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NTR: add sympathoblast (CL_9900001) - #3810

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@ai4c-agent ai4c-agent Bot commented Oct 16, 2026

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Closes #3809

Summary

Adds a new term sympathoblast (temporary ID CL_9900001) as the developmental precursor of postganglionic sympathetic neurons.

Field Value
Label sympathoblast
Related synonym sympathetic neuroblast (PMID:38632395)
Parent neural crest derived neuroblast (CL_0002676)
Logical axiom SubClassOf develops_into some sympathetic neuron (CL_0011103)
Definition reference PMID:38632395 (Edens et al., Nature 2024)

Definition

A neural crest-derived neuroblast that is committed to the sympathetic neuron lineage. Sympathoblasts migrate from the trunk neural crest ventrally towards the dorsal aorta, where they aggregate to form the primary sympathetic ganglia and differentiate into postganglionic sympathetic neurons.

Notes to reviewer

The NTR form on #3809 was submitted with only the preferred label — no definition, parent, anatomy, references, or ORCID were provided. The term is modeled from established developmental-biology usage and the term is cited to a modern, specific reference (Edens et al., Nature 2024). Please confirm or amend:

  • Parent: CL_0002676 (neural crest derived neuroblast). An alternative, more specific intermediate would be a sympathoadrenal progenitor — not currently in CL. Happy to add one if useful.
  • Anatomy relation: no part_of to an UBERON structure has been added, since sympathoblasts are migratory and transient. If a canonical location (e.g. developing sympathetic ganglion) is preferred, this can be added.
  • ORCID: please supply an ORCID for the submitter and I will add a terms:contributor axiom.
  • Chromaffin fate: some literature treats sympathoblasts as bipotent (also giving rise to chromaffin cells); the current definition takes the narrower, more common usage (sympathetic neurons only). Let me know if a broader scope is wanted.

Test plan

  • robot convert on src/ontology/cl-edit.owl — passes
  • CI (ODK QC + reasoning) passes

🤖 Generated by @ai4c-agent

🤖 Generated with Claude Code

Adds a new term 'sympathoblast' as a committed neural crest-derived
neuroblast precursor of postganglionic sympathetic neurons. Modeled as a
subclass of neural crest derived neuroblast (CL_0002676) with a
develops_into (RO_0002203) relation to sympathetic neuron (CL_0011103).

- Definition and synonym 'sympathetic neuroblast' are cited to Edens et
  al., Nature 2024 (PMID:38632395), which uses the term in a modern
  developmental and evolutionary context.
- Uses the temporary CL_99xxxxx ID range (per idrange:81) pending a
  permanent ID assignment on merge.
- The request on issue #3809 omitted parent, definition and ORCID; this
  draft is based on established developmental-biology usage and is open
  for the submitter to refine.

Addresses #3809

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
@ai4c-agent ai4c-agent Bot mentioned this pull request Oct 16, 2026

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[NTR] Sympathoblast

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