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- W4246571827 abstract "Objective: Determine the effects of factors secreted by normal human ovarian stroma on the proliferation of benign and malignant ovarian epithelia, in vitro. Methods: Primary cultures of normal human ovarian surface epithelium (HOSE), human ovarian stromal tissue (HOST), and epithelial ovarian carcinomas (CSOC) were established from surgical specimens and characterized immunohistochemically using anti-cytokeratin, vimentin, and Factor VIII antibodies. Stroma-conditioned media (SCM) were collected over 3 days from confluent HOST cultures. The SCM were dialyzed, lyophilized, resuspended, and added to HOSE, CSOC, SKOV-3, and Caov-3 ovarian cancer cell cultures and growth inhibitory effects were assayed by MTS and [3H]thymidine uptake. Results: SCM inhibited the growth and DNA synthesis of normal HOSE cells and cancer cells by 79-99% in >10-cell lines studied to date. The inhibitory effect was rapid in onset with 31-82% reduction in DNA synthesis at 1 hr and approximately 50% return of activity by 23 hr following a 1-hr SCM pulse treatment. The SCM inhibitory activity was not abolished by boiling or by absorption with heparin-agarose. Size exclusion filtration places the molecular weight of the inhibitory substance between 1 and 3 kDa. Neither trypsin nor proteinase K treatments altered the inhibitory activity of SCM, while a Bligh-Dyer organic extraction placed the activity in the aqueous phase. Conclusion: A heat-stable, nonheparin-binding, low-molecular-weight, water-soluble substance secreted by normal ovarian stroma significantly inhibits HOSE and ovarian cancer cell proliferation. Derangements in normal ovarian stroma-epithelial interactions may contribute to growth dysregulation of the surface epithelia and result in ovarian carcinogenesis." @default.
- W4246571827 created "2022-05-12" @default.
- W4246571827 date "1985-10-01" @default.
- W4246571827 modified "2023-10-18" @default.
- W4246571827 title "Should outpatient burns be treated with antibiotics?" @default.
- W4246571827 doi "https://doi.org/10.1016/0305-4179(85)90194-9" @default.
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