Linked Life Data

10567439

Source:http://linkedlifedata.com/resource/pubmed/id/10567439

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1999-12-29
pubmed:abstractText
The Menkes copper ATPase (MNK) is a copper efflux ATPase that is involved in copper homeostasis. Little is known about the intracellular localization and cell-specific function of the MNK in human tissues. To investigate a possible role for this protein in lactation, we measured its expression in sections of tissue from nonlactating and lactating human breast. Western blot analysis showed that MNK expression was greater in lactating tissue than in nonlactating tissue. By confocal immunofluorescence, the MNK was detected in luminal epithelial cells of the alveoli and ducts but not in myoepithelial cells. In the nonlactating breast epithelial cells, the MNK had a predominantly perinuclear distribution. In lactating breast tissue, the distribution of the MNK was markedly altered. Lactating epithelial cells showed a granular, diffuse pattern, which extended beyond the perinuclear region of the cell. This pattern was similar to that observed in a previous study in which cultured CHO cells were exposed to high copper concentrations. Our results suggest that relocalization of the MNK is a physiological process, which may be mediated by copper levels in the breast or by hormones and other events taking place during lactation. A vesicular pathway for copper from the Golgi into milk, similar to that of calcium, is proposed.(J Histochem Cytochem 47:1553-1561, 1999)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0022-1554
pubmed:author
pubmed:issnType
Print
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1553-62
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Expression of menkes copper-transporting ATPase, MNK, in the lactating human breast: possible role in copper transport into milk.
pubmed:affiliation
Deakin University, Centre for Cellular and Molecular Biology, School of Biological and Chemical Sciences, Burwood, Victoria, Australia.
pubmed:publicationType
Journal Article