Detection of Cav1 Calcium Channels in Inflammatory Cells of Asthmatic Children (CAVASTHME)
Asthma affects about 10% of children and 6% of adults in industrialized countries. Lymphocytes (L) Th2, a T cell population (LT) producing interleukin (IL) -4, 5 and 13 are broadly involved in this pathology in experimental models and in humans. Many studies show that the signaling pathways activated by the commitment of T receiver differ depending LT. The identification of specific signaling pathways links to Th2 offer new therapeutic approaches. Precedent study showed that mouse Th2 selectively expressed related to calcium channels sensitive channels Cav1 voltage, normally found in excitable cells where they are defined as receivers dihydropyridine (DHP).
The goal of the present study is to show the presence of Cav1 channels in inflammatory cells in allergic asthmatics and show overexpression of these channels in the peripheral blood mononuclear cells from asthmatic subjects before and / or after stimulation with the TCR in comparison with controls.
調査の概要
研究の種類
入学 (実際)
段階
- 適用できない
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
For Asthmatic children arm :
- Girl not in childbearing potential or taking contraceptive treatment
- Asthma diagnosis in at least 6 months as defined by clinical symptoms (expiratory dyspnea, wheezing, sibilance) and respiratory function (reversibility of VEMS at least 12% after salbutamol administration)
- Allergologic tests positives to airborne allergens : positive prick test and/or specific IgE > 0,35 kU/L for at least one allergen
- Asthma severity between mild to moderate based on Global initiative for asthma classification during more than one month with inhaled corticotherapies +/- long term action beta -mimetic long compounds (salmeterol, formoterol)
- Patient insured with a social security scheme
For control children arm :
- Girl not in childbearing potential or taking contraceptive treatment
- No medical history of asthma
- No medical history of allergy or symptoms of allergy on skin (atopic dermatitis), respiratory tract (rhino-conjunctivitis, asthma) or food allergy
Exclusion Criteria:
For both arms:
- Chronic respiratory pathology : known occlusive or restrictive respiratory syndrome like interstitial lung disease, neuromuscular disease, mucoviscidoses, respiratory tract abnormalities with cough, dyspnea or digital hippocratism.
- History of pulmonary or nose and throat infectious disease during last 4 months
- Parasitic disease non treated during last 3 months
- Dyspnea during the inclusion
- Systemic corticotherapy during the last 3 months before inclusion
- Immunosuppressive therapy during the last 3 months before inclusion
- Diabeta
- Disease causing immune disorder
- Infection during inclusion
- Participation to another study witch implies medical treatment during last 3 months before inclusion
For asthmatic children arm :
- Chronic pulmonary pathology (excluding asthma)
- Asthma exacerbation during inclusion
- VEMS < 70% of normal range or VEMS < 70% of normal range after inhalation of serum (despite salbutamol administration)
- Patient unable to complete pulmonary function testing
研究計画
研究はどのように設計されていますか？
デザインの詳細
- 主な目的：基礎科学
- 割り当て：非ランダム化
- 介入モデル：並列代入
- マスキング：なし（オープンラベル）
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
|
実験的：Asthmatic children
Induced sputum method using hypertonic serum
|
Collection of expectoration in sterile vial, conserved in ice all along the examination
|
|
偽コンパレータ：Control children
Induced sputum method using hypertonic serum
|
Collection of expectoration in sterile vial, conserved in ice all along the examination
|
この研究は何を測定していますか？
主要な結果の測定
結果測定 |
時間枠 |
|---|---|
|
Detection of sequence coding for Cav1 in cells as assessed by reverse transcription polymerase chain reaction
時間枠：Day 1
|
Day 1
|
二次結果の測定
結果測定 |
時間枠 |
|---|---|
|
Presence of Cav1 channels as assessed by correlation between Cav1 expression and eosinophils in expectoration collection
時間枠：Day 1
|
Day 1
|
|
Presence of Cav1 channels as assessed by correlation between Cav1 expression and lymphocytes T in expectoration collection
時間枠：Day 1
|
Day 1
|
|
Comparison of CRTH2+ cells in total blood between asthmatic and control group
時間枠：Day 1
|
Day 1
|
|
Comparison of Cav1 channels and cytokines Th2 expression between asthmatic and control group before T-Cell receptor stimulation
時間枠：Day 1
|
Day 1
|
|
Comparison of Cav1 channels and cytokines Th2 expression between asthmatic and control group after T-Cell receptor stimulation
時間枠：Day 1
|
Day 1
|
協力者と研究者
捜査官
- 主任研究者：François Brémont, MD、Hôpital des Enfants CHU Toulouse
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。