20 results on '"Menzi F"'
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2. I bovini svizzeri Holstein grigi, ricci e a pelo corto presentano tracce genetiche della razza Simmental
- Author
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Hauser, M., Wolf-Hofstetter, S., Acklin-Menzi, F., Studer, E., Rediger, D., Seefried, F. R., and Drögemüller, C.
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630 Agriculture ,590 Animals (Zoology) ,570 Life sciences ,biology ,610 Medicine & health - Abstract
Vereinzelt treten in der Schweiz schwarz-weiss gescheckte Kälber auf, die im pigmentierten Bereich ein besonderes Fell aufweisen. Ansonsten sind diese Tiere normal entwickelt. Die weissen Haare sind normal, sie erscheinen jedoch verhältnismässig lang und glatt. Dagegen sind die pigmentierten Haare kraus und verkürzt. Zudem weisen die betroffenen Tiere eine variable Intensität der Fellfarbe im pigmentierten Bereich auf. Betroffene Kälber erscheinen bei Geburt eher schwarz, wobei mit zunehmendem Alter unterschiedlich aufgehellte Farben von rotbräunlich bis grau auftreten. Bei adulten Rindern erscheinen die farbigen Haare eher glatt, jedoch deutlich verkürzt. Damit verbunden ist eine sich während des Wachstums verstärkende, variable und auf den pigmentierten Bereich des Fells beschränkte Minderbehaarung. Dieses Phänomen der farbassoziierten Hypotrichose ist zuvor international in verschiedenen Fleischrinderpopulationen beschrieben worden. Diese Rinder sind oftmals einfarbig schwarz mit nur wenigen kleinen weissen Abzeichen. Auf Grund des Haarverlusts im pigmentierten Fell und insbesondere am pigmentierten Schwanz ist neben dem Begriff der kreuzungsbedingten kongenitalen Hypotrichose auch vom rat-tail syndrome gesprochen worden. Molekulargenetische Untersuchungen haben gezeigt, dass die betroffenen Tiere jeweils heterozygote Träger für zwei mit der Pigmentierung assoziierten Varianten in zwei verschiedenen Genen gewesen sind. Dieselbe Genotyp-Konstellation weisen auch die hier vorgestellten 33 ähnlich betroffenen Rinder aus der Schweiz auf. Einerseits tragen sie jeweils eine Kopie der MC1R Genvariante für die dominant vererbte schwarze Fellfarbe, sowie eine Kopie der rezessiv vererbten Rotfaktorvariante im MC1R Gen. Andererseits sind alle Fälle heterozygote Anlageträger für eine Variante im PMEL Gen, die mit einer semidominant vererbten Form der Farbverdünnung (falb) bei Simmental, Hereford und Highland Cattle assoziiert ist. Die seit Jahrzehnten praktizierte Einkreuzung der Rasse Holstein ins Original Simmental erklärt das gelegentliche Vorkommen dieses Phänomens in der Schweizer Rinderzucht., Occasionally black-and-white spotted calves appear in Switzerland, which show a special fur only in the pigmented area. Otherwise these animals are normally developed. The white hairs are normal, but they appear relatively long and smooth, because the pigmented hairs are curly and thus appear shortened. In addition, the affected animals show a variable intensity of coat colour in the pigmented area. At birth affected calves often appear black, whereas older cattle show bright colours from reddish brown to grey. This is associated with a variable hair loss that increases during growth and is limited to the pigmented area of the coat. In adult cattle the coloured hairs appear rather smooth, but they are considerably shorter. This phenomenon of pigmentation-associated hypotrichosis was previously described internationally in various beef cattle populations. The affected cattle are often solid black and show only small white spots. Therefore, the loss of hair at the pigmented fur and most visibly at the pigmented tail is called rat-tail syndrome. Another name used is also crossbreeding-related congenital hypotrichosis. Molecular genetic investigations showed that the affected animals are heterozygous carriers for two variants in two different genes associated with pigmentation. The same genotype constellation was found in the 33 similarly affected cattle from Switzerland presented here. On one hand, they each carry a copy of the MC1R gene gain-of-function variant causing dominant black, as well as a copy of the recessively inherited red factor loss-of-function variant in the MC1R gene. On the other hand, all cases are heterozygous carriers for a variant in the PMEL gene that is associated with a semi-dominantly inherited form of colour dilution (dun or silver) in Simmental, Hereford and Highland Cattle. The introgression of Holstein cattle into the Original Simmental breed, which has been practised for decades, explains the occasional occurrence of this phenomenon in Swiss cattle breeding., En Suisse, on peut parfois observer des veaux tachetés noirs et blancs présentant un pelage spécial uniquement dans la zone pigmentée des poils. Ces animaux sont normalement développés; les poils blancs sont normaux mais semblent relativement longs et lisses, alors que les poils pigmentés sont bouclés et raccourcis. En outre, les animaux atteints présentent une intensité variable de la couleur du pelage dans la zone pigmentée. À la naissance, ces veaux apparaissent souvent noirs, alors qu’en grandissant ils présentent une couleur plus claire allant du brun rougeâtre au gris. Chez les bovins adultes, les poils colorés semblent plutôt lisses mais sont nettement raccourcis. Ceci est associé à une diminution de la pilosité variable augmentant pendant la croissance et se limitant à la zone pigmentée du pelage. Ce phénomène d’hypotrichose associée à la pigmentation a déjà été décrit au niveau international dans diverses races à viande bovines. Ces bovins sont souvent d’un noir uniforme et ne présentent que de petites taches blanches. En raison de la perte de poils dans le pelage pigmenté et plus visiblement au niveau de la queue pigmentée, on appelle ce syndrome syndrome de la queue de rat (rat-tail syndrom), également appelé hypotrichose congénitale liée au croisement. Les études de génétique moléculaire ont montré que les animaux affectés sont porteurs hétérozygotes de deux variantes de deux gènes différents associés à la pigmentation. La même constellation génotypique a été retrouvée chez les 33 bovins suisses présentés ici. D’une part, ces derniers portent chacun une copie de la variante du gène dominant MC1R causant le noir, ainsi qu’une copie de la variante récessive du facteur rouge dans le gène MC1R. D’autre part, tous les cas sont porteurs hétérozygotes d’une variante du gène PMEL associée à une forme de dilution de couleur semi-dominante héréditaire (dun ou argent) chez les races Simmental, Hereford et Highland Cattle. Le croisement des bovins Holstein avec la race Simmental originale, pratiquée depuis des décennies, explique la présence occasionnelle de ce phénomène dans l’élevage bovin suisse., Di tanto in tanto, in Svizzera nascono vitelli maculati di bianco e nero, che hanno un pelo particolare solo nella zona pigmentata. Altrimenti questi animali hanno uno sviluppo normale. I peli bianchi sono normali, ma appaiono relativamente lunghi e lisci mentre i peli pigmentati sono ricci e corti. Inoltre, gli animali in questione mostrano un’intensità variabile del colore del mantello nella zona pigmentata. I vitelli coinvolti tendono ad apparire neri alla nascita, ma con l’età cambiano con vari gradi di schiarimento dal bruno rossastro al grigio. Nei bovini adulti, i peli colorati appaiono piuttosto lisci, ma notevolmente accorciati. Questo viene associato durante la crescita a un incremento della pelosità ridotta che è variabile e limitata alla zona pigmentata del mantello. Questo fenomeno di ipotricosi associata ai colori è stato già precedentemente descritto a livello internazionale in varie popolazioni di bovini da carne. Questi bovini sono spesso di colore nero monocromatico con solo poche e piccole macchie bianche. A causa della perdita dei peli del mantello pigmentato e soprattutto sulla coda pigmentata, è stato usato il termine rat-tail syndrome in aggiunta al termine ipotricosi congenita causata dall’incrocio. Studi di genetica molecolare hanno dimostrato che gli animali colpiti erano portatori eterozigoti per due varianti associate alla pigmentazione in due geni diversi. La stessa costellazione di genotipi si è rilevata anche nei 33 bovini qui presentati provenienti dalla Svizzera, che sono stati colpiti in modo molto simile. Da un lato, ognuno di essi porta una copia della variante del gene MC1R per il colore del mantello nero ereditato dominante, così come una copia della variante del fattore rosso ereditato recessivamente nel gene MC1R. D’altra parte, tutti i casi sono portatori eterozigoti per una variante del gene PMEL associata a una forma semidominante di dispersione del colore (giallo pallido) nelle razze Simmental, Hereford e Highland Cattle. L’incrocio della razza Holstein con la razza Original Simmental, praticato da decenni, spiega il verificarsi occasionale di questo fenomeno nell’allevamento bovino svizzero.
- Published
- 2020
3. Grey, curly and short-haired Swiss Holstein cattle show genetic traces of the Simmental breed
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Hauser, M, primary, Wolf-Hofstetter, S, additional, Acklin-Menzi, F, additional, Studer, E, additional, Rediger, D, additional, Seefried, F, additional, and Drögemüller, C, additional
- Published
- 2020
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4. Graue, kraus- und kurzhaarige Schweizer Holstein Rinder weisen genetische Spuren der Rasse Simmental auf.
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Hauser, M., Wolf-Hofstetter, S., Acklin-Menzi, F., Studer, E., Rediger, D., Seefried, F. R., and Drögemüller, C.
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- 2020
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5. 1084 Cholesterol deficiency associated APOB mutation affects lipid metabolism in Holstein cattle
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Gross, J. J., primary, Schwinn, A. C., additional, Schmitz-Hsu, F., additional, Menzi, F., additional, Drögemüller, C., additional, Albrecht, C., additional, and Bruckmaier, R. M., additional
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- 2016
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6. Genetic diversity analyses reveal first insights into breed-specific selection signatures within Swiss goat breeds
- Author
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Burren, A., primary, Neuditschko, M., additional, Signer-Hasler, H., additional, Frischknecht, M., additional, Reber, I., additional, Menzi, F., additional, Drögemüller, C., additional, and Flury, C., additional
- Published
- 2016
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7. Clinicopathological Phenotype of Autosomal Recessive Cholesterol Deficiency in Holstein Cattle
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Mock, T., primary, Mehinagic, K., additional, Menzi, F., additional, Studer, E., additional, Oevermann, A., additional, Stoffel, M.H., additional, Drögemüller, C., additional, Meylan, M., additional, and Regenscheit, N., additional
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- 2016
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8. Rapid Communication: Cholesterol deficiency–associated APOB mutation impacts lipid metabolism in Holstein calves and breeding bulls1
- Author
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Gross, J. J., primary, Schwinn, A.-C., additional, Schmitz-Hsu, F., additional, Menzi, F., additional, Drögemüller, C., additional, Albrecht, C., additional, and Bruckmaier, R. M., additional
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- 2016
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9. A transposable element insertion inAPOBcauses cholesterol deficiency in Holstein cattle
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Menzi, F., primary, Besuchet‐Schmutz, N., additional, Fragnière, M., additional, Hofstetter, S., additional, Jagannathan, V., additional, Mock, T., additional, Raemy, A., additional, Studer, E., additional, Mehinagic, K., additional, Regenscheit, N., additional, Meylan, M., additional, Schmitz‐Hsu, F., additional, and Drögemüller, C., additional
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- 2016
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10. Die Wirkungsweise der Empfangsröhren
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Menzi, F.
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- 1931
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11. Die Wirkungsweise der Empfangsröhren [Schluss]
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Menzi, F.
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- 1931
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12. Streckenflug und Funk
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Menzi, F.
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- 1949
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13. Verbesserte Übertragungsqualität für Kurzwellen-Telephonieverbindungen
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Menzi, F.
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- 1969
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14. Analysis of Polycerate Mutants Reveals the Evolutionary Co-option of HOXD1 for Horn Patterning in Bovidae.
- Author
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Allais-Bonnet A, Hintermann A, Deloche MC, Cornette R, Bardou P, Naval-Sanchez M, Pinton A, Haruda A, Grohs C, Zakany J, Bigi D, Medugorac I, Putelat O, Greyvenstein O, Hadfield T, Jemaa SB, Bunevski G, Menzi F, Hirter N, Paris JM, Hedges J, Palhiere I, Rupp R, Lenstra JA, Gidney L, Lesur J, Schafberg R, Stache M, Wandhammer MD, Arbogast RM, Guintard C, Blin A, Boukadiri A, Rivière J, Esquerré D, Donnadieu C, Danchin-Burge C, Reich CM, Riley DG, Marle-Koster EV, Cockett N, Hayes BJ, Drögemüller C, Kijas J, Pailhoux E, Tosser-Klopp G, Duboule D, and Capitan A
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- Animals, Biometry, Gene Expression Regulation, Developmental, Goats embryology, Goats metabolism, Homeodomain Proteins metabolism, Male, Mice, Transgenic, Mutation, Sheep embryology, Sheep metabolism, Biological Evolution, Goats genetics, Homeodomain Proteins genetics, Horns, Sheep genetics
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In the course of evolution, pecorans (i.e., higher ruminants) developed a remarkable diversity of osseous cranial appendages, collectively referred to as "headgear," which likely share the same origin and genetic basis. However, the nature and function of the genetic determinants underlying their number and position remain elusive. Jacob and other rare populations of sheep and goats are characterized by polyceraty, the presence of more than two horns. Here, we characterize distinct POLYCERATE alleles in each species, both associated with defective HOXD1 function. We show that haploinsufficiency at this locus results in the splitting of horn bud primordia, likely following the abnormal extension of an initial morphogenetic field. These results highlight the key role played by this gene in headgear patterning and illustrate the evolutionary co-option of a gene involved in the early development of bilateria to properly fix the position and number of these distinctive organs of Bovidae., (© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.)
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- 2021
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15. [Grey, curly and short-haired Swiss Holstein cattle show genetic traces of the Simmental breed].
- Author
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Hauser M, Wolf-Hofstetter S, Acklin-Menzi F, Studer E, Rediger D, Seefried F, and Drögemüller C
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- Animals, Cattle, Switzerland, Breeding, Hair Color genetics, Pigmentation genetics
- Abstract
Introduction: Occasionally black-and-white spotted calves appear in Switzerland, which show a special fur only in the pigmented area. Otherwise these animals are normally developed. The white hairs are normal, but they appear relatively long and smooth, because the pigmented hairs are curly and thus appear shortened. In addition, the affected animals show a variable intensity of coat colour in the pigmented area. At birth affected calves often appear black, whereas older cattle show bright colours from reddish brown to grey. This is associated with a variable hair loss that increases during growth and is limited to the pigmented area of the coat. In adult cattle the coloured hairs appear rather smooth, but they are considerably shorter. This phenomenon of pigmentation-associated hypotrichosis was previously described internationally in various beef cattle populations. The affected cattle are often solid black and show only small white spots. Therefore, the loss of hair at the pigmented fur and most visibly at the pigmented tail is called rat-tail syndrome. Another name used is also crossbreeding-related congenital hypotrichosis. Molecular genetic investigations showed that the affected animals are heterozygous carriers for two variants in two different genes associated with pigmentation. The same genotype constellation was found in the 33 similarly affected cattle from Switzerland presented here. On one hand, they each carry a copy of the MC1R gene gain-of-function variant causing dominant black, as well as a copy of the recessively inherited red factor loss-of-function variant in the MC1R gene. On the other hand, all cases are heterozygous carriers for a variant in the PMEL gene that is associated with a semi-dominantly inherited form of colour dilution (dun or silver) in Simmental, Hereford and Highland Cattle. The introgression of Holstein cattle into the Original Simmental breed, which has been practised for decades, explains the occasional occurrence of this phenomenon in Swiss cattle breeding.
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- 2020
- Full Text
- View/download PDF
16. Lymphatic MAFB regulates vascular patterning during developmental and pathological lymphangiogenesis.
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Dieterich LC, Tacconi C, Menzi F, Proulx ST, Kapaklikaya K, Hamada M, Takahashi S, and Detmar M
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- Animals, Endothelial Cells pathology, Humans, Lymphatic Vessels pathology, MafB Transcription Factor genetics, Mice, Mice, Knockout, Vascular Endothelial Growth Factor C genetics, Vascular Endothelial Growth Factor C metabolism, Vascular Endothelial Growth Factor Receptor-3 genetics, Vascular Endothelial Growth Factor Receptor-3 metabolism, Endothelial Cells metabolism, Lymphangiogenesis, Lymphatic Vessels metabolism, MafB Transcription Factor metabolism
- Abstract
MAFB is a transcription factor involved in the terminal differentiation of several cell types, including macrophages and keratinocytes. MAFB is also expressed in lymphatic endothelial cells (LECs) and is upregulated by VEGF-C/VEGFR-3 signaling. Recent studies have revealed that MAFB regulates several genes involved in lymphatic differentiation and that global Mafb knockout mice show defects in patterning of lymphatic vessels during embryogenesis. However, it has remained unknown whether this effect is LEC-intrinsic and whether MAFB might also be involved in postnatal lymphangiogenesis. We established conditional, lymphatic-specific Mafb knockout mice and found comparable lymphatic patterning defects during embryogenesis as in the global MAFB knockout. Lymphatic MAFB deficiency resulted in increased lymphatic branching in the diaphragm at P7, but had no major effect on lymphatic patterning or function in healthy adult mice. By contrast, tumor-induced lymphangiogenesis was enhanced in mice lacking lymphatic MAFB. Together, these data reveal that LEC-expressed MAFB is involved in lymphatic vascular morphogenesis during embryonic and postnatal development as well as in pathological conditions. Therefore, MAFB could represent a target for therapeutic modulation of lymphangiogenesis.
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- 2020
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17. A CHRNB1 frameshift mutation is associated with familial arthrogryposis multiplex congenita in Red dairy cattle.
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Agerholm JS, McEvoy FJ, Menzi F, Jagannathan V, and Drögemüller C
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- Animals, Autopsy, Cattle, Cattle Diseases diagnosis, Chromosome Mapping, DNA Mutational Analysis, Diagnosis, Female, Imaging, Three-Dimensional, Male, Pedigree, Tomography, X-Ray Computed, Arthrogryposis veterinary, Cattle Diseases genetics, Frameshift Mutation, Genetic Association Studies, Receptors, Nicotinic genetics
- Abstract
Background: Bovine arthrogryposis multiplex congenita (AMC) is a syndromic term for a congenital condition characterized by multiple joint contractures. Rare inherited forms of bovine AMC have been reported in different breeds. For AMC in Angus cattle a causative genomic deletion encompassing the agrin (AGRN) gene, encoding an essential neural regulator that induces the aggregation of acetylcholine receptors (AChRs), is known. In 2015, three genetically related cases of generalized AMC affecting Red dairy calves were diagnosed in Denmark., Results: The family history of three affected calves suggested an autosomal recessive inheritance. Single nucleotide polymorphism (SNP) genotyping showed a single genomic region of extended homozygosity of 21.5 Mb on chromosome 19. Linkage analysis revealed a maximal parametric LOD score of 1.8 at this region. By whole genome re-sequencing of the three cases, two private homozygous non-synonymous variants were detected in the critical interval. Both variants, located in the myosin phosphatase Rho interacting protein (MPRIP) and the cholinergic receptor nicotinic beta 1 subunit gene (CHRNB1), were perfectly associated with the AMC phenotype. Previously described CHRNB1 variants in humans lead to a congenital myasthenic syndrome with impaired neuromuscular transmission. The cattle variant represents a single base deletion in the first exon of CHRNB1 (c.55delG) introducing a premature stop codon (p.Ala19Profs47*) in the second exon, truncating 96 % of the protein., Conclusions: This study provides the first phenotypically and genetically characterized example of a bovine AMC phenotype that represents an inherited neuromuscular disorder corresponding to human congenital myasthenic syndrome. The identified CHRNB1 loss of function variant is predicted to have a deleterious effect on fetal AChR function, which could explain the lethal phenotype reported in this study. The identification of this candidate causative mutation thus widens the known phenotypic spectrum of CHRNB1 mutations and enables selection against this pathogenic variant in Red dairy cattle.
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- 2016
- Full Text
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18. Genomic amplification of the caprine EDNRA locus might lead to a dose dependent loss of pigmentation.
- Author
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Menzi F, Keller I, Reber I, Beck J, Brenig B, Schütz E, Leeb T, and Drögemüller C
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- Animals, DNA Copy Number Variations, Endothelin-3 genetics, Gene Regulatory Networks, Mutation, Quantitative Trait Loci, Receptor, Endothelin A genetics, Receptor, Endothelin B genetics, Chromosome Mapping methods, Genome-Wide Association Study methods, Goats genetics, Pigmentation genetics
- Abstract
The South African Boer goat displays a characteristic white spotting phenotype, in which the pigment is limited to the head. Exploiting the existing phenotype variation within the breed, we mapped the locus causing this white spotting phenotype to chromosome 17 by genome wide association. Subsequent whole genome sequencing identified a 1 Mb copy number variant (CNV) harboring 5 genes including EDNRA. The analysis of 358 Boer goats revealed 3 alleles with one, two, and three copies of this CNV. The copy number is correlated with the degree of white spotting in goats. We propose a hypothesis that ectopic overexpression of a mutant EDNRA scavenges EDN3 required for EDNRB signaling and normal melanocyte development and thus likely lead to an absence of melanocytes in the non-pigmented body areas of Boer goats. Our findings demonstrate the value of domestic animals as reservoir of unique mutants and for identifying a precisely defined functional CNV.
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- 2016
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19. Lethal chondrodysplasia in a family of Holstein cattle is associated with a de novo splice site variant of COL2A1.
- Author
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Agerholm JS, Menzi F, McEvoy FJ, Jagannathan V, and Drögemüller C
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- Animals, Cattle, Cattle Diseases congenital, Cattle Diseases mortality, Dwarfism genetics, Dwarfism mortality, Dwarfism pathology, Female, Male, Mutation, Pedigree, Phenotype, Alternative Splicing, Cattle Diseases genetics, Collagen Type II genetics, Dwarfism veterinary
- Abstract
Background: Lethal chondrodysplasia (bulldog syndrome) is a well-known congenital syndrome in cattle and occurs sporadically in many breeds. In 2015, it was noticed that about 12% of the offspring of the phenotypically normal Danish Holstein sire VH Cadiz Captivo showed chondrodysplasia resembling previously reported bulldog calves. Pedigree analysis of affected calves did not display obvious inbreeding to a common ancestor, suggesting the causative allele was not a rare recessive. The normal phenotype of the sire suggested a dominant inheritance with incomplete penetrance or a mosaic mutation., Results: Three malformed calves were examined by necropsy, histopathology, radiology, and computed tomography scanning. These calves were morphologically similar and displayed severe disproportionate dwarfism and reduced body weight. The syndrome was characterized by shortening and compression of the body due to reduced length of the spine and the long bones of the limbs. The vicerocranium had severe dysplasia and palatoschisis. The bones had small irregular diaphyses and enlarged epiphyses consisting only of chondroid tissue. The sire and a total of four affected half-sib offspring and their dams were genotyped with the BovineHD SNP array to map the defect in the genome. Significant genetic linkage was obtained for several regions of the bovine genome including chromosome 5 where whole genome sequencing of an affected calf revealed a COL2A1 point mutation (g.32473300 G > A). This private sequence variant was predicted to affect splicing as it altered the conserved splice donor sequence GT at the 5'-end of COL2A1 intron 36, which was changed to AT. All five available cases carried the mutant allele in heterozygous state and all five dams were homozygous wild type. The sire VH Cadiz Captivo was shown to be a gonadal and somatic mosaic as assessed by the presence of the mutant allele at levels of about 5% in peripheral blood and 15% in semen., Conclusions: The phenotypic and genetic findings are comparable to a previously reported COL2A1 missense mutation underlying lethal chondrodysplasia in the offspring of a mosaic French Holstein sire (Igale Masc). The identified independent spontaneous splice site variant in COL2A1 most likely caused chondrodysplasia and must have occurred during the early foetal development of the sire. This study provides a first example of a dominant COL2A1 splice site variant as candidate causal mutation of a severe lethal chondrodysplasia phenotype. Germline mosaicism is a relatively frequent mechanism in the origin of genetic disorders and explains the prevalence of a certain fraction of affected offspring. Paternal dominant de novo mutations are a risk in cattle breeding, especially because the ratio of defective offspring may be very high and be associated with significant animal welfare problems.
- Published
- 2016
- Full Text
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20. A breeding experiment confirms the dominant mode of inheritance of the brown coat colour associated with the (496) Asp TYRP1 allele in goats.
- Author
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Dietrich J, Menzi F, Ammann P, Drögemüller C, and Leeb T
- Subjects
- Alleles, Animals, Female, Genes, Dominant, Genotype, Male, Pedigree, Breeding, Goats genetics, Hair Color genetics, Inheritance Patterns, Oxidoreductases genetics
- Published
- 2015
- Full Text
- View/download PDF
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