On the mechanism of smell loss in patients with Type II congenital hyposmia
| Autor: | Alexandra B. Knöppel, Mona Abdelmeguid, Robert I. Henkin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Adult
Male 0301 basic medicine medicine.medical_specialty Adolescent Mucous membrane of nose Olfaction Disorders Young Adult 03 medical and health sciences 0302 clinical medicine Theophylline Hyposmia Internal medicine Cyclic AMP otorhinolaryngologic diseases medicine Humans Hedgehog Proteins Sonic hedgehog Child Receptor Cyclic GMP Aged Aged 80 and over Olfactory receptor biology Tumor Necrosis Factor-alpha business.industry Middle Aged respiratory system Mucus Bronchodilator Agents Nasal Mucosa 030104 developmental biology Endocrinology medicine.anatomical_structure Otorhinolaryngology Case-Control Studies biology.protein Smell function Female medicine.symptom business 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | American Journal of Otolaryngology. 37:436-441 |
| ISSN: | 0196-0709 |
| DOI: | 10.1016/j.amjoto.2016.04.001 |
| Popis: | Background Smell function has been initiated with theophylline treatment in 63% of patients with Type II congenital smell loss. Based upon a systematic evaluation of the protein components of nasal mucus we have demonstrated that interactions among four chemical moieties in nasal mucus may play significant roles in this initiation. Prior to treatment three of these moieties, cAMP, cGMP and sonic hedgehog (Shh), were significantly decreased in concentration whereas one of these moieties, TNFalpha, was increased in concentration. The mechanism(s) responsible for initiation of smell function in these patients, not immediately apparent, may depend upon understanding interactions among these moieties. Methods Measurements of cAMP, cGMP, Shh and TNFalpha in nasal mucus by specific spectrophotometric immunoassays before and after treatment with theophylline. Results Before theophylline treatment cAMP, cGMP and Shh in nasal mucus, which act as growth factors to support olfactory receptor function, were significantly decreased below normal levels whereas TNFalpha which acts as a “death factor” to inhibit olfactory receptor function was significantly increased above normal. After theophylline treatment cAMP, cGMP and Shh increased significantly whereas TNFalpha decreased significantly. Conclusions These results indicate that there are specific biochemical changes associated with smell loss in patients with Type II congenital smell loss and that correction of these biochemical changes are associated with initiation of smell function in these patients. Understanding these relationships play an important role in understanding receptor action in smell function. |
| Databáze: | OpenAIRE |
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