Developmental Mechanism - Axes Formation
Embryology - 14 Jun 2024 Expand to Translate |
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Introduction
How do you establish the anatomical axes of the embryo? Another well studied model of axis patterning is the establishment of limb axes, in particular this system historically was studied by grafting and rotating parts of the early developing limb.
Note there is some confusion arising in the terminology when comparing animal developmental axes and those of human anatomical axes.
- Developmental Mechanism - Dorsal-Ventral Axis first break in embryonic symmetry
- Developmental Mechanism - Rostro-Caudal Axis superior-inferior axis
- Developmental Mechanism - Left-Right Axis Nodal induces its own expression and that of Lefty, a Nodal feedback inhibitor with a longer diffusion range.
Axes Formation: Dorsal-Ventral Axis | Cranio-Caudal Axis | Left-Right Axis
Factor Links: AMH | hCG | BMP | sonic hedgehog | bHLH | HOX | FGF | FOX | Hippo | LIM | Nanog | NGF | Nodal | Notch | PAX | retinoic acid | SIX | Slit2/Robo1 | SOX | TBX | TGF-beta | VEGF | WNT | Category:Molecular |
Some Recent Findings
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More recent papers |
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This table allows an automated computer search of the external PubMed database using the listed "Search term" text link.
More? References | Discussion Page | Journal Searches | 2019 References | 2020 References Search term: Axes Formation <pubmed limit=5>Axes Formation</pubmed> |
Dorsal-Ventral Axis
dorsoventral, dorso-ventral
Human anatomical position - anterior (ventral), posterior (dorsal)
First break in embryonic symmetry is the anteroposterior axis (A-P) sagittal plane
Signaling Factors
- BMP, Wnt,
- transforming growth factor-beta (TGF-beta)
- fibroblast growth factor (FGF)
- Links: Dorsal-Ventral Axis
Cranio-Caudal Axis
rostrocaudal, craniocaudal, head to tail, superior-inferior, longitudinal plane
Signaling Factors
- Hox - bilateral animals
- Wnt/β-catenin - both bilaterian and non-bilaterian animals
- Links: Cranio-Caudal Axis
Left-Right Axis
left-right axis (L-R) transverse plane
- vertebrates - left side Nodal expression
- sea urchins- right side Nodal expression, inhibit the right mesodermal coelomic pouch (CP) from forming the adult rudiment
Signaling Factors
- Nodal - induces its own expression and that of Lefty.
- Lefty - a Nodal feedback inhibitor with a longer diffusion range.
Primitive node cilia (human stage 8) | Embryo left-right asymmetry pathway[2] |
- Links: Left-Right Axis
References
- ↑ <pubmed>25156256</pubmed>
- ↑ <pubmed>23256866</pubmed>| BMC Biology
Textbooks
Gilbert SF. Developmental Biology. 6th edition. Sunderland (MA): Sinauer Associates; 2000. Axis Formation in Amphibians: The Phenomenon of the Organizer
Lodish H, Berk A, Zipursky SL, et al. Molecular Cell Biology. 4th edition. New York: W. H. Freeman; 2000. Anteroposterior Specification during Embryogenesis | Dorsoventral Patterning by TGFβ-Superfamily Proteins | Molecular Mechanisms of Responses to Morphogens
Madame Curie Bioscience Database Austin (TX): Landes Bioscience; 2000. The Role of Wnt Signaling in Vertebrate Head Induction and the Organizer-Gradient Model Dualism
Reviews
<pubmed></pubmed>
Embryonic Axes: The Long and Short of It in the Mouse
http://www.sciencedirect.com/science/article/pii/S0960982204001484
Articles
Dynamics of anterior–posterior axis formation in the developing mouse embryo http://www.nature.com/ncomms/journal/v3/n2/full/ncomms1671.html
Search PubMed
Search Pubmed: Embryo Axes Formation
Terms
- Longitudinal - (vertical) cranial to caudal (intersection of coronal and sagittal planes) superior inferior
- Sagittal - anteroposterior (intersection of sagittal and transverse planes) anterior (ventral)
- Transverse - horizontal (intersection of coronal and transverse planes) Left Right (sinister,dexter)
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Cite this page: Hill, M.A. (2024, June 14) Embryology Developmental Mechanism - Axes Formation. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Developmental_Mechanism_-_Axes_Formation
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G