Description

The genotypes of the animals provided may not reflect those discussed in the strain description or the mating scheme utilized by The Jackson Laboratory prior to cryopreservation. Please inquire for possible genotypes for this specific strain.

Strain Information

Former Names C57BL/6J-Epha4rb-2J/J    (Changed: 22-JUN-09 ) C57BL/6J-rb2J/+    (Changed: 15-DEC-04 ) Type Mutant Strain; Spontaneous Mutation; Additional information on Genetically Engineered and Mutant Mice. Visit our online Nomenclature tutorial. Species laboratory mouse H2 Haplotype b Generation F200+F23+N1p Generation Definitions

Appearance
black, hopping gait
Related Genotype: a/a Epha4^rb-2J/Epha4^rb-2J

black, unaffected
Related Genotype: a/a Epha4^rb-2J/+ or a/a +/?

Important Note
The C57BL/6J background strain is homozygous for the age related hearing loss mutation Cdh23^ahl, which on this background causes progressive hearing loss with onset after 10 months of age.

Description
Mice homozygous for the Epha4^rb-2J allele can be visibly identified by 2.5 - 3 weeks of age by a constant hopping gait of the hind limbs; the forelimbs may show a hopping gait or move normally. When picked up by the tail mutants clasp their hindlimbs and show reduced ability to hold on to an edge; forelimbs show normal strength. More severely affected homozygous mutant mice also lean frequently to either side, a phenotype not reported in mice homozygous for the rb allele of Epha4. Homozygous females may deliver 2-3 pups per litter but often exhibit poor nurturing.

Development
The rb^2J allele of the Epha4 gene arose on the C57BL/6J inbred strain as a spontaneous recessive mutation at the Jackson Laboratory in 1997 when that inbred was at F200. This strain has been maintained primarily by breeding homozygous females with heterozygous males. However, because homozygous females are not good breeders and often do not care for their pups well, ovarian transplantation has been used on occasion to maintain this strain. In 2004 this strain reached F200+F18.

Control Information

	Control
	Heterozygote from the colony
	000664 C57BL/6J
Considerations for Choosing Controls

Related Strains

Strains carrying   Cdh23^ahl allele

001137	129P1/ReJ
000690	129P3/J
000691	129X1/SvJ
000646	A/J
000647	A/WySnJ
003070	ALR/LtJ
003072	ALS/LtJ
004502	B6;AKR-Lxl2/GrsrJ
001026	BALB/cByJ
000653	BUB/BnJ
005494	C3.129S1(B6)-Grm1rcw/J
000664	C57BL/6J
004764	C57BL/6J-Cdh23v-8J/J
004820	C57BL/6J-Kcne12J/J
004703	C57BL/6J-Kcnq2Nmf134/J
004811	C57BL/6J-nmf110/J
004812	C57BL/6J-nmf111/J
004747	C57BL/6J-nmf118/J
004656	C57BL/6J-nmf88/J
004391	C57BL/6J-Chr 13A/J/NaJ
004385	C57BL/6J-Chr 7A/J/NaJ
000662	C57BLKS/J
000667	C57BR/cdJ
000668	C57L/J
000669	C58/J
010614	CBACa.B6-Cdh23ahl/Kjn
000657	CE/J
000670	DBA/1J
001140	DBA/1LacJ
000671	DBA/2J
007048	DBA/2J-Gpnmb+/SjJ
002106	KK/HlJ
000675	LG/J
000676	LP/J
000677	MA/MyJ
001976	NOD/ShiLtJ
002050	NOR/LtJ
000679	P/J
002747	SENCARB/PtJ
002335	SKH2/J
003392	STOCK Crb1rd8/J

View Strains carrying   Cdh23^ahl     (41 strains)

Strains carrying other alleles of Cdh23

001137	129P1/ReJ
000690	129P3/J
000691	129X1/SvJ
000646	A/J
000647	A/WySnJ
003070	ALR/LtJ
003072	ALS/LtJ
002552	B6(V)-Cdh23v-2J/J
002756	B6.CAST-Cdh23Ahl+/Kjn
010615	B6.CBACa-Cdh23CBA/CaJ/Kjn
004502	B6;AKR-Lxl2/GrsrJ
002432	B6J x B6.C-H2-Kbm1/ByJ-Cdh23v-J/J
001026	BALB/cByJ
000653	BUB/BnJ
005494	C3.129S1(B6)-Grm1rcw/J
000664	C57BL/6J
004764	C57BL/6J-Cdh23v-8J/J
004819	C57BL/6J-Cdh23v-9J/J
004820	C57BL/6J-Kcne12J/J
004703	C57BL/6J-Kcnq2Nmf134/J
004811	C57BL/6J-nmf110/J
004812	C57BL/6J-nmf111/J
004747	C57BL/6J-nmf118/J
004656	C57BL/6J-nmf88/J
004391	C57BL/6J-Chr 13A/J/NaJ
004385	C57BL/6J-Chr 7A/J/NaJ
000662	C57BLKS/J
000667	C57BR/cdJ
000668	C57L/J
000669	C58/J
010614	CBACa.B6-Cdh23ahl/Kjn
005016	CByJ;B6-Cdh23v-10J/J
000657	CE/J
000670	DBA/1J
001140	DBA/1LacJ
000671	DBA/2J
007048	DBA/2J-Gpnmb+/SjJ
002106	KK/HlJ
000675	LG/J
000676	LP/J
000677	MA/MyJ
001976	NOD/ShiLtJ
002050	NOR/LtJ
000679	P/J
002747	SENCARB/PtJ
002335	SKH2/J
003392	STOCK Crb1rd8/J
000275	V/LeJ

View Strains carrying other alleles of Cdh23     (48 strains)

Strains carrying other alleles of Epha4

000938	B6 x STOCK Epha4rb/J
001502	C3Sn.B6-Epha4rb/EiGrsrJ
012916	STOCK Epha4tm1.1Bzh/J

View Strains carrying other alleles of Epha4     (3 strains)

Phenotype

Phenotype Information

View Mammalian Phenotype Terms

Mammalian Phenotype Terms provided by MGI

      assigned by genotype

Epha4^rb-2J/Epha4^rb-2J

        C57BL/6J

• behavior/neurological phenotype
• abnormal locomotor behavior
  • unlike the less severe rb mutant, rb-2J mutant mice lean frequently to either side   (MGI Ref ID J:87289)
• • abnormal gait
    • mutant mice can be identified by 2.5-3 weeks of age by a constant hopping gait of the hindlimbs   (MGI Ref ID J:87289)
    • the forelimbs may show a hopping gait or move normally   (MGI Ref ID J:87289)
• abnormal maternal nurturing
  • females are poor at nurturing their young   (MGI Ref ID J:87289)
• decreased grip strength
  • mutants show a reduced ability to hold onto an edge   (MGI Ref ID J:87289)
  • forelimbs show normal strength   (MGI Ref ID J:87289)
• limb grasping
  • mice grasp their hind limbs when picked up by the tail   (MGI Ref ID J:87289)
• endocrine/exocrine gland phenotype
• cryptorchism
  • males sometimes have undescended testes and fail to breed   (MGI Ref ID J:87289)
• reproductive system phenotype
• cryptorchism
  • males sometimes have undescended testes and fail to breed   (MGI Ref ID J:87289)
• decreased litter size
  • females produce small litters   (MGI Ref ID J:87289)
• reduced male fertility
  • due to undescended testes   (MGI Ref ID J:87289)

View Research Applications

Research Applications

This mouse can be used to support research in many areas including:

Cdh23^ahl related

Neurobiology Research
Hearing Defects
      Age related hearing loss

Sensorineural Research
Hearing Defects
      Age related hearing loss

Epha4^rb-2J related

Neurobiology Research
Ataxia (Movement) Defects

Genes & Alleles

Gene & Allele Information provided by MGI

Allele Symbol		Epha4rb-2J
Allele Name		rabbit 2 Jackson
Allele Type		Spontaneous
Strain of Origin		C57BL/6J
Gene Symbol and Name		Epha4, Eph receptor A4
Chromosome		1
Gene Common Name(s)		2900005C20Rik; AI385584; Cek8; HEK8; RGD1560587; RIKEN cDNA 2900005C20 gene; SEK; Sek; Sek1; TYRO1; expressed sequence AI385584; rabbit; rb; segmentation receptor tyrosine kinase;
Molecular Note		The rb2J mouse arose in 1997 at the Jackson Laboratory. This mouse was identified as an allele at the Epha4 locus based complementation analysis using the Epha4Gt(pGT1TM)38Wcs allele. The mutation at the level of the sequence has not been reported. [MGI Ref ID J:87289]
Allele Symbol		Cdh23ahl
Allele Name		age related hearing loss 1
Allele Type		QTL
Common Name(s)		Cdh23753A; mdfw;
Strain of Origin		multiple strains
Gene Symbol and Name		Cdh23, cadherin 23 (otocadherin)
Chromosome		10
Gene Common Name(s)		4930542A03Rik; CDHR23; RIKEN cDNA 4930542A03 gene; USH1D; W; age related hearing loss 1; ahl; bob; bobby; bus; bustling; mdfw; modifier of deaf waddler; neuroscience mutagenesis facility, 112; neuroscience mutagenesis facility, 181; neuroscience mutagenesis facility, 252; nmf112; nmf181; nmf252; sals; salsa; v; waltzer;
Molecular Note		Genetic complementation tests have shown allelism between the mdfw (modifier of deaf waddler) locus and the ahl locus. Further analysis has identified an association between ahl and a G to A transition at nucleotide position 753 of Cdh23. This hypomorphic allele causes in frame skipping of exon 7 and reduced message stability. Twenty-seven strains classified with ahl and carrying the 753A allele include: CD1, RBF/DnJ, PL/J, AKR/J, RF/J, BALB/cBy, A/WySnJ, P/J, SENCARA/PtJ, DBA/1J, ALS/LtJ, C58/J, C57BLKS/J, 129P1/ReJ, C57BR/cd, SKH2/J, BUB/Bn, MA/MyJ, LP/J, 129X1/SvJ, NOR/LtJ, A/J, C57BL/6, NOD/LtJ, DBA/2J, ALR/LtJ, C57L/J. Strains classified with ahl that DO NOT carry this mutation include: C3H/HeSnJ, I/LnJ,YBR/Ei, MRL/MpJ. [MGI Ref ID J:86905]

Genotyping

Genotyping Information

Helpful Links

Genotyping resources and troubleshooting

References

References provided by MGI

Selected Reference(s)

Cook SA; Eicher EM; Samples RM; Bronson RT; Davisson MT. 2004. Two spontaneous mutant alleles, rb and rb-2J, of the Epha4 gene on mouse Chromosome 1. Mouse Mutant Resources Web Site, The Jackson Laboratory, Bar Harbor, Maine MGI Direct Data Submission :.  [MGI Ref ID J:87289]

Additional References

Cdh23^ahl related

Davis RR; Newlander JK; Ling X; Cortopassi GA; Krieg EF; Erway LC. 2001. Genetic basis for susceptibility to noise-induced hearing loss in mice. Hear Res 155(1-2):82-90. [PubMed: 11335078]  [MGI Ref ID J:69679]

Di Palma F; Pellegrino R; Noben-Trauth K. 2001. Genomic structure, alternative splice forms and normal and mutant alleles of cadherin 23 (Cdh23). Gene 281(1-2):31-41. [PubMed: 11750125]  [MGI Ref ID J:73941]

Han F; Yu H; Tian C; Chen HE; Benedict-Alderfer C; Zheng Y; Wang Q; Han X; Zheng QY. 2010. A new mouse mutant of the Cdh23 gene with early-onset hearing loss facilitates evaluation of otoprotection drugs. Pharmacogenomics J :. [PubMed: 20644563]  [MGI Ref ID J:174758]

Johnson KR; Erway LC; Cook SA; Willott JF; Zheng QY. 1997. A major gene affecting age-related hearing loss in C57BL/6J mice Hear Res 114(1-2):83-92. [PubMed: 9447922]  [MGI Ref ID J:44966]

Johnson KR; Longo-Guess C; Gagnon LH; Yu H; Zheng QY. 2008. A locus on distal chromosome 11 (ahl8) and its interaction with Cdh23 ahl underlie the early onset, age-related hearing loss of DBA/2J mice. Genomics 92(4):219-25. [PubMed: 18662770]  [MGI Ref ID J:139223]

Johnson KR; Yu H; Ding D; Jiang H; Gagnon LH; Salvi RJ. 2010. Separate and combined effects of Sod1 and Cdh23 mutations on age-related hearing loss and cochlear pathology in C57BL/6J mice. Hear Res 268(1-2):85-92. [PubMed: 20470874]  [MGI Ref ID J:163035]

Johnson KR; Zheng QY; Bykhovskaya Y; Spirina O; Fischel-Ghodsian N. 2001. A nuclear-mitochondrial DNA interaction affecting hearing impairment in mice. Nat Genet 27(2):191-4. [PubMed: 11175788]  [MGI Ref ID J:67312]

Johnson KR; Zheng QY; Noben-Trauth K. 2006. Strain background effects and genetic modifiers of hearing in mice. Brain Res 1091(1):79-88. [PubMed: 16579977]  [MGI Ref ID J:110459]

Johnson KR; Zheng QY; Weston MD; Ptacek LJ; Noben-Trauth K. 2005. The Mass1(frings) mutation underlies early onset hearing impairment in BUB/BnJ mice, a model for the auditory pathology of Usher syndrome IIC. Genomics 85(5):582-90. [PubMed: 15820310]  [MGI Ref ID J:97534]

Keithley EM; Canto C; Zheng QY; Fischel-Ghodsian N; Johnson KR. 2004. Age-related hearing loss and the ahl locus in mice. Hear Res 188(1-2):21-8. [PubMed: 14759567]  [MGI Ref ID J:87783]

Liu X; Bulgakov OV; Darrow KN; Pawlyk B; Adamian M; Liberman MC; Li T. 2007. Usherin is required for maintenance of retinal photoreceptors and normal development of cochlear hair cells. Proc Natl Acad Sci U S A 104(11):4413-8. [PubMed: 17360538]  [MGI Ref ID J:118927]

Manji SS; Williams LH; Miller KA; Ooms LM; Bahlo M; Mitchell CA; Dahl HH. 2011. A mutation in synaptojanin 2 causes progressive hearing loss in the ENU-mutagenised mouse strain Mozart. PLoS One 6(3):e17607. [PubMed: 21423608]  [MGI Ref ID J:171701]

Mathews CE; Leiter EH. 1999. Resistance of ALR/Lt islets to free radical-mediated diabetogenic stress is inherited as a dominant trait. Diabetes 48(11):2189-96. [PubMed: 10535453]  [MGI Ref ID J:109893]

Nadeau JH. 2003. Modifier genes and protective alleles in humans and mice. Curr Opin Genet Dev 13(3):290-5. [PubMed: 12787792]  [MGI Ref ID J:88012]

Noben-Trauth K; Latoche JR; Neely HR; Bennett B. 2010. Phenotype and genetics of progressive sensorineural hearing loss (Snhl1) in the LXS set of recombinant inbred strains of mice. PLoS One 5(7):e11459. [PubMed: 20628639]  [MGI Ref ID J:163117]

Noben-Trauth K; Zheng QY; Johnson KR. 2003. Association of cadherin 23 with polygenic inheritance and genetic modification of sensorineural hearing loss. Nat Genet 35(1):21-3. [PubMed: 12910270]  [MGI Ref ID J:86905]

Noben-Trauth K; Zheng QY; Johnson KR; Nishina PM. 1997. mdfw: a deafness susceptibility locus that interacts with deaf waddler (dfw). Genomics 44(3):266-72. [PubMed: 9325047]  [MGI Ref ID J:38429]

Perrin BJ; Sonnemann KJ; Ervasti JM. 2010. beta-actin and gamma-actin are each dispensable for auditory hair cell development but required for Stereocilia maintenance. PLoS Genet 6(10):e1001158. [PubMed: 20976199]  [MGI Ref ID J:167543]

Vazquez AE; Jimenez AM; Martin GK; Luebke AE; Lonsbury-Martin BL. 2004. Evaluating cochlear function and the effects of noise exposure in the B6.CAST+Ahl mouse with distortion product otoacoustic emissions. Hear Res 194(1-2):87-96. [PubMed: 15276680]  [MGI Ref ID J:117746]

Zheng QY; Johnson KR. 2001. Hearing loss associated with the modifier of deaf waddler (mdfw) locus corresponds with age-related hearing loss in 12 inbred strains of mice. Hear Res 154(1-2):45-53. [PubMed: 11423214]  [MGI Ref ID J:70964]

Zilberstein Y; Liberman MC; Corfas G. 2012. Inner hair cells are not required for survival of spiral ganglion neurons in the adult cochlea. J Neurosci 32(2):405-10. [PubMed: 22238076]  [MGI Ref ID J:179911]

Health & husbandry

The genotypes of the animals provided may not reflect those discussed in the strain description or the mating scheme utilized by The Jackson Laboratory prior to cryopreservation. Please inquire for possible genotypes for this specific strain.

Health & Colony Maintenance Information

Animal Health Reports

Production of mice from cryopreserved embryos or sperm occurs in a maximum barrier room, RG10/RG30.

Colony Maintenance

Breeding & Husbandry	Homozygous males do not breed well. Most homozygous females do not breed well or rear their young well.

Purchasing information

Pricing, Supply Level & Notes, Controls

General Supply Notes

• This strain is included in the Mouse Mutant Resource collection.
• Genomic DNA is available for this strain from the Mouse DNA Resource.

Control Information

	Control
	Heterozygote from the colony
	000664 C57BL/6J
Considerations for Choosing Controls
Control Pricing Information for Genetically Engineered Mutant Strains.

Important Note

The C57BL/6J background strain is homozygous for the age related hearing loss mutation Cdh23^ahl, which on this background causes progressive hearing loss with onset after 10 months of age.

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The Jackson Laboratory has rigorous genetic quality control and mutant gene genotyping programs to ensure the genetic background of JAX^® Mice strains as well as the genotypes of strains with identified molecular mutations. JAX^® Mice strains are only made available to researchers after meeting our standards. However, the phenotype of each strain may not be fully characterized and/or captured in the strain data sheets. Therefore, we cannot guarantee a strain's phenotype will meet all expectations. To ensure that JAX^® Mice will meet the needs of individual research projects or when requesting a strain that is new to your research, we suggest ordering and performing tests on a small number of mice to determine suitability for your particular project.

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