Respiratory and autonomic dysfunction in congenital central hypoventilation syndrome.
Level 5 - mechanism / opinion, no new human data
Narrative review of preclinical and clinical mechanistic literature
PubMed 27226447 · doi:10.1152/jn.00026.2016
What was done
This narrative review summarizes human observations and experimental animal model data regarding the developmental lineage and physiological role of PHOX2B-expressing neurons in the retrotrapezoid nucleus (RTN), with a focus on their involvement in congenital central hypoventilation syndrome (CCHS).
What was found
The abstract reports no numerical data. It notes that RTN neurons function as central respiratory chemoreceptors utilizing intrinsic proton receptors (TASK-2, GPR4) alongside synaptic inputs, and that murine PHOX2B mutation models demonstrate RTN neuronal agenesis linked to respiratory and autonomic dysfunction.
Why it matters
It outlines the cellular and molecular framework connecting PHOX2B transcription factor mutations to the failure of central CO2 chemosensing and autonomic control in CCHS.
Limits
The abstract contains no primary quantitative data, sample sizes, or systematic review methodology. Conclusions largely depend on translational inference from murine genetic models.
Cited by
- supports Carbon dioxide levels in the blood are what trigger the ventilatory/breathing response.