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Tuesday, February 14, 2012
Stress in cells activates hepatitis viruses
The substances under investigation inhibit the synthesis of nucleotides, which are the basic building blocks of DNA. This is how they exert their immunosuppressive effect: They slow down multiplication of immune cells because these lack building material for duplicating their genetic material. "The lack of DNA building blocks can cause a kind of stress in specific cells, which shows in the activation of a stress protein called p38", says Felix Hoppe-Seyler. "In liver cells, p38 very effectively activates the replication of hepatitis B viruses. "