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. 1989 Jan;134(1):115–132.

Neuroblastic Differentiation Potential of the Human Retinoblastoma Cell Lines Y-79 and WERI-Rb1 Maintained in an Organ Culture System

An Immunohistochemical, Electron Microscopic, and Biochemical Study

Mary M Herman, Elias Perentes, Christos D Katsetos, Françoise Darcel, Anthony Frankfurter, V Peter Collins, Larry A Donoso, Lawrence F Eng, Paul J Marangos, Allan F Wiechmann, Estelle E May, Christine B Thomas, Lucien J Rubinstein
PMCID: PMC1879546  PMID: 2643884

Abstract

The differentiation potential of the human retinoblastoma cell lines Y-79 and WERI-Rb 1 was evaluated in vitro for up to 120 days in a matrix system and in rotary suspension for 30 days. Matrix cultures were grown with 10% fetal calf serum (FCS), with and without differentiation-promoting agents. The latter were applied for a total of 5-45 days (usually 30 days) and included 7S nerve growth factor, dibutyryl cyclic AMP, sodium butyrate, retinoic acid, hydrocortisone, and ascorbic acid. Fully defined, serum-free medium and medium containing 5 or 15% FCS were also used for matrix cultures, and medium with 5 or 10% FCS for suspension cultures. By immunoperoxidase (performed on matrix cultures, both untreated and treated for 30 days with differentiation-promoting agents), the cells of both line were positive for neuron-specific enolase (NSE), microtubule-associated protein 2 (MAP2), class III β-tubulin (human hβ4) isotype, and synaptophysin. In addition, the WERI-Rb1 cells expressed 200 kd neurofilament protein (NFP-H) and retinal S-antigen. Both lines were invariably negative for glial fibrillary acidic (GFA) protein, myelin-associated glycoprotein, myelin basic protein, the epitope recognized by the Leu-7 monoclonal antibody, opsin, and hydroxyindole-0-methyltransferase. In the Y-79 line the presence of NSE and the absence of NF proteins-H, M and -L, of GFA protein, and of retinal S-antigen were confirmed biochemically. No differentiated features were found by electron microscopy in either line. Thus, in the matrix system employed, both lines exhibited solely a potential for neuroblastic differentiation, which was more advanced in the WERI-Rb1 line, as reflected by the antigenic expression of NFP-H and of retinal S-antigen.

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Selected References

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