Generation of an Allelic Series at the Ahr Locus Using an Edited Recombinant Approach
| Autor: | Jeremiah S. Yee, Rachel H Wilson, Clifford Dustin Rubinstein, Nicholas A Goetz, Jessica C. Parrott, Manabu Nukaya, Susan M. Moran, E.W.N. Glover, Brenda L Rojas, Kathy J. Krentz, Christopher A. Bradfield, Yongna Xing, Patrick R. Carney |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Mutant Locus (genetics) Toxicology 03 medical and health sciences Mice 0302 clinical medicine Emerging Technologies Methods and Models Basic Helix-Loop-Helix Transcription Factors Animals Allele Receptor Transcription factor Alleles Phenocopy Genetics Mice Knockout biology Aryl Hydrocarbon Receptor Nuclear Translocator respiratory system Aryl hydrocarbon receptor Stop codon respiratory tract diseases Mice Inbred C57BL 030104 developmental biology Liver Receptors Aryl Hydrocarbon biology.protein 030217 neurology & neurosurgery |
| Zdroj: | Toxicol Sci |
| ISSN: | 1096-0929 |
| Popis: | The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor and a member of the PER-ARNT-SIM (PAS) superfamily of environmental sensors. The AHR is involved in a series of biological processes including adaptive metabolism of xenobiotics, toxicity of certain environmental pollutants, vascular development, fertility, and immune function. Mouse models, including the Ahr null and Ahr conditional null (Ahrfx) mice, are widely used for the study of AHR-mediated biology and toxicity. The Ahr conditional null mouse harbors the low-affinity Ahrd allele that exhibits approximately a 10-fold lower binding affinity for certain xenobiotic AHR ligands than the widely used C57BL/6 mouse that harbors the higher affinity Ahrb1 allele. Here, we report a novel mouse model that introduces a V375A polymorphism that converts the low-affinity allele into a high-affinity allele, offering a more sensitive conditional model. In the generation of this novel conditional allele, two additional mutants arose, including a 3-bp deletion in the PAS-B domain (AhrNG367R) and an early termination codon in the PAS-B domain (AhrTer383). The AhrNG367R allele presents as a phenocopy of the null and the AhrTer383 allele presents as an antimorph when assessing for the ductus venosus and liver lobe weight endpoints. These new models represent a series of tools that will be useful in further characterizing AHR biology. |
| Databáze: | OpenAIRE |
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