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The influence of selected cytostatics on human trophoblast in vitro
Abstract:
The effect of cytostatics (Methotrexate, Oncovin and Dactinomycin) on early human trophoblast in vitro was studied by the tissue (organ) culture technique according to Trowell and by brief incubation with thymidine 3H. The cytostatics were tested by the method of Tanneberger in clinical and tenfold higher doses. The criteria for cytostatic efficacy were based an activity of DNA, histologic and histochemical changes, and secretion of hormonal chorionic gonadotropin. In vitro cultures of trophoblast were found to be a good model for evaluation of cytostatics, and the tested chemotherapeutics were effective chemotherapeutically. Upon addition to in vitro cultures they changed the structure and function of trophoblastic cells, resulting in depression of DNA resynthesis, histologic changes, changes in enzyme activities assessed histochemically, and impaired HCG secretion. The most pronounced effects were obtained with Dactinomycin or with a combination of Dactinomycin and methotrexate. Methotrexate alone had the weakest effect on DNA resynthesis and structure of the trophoblastic cells. The effect achieved with methotrexate after 120 hours was equal to the effect of Dactinomycin after 48 hours. Comparison of the histologic and hormonal results with DNA activity showed concordance between the intensity of morphologic and hormonal changes and impairment of nucleic acid functions.
Insights
Cytostatics effectively target early human trophoblast cells in vitro, impacting DNA synthesis, cell structure, and hormone secretion. Dactinomycin, alone or combined with methotrexate, showed the most significant effects on trophoblast function.
Area of Science:
- Pharmacology
- Developmental Biology
- Cell Biology
Background:
- Chemotherapeutic agents are crucial in cancer treatment.
- Understanding their effects on placental cells is vital for managing pregnancy in cancer patients.
- Early human trophoblast cells are key to placental development and function.
Purpose of the Study:
- To evaluate the in vitro efficacy of cytostatics (Methotrexate, Oncovin, Dactinomycin) on early human trophoblast.
- To assess the impact of these drugs on trophoblast structure, DNA synthesis, and hormonal secretion.
- To establish in vitro trophoblast cultures as a model for cytostatic drug evaluation.
Main Methods:
- Utilized Trowell's tissue (organ) culture technique for in vitro trophoblast cultivation.
- Employed brief incubation with thymidine 3H to assess DNA activity.
- Applied Tanneberger's method to test cytostatics at clinical and tenfold higher doses.
Main Results:
- Cytostatics demonstrated chemotherapeutic efficacy in vitro, altering trophoblast cell structure and function.
- Observed were depressed DNA resynthesis, histologic changes, altered enzyme activities, and impaired human chorionic gonadotropin (HCG) secretion.
- Dactinomycin, particularly in combination with methotrexate, exhibited the most pronounced effects; methotrexate alone had the weakest impact.
Conclusions:
- In vitro trophoblast cultures serve as a suitable model for evaluating cytostatic drug effects.
- The tested chemotherapeutics effectively impaired trophoblast cell functions, including DNA synthesis and HCG secretion.
- Morphologic and hormonal changes correlated with impaired nucleic acid functions, validating the drug's impact.