Personalised cancer treatment
Source: medicalxpress.com Author: University of Oslo In Norway, more and more people are being affected by cancer of the mouth and throat. In recent years, the incidence has increased but the mortality has remained the same. Cisplatin is one of the most commonly administered cytostatics for this patient group. At the start of treatment, the drug works well. Gradually, though, most patients experience that the tumour develops resistance against this drug and the prognosis for survival then becomes very poor. In her PhD thesis, Jian Gao wanted to find out how the cancer cells could protect themselves against this cytostatic i.e. what is the underlying mechanism of resistance. She therefore cultured various cancer cell lines derived from oral cavity which were given differing doses of the cytostatic cisplatin. A cancer cell line is cultured from patients' cancerous tumours and can live indefinitely in the laboratory. These types of cell lines are used to examine the biology and the changes that have resulted in the development of cancer. Because the cancer cell lines divide in the laboratory, they can also adapt to new growth conditions, for example by becoming resistant to the cytostatic cisplatin in the same way as the cancer tissue in the patients. "First, I had to find those cancer cells that were sensitive to the cytostatic," explains Jian Gao. By identifying the sensitive cancer cell lines that I could make resistant in the laboratory, I could then study which changes took place in the cells as they changed [...]