Evolution of the new vertebrate head by co-option of an ancient chordate skeletal tissue.
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| Title: | Evolution of the new vertebrate head by co-option of an ancient chordate skeletal tissue. |
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| Authors: | Jandzik, David, Garnett, Aaron T., Square, Tyler A., Cattell, Maria V., Yu, Jr-Kai, Medeiros, Daniel M. |
| Source: | Nature. 2/25/2015, Vol. 518 Issue 7540, p534-537. 4p. 3 Color Photographs, 3 Diagrams, 1 Chart. |
| Subjects: | Cartilage, Vertebrates, Skeleton, Cytological research, Histology |
| Abstract: | A defining feature of vertebrates (craniates) is a pronounced head that is supported and protected by a robust cellular endoskeleton. In the first vertebrates, this skeleton probably consisted of collagenous cellular cartilage, which forms the embryonic skeleton of all vertebrates and the adult skeleton of modern jawless and cartilaginous fish. In the head, most cellular cartilage is derived from a migratory cell population called the neural crest, which arises from the edges of the central nervous system. Because collagenous cellular cartilage and neural crest cells have not been described in invertebrates, the appearance of cellular cartilage derived from neural crest cells is considered a turning point in vertebrate evolution. Here we show that a tissue with many of the defining features of vertebrate cellular cartilage transiently forms in the larvae of the invertebrate chordate Branchiostoma floridae (Florida amphioxus). We also present evidence that during evolution, a key regulator of vertebrate cartilage development, SoxE, gained new cis-regulatory sequences that subsequently directed its novel expression in neural crest cells. Together, these results suggest that the origin of the vertebrate head skeleton did not depend on the evolution of a new skeletal tissue, as is commonly thought, but on the spread of this tissue throughout the head. We further propose that the evolution of cis-regulatory elements near an ancient regulator of cartilage differentiation was a major factor in the evolution of the vertebrate head skeleton. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 101169461 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evolution of the new vertebrate head by co-option of an ancient chordate skeletal tissue. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Jandzik%2C+David%22">Jandzik, David</searchLink><br /><searchLink fieldCode="AR" term="%22Garnett%2C+Aaron+T%2E%22">Garnett, Aaron T.</searchLink><br /><searchLink fieldCode="AR" term="%22Square%2C+Tyler+A%2E%22">Square, Tyler A.</searchLink><br /><searchLink fieldCode="AR" term="%22Cattell%2C+Maria+V%2E%22">Cattell, Maria V.</searchLink><br /><searchLink fieldCode="AR" term="%22Yu%2C+Jr-Kai%22">Yu, Jr-Kai</searchLink><br /><searchLink fieldCode="AR" term="%22Medeiros%2C+Daniel+M%2E%22">Medeiros, Daniel M.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 2/25/2015, Vol. 518 Issue 7540, p534-537. 4p. 3 Color Photographs, 3 Diagrams, 1 Chart. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Cartilage%22">Cartilage</searchLink><br /><searchLink fieldCode="DE" term="%22Vertebrates%22">Vertebrates</searchLink><br /><searchLink fieldCode="DE" term="%22Skeleton%22">Skeleton</searchLink><br /><searchLink fieldCode="DE" term="%22Cytological+research%22">Cytological research</searchLink><br /><searchLink fieldCode="DE" term="%22Histology%22">Histology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A defining feature of vertebrates (craniates) is a pronounced head that is supported and protected by a robust cellular endoskeleton. In the first vertebrates, this skeleton probably consisted of collagenous cellular cartilage, which forms the embryonic skeleton of all vertebrates and the adult skeleton of modern jawless and cartilaginous fish. In the head, most cellular cartilage is derived from a migratory cell population called the neural crest, which arises from the edges of the central nervous system. Because collagenous cellular cartilage and neural crest cells have not been described in invertebrates, the appearance of cellular cartilage derived from neural crest cells is considered a turning point in vertebrate evolution. Here we show that a tissue with many of the defining features of vertebrate cellular cartilage transiently forms in the larvae of the invertebrate chordate Branchiostoma floridae (Florida amphioxus). We also present evidence that during evolution, a key regulator of vertebrate cartilage development, SoxE, gained new cis-regulatory sequences that subsequently directed its novel expression in neural crest cells. Together, these results suggest that the origin of the vertebrate head skeleton did not depend on the evolution of a new skeletal tissue, as is commonly thought, but on the spread of this tissue throughout the head. We further propose that the evolution of cis-regulatory elements near an ancient regulator of cartilage differentiation was a major factor in the evolution of the vertebrate head skeleton. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature14000 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 534 Subjects: – SubjectFull: Cartilage Type: general – SubjectFull: Vertebrates Type: general – SubjectFull: Skeleton Type: general – SubjectFull: Cytological research Type: general – SubjectFull: Histology Type: general Titles: – TitleFull: Evolution of the new vertebrate head by co-option of an ancient chordate skeletal tissue. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Jandzik, David – PersonEntity: Name: NameFull: Garnett, Aaron T. – PersonEntity: Name: NameFull: Square, Tyler A. – PersonEntity: Name: NameFull: Cattell, Maria V. – PersonEntity: Name: NameFull: Yu, Jr-Kai – PersonEntity: Name: NameFull: Medeiros, Daniel M. IsPartOfRelationships: – BibEntity: Dates: – D: 25 M: 02 Text: 2/25/2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 518 – Type: issue Value: 7540 Titles: – TitleFull: Nature Type: main |
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