Search Criteria: Research Area is "Sensorineural Research: Hearing Defects: Age related hearing loss, control"
| Stock Number |
Strain Name Strain Description |
Standard Supply |
| 000486 | MRL/MpJ | Level 4 |
| The MRL/MpJ mice are large but docile to the point that males rarely fight. They are the parent and control strain for for MRL/MpJ-Faslpr (Stock Nos. 000485, 006825). Despite carrying the normal Fas gene, MRL/MpJ mice also exhibit autoimmune disorders, but symptoms are manifested much later in life compared to those the MRL/MpJ-Faslpr mice. Starting at about three months of age, levels of circulating immune complexes rise greatly in the MRL-Faslpr mouse but not in the wildtype control, MRL/MpJ. Also beginning at 3 months Faslpr mice exhibit very severe poliferative glomerulonephritis, whereas in the MRL/MpJ controls usually only mild glomerular lesions are detected. MRL/MpJ inbred female typically die at 73 weeks of age and males die at 93 weeks. This compares to a lifespan of 17 weeks in the female and 22 weeks for males in the mouse homozygous for Faslpr. See MRL/MpJ-Faslpr<> ..... For more information please see the full phenotype on the strain data sheet | ||
| 000661 | C3H/HeSnJ | Repository- Live |
| 000674 | I/LnJ | Repository- Live |
| I/LnJ mice were originally derived by Dr. LC Strong in 1926 from an unpedigreed stock of mice. A high proportion of mice from this strain lack a corpus callosum. This absence is associated with slow growth of the medial septum subadjacent to the cavum septi. I/LnJ mice are resistant to mmtv induced mammary tumor development and generate neutralizing antibodies to mmtv and MuLv virions that effectively block viral transmission. Due to a frameshift mutation in alpha 1 phosphorylase kinase these mice have increased glycogen content in resting skeletal muscle. The reproductive performance of I/LnJ mice is very poor. Further analysis indicates that oocytes from I/LnJ mice display retarded kinetics of meiotic maturation and a high frequency of metaphase I arrest. Some oocytes fail to resume meiosis. Oocytes have many very small centrosomes with an absence of microtubules. I/LnJ mice, in addition to carrying several other coat color alleles, are homozygous for the piebald mutation (Ednrb<> ..... For more information please see the full phenotype on the strain data sheet | ||
| 000933 | YBR/EiJ | Cryopreserved - Ready for recovery |
| 002756 | B6.CAST-Cdh23Ahl+/Kjn | Research Strain |
| C57BL/6 mice develop severe and progressive late-onset hearing loss. Histopathological changes associated with age-related hearing loss includes the disruption of both outer and inner hair cells. C57BL/6 mice are also more susceptible to noise-induced hearing loss. Age related hearing loss 1 (Ahl), a major gene responsible for this hearing loss, was mapped in an intersubspecific backcross by measuring elevated auditory-evoked brainstem response (ABR) thresholds. Ahl is located on Chromosome 10 near marker D10Mit5. B6.CAST- +Ahl is a congenic strain that carries the wildtype allele of Ahl producing C57BL/6 mice that are not susceptible to age related hearing loss. | ||
| 012438 | D2.B6-Fscn2+/Kjn | Research Strain |
| This congenic expresses the C57BL/6J derived sequence of Fscn2, rather than the Fscn2ahl8 sequence, and has a resulting amelioration of the early onset hearing loss characteristic in DBA/2J mice. Distinct from the DBA/2J host background these congenic mice have click, 8 kHz, and 16 kHz ABR thresholds at 2 months of age that are equivalent to those of C57BL/6J, although the 32 kHz thresholds are elevated similar to those of DBA/2J. This congenic rescue is similar to that found in the transgenic rescue in DBA/2J-Tg(RP24-180N9)2Kjn/Kjn (stock #012440). | ||
| 012440 | DBA/2J-Tg(RP24-180N9)2Kjn/Kjn | Research Strain |
| The Tg(RP24-180N9)2Kjn transgene gives expression of Fscn2 and rescues the Fscn2ahl8 related early onset hearing loss on the DBA/2J background. At one month of age the 16 kHz ABR threshold of the hemizygote is close to that of DBA/2NCrl controls, a subline that does not have Fscn2ahl8. This transgenic rescue is similar to that found in the congenic rescue in D2.B6-Fscn2+/Kjn (stock #012438). | ||
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