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Sensitivity of anticancer drugs in NIH3T3' cells transfected with oncogenes accompanied by pSV2neo vector
X S Gao1, J Asaumi, S Kawasaki
1Department of Radiology, Okayama University Medical School, Japan.
Abstract:
NIH3T3 cells and NIH3T3 cell lines, which were transfected with several oncogenes accompanied by pSV2neo vector, were observed for their survival rate when treated with commonly used anticancer drugs. The survival rates in the cell line transfected with the pSV2neo vector only did not differ significantly from that of parental NIH3T3 cells against bleomycin, nimustine and adriamycin, but it was significantly more resistant to cisplatin and more sensitive to mitomycin C. Therefore, the survival rate in each transfectant was compared with that in the pSV2neo transfectant. The Val-12, v-Ha-ras, v-int-2, v-erbB or v-abl transfectants accompanied by pSV2neo vector were significantly more sensitive to cisplatin than transfection with pSV2neo vector only. The Val-12, v-Ha-ras, v-int-2 and v-abl transfectants were significantly more sensitive, and the v-erbB transfectant more resistant to bleomycin than the pSV2neo transfectant. The v-int-2, v-erbB, frg, v-raf and v-myc transfectants were more sensitive, and the v-Ha-ras transfectant more resistant to nimustine than the pSV2neo transfectant. The N-ras, v-Ha-ras, v-sis, v-int, v-abl and v-myc transfectants were significantly more sensitive to adriamycin than the pSV2neo transfectant. The v-sis and v-int-2 transfectants were more sensitive, and the c-Ki-ras, Val-12, v-erbB and the v-src transfectants more resistant to mitomycin C than the pSV2neo transfectant. Thus there was no relationship between the drug sensitivity and the location of oncogenes, but the transfection was associated with either increased or decreased sensitivity to a number of commonly used anticancer drugs. Therefore, it may be important to take into consideration or overexpression of oncogenes in cancer chemotherapy.
Insights
Transfecting NIH3T3 cells with oncogenes altered their sensitivity to common anticancer drugs, impacting chemotherapy effectiveness. Understanding oncogene expression is crucial for successful cancer treatment strategies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Cancer chemotherapy relies on drugs targeting rapidly dividing cells.
- Oncogenes play a critical role in cell proliferation and cancer development.
- Understanding how oncogenes influence drug sensitivity is vital for personalized medicine.
Purpose of the Study:
- To investigate the impact of oncogene transfection on NIH3T3 cell sensitivity to various anticancer drugs.
- To determine if oncogene overexpression affects cellular response to chemotherapy agents.
- To identify potential correlations between specific oncogenes and altered drug resistance or sensitivity.
Main Methods:
- NIH3T3 cells were transfected with specific oncogenes and a pSV2neo vector.
- Parental and transfected cell lines were treated with anticancer drugs: cisplatin, bleomycin, nimustine, adriamycin, and mitomycin C.
- Cellular survival rates were measured to assess drug sensitivity and resistance.
Main Results:
- Transfection with pSV2neo vector alone showed varied sensitivity compared to parental cells, notably increased resistance to cisplatin and sensitivity to mitomycin C.
- Oncogene-transfected cells exhibited significant alterations in drug sensitivity, with increased sensitivity to cisplatin, bleomycin, nimustine, and adriamycin observed for various oncogenes.
- Conversely, some oncogene transfectants displayed increased resistance to certain drugs like bleomycin, nimustine, mitomycin C, and cisplatin.
Conclusions:
- Oncogene transfection significantly modifies NIH3T3 cell sensitivity to multiple anticancer drugs.
- No direct relationship was found between oncogene location and drug sensitivity, but overexpression is a key factor.
- The study highlights the importance of considering oncogene status in cancer chemotherapy to optimize treatment efficacy.