Strain Name: |
B6C3Fe a/a-Rorasg/J |
|---|---|
Stock Number: |
000237 |
Availability: | Repository-Cryopreserved |
General Terms and Conditions |
| Former Name |
B6C3Fe-a/a-Rorasg/+ (Changed: 15-DEC-04
) |
| Genes & Alleles | Rora; Rorasg; a; |
Type JAX® GEMM® Strain - Mutant Strain Additional information on JAX® GEMM® Strains. Type JAX® GEMM® Strain - Spontaneous Mutation Species laboratory mouse Appearance
black, ataxic, tremors
Related Genotype: a/a Rorasg/Rorasg
black, unaffected
Related Genotype: a/a +/? or a/a Rorasg/+Strain Description
Mice homozygous for the staggerer spontaneous mutation (Rorasg) show a staggering gait, mild tremor, hypotonia, and small size. The cerebellar cortex of homozygous mutant mice is grossly underdeveloped with a deficiency of granule cells and Purkinje cells. The remaining granule cells migrate inward from the external layer prematurely and then degenerate. Purkinje cells are much delayed in postnatal differentiation and lack the dendritic spines on which synapses with the parallel fibers from the granule cells normally occur. Staggerer mutant mice have been used as a source of an agranulate cerebellum in a number of investigations of the composition and function of granule cells. Kopmels et al. have reported a hyperproduction of IL1 biological activity and mRNA from LPS stimulated spleen cells of Rorasg/Rorasg mice on the C57BL/6J background relative to wild type siblings.
Mammalian Phenotype Terms assigned by genotype |
| Allele Symbol | Rorasg | ||
|---|---|---|---|
| Allele Name | staggerer | ||
| Common Name(s) | RORalpha-; sg; | ||
| Strain of Origin | obese stock | ||
| Gene Symbol and Name | Rora, RAR-related orphan receptor alpha | ||
| Chromosome | 9 | ||
| Gene Common Name(s) | 9530021D13Rik; MGC119326; MGC119329; NR1F1; RIKEN cDNA 9530021D13 gene; ROR1; ROR2; ROR3; RZR-ALPHA; RZRA; neuroscience mutagenesis facility, 267; nmf267; sg; staggerer; | ||
| General Note | Homozygotes for the staggerer mutation show a staggering gait, mild tremor, hypotonia, and small size (J:13140). The cerebellar cortex is grossly underdeveloped with a deficiency of granule cells and Purkinje cells. The deficiency of granule cells in theexternal granular layer is already evident at birth. The remaining granule cells migrate inward from the external layer prematurely and then degenerate (J:5304). Purkinje cells are much delayed in postnatal differentiation and lack the dendritic spines on which synapses with the parallel fibers from the granule cells normally occur (J:5968). Golgi cells are not clearly distinguishable from Purkinje cells and it is possible that their number is also reduced (J:6185). Examination of the cerebellum of chimeras of Rorasg/Rorasg with wild-type using cellular markers for Purkinje cells and granule cells has shown that the Rorasg effect is intrinsic to the Purkinje cells and that granule cells are affected secondarily (J:28093, J:11945). Purkinje cells are probably defective as early as postnatal day 4 (J:6875). The granule cell deficiency may result from failure of Purkinje cells to adequately stimulate granule cell genesis (J:28092), as well as from later cell death due to failure of synapsis with Purkinje cells. Staggerer mice have been used as a source of an agranulate cerebellum in a number of investigations of the composition and function of granule cells.Other effects of Rorasg include persistence of multipleinnervation of Purkinje cells by climbing fibers (J:6260), reduction in size of deep cerebellar nuclei (J:6554) and inferior olivary complex (J:7948), and abnormal patterns of ganglioside composition and enzymatic activity (J:7910). Inferior olivary neuron numbers and definition of the olivary subnuclei are normal at birth but decline thereafter (J:20982). Death of inferior olivary neurons, like that of granule cells, is apparently an indirect effect of the Rorasg gene, caused by the lack of Purkinje cells with which to synapse (J:28468).Cerebellar cells of Rorasg/Rorasg mice at 7 days postnatal have immature cell surface components of a type which are present in +/+ cells at late prenatal and neonatal stages (J:6068, J:6088). In particular, the conversion of neural cell adhesion molecules (NCAM) from embryonic to adult form which is normally complete by 21 days does not occur in Rorasg/Rorasg mice (J:6930).Purkinje cells are the predominant siteof expression of calmodulin in the cerebellum of normal mice, but Rorasg/Rorasg mice do not produce any mRNA for the Calm1 locus in these cells (J:28469).Peripheral macrophages of staggerer mice, and those of several other cerebellar mutant mice, show greatly increased production of interleukin 1 beta (J:28095). Since Il1a and Tnf are also hyperexpressed in staggerer macrophages, the increases represent a general condition of hyperexcitability of these cells (J:1431). Il6 hyperexpression was also found in Rorasg/Rorasg mice but not in Grid2/+ animals (J:11652), although the latter did show hyperexpression of Il1a, Il1b, and Tnf (J:2228). Matsui et al. (J:28478) report elevated levels of somatostatin in brainsof several ataxic mouse mutants, including Rorasg homozygotes. The concentration of thyrotropin releasing hormone (TH) is also elevated in brains of these mutants (J:28467), and administration of a TRH analog, YM-14673, ameliorated the ataxia,suggesting that excess TRH may have an ataxic effect (J:18435).The reproductive life of Rorasg/Rorasg female mice is curtailed by late sexual maturation, irregular estrous cycling, and a shortened post-puberal period of reproduction (J:1960). Neonatal vestibular stimulation by rotation on a tilted plain improved gait and body balance in Rorasg/Rorasg mice and also led to improved mating efficiency (J:14535), suggesting that mating defects in these mice may bea secondary effect of the gait and balance difficulties. Long-term selection for ability to reproduce improved the maternal behavior of homozygous staggerer females without abolishing gait and balance difficulties, suggesting that Rorasg effects on reproduction are not entirely due to these difficulties (J:28416).Male staggerer mice are able to differentiate between pheromones secreted by estrous and anestrous females (J:15645). Some male Rorasg/Rorasg mice suffer from a penile disability, the penis in erection being directed rearward. The disability is intermittent even in those males subject to it, and is of little importance in determining male mating deficiency (J:32193).Although Rorasg/+ heterozygotes are behaviorally normal with normal cerebellar cytoarchitecture and composition, these heterozygotes suffer accelerated loss of Purkinje cells, granule cells, and inferior olivary neurons with age (J:1431).Rorasg/Rorasg homozygotesusually die during the fourth week of life. Some survive to adulthood, and one male has bred (J:13140). | ||
| Molecular Note | This allele contains a 6.5kb genomic deletion of an exon encoding part of the ligand binding domain. The deletion results in an exon-skipping event that introduces a shift in the reading frame. The resulting protein is predicted to be truncated due to introduction of a premature stop codon. [MGI Ref ID J:31470] | ||
| Allele Symbol | a | ||
| Allele Name | nonagouti | ||
| Allele | Control | |
|---|---|---|
| Rorasg | Untyped from the colony | |
| Considerations for Choosing Controls | ||
Rorasg
Strains carrying Rorasg allele
002651 B6.C3(Cg)-Rorasg/J 000285 B6.Cg-Rorasg + +/+ Myo5ad Bmp5se/J View Strains carrying Rorasg (2 strains)
Strains carrying a allele
View Strains carrying a (100 strains)
Strains carrying other alleles of Rora
005047 C57BL/6J-Rorasg-3J/J View Strains carrying other alleles of Rora (1 strain)
Strains carrying other alleles of a
View Strains carrying other alleles of a (67 strains)
Rorasg related
Neurobiology Research
Ataxia (Movement) Defects
Cerebellar Defects (Purkinje cell defect)
Receptor Defects
Tremor Defects
Selected Reference(s)
Additional ReferencesMamontova A; Seguret-Mace S; Esposito B; Chaniale C; Bouly M; Delhaye-Bouchaud N; Luc G; Staels B; Duverger N; Mariani J; Tedgui A. 1998. Severe atherosclerosis and hypoalphalipoproteinemia in the staggerer mouse, a mutant of the nuclear receptor RORalpha. Circulation 98(24):2738-43. [PubMed: 9851961] [MGI Ref ID J:52105]
| Strain Name: | B6C3Fe a/a-Rorasg/J |
| Stock Number: | 000237 |
IMPORTANT NOTE: Prices are based on shipping destination. To view prices, select your shipping destination.
| Standard Supply | Repository-Cryopreserved. Must Be Recovered. Please refer to the Supply Notes for further information. |
|---|---|
| Supply Notes |
Cryopreserved Embryos This strain is also available as cryopreserved embryos from our Repository. Orders for cryopreserved embryos are supplied subject to a signed agreement that must be returned to the Customer Service Department after order placement. Experienced technicians at The Jackson Laboratory have recovered frozen embryos of this strain successfully. We will provide you enough embryos to perform two embryo transfers. The Jackson Laboratory does not guarantee successful recovery at your facility. For complete information on purchasing embryos from our repository, please visit our Cryopreserved Embryos web page. Cryorecovery - Standard. The recovery process begins when a signed agreement form is returned to the Customer Service Department after order placement. Although results vary by strain, at least two males and two females (two pairs) will be provided, typically within 15 weeks of our receipt of the signed agreement form. If the first recovery attempt is unsuccessful or only one pair is recovered, a second recovery will be done, extending the delivery time to approximately 25 weeks. At least one member of each pair will be of known genotype and will carry the mutation if it is a mutant strain. Please note that pairs may not reflect the mating scheme utilized by The Jackson Laboratory prior to cryopreservation of the strain. Mating schemes are sometimes modified for successful cryopreservation. Price represents a repository maintenance fee, which includes the cost of recovery of the strain from the cryopreservation resource and the periodic replacement of the frozen embryos used for recovery. Cryorecovery to establish a Dedicated Supply for greater quantities of mice. |
| Licensing | See General Terms and Conditions below |
| Control Information | View Control Information in Strain Details. |
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