Nidogen-1 regulates laminin-1-dependent mammary-specific gene expression

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Nidogen-1 (entactin) acts as a bridge between the extracellular matrix molecules laminin-1 and type IV collagen, and thus participates in the assembly of basement membranes. To investigate the role of nidogen-1 in regulating cell-type-specific gene expression in mammary epithelium, we designed a culture microecosystem in which each component, including epithelial cells, mesenchymal cells, lactogenic hormones and extracellular matrix, could be controlled. We found that primary and established mesenchymal and myoepithelial cells synthesized and secreted nidogen-1, whereas expression was absent in primary and established epithelial cells. In an epithelial cell line containing mesenchymal cells, nidogen-1 was produced by the mesenchymal cells ... continued below

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Pujuguet, Philippe; Simian, Marina; Liaw, Jane; Timpl, Rupert; Werb, Zena & Bissell, Mina J. February 2000.

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Nidogen-1 (entactin) acts as a bridge between the extracellular matrix molecules laminin-1 and type IV collagen, and thus participates in the assembly of basement membranes. To investigate the role of nidogen-1 in regulating cell-type-specific gene expression in mammary epithelium, we designed a culture microecosystem in which each component, including epithelial cells, mesenchymal cells, lactogenic hormones and extracellular matrix, could be controlled. We found that primary and established mesenchymal and myoepithelial cells synthesized and secreted nidogen-1, whereas expression was absent in primary and established epithelial cells. In an epithelial cell line containing mesenchymal cells, nidogen-1 was produced by the mesenchymal cells but deposited between the epithelial cells. In this mixed culture, mammary epithelial cells express b-casein in the presence of lactogenic hormones. Addition of either laminin-1 plus nidogen-1, or laminin-1 alone to mammary epithelial cells induced b- casein production. We asked whether recombinant nidogen-1 alone could signal directly for b-casein. Nidogen-1 did not induce b-casein synthesis in epithelial cells, but it augmented the inductive capacity of laminin-1. These data suggest that nidogen-1 can cooperate with laminin-1 to regulate b-casein expression. Addition of full length nidogen-1 to the mixed cultures had no effect on b-casein gene expression; however, a nidogen-1 fragment containing the laminin-1 binding domain, but lacking the type IV collagen-binding domain, had a dominant negative effect on b-casein expression. These data point to a physiological role for nidogen-1 in the basement membrane-induced gene expression by epithelial cells.

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  • Journal Name: Journal of Cell Science; Journal Volume: 113; Journal Issue: 5

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  • Report No.: LBNL--44571
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 771755
  • Archival Resource Key: ark:/67531/metadc716905

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • Oct. 4, 2017, 1:26 p.m.

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Pujuguet, Philippe; Simian, Marina; Liaw, Jane; Timpl, Rupert; Werb, Zena & Bissell, Mina J. Nidogen-1 regulates laminin-1-dependent mammary-specific gene expression, article, February 2000; California. (digital.library.unt.edu/ark:/67531/metadc716905/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.