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A new genetic tool to improve immune-compromised mouse models: Derivation and CRISPR/Cas9-mediated targeting of NRG embryonic stem cell lines
Univ Copenhagen, Denmark.
Lund Univ, Sweden.
Univ Copenhagen, Denmark.
Univ Copenhagen, Denmark.
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2018 (English)In: Genesis, ISSN 1526-954X, E-ISSN 1526-968X, Vol. 56, no 9, article id e23238Article in journal (Refereed) Published
Abstract [en]

Development of human hematopoietic stem cells and differentiation of embryonic stem (ES) cells/induced pluripotent stem (iPS) cells to hematopoietic stem cells are poorly understood. NOD (Non-obese diabetic)-derived mouse strains, such as NSG (NOD-Scid-il2Rg) or NRG (NOD-Rag1-il2Rg), are the best available models for studying the function of fetal and adult human hematopoietic cells as well as ES/iPS cell-derived hematopoietic stem cells. Unfortunately, engraftment of human hematopoietic stem cells is very variable in these models. Introduction of additional permissive mutations into these complex genetic backgrounds of the NRG/NSG mice by natural breeding is a very demanding task in terms of time and resources. Specifically, since the genetic elements defining the NSG/NRG phenotypes have not yet been fully characterized, intense backcrossing is required to ensure transmission of the full phenotype. Here we describe the derivation of embryonic stem cell (ESC) lines from NRG pre-implantation embryos generated by in vitro fertilization followed by the CRISPR/CAS9 targeting of the Gata-2 locus. After injection into morula stage embryos, cells from three tested lines gave rise to chimeric adult mice showing high contribution of the ESCs (70%-100%), assessed by coat color. Moreover, these lines have been successfully targeted using Cas9/CRISPR technology, and the mutant cells have been shown to remain germ line competent. Therefore, these new NRG ESC lines combined with genome editing nucleases bring a powerful genetic tool that facilitates the generation of new NOD-based mouse models with the aim to improve the existing xenograft models.

Place, publisher, year, edition, pages
WILEY , 2018. Vol. 56, no 9, article id e23238
Keywords [en]
CRISPR; Cas9; hematopoiesis; ES cell derivation; Gata-2; immunodeficient mice; NRG
National Category
Cell and Molecular Biology
Identifiers
URN: urn:nbn:se:liu:diva-151948DOI: 10.1002/dvg.23238ISI: 000445606900004PubMedID: 30010246OAI: oai:DiVA.org:liu-151948DiVA, id: diva2:1256337
Note

Funding Agencies|Cancerfonden; Barncancerfonden; "start-up grant" from Linkoping University; NovoNordisk Foundation

Available from: 2018-10-16 Created: 2018-10-16 Last updated: 2018-10-16

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Cammenga, Jörg
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Division of Surgery, Orthopedics and OncologyFaculty of Medicine and Health SciencesDepartment of Haematology
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