GO:0048318 axial mesoderm development: Embryonic Axis Formation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0048318 axial mesoderm development describes the progression of the axial mesoderm from formation to mature structure, giving rise to the prechordal plate and notochord.
• The axial mesoderm includes the prechordal mesoderm and chordamesoderm, which pattern the anterior neural plate and underlie the notochord.
• Signaling from anterior endoderm, particularly TGF-beta family members, specifies prechordal mesoderm in chick embryos.
• Pcdh18a regulates endocytosis of E-cadherin during axial mesoderm development in zebrafish, affecting cell adhesion dynamics.
• Human axial elongation can be modeled in organoids, where symmetry breaking is controlled by an excitable system.
• Mannose metabolism controls mesoderm specification and symmetry breaking in mouse gastruloids, linking metabolism to axial development.
Description
Axial mesoderm development (GO:0048318) is a fundamental embryonic process that establishes the primary body axis in vertebrates. The axial mesoderm comprises the prechordal mesoderm and chordamesoderm, which give rise to the prechordal plate and the notochord, respectively. These structures are critical for patterning the surrounding tissues, including the neural tube and somites, and for providing mechanical support during early development. Research into this process has revealed conserved molecular mechanisms across species, from zebrafish to humans, involving cell adhesion, signaling pathways, and metabolic cues. Understanding axial mesoderm development is essential for uncovering the etiology of congenital disorders such as neural tube defects and axial skeletal malformations. Moreover, the process serves as a paradigm for studying cell fate specification, tissue morphogenesis, and symmetry breaking in developmental biology.
axial mesoderm development At A Glance
| GO ID | GO:0048318 |
|---|---|
| GO term | axial mesoderm development |
| Ontology | biological_process |
| Synonym | none |
| Major function | Formation and maturation of axial mesoderm, including prechordal plate and notochord |
| Related structures | Prechordal mesoderm, chordamesoderm, prechordal plate, notochord |
| Key signaling pathways | TGF-beta family signaling, E-cadherin endocytosis, metabolic control |
| Model organisms | Zebrafish, chick, mouse, human organoids |
What Is GO:0048318?
GO:0048318 axial mesoderm development is defined as the process whose specific outcome is the progression of the axial mesoderm over time, from its formation to the mature structure. The axial mesoderm includes the prechordal mesoderm and the chordamesoderm. It gives rise to the prechordal plate and to the notochord.
Why Is axial mesoderm development Important in Cell Biology?
Axial mesoderm development is crucial because it establishes the primary body axis and provides essential signals for patterning adjacent tissues. Defects in this process can lead to severe congenital anomalies, including neural tube defects and axial skeletal malformations. The notochord, a derivative of axial mesoderm, serves as a signaling center for the developing spine and is implicated in conditions such as intervertebral disc degeneration. Furthermore, understanding axial mesoderm development informs regenerative medicine efforts, as it relates to the differentiation of pluripotent stem cells into axial progenitors.
• Establishes the anterior-posterior and dorsal-ventral axes during embryogenesis.
• Gives rise to the notochord, which patterns the neural tube and somites.
• Prechordal plate is essential for forebrain development and craniofacial patterning.
• Disruption leads to neural tube defects and axial skeletal disorders.
• Involved in the etiology of chordomas and other notochord-derived tumors.
• Provides a model for studying symmetry breaking and gastrulation.
• Metabolic pathways such as mannose metabolism influence mesoderm specification.
• Single-cell atlases reveal state transitions in axial progenitors.
• Network inference can predict gene regulatory interactions in axial mesoderm.
• Organoid models enable human-specific studies of axial elongation.
What Happens During axial mesoderm development?
Specification of axial mesoderm
In simple terms: The embryo decides which cells will become axial mesoderm.
Axial mesoderm specification begins during gastrulation, when cells ingress through the primitive streak and receive inductive signals. In chick embryos, anterior endoderm-derived TGF-beta family signaling specifies prechordal mesoderm. In zebrafish, Pcdh18a regulates endocytosis of E-cadherin, which is necessary for proper axial mesoderm development. Metabolic cues, such as mannose, also control mesoderm specification and symmetry breaking in mouse gastruloids.
Formation of prechordal mesoderm and chordamesoderm
In simple terms: The axial mesoderm splits into two parts: one that will help form the head and one that will form the notochord.
The axial mesoderm comprises the prechordal mesoderm and chordamesoderm. The prechordal mesoderm migrates anteriorly to form the prechordal plate, which is essential for forebrain induction. The chordamesoderm gives rise to the notochord, a rod-like structure that provides mechanical support and signaling cues. In chick, prechordal mesoderm specification requires TGF-beta family signals from the anterior endoderm.
Elongation and symmetry breaking
In simple terms: The embryo lengthens and establishes left-right symmetry.
Axial elongation involves coordinated cell movements and proliferation. Human organoid models have revealed an excitable system underlying axial elongation, where symmetry breaking is controlled by signaling dynamics. In mouse gastruloids, mannose metabolism influences symmetry breaking and mesoderm specification. Zebrafish developmental atlases have uncovered state-transition dynamics of axial progenitors during late-vertebrate development.
Maturation of axial mesoderm derivatives
In simple terms: The axial mesoderm matures into the notochord and prechordal plate.
The notochord matures into a structure that patterns the surrounding tissues, including the neural tube and somites. The prechordal plate contributes to the forebrain and craniofacial structures. Proper maturation requires the integration of multiple signaling pathways and cell adhesion molecules, as shown by the role of Pcdh18a in E-cadherin endocytosis.
Organizing activities of axial mesoderm
In simple terms: The axial mesoderm sends signals that organize other tissues.
The axial mesoderm has organizing activities that pattern the neural tube and somites. These activities are mediated by secreted factors such as Sonic hedgehog and Noggin. The organizing properties of the axial mesoderm are critical for proper development of the central nervous system and axial skeleton.
Key Genes Involved in GO:0048318 axial mesoderm development
Key genes and proteins involved in axial mesoderm development include transcription factors, signaling molecules, and cell adhesion proteins.
| Gene | Major Role | Research Relevance |
|---|---|---|
| T | Transcription factor essential for notochord development | Knockout leads to loss of notochord and axial defects |
| TBXT | Human homolog of T, required for axial mesoderm | Mutations associated with chordoma |
| PCDH18A | Regulates E-cadherin endocytosis during axial mesoderm development | Zebrafish knockdown causes axial mesoderm defects |
| E-cadherin | Cell adhesion molecule; endocytosis regulated by Pcdh18a | Affects cell sorting and axial mesoderm morphogenesis |
| TGF-beta family | Signaling molecules from anterior endoderm | Specify prechordal mesoderm in chick |
| SHH | Secreted factor from notochord and prechordal plate | Patterns neural tube and somites |
| NOG | Secreted antagonist of BMP signaling | Involved in axial mesoderm organizing activity |
| FOXA2 | Transcription factor in notochord and prechordal plate | Required for axial mesoderm development |
| NOTO | Notochord-specific transcription factor | Essential for notochord development |
| CHRD | Chordin, BMP antagonist secreted by notochord | Organizer activity |
| GSC | Goosecoid, transcription factor in prechordal mesoderm | Specifies anterior axial mesoderm |
| LHX1 | Lim homeodomain transcription factor | Prechordal plate development |
| OTX2 | Transcription factor in anterior mesoderm | Forebrain and prechordal plate patterning |
| WNT3A | Signaling molecule in axial mesoderm | Axis formation and elongation |
| FGF8 | Signaling molecule in axial mesoderm | Elongation and patterning |
| CDX | Transcription factors in posterior mesoderm | Axial elongation and patterning |
| MESP1 | Transcription factor for mesoderm specification | Cardiac and axial mesoderm |
| EOMES | T-box transcription factor | Mesoderm specification and gastrulation |
How Is axial mesoderm development Regulated?
Axial mesoderm development is regulated by a complex network of signaling pathways and metabolic inputs. TGF-beta family signaling from the anterior endoderm specifies prechordal mesoderm in chick. Mannose metabolism controls mesoderm specification and symmetry breaking in mouse gastruloids, indicating a link between metabolism and axial development. Pcdh18a regulates E-cadherin endocytosis, which is necessary for proper axial mesoderm development in zebrafish. Additionally, network inference approaches can dissect cell identity and gene regulatory interactions in axial mesoderm.
axial mesoderm development and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TBXT | Chordoma | Knockout or point mutation in human cell lines |
| PCDH18A | Axial mesoderm defects in zebrafish | Zebrafish knockout or knockdown |
| SHH | Holoprosencephaly | Mouse knockout or knock-in |
| NOG | Multiple synostoses syndrome | Mouse overexpression or knockout |
| FOXA2 | Neural tube defects | Mouse conditional knockout |
Neural tube defects
Disruption of axial mesoderm development can lead to neural tube defects, as the notochord and prechordal plate provide essential patterning signals for the neural tube. Neuro-osteology studies have linked axial mesoderm abnormalities to craniofacial and skeletal malformations.
Chordoma
Chordomas are rare tumors that arise from notochord remnants. The T gene (TBXT) is a key driver of chordoma, and its expression is a hallmark of this disease. Understanding axial mesoderm development provides insights into chordoma pathogenesis.
Axial skeletal malformations
Defects in axial mesoderm development can cause vertebral and rib malformations. The notochord serves as a template for the vertebral column, and its improper formation leads to axial skeletal defects. Neuro-osteology studies have highlighted the role of axial mesoderm in craniofacial development.
From axial mesoderm development-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate notochord formation? | Knockout zebrafish or mouse |
| What is the effect of a point mutation in TBXT? | Knock-in point mutation in human iPSCs |
| How does Pcdh18a affect E-cadherin endocytosis? | Tagged knock-in of PCDH18A in zebrafish |
| Can overexpression of SHH rescue axial defects? | Overexpression in chick embryos |
| What are the downstream targets of T? | RNA-seq after knockout |
| How does mannose metabolism affect symmetry breaking? | Mouse gastruloids with metabolic perturbations |
How to Study the axial mesoderm development Process
| Method | What It Measures | Typical Application |
|---|---|---|
| scRNA-seq | Gene expression at single-cell level | Identify axial progenitor states |
| Network inference | Gene regulatory interactions | Predict key regulators |
| Organoid culture | Self-organization and elongation | Model human axial development |
| Live imaging | Cell movements and morphology | Track axial mesoderm cells |
| RNA-seq | Transcriptome changes | Assess gene expression after perturbation |
| ChIP-seq | Transcription factor binding | Identify T targets |
| Proteomics | Protein abundance and modifications | Study signaling dynamics |
| Metabolic profiling | Metabolite levels | Link metabolism to symmetry breaking |
Single-cell RNA sequencing
Single-cell RNA sequencing (scRNA-seq) has been used to create developmental atlases of axial progenitors, revealing state-transition dynamics during late-vertebrate development. This method allows researchers to identify cell types and gene expression programs involved in axial mesoderm development.
Network inference and in silico perturbation
Network inference approaches, such as those used in the study by Kamimoto et al., can dissect cell identity and predict gene regulatory interactions in axial mesoderm. In silico gene perturbation can prioritize candidate regulators for experimental validation.
Organoid models
Human organoids can model axial elongation and symmetry breaking, providing a platform to study human-specific aspects of axial mesoderm development. These models allow controlled manipulation of signaling pathways and metabolic inputs.
Imaging and lineage tracing
Live imaging and lineage tracing in zebrafish and chick embryos have been used to track axial mesoderm cell movements and differentiation. These techniques reveal dynamic cellular behaviors during development.
How CRISPR Can Be Used to Study GO:0048318 axial mesoderm development
Knockout
CRISPR knockout of genes such as PCDH18A in zebrafish or TBXT in human cell lines can reveal their essential roles in axial mesoderm development. Knockout models help determine loss-of-function phenotypes and validate candidate genes from network inference.
Point Mutation
Point mutations in genes like TBXT can be introduced using CRISPR to model chordoma-associated variants. These models help understand how specific mutations affect protein function and axial mesoderm development.
Knock-in
Knock-in of tagged versions of proteins, such as Pcdh18a-GFP, allows visualization of protein localization and dynamics in axial mesoderm cells. Knock-in of reporter genes can also monitor signaling pathways.
Overexpression
Overexpression of signaling molecules like SHH or NOG using CRISPR activation or transgenic approaches can test sufficiency in axial mesoderm patterning. Overexpression models complement knockout studies.
How EDITGENE Supports axial mesoderm development Research
Researchers studying axial mesoderm development-related genes often need to determine whether a candidate gene is causally involved in the process, and what its precise function is. This requires robust genetic models that can be rapidly generated and validated.
Contact EDITGENE today to design your custom CRISPR model for axial mesoderm development research.
Frequently Asked Questions About axial mesoderm development
What is axial mesoderm development?
Axial mesoderm development (GO:0048318) is the process by which the axial mesoderm, including the prechordal mesoderm and chordamesoderm, progresses from formation to mature structures such as the prechordal plate and notochord.
What genes are involved in axial mesoderm development?
Key genes include T (TBXT), PCDH18A, SHH, NOG, FOXA2, and others involved in signaling and cell adhesion.
What is the function of the notochord?
The notochord, derived from chordamesoderm, provides mechanical support and secretes patterning signals such as SHH and Noggin to organize the neural tube and somites.
How is axial mesoderm specified?
Axial mesoderm is specified during gastrulation by inductive signals, including TGF-beta family members from the anterior endoderm, and is influenced by metabolic cues like mannose.
What diseases are associated with axial mesoderm defects?
Defects can lead to neural tube defects, axial skeletal malformations, and chordoma, a tumor derived from notochord remnants.
What model organisms are used to study axial mesoderm development?
Zebrafish, chick, mouse, and human organoids are commonly used models.
How does Pcdh18a regulate axial mesoderm development?
Pcdh18a regulates the endocytosis of E-cadherin, which is necessary for proper cell adhesion dynamics during axial mesoderm development in zebrafish.
What is the role of mannose in axial mesoderm development?
Mannose metabolism controls mesoderm specification and symmetry breaking in mouse gastruloids, linking metabolic state to axial development.
Can CRISPR be used to study axial mesoderm development?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models can be used to study gene function in axial mesoderm development.
What research methods are used to study axial mesoderm development?
Methods include single-cell RNA sequencing, network inference, organoid culture, live imaging, and CRISPR screening.
Conclusion
Axial mesoderm development (GO:0048318) is a cornerstone of vertebrate embryogenesis, giving rise to the prechordal plate and notochord that pattern the body axis. Research across model organisms has elucidated key signaling pathways, cell adhesion mechanisms, and metabolic inputs that control this process. Dysregulation of axial mesoderm development is linked to congenital disorders and chordoma, making it a critical area of study. Advances in single-cell technologies and organoid models continue to provide new insights into the molecular and cellular dynamics of axial mesoderm development.
References
- 1. Kamimoto K et al.. 2023. Dissecting cell identity via network inference and in silico gene perturbation.. Nature 614(7949):742-751 PMID: 36755098
- 2. Manning E et al.. 2024. Organizing activities of axial mesoderm.. Curr Top Dev Biol 157:83-123 PMID: 38556460
- 3. Kjaer I. 1998. Neuro-osteology.. Crit Rev Oral Biol Med 9(2):224-44 PMID: 9603237
- 4. Bosze B et al.. 2020. Pcdh18a regulates endocytosis of E-cadherin during axial mesoderm development in zebrafish.. Histochem Cell Biol 154(5):463-480 PMID: 32488346
- 5. Anand GM et al.. 2023. Controlling organoid symmetry breaking uncovers an excitable system underlying human axial elongation.. Cell 186(3):497-512.e23 PMID: 36657443
- 6. Vesque C et al.. 2000. Development of chick axial mesoderm: specification of prechordal mesoderm by anterior endoderm-derived TGFbeta family signalling.. Development 127(13):2795-809 PMID: 10851126
- 7. Dingare C et al.. 2024. Mannose controls mesoderm specification and symmetry breaking in mouse gastruloids.. Dev Cell 59(12):1523-1537.e6 PMID: 38636516
- 8. Lange M et al.. 2024. A multimodal zebrafish developmental atlas reveals the state-transition dynamics of late-vertebrate pluripotent axial progenitors.. Cell 187(23):6742-6759.e17 PMID: 39454574
