English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/124371
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Differential organ phenotypes after postnatal Igf1r gene conditional deletion induced by tamoxifen in UBC-CreERT2; Igf1r fl/fl double transgenic mice

AuthorsRodriguez-de la Rosa, Lourdes ; Contreras, Julio ; Varela-Nieto, Isabel ; García Pichel, José
KeywordsIGF1R
Lung
Cochlea
UBC-CreERT2 mice
Cre/lox system
Transgenic mouse
Issue Date2014
PublisherSpringer
CitationTransgenic Research 24(2): 279-294 (2014)
AbstractInsulin-like growth factor type 1 receptor (IGF1R) is a ubiquitously expressed tyrosine kinase that regulates cell proliferation, differentiation and survival. It controls body growth and organ homeostasis, but with specific functions depending on developmental time and cell type. Human deficiency in IGF1R is involved in growth failure, microcephaly, mental retardation and deafness, and its overactivation is implicated in oncogenesis. Igf1r-deficient mice die at birth due to growth retardation and respiratory failure. Although multiple Igf1r tissue-specific mutant lines have been analyzed postnatally, using Igf1r-floxed (Igf1r fl/fl ) mice mated with diverse cell-type recombinase Cre-expressing transgenics, no mouse models for the study of generalized Igf1r deficiency in adults have been reported. To this end we generated UBC-CreERT2; Igf1r fl/fl transgenic mice with an inducible deletion of Igf1r activated by tamoxifen. Tamoxifen administration to 4 week-old prepuberal male mice delayed their growth, producing a distinct impact on organ size 4 weeks later. Whereas testes were smaller, spleen and heart showed an increased organ to body weight ratio. Mosaic Igf1r genomic deletions caused a significant reduction in Igf1r mRNA in all organs analyzed, resulting in diverse phenotypes. While kidneys, spleen and cochlea had unaltered gross morphology, testes revealed halted spermatogenesis, and liver and alveolar lung parenchyma showed increased cell proliferation rates without affecting apoptosis. We demonstrate that UBC-CreERT2 transgenic mice efficiently delete Igf1r upon postnatal tamoxifen treatment in multiple mouse organs, and corroborate that IGF1R function is highly dependent on cell, tissue and organ type.
Descriptionet al.
URIhttp://hdl.handle.net/10261/124371
DOI10.1007/s11248-014-9837-5
Identifiersdoi: 10.1007/s11248-014-9837-5
issn: 0962-8819
e-issn: 1573-9368
Appears in Collections:(IIBM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.