Study: NCT01678937

Intervention type: PROCEDURE
Intervention: Blood Draw - Rapamycin
Description: Ten calcineurin-inhibitors (CNI) monotherapy or dual therapy (CNI+MMF) patients will have blood taken (40 ml=8 tsp.) 2 wks. prior to conversion, 3-6 months post successful conversion. 1) Regulatory/Suppressor Cells (CD4+CD25+FOXP3+CD127low; and CD8+ CD28-FOXP3+CD127low cells). 2) Dendritic cell assays: myeloid vs. lymphoid (CD11c; CD123); maturation and ability to process antigens (CD83; CD205); markers shown to induce regulatory T cells (ILT3; ILT4), 3) Soluble HLA G, and 4) Liver function/drug levels. If problems develop during conversion (e.g. acute rejection, significant drug side effects) requiring discontinuation of rapamycin, MMF and/or reversion to CNI therapy, assays will not be performed. Monthly liver function/drug levels performed after successful conversion (standard of care).

Intervention type: PROCEDURE
Intervention: Blood Draw from Control Subjects
Description: Ten healthy individuals will have blood drawn (40 ml = 8 teaspoons (tsps.)).Blood will be drawn at one time point for the following:~* Dendritic cell assays: myeloid vs. lymphoid (CD11c; CD123); maturation and ability to process antigens (CD83; CD205); markers that have been shown to induce regulatory T cells (ILT3; ILT4).~* Regulatory/Suppressor Cells (CD4+CD25+FOXP3+CD127low; and CD8+ CD28- FOXP3+CD127low cells).~* HLA microchimerism \& HLA G

Intervention type: PROCEDURE
Intervention: Blood Draw - CyA
Description: Blood drawn from 10 patients on cyclosporine (CyA) (40 ml = 8 tsp.)). Blood will be drawn at one time point for the following:~* Dendritic cell assays: myeloid vs. lymphoid (CD11c; CD123); maturation and ability to process antigens (CD83; CD205); markers that have been shown to induce regulatory T cells (ILT3; ILT4).~* Regulatory/Suppressor Cells (CD4+CD25+FOXP3+CD127low; and CD8+ CD28- FOXP3+CD127low cells).~* HLA microchimerism \& HLA G

Intervention type: PROCEDURE
Intervention: Blood Draw - Tacrolimus
Description: Blood drawn from 5 patients on Tacrolimus (40 ml = 8 tsp.) at one time point for the following:~* Dendritic cell assays: myeloid vs. lymphoid (CD11c; CD123); maturation and ability to process antigens (CD83; CD205); markers that have been shown to induce regulatory T cells (ILT3; ILT4).~* Regulatory/Suppressor Cells (CD4+CD25+FOXP3+CD127low; and CD8+ CD28- FOXP3+CD127low cells).~* HLA microchimerism \& HLA G

Intervention type: PROCEDURE
Intervention: Blood Draw - MMF
Description: Blood will be drawn from 10 patients on mycophenolate mofetil (MMF) (40 ml or the equivalent of 8 teaspoons). Blood will be drawn at one time point for the following analysis:~* Dendritic cell assays: myeloid vs. lymphoid (CD11c; CD123); maturation and ability to process antigens (CD83; CD205); markers that have been shown to induce regulatory T cells (ILT3; ILT4).~* Regulatory/Suppressor Cells (CD4+CD25+FOXP3+CD127low; and CD8+ CD28- FOXP3+CD127low cells).~* HLA microchimerism \& HLA G

Intervention type: PROCEDURE
Intervention: Blood Draw - Rapamycin
Description: Blood drawn from 10 patients on rapamycin (40 ml = 8 tsp.)) at one time point for the following:~* Dendritic cell assays: myeloid vs. lymphoid (CD11c; CD123); maturation and ability to process antigens (CD83; CD205); markers that have been shown to induce regulatory T cells (ILT3; ILT4).~* Regulatory/Suppressor Cells (CD4+CD25+FOXP3+CD127low; and CD8+ CD28- FOXP3+CD127low cells).~* HLA microchimerism \& HLA G