PMID- 31567736 OWN - NLM STAT- MEDLINE DCOM- 20200803 LR - 20211204 IS - 1473-6527 (Electronic) IS - 0951-7375 (Linking) VI - 32 IP - 6 DP - 2019 Dec TI - BK polyomavirus-specific antibody and T-cell responses in kidney transplantation: update. PG - 575-583 LID - 10.1097/QCO.0000000000000602 [doi] AB - PURPOSE OF REVIEW: BK polyomavirus (BKPyV) has emerged as a significant cause of premature graft failure after kidney transplantation. Without effective antiviral drugs, treatment is based on reducing immunosuppression to regain immune control over BKPyV replication. The paradigm of high-level viruria/decoy cells, BKPyV-DNAemia, and proven nephropathy permits early interventions. Here, we review recent findings about BKPyV-specific antibody and T-cell responses and their potential role in risk stratification, immune monitoring, and therapy. RECENT FINDING: Kidney transplant recipients having low or undetectable BKPyV-specific IgG immunoglobulin G (IgG) are higher risk for developing BKPyV-DNAemia if the donor has high BKPyV-specific IgG. This observation has been extended to neutralizing antibodies. Immunosuppression, impaired activation, proliferation, and exhaustion of BKPyV-specific T cells may increase the risk of developing BKPyV-DNAemia and nephropathy. Clearance of BKPyV-DNAemia was correlated with high CD8 T cell responses to human leukocyte antigen (HLA)-types presenting BKPyV-encoded immunodominant 9mers. For clinical translation, these data need to be assessed in appropriately designed clinical studies, as outlined in recent guidelines on BKPyV in kidney transplantation. SUMMARY: Evaluation of BKPyV-specific immune responses in recipient and donor may help to stratify the risk of BKPyV-DNAemia, nephropathy, and graft loss. Future efforts need to evaluate clinical translation, vaccines, and immunotherapy to control BKPyV replication. FAU - Kaur, Amandeep AU - Kaur A AD - Department Biomedicine, Transplantation and Clinical Virology, University of Basel. FAU - Wilhelm, Maud AU - Wilhelm M AD - Department Biomedicine, Transplantation and Clinical Virology, University of Basel. FAU - Wilk, Sabrina AU - Wilk S AD - Department Biomedicine, Transplantation and Clinical Virology, University of Basel. FAU - Hirsch, Hans H AU - Hirsch HH AD - Department Biomedicine, Transplantation and Clinical Virology, University of Basel. AD - Clinical Virology, Laboratory Medicine. AD - Infectious Diseases and Hospital Epidemiology, University Hospital Basel, Basel, Switzerland. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Curr Opin Infect Dis JT - Current opinion in infectious diseases JID - 8809878 RN - 0 (Antibodies, Viral) SB - IM MH - Antibodies, Viral/*immunology MH - Antibody Specificity/immunology MH - BK Virus/*immunology MH - Host-Pathogen Interactions/*immunology MH - Humans MH - Immunocompromised Host MH - Immunosuppression Therapy/adverse effects MH - Infection Control MH - Kidney Transplantation/*adverse effects MH - Polyomavirus Infections/*diagnosis/*etiology/metabolism/therapy MH - T-Lymphocytes/*immunology/metabolism MH - Transplant Recipients EDAT- 2019/10/01 06:00 MHDA- 2020/08/04 06:00 CRDT- 2019/10/01 06:00 PHST- 2019/10/01 06:00 [pubmed] PHST- 2020/08/04 06:00 [medline] PHST- 2019/10/01 06:00 [entrez] AID - 10.1097/QCO.0000000000000602 [doi] PST - ppublish SO - Curr Opin Infect Dis. 2019 Dec;32(6):575-583. doi: 10.1097/QCO.0000000000000602.