Affected gene: EDA
Inheritance: X-linked recessive
Mutation: CanFam3.1    X    g.54511433G>A    c.910-1G>A
OMIA link: 000543-9615

Appropriate breeds for testing: German Shepherd, Shiloh Shepherd, White Swiss Shepherd

Symptoms:
Dogs with ectodermal dysplasia are born with a hairless forehead and dorsal pelvic area, have reduced or absent sweat glands and many of the teeth are absent or malformed. If canines are present, they are thinner than normal and point outwards. Affected dogs are more susceptible to infectious lung diseases than normal dogs. Chronic nasal and ocular discharge are common, as are corneal ulcerations.

References:
Casal ML, Lewis JR, Mauldin EA, Tardivel A, Ingold K, Favre M, Paradies F, Demotz S, Gaide O, Schneider P. Significant correction of disease after postnatal administration of recombinant ectodysplasin A in canine X-linked ectodermal dysplasia. Am J Hum Genet. 2007 Nov; 81(5):1050-6. [PubMed: 17924345]
Casal ML, Mauldin EA, Ryan S, Scheidt JL, Kennedy J, Moore PF, Felsburg PJ. Vet Immunol Immunopathol. Frequent respiratory tract infections in the canine model of X-linked ectodermal dysplasia are not caused by an immune deficiency. 2005 Aug 15; 107(1-2):95-104. [PubMed: 15946744]
Casal ML, Scheidt JL, Rhodes JL, Henthorn PS, Werner P. Mutation identification in a canine model of X-linked ectodermal dysplasia. Mamm Genome. 2005 Jul; 16(7):524-31. [PubMed: 16151697]
Kowalczyk C, Dunkel N, Willen L, Casal ML, Mauldin EA, Gaide O, Tardivel A, Badic G, Etter AL, Favre M, Jefferson DM, Headon DJ, Demotz S, Schneider P. J Biol Chem. 2011 Sep 2; 286(35):30769-79. Molecular and therapeutic characterization of anti-ectodysplasin A receptor (EDAR) agonist monoclonal antibodies. [PubMed: 21730053]
Lewis JR, Reiter AM, Mauldin EA, Casal ML. Orthod Craniofac Res. 2010 Feb; 13(1):40-7. Dental abnormalities associated with X-linked hypohidrotic ectodermal dysplasia in dogs. [PubMed: 20078794]
Mauldin EA, Gaide O, Schneider P, Casal ML. Am J Med Genet A. 2009 Sep; 149A(9):2045-9. Neonatal treatment with recombinant ectodysplasin prevents respiratory disease in dogs with X-linked ectodermal dysplasia. [PubMed: 19533784]
Moura E, Cirio SM. Clinical and genetic aspects of X-linked ectodermal dysplasia in the dog -- a review including three new spontaneous cases. Vet Dermatol. 2004 Oct; 15(5):269-77. [PubMed: 15500478]