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Updated: May 25, 2026

Modeling Chemotherapy Resistant Leukemia In Vitro
Published on: February 9, 2016
[Five year-results of chemoresistance testing in cancer patients]
J Hatok1, T Matáková, J Jureceková
1Ustav lekárskej biochémie, JLF UK Martin, Slovenská republika. hatok@jfmed.uniba.sk
Backgrounds:
Translational medicine is a medical field encompassing basic research and development of new diagnostic and therapeutic strategies for clinical practice. The present scientific paper focuses on our previous experience in the field of chemoresistance testing in patients with oncological diseases.
Material And Methods:
Since 2005, we sampled 71 patients with a leukaemia (AML, ALL and CML) and 92 patients with a solid tumour (lung and gastrointestinal tract cancer). Malignant cell in vitro drug resistance testing was carried out using cytotoxic methyl-thiazol tetrazolium (MTT) assay.
Results:
Based on the LC50 (lethal concentration of a drug killing 50% of cell population), we found that patients with acute myeloblastic leukaemia exhibit a greater degree of resistance than patients with acute lymphoblastic leukaemia. In patients with bronchogenic carcinomas, primary resistance to cisplatin was identified in 28% of tested samples, paclitaxel 36%, vincristine 50%, etoposide 56%, vinorelbine 57%, topotecan 62%, gemcitabine 77% and dacarbazine 86%.
Conclusion:
In vitro tests with gastrointestinal tract cancers also suggested high effectiveness of cisplatin (with the exception of gastric carcinoma) that was comparable with 5-fluorouracil. Even though the MTT assay has some limitations (insufficient number of vital cells, possible contamination by non-malignant cells, etc.), this in vitro method proved very effective in testing malignant cell resistance to clinically used cytostatics.
Insights
Chemoresistance testing in cancer patients using the MTT assay revealed significant drug resistance in acute myeloblastic leukemia and solid tumors. This in vitro method effectively identified varying patient responses to chemotherapy agents.
Area of Science:
- Oncology
- Translational Medicine
- Pharmacology
Context:
- Translational medicine bridges basic research and clinical practice for novel diagnostics and therapeutics.
- Chemoresistance testing is crucial for optimizing cancer treatment strategies.
- Previous experience in chemoresistance testing for oncological diseases is presented.
Purpose:
- To evaluate in vitro chemoresistance in patients with leukemia and solid tumors.
- To assess the efficacy of various chemotherapy agents against malignant cells.
- To determine the utility of the MTT assay in predicting drug resistance.
Summary:
- The study analyzed 71 leukemia patients (AML, ALL, CML) and 92 solid tumor patients (lung, gastrointestinal).
- In vitro drug resistance was tested using the methyl-thiazol tetrazolium (MTT) assay.
- Results indicated higher resistance in acute myeloblastic leukemia than acute lymphoblastic leukemia, and identified primary resistance rates for multiple agents in lung and gastrointestinal cancers.
Impact:
- The MTT assay demonstrated effectiveness in identifying malignant cell resistance to cytostatics, despite limitations.
- Findings provide insights into patient-specific chemoresistance, aiding in personalized treatment approaches.
- Identified resistance patterns can inform the selection of chemotherapy regimens for lung and gastrointestinal cancers.
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