| Freeze-fracture observations of the lactating rat mammary gland. Membrane events during milk fat secretion. | |
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MedLine Citation:
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PMID: 632326 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Membrane events during milk fat secretion were analyzed by freeze-fracture of the rat mammary gland. Two modes of milk fat secretion were observed: extrusion of fat droplets surrounded by a portion of the apical plasma membrane of the alveolar epithelial cells and, less frequently, release into the alveolar lumen of fat droplets contained in intracytoplasmic vacuoles. The extrusion process consists of two asynchronous events: clearing of membrane particles (probably including integral membrane proteins) and bulging of the apical plasma membrane. Most fat droplets are extruded with a bilayer membrane envelope (milk fat globule membrane) partially devoid of particles. The segregation of membrane particles may represent the onset of a process of structural degradation of the milk fat globule membrane. |
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Authors:
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A Peixoto de Menezes; P Pinto da Silva |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of cell biology Volume: 76 ISSN: 0021-9525 ISO Abbreviation: J. Cell Biol. Publication Date: 1978 Mar |
Date Detail:
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Created Date: 1978-05-17 Completed Date: 1978-05-17 Revised Date: 2010-09-02 |
Medline Journal Info:
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Nlm Unique ID: 0375356 Medline TA: J Cell Biol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 767-78 Citation Subset: IM |
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cell Membrane / ultrastructure Female Freeze Fracturing Lactation* Lipids Mammary Glands, Animal / physiology, ultrastructure* Milk Pregnancy Rats |
| Chemical | |
Reg. No./Substance:
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0/Lipids |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
| Full Text | |
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Journal Information Journal ID (nlm-ta): J Cell Biol ISSN: 0021-9525 ISSN: 1540-8140 Publisher: The Rockefeller University Press |
Article Information Download PDF  Print publication date: Day: 1 Month: 3 Year: 1978 Volume: 76 Issue: 3 First Page: 767 Last Page: 778 ID: 2110004 Publisher Id: 78130219 PubMed Id: 632326 |
| Freeze-fracture observations of the lactating rat mammary gland. Membrane events during milk fat secretion | |
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