Role of the Isomerase Pin-1 in the Development and Treatment of Asthma
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 14
- 试验地点
- 1
- 主要终点
- Change From Baseline in the Percentage of Total White Blood Cell That Were Eosinophils at 48 Hours
研究概览
简要总结
Pin1 is activated in asthmatic airways, increasing cytokine mRNA stability and eosinophil survival. This study is designed to test whether the Pin1 enzyme regulates TLR/IL-1R signal pathways in multiple cells in asthma.
详细描述
The investigators will test their hypothesis that Pin1 regulates TLR/IL-1R signaling pathways in asthma by examining Pin1 and related pathway activation in BAL-derived eosinophils after house dust mite allergen challenge. The investigators will perform segmental allergen challenge. BAL and lung biopsy of the allergen-challenged segments will be performed 48 hr later and activation of Pin1 and related pathways will be examined.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 55 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Subjects 18-55 years of age, diagnosed with asthma for at least 1 year;
- •And FEV1 > 70% predicted on only short acting beta agonists e.g albuterol
- •And methacholine PC20 < 8 mg/ml
- •Positive skin prick test to Dermatophagoides pteronyssinus(DerP)
- •No prior history of intubation for asthma
- •No use of inhaled corticosteroids for 1 month prior to entry
排除标准
- •Current smoking or smoking history of greater than 10 pack-years
- •Any other clinically important comorbidity determined by the principal investigator to affect subject safety, including uncontrolled diabetes, uncontrolled coronary artery disease, acute or chronic renal failure, and uncontrolled hypertension that would increase the risk of significant adverse events during bronchoscopy,
- •Worsening of asthma symptoms requiring treatment with steroids within 4 weeks of screening
- •Respiratory infection within four weeks
- •Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant or who are currently pregnant or lactating.
- •Unless they:
- •Are women whose career, lifestyle, or sexual orientation precludes intercourse with a male partner
- •Are women whose partners have been sterilized by vasectomy or other means
- •Use one acceptable birth control method. Adequate barrier methods of contraception include: diaphragm, condom (by the partner), intrauterine device (copper or hormonal), sponge or spermicide. Hormonal contraceptives include any marketed contraceptive agent that includes an estrogen and/or a progestational agent.
- •Pre-existing lung disease other than asthma
- •History of coagulation disorders or abnormal PT/PTT testing at screening
- •History of immunodeficiency diseases, including HIV
- •A disability that may prevent the patient from completing all study requirements
- •Use of other investigational drugs at the time of enrollment, or within 30 days or 5 half-lives of enrollment, whichever is longer
- •History of malignancy of any organ system (other than localized basal cell carcinoma of the skin), treated or untreated, within the past 5 years, regardless of whether there is evidence of local recurrence or metastases.
- •Diagnosis of Hepatitis B or C.
- •History of alcohol abuse (as determined by the principal investigator) within 6 months of screening.
- •History of illicit drug abuse (as determined by the principal investigator) within 6 months of screening.
研究组 & 干预措施
D. pteronyssinus allergens
Single arm study exploring the role of Pin-1 enzyme in development of Asthma. Bronchoscopy before and 48 hours after installation of D. pteronyssinus allergens into the lung segments
干预措施: installation of D. pteronyssinus allergens (Biological)
结局指标
主要结局
Change From Baseline in the Percentage of Total White Blood Cell That Were Eosinophils at 48 Hours
时间窗: from baseline to 48 hours
Measure Pin1 activity in BAL-derived eosinophils after House Dust Mite (HDM) allergen challenge: Eosinophils post-challenge change from pre-challenge is reported: absolute change = \[eosinophils post (%) - eosinophils pre (%)\]
次要结局
- Percent Change From Baseline in the Percentage of Total White Blood Cell That Were Lymphocytes at 48 Hours(from baseline to 48 hours)
- Percent Change From Baseline in the Percentage of Total White Blood Cell That Were Macrophages at 48 Hours(from baseline to 48 hours)
- Change From Baseline in the Percentage of Total White Blood Cell That Were Neutrophils at 48 Hours(from baseline to 48 hours)
研究者
Elliot Israel, MD
Physician
Brigham and Women's Hospital