C57L/J mice are used widely in research as a general purpose strain. Mice have a high incidence of Hodgkin's-like reticulum cell neoplasm at 18 months of age and pituitary tumors in old multiparous females. C57L/J mice are highly susceptible to experimental allergic encephalomyelitis and highly responsive to phytohemagglutinin. In addition, C57L/J mice are highly susceptible to developing atherosclerotic aortic lesions following 14 weeks on an atherogenic diet. On a lithogenic diet, C57L/J mice develop gallstones as a result of abnormal regulation of cholesterol synthesis.Read More +
This strain is homozygous for Cdh23ahl, the age related hearing loss 1 mutation, which on this background results in progressive hearing loss with onset prior to three months of age.
C57L/J mice are used widely in research as a general purpose strain. Mice have a high incidence of Hodgkin's-like reticulum cell neoplasm at 18 months of age and pituitary tumors in old multiparous females. C57L/J mice are highly susceptible to experimental allergic encephalomyelitis (EAE) and highly responsive to phytohemagglutinin. In addition, C57L/J mice are highly susceptible to developing atherosclerotic aortic lesions (4500 to 8000 um2 atherosclerotic aortic lesions/aortic cross-section) following 14 weeks on an atherogenic diet (1.25% cholesterol, 0.5% cholic acid and 15% fat) (Paigen et al. 1990). On a lithogenic diet, C57L/J mice develop gallstones as a result of abnormal regulation of cholesterol synthesis (Xua et al. 2004). C57L/J mice carry no detectable endogenous ecotropic MuLV DNA sequences.
C57L/J mice were inbred following a mutation in a now extinct substrain of C57BR at F22. Inbreeding was carried out by J Murray at The Jackson Laboratory beginning in 1933. They were transferred to the production facility in 1947 at F45. The current generation of inbreeding is F203+.
|Allele Name||b-1 variant|
|Allele Type||Not Applicable (Not Applicable)|
|Allele Synonym(s)||Ah; Ahb-1; Ahb; Ahhi; Ahrb; In|
|Gene Symbol and Name||Ahr, aryl-hydrocarbon receptor|
|Gene Synonym(s)||Ah; Ahh; Ahre; In; aromatic hydrocarbon responsiveness; aryl hydrocarbon hydroxylase; bHLHe76; dioxin receptor; inflammatory reactivity|
|Strain of Origin||C57BL/6J|
|General Note||C57BL/6 carries the responsive Ahrb allele; DBA/2 carries nonresponsive Ahrd. Heterozygotes (Ahrb/Ahrd) are responsive (J:5282). Later work identified a second (J:8895) and later a third (J:22144) allele conferring response. Thus the allele in C57, C58, and MA/My strains is now Ahrb-1; Ahrb-2 is carried by BALB/cBy, A, and C3H; and Ahrb-3 by Mus spretus, M. caroli, and MOLF/Ei. The nonresponsive strains AKR, DBA/2, and 129 carry Ahrd (J:22144). Nucleotide and amino acid sequence differences between Ahrb-1 and Ahrd have been determined (J:17460). |
Strain of origin - this allele was found in C57BL/6, C58/J, C57BR, MA/My strains
|Molecular Note||This allele encodes a high affinity, relatively heat stabile, 95 kDa receptor. PCR sequencing of cDNA revealed ten nucleotide differences between the coding sequences of the DBA/2J and C57BL/6J receptors. Five of the ten differences would cause amino acid changes. One of these, a C to T transition in exon 11 would change the arginine codon in the DBA/2J allele to an opal termination codon in the C57BL/6J allele. This change would prevent the 43 amino acid extension of mRNA translation predicted for the DBA/2J allele and account for the smaller size of the peptide produced by this allele (95 kDa vs 104 kDa for the DBA/2J allele). A second C to T transition changes a proline codon in the DBA/2J allele to leucine codon in the C57BL/6J allele, and would likely change secondary structure of the peptide and thus ligand affinity.|
|Allele Name||age related hearing loss 1|
|Allele Synonym(s)||Cdh23753A; mdfw|
|Gene Symbol and Name||Cdh23, cadherin 23 (otocadherin)|
|Gene Synonym(s)||4930542A03Rik; 4930542A03Rik; CDHR23; RIKEN cDNA 4930542A03 gene; USH1D; W; age related hearing loss 1; ahl; ahl; bob; bob; bobby; bus; bustling; mdfw; mdfw; modifier of deaf waddler; neuroscience mutagenesis facility, 112; neuroscience mutagenesis facility, 181; neuroscience mutagenesis facility, 252; nmf112; nmf112; nmf181; nmf181; nmf252; nmf252; sals; sals; salsa; v; waltzer|
|Strain of Origin||multiple strains|
|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.|
|Gene Symbol and Name||Mlph, melanophilin|
|Gene Synonym(s)||2210418F23Rik; 5031433I09Rik; AW228792; D1Wsu84e; D1Wsu84e; DNA segment, Chr 1, Wayne State University 84, expressed; SLAC2-A; Slac-2a; expressed sequence AW228792; l(1)-3Rk; l(1)-3Rk; l1Rk3; l1Rk3; leaden; lethal, Chr 1, Roderick 3; ln|
|Strain of Origin||C57BR|
|Molecular Note||This allele has a C to T transition at mRNA nucleotide position 266. This introduces a stop codon in the sequence of the normally spliced transcript and it also creates a new splice donor site in exon 2. Use of this alternative splice site yields a transcript with an in-frame 21 base pair deletion that deletes 7 amino acids from the translated protein. Northern blots failed to detect this size difference and did not find any change from normal in transcript expression level.|
|Gene Symbol and Name||Obq4, obesity QTL 4|
|Strain of Origin||C57L/J|
|General Note||Obq4 may also be consistent with an additive mode of inheritance.|
|Molecular Note||This allele confers increased adiposity in male animals compared to AKR/J, and accounts for 11.7% of the phenotypic variance in male inguinal fat pad weight (percentage).|
|Allele Name||MCF sensitive|
|Gene Symbol and Name||Rmcf, resistance to MCF virus|
|Strain of Origin||multiple strains|
|General Note|| |
This locus controls resistance and susceptibility of cells in tissue culture to infection by mink cell focus-forming murine leukemia viruses. The allele Rmcfr determines resistance and occurs in strains DBA/1, DBA/2, and CBA/Ca; the allele Rmcfs determines susceptibility and occurs in strains AKR/J, C57BL/6, BALB/c, CBA/J, NFS, NZB, 129/J, and many others. Heterozygotes are as resistant as the resistant parent or nearly so. Rmcf is different from and independent of Fv1, a locus that controls susceptibility to infection by ecotropic viruses. Rmcf is located on Chr 5 close to Hm near the centromeric end (J:7108). Rmcfr protects (AKR x CBA/Ca)F1 and (AKR x DBA/2)F1 hybrids from development of spontaneous thymic lymphomas and reduces the incidence of MCF-induced thymic lymphomas (J:7175). It also reduces susceptibility of cells of Sxvs/Sxvr mice to exogenous xenotropic viruses (J:7951). In addition, in strains susceptible to Friend virus-induced erythroleukemia, a condition thought to be due to the replication of MCF virus, Rmcfr increases resistance to the virus-induced erythroleukemia. It may cause resistance by coding for or regulating the production of an MCF-related envelope glycoprotein that blocks the receptor for MCF viruses (J:8074). This conclusion is reinforced by the findings of Buller et al. (J:8497), who showed that the Rmcfr allele contains an endogenous MCF gp70 env gene and that the Rmcfs allele, at least in some strains (C57BL/6, CBA/J, and A/WySn), contains a xenotropic gp70 env gene. Presumably the MCF gp70 inhibits exogenous MCF infection in vitro by a mechanism of viral interference.
|Molecular Note||This locus controls resistance of cells to infection by mink cell focus-forming murine leukemia viruses. The recessive s (susceptible) allele is found in AKR/J, C57BL/6, BALB/c, CBA/J, NFS, NZB and 129/J.|
|Please inquire about possible genotypes.|
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