Anna Karlsson research group

Nucleosides, nucleotides and nucleoside analogues

Our research group studies how DNA building blocks are formed and how to modify this synthesis so that the DNA chain cannot be copied. The group of drugs that act as inhibitors by making false DNA building blocks is called nucleoside analogues and is used to treat both viral diseases and cancer. A prerequisite for the nucleoside analogues to be active, they must become phosphorylated to the corresponding triphosphates by either viral or cellular enzymes and then inhibit viral or cellular DNA synthesis. We study the enzyme systems needed to activate these drugs inside the cells. The activation can be described as a three-stage rocket in that different phosphate groups are added in three subsequent steps. Thereafter, the drug can stop the synthesis of the DNA chain. An important area of our research is to explore new targets for the treatment of HIV and to understand what causes the side effects of treatment. Side effects are often caused by disturbed mitochondrial function by the nucleoside analogues inhibiting the mitochondrial DNA synthesis.

In our studies of how the building blocks of mitochondrial DNA are formed, we have also another important applications of our research. It is to understand the mechanism of some diseases caused by improper functioning of the cell's mitochondrial DNA synthesis.


Selected publications

Research techniques

  • Cell and molecular biology
  • Enzyme assays
  • Transgenic models

Teaching assignments

  • The group is responsible for a microbiology course and lectures in virology at the various training programs.
  • Examiner for project work in the BMA programme.
  • Responsible for the area Scientific competence in the Curriculum Committee for the 6-year medical program.