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TReg, CD4 Tem, and CD8 Temra fail to predict acute cellular rejection in living-donor renal allograft recipients

Walters, John (2016) TReg, CD4 Tem, and CD8 Temra fail to predict acute cellular rejection in living-donor renal allograft recipients. Master's Thesis, University of Pittsburgh. (Unpublished)

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Since it was pioneered successfully, renal transplantation remains the only option for patients with stage-5 chronic, severe, and end-stage renal disease for whom dialysis treatment complications preclude its continued use. Currently, and historically, the supply of suitable living-donor allografts is far less than their clinical need, and this gap cannot be offset by transplanting available cadaveric kidneys. Immuno-suppressive and -induction therapies have been used to impair the recipients’ immune response against the allograft. Without such therapies many recipients’ immune systems would reject the organ, causing the patient to again experience renal failure. It is therefore incumbent upon the public health community to ascertain the most effective treatment modality for transplanted organs to ensure that these limited resources are utilized in the most efficient manner possible.
Thymoglobulin and Basiliximab induction therapies are two induction treatments available clinically for kidney transplantation. Within this study, patients undergoing treatment using either of these induction-agents had their circulating T cell phenotypes analyzed and compared. The goal of this study was to produce a statistical model, based on Generalized Estimating Equation methodology, that would predict episodes of acute cellular rejection (ACR) between the day of the transplant and up to one year after transplantation. The selection of potential covariates was based upon previously identified T cell markers.
Due to small sample size, missing data, and both left- and right-truncation of the data, the model was not able discriminate between patients that underwent ACR from those that did not based upon the a priori markers of interest. However, the analysis did identify different memory T cell proportions that may be predictive of ACR in patients treated with Thymoglobulin or Basiliximab and warrants further study. The public health impact of a predictive model would be to increase the quality and duration of life in individual patients and reduce the burden of End Stage Renal Disease (ESRD) within the US population as a whole.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Walters, Johnwalters.johnt@gmail.comJTW4
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairBuchanich, Jeanine
Committee MemberMetes,
Committee MemberYouk, Ada
Date: 30 November 2016
Date Type: Publication
Defense Date: 2 December 2016
Approval Date: 30 November 2016
Submission Date: 18 July 2016
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 50
Institution: University of Pittsburgh
Schools and Programs: School of Public Health > Biostatistics
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Renal Kidney Transplant Thymoglobulin Basiliximab GEE Generalized Estimating Equations Acute Cellular Rejection ACR
Date Deposited: 30 Nov 2016 14:05
Last Modified: 25 Feb 2017 06:15


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