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Wang X, Pu F, Yang X, Feng X, Zhang J, Duan K, Nian X, Ma Z, Ma XX, Yang XM. Immunosuppressants exert antiviral effects against influenza A(H1N1)pdm09 virus via inhibition of nucleic acid synthesis, mRNA splicing, and protein stability. Virulence 2024; 15:2301242. [PMID: 38170681 PMCID: PMC10854267 DOI: 10.1080/21505594.2023.2301242] [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: 08/10/2023] [Accepted: 12/28/2023] [Indexed: 01/05/2024] Open
Abstract
Influenza A virus (IAV) poses a threat to patients receiving immunosuppressive medications since they are more susceptible to infection with severe symptoms, and even death. Understanding the direct effects of immunosuppressants on IAV infection is critical for optimizing immunosuppression in these patients who are infected or at risk of influenza virus infection. We profiled the effects of 10 immunosuppressants, explored the antiviral mechanisms of immunosuppressants, and demonstrated the combined effects of immunosuppressants with the antiviral drug oseltamivir in IAV-infected cell models. We found that mycophenolic acid (MPA) strongly inhibits viral RNA replication via depleting cellular guanosine pool. Treatment with 6-Thioguanine (6-TG) promoted viral protein degradation through a proteasomal pathway. Filgotinib blocked mRNA splicing of matrix protein 2, resulting in decreased viral particle assembly. Furthermore, combined treatment with immunosuppressants and oseltamivir inhibits IAV viral particle production in an additive or synergic manner. Our results suggest that MPA, 6-TG, and filgotinib could be the preferential choices for patients who must take immunosuppressants but are at risk of influenza virus infection.
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Affiliation(s)
- Xin Wang
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Feiyang Pu
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Xuanye Yang
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Xili Feng
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Jiayou Zhang
- National Engineering Technology Research Center for Combined Vaccines, Wuhan, China
- Wuhan Institute of Biological Products Co, Ltd, Wuhan, China
| | - Kai Duan
- National Engineering Technology Research Center for Combined Vaccines, Wuhan, China
- Wuhan Institute of Biological Products Co, Ltd, Wuhan, China
| | - Xuanxuan Nian
- National Engineering Technology Research Center for Combined Vaccines, Wuhan, China
- Wuhan Institute of Biological Products Co, Ltd, Wuhan, China
| | - Zhongren Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Xiao-Xia Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Xiao-Ming Yang
- National Engineering Technology Research Center for Combined Vaccines, Wuhan, China
- China National Biotech Group Company Limited, Beijing, China
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2
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Jacq A, Auvray C, Blot M, Bouhemad B, Casenaz A, Lamarthée B, Legendre M, Quenot JP, Zanetta G, Tinel C. Adequacy to immunosuppression management guidelines in kidney transplant recipients with severe COVID-19 pneumonia: a practice survey. FRONTIERS IN TRANSPLANTATION 2024; 3:1305152. [PMID: 38993755 PMCID: PMC11235282 DOI: 10.3389/frtra.2024.1305152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 03/01/2024] [Indexed: 07/13/2024]
Abstract
Introduction Coronavirus disease 2019 (COVID-19) poses an important risk of morbidity and of mortality, in patients after solid organ transplantation. Recommendations have been issued by various transplantation societies at the national and European level to manage the immunosuppressive (IS) regimen upon admission to intensive care unit (ICU). Method The aim of this study was to evaluate the adequacy of IS regimen minimization strategy in kidney transplant recipients hospitalized in an ICU for severe COVID-19, in relation to the issued recommendations. Results The immunosuppressive therapy was minimized in all patients, with respectively 63% and 59% of the patients meeting the local and european recommendations upon admission. During ICU stay, IS was further tapered leading to 85% (local) and 78% (european) adequacy, relative to the guidelines. The most frequent deviation was the lack of complete withdrawal of mycophenolic acid (22%). Nevertheless, the adequacy/inadequacy status was not associated to the ICU- or one-year-mortality. Discussion In this single-center cohort, the only variable associated with a reduction in mortality was vaccination, emphasizing that the key issue is immunization prior to infection, not restoration of immunity during ICU stay.
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Affiliation(s)
- Amélie Jacq
- Department of Nephrology and Kidney Transplantation, Dijon University Hospital, Dijon, France
| | | | - Mathieu Blot
- Department of Infectious Diseases, Dijon University Hospital, Dijon, France
| | - Belaïd Bouhemad
- Anesthesia and Intensive Care Department, Dijon University Hospital, Dijon, France
| | - Alice Casenaz
- Department of Virology, Dijon University Hospital, Dijon, France
| | - Baptiste Lamarthée
- TAI-IT Department, Inserm UMR Right, Université de Franche Comté, EFS BFC, Besançon, France
| | - Mathieu Legendre
- Department of Nephrology and Kidney Transplantation, Dijon University Hospital, Dijon, France
| | - Jean-Pierre Quenot
- Medical Intensive Care Department, Dijon University Hospital, Dijon, France
| | - Gilbert Zanetta
- Department of Nephrology and Kidney Transplantation, Dijon University Hospital, Dijon, France
| | - Claire Tinel
- Department of Nephrology and Kidney Transplantation, Dijon University Hospital, Dijon, France
- TAI-IT Department, Inserm UMR Right, Université de Franche Comté, EFS BFC, Besançon, France
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3
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López V, Mazuecos A, Villanego F, López-Oliva M, Alonso A, Beneyto I, Crespo M, Díaz-Corte C, Franco A, González-Roncero F, Guirado L, Jiménez C, Juega J, Llorente S, Paul J, Rodríguez-Benot A, Ruiz JC, Sánchez-Fructuoso A, Torregrosa V, Zárraga S, Rodrigo E, Hernández D. Update of the recommendations on the management of the SARS-CoV-2 coronavirus pandemic (COVID-19) in kidney transplant patients. Nefrologia 2023; 43:531-545. [PMID: 37957107 DOI: 10.1016/j.nefroe.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/09/2022] [Accepted: 11/10/2022] [Indexed: 11/15/2023] Open
Abstract
SARS-CoV-2 infection (COVID-19) has had a significant impact on transplant activity in our country. Mortality and the risk of complications associated with COVID-19 in kidney transplant recipients (KT) were expected to be higher due to their immunosuppressed condition and the frequent associated comorbidities. Since the beginning of the pandemic in March 2020 we have rapidly improved our knowledge about the epidemiology, clinical features and management of COVID-19 post-transplant, resulting in a better prognosis for our patients. KT units have been able to adapt their programs to this new reality, normalizing both donation and transplantation activity in our country. This manuscript presents a proposal to update the general recommendations for the prevention and treatment of infection in this highly vulnerable population such as KT.
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Affiliation(s)
- Verónica López
- Unidad de Gestión Clínica de Nefrología, Hospital Regional Universitario de Málaga, Universidad de Málaga, Instituto Biomédico de Investigación de Málaga (IBIMA), RICORS2040 (RD21/0005/0012), Málaga, Spain.
| | | | | | | | - Angel Alonso
- Servicio de Nefrología, Complejo Hospitalario A Coruña, A Coruña, Spain
| | - Isabel Beneyto
- Servicio de Nefrología, Hospital Universitario Politécnico La Fe, Valencia, Spain
| | - Marta Crespo
- Servicio de Nefrología, Hospital del Mar, Hospital del Mar Medical Research Institute (IMIM), RD16/0009/0013 (ISCIII FEDER REDinREN), Barcelona, Spain
| | - Carmen Díaz-Corte
- Servicio de Nefrología, Hospital Universitario Central de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Antonio Franco
- Servicio de Nefrología, Hospital de Alicante, Alicante, Spain
| | | | - Luis Guirado
- Servicio de Nefrología, Fundación Puigvert, REDinREN RD16/0009/0019, Barcelona, Spain
| | | | - Javier Juega
- Servicio de Nefrología, Hospital Trias i Pujol, REDinREN RD16/0009/0032, Barcelona, Spain
| | - Santiago Llorente
- Servicio de Nefrología, Hospital Virgen de la Arrixaca, Murcia, Spain
| | - Javier Paul
- Servicio de Nefrología, Hospital Miguel Servet, Zaragoza, Spain
| | - Alberto Rodríguez-Benot
- Servicio de Nefrología, Hospital Reina Sofía, Instituto Maimónides de Investigación Biomédica de Córdoba, Córdoba, Spain
| | - Juan Carlos Ruiz
- Servicio de Nefrología, Hospital Marqués de Valdecilla, IDIVAL, REDinREN RD16/0009/0027, Santander, Cantabria, Spain
| | - Ana Sánchez-Fructuoso
- Servicio de Nefrología, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain
| | | | - Sofía Zárraga
- Servicio de Nefrología, Hospital de Cruces, Bilbao, Vizcaya, Spain
| | - Emilio Rodrigo
- Servicio de Nefrología, Hospital Marqués de Valdecilla, IDIVAL, REDinREN RD16/0009/0027, Santander, Cantabria, Spain
| | - Domingo Hernández
- Unidad de Gestión Clínica de Nefrología, Hospital Regional Universitario de Málaga, Universidad de Málaga, Instituto Biomédico de Investigación de Málaga (IBIMA), RICORS2040 (RD21/0005/0012), Málaga, Spain
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4
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López-Oliva MO, Pérez-Flores I, Molina M, José Aladrén M, Trujillo H, Redondo-Pachón D, López V, Facundo C, Villanego F, Rodríguez M, Carmen Ruiz M, Antón P, Rivas-Oural A, Cabello S, Portolés J, de la Vara L, Tabernero G, Valero R, Galeano C, Moral E, Ventura A, Coca A, Ángel Muñoz M, Hernández-Gallego R, Shabaka A, Ledesma G, Bouarich H, Ángeles Rodríguez M, Pérez Tamajón L, Cruzado L, Emilio Sánchez J, Jiménez C. Management of immunosuppressive therapy in kidney transplant recipients with COVID-19. A multicentre national study derived from the Spanish Society of Nephrology COVID registry. Nefrologia 2023; 43:442-451. [PMID: 37661514 DOI: 10.1016/j.nefroe.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/27/2022] [Indexed: 09/05/2023] Open
Abstract
INTRODUCTION SARS CoV2 infection has had a major impact on renal transplant patients with a high mortality in the first months of the pandemic. Intentional reduction of immunosuppressive therapy has been postulated as one of the cornerstone in the management of the infection in the absence of targeted antiviral treatment. This has been modified according to the patient`s clinical situation and its effect on renal function or anti-HLA antibodies in the medium term has not been evaluated. OBJECTIVES Evaluate the management of immunosuppressive therapy made during SARS-CoV2 infection, as well as renal function and anti-HLA antibodies in kidney transplant patients 6 months after COVID19 diagnosis. MATERIAL AND METHODS Retrospective, national multicentre, retrospective study (30 centres) of kidney transplant recipients with COVID19 from 01/02/20 to 31/12/20. Clinical variables were collected from medical records and included in an anonymised database. SPSS statistical software was used for data analysis. RESULTS renal transplant recipients with COVID19 were included (62.6% male), with a mean age of 57.5 years. The predominant immunosuppressive treatment prior to COVID19 was triple therapy with prednisone, tacrolimus and mycophenolic acid (54.6%) followed by m-TOR inhibitor regimens (18.6%). After diagnosis of infection, mycophenolic acid was discontinued in 73.8% of patients, m-TOR inhibitor in 41.4%, tacrolimus in 10.5% and cyclosporin A in 10%. In turn, 26.9% received dexamethasone and 50.9% were started on or had their baseline prednisone dose increased. Mean creatinine before diagnosis of COVID19, at diagnosis and at 6 months was: 1.7 ± 0.8, 2.1 ± 1.2 and 1.8 ± 1 mg/dl respectively (p < 0.001). 56.9% of the patients (N = 350) were monitored for anti-HLA antibodies. 94% (N = 329) had no anti-HLA changes, while 6% (N = 21) had positive anti-HLA antibodies. Among the patients with donor-specific antibodies post-COVID19 (N = 9), 7 patients (3.1%) had one immunosuppressant discontinued (5 patients had mycophenolic acid and 2 had tacrolimus), 1 patient had both immunosuppressants discontinued (3.4%) and 1 patient had no change in immunosuppression (1.1%), these differences were not significant. CONCLUSIONS The management of immunosuppressive therapy after diagnosis of COVID19 was primarily based on discontinuation of mycophenolic acid with very discrete reductions or discontinuations of calcineurin inhibitors. This immunosuppression management did not influence renal function or changes in anti-HLA antibodies 6 months after diagnosis.
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Affiliation(s)
| | | | - María Molina
- Servicio de Nefrología, Hospital U. Germans Trias y Pujol, Barcelona, Spain
| | | | | | | | - Verónica López
- Servicio de Nefrología, Hospital U. Carlos Haya, Málaga, Spain
| | - Carme Facundo
- Servicio de Nefrología, Hospital U. Fundación Puigvert, Barcelona, Spain
| | | | - Marisa Rodríguez
- Servicio de Nefrología, Hospital U. Gregorio Marañón, Madrid, Spain
| | - Maria Carmen Ruiz
- Servicio de Nefrología, Hospital U. Virgen de las Nieves, Granada, Spain
| | - Paula Antón
- Servicio de Nefrología, Hospital U. Bellvitge, Barcelona, Spain
| | - Alba Rivas-Oural
- Servicio de Nefrología, Hospital U. Central de Asturias, Oviedo, Spain
| | - Sheila Cabello
- Servicio de Nefrología, Hospital U. Son Espases, Palma de Mallorca, Spain
| | - José Portolés
- Servicio de Nefrología, Hospital U. de Albacete, Spain
| | | | | | - Rosalía Valero
- Servicio de Nefrología, Hospital U. Marqués de Valdecilla, Santander, Spain
| | - Cristina Galeano
- Servicio de Nefrología, Hospital U. Ramón y Cajal, Madrid, Spain
| | | | - Ana Ventura
- Servicio de Nefrología, Hospital U. La Fe, Valencia, Spain
| | - Armando Coca
- Servicio de Nefrología, Hospital Clínico Universitario, Valladolid, Spain
| | | | | | - Amir Shabaka
- Servicio de Nefrología, Hospital Fundación Alcorcón, Madrid, Spain
| | - Gabriel Ledesma
- Servicio de Nefrología, Hospital U. Infanta Sofía, Madrid, Spain
| | - Hanane Bouarich
- Servicio de Nefrología, Hospital U. Príncipe de Asturias, Madrid, Spain
| | | | | | | | - José Emilio Sánchez
- Servicio de Nefrología, Hospital de Cabueñes, Asturias, Coordinador Registro COVID S.E.N., Spain
| | - Carlos Jiménez
- Servicio de Nefrología, Hospital U. La Paz, Madrid, Spain
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5
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Acyclovir resistance in herpes simplex viruses: Prevalence and therapeutic alternatives. Biochem Pharmacol 2022; 206:115322. [DOI: 10.1016/j.bcp.2022.115322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/20/2022] [Accepted: 10/20/2022] [Indexed: 11/19/2022]
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6
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López V, Mazuecos A, Villanego F, López-Oliva M, Alonso A, Beneyto I, Crespo M, Díaz-Corte C, Franco A, González-Roncero F, Guirado L, Jiménez C, Juega J, Llorente S, Paul J, Rodríguez-Benot A, Ruiz JC, Sánchez-Fructuoso A, Torregrosa V, Zárraga S, Rodrigo E, Hernández D. [Update of the recommendations on the management of the SARS-CoV-2 coronavirus pandemic (COVID-19) in kidney transplant patients.]. Nefrologia 2022; 43:S0211-6995(22)00174-6. [PMID: 36405492 PMCID: PMC9664833 DOI: 10.1016/j.nefro.2022.11.001] [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: 10/10/2022] [Accepted: 11/10/2022] [Indexed: 11/17/2022] Open
Abstract
SARS-CoV-2 infection (COVID-19) has had a significant impact on transplant activity in our country. Mortality and the risk of complications associated with COVID-19 in kidney transplant recipients (KT) were expected to be higher due to their immunosuppressed condition and the frequent associated comorbidities. Since the beginning of the pandemic in March 2020 we have rapidly improved our knowledge about the epidemiology, clinical features and management of COVID-19 post-transplant, resulting in a better prognosis for our patients. KT units have been able to adapt their programs to this new reality, normalizing both donation and transplantation activity in our country.This manuscript presents a proposal to update the general recommendations for the prevention and treatment of infection in this highly vulnerable population such as KT.
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Affiliation(s)
- Verónica López
- Unidad de Gestión Clínica de Nefrología. Hospital Regional Universitario de Málaga, Universidad de Málaga, Instituto Biomédico de Investigación de Málaga (IBIMA), RICORS2040 (RD21/0005/0012), Málaga, España
| | | | | | | | - Angel Alonso
- Servicio de Nefrología. Complejo Hospitalario A Coruña, España
| | - Isabel Beneyto
- Servicio de Nefrología. Hospital Universitario Politécnico La Fe, Valencia, España
| | - Marta Crespo
- Servicio de Nefrología. Hospital del Mar, Hospital del Mar Medical Research Institute (IMIM), Barcelona, España. RD16/0009/0013 (ISCIII FEDER REDinREN), España
| | - Carmen Díaz-Corte
- Servicio de Nefrología. Hospital Universitario Central de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Asturias, España
| | - Antonio Franco
- Servicio de Nefrología. Hospital de Alicante, Alicante, España
| | | | - Luis Guirado
- Servicio de Nefrología. Fundación Puigvert, REDinREN RD16/0009/0019, Barcelona, España
| | | | - Javier Juega
- Servicio de Nefrología. Hospital Trias i Pujol, REDinREN RD16/0009/0032, Barcelona, España
| | - Santiago Llorente
- Servicio de Nefrología. Hospital Virgen de la Arrixaca, Murcia, España
| | - Javier Paul
- Servicio de Nefrología. Hospital Miguel Servet, Zaragoza, España
| | - Alberto Rodríguez-Benot
- Servicio de Nefrología. Hospital Reina Sofía, Instituto Maimónides de Investigación Biomédica de Córdoba, Córdoba, España
| | - Juan Carlos Ruiz
- Servicio de Nefrología. Hospital Marqués de Valdecilla, IDIVAL, REDinREN RD16/0009/0027, Santander, España
| | - Ana Sánchez-Fructuoso
- Serivicio de Nefrología. Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, España
| | | | - Sofía Zárraga
- Servicio de Nefrología. Hospital de Cruces, Bilbao, España
| | - Emilio Rodrigo
- Servicio de Nefrología. Hospital Marqués de Valdecilla, IDIVAL, REDinREN RD16/0009/0027, Santander, España
| | - Domingo Hernández
- Unidad de Gestión Clínica de Nefrología. Hospital Regional Universitario de Málaga, Universidad de Málaga, Instituto Biomédico de Investigación de Málaga (IBIMA), RICORS2040 (RD21/0005/0012), Málaga, España
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7
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López-Oliva MO, Pérez-Flores I, Molina M, José Aladrén M, Trujillo H, Redondo-Pachón D, López V, Facundo C, Villanego F, Rodríguez M, Carmen Ruiz M, Antón P, Rivas-Oural A, Cabello S, Portolés J, de la Vara L, Tabernero G, Valero R, Galeano C, Moral E, Ventura A, Coca A, Muñoz MÁ, Hernández-Gallego R, Shabaka A, Ledesma G, Martínez P, Ángeles Rodríguez M, Tamajón LP, Cruzado L, Emilio Sánchez J, Jiménez C. [Management of immunosuppressive therapy in kidney transplant recipients with COVID19. A multicentre national study derived form the S.E.N. COVID registry.]. Nefrologia 2022; 43:S0211-6995(22)00076-5. [PMID: 35528867 PMCID: PMC9055748 DOI: 10.1016/j.nefro.2022.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/27/2022] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION SARS CoV2 infection has had a major impact on renal transplant patients with a high mortality in the first months of the pandemic. Intentional reduction of immunosuppressive therapy has been postulated as one of the cornerstone in the management of the infection in the absence of targeted antiviral treatment. This has been modified according to the patient`s clinical situation and its effect on renal function or anti-HLA antibodies in the medium term has not been evaluated. OBJECTIVES Evaluate the management of immunosuppressive therapy made during SARS-CoV2 infection, as well as renal function and anti-HLA antibodies in kidney transplant patients 6 months after COVID19 diagnosis. MATERIAL AND METHODS Retrospective, national multicentre, retrospective study (30 centres) of kidney transplant recipients with COVID19 from 01/02/20 to 31/12/20. Clinical variables were collected from medical records and included in an anonymised database. SPSS statistical software was used for data analysis. RESULTS 615 renal transplant recipients with COVID19 were included (62.6% male), with a mean age of 57.5 years.The predominant immunosuppressive treatment prior to COVID19 was triple therapy with prednisone, tacrolimus and mycophenolic acid (54.6%) followed by m-TOR inhibitor regimens (18.6%). After diagnosis of infection, mycophenolic acid was discontinued in 73.8% of patients, m-TOR inhibitor in 41.4%, tacrolimus in 10.5% and cyclosporin A in 10%. In turn, 26.9% received dexamethasone and 50.9% were started on or had their baseline prednisone dose increased.Mean creatinine before diagnosis of COVID19, at diagnosis and at 6 months was: 1.7±0.8, 2.1±1.2 and 1.8±1 mg/dl respectively (p<0.001).56.9% of the patients (N=350) were monitored for anti-HLA antibodies. 94% (N=329) had no anti-HLA changes, while 6% (N=21) had positive anti-HLA antibodies. Among the patients with donor-specific antibodies post-COVID19 (N=9), 7 patients (3.1%) had one immunosuppressant discontinued (5 patients had mycophenolic acid and 2 had tacrolimus), 1 patient had both immunosuppressants discontinued (3.4%) and 1 patient had no change in immunosuppression (1.1%), these differences were not significant. CONCLUSIONS The management of immunosuppressive therapy after diagnosis of COVID19 was primarily based on discontinuation of mycophenolic acid with very discrete reductions or discontinuations of calcineurin inhibitors. This immunosuppression management did not influence renal function or changes in anti-HLA antibodies 6 months after diagnosis.
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Affiliation(s)
| | | | - María Molina
- Servicio de Nefrología, Hospital U. Germans Trias y Pujol, Barcelona, Spain
| | - Mª José Aladrén
- Servicio de Nefrología, Hospital U. Miguel Servet, Zaragoza, Spain
| | | | | | - Verónica López
- Servicio de Nefrología, Hospital U. Carlos Haya, Málaga, Spain
| | - Carme Facundo
- Servicio de Nefrología, Hospital U. Fundación Puigvert, Barcelona, Spain
| | | | - Marisa Rodríguez
- Servicio de Nefrología, Hospital U. Gregorio Marañón, Madrid, Spain
| | - Mª Carmen Ruiz
- Servicio de Nefrología, Hospital U. Virgen de las Nieves, Granada, Spain
| | - Paula Antón
- Servicio de Nefrología, Hospital U. Bellvitge, Barcelona, Spain
| | | | - Sheila Cabello
- Servicio de Nefrología, Hospital U. Son Espases, Palma de Mallorca, Spain
| | - José Portolés
- Servicio de Nefrología, Hospital U. Puerta de Hierro, Madrid, Spain
| | | | | | - Rosalía Valero
- Servicio de Nefrología, Hospital U. Marqués de Valdecilla, Santander, Spain
| | - Cristina Galeano
- Servicio de Nefrología, Hospital U. Ramón y Cajal, Madrid, Spain
| | | | - Ana Ventura
- Servicio de Nefrología, Hospital U. La Fe, Valencia, Spain
| | - Armando Coca
- Servicio de Nefrología, Hospital Clínico U. Valladolid, Spain
| | | | | | - Amir Shabaka
- Servicio de Nefrología, Hospital Fundación Alcorcón, Madrid, Spain
| | - Gabriel Ledesma
- Servicio de Nefrología, Hospital U. Infanta Sofía, Madrid, Spain
| | - Patricia Martínez
- Servicio de Nefrología, Hospital U. Príncipe de Asturias, Madrid, Spain
| | | | | | | | - J Emilio Sánchez
- Servicio de Nefrología, Hospital de Cabueñes, Asturias, Coordinador Registro COVID S.E.N, Spain
| | - Carlos Jiménez
- Servicio de Nefrología, Hospital U. La Paz, Madrid, Spain
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8
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Somasundaram K, Thoppalan B, Chellaiah V, Kumar RPS, Murugesan V, Thirumavalavan S. Clinical characteristics and immunosuppression management in kidney transplant recipients infected with severe acute respiratory syndrome coronavirus 2 infection - An observational study. INDIAN JOURNAL OF TRANSPLANTATION 2022. [DOI: 10.4103/ijot.ijot_68_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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9
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Latief M, Shafi O, Hassan Z, Farooq S, Abbas F. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) in Kidney transplant patients: A case series and literature review. Med J Islam Repub Iran 2021; 35:17. [PMID: 33996668 PMCID: PMC8111648 DOI: 10.47176/mjiri.35.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 11/16/2022] Open
Abstract
COVID-19 is a novel highly contagious disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Immunosuppressed people are at a higher risk for unfavourable outcomes if infected with SARS-CoV-2, as cellular immunity plays a key role in determining the course and outcome in COVID-19. Kidney transplant recipients (KTRs) are thus a distinct subset of the population. We describe our early experience with 2 KTRs requiring hospital admission due to COVID-19 and who recovered well. We conclude that timely intervention in the form of modifying immunosuppression and close monitoring and institution of further measures based on clinical severity is needed in KTRs with COVID-19.
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Affiliation(s)
| | - Obeid Shafi
- Flushing Hospital, Medical Center, New York, USA
| | - Zhahid Hassan
- Consultant Medicine/Endocrinology, GMC, Baramulla, Kashmir, India
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10
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Anton Pampols P, Trujillo H, Melilli E, Urban B, Sandino J, Favá A, Gutierrez E, Bestard O, Mancebo E, Sevillano A, Cruzado JM, Morales E. Immunosuppression minimization in kidney transplant recipients hospitalized for COVID-19. Clin Kidney J 2021; 14:1229-1235. [PMID: 34282376 PMCID: PMC7929031 DOI: 10.1093/ckj/sfab025] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/11/2021] [Indexed: 12/15/2022] Open
Abstract
Background Immunosuppressed patients such as kidney transplant recipients (KTs) have increased mortality risk in the setting of coronavirus disease 2019 (COVID-19). The role and management of chronic immunosuppressive therapies during COVID-19 must be characterized. Methods Herein, we report the follow-up of a cohort of 47 KTs admitted at two Spanish Kidney Transplant Units, who survived COVID-19. The impact of the management of immunosuppression during COVID-19 on graft function and immunologic events was evaluated. Results At least one immunosuppressive agent was withdrawn in 83% of patients, with antimetabolites being the most frequent. Steroids were generally not stopped and the dose was even increased in 15% of patients as part of the treatment of COVID-19. Although immunosuppressive drugs were suspended during a median time of 17 days, no rejection episodes or de novo donor-specific antibodies were observed up to 3 months after discharge, and no significant changes occurred in calculated panel reactive antibodies. Acute graft dysfunction was common (55%) and the severity was related to tacrolimus trough levels, which were higher in patients receiving antivirals. At the end of follow-up, all patients recovered baseline kidney function. Conclusions Our observational study suggests that immunosuppression in KTs hospitalized due to COVID-19 could be safely minimized.
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Affiliation(s)
- Paula Anton Pampols
- Department of Nephrology, IDIBELL, Bellvitge University Hospital, Barcelona, Spain
| | - Hernando Trujillo
- Department of Nephrology, University Hospital "12 de Octubre", Madrid, Spain
| | - Edoardo Melilli
- Department of Nephrology, IDIBELL, Bellvitge University Hospital, Barcelona, Spain
| | - Blanca Urban
- Department of Immunology, Bellvitge University Hospital, Barcelona, Spain
| | - Justo Sandino
- Department of Nephrology, University Hospital "12 de Octubre", Madrid, Spain
| | - Alexandre Favá
- Department of Nephrology, IDIBELL, Bellvitge University Hospital, Barcelona, Spain
| | - Eduardo Gutierrez
- Department of Nephrology, University Hospital "12 de Octubre", Madrid, Spain
| | - Oriol Bestard
- Department of Nephrology, IDIBELL, Bellvitge University Hospital, Barcelona, Spain
| | - Esther Mancebo
- Department of Immunology, University Hospital "12 de Octubre", Madrid, Spain
| | - Angel Sevillano
- Department of Nephrology, University Hospital "12 de Octubre", Madrid, Spain
| | - Josep M Cruzado
- Department of Nephrology, IDIBELL, Bellvitge University Hospital, Barcelona, Spain
| | - Enrique Morales
- Department of Nephrology, University Hospital "12 de Octubre", Madrid, Spain
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11
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Maggiore U, Abramowicz D, Crespo M, Mariat C, Mjoen G, Peruzzi L, Sever MS, Oniscu GC, Hilbrands L, Watschinger B. How should I manage immunosuppression in a kidney transplant patient with COVID-19? An ERA-EDTA DESCARTES expert opinion. Nephrol Dial Transplant 2020; 35:899-904. [PMID: 32441741 PMCID: PMC7313836 DOI: 10.1093/ndt/gfaa130] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 05/04/2020] [Indexed: 12/15/2022] Open
Affiliation(s)
- Umberto Maggiore
- Dipartimento di Medicina e Chrurgia, Università d Parma, UO Nefrologia, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Daniel Abramowicz
- Department of Nephrology, Antwerp University Hospital, Antwerp University, Antwerp, Belgium
| | - Marta Crespo
- Department of Nephrology, Hospital del Mar Barcelona, Barcelona, Spain
| | - Christophe Mariat
- Department of Nephrology, Dialysis, and Renal Transplantation, University North Hospital, Saint Etienne, France
| | - Geir Mjoen
- Department of Transplant Medicine, Oslo University Hospital, Oslo, Norway
| | - Licia Peruzzi
- Pediatric Nephrology Unit, Regina Margherita Children’s Hospital, Turin, Italy
| | - Mehmet Sükrü Sever
- Division of Nephrology, Department of Internal Medicine, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | | | - Luuk Hilbrands
- Department of Nephrology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bruno Watschinger
- Department of Nephrology, Medical University of Vienna, Vienna, Austria
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12
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Metagenomic Next-Generation Sequencing for Identification and Quantitation of Transplant-Related DNA Viruses. J Clin Microbiol 2019; 57:JCM.01113-19. [PMID: 31554674 PMCID: PMC6879295 DOI: 10.1128/jcm.01113-19] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/20/2019] [Indexed: 12/12/2022] Open
Abstract
Infections with DNA viruses are frequent causes of morbidity and mortality in transplant recipients. Infections with DNA viruses are frequent causes of morbidity and mortality in transplant recipients. This study describes the analytical and clinical performance characteristics of the Arc Bio Galileo Pathogen Solution, an all-inclusive metagenomic next-generation sequencing (mNGS) reagent and bioinformatics pipeline that allows the simultaneous quantitation of 10 transplant-related double-stranded DNA (dsDNA) viruses (adenovirus [ADV], BK virus [BKV], cytomegalovirus [CMV], Epstein-Barr virus [EBV], human herpesvirus 6A [HHV-6A], HHV-6B, herpes simplex virus 1 [HSV-1], HSV-2, JC virus [JCV], and varicella-zoster virus [VZV]). The mNGS 95% limit of detection ranged from 14 copies/ml (HHV-6) to 191 copies/ml (BKV), and the lower limit of quantitation ranged from 442 international units (IU)/ml (EBV) to 661 copies/ml (VZV). An evaluation of 50 residual plasma samples with at least one DNA virus detected in prior clinical testing showed a total percent agreement of mNGS and quantitative PCR (qPCR) of 89.2% (306/343), with a κ statistic of 0.725. The positive percent agreement was 84.9% (73/86), and the negative percent agreement was 90.7% (233/257). Furthermore, mNGS detected seven subsequently confirmed coinfections that were not initially requested by qPCR. Passing-Bablok regression revealed a regression line of y = 0.953x + 0.075 (95% confidence interval [CI] of the slope, 0.883 to 1.011; intercept, −0.100 to 0.299), and Bland-Altman analysis (mNGS − qPCR) showed a slight positive bias (0.28 log10 concentration; 95% limits of agreement, −0.62 to 1.18). In conclusion, the mNGS-based Galileo pipeline demonstrates analytical and clinical performance comparable to that of qPCR for transplant-related DNA viruses.
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13
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Herring R, Desai N, Parnes M, Jarjour I. Pediatric West Nile Virus-Associated Neuroinvasive Disease: A Review of the Literature. Pediatr Neurol 2019; 92:16-25. [PMID: 30611518 DOI: 10.1016/j.pediatrneurol.2018.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 07/10/2018] [Accepted: 07/15/2018] [Indexed: 10/27/2022]
Abstract
Over the past two decades, West Nile virus has become the most common arbovirus in North America, leading to several outbreaks and infecting thousands of people. Mosquitos help transmit the virus in the majority of cases, but transmission occurs via blood transfusions, organ transplantation, and possibly pregnancy and breastfeeding. While most infected patients experience mild to no symptoms, thousands of West Nile virus-associated neuroinvasive cases have been reported in the United States, with over 700 cases occurring in children from 2003 to 2016. Neuroinvasive disease presents as meningitis, encephalitis, or acute flaccid paralysis, and carries a high likelihood of poor outcome, including severe neurological disability or death. To date, no pharmacologic treatment has proven effective. Therapeutic clinical trials have not been successfully completed due to the sporadic nature of viral outbreaks and resultant poor study enrollment. Although older age and chronic disease are risk factors for neuroinvasive West Nile virus disease in adults, the specific factors that influence the risk in pediatric populations have not been fully elucidated. This review summarizes the most recent literature regarding West Nile virus-associated neuroinvasive disease, especially as it pertains to the pediatric population. Moreover, the review describes the epidemiology, clinical, laboratory, and radiographic findings, and outlines the various therapies that have been trialed and potential future research directions.
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Affiliation(s)
- Rachelle Herring
- Section of Child Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas.
| | - Nilesh Desai
- Section of Neuroradiology, Department of Radiology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas
| | - Mered Parnes
- Section of Child Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas
| | - Imad Jarjour
- Section of Child Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas
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14
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Freeman MC, Coyne CB, Green M, Williams JV, Silva LA. Emerging arboviruses and implications for pediatric transplantation: A review. Pediatr Transplant 2019; 23:e13303. [PMID: 30338634 DOI: 10.1111/petr.13303] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/29/2018] [Accepted: 09/19/2018] [Indexed: 11/28/2022]
Abstract
Recent years have brought a rise in newly emergent viral infections, primarily in the form of previously known arthropod-transmitted viruses that have increased significantly in both incidence and geographical range. Of particular note are DENV, CHIKV, and ZIKV, which are transmitted mostly by Aedes species of mosquitoes that exhibit a wide and increasing global distribution. Being important pathogens for the general population, these viruses have the potential to be devastating in the international transplant community, with graft rejection and death as possible outcomes of infection. In this review, we discuss the current state of knowledge for these viruses as well as repercussions of infection in the solid organ and HSCT population, with a focus, when possible, on pediatric patients.
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Affiliation(s)
- Megan Culler Freeman
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Carolyn B Coyne
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Michael Green
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - John V Williams
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Laurie A Silva
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
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15
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Ramos Martínez A, Pintos Pascual I, Múñez Rubio E. [Infections in immunocompromised patients (II). The transplanted patient]. Medicine (Baltimore) 2018; 12:3245-3252. [PMID: 32287906 PMCID: PMC7143593 DOI: 10.1016/j.med.2018.04.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Los receptores de los diferentes tipos de trasplante presentan un riesgo elevado de infección. En los trasplantados de precursores hematopoyéticos predominan las infecciones nosocomiales. Durante el periodo posprendimiento temprano (30-100 días tras la infusión del trasplante), la incidencia de infección es más elevada en pacientes con enfermedad de injerto contra huésped. En el pulmón pueden aparecer lesiones nodulares por infección fúngica invasora o bien un patón difuso habitualmente secundario a infección vírica o a neumonía por P. jirovecii. Después de los primeros 100 días persiste un moderado riesgo de infección por microorganismos convencionales y oportunistas, como la infección tardía por CMV. Los avances en las técnicas quirúrgicas y el empleo de calcineurínicos han reducido la mortalidad por infecciones en trasplantados de órgano sólido. Durante el primer mes, son frecuentes las infecciones nosocomiales; entre el primer y sexto mes son más frecuentes las infecciones oportunistas dependientes de la inmunidad celular y a partir de sexto mes el riesgo baja y predominan las infecciones comunitarias semejantes a las de los pacientes inmunocompetentes.
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Affiliation(s)
- A. Ramos Martínez
- Unidad de Enfermedades Infecciosas. Servicio de Medicina Interna. Hospital Universitario Puerta de Hierro. Madrid. España
- Autor para correspondencia.
| | - I. Pintos Pascual
- Servicio de Medicina Interna. Hospital Universitario Fundación Jiménez Díaz. Madrid. España
| | - E. Múñez Rubio
- Unidad de Enfermedades Infecciosas. Servicio de Medicina Interna. Hospital Universitario Puerta de Hierro. Madrid. España
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16
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Abad CL, Razonable RR. Treatment of alpha and beta herpesvirus infections in solid organ transplant recipients. Expert Rev Anti Infect Ther 2016; 15:93-110. [PMID: 27911112 DOI: 10.1080/14787210.2017.1266253] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Human herpesviruses frequently cause infections in solid organ transplant (SOT) recipients. Areas covered: We provide an overview of the clinical impact of alpha and beta herpesviruses and highlight the mechanisms of action, pharmacokinetics, clinical indications, and adverse effects of antiviral drugs for the management of herpes simplex virus, varicella zoster virus and cytomegalovirus. We comprehensively evaluated key clinical trials that led to drug approval, and served as the foundation for management guidelines. We further provide an update on investigational antiviral agents for alpha and beta herpesvirus infections after SOT. Expert commentary: The therapeutic armamentarium for herpes infections is limited by the emergence of drug resistance. There have been major efforts for discovery of new drugs against these viruses, but the results of early-phase clinical trials have been less than encouraging. We believe, however, that more antiviral drug options are needed given the adverse side effects associated with current antiviral agents, and the emergence of drug-resistant virus populations in SOT recipients. Likewise, optimized use and strategies are needed for existing and novel antiviral drugs against alpha and beta-herpesviruses in SOT recipients.
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Affiliation(s)
- C L Abad
- a Division of Infectious Diseases, Department of Medicine , Mayo Clinic , Rochester , MN , USA.,b Department of Medicine, Section of Infectious Diseases , University of the Philippines - Philippine General Hospital , Manila , Philippines
| | - R R Razonable
- a Division of Infectious Diseases, Department of Medicine , Mayo Clinic , Rochester , MN , USA.,c The William J. Von Liebig Center for Transplantation and Clinical Regeneration , Mayo Clinic , Rochester , MN , USA
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17
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Engstrom-Melnyk J, Rodriguez PL, Peraud O, Hein RC. Clinical Applications of Quantitative Real-Time PCR in Virology. METHODS IN MICROBIOLOGY 2015; 42:161-197. [PMID: 38620180 PMCID: PMC7148891 DOI: 10.1016/bs.mim.2015.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Since the invention of the polymerase chain reaction (PCR) and discovery of Taq polymerase, PCR has become a staple in both research and clinical molecular laboratories. As clinical and diagnostic needs have evolved over the last few decades, demanding greater levels of sensitivity and accuracy, so too has PCR performance. Through optimisation, the present-day uses of real-time PCR and quantitative real-time PCR are enumerable. The technique, combined with adoption of automated processes and reduced sample volume requirements, makes it an ideal method in a broad range of clinical applications, especially in virology. Complementing serologic testing by detecting infections within the pre-seroconversion window period and infections with immunovariant viruses, real-time PCR provides a highly valuable tool for screening, diagnosing, or monitoring diseases, as well as evaluating medical and therapeutic decision points that allows for more timely predictions of therapeutic failures than traditional methods and, lastly, assessing cure rates following targeted therapies. All of these serve vital roles in the continuum of care to enhance patient management. Beyond this, quantitative real-time PCR facilitates advancements in the quality of diagnostics by driving consensus management guidelines following standardisation to improve patient outcomes, pushing for disease eradication with assays offering progressively lower limits of detection, and rapidly meeting medical needs in cases of emerging epidemic crises involving new pathogens that may result in significant health threats.
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Affiliation(s)
- Julia Engstrom-Melnyk
- Medical and Scientific Affairs, Roche Diagnostic Corporation, Indianapolis, Indiana, USA
| | - Pedro L Rodriguez
- Medical and Scientific Affairs, Roche Diagnostic Corporation, Indianapolis, Indiana, USA
| | - Olivier Peraud
- Medical and Scientific Affairs, Roche Diagnostic Corporation, Indianapolis, Indiana, USA
| | - Raymond C Hein
- Medical and Scientific Affairs, Roche Diagnostic Corporation, Indianapolis, Indiana, USA
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18
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Wu CZ, Chen XQ, Wang ZY, Pan XD, Bai YH, Yang YR, Zheng SL, Xia P. Simultaneous monitoring of CMV and BKV by quantitative PCR in renal transplant recipients. J Virol Methods 2014; 210:40-4. [PMID: 25261811 DOI: 10.1016/j.jviromet.2014.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 09/11/2014] [Accepted: 09/16/2014] [Indexed: 10/24/2022]
Abstract
Polyomavirus (BKV) and cytomegalovirus (CMV) are associated with renal graft failure. The aim was to establish a quantitative PCR method (Q-PCR) to detect BKV and CMV simultaneously. The conserved sequences of BKV and CMV were amplified and cloned into the plasmids as standards. The sensitivity, specificity and the precision of the assay were evaluated. Q-PCR was used to detect BKV and CMV DNA simultaneously in 480 blood samples of renal transplantation recipients. The sensitivity of the Q-PCR assay to detect BKV or CMV DNA reached 5×10(3)copies/mL. The use of control DNA verified that the assay could specifically detect the target DNA. The precision of the assay to quantify target DNA copies was acceptable (ICV 3.44% for BKV and 2.23% for CMV; differences between batches ICV 4.98% for BKV and 3.76% for CMV). In 480 samples, 130 samples (27.08%) were CMV DNA positive, which was significantly higher than the 64 BKV DNA positive samples (13.33%, p<0.05). BKV or CMV DNA positivity was significantly associated with high concentrations of Tacrolimus (TAC) (p value<0.05). The Q-PCR assay to detect both CMV and BKV DNA simultaneously was developed successfully with high sensitivity, precision, and time-effectiveness for clinical measurement.
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Affiliation(s)
- Cun-Zao Wu
- Transplantation Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Xiao-Qian Chen
- Transplantation Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Zhang-Yang Wang
- Wenzhou Key Laboratory of Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Xiao-Dong Pan
- Wenzhou Key Laboratory of Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Yong-Heng Bai
- Transplantation Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Yi-Rong Yang
- Transplantation Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Shao-Ling Zheng
- Transplantation Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Peng Xia
- Transplantation Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China.
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19
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Florescu DF, Langnas AN, Sandkovsky U. Opportunistic viral infections in intestinal transplantation. Expert Rev Anti Infect Ther 2014; 11:367-81. [DOI: 10.1586/eri.13.25] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Emery VC. Human herpesvirus vaccines and future directions. Am J Transplant 2013; 13 Suppl 3:79-86; quiz 86. [PMID: 23347216 DOI: 10.1111/ajt.12007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 07/10/2012] [Accepted: 07/16/2012] [Indexed: 01/25/2023]
Abstract
Over the last few years there has been an impressive increase in the virological and immunological tools available to detect both human herpesvirus (HHV) and immune control of replication post-solid organ transplantation. This has allowed a greater appreciation of pathogenesis, studies to be designed to evaluate potential vaccines, new approaches adopted for antiviral deployment and the success of interventions to be judged. This chapter aims to summarize the state-of-the-art in vaccine development and look forward to the role that vaccines, immune monitoring, viral kinetics and new antiherpesvirus agents may play in the future management of HHV infections after transplantation.
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Affiliation(s)
- V C Emery
- Department of Infection, University College London, UK and Department of Microbial and Cellular Sciences, University of Surrey, Guildford, UK.
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Abstract
One common sign of human cytomegalovirus infection is altered liver function. Murine cytomegalovirus strain v70 induces a rapid and severe hepatitis in immunocompetent mice that requires the presence of T cells in order to develop. v70 exhibits approximately 10-fold-greater virulence than the commonly used strain K181, resulting in a more severe, sustained, and lethal hepatitis but not dramatically higher viral replication levels. Hepatitis and death are markedly delayed in immunodeficient SCID compared to immunocompetent BALB/c mice. Transfer of BALB/c splenocytes to SCID mice conferred rapid disease following infection, and depletion of either CD4 or CD8 T cells in BALB/c mice reduced virus-induced hepatitis. The frequency of CD8 T cells producing gamma interferon and tumor necrosis factor in response to viral antigen was higher in settings where more severe disease occurred. Thus, virus-specific effector CD8 T cells appear to contribute to lethal virus-induced hepatitis, contrasting their protective role during sublethal infection. This study reveals how protection and disease during cytomegalovirus infection depend on viral strain and dose, as well as the quality of the T cell response.
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Identification of novel HLA class II target epitopes for generation of donor-specific T regulatory cells. Clin Immunol 2012; 145:153-60. [PMID: 23063892 DOI: 10.1016/j.clim.2012.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 09/07/2012] [Accepted: 09/09/2012] [Indexed: 01/26/2023]
Abstract
Therapies capable of generating host T regulatory cells (T(R)) responsive to donor-specific HLA-class II minor histocompatibility antigens have the potential to promote tolerance of a transplanted organ. Our group has developed a novel approach for the identification of potentially therapeutic T(R) target antigens. We perform parallel non-synonymous SNP genotyping of HLA-identical subject pairs to identify peptide variations expressed by only one of the two subjects. Variant peptide pairs are then evaluated for binding a shared HLA-class II allele. Minor peptides predicted to bind HLA-class II with greater affinity than the common variant peptide are tested for HLA class II binding and in vitro induction of suppressive CD4+ T cells. Using this approach we have identified multiple pairs of variant peptides capable of differential binding and induction of suppressive CD4+ T cells. These data demonstrate the feasibility of identifying potentially therapeutic HLA class II minor antigens for generation of donor-specific T(R).
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23
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Current World Literature. Curr Opin Oncol 2012; 24:197-202. [DOI: 10.1097/cco.0b013e32835164ff] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Rare, unusual, and less common virus infections after organ transplantation. Curr Opin Organ Transplant 2011; 16:580-7. [DOI: 10.1097/mot.0b013e32834cdaf2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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