Abstract:
:A mouse mammary epithelial cell line with morphogenetic properties in vivo, Comma-Dbeta, was used to isolate and to characterize mammary progenitor cells. We found that a homogeneous cell population expressing high surface levels of stem cell antigen 1 (Sca-1) was able to give rise in vivo to ductal and alveolar structures comprising luminal secretory and basal myoepithelial cells. Unlike the Sca-1(high), the Sca-1(neg/low) cell population displayed a reduced morphogenetic potential. The Sca-1(high) cells presented moderate CD24, high CD44 and alpha6 integrin surface levels, expressed basal cell markers p63, keratins 5 and 14, but no luminal and myoepithelial lineage markers. In culture, the Sca-1(high) cells generated identical daughter cells that retained their in vivo developmental potential, indicating that these cells were maintained by self-renewal. Plated at clonogenic density in Matrigel, Sca-1(high) cells formed spheroids that included luminal and myoepithelial cells. Thus, the isolated Sca-1(high) basal cells possess several features of stem/progenitor cells, including specific markers, self-renewal capacity, and the ability to generate the two major mammary lineages, luminal and myoepithelial. These data provide evidence for the existence of basal-type mouse mammary progenitors able to participate in the morphogenetic processes characteristic of mammary gland development.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Deugnier MA,Faraldo MM,Teulière J,Thiery JP,Medina D,Glukhova MAdoi
10.1016/j.ydbio.2006.02.007subject
Has Abstractpub_date
2006-05-15 00:00:00pages
414-25issue
2eissn
0012-1606issn
1095-564Xpii
S0012-1606(06)00107-2journal_volume
293pub_type
杂志文章abstract::A number of genes encoding developmentally regulated mRNAs in the cellular slime mold, Dictyostelium discoideum, have been described. Many of these are regulated by cAMP. Analysis of the earliest time at which elevated levels of cAMP can induce the expression of these mRNAs reveals a more complex pattern of regulation...
journal_title:Developmental biology
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