4.1 Article

A Hypohidrotic Ectodermal Dysplasia Arising From a New Mutation in a Yorkshire Terrier Dog

Journal

TOPICS IN COMPANION ANIMAL MEDICINE
Volume 39, Issue -, Pages -

Publisher

W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.tcam.2020.100404

Keywords

Bayesian inference; dog; new mutation; skin genetic disorders

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Hypohidrotic ectodermal dysplasias (HED) constitute a group of genetic disorders that affect ectodermal derivatives such as sweat glands, sebaceous glands, hair, and teeth. The vast majority of cases of HED are caused by a recessive mutation of the EDA gene located in the X chromosome. In these cases, affected individuals are usually male and have alopecia and hypotrichosis with characteristic distribution, in addition to malformed teeth and fewer than normal. From a canine HED isolated case (proband) andc in order to verify if this emerged from a new mutation, it was possible to construct a pedigree with 5 generations and 93 individuals representing an extended and informative family. The proband's mother crossed with 2 different males and generated 33 descendants in 9 gestations: 1 affected male (proband), 15 normal males, and 17 normal females, which together can be considered as 1 sibship. Through Bayesian inference, it was possible to establish that this case originated from a new mutation, with a 99.99% probability of the mother of the proband not being a carrier. (C) 2020 Elsevier Inc. All rights reserved.

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