scholarly journals X-Linked Hypohidrotic Ectodermal Dysplasia in Crossbred Beef Cattle Due to a Large Deletion in EDA

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 657 ◽  
Author(s):  
Donal O’Toole ◽  
Irene M. Häfliger ◽  
Fabienne Leuthard ◽  
Brant Schumaker ◽  
Lynn Steadman ◽  
...  
Keyword(s):  
Ectodermal Dysplasia ◽  
Severe Pneumonia ◽  
Large Deletion ◽  
Hair Follicles ◽  
Enamel Organ ◽  
Hypohidrotic Ectodermal Dysplasia ◽  
Mandibular Incisor ◽  
Base Pair Deletion ◽  
Red Angus ◽  
Mucosal Glands

X-linked hypohidrotic ectodermal dysplasia-1 (ECTD1) in people results in a spectrum of abnormalities, most importantly hypotrichosis, anodontia/oligodontia, and absent or defective ectodermally derived glands. Five Red Angus-Simmental calves born over a 6-year period demonstrated severe hypotrichosis and were diagnosed as affected with ECTD1-like syndrome. Two died of severe pneumonia within a week of birth. The skin of three affected calves revealed a predominance of histologically unremarkable small-caliber hair follicles. Larger follicles (>50 µm) containing medullated hairs (including guard and tactile hairs) were largely restricted to the muzzle, chin, tail, eyelids, tragus and distal portions of the limbs and tail. The mean histological density of hair follicles in flank skin of two affected calves was slightly greater than that in two unaffected calves. One affected calf was examined postmortem at 10 days of age to better characterize systemic lesions. Nasolabial, intranasal and tracheobronchial mucosal glands were absent, whereas olfactory glands were unaffected. Mandibular incisor teeth were absent. Premolar teeth were unerupted and widely spaced. Other than oligodontia, histological changes in teeth were modest, featuring multifocal disorganization of ameloblasts, new bone formation in dental alveoli, and small aggregates of osteodentin and cementum at the margins of the enamel organ. A 52,780 base pair deletion spanning six out of eight coding exons of EDA and all of AWAT2 was identified. Partial deletion of the EDA gene is the presumed basis for the reported X-chromosomal recessive inherited genodermatosis.

scholarly journals Α de novo 3.8-Mb inversion affecting the EDA and XIST genes in a heterozygous female calf with generalized hypohidrotic ectodermal dysplasia

BMC Genomics ◽  
2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Clémentine Escouflaire ◽  
Emmanuelle Rebours ◽  
Mathieu Charles ◽  
Sébastien Orellana ◽  
Margarita Cano ◽  
...  
Keyword(s):  
Ectodermal Dysplasia ◽  
De Novo ◽  
Genetic Disorder ◽  
Hair Follicles ◽  
Whole Genome Sequencing Data ◽  
Recessive Mutation ◽  
Sources Of Information ◽  
Affected Animal ◽  
Sequencing Data ◽  
Hypohidrotic Ectodermal Dysplasia

Abstract Background In mammals, hypohidrotic ectodermal dysplasia (HED) is a genetic disorder that is characterized by sparse hair, tooth abnormalities, and defects in cutaneous glands. Only four genes, EDA, EDAR, EDARADD and WNT10A account for more than 90% of HED cases, and EDA, on chromosome X, is involved in 50% of the cases. In this study, we explored an isolated case of a female Holstein calf with symptoms similar to HED. Results Clinical examination confirmed the diagnosis. The affected female showed homogeneous hypotrichosis and oligodontia as previously observed in bovine EDAR homozygous and EDA hemizygous mutants. Under light microscopy, the hair follicles were thinner and located higher in the dermis of the frontal skin in the affected animal than in the control. Moreover, the affected animal showed a five-fold increase in the number of hair follicles and a four-fold decrease in the diameter of the pilary canals. Pedigree analysis revealed that the coefficient of inbreeding of the affected calf (4.58%) was not higher than the average population inbreeding coefficient (4.59%). This animal had ten ancestors in its paternal and maternal lineages. By estimating the number of affected cases that would be expected if any of these common ancestors carried a recessive mutation, we concluded that, if they existed, other cases of HED should have been reported in France, which is not the case. Therefore, we assumed that the causal mutation was dominant and de novo. By analyzing whole-genome sequencing data, we identified a large chromosomal inversion with breakpoints located in the first introns of the EDA and XIST genes. Genotyping by PCR-electrophoresis the case and its parents allowed us to demonstrate the de novo origin of this inversion. Finally, using various sources of information we present a body of evidence that supports the hypothesis that this mutation is responsible for a skewed inactivation of X, and that only the normal X can be inactivated. Conclusions In this article, we report a unique case of X-linked HED affected Holstein female calf with an assumed full inactivation of the normal X-chromosome, thus leading to a severe phenotype similar to that of hemizygous males.

Case of hypohidrotic ectodermal dysplasia caused by a large deletion mutation in theEDAgene

2013 ◽  
Vol 40 (4) ◽  
pp. 281-283 ◽  
Author(s):  
Ryota Hayashi ◽  
Muhammad Farooq ◽  
Hiroki Fujikawa ◽  
Atsushi Fujimoto ◽  
Tsuyoshi Hashimoto ◽  
...  
Keyword(s):  
Ectodermal Dysplasia ◽  
Large Deletion ◽  
Deletion Mutation ◽  
Hypohidrotic Ectodermal Dysplasia

scholarly journals Whole exome sequencing revealed a large deletion in EDAof a Vietnamese patient with hypohidrotic ectodermal dysplasia

2021 ◽  
Vol 63 (12) ◽  
pp. 1-4
Author(s):  
Phuong Anh Nguyen ◽  
◽  
Thuy Duong Nguyen ◽  
Van Hai Nong ◽  
◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Ectodermal Dysplasia ◽  
Genetic Disorder ◽  
Large Deletion ◽  
Abnormal Development ◽  
Sweat Glands ◽  
Hypohidrotic Ectodermal Dysplasia ◽  
Whole Exome ◽  
Exon 1

Hypohidrotic ectodermal dysplasia (HED) (OMIM # 305100) is a congenital genetic disorder caused by mutations in EDA (NM_001399) on chromosome X. Children with HED have the abnormal development of epidermal structures such as skin, hair, nails, teeth, and sweat glands. The present study aimed to detect mutations in EDA of a Vietnamese family with a son having only five teeth and no sweat glands, using whole exome sequencing (WES) and multiplex PCR. The results showed that patient had a deletion of exon 1 in EDA (c.2_396del), which is likely to be inherited from the healthy mother. The results will partly contribute to molecular studies on HED, helping in genetic counseling and disease treatment.

Treatment Considerations for a Patient with Hypohidrotic Ectodermal Dysplasia: A Case Report

2008 ◽  
Vol 9 (3) ◽  
pp. 128-134 ◽  
Author(s):  
Dilek Tüfekcioğlu ◽  
Chenkhan Bal ◽  
Bilge Turhan Bal
Keyword(s):  
Case Report ◽  
Behavioral Problems ◽  
Ectodermal Dysplasia ◽  
Young Patients ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Clinical Report ◽  
Hypohidrotic Ectodermal Dysplasia ◽  
Oral Rehabilitation ◽  
Treatment Considerations

Abstract Aim This clinical report describes the oral rehabilitation of a 6-year-old male ectodermal dysplasia (ED) patient diagnosed with hypodontia. Background ED is a hereditary disease characterized by a congenital dysplasia of one or more ectodermal structures and their accessory appendages. Common manifestations include defective hair follicles and eyebrows, frontal bossing with prominent supraorbital ridges, nasal bridge depression, and protuberant lips. Intraorally, most common findings are anadontia or hypodontia, conical teeth, and generalize spaces. The patient may suffer from dry skin, hyperthermia, and unexplained high fever as a result of deficiency of sweat glands. Report A six-year-old boy who exhibited many of the manifestations of ED as well as behavioral problems and a severe gag reflex. The treatment was designed to improve his appearance and oral functions and included the fabrication of several removable prostheses and acid-etched composite resin restorations during his growth and development. Summary Young patients with ED need to be evaluated early by a dental professional to determine the oral ramifications of the condition. When indicated, appropriate care needs to be rendered throughout the child's growth cycle to maintain oral functions as well as to address the esthetic needs of the patient. This clinical report demonstrates that removable partial dentures associated with direct composite restorations can be a reversible and inexpensive method of treatment for young ED patients. Citation Bal C, Bal BT, Casela L, Tüfekçioğlu D. Treatment Considerations for a Patient with Hypohidrotic Ectodermal Dysplasia: A Case Report. J Contemp Dent Pract 2008 March; (9)3:128-134.

A rare cause of fever of unknown origin: hypohidrotic ectodermal dysplasia with a splice site mutation

2018 ◽  
Vol 70 (5) ◽  
Author(s):  
Melahat M. Oguz ◽  
Meltem Akcaboy ◽  
Asuman Gurkan ◽  
Esma Altinel Acoglu ◽  
Pelin Zorlu ◽  
...  
Keyword(s):  
Splice Site ◽  
Fever Of Unknown Origin ◽  
Ectodermal Dysplasia ◽  
Splice Site Mutation ◽  
Unknown Origin ◽  
Hypohidrotic Ectodermal Dysplasia ◽  
Site Mutation

scholarly journals One Mutation of the ED1 Gene in a Chinese Han Family with X-Linked Hypohidrotic Ectodermal Dysplasia

2014 ◽  
Vol 26 (1) ◽  
pp. 111 ◽  
Author(s):  
Jing Wang ◽  
Wei-Wei Ha ◽  
Wen Wang ◽  
Hua-Yang Tang ◽  
Xian-Fa Tang ◽  
...  
Keyword(s):  
Ectodermal Dysplasia ◽  
Hypohidrotic Ectodermal Dysplasia ◽  
Chinese Han

scholarly journals First report of X-linked hypohidrotic ectodermal dysplasia with a hemizygous c.1142G > C in the EDA gene: variant of uncertain significance or new pathogenic variant?

2021 ◽  
Vol 47 (1) ◽  
Author(s):  
Mario Tumminello ◽  
Antonella Gangemi ◽  
Federico Matina ◽  
Melania Guardino ◽  
Bianca Lea Giuffrè ◽  
...  
Keyword(s):  
Ectodermal Dysplasia ◽  
Genetic Disorder ◽  
Missense Variant ◽  
Pathogenic Variant ◽  
Hypohidrotic Ectodermal Dysplasia ◽  
Variant Of Uncertain Significance ◽  
Uncertain Significance ◽  
Clinical Potential ◽  
Genomic Variant ◽  
Eda Gene

Abstract Background Hypohidrotic Ectodermal Dysplasia (HED) is a genetic disorder which affects structures of ectodermal origin. X-linked hypohidrotic ectodermal dysplasia (XLHED) is the most common form of disease. XLHED is characterized by hypotrichosis, hypohydrosis and hypodontia. The cardinal features of classic HED become obvious during childhood. Identification of a hemizygous EDA pathogenic variant in an affected male confirms the diagnosis. Case presentation We report on a male newborn with the main clinical characteristics of the X-linked HED including hypotrichosis, hypodontia and hypohidrosis. Gene panel sequencing identified a new hemizygous missense variant of uncertain significance (VUS) c.1142G > C (p.Gly381Ala) in the EDA gene, located on the X chromosome and inherited from the healthy mother. Conclusion Despite the potential functional impact of VUS remains uncharacterized, our goal is to evaluate the clinical potential consequences of missense VUS on EDA gene. Even if the proband’s phenotype is characteristic for classic HED, further reports of patients with same clinical phenotype and the same genomic variant are needed to consider this novel VUS as responsible for the development of HED.

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