Asthma Clinical Trial
Official title:
The Role of Nonspecific Immune Response of the Airway Mucosa in Children With Chronic Rhinosinusitis and Asthma
The project is intended to be realised in two phases. In the first stage, a case control study will be performed. In the second phase, double-blind, placebo controlled study will be conducted. In the first phase 3 groups of children will be compare: i) a group of children suffering from chronic rhinosinusitis (CRS) (fulfilling the European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS) criteria) and asthma (fulfilling the Asthma Predictive Index (API) criteria) (CRS+/asthma+, n=90), ii) a group of children suffering from CRS (fulfilling the EPOS criteria) but without asthma symptoms (negative API criteria) (CRS+/asthma-, n=30) and iii) a group of children without symptoms of CRS (negative EPOS criteria) and without asthma symptoms (negative API criteria) (CRS-/asthma-, n=30). In the second phase the effect of intranasal glucocorticosteroids will be assessed. The following research methods will be used: CRS-symptom score questionnaire (SN-5) and Childhood Asthma Control Test (cACT) questionnaires, skin prick test, spirometry, measurement of nitric oxide NO in exhaled breath (FeNO), taste perception test, eosinophil morphology assessment, ratio: glucose concentration in nasal secretion/serum glucose level, concentration of specific immunoglobulin (Ig) E, total immunoglobulin G (IgG) and immunoglobulin A (IgA), the proportion of innate lymphoid cells (ILC) and regulatory lymphocytes cells in the peripheral blood. Endoscopic examination of the upper airways will be performed and samples of the mucosa will be taken. The mucosal examination will be as follows: i) polymerase chain reaction (PCR) examination for the detection of the presence of viral and bacterial genetic material, ii) measurement of the expression of the various messenger ribonucleic acid (mRNA), iii) measurement of the expression of mRNA for the Epithelial-Mesenchymal Transition (EMT) genes and iv) percentage of ILCs.
Persistence of CRS and asthma require multiple interconnected feedback and feed-forward
circuits between ILCs and epithelial cells. It seems that type 2 ILCs (ILC2) are the most
important accelerators of type II immune response that prepare cytokine microenvironment for
Th2 cells chronic activation. What decide on ILC2 accumulation - this is an urgent question.
The aim of the proposed project is to examine the role of the innate immune response of
airways in children suffering from chronic rhinosinusitis and asthma.
The project is intended to be realised in two phases. In the first stage, a case control
study will be performed. In the second phase, double-blind, placebo controlled study will be
conducted. In the first phase 3 groups of children will be compare: i) a group of children
suffering from CRS (fulfilling the EPOS criteria) and asthma (fulfilling the API criteria)
(CRS+/asthma+, n=90), ii) a group of children suffering from CRS (fulfilling the EPOS
criteria) but without asthma symptoms (negative API criteria) (CRS+/asthma-, n=30) and iii) a
group of children without symptoms of CRS (negative EPOS criteria) and without asthma
symptoms (negative API criteria) (CRS-/asthma-, n=30). In the second phase the effect of
intranasal glucocorticosteroids will be assessed. The following research methods will be
used: SN-5 and cACT questionnaires, skin prick test, spirometry, measurement of NO in exhaled
breath, taste perception test, eosinophil morphology assessment, ratio: glucose concentration
in nasal secretion/serum glucose level, concentration of specific immunoglobulin E, total IgG
and IgA, the proportion of ILC2 cells and regulatory cells in the peripheral blood.
Endoscopic examination of the upper airways will be performed and samples of the mucosa will
be taken. The mucosal examination will be as follows: i) PCR examination for the detection of
the presence of viral and bacterial genetic material, ii) measurement of the expression of
the various mRNA types, iii) measurement of the expression of mRNA for the
Epithelial-Mesenchymal Transition (EMT) genes and iv) percentage of ILC 1, 2 and 3 cells and
regulatory cells.
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