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Dolci M, Colico C, Ambrogi F, Favi E, Signorini L, Perego M, Campioli E, Maina KK, Ferrante P, Ferraresso M, Delbue S. Longitudinal study of human polyomaviruses viruria in kidney transplant recipients. Clin Exp Med 2024; 24:3. [PMID: 38231278 PMCID: PMC10794280 DOI: 10.1007/s10238-023-01290-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 11/03/2023] [Indexed: 01/18/2024]
Abstract
INTRODUCTION Immunosuppression after kidney transplantation (KTx) exposes recipients to Human Polyomaviruses (HPyVs) infections, whose natural history is still misunderstood. METHODS Allograft biopsies, and urine from 58 donor-recipient pairs were collected before KTx (T0) and 1 (T1), 15 (T2), 30 (T3), 60 (T4), 90 (T5), 180 (T6), 270 (T7), 360 (T8), and 540 (T9) days after transplant. Specimens were tested for JC (JCPyV) and BK (BKPyV), by quantitative Real-Time PCR. The course of post-KTx HPyVs viruria, and the association between JCPyV viruria in recipients and donors, were evaluated. RESULTS HPyVs were detected in 3/58 (5.2%) allograft biopsies. HPyVs viruria was present in 29/58 (50%) donors and 41/58 (70.7%) recipients. JCPyV DNA was detected in 26/58 (44.8%) donors and 25/58 recipients (43.1%), 19 of whom received kidney from JCPyV positive donor, whereas BKPyV genome was detected in 3 (5.2%) donors and 22 (37.9%) recipients. The median time of JCPyV, and BKPyV first episode of replication was 1, and 171 days post KTx, respectively. At T0, JCPyV viruria of donors was associated with increased risk of JCPyV replication post-KTx; recipients with JCPyV positive donors showed lower risk of BKPyV replication post-KTx. CONCLUSIONS The results suggested that JCPyV may be transmitted by allograft, and that its replication post KTx might prevent BKPyV reactivation. Future investigation regarding correlation between chronic exposure to immunosuppressive agents and HPyVs urinary replication are warranted.
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Affiliation(s)
- Maria Dolci
- Laboratory of Molecular Virology, Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Carlo Pascal 36, 20133, Milan, Italy
| | - Caterina Colico
- Department of Emergency Surgery, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Federico Ambrogi
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
- IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Evaldo Favi
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
- General Surgery and Kidney Transplantation, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Lucia Signorini
- Laboratory of Molecular Virology, Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Carlo Pascal 36, 20133, Milan, Italy
| | - Marta Perego
- General Surgery and Kidney Transplantation, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Edoardo Campioli
- General Surgery and Kidney Transplantation, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Kevin Kamau Maina
- Laboratory of Molecular Virology, Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Carlo Pascal 36, 20133, Milan, Italy
| | - Pasquale Ferrante
- Laboratory of Molecular Virology, Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Carlo Pascal 36, 20133, Milan, Italy
| | - Mariano Ferraresso
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
- General Surgery and Kidney Transplantation, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Serena Delbue
- Laboratory of Molecular Virology, Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Carlo Pascal 36, 20133, Milan, Italy.
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Prevalence of JC and BK Polyomavirus Infection in Patients with Chronic Kidney Disease in the State of Pará, Brazil. Trop Med Infect Dis 2022; 8:tropicalmed8010009. [PMID: 36668916 PMCID: PMC9861779 DOI: 10.3390/tropicalmed8010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/12/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
The polyomaviruses that infect humans, JC virus (JCV) and BK virus (BKV), can establish persistent infections in the cells that make up the renal system, causing nephritis and BKV-associated nephropathy in up to 10% of renal transplant patients, and of these, 90% lose the graft and return for hemodialysis. This study aimed to determine the prevalence of polyomaviruses (PyV) in the population with chronic kidney disease (CKD), classified into three groups (conservative, dialysis, and transplanted) and a control group. Urine samples were collected from 290 individuals, including 202 patients with CKD and 88 from the control group. PyV screening was performed by PCR amplification of a fragment of the VP1 region, and the JCV and BKV species were distinguished through enzymatic digestion with the restriction endonuclease BamHI from the amplification of a TAg region. All amplification products were visualized on a 3% agarose gel. The prevalence of PyV infection was correlated with clinical-epidemiological variables using the chi-squared and Fisher's exact tests. In the group with CKD, the prevalence of PyV was 30.2%, a higher rate being observed in conservative patients (36.66%; 22/60), followed by dialysis patients (30.48%; 25/82), and transplanted patients (20%; 12/60). In the control group, the prevalence was 46.59% (41/88). The differentiation between species revealed that JCV was present in 77.8% and BKV in 22.2% of the group with CKD. The prevalence of infection was higher in male patients (59.32%), whose most common pathology was systemic arterial hypertension (35.59%). In the group of transplanted patients, there was a statistically significant association between infection and the use of the immunosuppressant azathioprine (p = 0.015). The prevalence of PyV infection was higher in the control group than in the group with CKD, being predominant in males and in patients with systemic arterial hypertension.
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Furmaga J, Kowalczyk M, Furmaga-Rokou O, Rokos CA, Zapolski T, Krakowski L, Jakubczak A, Rudzki S. Genotypes and Variants of BKPyV in Organ Donors after Brain Death. Int J Mol Sci 2022; 23:ijms23169173. [PMID: 36012435 PMCID: PMC9409029 DOI: 10.3390/ijms23169173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/09/2022] [Accepted: 08/12/2022] [Indexed: 01/08/2023] Open
Abstract
Kidney transplantation from a donor with latent BKPyV might be the cause of serious complications, such as BK virus-associated nephropathy. The aim of the study was to determine the prevalence of BKPyV infection in donors after brain death (DBDs), to analyse the molecular variation of BKPyV and to compare clinical and inflammation parameters of DBDs infected with various genotypes of BKPyV. BKPyV was investigated in blood and urine samples of 103 DBDs using PCR followed by sequencing and bioinformatic analysis, and the viral load was assessed by qPCR. Clinical parameters, including cellular markers of inflammation were assessed. The results confirm high prevalence of BKPyV (48%),and genotype IV (49%) over genotype I (43%) and the co-infection with genotypes I and IV in 8.2%. Viral load ranged from 102 to 107 copies/mL, with an average of 1.92 × 106 copies/mL. No specific markers for BKPyV infection were detected among the parameters tested. Infection with genotype I may be associated with the adverse impact on thekidney function, while infection with genotype IV was associated with the anemia Not only the viral load but also the genotype of BKPyV may have an impact on the course of infection.
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Affiliation(s)
- Jacek Furmaga
- Department of General and Transplant Surgery and Nutritional Treatment, Medical University of Lublin, 20-954 Lublin, Poland
| | - Marek Kowalczyk
- Institute of Quality Assessment and Processing of Animal Products, University of Life Sciences in Lublin, 20-950 Lublin, Poland
- Correspondence: (M.K.); (A.J.); Tel.: +48-81-445-67-27 (M.K.); +48-81-445-69-92 (A.J.)
| | - Olga Furmaga-Rokou
- Department of Radiology, General Hospital of Thessaloniki George Papanicolaou, 56403 Thessaloniki, Greece
| | - Christos A. Rokos
- Department of Otolaryngology, Head and Neck Surgery, AHEPA University Hospital, Aristotle University of Thessaloniki, Kiriakidi 1, 54636 Thessaloniki, Greece
| | - Tomasz Zapolski
- Department of Cardiology, Medical University of Lublin, 20-954 Lublin, Poland
| | - Leszek Krakowski
- Department and Clinic of Animal Reproduction, Faculty of Veterinary Medicine, University of Life Sciences, Gleboka 30, 20-612 Lublin, Poland
| | - Andrzej Jakubczak
- Institute of Biological Basis of Animal Production, Faculty of Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, 20-950 Lublin, Poland
- Correspondence: (M.K.); (A.J.); Tel.: +48-81-445-67-27 (M.K.); +48-81-445-69-92 (A.J.)
| | - Sławomir Rudzki
- Department of General and Transplant Surgery and Nutritional Treatment, Medical University of Lublin, 20-954 Lublin, Poland
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BK Virus-Associated Nephropathy after Renal Transplantation. Pathogens 2021; 10:pathogens10020150. [PMID: 33540802 PMCID: PMC7913099 DOI: 10.3390/pathogens10020150] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/29/2021] [Accepted: 01/29/2021] [Indexed: 02/06/2023] Open
Abstract
Recent advances in immunosuppressive therapy have reduced the incidence of acute rejection and improved renal transplantation outcomes. Meanwhile, nephropathy caused by BK virus has become an important cause of acute or chronic graft dysfunction. The usual progression of infection begins with BK viruria and progresses to BK viremia, leading to BK virus associated nephropathy. To detect early signs of BK virus proliferation before the development of nephropathy, several screening tests are used including urinary cytology and urinary and plasma PCR. A definitive diagnosis of BK virus associated nephropathy can be achieved only histologically, typically by detecting tubulointerstitial inflammation associated with basophilic intranuclear inclusions in tubular and/or Bowman’s epithelial cells, in addition to immunostaining with anti-Simian virus 40 large T-antigen. Several pathological classifications have been proposed to categorize the severity of the disease to allow treatment strategies to be determined and treatment success to be predicted. Since no specific drugs that directly suppress the proliferation of BKV are available, the main therapeutic approach is the reduction of immunosuppressive drugs. The diagnosis of subsequent acute rejection, the definition of remission, the protocol of resuming immunosuppression, and long-term follow-up remain controversial.
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Alwahaibi NY, Al Maskari TM, Aldairi N. Decoy Cells versus Plasma Real-Time Polymerase Chain Reaction for the Detection of Polyomaviruses in Renal Transplant Patients: A Single Institutional Experience. J Cytol 2019; 37:30-33. [PMID: 31942095 PMCID: PMC6947735 DOI: 10.4103/joc.joc_167_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 04/13/2019] [Accepted: 10/09/2019] [Indexed: 11/15/2022] Open
Abstract
Background and Aims: Microscopic detection of decoy cells is routinely performed in urine samples from renal transplant patients for the evaluation of polyomaviruses. However, they are scanty papers evaluated the diagnostic accuracy of decoy cells in urine samples. The aim of this study is to evaluate the diagnostic accuracy of decoy cells in urine samples and compare with plasma real-time polymerase chain reaction (RT-PCR) as a gold standard method. In addition, to compare the findings of this study with other similar studies. Methods: A retrospective study over a period of four years from January 2014 to December 2017 was performed. A total of 89 urine samples from renal transplant patients were assessed for the presence of polyomaviruses and compared with plasma RT-PCR. The sensitivity, specificity, accuracy, positive predictive value (PPV) and negative predictive value (NPV) were measured. Results: There were 29 males and 18 females. The mean patient age was 40.3 years. The sensitivity, specificity, accuracy, PPV and NPV were 86.6%, 67.5%, 70.7%, 35.1% and 96.1%, respectively. Other similar studies reported a sensitivity of 41.9-84.6%, specificity of 65.8-100% and accuracy of 69.9-82%. Conclusion: The findings of this study show that the detection of decoy cells in urine samples is a sensitive screening method for polyomaviruses. The findings of this study are compatible with other similar studies.
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Affiliation(s)
- Nasar Y Alwahaibi
- Department of Allied Health Sciences, Sultan Qaboos University Hospital, Muscat, Oman
| | | | - Najat Aldairi
- Department of Pathology, Sultan Qaboos University Hospital, Muscat, Oman
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Sarmento DJDS, Palmieri M, Galvão GS, Tozetto-Mendoza TR, Canto CMD, Pierrotti LC, David-Neto E, Agena F, Gallottini M, Pannuti CS, Fink MCD, Braz-Silva PH. BK virus salivary shedding and viremia in renal transplant recipients. J Appl Oral Sci 2019; 27:e20180435. [PMID: 30673031 PMCID: PMC6438661 DOI: 10.1590/1678-7757-2018-0435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 09/12/2018] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES This study aimed to verify the presence of polyomavirus BK (BKPyV) in the saliva of kidney transplant recipients and to correlate it with blood viremia. MATERIAL AND METHODS We have conducted a cross-sectional study with a sample involving 126 renal transplant recipients. 126 samples of saliva and 52 samples of blood were collected from these patients. Detection and quantification of BKPyV were performed using a real-time PCR. To compare the presence of BKPyV in blood and saliva, the binomial proportion test was used. To verify associations between salivary shedding BKPyV and post-transplant periods (in months), the Mann-Whitney test was used. Spearman's correlation was used to correlate the viral load in the saliva with blood of kidney transplant recipients. RESULTS The mean age of the study group was 51.11±12.45 years old, and 69 participants (54.8%) were female, with a mean post-transplantation time of 4.80±6.04 months. BKPyV was quantified in several samples of saliva and blood, with medians of 1,108 cp/mL and 1,255 cp/mL, respectively. Only 16/52 (30.8%) participants presented BKPyV in blood, and 59/126 (46.8%) excreted the virus in saliva (p=0.004). BKPyV shedding was found in patients at a shorter post-transplantation period (3.86±5.25, p=0.100). A weak correlation was observed between viral quantification in saliva and blood (Spearman's correlation coefficient=0.193). CONCLUSION The results of this study suggested that, although saliva excretes more BKPyV than blood, there is no reliable correlation between salivary shedding and blood viremia, showing two independent compartments of viral replication.
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Affiliation(s)
| | - Michelle Palmieri
- University of São Paulo, School of Dentistry, Stomatology Department, São Paulo, São Paulo, Brazil
| | - Gustavo Souza Galvão
- University of São Paulo, School of Dentistry, Stomatology Department, São Paulo, São Paulo, Brazil
| | - Tânia Regina Tozetto-Mendoza
- University of São Paulo, Institute of Tropical Medicine of São Paulo, Laboratory of Virology, São Paulo, São Paulo, Brazil
| | - Cynthia Motta do Canto
- University of São Paulo, Institute of Tropical Medicine of São Paulo, Laboratory of Virology, São Paulo, São Paulo, Brazil
| | - Ligia Camera Pierrotti
- University of São Paulo, Medical School, Hospital das Clínicas, Departament of Infectious and Parasitic Diseases, São Paulo, São Paulo, Brazil
| | - Elias David-Neto
- University of São Paulo, Medical School, Hospital das Clínicas, Serviço de Transplante Renal, São Paulo, São Paulo, Brazil
| | - Fabiana Agena
- University of São Paulo, Medical School, Hospital das Clínicas, Serviço de Transplante Renal, São Paulo, São Paulo, Brazil
| | - Marina Gallottini
- University of São Paulo, School of Dentistry, Stomatology Department, São Paulo, São Paulo, Brazil
| | - Claudio Sergio Pannuti
- University of São Paulo, Institute of Tropical Medicine of São Paulo, Laboratory of Virology, São Paulo, São Paulo, Brazil
| | - Maria Cristina Domingues Fink
- University of São Paulo, Institute of Tropical Medicine of São Paulo, Laboratory of Virology, São Paulo, São Paulo, Brazil
| | - Paulo Henrique Braz-Silva
- University of São Paulo, School of Dentistry, Stomatology Department, São Paulo, São Paulo, Brazil.,University of São Paulo, Institute of Tropical Medicine of São Paulo, Laboratory of Virology, São Paulo, São Paulo, Brazil
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邓 伟, 刘 燕, 于 立, 邓 文, 付 绍, 徐 健, 杜 传, 王 亦, 刘 如, 叶 桂, 黄 刚, 苗 芸. [Early intervention of BK virus replication promotes stabilization of renal graft function]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1110-1115. [PMID: 28801294 PMCID: PMC6765723 DOI: 10.3969/j.issn.1673-4254.2017.08.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate the optimal time window for intervention of BK virus (BKV) replication and its effect on the outcomes of kidney transplant recipients (KTRs). METHODS A retrospective analysis of the clinical data and treatment regimens was conducted among KTRs whose urine BKV load was ≥1.0×104 copies/mL following the operation between April, 2000 and April, 2015. KTRs with urine BKV load <1.0×104 copies/mL matched for transplantation time served as the control group. RESULTS A total of 54 recipients positive for urine BKV were included in the analysis. According to urine BKV load, the recipients were divided into 3 groups: group A with urine BKV load of 1.0×104-1.0×107 copies/mL (n=22), group B with urine BKV load >1.0×107 copies/mL (n=24), and group C with plasma BKV load ≥1.0×104 copies/mL (n=8); 47 recipients were included in the control group. During the follow-up for 3.2-34.5 months, the urine and plasma BKV load was obviously lowered after intervention in all the 54 BKV-positive recipients (P<0.05). Eighteen (81.82%) of the recipients in group A and 19 (79.17%) in group B showed stable or improved estimated glomerular filtration rate (eGFR) after the intervention; in group C, 4 recipients (50%) showed stable eGFR after the intervention. In the last follow-up, the recipients in groups A and B showed similar eGFR with the control group (P>0.05), but in group C, eGFR was significantly lower than that of the control group (P=0.001). The recipients in group A and the control group had the best allograft outcome with stable or improved eGFR. CONCLUSION Early intervention of BKV replication (urine BKV load ≥1.0×104 copies/mL) in KTRs with appropriate immunosuppression reduction can be helpful for stabilizing the allograft function and improving the long-term outcomes.
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Affiliation(s)
- 伟明 邓
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 燕娜 刘
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 立新 于
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 文锋 邓
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 绍杰 付
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 健 徐
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 传福 杜
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 亦斌 王
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 如敏 刘
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 桂荣 叶
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 刚 黄
- 中山大学附属第一医院器官移植科, 广东 广州 510080Department of Organ Transplantation, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - 芸 苗
- 南方医科大学南方医院器官移植科, 广东 广州 510515Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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Association Between the Polyomaviruses Titers and Decoy Cell Positivity Rates After Renal Transplantation. Transplant Proc 2017; 48:921-3. [PMID: 27234768 DOI: 10.1016/j.transproceed.2016.02.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/08/2016] [Accepted: 02/18/2016] [Indexed: 01/11/2023]
Abstract
BACKGROUND Urinary decoy cells develop after renal transplantation and their appearance is attributable primarily to the proliferation of polyomavirus types BK and JC. We measured the levels of these 2 viruses that cause decoy cells to appear in the urine. PATIENTS AND METHODS BK and JC virus levels were quantified in 1182 urine samples from 335 renal transplant patients using a multiplex Taqman real-time polymerase chain reaction assay. Forty-four samples were excluded from analyses because both viruses were present at ≥10(4) copies/mL. We analyzed the relationship between viral load and the presence of urinary decoy cells. RESULTS Decoy cells were observed in 237 of 1138 urine samples (21%) and the BK and JC viruses were positive in 205 (18%) and 455 (40%) samples, respectively. Decoy cells were observed in 0%, 21%, 67%, 87%, 100%, and 96% of urine samples when the BK viral load was <10(4), 10(4)-10(5), 10(5)-10(6), 10(6)-10(7), 10(7)-10(8), and ≥10(8) copies/mL, respectively; and in 1%, 13%, 41%, 59%, 87%, and 97% of urine samples when the JC viral load was <10(4), 10(4)-10(5), 10(5)-10(6), 10(6)-10(7), 10(7)-10(8), and ≥10(8) copies/mL, respectively. CONCLUSIONS BK virus more frequently triggered the appearance of decoy cells than did JC virus at equivalent viral titers.
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Atyabi SR, Bouzari M, Kardi MT. John Cunningham (JC) virus genotypes in kidney transplant recipients, rheumatoid arthritis patients and healthy individuals in Isfahan, Iran. J Med Virol 2016; 89:337-344. [PMID: 27391167 DOI: 10.1002/jmv.24626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/05/2016] [Indexed: 11/11/2022]
Abstract
In healthy individuals John Cunningham virus is latent without any clinical signs, but in the cases of the use of immunosuppressive drugs in graft recipients, autoimmune diseases and also increasing of age, that the immune system is suppressed it may cause disease in reactivation. Progressive multifocal leukoencephalopathy (PML) is the well-known disease caused by the virus. It has also been associated with nephropathy and tumorogensis. At present, based on vp1 capsid gene 7 genotypes have been detected. Genetic variations of JC virus in different geographical areas and the presence of different subtypes is a useful tool for reconstructing of the genetic information of JC virus and understanding of its evolution. The aim of this study was to investigate different genotypes of the JC virus in the urine of 100 kidney transplant recipients, 43 rheumatoid arthritis patients, and 100 healthy individuals as control group in Isfahan. DNA was extracted by phenol-chloroform method and subjected to a nested PCR using specific primer for vp1 capsid gene designed by Oligo 7 software. Fisher's exact test was used for statistical analyses. Using MEGA 6 software the sequences were aligned using Clustal W tool and phylogenetic trees were constructed by neighbor joining method. Thirty-one positive samples were sequenced. Genotypes 1, 3, and 4 of the virus were detected for the first time in Iran. For the first time genotype 3 was reported as the dominant genotype in Iran. For the first time in the world, genotype 4 was detected in rheumatoid arthritis patients. J. Med. Virol. 89:337-344, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Majid Bouzari
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran
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Kluba J, Linnenweber-Held S, Heim A, Ang AM, Raggub L, Broecker V, Becker JU, Schulz TF, Schwarz A, Ganzenmueller T. A rolling circle amplification screen for polyomaviruses other than BKPyV in renal transplant recipients confirms high prevalence of urinary JCPyV shedding. Intervirology 2015; 58:88-94. [PMID: 25677461 DOI: 10.1159/000369210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 10/20/2014] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Multiple novel human polyomaviruses (HPyVs) have been discovered in the last few years. These or other, unknown, nephrotropic HPyVs may potentially be shed in urine. METHODS To search for known and unknown HPyVs we investigated BKPyV-negative urine samples from 105 renal transplant recipients (RTR) by rolling circle amplification (RCA) analysis and quantitative JCPyV PCR. Clinical data was analysed to identify risk factors for urinary polyomavirus shedding. RESULTS In 10% (11/105) of the urine samples RCA with subsequent sequencing revealed JCPyV, but no other HPyV sequences. Using quantitative JCPyV PCR, 24% (25/105) of the samples tested positive. Overall sensitivities of RCA of 44% (11/25) in detecting JCPyV in JCPyV DNA-positive urine and 67% (10/15) for samples with JCPyV loads >10,000 copies/ml can be assumed. Despite frequent detectable urinary shedding of JCPyV in our cohort, this could not be correlated with clinical risk factors. CONCLUSION Routine urinary JCPyV monitoring in BKPyV-negative RTR without suspected polyomavirus-associated nephropathy might be of limited diagnostic value. As RCA works in a sequence-independent manner, detection of novel and known polyomaviruses shed in sufficient quantities is feasible. High-level shedding of HPyVs other than BKPyV or JCPyV in the urine of RTR is unlikely to occur.
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Affiliation(s)
- Jeanette Kluba
- Institute of Virology, Hannover Medical School, Hannover, Germany
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