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1
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Cough sensitivity in localized sclerodermia with no clinical symptoms from lower airways

100%
Pecova R., Frlickova Z., Pec J., Tatar M.
Journal of Physiology and Pharmacology. Supplement
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2003
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tom 54
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nr 1
25-28
Cough sensitivity is increased in patients with atopic dermatitis, although they have no clinical symptoms from the lower airways. In the present study we examined the cough sensitivity to capsaicin in patients, who had no clinical respiratory symptoms, with sclerodermia localized to the skin. Cough sensitivity was defined as the lowest capsaicin concentration, which evokes 2 or more coughs. Twelve patients and 12 healthy matched volunteers, as a comparison group, inhaled deep breaths (2 L) of a capsaicin aerosol in doubled concentrations (from 0.02 to 200 µmol/L). Cough sensitivity, expressed as a geometric mean (95% CI) of capsaicin concentration, was 0.15 µmol/L (0.04 to 0.56) in the patients with localized sclerodermia and 4.96 µmol/L (2.50 to 9.85) in controls, which made a significant difference towards higher cough sensitivity in sclerodemia, respiratory symptom-free patients. Thus, disease processes localized outside the respiratory tract may have surreptitious pulmonary manifestation that is brought to light by the capsaicin cough test.
2
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Effects of intranasal histamine on the cough reflex in subjects with allergic rhinitis

100%
Plevkova J., Brozmanova M., Pecova R., Tatar M.
Journal of Physiology and Pharmacology. Supplement
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2005
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tom 56
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nr 4
185-195
In the present study we investigated the effects of nasal histamine on the intensity of coughing and the effects of intensified nasal breathing following nasal histamine on cough sensitivity (CS) in 14 subjects with seasonal allergic rhinitis. The study consisted of two parts performed one week apart. First, baseline CS to capsaicin was determined, followed by intranasal histamine challenge (4mg/ml, 0.1 ml) and the count of the number of coughs to inhaled capsaicin on the background of most intensive nasal symptoms (sneezing, itching, rhinorrhea, and nasal blockage) evoked by histamine. In the second part, CS was determined after intranasal histamine followed by 10 min of intensified nasal breathing through the nose or mouth in a randomized order at 2-day intervals. The number of coughs induced after intranasal histamine was significantly higher, compared with intranasal saline, [9 (7-12) vs. 4.5 (4-6), P<0.001]. CS also was significantly increased after nasal histamine, but nasal intensified breathing failed to cause any changes in CS. We conclude that stimulation of nasal mucosa with histamine enhanced the cough response in subjects with allergic rhinitis.
3
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Testing of cough reflex sensitivity in children suffering from allergic rhinitis and common cold

84%
Plevkova J., Varechova S., Brozmanova M., Tatar M.
Journal of Physiology and Pharmacology. Supplement
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2006
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tom 57
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nr 4
289-296
Cough associated with upper respiratory tract disorders is a common and troublesome problem in children and little is known about the etiology of this type of cough. This study examined the capsaicin cough sensitivity (CS) in children suffering from allergic rhinitis (AR) and upper respiratory tract infection (URI), comparing it with that in healthy children taken as controls (C). CS to capsaicin, spirometry, skin prick tests, and nose-throat examination were performed in 61 children grouped by the diagnosis of AR, URI, and C. The results, in order of C vs. AR vs. URI, expressed as a geometric mean (±95% CI) log10 µM of capsaicin for C2 (the lowest concentration of capsaicin in µmol/l required to induce 2 coughs) were: 1.8 (1.6-1.9) vs. 1.0 (0.8-1.2) vs. 0.48 (0.2-0.8), P<0.001 and for C5 (the lowest concentration of capsaicin in µmol/l required to induce 5 coughs) 2.9 (2.8-2.9) vs. 2.6 (2.5-2.6) vs. 2.1 (2.0 –2.3), P<0.05. We found that CS in children with AR, even when tested out of pollen season, was significantly heightened compared with controls. CS in children with URI was extremely high compared with both C and AR groups. We conclude that pathological processes in the nose of any etiology could cause a sensitization of the cough reflex with decreased cough threshold during asymptomatic period of AR. Cough also is enhanced by acute inflammation in the upper airways in nonatopic children.
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Role of gender and pubertal stage on cough sensitivity in childhood and adolescence

67%
Varechova S., Plevkova J., Hanacek J., Tatar M.
Journal of Physiology and Pharmacology. Supplement
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2008
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tom 59
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nr 6
719-726
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