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1

Calcium transport by mammary secretory cells: mechanisms underlying transepithelial movement

100%
Shennan D. B.
Cellular and Molecular Biology Letters
|
2008
|
tom 13
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nr 4
514-525
The secretion of calcium into milk by mammary epithelial cells is a fundamentally important process. Despite this, the mechanisms which underlie the movement of calcium across the lactating mammary gland are still poorly understood. There are, however, two models which describe the handling of calcium by mammary epithelial cells. On the one hand, a model which has existed for several decades, suggests that the vast majority of calcium enters milk via the Golgi secretory vesicle route. On the other hand, a new model has recently been proposed which implies that the active transport of calcium across the apical membrane of mammary secretory cells is central to milk calcium secretion. This short review examines the strengths and weaknesses of both models and suggests some experiments which could add to our understanding of mammary calcium transport.
2
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Effect of vitamin D3-enriched diet on intestinal calcium absorption in rats intoxicated with carbaryl and thiram

100%
Witkowska D., Oledzka R., Sedrowicz L., Duliban D., Szelachowska M.
Polish Journal of Food and Nutrition Sciences
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1992
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tom 01
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nr 4
3

Calcium uptake by sarcoplasmic reticulum in the presence of the organophosphorus insecticide methylparathion

100%
Blasiak J.
Polish Journal of Environmental Studies
|
1995
|
tom 04
|
nr 1
Using an isotope labelling technique it has been shown that an organophosphorus insecticide methylparathion (0,0-diethyl 0-4-nitrophenyl phosphorothioate) depressed calcium uptake by sarcoplasmic reticulum isolated from rabbit hind leg muscle. The effect was significant for insecticide concentrations of 50 and 100 µM and was dose-dependent The insecticide exerted a more pronounced effect on calcium uptake in the presence of ATP in the reticulum environment than in the absence of ATP. The inhibitory action of methylparathion on Ca2+ accumulation by sarcoplasmic reticulum can cause a rise in myoplasmic free Ca2+, the essential prerequisite for contracture activation. Because methylparathion, as well as other organophosphorus insecticides, is primarily neurotoxic, evidence of non-specific effect could be important for assessing its environmental safety.
4
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Regulation and molecular mechanisms of calcium transport genes: Do they play a role in calcium transport in the uterine endometrium?

80%
Choi K. C., An B. S., Yang H., Jeung E. B.
Journal of Physiology and Pharmacology
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2011
|
tom 62
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nr 5
5
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Potassium-dependent sodium/calcium exchanger 3 (Nckx3) depletion leads to abnormal motor function and social behavior in mice

80%
Tran D. N., Jung E.-M., Yoo Y.-M., Lee J.-H., Jeung E.-B.
Journal of Physiology and Pharmacology
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2020
|
tom 71
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nr 4
6

The structure of the Ca2plus -ATPase of sarcoplasmic reticulum

80%
Martonosi A. N., Pikula S.
Acta Biochimica Polonica
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2003
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tom 50
|
nr 2
In this article the morphology of sarcoplasmic reticulum, classification of Ca2+ -ATPase (SERCA) isoenzymes presented in this membrane system, as well as their topology will be reviewed. The focus is on the structure and interactions of Ca2+ -ATPase determined by electron and X-ray crystallog2r+aphy, lamellar X-ray and neutron diffraction analysis of the profile structure of Ca2+ -ATPase in sarcoplasmic reticulum multilayers. In addition, targeting of the Ca2+ -ATPase to the sarcoplasmic reticulum is discussed.
7
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Bialka transportujace wapn w roslinie

71%
Winska-Krysiak M.
Acta Agrophysica
|
2006
|
tom 07
|
nr 3[134]
751-762
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