Effect of Autologous Cord Blood Mononuclear Cells for Prevention of Bronchopulmonary Dysplasia or Death in Extremely Preterm Neonates: a Placebo-controlled Randomized Multicenter Trial
试验速览
- 阶段
- 3 期
- 状态
- 招募中
- 发起方
- 入组人数
- 140
- 试验地点
- 2
- 主要终点
- frequency of bronchopulmonary dysplasia or death
研究概览
简要总结
This is the first and largest randomized, controlled, blinded trial that evaluates the efficacy of autologous cord blood mononuclear cells infusion as a prevention therapy for BPD or death. The results of this trial will provide valuable clinical evidence for recommendations on the management of BPD in extremely preterm infants. In this prospective, randomized controlled double-blind multi-center clinical trial, 140 extremely preterm neonates less than 28 weeks are randomly assigned to receive intravenous autologous cord blood mononuclear cells infusion (targeted dose of 5×107cells/kg but no less than 1×107cells/kg) or placebo ( normal saline) within 24 hours after birth in a 1:1 ratio using a central randomization system. The primary outcome is survival without bronchopulmonary dysplasia at 36 weeks of postmenstrual age or discharge home. The secondary outcomes will include mortality rate, BPD severity, other common preterm complication rate, respiratory support duration, the length and cost of hospitalization and long term outcomes after two years follow up post infusion.
详细描述
Study design and settings:
This present study will be a randomized, placebo-controlled, double-blinded, multi-center trial to be conducted at 12 medical centers in tertiary hospitals with Neonatal Intensive Care Unit that were selected by the expert committee. A total of 140 neonates fulfilling the eligibility criteria will be enrolled. Subsequently, the participants will be randomly divided into two groups (ACBMNC infusion group and control (placebo) group ) in a ratio of 1:1.
Sample size:
Based on our previous study and others' study, we found the ACBMNC infusion was effective in reducing respiratory support duration in preterm infants. The rate of BPD among extremely preterm infants in our NICU was 60% (pA). What we expect to be an intended (or at least acceptable) effect of the ACBMNC infusion is 25 % reduction in frequency of BPD(pB:35%). To detect this difference with a sensitivity of 80% and an error probability of 5%, at least 59 patients per randomization group will be required using the following formula:
n=(pA(1-pA)/κ+pB(1-pB))((z1-α/2+z1-β)/(pA-pB))2 To account for the possibility of as high as 20% loss to follow-up, our estimated sample size is 140 cases totally.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Triple (Participant, Care Provider, Outcomes Assessor)
盲法说明
A hospital ethics committee reviewed the study data during the trials. None of them were involved in the study or aware of the treatment-group assignments of the infants. Only nurses and physicians staff conducted the infusion were aware of the treatment assignment, and these individuals had no contact with the staff who collected and analyzed the patients data. The parents are not aware of the assignment. This study is double-blinded.
入排标准
- 年龄范围
- 0 Weeks 至 28 Weeks（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Infants fulfilling all the following inclusion criteria will be enrolled in this trial:
- •born at study hospital;
- •singleton birth;
- •less than 28 weeks GA 4.Signed informed consent obtained;
- •had available umbilical cord blood (UCB).
排除标准
- •Those infants are excluded if they were
- •with severe congenital abnormalities; 2.with maternal clinical chorioamnionitis
- •the mother was positive for hepatitis B (HBsAg and/or HBeAg) or C virus (anti-HCV), syphilis, HIV (anti-HIV-1 and -2) or IgM against cytomegalovirus, rubella, toxoplasma and herpes simplex virus.
结局指标
主要结局
frequency of bronchopulmonary dysplasia or death
时间窗: 36 weeks of postmenstrual age or discharge home whichever comes first.
The frequency of bronchopulmonary dysplasia or death at 36 weeks of postmenstrual age or discharge home whichever comes first.
次要结局
- mortality(36 weeks of postmenstrual age or the discharge)
研究者
yang jie
Professor
Guangdong Women and Children Hospital