PMID: 16638223Apr 28, 2006Paper

Protective effect of vitamin C on protein activity in plasma during virus inactivation

Zhongguo shi yan xue ye xue za zhi
Yan LiWen-Xiang Jia

Abstract

To determine whether addition of vitamin C (Vit C) to single-unit plasma could influence the efficacy of inactivating viruses and could maintain the activity of plasma proteins by methylene blue (MB)-light treatment. Vesicular stomatitis virus (VSV) Indiana strain was used as the indicating virus. Human plasma containing VSV was added with different concentrations of Vit C and final concentration 1 micromol/L MB and irradiated by fluorescence at an intensity of 40,000 lx, samples were collected at different times for detection. Cytopathic effect was used to test the effect of virus inactivation. A segment of the nucleic acid encoding capsid protein of VSV was amplified with RT-PCR. Some methods, such as the Clauss method, the one-stage method, microimmunoelectrophoresis, were used to investigate the changes of plasma components. The results showed that when the VSV plasma was added with 240 micromol/L Vit C and treated by MB-light irradiation for 60 min, the titer of VSV decreased by more than 8 lg TICD50/ml. Meanwhile, target segment amplification of VSV was also negative. The recovery rates of fibrinogen and coagulation factor VIII (FVIII: C) were 83.55% and 81.67% respectively, which had significant difference comparing with...Continue Reading

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