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Henker LC, Lorenzett MP, Piva MM, Wronski JG, de Andrade DGA, Borges AS, Driemeier D, Oliveira-Filho JP, Pavarini SP. Alobar holoprosencephaly in an aborted American Quarter Horse fetus. J Equine Vet Sci 2022; 112:103898. [PMID: 35150851 DOI: 10.1016/j.jevs.2022.103898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/06/2022] [Accepted: 02/07/2022] [Indexed: 11/24/2022]
Abstract
Holoprosencephaly is a central nervous system malformation, characterized by incomplete or total lack of division of prosencephalon hemispheres, which is commonly accompanied by craniofacial malformations. A 9-month-gestation aborted American Quarter Horse fetus was submitted for postmortem examination. The fetus lacked haircoat and had severe facial malformations including marked shortening/absence of the maxillary, incisive and nasal bones, bilateral anophthalmia, and pre-maxillary agenesis. The prosencephalon was small and nearly spherical, represented by a single lobe, with no visible separation between cerebral hemispheres. The olfactory bulbs, piriform lobes, and the optic chiasm were absent. At cross-sectioning of the prosencephalon, the inner structures of the brain were completely absent, and replaced by a monoventricle lined by the remaining compressed cortex, and the thalami were fused. Since mutations in the sonic hedgehog (SHH) gene have been associated with human holoprosencephaly, the three coding SHH exons were sequenced using liver DNA of the aborted foal. The obtained SHH sequence was similar to the Equus caballus SHH mRNA sequence deposited in GenbankTM (XM_023640069.1); therefore, no polymorphism in the coding region of this gene justifying the phenotype was observed. This is the first report of alobar holoprosencephaly in horses.
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Affiliation(s)
- Luan Cleber Henker
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS 91540-000, Brazil.
| | - Marina Paula Lorenzett
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS 91540-000, Brazil
| | - Manoela Marchezan Piva
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS 91540-000, Brazil
| | - Júlia Gabriela Wronski
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS 91540-000, Brazil
| | - Danilo Giorgi Abranches de Andrade
- São Paulo State University (Unesp), School of Veterinary Medicine and Animal Science, Department of Veterinary Clinical Science,18618-681 Botucatu, Brazil
| | - Alexandre Secorun Borges
- São Paulo State University (Unesp), School of Veterinary Medicine and Animal Science, Department of Veterinary Clinical Science,18618-681 Botucatu, Brazil
| | - David Driemeier
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS 91540-000, Brazil
| | - José Paes Oliveira-Filho
- São Paulo State University (Unesp), School of Veterinary Medicine and Animal Science, Department of Veterinary Clinical Science,18618-681 Botucatu, Brazil
| | - Saulo Petinatti Pavarini
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS 91540-000, Brazil
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Busa T, Panait N, Chaumoitre K, Philip N, Missirian C. Esophageal atresia with tracheoesophageal fistula in a patient with 7q35-36.3 deletion including SHH gene. Eur J Med Genet 2016; 59:546-8. [PMID: 27614115 DOI: 10.1016/j.ejmg.2016.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 09/04/2016] [Indexed: 11/28/2022]
Abstract
Terminal 7q deletion is rarely reported in the literature. Holoprosencephaly and sacral dysgenesis are found in association with this deletion, due to haploinsufficiency of SHH and HLBX9 genes respectively. We report on a 2-year-old boy with 7q35-36.3 deletion encompassing SHH identified by oligonucleotide array comparative genomic hybridization. In addition to other frequent features, the patient presented with esophageal atresia and tracheoeosophageal fistula diagnosed at birth. This case, together with two others previously described, one presenting with esophageal atresia, the other with congenital esophageal stenosis, confirms the possible association between congenital esophageal malformations and 7q terminal deletion including SHH.
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Affiliation(s)
- Tiffany Busa
- Unité de génétique clinique, APHM, CHU Timone-Enfants, France.
| | | | | | - Nicole Philip
- Unité de génétique clinique, APHM, CHU Timone-Enfants, France
| | - Chantal Missirian
- Unité de cytogénétique constitutionnelle, APHM, CHU Timone-Enfants, France
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