Inactivation of Adeno-Associated Viral Vectors by Oxidant-Based Disinfectants.

Abstract:

:Adeno-associated viral (AAV) vectors are becoming increasingly popular in basic research as well as in clinical gene therapy. Due to its exceptional resistance against physical and chemical stress, however, the increasing use of AAV in laboratories and clinics around the globe raises safety concerns. Proper decontamination of tools and surfaces based on reliable AAV inactivation is crucial to prevent uncontrolled vector dissemination. Although recommended for AAV decontamination, sodium hypochlorite is not compatible with all surfaces found in the laboratory or clinical environment due to its corrosive nature. We, therefore, compared 0.5% sodium hypochlorite to 0.25% peracetic acid (PAA), a second substance declared effective, and to three less aggressive, commonly available alternative disinfectants 70% ethanol, 1.5% hydrogen peroxide, and 0.45% potassium peroxymonosulfate. The impact of all five disinfectants on virus capsid integrity, viral genome integrity, and infectivity upon different exposure times was tested on AAV2 and AAV5, two serotypes with highly different thermostability. While sodium hypochlorite, potassium peroxymonosulfate, and PAA successfully inactivated AAV2 after 1, 5, and 30 min, respectively, ethanol and hydrogen peroxide did not show significant effects on AAV2 even after exposure for 30 min. For AAV5, only sodium hypochlorite and potassium peroxymonosulfate proved efficient capsid and genome denaturation after incubation for 1 and 30 min, respectively. Consequently, ethanol or hydrogen peroxide should not be considered for routine laboratory or clinical use, while 0.45% potassium peroxymonosulfate and 0.5% sodium hypochlorite represent suitable and broadly effective disinfectants for AAV inactivation.

journal_name

Hum Gene Ther

journal_title

Human gene therapy

authors

Korte J,Mienert J,Hennigs JK,Körbelin J

doi

10.1089/hum.2020.120

subject

Has Abstract

pub_date

2020-11-06 00:00:00

eissn

1043-0342

issn

1557-7422

pub_type

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