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Anticellular activities of human fibroblast interferon beta and human recombinant interferon gamma. Cytologic changes
T Iwasaka1, T Yoshimura, Y Ohkuma
1Department of Obstetrics and Gynecology, Saga Medical School, Japan.
Abstract:
The cellular changes in a human cervical squamous-cell-cancer cell line (SKG-IIIb) were investigated after treatment with human recombinant interferon gamma and human fibroblast interferon beta. Cytoplasmic changes characterized by elongation, vacuolization and blurring of cytoplasmic borders appeared relatively early in both treatment groups. After two days of treatment with interferon gamma, the cells began to aggregate and to form pearl-like structures in the center of these aggregates; frequently seen were isolated cells with an eosinophilic cytoplasm and a pyknotic nucleus, similar to keratinizing cells. After six days of treatment with interferon beta, on the other hand, more than 20% of the cells began to show nuclear changes, including remarkable pleomorphism, multilobulation and multinucleation. The differences in biologic activities between the two interferons are discussed on the basis of these observations.