- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT01759849
Effect of in Vitro Blocking the Common Beta Chain on Cell Viability in Asthma
Effect of in Vitro Blocking the Common Beta Chain on the Function of Blood, Bone Marrow and Sputum Cells Collected From Asthmatic Donors.
연구 개요
상세 설명
The experiments will use sputum samples induced from subjects with mild asthma, undergoing allergen inhalation challenges. In general, each sample will be composed of >10% neutrophils and >10% macrophages. Samples collected pre-allergen will have a low frequency of eosinophils and lymphocytes (<1%), however the percentage of eosinophils will increase to approximately 12% following allergen challenges. The sputum samples will be processed in DPBS (without dithiothreitol), and the cell suspension will be adjusted to 1 million cells/ml in DMEM with penicillin and streptomycin. A cytospin will be made for differential cell counts. The mixed cell population at 5 million cells/ml will be incubated for 48 hours at 37 degrees Celcius ± β-chain MAb at a concentration of 100 mcg/ml. After 48 hours the cell culture medium will be removed for assay of cytokines and chemokines by ELISA. Cells will be resuspended in PBS and Binding Buffer (BD Pharmingen, Cat no. 556454),stained for assessments by flow cytometry, and analyzed in duplicate.
Experiments will use blood (80 ml) and bone marrow aspirates (5ml) from atopic asthmatics taken pre and 24hr post allergen challenge. Methylcult micro-culture colonogenic assays will be performed to enumerate outgrowth of Eo/Baso-CFU and GM-CFU from CD34+ cells populations collected from the blood and bone marrow samples. Methylcult assays will be performed with CD34+ enriched cell populations in the presence of IL-5,IL-3 and GM-CSF +/- CSL311. Following 14 days culture, colonies will be enumerated.
연구 유형
등록 (실제)
연락처 및 위치
연구 장소
-
-
Ontario
-
Hamilton, Ontario, 캐나다, L8N 3Z5
- McMaster University Medical Center
-
-
참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
설명
Inclusion Criteria:
- Male and female volunteers 18 through 65 years of age.
- General good health
- Mild to moderate, stable, allergic asthma
- History of episodic wheeze and shortness of breath; FEV1 at baseline at least 70% of the predicted value
- Able to understand and give written informed consent and has signed a written informed consent form approved by the investigator's REB
- Positive methacholine challenge
- Positive skin-prick test to common aeroallergens (including cat, dust mite, grass, pollen)
- Positive allergen-induced airway bronchoconstriction (a fall in FEV1 of at least 20% from baseline)
Exclusion Criteria:
- A worsening of asthma or a respiratory tract infection within 6 weeks preceding study entry
- Use of corticosteroids, immunosuppressives, anticoagulants (warfarin or heparin) within 28 days prior to randomization into the study
- Use of nonsteroidal anti-inflammatory drugs (NSAIDs) within 48 hours of dosing or aspirin with 7 days of dosing
- Have chronic use of any other medication for treatment of allergic lung disease other than short- and intermediate-acting ß2-agonists or ipratropium bromide
- Use of caffeine-containing products or medications for 12 hours or alcohol or over the counter drugs including aspirin, cold and allergy medications for 48 hours or inhaled bronchodilators for 8 hours prior to methacholine and allergen challenges
- Use of tobacco products of any kind currently or within the previous 12 months, or smoking history > 10 pack years.
- Lung disease other than mild to moderate allergic asthma
- Unwillingness or inability to comply with the study protocol for any other reason.
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 관찰 모델: 보병대
- 시간 관점: 유망한
코호트 및 개입
그룹/코호트 |
개입 / 치료 |
---|---|
Allergen challenge
Determination of the effects of a β-chain monoclonal antibody (MAb) on the function of cells naturally activated by in vivo allergen exposure, from donors with allergen-induced asthma
|
Allergen extract is administered by inhalation.
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
---|---|---|
Sputum Collection
기간: 7 hours post allergen
|
Three baseline sample collections will ensure sufficient numbers of cells are collected for proposed outcomes.
Post allergen cells will be examined at time points when these populations are known to be at their highest frequency.
|
7 hours post allergen
|
공동 작업자 및 조사자
협력자
수사관
- 수석 연구원: Gail M Gauvreau, PhD, Hamilton Health Sciences Corporation
간행물 및 유용한 링크
유용한 링크
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (실제)
연구 완료 (실제)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
기타 연구 ID 번호
- Bc in vitro study
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .