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Zinc transporters 1, 2 and 4 are differentially expressed and localized in rats during pregnancy and lactation.
- Source :
-
The Journal of nutrition [J Nutr] 2003 Feb; Vol. 133 (2), pp. 342-51. - Publication Year :
- 2003
-
Abstract
- Zinc metabolism is controlled within relatively restricted limits throughout the life cycle. Expression and localization of zinc transporters 1, 2 and 4 during pregnancy and lactation in small intestine, mammary gland and liver of the rat were investigated using Northern analysis, Western blotting and immunohistochemistry. In maternal tissues, zinc transporter 4 was the most widely expressed among these zinc transporters in the tissues examined. In small intestine and liver, zinc transporter 4 increased from levels found during late gestation, but zinc transporter 1 did not. Zinc transporter 2 expression in small intestine was transient, being highest around parturition, and was not detected in liver. Immunohistochemistry revealed unique patterns of zinc transporter localization at different stages of development. In the placenta, zinc transporters 1 and 4 were found concentrated along the villous visceral splanchnopleure. In the mammary gland, zinc transporter 4 was most abundant in cells surrounding the alveolar ducts and oriented to the basement lamina. All three transporters were highly expressed in neonatal small intestine, principally near the apical surface, but zinc transporters 1 and 4 increased in abundance at the basolateral surface during development. Zinc transporter 2 was oriented apically, directly adjacent to the microvilli of enterocytes. Within the intestine, expression of each transporter was limited to enterocytes. These results support a role for these transporters in maintaining an adequate zinc supply derived from the maternal diet for zinc acquisition and use by the fetus and neonate.
- Subjects :
- Analysis of Variance
Animals
Blotting, Northern
Blotting, Western
Breast ultrastructure
Carrier Proteins genetics
Embryonic and Fetal Development
Female
Intestine, Small ultrastructure
Liver ultrastructure
Placenta ultrastructure
Pregnancy
Rats
Breast metabolism
Carrier Proteins physiology
Intestine, Small metabolism
Lactation metabolism
Liver metabolism
Placenta metabolism
Zinc metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 0022-3166
- Volume :
- 133
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- The Journal of nutrition
- Publication Type :
- Academic Journal
- Accession number :
- 12566465
- Full Text :
- https://doi.org/10.1093/jn/133.2.342