A novel in vitro model for studying signal transduction and gene regulation via the growth hormone receptor

1993 ◽  
Vol 7 (8) ◽  
pp. 972-978 ◽  
Author(s):  
S. M. Francis
Keyword(s):  
Signal Transduction ◽  
Growth Hormone ◽  
Gene Regulation ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
In Vitro Model ◽  
Vitro Model

A novel in vitro model for studying signal transduction and gene regulation via the growth hormone receptor.

1993 ◽  
Vol 7 (8) ◽  
pp. 972-978
Author(s):  
S M Francis ◽  
S Enerbäck ◽  
C Möller ◽  
B Enberg ◽  
G Norstedt
Keyword(s):  
Signal Transduction ◽  
Growth Hormone ◽  
Gene Regulation ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
In Vitro Model ◽  
Vitro Model

361 GROWTH HORMONE RECEPTOR MUTANT PIGS PRODUCED BY USING THE CLUSTERED REGULARLY INTERSPACED SHORT PALINDROMIC REPEATS (CRISPR) AND CRISPR-ASSOCIATED SYSTEMS IN IN VITRO-PRODUCED ZYGOTES

2015 ◽  
Vol 27 (1) ◽  
pp. 269 ◽  
Author(s):  
M. Kurome ◽  
M. Dahlhoff ◽  
S. Bultmann ◽  
S. Krebs ◽  
H. Blum ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
Large Animal Model ◽  
Large Animal ◽  
Single Mutation ◽  
Wild Type ◽  
Ghr Gene ◽  
Normal Fertilization

Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated (Cas) technology is considered as an efficient strategy for generating gene edited large animals, such as pigs. Compared to somatic cell nuclear transfer, this new technology offers a relatively simple way to generate mutant pigs by direct injection of RNA into the cytoplasm of zygotes. Moreover, the use of in vitro produced zygotes would provide a highly effective and practical method for the production of porcine disease models for biomedical research. Here we examined the production efficiency of growth hormone receptor (GHR) mutant pigs by the combination of the CRISPR/Cas system and in vitro produced zygotes. In vitro maturation (IVM) of oocytes was performed as described previously (Kurome et al., Meth. Mol. Biol., in press). In all experiments, the same batch of frozen sperm was used. After IVM, around 20 oocytes with expanded cumulus cells were incubated with 5 × 104 spermatozoa in a 100-μL drop of porcine fertilization medium for 7 h. In vitro-produced embryos were assessed by the ratio of normal fertilization (eggs with 2 pronuclei) and blastocyst formation at Day 7. The Cas9 mRNA and a single guide RNA, recognising a short sequence of 20 base pairs in exon 3 of the GHR gene, were injected directly into the cytoplasm of the embryos 8.5 to 9.5 h after IVF. Injected embryos were transferred laparoscopically to recipient pigs, and 86.4% (57/66) of sperm-penetrated oocytes (66/96) exhibited normal fertilization. Incidence of polyspermy was relatively low (9/66, 13.6%). Developmental ability of in vitro-produced embryos to the blastocyst stage was 17.4% (24/138). In total, 426 RNA-injected embryos were transferred into 2 recipients, one of which became pregnant and gave birth to 8 piglets. All piglets were clinically healthy and developed normally. In 3 out of 8 piglets (37.5%), mutations were introduced. Next-generation sequencing revealed that all of them were mosaics: one with a single mutation (22% wild-type/78% mutant) and 2 piglets with 2 different mutations (80% wild-type/2% mutant_1/18% mutant_2 and 94% wild-type/4% mutant_1/2% mutant_2). Four out of 5 mutations caused a frameshift in the GHR gene. Our study reports for the first time generation of GHR mutant pigs by the use of the CRISPR/Cas system in in vitro-produced zygotes. Because all GHR mutant offspring were mosaic, Cas9 activation probably occurred after the 1-cell stage under our experimental conditions. The founder animal with the highest proportion of mutant GHR alleles will be used for breeding to establish a large animal model for Laron syndrome.This work is supported by the German Research Council (TR-CRC 127).

scholarly journals Hematopoietic Differentiation of Embryonic Stem Cells: An In Vitro Model to Study Gene Regulation during Megakaryocytopoiesis

Stem Cells ◽  
1996 ◽  
Vol 14 (S1) ◽  
pp. 194-199 ◽  
Author(s):  
Georges Uzan ◽  
Marie‐Hélène Prandini ◽  
Jean‐Philippe Rosa ◽  
Rolande Berthier
Keyword(s):  
Stem Cells ◽  
Gene Regulation ◽  
Embryonic Stem Cells ◽  
In Vitro Model ◽  
Embryonic Stem ◽  
Hematopoietic Differentiation ◽  
Vitro Model ◽  
Study Gene Regulation

Cloning of two Atlantic salmon growth hormone receptor isoforms and in vitro ligand-binding response

2005 ◽  
Vol 31 (4) ◽  
pp. 315-329 ◽  
Author(s):  
Susana Benedet ◽  
Viktoria Johansson ◽  
Glen Sweeney ◽  
Malyka Galay-Burgos ◽  
Björn Thrandur Björnsson
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Ligand Binding ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
Receptor Isoforms
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