Mice that are homozygous for the targeted mutation are viable, normal in size and do not display any gross physical or behavioral abnormalities. No gene product (mRNA) was detected. Homozygous mutant mice have elevated systolic, diastolic and mean blood pressure when compared to wildtype. Heterozygous mutant mice display systolic, diastolic and mean blood pressure that are slightly elevated above wildtype levels. Blood pressure in mutant mice remains elevated independent of salt content in diet. Infusion treatment of atrial natriuretic peptide in mutant mice does not result in the increased urine output or sodium excretion response seen in wildtype mice. Plasma volume expansion to release natriuretic/diuretic factors from the heart fails to induce increased urine output, sodium excretion and cyclic GMP excretion in the mutant. The same plasma volume expansion in wildtype mice results in a 12-fold increase in urine output, a 6-fold increase in sodium excretion and a 4-fold increase in cyclic GMP excretion in the urine. Mutant mice excrete only 30% of the normal level of urinary cyclic GMP. The Donating Investigator reports this mutant strain also exhibits cardiac hypertrophy and cardiac fibrosis. The phenotype of this mutant strain, salt insensitive hypertension, resembles that of half of all human patients with essential hypertension. This mutant mouse strain represents a model that may be useful in studies related to essential hypertension.
A targeting vector containing neomycin resistance and herpes simplex virus thymidine kinase genes was used to disrupt exon 4 of the targeted gene. The construct was electroporated into 129S7/SvEvBrd-Hprt+ derived AB-1 embryonic stem (ES) cells. Correctly targeted ES cells were injected into C57BL/6 blastocysts.
|Allele Name||targeted mutation 1, David L Garbers|
|Allele Type||Targeted (Null/Knockout)|
|Allele Synonym(s)||GC-A KO; GC-A-|
|Gene Symbol and Name||Npr1, natriuretic peptide receptor 1|
|Gene Synonym(s)||AI893888; ANPRA; ANPa; Anpra; GC-A; GUC2A; GUCY2A; Gca; NPR-A; NPRA; Npra; Pndr; expressed sequence AI893888; guanylyl cyclase-A|
|Strain of Origin||129S7/SvEvBrd-Hprt<+>|
|Molecular Note||Insertion of a neomycin resistance cassette into exon 4, which encodes part of the extra-cellular putative ligand-binding domain, disrupted the gene. Stable, wild-type size transcript was not detected in liver or kidney from homozygous mutant mice.|
|Mutations Made By|| |
David Garbers, U.T. Southwestern Medical Center
This strain originated on a 129S7 background and is maintained on the 129S6/SvEvTac background as a heterozygote.
When using the GC-A KO mouse strain in a publication, please cite the originating article(s) and include JAX stock #004374 in your Materials and Methods section.
|Heterozygous or wildtype for Npr1<tm1Gar>|
The average number of mice provided from recovery of our cryopreserved strains is 10. The total number of animals provided,
their gender and genotype will vary. We will fulfill your order by providing at least two pair of mice, at least one animal of
each pair carrying the mutation of interest. Please inquire if larger numbers of animals with specific genotype and genders
are needed. Animals typically ship between 10 and 14 weeks from the date of your order. If a second cryorecovery is needed in
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The genotypes of animals provided may not reflect the mating scheme utilized by The Jackson Laboratory prior to cryopreservation, or that discussed in the strain description. Please inquire about possible genotypes which will be recovered for this specific strain. The Jackson Laboratory cannot guarantee the reproductive success of mice shipped to your facility. If the mice are lost after the first three days (post-arrival) or do not produce progeny at your facility, a new order and fee will be necessary.
Cryorecovery to establish a Dedicated Supply for greater quantities of mice. Mice recovered can be used to establish a dedicated colony to contractually supply you mice according to your requirements. Price by quotation.
|Frozen Mouse Embryo||$2,595.00 per straw or vial|
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