These SOD1-G93A (also called G93A-SOD1) transgenic mice may be useful in studying neuromuscular disorders, including Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's Disease).
Catherine Kunst, University of DenverRead More +
Male mice hemizygous for this SOD1-G93A (also called G93A-SOD1) transgene are viable and fertile, with transgenic expression of a G93A mutant form of human SOD1, superoxide dismutase 1, soluble. This founder line (often referred to as G1H) is reported to have high transgene copy number. The Donating Investigator reports that female hemizygous mice are sterile. Hemizygotes exhibit a phenotype similar to amyotrophic lateral sclerosis (ALS) in humans; becoming paralyzed in one or more limbs with paralysis due to loss of motor neurons from the spinal cord. Transgenic mice have an abbreviated life span: on a congenic C57BL/6J background, 50% survive at 157.1+/-9.3 days (in contrast to the mixed B6SJL background where 50% survival is observed at 128.9+/-9.1 days). The Donating Investigator reports that mice carrying this transgene on the congenic FVB/NJ background can die as early as 100 days of age.
In an attempt to offer alleles on well-characterized or multiple genetic backgrounds, alleles are frequently moved to a genetic background different from that on which an allele was first characterized. As the SOD1-G93A transgenic mice were originally created on a mixed genetic background, it should be noted that the phenotype of the congenic mice could vary from that originally described. We will modify the strain description if necessary as published results become available.
The SOD1-G93A (or G93A-SOD1) transgene was designed with a mutant human SOD1 gene (harboring a single amino acid substitution of glycine to alanine at codon 93) driven by its endogenous human SOD1 promoter. This transgene was injected into fertilized B6SJLF1 mouse eggs and founder animals were obtained. The mice were backcrossed to FVB/NJ (Stock No. 001800) for 15 generations. During backcrossing, the Y chromosome was not fixed to the FVB/NJ genetic background. Upon arrival, mice were crossed to FVB/NJ for at least 1 generation to establish the colony.
|Expressed Gene||SOD1, superoxide dismutase 1, soluble, human|
|Site of Expression|
|Allele Name||transgene insertion 1, Mark E Gurney|
|Allele Type||Transgenic (Humanized sequence, Inserted expressed sequence)|
|Allele Synonym(s)||(G93A)Tg+; G1H; G93A; G93A SOD1; G93A+; G93A-SOD1; G93AGurdl; Gur1-G93A; SOD1 G93A; SOD1 Tg; SOD1G93A; Tg(G93A-SOD1)1Gur; Tg(SOD1-G93A)1Gur; TgN(SOD1-G93A)1Gur; TgN[SOD1-G93A]1Gur; hSOD1G93A|
|Gene Symbol and Name||Tg(SOD1*G93A)1Gur, transgene insertion 1, Mark E Gurney|
|Gene Synonym(s)||(G93A)Tg+; G1H; G93A; G93A SOD1; G93A+; G93A-SOD1; SOD1 G93A; SOD1 Tg; SOD1G93A; Tg(G93A-SOD1)1Gur; Tg(SOD1-G93A)1Gur; Tg(SOD1-G93A)1Gur; TgN(SOD1-G93A)1Gur; TgN[SOD1-G93A]1Gur; hSOD1G93A|
|Promoter||SOD1, superoxide dismutase 1, soluble, human|
|Expressed Gene||SOD1, superoxide dismutase 1, soluble, human|
|Strain of Origin||(C57BL/6 x SJL)F1|
|General Note||This line, G1H, was derived from the original G1 line (now designated Tg(SOD1*G93A)2Gur) reported in J:32665. |
Transgenic mice on a background that involves C57BL/6 and SJL express high levels of the transgene with a 4-fold increase in SOD activity, and exhibit a phenotype similar to amyotrophic lateral sclerosis (ALS) in humans. Hemizygous transgenic mice become paralyzed in one or more limbs and have a life span of approximately 19-23 weeks. Paralysis is due to loss of motor neurons from the spinal cord.
|Molecular Note||This transgenic subline (designated G1H in J:76718) is derived from the G1 parental transgenic line (originally described in J:32665). This line carries a 40% expansion in transgene copy number compared to the original G1 line (described in J:32665, in MGI as Tg(SOD1*G93A)2Gur). The transgene construct is composed of the human SOD1 gene carrying a glycine to alanine transition at position 93 (G93A). The G93A mutation does not alter the activity of the protein. This line carries a high copy number.|
|Mutations Made By|| |
Dr. Mark Gurney, Tetra Discovery Partners
When maintaining the live congenic colony, hemizygous carriers (preferably males) are bred with FVB/NJ inbred mice. Female hemizygotes are poor breeders, and rarely produce more than one litter before the onset of disease. The Donating Investigator reports that mice carrying this transgene on the congenic FVB/NJ background can die as early as 100 days of age.
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