Rahmi Dianty1,2 , Junki Hirano1,2 , Itsuki Anzai1,3 , Yuta Kanai1,4 , Tsuyoshi Hayashi5 , Masae Morimoto6 , Chikako Kataoka-Nakamura6 , Sakura Kobayashi5 , Kentaro Uemura1,2 , Chikako Ono1,2 , Tokiko Watanabe1,3,7 , Takeshi Kobayashi1,4,7 , Kosuke Murakami5 , Kenji Kikuchi8 , Kunimoto Hotta8 , Toshikazu Yoshikawa8 , Shuhei Taguwa1,2,7 * and Yoshiharu Matsuura1,2,7 *
1 Laboratory of Virus Control, Center for Infectious Disease Education and Research, Osaka University, Osaka, Japan, 2Laboratory of Virus Control, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan, 3Laboratory of Molecular Virology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan, 4Laboratory of Virology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan, 5Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan, 6Innovative Vaccine Research and Development Center, The Research Foundation for Microbial Diseases of Osaka University, Osaka, Japan, 7 Center for Advanced Modalities and DDS, Osaka University, Osaka, Japan, 8Louis Pasteur Center for Medical Research, Kyoto, Japan
It is essential to employ efficient measures to prevent the transmission of pathogenic agents during a pandemic. One such method involves using hypochlorous acid (HClO) solution. The oxidative properties of HClO water (HAW) can contribute to its ability to eliminate viral particles. Here, we examined a highly purified slightly acidic hypochlorous acid water (Hp-SA-HAW) obtained from the reverse osmosis membrane treatment of an electrolytically-generated SA-HAW for its anti-viral activity and mode of action on viral proteins. Hp-SA-HAW exhibited broad-spectrum antiviral effects against various viruses, including adenovirus, hepatitis B virus, Japanese encephalitis virus (JEV), and rotavirus. Additionally, Hp-SA-HAW treatment dose-dependently resulted in irreversibly aggregated multimers of the JEV envelope and capsid proteins. However, Hp-SA-HAW treatment had no discernible effect on viral RNA, indicating that Hp-SA HAW acts against amino acids rather than nucleic acids. Furthermore, Hp-SA-HAW substantially reduced the infectivity of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including the ancestral variant and other multiple variants. Hp-SA-HAW treatment induced the aggregation of the SARS-CoV-2 spike and nuclear proteins and disrupted the binding of the purified spike protein of SARS-CoV-2 to human ACE2. This study demonstrates that the broad-spectrum virucidal activity of highly purified HClO is attributed to viral protein aggregation of virion via protein oxidation.
KEYWORDS
hypochlorous acid, virucide, SARS-CoV-2, oxidation, protein aggregation
T. Fukuyama1 | B. C. Martel1 | K. E. Linder2 | S. Ehling1 | J. R. Ganchingco1 | W. B€aumer1,3
Summary
Background: It has been reported that topical hypochlorous acid (HOCl) formulations lead to relief of itch in human patients with atopic dermatitis; however, the specific antipruritic mechanism of action remains unclear.
Objective: To confirm itch relief and reduction of lesions in a mouse model of atopic dermatitis and to elucidate possible HOCl’s mode of action.
Methods: In this study, the effects of topical administration of HOCl hydrogel (0.05%) on atopic dermatitis-like lesions in NC/Nga mice model as well as in vitro effects of HOCl on dorsal root ganglia neurons and mouse bone marrow-derived dendritic cells (mBMDCs) were investigated. NC/Nga mice were sensitized with house dust mite allergen and treated topically with HOCl hydrogel both preventively and therapeutically against established lesions. Allergen challenge was continued during HOCl hydrogel application.
Results: Treatment with HOCl hydrogel prevented the development of lesions and scratching bouts during the whole observation period. When administered after full development of lesions, HOCl reduced lesions and scratching behaviour to a similar extent as a positive control 0.1% betamethasone dipropionate ointment. The reduced inflammatory response by HOCl treatment was demonstrated by reduced secretion of inflammatory cytokines in affected skin tissue from NC/Nga mice. In addition, HOCl significantly reduced IL-12 production in mBMDC. The diminished scratching behaviour was confirmed by impaired response to several pruritogens in dorsal root ganglia neurons excised from NC/Nga mice after termination of the studies. The response to the stimuli was also reduced by pre-incubation of sensory neurons from untreated BALB/c mice with 0.0001% HOCl. Conclusions and Clinical Relevance: These data indicate a direct reduction in sensory response by HOCl, leading to significantly reduced itch and inflammation in vivo.
atopic dermatitis, dorsal root ganglia, hypochlorous acid, IgE, IL-13, IL-4, NC/Nga mice, sensory neurons
This article is excerpted from the《Frontiers in Genetics》by Wound World
伤口世界平台生态圈,以“关爱人间所有伤口患者”为愿景,连接、整合和拓展线上和线下的管理慢性伤口的资源,倡导远程、就近和居家管理慢性伤口,解决伤口专家的碎片化时间的价值创造、诊疗经验的裂变复制、和患者的就近、居家和低成本管理慢性伤口的问题。
2019广东省医疗行业协会伤口管理分会年会
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