr and Leonhardt, 1972;Cho1st et al , 1984;Suzuki et aL, 1986;Utsumi et aL, 1997).…”

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confidence: 99%