title: Effects of electrolytes on virus inactivation by acidic solutions.
abstract: Acidic pH is frequently used to inactivate viruses. We have previously shown that arginine synergizes with low pH in enhancing virus inactivation. Considering a potential application of the acid inactivation of viruses for the prevention and treatment of superficial virus infection at body surfaces and fixtures, herein we have examined the effects of various electrolytes on the acid-induced inactivation of the herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2), the influenza A virus (IAV) and the poliovirus upon their incubation at 30˚C for 5 min. Eight electrolytes, i.e., phosphate, NaCl, glutamate, aspartate, pyrrolidone carboxylate, citrate, malate and acetate were tested. No detectable inactivation of the poliovirus was observed under the conditions examined, reflecting its acid-resistance. HSV-1 and HSV-2 responded similarly to the acid-treatment and electrolytes. Some electrolytes showed a stronger virus inactivation than others at a given pH and concentration. The effects of the electrolytes were virus-dependent, as IAV responded differently from HSV-1 and HSV-2 to these electrolytes, indicating that certain combinations of the electrolytes and a low pH can exert a more effective virus inactivation than other combinations and that their effects are virus-specific. These results should be useful in designing acidic solvents for the inactivation of viruses at various surfaces.
authors.affiliation: Division of Virology, Department of Cellular and Molecular Medicine, Wakayama Medical University Graduate School of Medicine, Wakayama, Japan.
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Nishide
authors.forename: Kazuko
authors.initials: K
authors.lastname: Tsujimoto
authors.forename: Misao
authors.initials: M
authors.lastname: Uozaki
authors.forename: Keiko
authors.initials: K
authors.lastname: Ikeda
authors.forename: Hisashi
authors.initials: H
authors.lastname: Yamasaki
authors.forename: A Hajime
authors.initials: AH
authors.lastname: Koyama
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Arakawa
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000494:pharmacology*; D001120:Arginine / Q000494:pharmacology; D002460:Cell Line; D002522:Chlorocebus aethiops; D004573:Electrolytes / Q000494:pharmacology; D018259:Herpesvirus 1, Human / Q000187:drug effects; D018258:Herpesvirus 2, Human / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D009980:Influenza A virus / Q000187:drug effects; D012996:Solutions; D012997:Solvents; D014709:Vero Cells; D038301:Virus Inactivation
chemical_list: D000998:Antiviral Agents; D004573:Electrolytes; D012996:Solutions; D012997:Solvents; D001120:Arginine