EPI-STORM Cytokine Storm in Organ Donors: A Translational Study Linking Donor Epigenetic to Transplantation Success in Recipient
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 105
- 试验地点
- 4
- 主要终点
- Kidney delayed graft function
研究概览
简要总结
Kidney and liver transplantation are the treatment of choice and are often the last therapeutic option offered to patients with chronic renal and liver failure. More than 70% of kidneys and liver available for transplantation are obtained from donors following neurological death. Unfortunately, compared to living donation, transplant function, graft survival, and recipient survival are consistently inferior with kidneys and liver from neurologically deceased donors. This difference lies with the exacerbated pro-inflammatory state characteristic of deceased donors. Indeed, when neurologic death occurs, the immune system releases substances in the blood that could harm organs and particularly the liver and the kidneys. We believe that achieving a better understanding of the inflammatory processes of organ donors could be greatly informative to design future randomized controlled trial assessing the effect of personalized immunosuppressive therapy on organ donors to ultimately improve the care provided to donors so as to increase the number of organs available for transplantation and enhancing the survival of received grafts
详细描述
Severe neurological injuries, such as those observed in neurologically deceased donors, trigger a pro-inflammatory state that activates the immune system, increases vascular permeability, and recruits and activates immune cells in solid organs. The rapid and intense increase in circulating pro-inflammatory cytokines (e.g., IL-1, IL-6, TNF-α) following neurological death, has been referred to as the cytokine storm, one condition that is not seen among living donors. Interestingly, increased expression of TNF-α in the kidney and liver at the time of transplantation has been associated with reduced graft survival and acute rejection. Moreover, numerous studies have suggested that miRNA biomarkers can be targeted as diagnostic or therapeutic molecules in the field of organ transplantation. However, current models of graft injury fail to consider the epigenetic effects of physiological stressors that occurred in neurologically deceased donors. Although several biomarkers have been associated with graft dysfunction, the changes within the donor's inflammatory state, the mechanism underlying these events in donors, and the impacts on recipients are only poorly understood.
The investigators propose a multicenter prospective cohort study with the main objective of assessing the pro-inflammatory status of neurologically deceased donors by examining both miRNAs and circulatory cytokines and investigating its association with graft function in the recipient. Blood specimens will be collected at various time points in neurologically deceased liver and kidney donors in 5 organ recovery centres. The investigators hypothesize that in donors, Peak plasma concentration of pro-inflammatory cytokines and inflammatory-associated miRNAs targets (between consent and recovery) are associated with an increase in kidney delayed graft function and liver early graft dysfunction in the recipients. Considering that there is a therapeutic arsenal for treating donor cytokine storms( e.g., immunosuppressants) and that new targets based on a highly personalized mechanism could be developed we believe that the knowledge acquired in this research program will make it possible to improve the rate of livers and kidneys recovered from potential donors as well as enhance graft function in recipients.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patient admitted to the intensive care unit with a serious neurologic lesion
- •Glasgow Coma Scale score ≤ 4
- •Absence of sedation for the last 6 hours
- •Age ≥ 18 years old
排除标准
- •S. aureus bacteremia
- •Active neoplasia
- •Receiving immunosuppressive therapy (including steroids) for > 3 months
- •Specific to potential liver donors:
- •Hepatic insufficiency defined as i) INR > 1.5, ii) hepatic encephalopathy, iii) AST, ALT > 2 times normal value
- •Specific to potential kidney donors:
- •Polycystic kidney disease
- •Chronic renal failure (i.e., eGFR < 60 ml/min)
- •Phase 2 of the study:
- •Inclusion Criteria:
- •Organ donor after neurologic death (DND) declaration as determined by the attending physician
- •Consent to organ donation obtained
结局指标
主要结局
Kidney delayed graft function
时间窗: 7-days post-transplantation
Requirement for renal replacement therapy within the first 7 days following transplantation or decrease of \< 10% of creatinine after 3 days after transplantation, or creatinine \> 250 µmol/l at day 5 with evidence of delayed graft function by renal scintigraphy
次要结局
- Liver early graft dysfunction(7-days post-transplantation)
- Quantification of circulatory cytokines(From ICU admission up to organ recovery (5 timepoints(1:ICU admission; 2: consent to organ donation, 3: 4 to 8 hours after sample #2, 4: 24 hours after sample #2; 5: prior to transfer from ICU to operating room); 25 donors).)
- Identification of inflammatory-related miRNA targets using micro-transcriptome analyses(From ICU admission up to organ recovery (5 timepoints (1:ICU admission; 2: consent to organ donation, 3: 4 to 8 hours after sample #2, 4: 24 hours after sample #2; 5: prior to transfer from ICU to operating room) ;25 donors).)
- Validation of inflammatory-related miRNA targets using targeted quantification(From ICU admission up to organ recovery (5 timepoints(1:ICU admission; 2: consent to organ donation, 3: 4 to 8 hours after sample #2, 4: 24 hours after sample #2; 5: prior to transfer from ICU to operating room); 105 donors).)
- Validation of circulatory cytokines(From ICU admission up to organ recovery (5 timepoints (1:ICU admission; 2: consent to organ donation, 3: 4 to 8 hours after sample #2, 4: 24 hours after sample #2; 5: prior to transfer from ICU to operating room); 105 donors).)