title: Real-time PCR assay compared with antigenemia assay for detecting cytomegalovirus infection in kidney transplant recipients.
abstract: Human cytomegalovirus (CMV) infection is a major cause of morbidity and mortality among kidney transplant recipients. The CMVpp65 antigenemia assay has been used for preemptive therapy. Real-time polymerase chain reaction (PCR) technology for CMV DNA quantification in blood has demonstrated a good correlation with the currently employed CMV antigenemia assay. In this study, 90 renal transplant recipients were prospectively enrolled from July 2004 and May 2005. Monitoring of CMV infection was routinely performed with CMV antigenemia and real-time PCR assays. Real-time plasma PCR and CMV antigenemia assays were assessed on 797 samples. CMV antigenemia correlated with a positive CMV PCR (chi(2) = 78.05; P < .0001). Not only the positive rate but also the number of positive cells correlated with the number of PCR DNA copies (F = 26.07, r(2) = .25, P < .0001). To define an optimal cutoff value of CMV DNA load to initiate treatment in kidney transplant patients, we considered a CMV antigenemia titer of >50 positive cells per 400,000 leukocytes as the gold standard in our previous study. The optimal cutoff value for the quantitative real-time PCR assay was predicted to be 86 copies/microL. Thus, we observed that CMV real-time PCR assay would not completely replace antigenemia assay in kidney transplant recipients, but can be used complementarily to screen antigenemia and monitor preemptive therapy.
authors.affiliation: Department of Surgery, Transplant Division Sungkyunkwan University, #50 Ilwon Dong, Kangnam Ku, Seoul 135 710, Republic of Korea.
authors.forename: D J
authors.initials: DJ
authors.lastname: Kim
authors.forename: S J
authors.initials: SJ
authors.lastname: Kim
authors.forename: J
authors.initials: J
authors.lastname: Park
authors.forename: G S
authors.initials: GS
authors.lastname: Choi
authors.forename: S
authors.initials: S
authors.lastname: Lee
authors.forename: C D
authors.initials: CD
authors.lastname: Kwon
authors.forename: C
authors.initials: C
authors.lastname: Ki
authors.forename: J
authors.initials: J
authors.lastname: Joh
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000956:Antigens, Viral / Q000097:blood*; D003586:Cytomegalovirus Infections / Q000175:diagnosis* / Q000276:immunology; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood / Q000235:genetics; D016030:Kidney Transplantation / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction / Q000379:methods; D011183:Postoperative Complications / Q000175:diagnosis*
chemical_list: D000956:Antigens, Viral; D007074:Immunoglobulin G