Abstract:
:The human embryonal carcinoma (EC) cell line Tera 2 clone 13 (T2/13) can be induced to differentiate in vitro into neuroectodermal cell types with retinoic acid. Undifferentiated cells are characterized by rapid proliferation, whereas differentiated cells show a prolonged generation time, have a limited life span, and possess new cell-surface markers. In the present study we establish that both differentiated and undifferentiated T2/13 cells express the type-B platelet-derived growth factor (PDGF) receptor mRNA and bind PDGF-BB with high affinity. Differentiation causes a three-fold increase in receptor number per cell and leaves the affinity of the receptors unaffected. These data are the first to describe expression of this receptor in EC cells. The biosynthesis and degradation of this receptor were studied in undifferentiated as well as in differentiated T2/13 cells using an anti-type-B receptor antibody. These experiments revealed that high concentrations of recombinant PDGF-AA did not accelerate receptor metabolism in both cell types. In contrast, human PDGF or recombinant PDGF-BB added to the culture dishes readily increased receptor degradation. These results demonstrate that T2/13 cells express functional type-B PDGF receptors and suggest that cells responsive to PDGF might be present during mammalian development before the onset of mesoderm formation.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Weima SM,van Rooijen MA,Mummery CL,Feyen A,de Laat SW,van Zoelen EJdoi
10.1016/0014-4827(90)90312-xsubject
Has Abstractpub_date
1990-02-01 00:00:00pages
324-31issue
2eissn
0014-4827issn
1090-2422journal_volume
186pub_type
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