TAILIEUCHUNG - Kumagai et al. AMB Express 2011, 1:23 http://www.amb-express.com/content/1/1/23 ORIGINAL Open

Kumagai et al. AMB Express 2011, 1:23 ORIGINAL Open Access Sensitivity to electrical stimulation of human immunodeficiency virus type 1 and MAGIC-5 cells Etsuko Kumagai1*, Masato Tominaga2 and Shinji Harada3 Abstract To determine the sensitivities to low electrical potential of human immunodeficiency virus type 1 (HIV-1) and its target cells, HIV-1 and MAGIC-5 cells were directly stimulated with a constant direct current potential of V (vs. Ag/AgCl). HIV-1 was incubated for 3 h at 37°C on a poly-L-lysine-coated indium-tin oxide electrode, and then stimulated by an electrical potential. MAGIC-5 cells were seeded onto the electrically stimulated HIV-1 and cultured for 3 days at. | o AMB Express a SpringerOpen Journal Kumagai et al. AMB Express 2011 1 23 http content 1 1 23 ORIGINAL Open Access Sensitivity to electrical stimulation of human immunodeficiency virus type 1 and MAGIC-5 cells Etsuko Kumagai1 Masato Tominaga2 and Shinji Harada3 Abstract To determine the sensitivities to low electrical potential of human immunodeficiency virus type 1 HIV-1 and its target cells HIV-1 and MAGIC-5 cells were directly stimulated with a constant direct current potential of V vs. Ag AgCl . HIV-1 was incubated for 3 h at 37 C on a poly-L-lysine-coated indium-tin oxide electrode and then stimulated by an electrical potential. MAGIC-5 cells were seeded onto the electrically stimulated HIV-1 and cultured for 3 days at 37 C. HIV-1-infected cells were measured by multinuclear activation via a galactosidase indicator assay. MAGIC-5 cells were also stimulated by an electrical potential of V cell damage proliferation and apoptosis were evaluated by trypan blue staining cell counting and in situ apoptosis detection respectively. HIV-1 was found to be damaged to a greater extent by electrical stimulation than the cells. In particular after application of a potential for 3 min HIV-1LAIand HIV-1KMT infection were inhibited by about 90 but changes in cell damage proliferation and apoptosis were virtually undetectable. These results suggested that HIV-1 is significantly more susceptible to low electrical potential than cells. This finding could form the basis of a novel therapeutic strategy against HIV-1 infection. Keywords HIV-1 infectivity electrical stimulation indium-tin oxide poly-L-lysine Introduction Infection with human immunodeficiency virus type 1 HIV-1 the causative agent of acquired immunodeficiency syndrome AIDS leads to depressed cellular immunity and can result in co-infection with opportunistic pathogens and severe disease Gottlie et al. 1981 Masur et al. 1981 Aboulafia 2000 Picker et al. 2006 . The available treatments

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