Bacterial Deoxyribonucleoside Kinases Are Poor Suicide Genes in Mammalian Cells

• Transfer of deoxyribonucleoside kinases (dNKs) into cancer cells increases the activity of cytotoxic nucleoside analogues. It has been shown that bacterial dNKs, when introduced into Escherichia coli, sensitize this bacterium toward nucleoside analogues. We studied the possibility of using bacterial dNKs, for example deoxyadenosine kinases (dAKs), to sensitize human cancer cells to gemcitabine. Stable and transient transfections of bacterial dNKs into human cells showed that these were much less active than human and fruitfly dNKs. The fusion of dAK from Bacillus cereus to the green fluorescent protein induced a modest sensitization. Apparently, bacterial dNKs did not get properly expressed or are unstable in the mammalian cell.

Subject headings

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Keyword

bacteria

suicide gene

gene therapy

Deoxyribonucleoside kinases

gemcitabine

cancer

resistance

Publication and Content Type

art (subject category)

ref (subject category)