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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.

Term:Hyperpolarized transepithelial nasal potential difference
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Accession:HP:6000100 term browser browse the term
Definition:Increased (more negative) voltage across the nasal epithelium.
Comment:The resulting (or basal) potential difference (PD) is negative or polarized (viewed from the epithelial surface) and in normal subjects, it is usually between -15 and -25 mV. The measurement continues by the sequential perfusion of compounds that block inwardly directed sodium transport through inhibition of ENaC (amiloride), followed by augmentation of chloride transport through CFTR. During perfusion of amiloride, the potential difference depolarizes as ENaC transport is reduced, and the PD typically approaches a low polarizing value (typically between 0 and -10 mV).



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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the respiratory system 0
        Abnormal respiratory system physiology 0
          Hyperpolarized transepithelial nasal potential difference 0
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