GO:0021535 cell migration in hindbrain: Developmental Process, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0021535 cell migration in hindbrain describes the orderly movement of cells that will reside in the hindbrain, a biological process essential for correct neural circuit formation.
• Hindbrain cell migration includes tangential and radial movements of neural crest derivatives, facial branchiomotor neurons, and cerebellar granule cells.
• Key molecular guidance cues include Robo1 and Robo2 repellent receptors, which cooperate to guide facial neuron migration in the embryonic mouse hindbrain.
• Single-cell transcriptomic mapping of the Atoh1 lineage has revealed neural fate decisions and neuronal diversity underlying hindbrain cell migration.
• Disrupted hindbrain cell migration is linked to developmental disorders such as cerebellar hypoplasia and facial nerve miswiring.
• CRISPR-based knockout, knock-in, and overexpression models enable causal testing of candidate genes in hindbrain migration.
Description
Cell migration in the hindbrain (GO:0021535) is the orderly movement of cells that will reside in the hindbrain, a transient embryonic structure that gives rise to the cerebellum, pons, and medulla. This process is fundamental for establishing the correct spatial arrangement of neurons and glia during development, and its disruption can lead to severe neurological defects. The hindbrain is a highly segmented structure, and cell migration across rhombomere boundaries is tightly regulated to maintain regional identity. Neural crest cells, facial branchiomotor neurons, and cerebellar granule cells are among the best-studied populations that undergo migration within this region. Understanding the molecular and cellular mechanisms of hindbrain cell migration is therefore critical for developmental biology and for interpreting the etiology of congenital brain malformations. Recent advances in single-cell transcriptomics have begun to resolve the gene regulatory programs that specify and guide these migrating cells. This article synthesizes authoritative QuickGO annotation and verified PubMed literature to provide a research-grade overview of GO:0021535, its associated genes, and the experimental models used to study it.
cell migration in hindbrain At A Glance
| GO ID | GO:0021535 |
|---|---|
| GO term | cell migration in hindbrain |
| Ontology | biological_process |
| Synonym | none |
| Major function | Orderly movement of cells that will reside in the hindbrain |
| Related processes | Neural crest cell migration, facial branchiomotor neuron migration, cerebellar granule cell migration |
| Key guidance molecules | Robo1, Robo2, PACAP, Atoh1 |
| Associated cell types | Neural crest cells, facial branchiomotor neurons, cerebellar granule cells, Bergmann glia |
| Developmental context | Embryonic hindbrain patterning and rhombomere boundary formation |
What Is GO:0021535?
According to the Gene Ontology, GO:0021535 cell migration in hindbrain is defined as the orderly movement of a cell that will reside in the hindbrain. This biological process encompasses the directed translocation of cells into, within, and through the embryonic hindbrain, ensuring that they reach their correct final positions. It includes both tangential and radial migration modes and is distinct from general cell motility because it is spatially and temporally restricted to the hindbrain territory.
Why Is cell migration in hindbrain Important in Cell Biology?
Cell migration in the hindbrain is essential for the proper assembly of brainstem and cerebellar circuits, and defects in this process are associated with developmental disorders including cerebellar hypoplasia, facial nerve miswiring, and certain neurodevelopmental syndromes. Because the hindbrain is a model system for studying segmental patterning and neuronal migration, insights gained here inform broader principles of brain development and have direct relevance to regenerative medicine and disease modeling.
• Establishes correct neuronal positioning in the cerebellum, pons, and medulla.
• Guides facial branchiomotor neurons to their proper locations, affecting cranial nerve function.
• Underlies neural crest contributions to hindbrain-derived structures.
• Disruption is linked to cerebellar hypoplasia and granule cell migration defects.
• Robo1/Robo2 signaling defects cause facial neuron miswiring in mouse models.
• PACAP signaling modulates granule cell migration and cerebellar development.
• Single-cell transcriptomics of the Atoh1 lineage reveals fate decisions relevant to migration.
• Provides a paradigm for studying rhombomere boundary segregation.
• Informs CRISPR-based disease modeling of hindbrain malformations.
• Relevant to understanding medulloblastoma origins from cerebellar granule cell precursors.
What Happens During cell migration in hindbrain?
Specification and delamination of migratory cells
In simple terms: First, cells are told what to become and then they detach from their original location.
In the developing hindbrain, neural crest cells and specific neuronal precursors are specified by regional signals and then undergo delamination to begin migration. The Atoh1 lineage contributes to distinct neuronal populations in the hindbrain, and single-cell transcriptomic mapping has identified neural fate decisions that precede migration. This step establishes the pool of cells that will subsequently move.
Tangential and radial migration modes
In simple terms: Cells move either sideways along the surface or outward from the center.
Hindbrain cells employ both tangential and radial migration. Facial branchiomotor neurons migrate tangentially from rhombomere 4 to rhombomere 6 in a process dependent on multiple mechanisms. Cerebellar granule cells migrate radially from the external granular layer inward along Bergmann glia fibers. These distinct modes are coordinated to achieve correct final positioning.
Guidance by repellent and attractive cues
In simple terms: Molecular signals act like traffic signs, telling cells where to go and where not to go.
Robo1 and Robo2 repellent receptors cooperate to guide facial neuron cell migration and axon projections in the embryonic mouse hindbrain. PACAP signaling also controls granule cell migration, adding another layer of regulation. These guidance cues ensure that migrating cells navigate the complex hindbrain environment accurately.
Rhombomere boundary segregation
In simple terms: Cells respect invisible fences between hindbrain segments.
The hindbrain is partitioned into rhombomeres, and cell segregation at boundaries prevents mixing of cells from adjacent segments. This boundary maintenance is critical for preserving regional identity and for directing migrating cells to appropriate targets. Disruption of boundary formation can lead to ectopic cell migration and patterning defects.
Termination and integration into target nuclei
In simple terms: Finally, cells stop moving and settle into their new home.
Once migratory cells reach their destination, they cease migration and integrate into developing nuclei. For example, cerebellar granule cells complete their migration and form the internal granular layer. This final step is essential for functional circuit formation and is regulated by both intrinsic and extrinsic signals.
Key Genes Involved in GO:0021535 cell migration in hindbrain
The following genes and proteins have been experimentally implicated in cell migration in hindbrain (GO:0021535) based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| Atoh1 | Specification of hindbrain neuronal lineages | Single-cell transcriptomic mapping of Atoh1 lineage reveals fate decisions |
| Robo1 | Repellent receptor guiding facial neuron migration | Cooperates with Robo2 in mouse hindbrain migration |
| Robo2 | Repellent receptor guiding facial neuron migration | Cooperates with Robo1 in mouse hindbrain migration |
| PACAP | Modulates granule cell migration | Controls cerebellar granule cell migration |
| BDNF | Neurotrophic factor influencing granule cell migration | Discussed in granule cell migration reviews |
| NT-3 | Neurotrophin affecting cerebellar development | Implicated in granule cell migration |
| GABA | Neurotransmitter modulating migration | Regulates granule cell migration |
| NMDA receptor | Glutamate receptor influencing migration | Involved in granule cell migration |
| Ca2+ channels | Calcium signaling for migration | Required for granule cell movement |
| Integrins | Cell adhesion during migration | Mediate granule cell migration along glia |
| Bergmann glia | Scaffold for radial granule cell migration | Essential for granule cell migration |
| Wnt signaling | Patterning and migration cues | Discussed in hindbrain boundary context |
| Ephrin/Eph | Boundary formation and repulsion | Involved in rhombomere segregation |
| Cadherins | Cell adhesion at boundaries | Maintain rhombomere segregation |
| Slit | Ligand for Robo receptors | Guides facial neuron migration |
| Netrin | Axon guidance cue | May influence hindbrain cell migration |
| Semaphorins | Repulsive guidance cues | Implicated in motor neuron migration |
How Is cell migration in hindbrain Regulated?
Cell migration in the hindbrain is regulated by a combination of transcriptional programs, guidance cues, and signaling pathways. The Atoh1 lineage transcription factor specifies neuronal fate decisions that precede migration. Robo1 and Robo2 repellent receptors cooperate to regulate facial neuron migration, with Slit ligands providing directional cues. PACAP signaling modulates the timing and extent of granule cell migration. Neurotransmitters such as GABA and glutamate, along with calcium signaling, fine-tune the migratory behavior of cerebellar granule cells. Additionally, cell adhesion molecules including cadherins and integrins maintain tissue architecture and permit directed movement.
cell migration in hindbrain and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| Robo1 | Facial nerve miswiring | Knockout mouse, zebrafish |
| Robo2 | Facial nerve miswiring | Knockout mouse, zebrafish |
| Atoh1 | Medulloblastoma, cerebellar development | Conditional knockout mouse |
| PACAP | Cerebellar granule cell migration defects | Knockout mouse |
| Bergmann glia genes | Cerebellar hypoplasia | Transgenic mouse |
Cerebellar hypoplasia and granule cell migration defects
Disrupted migration of cerebellar granule cells can lead to cerebellar hypoplasia, a condition characterized by reduced cerebellar volume and motor deficits. Bergmann glia dysfunction impairs granule cell migration and has been linked to cerebellar malformations. PACAP signaling abnormalities also affect granule cell migration and may contribute to cerebellar disorders.
Facial nerve miswiring and cranial nerve disorders
Robo1 and Robo2 are required for correct facial branchiomotor neuron migration; their loss leads to facial nerve miswiring in mouse models. Multiple mechanisms mediate motor neuron migration in the zebrafish hindbrain, and defects in these pathways can cause cranial nerve dysfunction. These findings have implications for congenital facial palsy and related conditions.
Neural crest-related developmental syndromes
Neural crest cells contribute to craniofacial and hindbrain structures, and errors in their migration can result in developmental syndromes such as DiGeorge syndrome and CHARGE syndrome. Understanding the molecular control of neural crest migration in the hindbrain is therefore relevant to these congenital disorders.
Medulloblastoma and cerebellar tumorigenesis
Cerebellar granule cell precursors, which undergo extensive migration during development, are the cells of origin for medulloblastoma, a common pediatric brain tumor. Aberrant migration and proliferation of these cells may contribute to tumor initiation, making GO:0021535 relevant to cancer biology.
From cell migration in hindbrain-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate hindbrain cell migration? | Knockout zebrafish or mouse |
| What is the effect of a point mutation in Robo1? | Point-mutation knock-in mouse |
| How does Atoh1 lineage contribute to migration? | Atoh1-Cre lineage tracing |
| Can overexpression of PACAP enhance migration? | Overexpression transgenic model |
| Where is Robo1 expressed during migration? | Tagged knock-in reporter |
| What are the transcriptomic changes during migration? | Single-cell RNA-seq |
How to Study the cell migration in hindbrain Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Single-cell RNA-seq | Transcriptomic profiles of migrating cells | Identifying fate decisions in Atoh1 lineage |
| Lineage tracing | Cell ancestry and migration paths | Tracking hindbrain neural crest and neurons |
| Live imaging | Real-time cell movement | Observing facial neuron migration |
| Immunohistochemistry | Protein localization | Detecting Robo1/Robo2 in hindbrain |
| In situ hybridization | mRNA localization | Mapping PACAP expression |
| Knockout models | Gene function loss | Testing Robo1/Robo2 in migration |
| Behavioral assays | Functional outcomes | Assessing facial nerve function |
Single-cell transcriptomics
Single-cell RNA sequencing has been used to map the Atoh1 lineage in the developing hindbrain, revealing neural fate decisions and neuronal diversity that underlie migration. This method identifies gene expression programs specific to migratory cells.
Lineage tracing and live imaging
Genetic lineage tracing with Cre-lox systems and live imaging in zebrafish or mouse embryos allows direct observation of cell migration in the hindbrain. These techniques reveal migration paths, speed, and directionality.
Immunohistochemistry and in situ hybridization
These methods detect the spatial distribution of guidance molecules such as Robo1, Robo2, and PACAP in the hindbrain. They are essential for correlating gene expression with migratory routes.
Genetic perturbation and behavioral assays
Knockout and knockdown experiments in model organisms test the causal role of candidate genes in hindbrain cell migration. Behavioral assays such as facial nerve function tests assess the functional consequences of migration defects.
How CRISPR Can Be Used to Study GO:0021535 cell migration in hindbrain
Knockout
CRISPR knockout of candidate genes such as Robo1 or Robo2 in mouse or zebrafish can test their requirement for hindbrain cell migration. Knockout models reveal loss-of-function phenotypes including miswiring and ectopic migration.
Point Mutation
Introducing precise point mutations in genes like Robo1 allows researchers to dissect specific domains required for guidance activity. This approach can model human variants associated with migration disorders.
Knock-in
Knock-in of fluorescent reporters or epitope tags into endogenous loci such as Atoh1 enables visualization of migratory cells in real time. Tagged knock-in models are valuable for live imaging and biochemical studies.
Overexpression
Overexpression of guidance molecules like PACAP or Robo1 can test sufficiency for promoting or altering migration. These models help determine whether increased signaling is sufficient to drive ectopic migration.
How EDITGENE Supports cell migration in hindbrain Research
Researchers studying cell migration in hindbrain-related genes often need to determine whether a candidate gene is causally involved in the migratory process. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell and animal models, enabling rigorous functional interrogation of GO:0021535-associated genes.
Contact EDITGENE today to design your custom CRISPR model for cell migration in hindbrain research.
Frequently Asked Questions About cell migration in hindbrain
What is GO:0021535 cell migration in hindbrain?
GO:0021535 is a Gene Ontology biological process term defined as the orderly movement of a cell that will reside in the hindbrain.
What genes are involved in cell migration in hindbrain?
Key genes include Atoh1, Robo1, Robo2, PACAP, and various neurotrophins and adhesion molecules.
Why is hindbrain cell migration important?
It ensures correct neuronal positioning in the cerebellum, pons, and medulla, and defects are linked to developmental disorders.
What diseases are associated with defective hindbrain cell migration?
Cerebellar hypoplasia, facial nerve miswiring, and medulloblastoma have been associated with migration defects.
How do Robo1 and Robo2 regulate hindbrain cell migration?
Robo1 and Robo2 are repellent receptors that cooperate to guide facial neuron migration and axon projections in the embryonic mouse hindbrain.
What is the role of PACAP in granule cell migration?
PACAP signaling controls the migration of cerebellar granule cells during cerebellum development.
How can CRISPR be used to study hindbrain cell migration?
CRISPR knockout, knock-in, and overexpression models allow causal testing of candidate genes in migration assays.
What model organisms are used to study hindbrain cell migration?
Zebrafish and mouse are commonly used due to their accessible embryos and conserved hindbrain anatomy.
What methods are used to study cell migration in hindbrain?
Single-cell RNA-seq, lineage tracing, live imaging, immunohistochemistry, and genetic perturbation are key methods.
What is the Atoh1 lineage in the hindbrain?
The Atoh1 lineage comprises neural progenitors that give rise to diverse hindbrain neurons, and single-cell transcriptomics has mapped their fate decisions.
Conclusion
GO:0021535 cell migration in hindbrain is a fundamental developmental process that ensures correct neuronal positioning in the brainstem and cerebellum. Research using zebrafish and mouse models has identified key guidance molecules such as Robo1, Robo2, and PACAP, and single-cell transcriptomics is revealing the gene regulatory programs underlying migration. Disruptions in this process are linked to cerebellar hypoplasia, facial nerve miswiring, and medulloblastoma, underscoring its clinical relevance. Continued investigation using CRISPR-based models will further elucidate the mechanisms of hindbrain cell migration and inform therapeutic strategies for related disorders.
References
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- 2. Terriente J et al.. 2015. Cell segregation in the vertebrate hindbrain: a matter of boundaries.. Cell Mol Life Sci 72(19):3721-30 PMID: 26089248
- 3. Komuro H et al.. 2003. Recent advances in cerebellar granule cell migration.. Cell Mol Life Sci 60(6):1084-98 PMID: 12861377
- 4. Xu H et al.. 2013. Bergmann glia function in granule cell migration during cerebellum development.. Mol Neurobiol 47(2):833-44 PMID: 23329344
- 5. Bronner-Fraser M. 1994. Neural crest cell formation and migration in the developing embryo.. FASEB J 8(10):699-706 PMID: 8050668
- 6. Cameron DB et al.. 2009. Role of PACAP in controlling granule cell migration.. Cerebellum 8(4):433-40 PMID: 19548046
- 7. Bingham SM et al.. 2010. Multiple mechanisms mediate motor neuron migration in the zebrafish hindbrain.. Dev Neurobiol 70(2):87-99 PMID: 19937772
- 8. Gruner HN et al.. 2019. Robo1 and 2 Repellent Receptors Cooperate to Guide Facial Neuron Cell Migration and Axon Projections in the Embryonic Mouse Hindbrain.. Neuroscience 402:116-129 PMID: 30685539
