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Published on: August 23, 2016
Effects of human interferons on human choriocarcinoma cells in vitro and in vivo
Abstract:
Three kinds of human choriocarcinoma cell lines (BeWo, HCCM-5, and NUC-1) were used for examining the antiviral and antiproliferative activities of human interferons (IFNs) in vitro and in vivo. All of the cell lines showed only low sensitivity to the antiviral action of every IFN-alpha, IFN-beta, and IFN-gamma against vesicular stomatitis virus infection. However, 2-5A synthetase was normally induced by IFN-alpha in all of the cell lines. The [3H]thymidine incorporation of both BeWo and HCCM-5 cells was suppressed in dose-dependent manner at 48 hr after treatment with 1 to 1,000 units (U)/ml of IFN-alpha or IFN-beta and the growth of them was also slightly inhibited when treated continuously with 1,000 U/ml for 6 days in vitro. Another cell line NUC-1 was the least sensitive to these IFNs among the three cell lines. IFN-gamma did not show any antiproliferative effect on these cell lines. The intraperitoneal administration of 5000 or 10,000 U of IFN-beta suppressed the growth of xenografts developed in hamster cheek pouches and subcutis of nude mice when its administration was initiated on the first day of cell inoculation. These results indicate that although some heterogeneities exist among the cell lines choriocarcinoma cells are weakly sensitive to the antiproliferative activity of human IFNs.
Insights
Human interferons (IFNs) showed limited antiviral and antiproliferative effects on choriocarcinoma cell lines in vitro. However, IFN-beta demonstrated efficacy in suppressing tumor growth in vivo, suggesting potential therapeutic applications.
Area of Science:
- Immunology
- Cell Biology
- Virology
Background:
- Human interferons (IFNs) are crucial for antiviral defense.
- Choriocarcinoma cell lines are utilized to study cancer biology and potential therapies.
Purpose of the Study:
- To investigate the antiviral and antiproliferative activities of human interferons (IFNs) against choriocarcinoma cell lines.
- To evaluate the in vitro and in vivo efficacy of IFNs in choriocarcinoma models.
Main Methods:
- Utilized three human choriocarcinoma cell lines (BeWo, HCCM-5, NUC-1).
- Assessed antiviral activity against vesicular stomatitis virus.
- Measured [3H]thymidine incorporation and cell growth inhibition.
- Administered IFN-beta intraperitoneally in xenograft models (hamster cheek pouches, nude mice).
Main Results:
- Choriocarcinoma cell lines exhibited low sensitivity to the antiviral effects of IFN-alpha, IFN-beta, and IFN-gamma.
- IFN-alpha effectively induced 2-5A synthetase in all cell lines.
- IFN-alpha and IFN-beta showed dose-dependent suppression of [3H]thymidine incorporation and slight growth inhibition in BeWo and HCCM-5 cells.
- IFN-beta suppressed xenograft growth in vivo when administered early.
- IFN-gamma lacked antiproliferative effects on these cell lines.
Conclusions:
- Choriocarcinoma cells display weak sensitivity to the antiproliferative activity of human IFNs in vitro.
- Despite in vitro limitations, IFN-beta shows potential for in vivo tumor growth suppression in choriocarcinoma models.
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