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Cell Mediated Immunity With Risk of Cytomegalovirus (CMV) in Solid Organ Transplant Recipients (ViracorCMI)

2013年4月3日更新者：Michael Ison

A Study to Correlate CMV-Specific Cell Mediated Immunity With Risk of CMV Disease and With Clinical Response to Therapy Following Solid Organ Transplantation

Cytomegalovirus (CMV) is a common infection with 60-90% of all adults worldwide having evidence of having the infection at sometime in their life. Patients who have undergone transplantation are at risk at developing CMV, especially those patients who do not have antibodies to CMV pre-transplant, but received an organ from a recipient who has antibodies to CMV. Usually the disease CMV causes is mild and sometimes patients are not even aware they have the infection without tests to detect the virus. CMV can less commonly cause serious infections that affect many parts of the body including the intestines, liver, or lungs. In rare cases CMV infection in transplant patients can cause death.

All patients who receive a transplant are monitored for CMV infection. The purpose of this study is to determine if there is a way the investigators can determine in advance which patients are at greatest risk of CMV infection. Specifically, this study will analyze the immune system of transplant patients to determine if there are specific elements of the immune system that 1) helps protect the body against CMV infection, and 2) helps the body combat CMV once it is infected. Identifying these specific elements of the immune system could improve the physician's ability to monitor the SOT patients for CMV infection, and to help treat CMV in those patients that become infected.

研究概览

地位

完全的

条件

详细说明

Our hypothesis is that the degree of CMV cell-mediated immune (CMI) response correlates inversely with the risk of development of CMV replication and correlates with the response to initial therapy and risk of relapse after onset of replication. The primary aim of this study is to determine an association between CMV CMI response and both the risk of CMV infection and the degree of initial CMV viremia and rate of viremia clearance with standard CMV therapy. The first secondary aim is to determine an association between CMV QnPCR, CMV microRNA expression, TLR2 expression, and CMV-specific CMI and the risk of relapse of CMV disease after initial treatment. The second secondary aim is to determine an association between CMV QnPCR, CMV microRNA expression, TLR2 expression, and CMV-specific CMI collected at CMV infection and the following prospective data: Development of CMV end organ disease, resolution of symptoms of CMV infection, other non-CMV infections after initial CMV infection, graft rejection, recurrent or resistant CMV infection, and other markers of immune function. The third secondary aim is to determine an association between CMV QnPCR, CMV microRNA expression, TLR2 expression, and CMV-specific CMI response collected at CMV infection in solid-organ transplant (SOT) recipients and the following retrospective data: Type of SOT, CMV donor/recipient status, type and degree of immunosuppression, type and length of CMV prophylaxis, prior graft rejection and infections (non-CMV).

研究类型

观察性的

注册 (实际的)

113

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习地点

美国
- Illinois
  - Chicago、Illinois、美国、60611
    - Northwestern Memorial Hospital

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

18年及以上 (成人、年长者)

接受健康志愿者

不

有资格学习的性别

全部

取样方法

概率样本

研究人群

The main study will recruit adult solid organ transplant recipients at Northwestern Memorial Hospital who are CMV donor positive, recipient negative (D+/R-) and SOT recipients at NMH who are CMV recipient positive, irrespective of donor status (D±/R+). A sub-study of this study will enroll up to 50 adult SOT recipients who have quantifiable CMV DNA by PCR and require CMV antiviral therapy, irrespective of their participation in the main study. Patients will be identified prior to transplantation as part of the pre-transplant evaluation process and will be consented either pre-transplant or on the first post-operative day in which they can provide written consent.

描述

Inclusion Criteria:

Main Study Subjects will be recruited if they are listed for a SOT (liver, liver-kidney, kidney, kidney-pancreas, cardiac). At the time of transplant, consented patients will have an immediate pre-transplant blood draw for baseline labs subsequent labs will only be drawn if the donor/recipient CMV serostatus is CMV D+/R- (up to a maximum of 50 subjects) or D+/R+ or D-/R+ (up to a maximum of 50 subjects). Subjects must be ≥ 18 years of age, be consentable, and agree to have laboratory and clinical follow-up at Northwestern.
CMV Replication Substudy
Subjects will be recruited if they have undergone SOT, are found to have a positive CMV QnPCR (> 600 copies/mL) and will be subsequently treated for CMV infection with either intravenous ganciclovir or oral valganciclovir therapy at the discretion of the treating provider. Subjects must be ≥ 18 years of age, able to give consent, and agree to have laboratory and clinical follow-up at Northwestern.

Exclusion Criteria:

Subjects will be excluded if they have had a previous history of CMV infection after SOT prior to enrollment (a prior episode of CMV infection or replication prior to the onset of the current episode). Subjects will also be excluded if the subject cannot give informed consent or if the subject is not able to comply with follow-up testing and/or treatment.

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

团体/队列数

队列和干预

团体/队列
Main study Main study patients are enrolled before or at time of solid organ transplant. Qualifying subjects either have tested positive for Cytomegalovirus or have a donor who has tested positive for Cytomegalovirus.
Sub study Subjects are enrolled to this arm who have begun replicating Cytomegalovirus post transplant. These subjects may or may not have been on the main study arm.

研究衡量的是什么？

主要结果指标

结果测量	措施说明	大体时间
Assessment of CMV Cell-Mediated Immune Response 大体时间：For 8 months after transplant or 4 months after clearance of CMV	Association between CMV CMI response and both the risk of CMV infection and the degree of initial CMV viremia and rate of viremia clearance with standard CMV therapy	For 8 months after transplant or 4 months after clearance of CMV

次要结果测量

结果测量	措施说明	大体时间
Assessment of CMV QnPCR, CMV microRNA expression, TLR2 expression, and CMV-specific CMI 大体时间：For 8 months after transplant or 4 months after clearance of CMV	Association between CMV QnPCR, CMV microRNA expression, TLR2 expression, and CMV-specific CMI collected at CMV infection and the following prospective data: Development of CMV end organ disease Resolution of symptoms of CMV infection Other non-CMV infections after initial CMV infection Graft rejection Recurrent or resistant CMV infection Other markers of immune function Type of SOT CMV donor/recipient status Type and degree of immunosuppression Type and length of CMV prophylaxis Prior graft rejection and infections (non-CMV)	For 8 months after transplant or 4 months after clearance of CMV

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Michael Ison

合作者

ViraCor Laboratories

调查人员

首席研究员：Michael G Ison, MD,MS、Northwestern University

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始

2010年4月1日

初级完成 (实际的)

2011年12月1日

研究完成 (实际的)

2012年3月1日

研究注册日期

首次提交

2012年3月14日

首先提交符合 QC 标准的

2012年3月16日

首次发布 (估计)

2012年3月20日

研究记录更新

最后更新发布 (估计)

2013年4月5日

上次提交的符合 QC 标准的更新

2013年4月3日

最后验证

2013年4月1日