OMIA 000685-9615 : Myasthenic syndrome, congenital, CHRNE-related in Canis lupus familiaris

In other species: cattle

Possibly relevant human trait(s) and/or gene(s)s (MIM numbers): 605809 (trait) , 616324 (trait) , 608931 (trait) , 100725 (gene)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal Recessive

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2015

Molecular basis: By sequencing two positional functional candidate genes, Rinz et al. (2015) concluded that a likely causal mutation in Jack Russell Terriers is "a single base insertion [c.633_634insC] in exon 7 of CHRNE that predicts a frameshift mutation and a premature stop codon [p.Gly212Argfs*274]".

Herder et al. (2017) investigated a litter of Heideterriers (a "nascent" breed not recognized by the FCI), in which 4 out of 11 puppies showed pronounced muscle weakness. Only one of these puppies was available for genetic analysis. Herder et al. (2017) performed whole genome sequencing and identified a homozygous single nucleotide insertion into the coding sequence of the CHRNE gene (XM_014113502.1:c.1436_1437insG). The insertion was predicted to lead to a frameshift and premature stop codon (XP_013968977.1:p.Ser479ArgfsTer14). This variant was absent from the genomes of 274 control dogs. Based on the earlier findings in Jack Russell Terriers and other species, Herder et al. (2017) concluded that "it is plausible that the CHRNE variant may have caused a myasthenia gravis-like disease in the investigated puppy."

Breeds: Heideterrier, Jack Russell Terrier.

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
CHRNE cholinergic receptor, nicotinic, epsilon (muscle) Canis lupus familiaris 5 NC_051809.1 (31801741..31815685) CHRNE Homologene, Ensembl, NCBI gene


By default, variants are sorted chronologically by year of publication, to provide a historical perspective. Readers can re-sort on any column by clicking on the column header. Click it again to sort in a descending order. To create a multiple-field sort, hold down Shift while clicking on the second, third etc relevant column headers.

WARNING! Inclusion of a variant in this table does not automatically mean that it should be used for DNA testing. Anyone contemplating the use of any of these variants for DNA testing should examine critically the relevant evidence (especially in breeds other than the breed in which the variant was first described). If it is decided to proceed, the location and orientation of the variant sequence should be checked very carefully.

Since October 2021, OMIA includes a semiautomated lift-over pipeline to facilitate updates of genomic positions to a recent reference genome position. These changes to genomic positions are not always reflected in the ‘acknowledgements’ or ‘verbal description’ fields in this table.

OMIA Variant ID Breed(s) Variant Phenotype Gene Allele Type of Variant Source of Genetic Variant Reference Sequence Chr. g. or m. c. or n. p. Verbal Description EVA ID Inferred EVA rsID Year Published PubMed ID(s) Acknowledgements
614 Jack Russell Terrier Myasthenic syndrome, congenital, due to CHRNE CHRNE insertion, small (<=20) Naturally occurring variant CanFam3.1 5 g.31705136_31705137insC c.636_637insC p.(G212Rfs*274) ENSCAFT00000083466.1; ENSCAFP00000057633.1; published as c.633_634insC, coordinates in the table updated in accordance to HGVS 3'-rule 2015 26429099
804 Heideterrier Myasthenic syndrome, congenital, due to CHRNE CHRNE insertion, small (<=20) Naturally occurring variant CanFam3.1 5 g.31707450_31707451insG c.1436_1437insG p.(S479Rfs*14) XM_014113502.1; XP_013968977.1 2017 28508416


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.
2020 Mignan, T., Targett, M., Lowrie, M. :
Classification of myasthenia gravis and congenital myasthenic syndromes in dogs and cats. J Vet Intern Med 34:1707-1717, 2020. Pubmed reference: 32668077. DOI: 10.1111/jvim.15855.
2017 Herder, V., Ciurkiewicz, M., Baumgärtner, W., Jagannathan, V., Leeb, T. :
Frame-shift variant in the CHRNE gene in a juvenile dog with suspected myasthenia gravis-like disease. Anim Genet 48:625, 2017. Pubmed reference: 28508416. DOI: 10.1111/age.12558.
2015 Rinz, C.J., Lennon, V.A., James, F., Thoreson, J.B., Tsai, K.L., Starr-Moss, A.N., Humphries, H.D., Guo, L.T., Palmer, A.C., Clark, L.A., Shelton, G.D. :
A CHRNE frameshift mutation causes congenital myasthenic syndrome in young Jack Russell Terriers. Neuromuscul Disord 25:921-7, 2015. Pubmed reference: 26429099. DOI: 10.1016/j.nmd.2015.09.005.
1984 Oda, K., Lambert, E.H., Lennon, V.A., Palmer, A.C. :
Congenital canine myasthenia gravis: I. Deficient junctional acetylcholine receptors. Muscle Nerve 7:705-16, 1984. Pubmed reference: 6543919. DOI: 10.1002/mus.880070904.
Oda, K., Lennon, V.A., Lambert, E.H., Palmer, A.C. :
Congenital canine myasthenia gravis: II. Acetylcholine receptor metabolism. Muscle Nerve 7:717-24, 1984. Pubmed reference: 6543920. DOI: 10.1002/mus.880070905.
Wallace, M.E., Palmer, A.C. :
Recessive mode of inheritance in myasthenia gravis in the Jack Russell terrier. Vet Rec 114:350, 1984. Pubmed reference: 6719791.
1978 Palmer, A.C., Goodyear, J.V. :
Congenital myasthenia in the Jack Russel Terrier (correspondence) Veterinary Record 103:433-434, 1978. Pubmed reference: 741601.
1974 Palmer, A.C., Barker, J. :
Myasthenia in the dog. Vet Rec 95:452-4, 1974. Pubmed reference: 4446286.

Edit History

  • Created by Frank Nicholas on 09 Nov 2016
  • Changed by Frank Nicholas on 09 Nov 2016
  • Changed by Tosso Leeb on 16 Jun 2017