MERAN KESHAWA EDIRIWEERA*
BIOCELL, Vol.47, No.3, pp. 441-444, 2023, DOI:10.32604/biocell.2023.025747
- 03 January 2023
Abstract Irregularities in the DNA repair pathways are frequently observed in cancer. Dysregulated DNA repair
pathways support growth advantages to tumor cells. DNA polymerase-theta (POLQ) is an error-prone DNA
polymerase involved in double-strand break repair through microhomology-mediated end joining (MMEJ). POLQ
also mediates translesion DNA synthesis and it is largely not expressed in normal cells. POLQ is overexpressed in a
range of cancer cells, including homologous recombination (HR) deficient cancer cells. In HR deficient cells, MMEJ is
crucial as a backup DNA repair pathway, indicating the indispensable role of POLQ-mediated MMEJ in HR deficient
cancer cells. More >
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