SPRET/EiJ

Stock number: 001146
Research areas: Immunology, Inflammation and Autoimmunity Research, Metabolism Research, Reproductive Biology Research, Research Tools

Description

The wild-derived inbred strain SPRET/Ei is often used in crosses with common inbred strains to create highly polymorphic panels for genetic mapping. SPRET/Ei may be useful for studies relating to inflammatory disorders.

Detailed description

The wild-derived inbred strain SPRET/Ei is often used in crosses with common inbred strains to create highly polymorphic panels for genetic mapping. SPRET/Ei mice are resistant to high doses of tumor necrosis factor alpha (TNFa) (Staelens et al 2002). Mice from a C57BL/6 x SPRET/Ei F1 cross were protected from TNFa-induced arthritis and partially protected against induced allergic asthma (Staelens et al 2004). SPRET/Ei may be useful in understanding certain inflammatory diseases.

As with many other wild-derived strains, this strain is extremely sensitive to noise, vibration and any change in environment. Breeding slumps are frequent and the use of foster mothers is often necessary to sustain a litter. In an effort to expand this strain from a recent severe breeding depression the diet was changed to a 10% fat grain. Subsequent to the use of the high fat diet some mice of this strain are found to develop large fat deposits on their neck and some develop long toenails as they age.

In 2019-2020, researchers at The Jackson Laboratory discovered this inbred strain contains the Trem2^S148E allele - a naturally occurring variant at position 48351151-48351152 on Chr 17 (rs108080490 and rs107649577; Ensembl GRCm38.p6). This TC to GA transition results in a serine to glutamic acid substitution at amino acid 148 (S148E).

Development

SPRET was derived from wild mice trapped by RD Sage in 1978 in Puerto Real, Cadiz Province, Spain. Mice were sent to Dr Mike Potter at The National Cancer Institute who subsequently transferred mice to Dr Eva Eicher at The Jackson Laboratory in 1983.

Allele

Symbol: Ahr^b-3
Name: b-3 variant
MGI accession ID: MGI:2667538
Generation method: Not Applicable
Marker symbol: Ahr
Marker name: aryl-hydrocarbon receptor
Chromosome: 12
Strain of origin: M. spretus
Molecular note: This allele encodes a high affinity, 105 kDa receptor with slightly more heat stability than the receptor encoded by the BALB/cBy allele.
General note:

Strain of origin - this allele was found in M. caroli, M. spretus, MOLF/Ei strains

Allele

Symbol: Cox7a2l^l
Name: long
MGI accession ID: MGI:6276121
Generation method: Not Applicable
Attributes: Not Specified
Marker symbol: Cox7a2l
Marker name: cytochrome c oxidase subunit 7A2 like
Chromosome: 17
Strain of origin: multiple strains
Molecular note: This allele encodes the long isoform with 113 amino acids. It is found in 129S2/SvPasCrl, CBA/CaOlaHsd, Hsd:ICR, and NZB/OlaHsd.
General note: Querying the sequences of the Sanger Mouse Genomes Project reveals that the short allele with its 6 bp deletion exists in C57BL/6J, C57BL/10J, C57BL/6NJ, C58/J, BALB/cJ, C3H/HeH, 129S5/SvEvBrd, NZW/LacZ, and SEA/GnJ, but the long allele lacking the deletion exists in 129S1/SvImJ, A/J, AKR/J, BTBR T⁺ Itpr3^tf/J, BUB/BnJ, C3H/HeJ, C57BR/cdJ, C57L/J, CAST/EiJ, CBA/J, DBA/1J, DBA/2J, FVB/NJ, I/LnJ, KK/HiJ, LEWES/EiJ, LP/J, MOLF/EiJ, NOD/ShiLtJ, NZB/BlNJ, NZO/HlLtJ, PWK/PhJ, RF/J, SPRET/EiJ, ST/bJ, WSB/EiJ, ZALENDE/EiJ.