Effect of ALlopurinol in Addition to Hypothermia for Hypoxic-ischemic Brain Injury on Neurocognitive Outcome - a Blinded Randomized Placebo-controlled Parallel Group Multicenter Trial for Superiority (Phase III)
试验速览
- 阶段
- 3 期
- 状态
- 招募中
- 入组人数
- 760
- 试验地点
- 12
- 主要终点
- death versus severe neurodevelopmental impairment versus survival without severe neurodevelopmental impairment
研究概览
简要总结
Neonatal hypoxic-ischemic encephalopathy (HIE) is a major cause of death or long-term disability in infants born at term in the western world, affecting about 1-4 per 1.000 life births and consequently about 5-20.000 infants per year in Europe.
Hypothermic treatment became the only established therapy to improve outcome after perinatal hypoxic-ischemic insults. Despite hypothermia and neonatal intensive care, 45-50% of affected children die or suffer from long-term neurodevelopmental impairment. Additional neuroprotective interventions, beside hypothermia, are warranted to further improve their outcome.
Allopurinol is a xanthine oxidase inhibitor and reduces the production of oxygen radicals and brain damage in experimental, animal, and early human studies of ischemia and reperfusion.
This project aims to evaluate the efficacy and safety of allopurinol administered immediately after birth to near-term infants with HIE in addition to hypothermic treatment.
详细描述
During labour and childbirth various events (such as placental abruption, uterine rupture, umbilical cord complications etc.) may result in impaired oxygenation and/or perfusion of the newborn brain which may result in brain injury termed "hypoxic-ischemic encephalopathy" (HIE). HIE is associated with development of long-term motor, cognitive, and neurosensory and memory disability and is one of the fundamental problems in perinatal medicine affecting about 5,000-20,000 infants/year in Europe (or 1-4/1000 live births in western societies) and approximately 1 million infants/year worldwide.
In term infants with perinatal asphyxia and postnatal HIE, brain injury predominantly originates in the immediate perinatal period (in contrast to a more distant prenatally acquired brain injury) as indicated by the lack of already established brain injury on early postnatal MRI. Consequently, brain injury in this population may potentially be ameliorated by postnatal pharmacological interventions.
The most common motor disability resulting from HIE is "cerebral palsy", the other major adverse outcome is cognitive disability, which prevents affected patients to lead their lives independently (without assistance and/or financial support).
The single major cause of HIE is a perinatal hypoxic/ischemic event (perinatal asphyxia). This hypoxic insult can cause immediate (necrosis) and delayed death (apoptosis) of (especially neuronal) cells, the latter responsible for a substantial amount of HIE-associated permanent brain damage. Whereas no intervention is known to prevent necrosis, the delayed cell death by apoptosis can be reduced by therapeutic interventions: Apoptosis is in part caused by secondary energy failure which can be reduced by hypothermic treatment.
Apoptosis is also caused by xanthine oxidase-mediated production of cytotoxic oxygen radicals during reperfusion, and there is evidence that allopurinol, a xanthine-oxidase inhibitor, reduces delayed cell death in animal models of perinatal asphyxia and ischemia/reperfusion.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- — 至 45 Minutes（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
研究组 & 干预措施
Allopurinol
Allopurinol, powder for injection (PFI), administered in two doses. First dose (20 mg/kg in 2ml/kg sterile water for injection) given as soon as intravenous access is established and no later than 30min postnatally and second dose (10mg/kg in 1ml/kg sterile water for injection) 12 hours thereafter. The second dose will only be administered to in infants on therapeutic hypothermia. Infants who recover quickly and do not qualify for and hence do not undergo hypothermia will not receive a second dose. Administration will be by continuous infusion using a syringe pump over 10min through secure venous access.
干预措施: Allopurinol (Drug)
Placebo
mannitol, powder for injection (PFI), administered in two doses. First dose (20 mg/kg in 2ml/kg sterile water for injection) given as soon as intravenous access is established and no later than 30min postnatally and second dose (10mg/kg in 1ml/kg sterile water for injection) 12 hours thereafter. The second dose will only be administered to in infants on therapeutic hypothermia. Infants who recover quickly and do not qualify for and hence do not undergo hypothermia will not receive a second dose. Administration will be by continuous infusion using a syringe pump over 10min through secure venous access.
干预措施: Mannitol (Drug)
结局指标
主要结局
death versus severe neurodevelopmental impairment versus survival without severe neurodevelopmental impairment
时间窗: at the age of 24 months
Where severe neurodevelopmental impairment is defined as any of the following: cognitive or language delay defined as a cognitive-composite-score or a language-composite-score on the Bayley Scales of Infant and Toddler Development (3rd edition) \< 85 and/or cerebral palsy (CP) according to SCPE criteria \[SCPE Dev Med Child Neurol 2000\]. In case of missing Bayley III test results, Bayley II or other developmental test results or PARCA-R parent questionnaire results may substitute for the Bayley III test result in a predefined hierarchical order. Primary endpoint with three mutually exclusive responses (healthy, death, composite outcome for impairment) will be analyzed in the two treatment groups by a generalized logits model according to Bishop, Fienberg, Holland 1975 with SAS 9.4 procedure proc catmod.
次要结局
- Motor-Composite-Score (Bayley III)(at 24 months)
- Motor-Composite-Score dichotomised (Bayley III)(at 24 months)
- Language-Composite-Score (language subscale, Bayley III)(at 24 months)
- Language-Composite-Score dichotomised (language subscale, Bayley III)(at 24 months)
- Incidence of Death(at 24 months)
- Death or neurodevelopmental impairment (NDI)(at 24months)
- Incidence of CP(at 24 months)
- GMFCS-score(at 24 months)
- Cognitive-Composite-Score (cognitive subscale, Bayley III)(at 24 months)
- Cognitive-Composite-Score dichotomised (cognitive subscale, Bayley III)(at 24 months)