Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P50583 (asymmetrical)
 12,197 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Nasal congestion associated with the common cold or allergy is associated with a decreased sensitivity of the sense of smell. This study was designed to detect any relationship between nasal resistance to airflow and the ability to detect odors presented to the nose. In particular we were interested to determine if the asymmetrical nasal resistance to airflow associated with the nasal cycle influenced nasal thresholds to menthol which is detected by trigeminal nerves and vanillin which is detected by olfactory nerves. Nasal resistance to airflow and the thresholds for L-menthol and vanillin were measured for each nasal passage in 17 normal volunteer subjects. Nasal resistance to airflow was asymmetrical due to the nasal cycle with a resistance on the high side of 0.94 +/- 0.15 Pa/cm3 s (mean +/- S.E. n = 17). and 0.48 +/- 0.04 Pa/cm3 s on the low side. The range of unilateral nasal resistances varied from 0.31-2.55 Pa/cm3 s. Despite these variations in nasal resistance to airflow no relationship was found between nasal resistance to airflow and thresholds for menthol or vanillin. Since threshold and nasal resistance are not related in normal subjects this may indicate that it is not the level of nasal congestion that affects the sense of smell in nasal infection and allergy, but some other factor related to the inflammatory response of the nasal mucosa.
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PMID:Olfactory and trigeminal thresholds and nasal resistance to airflow. 281 41

To find whether patients with chronic rhinitis might be congested because of hyporesponsiveness to adrenergic vasoconstrictive influences, we measured nasal airway resistance (NAR) in normals and allergic and non-allergic rhinitics during intravenous infusion of graded doses of phenylephrine. All responded with decreases in NAR and first evidences of NAR fall appeared no later in those with rhinitis than in normals. Nasal congestion and response were asymmetrical; absolute NAR in the low resistance side was similar in all groups and there was little response to phenylephrine. In the high resistance side, NAR reached its minimum by the time the total infused dose was 1400 mcg, indicating maximum response to drug was achieved within the dose range studied. Minimum NAR achieved on the high resistance side was higher in rhinitics suggesting residual vascular engorgement resistant to phenylephrine or non-vascular mucosal swelling. Resistance to adrenergic vasoconstriction does not appear to be the primary contributor to mucosal swelling in chronic rhinitis.
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PMID:Nasal airway response to infused phenylephrine in normals and in patients with allergic and non-allergic rhinitis. 336 11