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6 ��g/L), sirolimus (2 mg daily, trough level 6.0 ��g/L) and prednisone (10 mg daily). Hypertension was controlled with ramipril (98/52 mmHg), but renal failure progressed. Biopsy of her native kidney (month+67) demonstrated inflammation http://www.selleckchem.com/products/epacadostat-incb024360.html with lymphocyte predominance, tubulo-interstitial atrophy, and slight fibrosis. Immunohistochemical staining for SV40 large T antigen was positive, consistent with PyVAN stage B2 (4). In addition, fibrocellular crescents with evidence of glomerulosclerosis and arteriosclerosis were seen (Figure 1). Quantitative BKV-specific PCR demonstrated viruria and viremia BKV load 9.85 and 4.85 log10 copies/mL, respectively. Immunosuppressive therapy was step-wise reduced to tacrolimus trough levels of 3.4 ��g/L, sirolimus trough levels 3.6 ��g/L and prednisone 10 mg daily. Leflunomide was added at a dose of 100 mg daily for 3 days followed by a maintenance dose of 40 mg as recommended for rheumatoid arthritis, but blood levels were not determined. Within 2 days of starting leflunomide, diarrhea developed and persisted http://www.selleckchem.com/products/MG132.html until leflunomide was discontinued 3 months later due to anemia. No other etiology was identified for the diarrhea despite a comprehensive gastrointestinal work-up including colonoscopy. A second episode of HSV stomatitis was successfully treated with valacyclovir (500 mg b.i.d. �� 14 days) while on leflunomide. The serum creatinine declined from peak levels of 237 ��mol/L and stabilized at 190 ��mol/L 1 year later (Figure 2). Serum BKV loads declined below the limit of detection ( http://www.selleck.cn/products/pfi-2.html enterotoxin B (positive control), cell media alone (negative control) or BKV-Large T antigen (LT) or capsid protein VP1 peptide libraries consisting of 15mers overlapping by 11aa (8). For a postexpansion ESA, BKV-specific T cells were expanded from PBMC in vitro as previously described (8,17). Briefly, PBMCs were plated over night in a 6-well plate. Adherent monocytes were detached and pulsed with BKV LT or VP1 peptides. After 4 h, these cells were added to nonadherent PBMCs and cocultivated for 9 days at 37�� and 5% CO2. After 9 days, postexpansion ESA was performed by re-challenging the cells with peptides to measure the response of expanded BKV-specific T cells (17). Pretransplant, BKV-VLP IgG was low positive with 0.40 OD 492 nm, whereas BKV-VLP IgM were not detectable.