The specific goal is to test the hypotheses that messenger RNA expression profiles (mRNA profiles) and microRNA expression profiles (miRNA profiles) of urinary cells/peripheral blood cells/ renal allograft biopsies are predictive and diagnostic of acute rejection, subclinical acute rejection, and chronic allograft nephropathy (CAN) in renal allograft recipients randomized to either a low dose or a standard dose tacrolimus regimen.
Specific Aim 1 : To evaluate the prognostic utility of urinary cell/peripheral blood cell/allograft biopsy mRNA/miRNA profiles, measured at the time of randomization, for predicting the subsequent development of (i) clinical acute rejection;(ii) subclinical acute rejection and (iii) CAN.
Specific Aim 2 : To determine whether renal allograft recipients randomized to a low tacrolimus regimen exhibit a different longitudinal pattern of mRNA/miRNA profiles in urinary cells/peripheral blood cells compared to recipients randomized to a standard tacrolimus regimen.
Specific Aim 3 : To evaluate the diagnostic utility of urinary cell/peripheral blood cell/ allograft biopsy mRNA/miRNA profiles for the diagnosis of subclinical acute rejection or CAN. The study cohort for the proposed study will be 160 renal allograft recipients enrolled in our single center randomized controlled trial (RCT) comparing a low tacrolimus regimen (target trough level: 3.0 to 5.0ng/ml) with a standard tacrolimus regimen (6.0-8.0ng/ml). Randomization will occur at 3 months post-transplantation and the subjects will undergo protocol renal allograft biopsy at the time of randomization and at 12 and 33 months post-randomization. The RCT is supported by the combination of a NIH- Clinical and translational award to Weill Cornell, industry, and institutional funds and no funds are requested for the performance of RCT in this application. This mRNA/miRNA profiling study leverages the RCT and the proposed research may lead to the development of noninvasive and mechanistically informative molecular biomarkers for the safe minimization of immunosuppressive therapy in organ graft recipients.
The use of immunosuppressive drugs is associated with an excess of infections, malignancy and cardiovascular and metabolic aberrations in organ graft recipients. Thus, immunosuppression minimization is a major goal in organ transplantation. We propose to develop gene-based diagnostic tests for guiding the minimization of immunosuppressive therapy in organ graft recipients.
|Muthukumar, Thangamani; Lee, John R; Dadhania, Darshana M et al. (2014) Allograft rejection and tubulointerstitial fibrosis in human kidney allografts: interrogation by urinary cell mRNA profiling. Transplant Rev (Orlando) 28:145-54|
|Lee, John R; Muthukumar, Thangamani; Dadhania, Darshana et al. (2014) Urinary cell mRNA profiles predictive of human kidney allograft status. Immunol Rev 258:218-40|
|Lee, John R; Muthukumar, Thangamani; Dadhania, Darshana et al. (2014) Gut microbial community structure and complications after kidney transplantation: a pilot study. Transplantation 98:697-705|
|Matignon, Marie; Ding, Ruchuang; Dadhania, Darshana M et al. (2014) Urinary cell mRNA profiles and differential diagnosis of acute kidney graft dysfunction. J Am Soc Nephrol 25:1586-97|
|Lee, John R; Dadhania, Darshana; August, Phyllis et al. (2014) Circulating levels of 25-hydroxyvitamin D and acute cellular rejection in kidney allograft recipients. Transplantation 98:292-9|
|Suthanthiran, Manikkam; Schwartz, Joseph E; Ding, Ruchuang et al. (2013) Urinary-cell mRNA profile and acute cellular rejection in kidney allografts. N Engl J Med 369:20-31|
|Muthukumar, Thangamani; Afaneh, Cheguevara; Ding, Ruchuang et al. (2013) HIV-infected kidney graft recipients managed with an early corticosteroid withdrawal protocol: clinical outcomes and messenger RNA profiles. Transplantation 95:711-20|
|Dadhania, Darshana; Snopkowski, Catherine; Muthukumar, Thangamani et al. (2013) Noninvasive prognostication of polyomavirus BK virus-associated nephropathy. Transplantation 96:131-8|
|Dadhania, Darshana; Snopkowski, Catherine; Ding, Ruchuang et al. (2010) Validation of noninvasive diagnosis of BK virus nephropathy and identification of prognostic biomarkers. Transplantation 90:189-97|
|Afaneh, Cheguevara; Muthukumar, Thangamani; Lubetzky, Michelle et al. (2010) Urinary cell levels of mRNA for OX40, OX40L, PD-1, PD-L1, or PD-L2 and acute rejection of human renal allografts. Transplantation 90:1381-7|
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