A Krystosek

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The secretion of the protease plasminogen activator (PA) by cells of developing peripheral nerve was demonstrated. Fetal and early postnatal dorsal root ganglia were established in culture as explants or as individual neurons and Schwann cells. A fibrin overlay assay was used to visualize the locations of PA secretion. Fibrinolytic zones formed around the(More)
Dispersed cell cultures were established from 7- to 9-day postnatal mouse cerebellum. The fibrin slice method was used to obtain a localization of plasminogen activator production to specific cells. Fibrinolytically active cells were small (5- to 8-micrometer diameter), round, and occurred singly or in aggregates. Fibrinolysis was both plasminogen and time(More)
The molecular characterization of neural secretory plasminogen activators and their possible association with two well-defined Schwann cell activities (mitosis and migration) were investigated. Schwann cells from peripheral sensory ganglion roots were established as primary cultures of high purity. Conditioned culture medium was fractionated by gel(More)
A system has been developed with clones of mouse myeloid leukemic cells in culture to study the induction of synthesis and secretion of lysozyme in relation to other steps in myeloid cell differentiation. Lysozyme was initially absent in all the clones studied. The different clones can be divided into three types according to their ability to be induced to(More)
The results of four different assay methods showed that both normal and malignant plasminogen activator-secreting cells deposited substantial amounts of this protease on tissue-culture substrata, including collagen coatings. The cells studied were Rous sarcoma virus (RSV)-transformed vole fibroblasts, a malignant neural cell line (NG108-15) capable of(More)
Neurite formation and proliferation by NG108-15 cells were studied in short-term serum-free N2 medium. Neuritogenesis by individual cells was observed at widely differing times, suggesting a stochastic component to initiation of differentiation. Cells with and without neurites could also enter one or more rounds of proliferation at varying times. The(More)