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Il4ppqNZB/Slc
QTL Variant Detail
Summary
QTL variant: Il4ppqNZB/Slc
Name: IL-4 producing potential QTL; NZB/Slc
MGI ID: MGI:3702121
QTL: Il4ppq  Location: Chr7:124513662-128819324 bp  Genetic Position: Chr7, cM position of peak correlated region/allele: 68.16 cM
QTL Note: genome coordinates based on the boundaries of the QTL region
Variant
origin
Strain of Specimen:  NZB/NSlc
Variant
description
Allele Type:    QTL
Mutation:    Undefined
    This allele confers decreased IL-4 producing potential in splenic T-cells compared to NZW/Slc. (J:117863)
Phenotypes
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View phenotypes and curated references for all genotypes (concatenated display).
Notes

Mapping and Phenotype information for this QTL, its variants and associated markers

J:117863

Linkage analysis was performed to identify QTL associated with IL-4 producing potential in anti-CD3 mAb-stimulated spleen cells from 142 (NZB/Slc x NZW/Slc)F1 x NZW/Slc backcross mice at 2 months of age. Parental strain NZB/Slc is susceptible to systemiclupus erythematosus (SLE) and displays limited IL-4 potential whereas parental strain NZW/Slc is SLE-resistant and displays high IL-4 potential. Genome scan was performed using 117 polymorphic genetic markers.

Significant linkage to IL-4 potential mapped to mouse Chromosome 7 between D7Mit255 (61 cM) and D7Mit103 (63.5 cM) with LOD=4.3. This locus is named Il4ppq (IL-4 producing potential QTL) and maps near the Il4ra gene at 62 cM. Animals heterozygous at Il4ppq display significantly decreased IL-4 production compared to animals homozygous for NZW/Slc-derived alleles at Il4ppq. This locus is also associated with positive proteinuria in a NZW/Slc x (NZW/Slc x BXSB)F1 backcross population. In fact, backcross animals heterozygous for NZW/Slc and BXSB alleles at Il4ppa/Il4ra display significantly increased incidence of proteinuria after 4 months of age.

Since Il4ra is an obvious candidate gene, sequence analysis revealed 17 coding region nucleotide substitutions between NZB/Slc and NZW/Slc. NZB/Slc and BXSB (another SLE-susceptible strain with limited IL-4 potential) have the same Il4ra sequence as C57BL/6J except for a single nucleotide change at position 954, and NZW/Slc has the same Il4ra sequence as BALB/c.

References
Original:  J:117863 Shiroiwa W, et al., IL-4R{alpha} polymorphism in regulation of IL-4 synthesis by T cells: implication in susceptibility to a subset of murine lupus. Int Immunol. 2007 Feb;19(2):175-83
All:  1 reference(s)

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
10/22/2024
MGI 6.24
The Jackson Laboratory