Effects of Tobacco Smoke Exposure on Epigenetic Signatures and Immunotoxicological Reactions
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 100
- 主要终点
- Change from Baseline in cotinine level at 3 months
研究概览
简要总结
Researchers have noted that active smoke exposure was possibly related to epigenetic mechanism,and may further influence reactive immunotoxicological reaction on human beings. Some studies have been reported that smoking reduction would decrease the prevalence of respiratory symptoms and urinary cotinine level, but the underlying epigenetic mechanism and the functional changes of immunotoxicological system were still unclear. We plan to examine the causal relationship between smoking reduction and alterations in epigenetic signatures/immunotoxicological reactions. Teenager Smoking Reduction Trial (TSRT) will be population-based trial among teenagers. Eligible teenagers will be recruited in Taipei City and urinary cotinine level will be used to monitor the exposure status of active smoking at baseline, 1-month and 3-month of the intervention process. We will assess the potential change in immunotoxicological markers, including Th1/Th2 cytokines and clinical immunological measurements, before and after the intervention program. Furthermore, whole-genome methylation and miRNA expression microarrays will be used to search candidate genes for teenager smoking exposure. We plan to develop a prediction model for immunotoxicological reaction by utilizing epigenetic signature data from microRNA expression and DNA methylation profiles based on machine learning methodologies. We will also establish a personalized epigenetic prediction model for allergy development and build the risk assessment platform for immunotoxicological reaction under tobacco smoke exposure. Finally, we will examine the causal relationship between epigenetic signatures and immunotoxicological reactions under an independent children's cohort.
详细描述
Teenager Smoking Reduction Trial (TSRT)
- Study subjects
TSRT is a solution-oriented trial aiming to evaluate the effectiveness of tobacco smoke reduction among teenagers. Eligible teenagers will fit the following criteria: (a) age between 12 and 16 years old; (b) have active smoke habits in past 6 months; (c) amount of smoke exceed 10 cigarettes per week. The subjects will be recruited from our previous database for schoolchildren. Telephone interview will be used to screen the eligibility for the teenagers. Recruitment will occur over 3-month period from 2011 April to June. The procedure for TSRT is showed in figure 2. In this plan, we will recruit at least 31 asthmatic children and 31 non-asthmatic children who have active smoke habits. 2. Data collection
A baseline data and at the 1-month and 2-month follow-up visits, the primary caregiver provided data by personal interview on parents reports. The demographic information in questionnaires included age, gender, level of education.
Teenagers will report the frequency of cigarette smoking by using a structured questionnaire. The definition of tobacco smoke exposure including: (a) ''Do you currently smoke?''-yes/no; (b) ''When did you begin to smoke regularly?''; (c) Smokers were also asked for the number of cigarettes they smoked on an average day. Nicotine dependence will be examined by using structure questionnaires from Fagerstrom model.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Single Group
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 12 Years 至 16 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •(1) age between 12 and 16 years old; (2) Child had active smoking habit; and (3) have prior history of smoking habit.
排除标准
- •We will exclude children who do not fit in with the inclusion criteria.
研究组 & 干预措施
Lifestyle counseling
Both the parents and children will receive 8 times intervention program weekly in first session. The telephone counseling will reduce the child's tobacco smoke exposure every weekly in second session. The interventionist and child jointly select behavioral goals for reducing tobacco smoke exposure for the child to work toward. The goals will be formalized as a written smoke exposure reduction plan for any of four specific behaviors, as relevant to that family: (a) smoking cessation for the child, (b) making the child's primary home smoke-free, (c) making non-home locations smoke-free.
干预措施: Tobacco smoke reduction trial intervention program (Behavioral)
结局指标
主要结局
Change from Baseline in cotinine level at 3 months
时间窗: 3 month
Cotinine was the major proximate metabolite of nicotine,has been widely used as a biomarker of tobacco exposure. We will detect the urinary cotinine for children who had active smoking habit.
Change from Baseline in smoking status at 3 months
时间窗: 3 months
The smoking status for children will be measure by structure questionnaire.
次要结局
- Change from Baseline in immunological function at 3 months(3 months)
- Change from Baseline in DNA methylation at 3 months(3 months)
- Change from Baseline in immunological cytokine at 3 months(3 months)
- Change from Baseline in miRNA expression at 3 months(3 months)