Volume 52, Issue 1 e104
PROTOCOL

New Bicistronic TALENs Greatly Improve Genome Editing

José María Martín-Fernández

José María Martín-Fernández

Karuna Good Cells Technologies SL, Vitoria-Gasteiz, Álava, Spain

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Aarne Fleischer

Aarne Fleischer

Karuna Good Cells Technologies SL, Vitoria-Gasteiz, Álava, Spain

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

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Sara Vallejo-Diez

Sara Vallejo-Diez

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

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Esther Palomino

Esther Palomino

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

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Almudena Sánchez-Gilabert

Almudena Sánchez-Gilabert

Karuna Good Cells Technologies SL, Vitoria-Gasteiz, Álava, Spain

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

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Raúl Ruiz

Raúl Ruiz

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

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Yazmine Bejarano

Yazmine Bejarano

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

Current address: Centro de Investigación del Cáncer, Campus Miguel de Unamuno, Salamanca, Spain

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Pere Llinàs

Pere Llinàs

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

Current address: Josep Carreras Leukaemia Research Institute (IJC), Ctra. de Can Ruti, Camí de les Escoles, Badalona, Spain

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Antoni Gayá

Antoni Gayá

Instituto de Investigación Sanitaria Illes Balears (IDISBA), Fundació Banc de Sang i Teixits de les Illes Balears (FBSTIB), Grupo de Terapia Celular e Ingenieria Tisular, Palma de Mallorca, Spain

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Daniel Bachiller

Corresponding Author

Daniel Bachiller

Consejo Superior de Investigaciones Científicas (CSIC/IMEDEA), Esporles, Spain

Corresponding author: [email protected]Search for more papers by this author
First published: 05 February 2020
Citations: 4

Abstract

Genome editing has become one of the most powerful tools in present-day stem cell and regenerative medicine research, but despite its rapid acceptance and widespread use, some elements of the technology still need improvement. In this unit, we present data regarding the use of a new, more efficient type of transcription activator-like effector nuclease (TALEN) for gene editing. Our group has generated bicistronic genes in which classical TALEN coding sequences are linked by 2A elements to different reporter molecules, such as fluorochromes (TALEN-F) or membrane receptors (TALEN-M). This structure results in two proteins transcribed from the same transcript, of which the second (the reporter) can be used as the target for selection by fluorescence-assisted cell sorting (FACS) or magnetic-activated cell sorting (MACS). The application of these new TALEN genes allows a rapid enrichment of cells in which both members of the TALEN pair are active, thus eliminating the need for lengthy selection in culture and laborious characterization of a large number of clones. © 2020 by John Wiley & Sons, Inc.

Basic Protocol 1: Generation of new TALENs

Basic Protocol 2: Genome editing using TALEN-F

Alternate Protocol 1: Generation of TALEN-M

Support Protocol 1: mRNA in vitro transcription (IVT) of TALEN-T2A-reporter expression vector

Alternate Protocol 2: Editing of primary T cells using TALEN-M

Basic Protocol 3: Verifying gene editing

Support Protocol 2: Rapid expansion protocol for edited T-cells