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Hsiung CY, Chen HY, Wang SH, Huang CY. Unveiling the Incidence and Graft Survival Rate in Kidney Transplant Recipients With De Novo Thrombotic Microangiopathy: A Systematic Review and Meta-Analysis. Transpl Int 2024; 37:12168. [PMID: 38323071 PMCID: PMC10844394 DOI: 10.3389/ti.2024.12168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 01/09/2024] [Indexed: 02/08/2024]
Abstract
De novo thrombotic microangiopathy (TMA) is a rare and challenging condition in kidney transplant recipients, with limited research on its incidence and impact on graft survival. This study conducted a systematic review and meta-analysis of 28 cohorts/single-arm studies and 46 case series/reports from database inception to June 2022. In meta-analysis, among 14,410 kidney allograft recipients, de novo TMA occurred in 3.20% [95% confidence interval (CI): 1.93-4.77], with systemic and renal-limited TMA rates of 1.38% (95% CI: 06.5-2.39) and 2.80% (95% CI: 1.27-4.91), respectively. The overall graft loss rate of de novo TMA was 33.79% (95% CI: 26.14-41.88) in meta-analysis. This study provides valuable insights into the incidence and graft outcomes of de novo TMA in kidney transplant recipients.
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Affiliation(s)
- Chien-Ya Hsiung
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Fu Jen Catholic University, New Taipei City, Taiwan
| | - Hsin-Yu Chen
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shih-Han Wang
- Department of Pharmacy, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ching-Ying Huang
- Department of Pharmacy, Kaohsiung Veteran General Hospital, Kaohsiung, Taiwan
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Imanifard Z, Liguori L, Remuzzi G. TMA in Kidney Transplantation. Transplantation 2023; 107:2329-2340. [PMID: 36944606 DOI: 10.1097/tp.0000000000004585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Thrombotic microangiopathy (TMA) is a rare and devastating complication of kidney transplantation, which often leads to graft failure. Posttransplant TMA (PT-TMA) may occur either de novo or as a recurrence of the disease. De novo TMA can be triggered by immunosuppressant drugs, antibody-mediated rejection, viral infections, and ischemia/reperfusion injury in patients with no evidence of the disease before transplantation. Recurrent TMA may occur in the kidney grafts of patients with a history of atypical hemolytic uremic syndrome (aHUS) in the native kidneys. Studies have shown that some patients with aHUS carry genetic abnormalities that affect genes that code for complement regulators (CFH, MCP, CFI) and components (C3 and CFB), whereas in 10% of patients (mostly children), anti-FH autoantibodies have been reported. The incidence of aHUS recurrence is determined by the underlying genetic or acquired complement abnormality. Although treatment of the causative agents is usually the first line of treatment for de novo PT-TMA, this approach might be insufficient. Plasma exchange typically resolves hematologic abnormalities but does not improve kidney function. Targeted complement inhibition is an effective treatment for recurrent TMA and may be effective in de novo PT-TMA as well, but it is necessary to establish which patients can benefit from different therapeutic options and when and how these can be applied.
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Affiliation(s)
- Zahra Imanifard
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Clinical Research Center for Rare Diseases Aldo e Cele Daccò, Ranica, Italy
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Jadoul M, Awan A, Berenguer M, Bruchfeld A, Fabrizi F, Goldberg D, Jia J, Kamar N, Mohamed R, Pessôa M, Pol S, Sise M, Martin P. KDIGO 2022 Clinical Practice Guideline FOR the Prevention, Diagnosis, Evaluation, and Treatment of Hepatitis C in Chronic Kidney Disease. Kidney Int 2022; 102:S129-S205. [PMID: 36410841 DOI: 10.1016/j.kint.2022.07.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 07/27/2022] [Indexed: 11/19/2022]
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Ibrahim ST, Abdelhamid MR, Lewis N, Baddour N, Adam AG. Role of fluid-phase complement system regulation in the development of hepatitis C virus-associated glomerulonephritis. PLoS One 2022; 17:e0276017. [PMID: 36227893 PMCID: PMC9560510 DOI: 10.1371/journal.pone.0276017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/28/2022] [Indexed: 12/03/2022] Open
Abstract
OBJECTIVES It is not known why only some hepatitis C virus (HCV) infected patients develop glomerulonephritis (GN). Therefore, we investigated the role of soluble complement regulators in the development of HCV associated GN. METHODS Patients with HCV associated GN who were admitted to our nephrology unit between July 2016 and July 2018 were recruited to the study (group 1). Two other age and sex matched groups were studied as control groups: patients with HCV without GN (group 2) and healthy HCV negative volunteers (group 3). There were 26 participants in each of the three groups at the end of the recruitment period. An assay of serum fluid-phase complement regulators was performed using enzyme linked immunosorbent assay technique. Three complement single nucleotide polymorphisms (SNPs) were analyzed using real time polymerase chain reaction (Taqman; thermo fisher scientific): rs2230199 and rs1047286 for complement 3 (C3) and rs800292 for complement factor H (CFH). RESULTS Serum levels of complement 4 binding protein (C4BP) were significantly lower in group 1 (median 70 ng/ml) than in groups 2 (median 88.8 ng/ml) and 3 (median 82.8 ng/ml) with p value of 0.007. The minor allele (allele A) of rs800292 for CFH was significantly higher in group 2 and group 3 (G 54% and A 46%) than in group 1 (G 73% and A 27%), p = 0.04. CONCLUSIONS Low C4BP levels are associated with GN in HCV infected patients. In addition, rs800292 SNP in CFH protects against GN in patients with HCV.
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Affiliation(s)
- Sara T. Ibrahim
- Department of Internal Medicine and Nephrology, Faculty of Medicine, Alexandria University, Alexandria, Egypt,* E-mail:
| | | | - Neveen Lewis
- Department of Clinical Pathology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Nahed Baddour
- Department of Pathology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Ahmed G. Adam
- Department of Internal Medicine and Nephrology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
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Wiggins B, Deliwala S, Banno F, Knight K, Minaudo M. Acute Renal Failure and Nephrotic Syndrome Secondary to Collapsing Glomerulopathy Associated With Hepatitis C. Cureus 2022; 14:e23175. [PMID: 35444880 PMCID: PMC9009271 DOI: 10.7759/cureus.23175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2022] [Indexed: 11/05/2022] Open
Abstract
Collapsing glomerulopathy (CG) is a rare variant of focal segmental glomerulosclerosis (FSGS) that commonly presents as nephrotic syndrome in patients. CG is almost always associated with human immunodeficiency virus (HIV) infection but is rarely from other infectious sources such as parvovirus, Epstein-Barr virus, cytomegalovirus, and SARS-CoV-2. CG has also been reported to be related to other etiologies such as genetic disorders, lupus, malignancy, and post-renal transplant but is exceedingly rare when related to hepatitis C virus (HCV). In this report, we describe the case of a patient presenting with nephrotic syndrome secondary to CG caused by newly diagnosed HCV.
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Postural tachycardia syndrome (POTS) and antiphospholipid syndrome (APS): What do we know so far? Rev Neurol (Paris) 2021; 178:306-314. [PMID: 34895744 DOI: 10.1016/j.neurol.2021.10.006] [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: 08/24/2021] [Revised: 10/05/2021] [Accepted: 10/05/2021] [Indexed: 11/21/2022]
Abstract
As part of the non-criteria clinical manifestations, postural orthostatic tachycardia syndrome (POTS), a multisystem autonomic dysfunction, can co-exist with antiphospholipid syndrome (APS). Several pieces of evidence hint on the autoimmune basis of POTS, and its possible association with several autoimmune diseases, including APS. Indeed, the evidence exists in the etiologies, symptomatology, and treatment options. Although infections, viral ones in particular, stress, and pregnancy are etiologies to both POTS and APS, the exact pathophysiological connection is still to be studied taking into consideration the activity of cytokines in both diseases. Nevertheless, certain immunomodulatory treatments used for the catastrophic or obstetrical forms of APS, such as intravenous immunoglobulins (IVIG) and steroids, have been also used for the treatment of POTS resistant to classical treatments. Therefore, our review aims to highlight the association between POTS and APS, shedding light on the common etiologies explaining the pathophysiology of the two disorders, the diagnostic approach to POTS as a possible clinical criterion of APS, and the treatment of APS in the context of treating POTS.
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Affiliation(s)
- Clodoveo Ferri
- University of Modena and Reggio Emilia School of Medicine, Modena, Italy
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Ávila A, Gavela E, Sancho A. Thrombotic Microangiopathy After Kidney Transplantation: An Underdiagnosed and Potentially Reversible Entity. Front Med (Lausanne) 2021; 8:642864. [PMID: 33898482 PMCID: PMC8063690 DOI: 10.3389/fmed.2021.642864] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/22/2021] [Indexed: 01/25/2023] Open
Abstract
Thrombotic microangiopathy is a rare but serious complication that affects kidney transplant recipients. It appears in 0.8–14% of transplanted patients and negatively affects graft and patient survival. It can appear in a systemic form, with hemolytic microangiopathic anemia, thrombocytopenia, and renal failure, or in a localized form, with progressive renal failure, proteinuria, or arterial hypertension. Post-transplant thrombotic microangiopathy is classified as recurrent atypical hemolytic uremic syndrome or de novo thrombotic microangiopathy. De novo thrombotic microangiopathy accounts for the majority of cases. Distinguishing between the 2 conditions can be difficult, given there is an overlap between them. Complement overactivation is the cornerstone of all post-transplant thrombotic microangiopathies, and has been demonstrated in the context of organ procurement, ischemia-reperfusion phenomena, immunosuppressive drugs, antibody-mediated rejection, viral infections, and post-transplant relapse of antiphospholipid antibody syndrome. Although treatment of the causative agents is usually the first line of treatment, this approach might not be sufficient. Plasma exchange typically resolves hematologic abnormalities but does not improve renal function. Complement blockade with eculizumab has been shown to be an effective therapy in post-transplant thrombotic microangiopathy, but it is necessary to define which patients can benefit from this therapy and when and how eculizumab should be used.
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Affiliation(s)
- Ana Ávila
- Nephrology Department, University Hospital Dr. Peset, Valencia, Spain
| | - Eva Gavela
- Nephrology Department, University Hospital Dr. Peset, Valencia, Spain
| | - Asunción Sancho
- Nephrology Department, University Hospital Dr. Peset, Valencia, Spain
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Mukherjee A, Ghosh R, Furment MM. Case Report: COVID-19 Associated Renal Infarction and Ascending Aortic Thrombosis. Am J Trop Med Hyg 2020; 103:1989-1992. [PMID: 32918409 PMCID: PMC7646749 DOI: 10.4269/ajtmh.20-0869] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Following its discovery in Wuhan, China, in December 2019, COVID-19 has attained pandemic status in mere months. It is caused by SARS-CoV-2, an enveloped beta coronavirus. This infection causes a prothrombogenic state by interplay of inflammatory mediators, and endothelial, microvascular, and possible hepatic damage and tissue tropism of the virus. This leads to frequent pulmonary and cerebral thromboembolism as well as occasional involvement of other organs. We present a 71-year-old man who initially presented with 2 weeks of fever, cough, and shortness of breath and was diagnosed with COVID-19 pneumonia. He required readmission due to worsened hypoxia and was later found to have left renal artery thrombosis with left kidney infarction, associated with an ascending aortic thrombus. He was anticoagulated and recovered uneventfully. We suggest that physicians have a high degree of suspicion to diagnose and manage the novel manifestations of this disease.
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Affiliation(s)
- Aveek Mukherjee
- Division of Internal Medicine, Rutgers Robert Wood Johnson Medical School/Saint Peter's University Hospital, New Brunswick, New Jersey
| | - Raisa Ghosh
- Division of Internal Medicine, Rutgers Robert Wood Johnson Medical School/Saint Peter's University Hospital, New Brunswick, New Jersey
| | - Marlene Marte Furment
- Division of Internal Medicine, Rutgers Robert Wood Johnson Medical School/Saint Peter's University Hospital, New Brunswick, New Jersey
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Abstract
INTRODUCTION Hepatitis C virus (HCV) infection is associated with an increased incidence and progression of chronic kidney disease (CKD), as well as higher mortality in CKD and renal transplant patients. Direct acting antiviral agents (DAAs) have revolutionized the treatment of HCV, with viral eradication attained in 90-100% of treated patients. DAAs have an excellent safety and tolerability profile in CKD and renal transplant patients. AREAS COVERED In this review, we discuss the association of HCV with incidence and progression of CKD as well as its effect on outcomes and mortality. We also discuss the available treatment options in patients with CKD and renal transplant and in HCV-associated glomerular disease. EXPERT OPINION The availability of newly available direct acting anti-viral agents has revolutionized the treatment of HCV in persons with advanced CKD and undergoing dialysis. With these regimens, viral eradication can be attained in 90-100% of the treated patients. The safety, tolerability, and efficacy of these drugs in renal transplant patients have also made it possible to use HCV-infected grafts and successful virus eradication at a later stage.
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Affiliation(s)
- Muhammad Umair Khan
- Department of Medicine, Division of Gastroenterology, Hamad Medical Corporation , Doha, Qatar
| | - Mohamed Ibrahim Mahmoud
- Department of Medicine, Division of Gastroenterology, Hamad Medical Corporation , Doha, Qatar
| | - Adeel A Butt
- Weill Cornell Medical College , New York, Qatar.,Department of Medicine, Hamad Medical Corporation , Doha, Qatar
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The Role of Cardiolipin and Mitochondrial Damage in Kidney Transplant. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:3836186. [PMID: 31885786 PMCID: PMC6899302 DOI: 10.1155/2019/3836186] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/27/2019] [Accepted: 09/11/2019] [Indexed: 02/06/2023]
Abstract
Chronic kidney disease (CKD) is highly incident and prevalent in the world. The death of patients with CKD is primarily due to cardiovascular disease. Renal transplantation (RT) emerges as the best management alternative for patients with CKD. However, the incidence of acute renal graft dysfunction is 11.8% of the related living donor and 17.4% of the cadaveric donor. Anticardiolipin antibodies (ACAs) or antiphospholipid antibodies (APAs) are important risk factors for acute renal graft dysfunction. The determination of ACA or APA to candidates for RT could serve as prognostic markers of early graft failure and would indicate which patients could benefit from anticoagulant therapy. Cardiolipin is a fundamental molecule that plays an important role in the adequate conformation of the mitochondrial cristae and the correct assembly of the mitochondrial respiratory supercomplexes and other proteins essential for proper mitochondrial function. Cardiolipin undergoes a nonrandom oxidation process by having pronounced specificity unrelated to the polyunsaturation pattern of its acyl groups. Accumulation of hydroxyl derivatives and cardiolipin hydroperoxides has been observed in the affected tissues, and recent studies showed that oxidation of cardiolipin is carried out by a cardiolipin-specific peroxidase activity of cardiolipin-bound cytochrome c. Cardiolipin could be responsible for the proapoptotic production of death signals. Cardiolipin modulates the production of energy and participates in inflammation, mitophagy, and cellular apoptosis. The determination of cardiolipin or its antibodies is an attractive therapeutic, diagnostic target in RT and kidney diseases.
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12
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Esforzado N, Morales JM. Hepatitis C and kidney transplant: The eradication time of the virus has arrived. Nefrologia 2019; 39:458-472. [PMID: 30905391 DOI: 10.1016/j.nefro.2019.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 01/07/2019] [Accepted: 01/13/2019] [Indexed: 12/11/2022] Open
Abstract
Hepatitis C virus (HCV) infection is a factor that reduces the survival of the patient and the graft in renal transplant (RT). The availability of directly acting antivirals agents (DAAs), very effective and with an excellent safety profile, it allows eradicate HCV from patients with kidney disease, and this is a revolutionary radical change in the natural evolution of this infection, until now without effective and safe treatment for the contraindication use of interferon in kidney transplant patients. The efficiency of some DAAs for all genotypes, even in patients with renal insufficiency constitutes a huge contribution to eradicate HCV in the RT population independently the genotype, severity of kidney failure, progression of liver disease and previous anti HCV therapy. All this is raising, although with controversies, the possibility of use kidneys from infected HCV+ donors for transplant in uninfected receptors and can be treated successfully in the early post-TR, thus increasing the total "pool" of kidneys for RT.
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14
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Goldberg D, Reese PP. Risks, benefits, and ethical questions associated with transplanting kidneys from hepatitis C virus-infected donors into hepatitis C virus-negative patients. Semin Dial 2018; 32:179-186. [DOI: 10.1111/sdi.12767] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- David Goldberg
- Division of Gastroenterology, Department of Medicine; University of Pennsylvania; Philadelphia Pennsylvania
- Department of Biostatistics, Epidemiology, and Informatics; University of Pennsylvania; Philadelphia Pennsylvania
| | - Peter P. Reese
- Department of Biostatistics, Epidemiology, and Informatics; University of Pennsylvania; Philadelphia Pennsylvania
- Division of Renal, Electrolyte, and Hypertension; University of Pennsylvania; Philadelphia Pennsylvania
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Long-term Patient and Graft Survival of Kidney Transplant Recipients With Hepatitis C Virus Infection in the United States. Transplantation 2018; 102:454-460. [PMID: 28976413 DOI: 10.1097/tp.0000000000001953] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Hepatitis C virus (HCV) infection is common among kidney transplant (KTx) recipients. However, the impact of HCV infection on long-term graft and recipient survival after KTx from large-scale data remains to be determined. METHODS We used the Organ Procurement and Transplantation Network database to identify all adults undergoing KTx in 2004 to 2006 in the United States. A propensity score was created to match each HCV-positive recipient with an HCV-negative control for unbiased comparisons. Survival analysis was conducted to evaluate recipient and death-censored graft survival. RESULTS Out of 33 357 adult primary KTx recipients, 1470 (4.4%) were HCV-positive: 1364 HCV-positive and -negative pairs were selected by propensity score matching. Based on multivariable regression models, HCV is associated with a higher risk of death (hazard ratio [HR], 1.50; 95% confidence interval [95% CI], 1.28-1.75) and graft failure (HR, 1.26; 95% CI, 1.08-1.47). Infection was a more common cause of death in HCV-positive patients than in HCV-negative recipients (HR, 1.64; 95% CI, 1.12-2.42). The incidence of death due to liver failure was 0.23% per year among HCV-positive recipients, whereas no HCV-negative recipients died from liver failure. Graft failure due to recurrent disease was higher in HCV-positive than in HCV-negative recipients (HR, 2.00; 95% CI, 1.06-3.78). CONCLUSION HCV infection is associated with decreased long-term recipient and graft survival. Future studies are needed to examine whether recently available, safe, and effective antiviral therapy improves the long-term clinical outcome in these patients.
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KDIGO 2018 Clinical Practice Guideline for the Prevention, Diagnosis, Evaluation, and Treatment of Hepatitis C in Chronic Kidney Disease. Kidney Int Suppl (2011) 2018; 8:91-165. [PMID: 30675443 PMCID: PMC6336217 DOI: 10.1016/j.kisu.2018.06.001] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Tsuchimoto A, Matsukuma Y, Ueki K, Nishiki T, Doi A, Okabe Y, Nakamura M, Tsuruya K, Nakano T, Kitazono T, Masutani K. Thrombotic microangiopathy associated with anticardiolipin antibody in a kidney transplant recipient with polycythemia. CEN Case Rep 2018; 8:1-7. [PMID: 30073489 DOI: 10.1007/s13730-018-0354-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 07/17/2018] [Indexed: 11/24/2022] Open
Abstract
Thrombotic microangiopathy (TMA) develops from various etiologies, and it is often difficult to distinguish the etiology of TMA in kidney transplantation. Antiphospholipid syndrome (APS) is one of the differential diagnoses for TMA that may cause acute loss of graft function or fatal thrombotic complications. This report details a 66-year-old male patient with polycythemia after ABO-incompatible kidney transplantation. Antibody screening tests were negative before transplant. Despite administration of an adequate desensitization therapy including plasmapheresis and rituximab, he developed acute graft dysfunction on postoperative day 112 and graft biopsy revealed prominent microvascular inflammation in the glomerular capillaries without immunoglobulin deposits. Flow cytometric panel-reactive antibody screening failed to detect donor-specific antibodies at both pre-transplant and episode biopsies. Anticardiolipin antibody was repeatedly positive, but neither thrombosis nor previous thrombotic episodes were detected. After excluding several differential diagnoses, the graft dysfunction with unexplained TMA was treated with steroid pulse, plasmapheresis and rituximab re-induction. Anticardiolipin antibody disappeared after this intensive treatment and graft function recovered gradually and stabilized for 52 months. This report suggests that asymptomatic anticardiolipin antibody may be associated with acute graft dysfunction. Even if thrombotic episodes are not observed, an exist of anticardiolipin antibody may be one of the risk factors of renal TMA after kidney transplantation.
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Affiliation(s)
- Akihiro Tsuchimoto
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yuta Matsukuma
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kenji Ueki
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takehiro Nishiki
- Department of Surgery, Fukuoka Red Cross Hospital, Fukuoka, Japan
| | - Atsushi Doi
- Department of Surgery and Oncology, Kyushu University, Fukuoka, Japan
| | - Yasuhiro Okabe
- Department of Surgery and Oncology, Kyushu University, Fukuoka, Japan
| | - Masafumi Nakamura
- Department of Surgery and Oncology, Kyushu University, Fukuoka, Japan
| | - Kazuhiko Tsuruya
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Toshiaki Nakano
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. .,Department of Integrated Therapy for Chronic Kidney Disease, Kyushu University, Fukuoka, Japan.
| | - Takanari Kitazono
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kosuke Masutani
- Division of Nephrology and Rheumatology, Department of Internal Medicine, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
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Gastrointestinal pathogens in anti-FH antibody positive and negative Hemolytic Uremic Syndrome. Pediatr Res 2018; 84:118-124. [PMID: 29795200 DOI: 10.1038/s41390-018-0009-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 03/06/2018] [Accepted: 03/17/2018] [Indexed: 11/08/2022]
Abstract
BACKGROUND Prodromal symptoms are frequently reported in the atypical form of Hemolytic uremic syndrome (aHUS) suggesting implication of infectious triggers. Some pathogens may also play a role in the mechanisms of production of autoantibody directed against Factor H (FH), a complement regulator, leading to aHUS. METHODS The presence of 15 gastrointestinal (GI) pathogens was investigated by using xTAG-based multiplex PCR techniques on stools collected at the acute phase in a cohort of Indian HUS children classified according to the presence or absence of anti-FH autoantibodies. RESULTS Prevalence of pathogens in patients with anti-FH antibody (62.5%) was twice that in those without (31.5%). Different pathogens were detected, the most frequent being Clostridium difficile, Giardia intestinalis, Salmonella, Shigella, Rotavirus, Norovirus and Entamoeba histolytica. No stool was positive for Shigatoxin. CONCLUSION This study reveals a higher prevalence of GI pathogens in anti-FH positive than in negative patients. No single pathogen was implicated exclusively in one form of HUS. These pathogens may play a role in the disease initiation by inducing complement activation or an autoimmune response.
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Kim SM, Song IH. Hepatitis C virus infection in chronic kidney disease: paradigm shift in management. Korean J Intern Med 2018; 33:670-678. [PMID: 29961309 PMCID: PMC6030406 DOI: 10.3904/kjim.2018.202] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 06/17/2018] [Indexed: 12/14/2022] Open
Abstract
Hepatitis C virus (HCV) infection in chronic kidney disease (CKD) is associated with increased liver-related morbidity and mortality rates, accelerated progression to end-stage renal disease, and risk of cardiovascular events. CKD patients with HCV infection require antiviral therapy. Pegylated interferon (peg-IFN) plus ribavirin was the standard of care for HCV-infected CKD patients before the introduction of first-generation direct-acting antiviral (DAA) oral anti-HCV agents. Peg-IFN-based treatment has a low virologic response rate and poor compliance, resulting in a high dropout rate. Recently, several clinical trials of all-DAA combination regimens have reported excellent antiviral efficacy and few adverse drug reactions in HCV-infected patients with CKD. These positive results have revolutionized the treatment of chronic HCV infection in this population. In this review, we address the impact of chronic HCV infection in CKD patients, and discuss their management using next-generation DAAs.
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Affiliation(s)
- So Mi Kim
- Division of Nephrology, Department of Internal Medicine, Dankook University Hospital, Cheonan, Korea
| | - Il Han Song
- Division of Hepatology, Department of Internal Medicine, Dankook University Hospital, Cheonan, Korea
- Correspondence to Il Han Song, M.D. Division of Hepatology, Department of Internal Medicine, Dankook University Hospital, 201 Manghyang-ro, Dongnam-gu, Cheonan 31116, Korea Tel: +82-41-5503924 Fax: +82-41-5563256 E-mail:
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Transplant glomerulopathy. Mod Pathol 2018; 31:235-252. [PMID: 29027535 DOI: 10.1038/modpathol.2017.123] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/28/2017] [Accepted: 08/10/2017] [Indexed: 12/13/2022]
Abstract
In the renal allograft, transplant glomerulopathy represents a morphologic lesion and not a specific diagnosis. The hallmark pathologic feature is glomerular basement membrane reduplication by light microscopy or electron microscopy in the absence of immune complex deposits. Transplant glomerulopathy results from chronic, recurring endothelial cell injury that can be mediated by HLA alloantibodies (donor-specific antibodies), various autoantibodies, cell-mediated immune injury, thrombotic microangiopathy, or chronic hepatitis C. Clinically, transplant glomerulopathy may be silent, detectable on protocol biopsy, or present with overt manifestations, including up to nephrotic range proteinuria, hypertension, and declining glomerular filtration rate. In either case, transplant glomerulopathy is associated with reduced graft survival. This review details the morphologic features of transplant glomerulopathy found on light microscopy, immunofluorescence microscopy, and electron microscopy. The pathophysiology of the causes and risk factors are discussed. Clinical manifestations are emphasized and potential therapeutic modalities are examined.
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. EXP CLIN TRANSPLANT 2017; 15. [DOI: 10.6002/ect.2017.0104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Garg N, Rennke HG, Pavlakis M, Zandi-Nejad K. De novo thrombotic microangiopathy after kidney transplantation. Transplant Rev (Orlando) 2017; 32:58-68. [PMID: 29157988 DOI: 10.1016/j.trre.2017.10.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Revised: 10/22/2017] [Accepted: 10/23/2017] [Indexed: 12/14/2022]
Abstract
Thrombotic microangiopathy (TMA) is a serious complication of transplantation that adversely affects kidney transplant recipient and allograft survival. Post-transplant TMA is usually classified into two categories: 1) recurrent TMA and 2) de novo TMA. Atypical hemolytic uremic syndrome (aHUS) resulting from dysregulation and over-activation of the alternate complement pathway is a rare disease but the most common diagnosis associated with recurrence in the allografts. De novo TMA, on the other hand, represents an overwhelming majority of the cases of post-transplant TMA and is a substantially more heterogeneous entity than recurrent aHUS. Here, we review the etio-pathogenesis, diagnosis and treatment options for de novo post-transplant TMA. It is usually in the setting of calcineurin inhibitor use, mammalian target of rapamycin inhibitor use, or antibody mediated rejection; recently genetic mutations in complement regulatory genes for Factor H and Factor I similar to those described in aHUS have been reported in up to a third of these patients. Systemic signs of TMA are frequently absent, and a renal allograft biopsy is often needed to establish the diagnosis. Although withdrawal of the offending agents is usually the first line of treatment and resolution of laboratory abnormalities has been documented with this approach in several case reports and case series, available retrospective data demonstrate lack of benefit in long-term graft outcomes. Co-stimulation blockage with belatacept provides an effective alternate immunosuppressive strategy for these patients. Anti-complement therapy with eculizumab is effective in some cases; further work is required to define which patients with TMA (with and without concomitant antibody-mediated rejection) would benefit from receiving this treatment, and what biomarkers can be used to identify them.
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Affiliation(s)
- Neetika Garg
- Department of Medicine, Nephrology Division, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA 02215, United States.
| | - Helmut G Rennke
- Department of Pathology, Brigham and Women's Hospital/Harvard Medical School, Boston, MA 02115, United States
| | - Martha Pavlakis
- Department of Medicine, Nephrology Division, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA 02215, United States
| | - Kambiz Zandi-Nejad
- Department of Medicine, Nephrology Division, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA 02215, United States
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Barsoum RS, William EA, Khalil SS. Hepatitis C and kidney disease: A narrative review. J Adv Res 2017; 8:113-130. [PMID: 28149647 PMCID: PMC5272932 DOI: 10.1016/j.jare.2016.07.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/07/2016] [Accepted: 07/17/2016] [Indexed: 02/07/2023] Open
Abstract
Hepatitis-C (HCV) infection can induce kidney injury, mostly due to formation of immune-complexes and cryoglobulins, and possibly to a direct cytopathic effect. It may cause acute kidney injury (AKI) as a part of systemic vasculitis, and augments the risk of AKI due to other etiologies. It is responsible for mesangiocapillary or membranous glomerulonephritis, and accelerates the progression of chronic kidney disease due to other causes. HCV infection increases cardiovascular and liver-related mortality in patients on regular dialysis. HCV-infected patients are at increased risk of acute post-transplant complications. Long-term graft survival is compromised by recurrent or de novo glomerulonephritis, or chronic transplant glomerulopathy. Patient survival is challenged by increased incidence of diabetes, sepsis, post-transplant lymphoproliferative disease, and liver failure. Effective and safe directly acting antiviral agents (DAAs) are currently available for treatment at different stages of kidney disease. However, the relative shortage of DAAs in countries where HCV is highly endemic imposes a need for treatment-prioritization, for which a scoring system is proposed in this review. It is concluded that the thoughtful use of DAAs, will result in a significant change in the epidemiology and clinical profiles of kidney disease, as well as improvement of dialysis and transplant outcomes, in endemic areas.
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Affiliation(s)
- Rashad S. Barsoum
- Kasr-El-Aini Medical School, Cairo University, Cairo, Egypt
- The Cairo Kidney Center, Cairo, Egypt
| | - Emad A. William
- The Cairo Kidney Center, Cairo, Egypt
- National Research Centre, Cairo, Egypt
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Gheith O, Halim MA, Othman N, Al-Otaibi T, Nair P, Nampoory N. Hepatitis C Virus in the Renal Transplant Population: An Update With Focus on the New Era of Antiviral Regimens. EXP CLIN TRANSPLANT 2016; 15:10-20. [PMID: 27915966 DOI: 10.6002/ect.2015.0341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Chronic hepatitis C virus infection is a global health problem, especially among renal transplant recipients. Herein, we present an overview of hepatitis C virus among renal transplant patients, with a focus on some updated aspects concerning types of viral genotypes, methods of diagnosis, the effects of renal transplant on hepatitis C virus infection, and summary of hepatitis C virus-related complications after renal transplant. We also discuss patient and graft survival rates and the present and future therapeutic options with special focus on new antiviral and possible interactions with immunosuppressive medications.
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Affiliation(s)
- Osama Gheith
- From the Urology and Nephrology Center, Mansoura University, Mansoura, Egypt; and the Hamed Al-Essa Organ Transplant Center, Kuwait
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Fabrizi F, Martin P, Cacoub P, Messa P, Donato FM. Treatment of hepatitis C-related kidney disease. Expert Opin Pharmacother 2015; 16:1815-27. [DOI: 10.1517/14656566.2015.1066333] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Ambrosino P, Lupoli R, Tarantino P, Di Minno A, Tarantino L, Di Minno MND. Viral hepatitis and anti-phospholipid antibodies positivity: A systematic review and meta-analysis. Dig Liver Dis 2015; 47:478-87. [PMID: 25835772 DOI: 10.1016/j.dld.2015.03.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 03/04/2015] [Accepted: 03/09/2015] [Indexed: 02/09/2023]
Abstract
BACKGROUND Anti-phospholipid antibodies positivity is associated with several clinical conditions, including infectious diseases. AIMS We performed a meta-analysis evaluating the association of hepatitis B and C with anti-phospholipid antibody positivity and with anti-phospholipid antibody-related thrombotic complications. METHODS Studies evaluating the association of viral hepatitis with anti-cardiolipin, anti-β2 glycoprotein-I and lupus anticoagulant antibodies and anti-phospholipid antibody-related thrombotic events were systematically searched. RESULTS 20 studies (2319 cases, 1901 controls) were included. The analyses showed that viral hepatitis is associated with the presence of anti-cardiolipin and anti-β2 glycoprotein-I antibodies. The association with anticardiolipin antibodies was confirmed in both hepatitis B (OR 11.22, 95% CI: 6.68-18.84) and hepatitis C (OR 11.26, 95% CI: 6.82-18.59). Similarly, compared to controls, anti-β2 glycoprotein-I antibodies were found more frequently in hepatitis B (OR 14.07, 95% CI: 3.06-64.66) and hepatitis C (OR 5.64, 95% CI: 1.69-18.77). Moreover, 11 studies (257 cases, 1079 controls) showed a higher prevalence of venous and/or arterial thrombosis in patients with hepatitis and anti-cardiolipin antibody positivity compared hepatitis alone (OR 3.29, 95% CI: 1.79-6.07). This result was consistently confirmed in hepatitis C (OR 3.64, 95% CI: 1.78-7.46) but not in hepatitis B. CONCLUSIONS Viral hepatitis is significantly associated with anti-phospholipid antibody positivity and with anti-phospholipid antibody-related thrombotic complications.
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Affiliation(s)
- Pasquale Ambrosino
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Roberta Lupoli
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Paolo Tarantino
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Alessandro Di Minno
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Luciano Tarantino
- Department of Surgery, Interventional Hepatology Unit, Andrea Tortora Hospital, Pagani, Italy
| | - Matteo Nicola Dario Di Minno
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy; Unit of Cell and Molecular Biology in Cardiovascular Diseases, Centro Cardiologico Monzino, IRCCS, Milan, Italy.
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Nester CM, Barbour T, de Cordoba SR, Dragon-Durey MA, Fremeaux-Bacchi V, Goodship THJ, Kavanagh D, Noris M, Pickering M, Sanchez-Corral P, Skerka C, Zipfel P, Smith RJH. Atypical aHUS: State of the art. Mol Immunol 2015; 67:31-42. [PMID: 25843230 DOI: 10.1016/j.molimm.2015.03.246] [Citation(s) in RCA: 191] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 03/11/2015] [Accepted: 03/12/2015] [Indexed: 12/12/2022]
Abstract
Tremendous advances in our understanding of the thrombotic microangiopathies (TMAs) have revealed distinct disease mechanisms within this heterogeneous group of diseases. As a direct result of this knowledge, both children and adults with complement-mediated TMA now enjoy higher expectations for long-term health. In this update on atypical hemolytic uremic syndrome, we review the clinical characteristics; the genetic and acquired drivers of disease; the broad spectrum of environmental triggers; and current diagnosis and treatment options. Many questions remain to be addressed if additional improvements in patient care and outcome are to be achieved in the coming decade.
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Affiliation(s)
- Carla M Nester
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA; Division of Nephrology, Stead Family Department of Pediatrics, Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Thomas Barbour
- Centre for Complement and Inflammation Research, Department of Medicine, Imperial College, London W12 0NN, UK
| | | | - Marie Agnes Dragon-Durey
- Assistance Publique - Hopitaux de Paris, Service d'Immunologie Biologique, Hopital Europeen Georges Pompidou, Paris, France
| | - Veronique Fremeaux-Bacchi
- Assistance Publique - Hopitaux de Paris, Service d'Immunologie Biologique, Hopital Europeen Georges Pompidou, Paris, France
| | - Tim H J Goodship
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - David Kavanagh
- Assistance Publique - Hopitaux de Paris, Service d'Immunologie Biologique, Hopital Europeen Georges Pompidou, Paris, France
| | - Marina Noris
- IRCCS - Istituto di Ricerche Farmacologiche "Mario Negri", Clinical Research Center for Rare Diseases "Aldo e Cele Daccò", Ranica, Bergamo, Italy
| | - Matthew Pickering
- Centre for Complement and Inflammation Research, Department of Medicine, Imperial College, London W12 0NN, UK
| | - Pilar Sanchez-Corral
- Unidad de Investigación and Ciber de Enfermedades Raras, Hospital Universitario de La Paz_IdiPAZ, Paseo de la Castellana 261, 28046 Madrid, Spain
| | - Christine Skerka
- Leibniz Institute for Natural Product Research and Infection Biology, Jena, Germany
| | - Peter Zipfel
- Leibniz Institute for Natural Product Research and Infection Biology, Jena, Germany; Friedrich Schiller University, Jena, Germany
| | - Richard J H Smith
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA; Division of Nephrology, Stead Family Department of Pediatrics, Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
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Barbour TD, Crosthwaite A, Chow K, Finlay MJ, Better N, Hughes PD, Cohney SJ. Antiphospholipid syndrome in renal transplantation. Nephrology (Carlton) 2014; 19:177-85. [PMID: 24548061 DOI: 10.1111/nep.12217] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2014] [Indexed: 12/19/2022]
Abstract
Antiphospholipid syndrome (APS) may occur in isolation or in association with systemic lupus erythematosus (SLE), with the potential to cause renal failure via several distinct pathologies. Renal transplantation in the presence of APS carries a risk of early graft loss from arterial or venous thrombosis, or thrombotic microangiopathy (TMA). Whilst perioperative anticoagulation reduces the risk of large vessel thrombosis, it may result in significant haemorrhage, and its efficacy in preventing post-transplant TMA is uncertain. Here, we report a patient with end-stage kidney disease (ESKD) due to lupus nephritis and APS, in whom allograft TMA developed soon after transplantation despite partial anticoagulation. TMA resolved with plasma exchange-based therapy albeit with some irreversible graft damage and renal impairment. We discuss the differential diagnosis of post-transplant TMA, and current treatment options.
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Affiliation(s)
- Thomas D Barbour
- Department of Nephrology, Royal Melbourne Hospital, Melbourne, Victoria, Australia
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Haas M. Transplant glomerulopathy: the view from the other side of the basement membrane. J Am Soc Nephrol 2014; 26:1235-7. [PMID: 25388221 DOI: 10.1681/asn.2014090945] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Mark Haas
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
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31
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Baid-Agrawal S, Pascual M, Moradpour D, Somasundaram R, Muche M. Hepatitis C virus infection and kidney transplantation in 2014: what's new? Am J Transplant 2014; 14:2206-20. [PMID: 25091274 DOI: 10.1111/ajt.12835] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/15/2014] [Accepted: 05/16/2014] [Indexed: 01/25/2023]
Abstract
Chronic hepatitis C virus (HCV) infection remains an important health problem, which is associated with deleterious consequences in kidney transplant recipients. Besides hepatic complications, several extrahepatic complications contribute to reduced patient and allograft survival in HCV-infected kidney recipients. However, HCV infection should not be considered as a contraindication for kidney transplantation because patient survival is better with transplantation than on dialysis. Treatment of HCV infection is currently interferon-alpha (IFN-α) based, which has been associated with higher renal allograft rejection rates. Therefore, antiviral treatment before transplantation is preferable. As in the nontransplant setting, IFN-free treatment regimens, because of their greater efficacy and reduced toxicity, currently represent promising and attractive therapeutic options after kidney transplantation as well. However, clinical trials will be required to closely evaluate these regimens in kidney recipients. There is also a need for prospective controlled studies to determine the optimal immunosuppressive regimens after transplantation in HCV-infected recipients. Combined kidney and liver transplantation is required in patients with advanced liver cirrhosis. However, in patients with cleared HCV infection and early cirrhosis without portal hypertension, kidney transplantation alone may be considered. There is some agreement about the use of HCV-positive donors in HCV-infected recipients, although data regarding posttransplant survival rates are controversial.
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Affiliation(s)
- S Baid-Agrawal
- Department of Nephrology and Medical Intensive Care, Campus Virchow-Klinikum, Charité Universitaetsmedizin Berlin, Berlin, Germany
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Haas M. Emerging Concepts and Controversies in Renal Pathology: C4d-Negative and Arterial Lesions as Manifestations of Antibody-Mediated Transplant Rejection. Surg Pathol Clin 2014; 7:457-467. [PMID: 26837450 DOI: 10.1016/j.path.2014.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The consensus classification of antibody-mediated rejection (AMR) of renal allografts developed at the Sixth Banff Conference on Allograft Pathology, in 2001, identified three findings necessary for the diagnosis of active AMR: histologic evidence, antibodies against the graft, and capillary C4d deposition. Morphologic and molecular studies have noted evidence of microvascular injury, which, in the presence of donor-specific antibodies (DSAs) but the absence of C4d deposition, is associated with development of transplant glomerulopathy and graft loss. Recent studies suggest that intimal arteritis may in some cases be a manifestation of DSA-induced graft injury. These newly recognized lesions of AMR have now been incorporated into a revised Banff diagnostic schema.
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Affiliation(s)
- Mark Haas
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA 90048, USA.
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Prasad D, Agarwal D, Malhotra V, Mathur M, Garsa R, Gandhi K, Beniwal P. Successful outcome of tacrolimus-associated thrombotic microangiopathy in renal transplant recipient with plasmapharesis. INDIAN JOURNAL OF TRANSPLANTATION 2014. [DOI: 10.1016/j.ijt.2014.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract
PURPOSE OF REVIEW The diagnosis of thrombotic microangiopathy (TMA) is complex and often difficult. This review provides an approach to the diagnosis with emphasis on recent relevant developments. RECENT FINDINGS There is increasing evidence that most cases of recurrent TMA in renal allografts are secondary to mutations in genes encoding complement regulatory factors and complement components, such as factor H, factor I, membrane cofactor protein, C3, and others. Genetic work-up for these potential complement abnormalities is now available and recommended. Another important cause for recurrent TMA is the presence of autoantibodies, such as antibodies to factor H and antiphospholipid antibodies. De-novo TMA is much more common than recurrent TMA in renal allografts. De-novo TMA can be secondary to calcineurin inhibitor treatment, mammalian target of rapamycin inhibitor treatment, but frequently also to antibody-mediated rejection and less commonly to infections. Systemic signs of TMA are often absent, and the gold standard for diagnosis is the renal allograft biopsy. Unfortunately, diagnostic criteria for TMA are somewhat subjective, and the biopsy provides limited information regarding the exact underlying cause. SUMMARY TMA is a serious complication of renal transplantation, usually with poor outcome. However, with improving understanding of underlying pathogeneses, more effective disease-specific therapeutic interventions can be designed. Appropriate treatment depends on the correct diagnosis, which relies primarily on renal allograft biopsy. Standardization of pathologic criteria and introduction of new molecular testing methods in renal biopsy specimens hopefully will improve diagnostic accuracy.
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Burra P, Rodríguez-Castro KI, Marchini F, Bonfante L, Furian L, Ferrarese A, Zanetto A, Germani G, Russo FP, Senzolo M. Hepatitis C virus infection in end-stage renal disease and kidney transplantation. Transpl Int 2014; 27:877-91. [PMID: 24853721 DOI: 10.1111/tri.12360] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/02/2014] [Accepted: 05/12/2014] [Indexed: 12/18/2022]
Abstract
Liver disease secondary to chronic hepatitis C virus (HCV) infection is an important cause of morbidity and mortality in patients with end-stage renal disease (ESRD) on renal replacement therapy and after kidney transplantation (KT). Hemodialytic treatment (HD) for ESRD constitutes a risk factor for bloodborne infections because of prolonged vascular access and the potential for exposure to infected patients and contaminated equipment. Evaluation of HCV-positive/ESRD and HCV-positive/KT patients is warranted to determine the stage of disease and the appropriateness of antiviral therapy, despite such treatment is challenging especially due to tolerability issues. Antiviral treatment with interferon (IFN) is contraindicated after transplantation due to the risk of rejection, and therefore, treatment is recommended before KT. Newer treatment strategies of direct-acting antiviral agents in combination are revolutionizing HCV therapy, as a result of encouraging outcomes streaming from recent studies which report increased sustained viral response, low or no resistance, and good safety profiles, including preservation of renal function. KT has been demonstrated to yield better outcomes with respect to remaining on HD although survival after KT is penalized by the presence of HCV infection with respect to HCV-negative transplant recipients. Therefore, an appropriate, comprehensive, easily applicable set of clinical practice management guidelines is necessary in both ESRD and KT patients with HCV infection and HCV-related liver disease.
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Affiliation(s)
- Patrizia Burra
- Multivisceral Transplant Unit, Department of Surgery, Oncology and Gastroenterology, Padua University Hospital, Padua, Italy
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Abstract
Hemolytic uremic syndrome (HUS) is a triad of microangiopathic hemolytic anemia, thrombocytopenia, and acute renal failure. The atypical form of HUS is a disease characterized by complement overactivation. Inherited defects in complement genes and acquired autoantibodies against complement regulatory proteins have been described. Incomplete penetrance of mutations in all predisposing genes is reported, suggesting that a precipitating event or trigger is required to unmask the complement regulatory deficiency. The underlying genetic defect predicts the prognosis both in native kidneys and after renal transplantation. The successful trials of the complement inhibitor eculizumab in the treatment of atypical HUS will revolutionize disease management.
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Affiliation(s)
- David Kavanagh
- The Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK.
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Sreedharanunni S, Joshi K, Duggal R, Nada R, Minz M, Sakhuja V. An analysis of transplant glomerulopathy and thrombotic microangiopathy in kidney transplant biopsies. Transpl Int 2014; 27:784-92. [PMID: 24684170 DOI: 10.1111/tri.12331] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Revised: 10/29/2013] [Accepted: 03/28/2014] [Indexed: 11/27/2022]
Abstract
Glomerular diseases of the transplanted kidney are the most important cause of poor long- term outcome. The estimation of the magnitude of this problem and an elucidation of pathogenic mechanism is essential for improvement of graft survival. This study from the Indian subcontinent aims (i) to determine the incidence of transplant glomerulopathy (TG) and thrombotic microangiopathy (TMA) in a large cohort of indicated renal transplant biopsies, (ii) to evaluate the histological and ultrastructural features of TG and TMA, and (iii) to assess the relationship between the two glomerular lesions. Of a total of 1792 indication renal transplant biopsies received over 5 years (2006-2010), 266 biopsies (of 249 patients) had significant glomerular pathology and were further analyzed along with immunofluorescence, electron microscopy (EM), and C4d immunohistochemistry. TG is the most common glomerular lesion followed by TMA seen in 5.97% and 5.08% of allograft biopsies, respectively, which constitutes 40.23% and 34.2% of biopsies with significant glomerular lesions. Pathologic antibody-mediated rejection (AMR) is associated with both TG and TMA in 71% and 46.5%, respectively. A coexistent TG was found in 18.4% of biopsies with TMA. Endothelial swelling with subendothelial widening, a feature of TMA, is also seen in early TG by EM. Our findings support the concept that TG evolves from a smoldering TMA of various causes.
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Affiliation(s)
- Sreejesh Sreedharanunni
- Department of Histopatholology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Radha S, Tameem A, Sridhar G, Aiyangar A, Rajaram KG, Prasad R, Kiran K. Thrombotic microangiopathy in renal allografts. Indian J Nephrol 2014; 24:24-7. [PMID: 24574627 PMCID: PMC3927186 DOI: 10.4103/0971-4065.125052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Thrombotic microangiopathy (TMA) is a serious complication of renal transplantation. It is a morphological expression of various etiological factors. In a renal allograft, TMA can occur de novo or be a recurrent disease. The aim of this study was to analyze the etiological factors and observe the changing trends of TMA with respect to emerging new etiological factors. We evaluated 131 graft biopsies over a period of 2½ years (2010-2012). All the renal biopsies were formalin fixed, paraffin embedded. Twenty serial sections were studied. Stains routinely used were Hematoxylin and Eosin, Periodic Acid Schiff, Massons Trichrome and Silver Methenamine stains. C4d by immunohistochemical method was done on all graft biopsies. Incidence of TMA in our series was 9.1%. Out of the 12 cases, five were associated with calcineurin inhibitor toxicity, three were diagnosed as acute antibody-mediated rejection, and two were recurrent haemolytic uremic syndrome. One patient developed haemolytic uremic syndrome on treatment with sirolimus and one patient was cytomegalovirus positive on treatment with ganciclovir, developed haemolytic uremic syndrome during treatment course. This study describes a spectrum of etiological factors for thrombotic mciroangiopathy ranging from common cause like calcineurin inhibitor toxicity to rare cause like ganciclovir induced TMA.
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Affiliation(s)
- S Radha
- Consultant, Department of Pathology, Aware Global Hospitals, Visakhapatnam, India
| | - Afroz Tameem
- Consultant, Department of Pathology, Aware Global Hospitals, Visakhapatnam, India
| | - G Sridhar
- Department of Nephrology, Aware Global Hospitals, Consultant, Visakhapatnam, India
| | - A Aiyangar
- Department of Nephrology, Aware Global Hospitals, Consultant, Visakhapatnam, India
| | - K G Rajaram
- Consultant, Department of Nephrologist, Hyderabad Kidney and Laparoscopic Centre, Visakhapatnam, India
| | - R Prasad
- Professor of Nephrology, Andhra Medical College and King George Hospital, Visakhapatnam, India
| | - K Kiran
- Consultant Nephrologist, Kamineni Hospitals, Hyderabad, India
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Rostaing L, Izopet J, Kamar N. Hepatitis C virus infection in nephrology patients. J Nephropathol 2013; 2:217-33. [PMID: 24475454 PMCID: PMC3891131 DOI: 10.12860/jnp.2013.36] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Accepted: 12/29/2012] [Indexed: 12/19/2022] Open
Abstract
CONTEXT Hepatitis C virus (HCV) infection leads to chronic liver disease, but also to extra-hepatic manifestations. EVIDENCE ACQUISITIONS Directory of Open Access Journals (DOAJ), Google Scholar, Pubmed (NLM), LISTA (EBSCO) and Web of Science have been searched. RESULTS Herein, we provide an overview of renal diseases related to HCV and their therapies, as well as the treatment options available for HCV (+)/RNA (+) dialysis patients. We will not mention, however, HCV infection-related complications in the post-kidney transplantation setting. CONCLUSIONS Extra-hepatic manifestations of HCV infection include mixed cryoglobulinemia, lymphoproliferative disorders, and renal disease. HCV infection has been reported in association with distinct histological patterns of glomerulonephritis in native kidneys.
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Affiliation(s)
- Lionel Rostaing
- Department of Nephrology, Dialysis and Organ Transplantation, CHU Rangueil, Toulouse, France
- INSERM U1043, IFR–BMT, CHU Purpan, Toulouse, France
- Université Paul Sabatier, Toulouse, France
| | - Jacques Izopet
- INSERM U1043, IFR–BMT, CHU Purpan, Toulouse, France
- Université Paul Sabatier, Toulouse, France
- Department of Virology, CHU Purpan, Toulouse, France
| | - Nassim Kamar
- Department of Nephrology, Dialysis and Organ Transplantation, CHU Rangueil, Toulouse, France
- INSERM U1043, IFR–BMT, CHU Purpan, Toulouse, France
- Université Paul Sabatier, Toulouse, France
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De Novo Fibrillary Glomerulonephritis (FGN) in a Renal Transplant with Chronic Hepatitis C. Case Rep Transplant 2013; 2013:978481. [PMID: 23844313 PMCID: PMC3697237 DOI: 10.1155/2013/978481] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 06/05/2013] [Indexed: 12/11/2022] Open
Abstract
Chronic hepatitis C viremia (HepC) has been associated with numerous renal manifestations both in native kidneys and in the setting of renal transplantation. Glomerulonephritis (GN) of the renal allograft in the setting of HepC most commonly manifests as type 1 membranoproliferative GN (MPGN), either representing recurrence of the original disease or arising de novo. Other GNs were reported after transplantation in the patient with HepC including membranous nephropathy and thrombotic microangiopathy, as well as an enhanced susceptibility to transplant glomerulopathy. We describe the first case of de novo fibrillary GN in a renal transplant patient with HepC where the primary renal disease was biopsy proven type 1 MPGN. We discuss this relationship in detail.
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Pathology of C4d-negative antibody-mediated rejection in renal allografts. Curr Opin Organ Transplant 2013; 18:319-26. [DOI: 10.1097/mot.0b013e32835d4daf] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Harmful effects of viral replication in seropositive hepatitis C virus renal transplant recipients. Transplantation 2013; 94:1131-7. [PMID: 23104249 DOI: 10.1097/tp.0b013e31826fc98f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Seropositivity for hepatitis C virus (HCV) predicts lower patient and graft survival after renal transplantation (RT). However, the influence of viral replication at transplantation on long-term outcome remains to be determined. METHODS This was a retrospective study conducted in four Spanish hospitals, from 1997 to 2006. Data of all patients with RT, who displayed HCV+ (enzyme-linked immunosorbent assay), and with negative viremia at RT (NEG group) were collected (n=41). For each NEG patient enrolled, data of two patients with RT nearest in time, HCV+, and positive viremia (POS group) were also collected (n=78). RESULTS The POS group showed a higher incidence of long-term liver disease (56.4% vs. 24.4%, P=0.0009) and episodes of transaminase elevation (38.5% vs. 7.3%, P=0.0003) and worse renal function (serum creatinine [sCr], 3.0 [2.7] vs. 1.9 [1.6] mg/dl, P=0.032; glomerular filtration rate, 43.7 [22.4] vs. 56.9 [27.9] ml/min, P=0.075). Noteworthy, 24.4% of NEG patients reactivated after RT, showing a worse patient survival (P=0.039). Active viral replication at RT and dialysis requirement in the first week remained as independent predictors of lower graft survival (death censored): hazards ratio, 3.11 (95% confidence interval, 1.34-7.19; P=0.009) and hazards ratio 3.13 (95% confidence interval, 1.53-6.37; P=0.002). CONCLUSIONS This study shows that active viral replication at transplantation is an independent risk factor for graft failure in patients with positive serology for HCV.
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Husain S, Sis B. Advances in the understanding of transplant glomerulopathy. Am J Kidney Dis 2013; 62:352-63. [PMID: 23313456 DOI: 10.1053/j.ajkd.2012.10.026] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Accepted: 10/03/2012] [Indexed: 02/06/2023]
Abstract
Transplant glomerulopathy is a sign of chronic kidney allograft damage. It has poor survival and no effective therapies. This entity develops as a maladaptive repair/remodeling response to sustained endothelial injury and is characterized by duplication/multilamination of capillary basement membranes. This review provides up-to-date information for transplant glomerulopathy, including new insights into underlying causes and mechanisms, and highlights unmet needs in diagnostics. Transplant glomerulopathy is widely accepted as the principal manifestation of chronic antibody-mediated rejection, mostly with HLA antigen class II antibodies. However, recent data suggest that at least in some patients, there also is an association with hepatitis C virus infection, autoimmunity, and late thrombotic microangiopathy. Furthermore, intragraft molecular studies reveal nonresolving inflammation after sustained endothelial injury as a key mechanism and therapeutic target. Unfortunately, current international criteria rely heavily on light microscopy and miss patients at early stages, when they likely are treatable. Therefore, better tools, such as electron microscopy or molecular probes, are needed to detect patients when kidney injury is in an early active phase. Better understanding of causes and effector mechanisms coupled with early diagnosis can lead to the development of new therapeutics for transplant glomerulopathy and improved kidney outcomes.
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Affiliation(s)
- Sufia Husain
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
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Role of asymmetric dimethylarginine in the progression of carotid atherosclerosis in renal transplant patients. Int Urol Nephrol 2012; 45:1463-9. [DOI: 10.1007/s11255-012-0345-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 11/20/2012] [Indexed: 12/12/2022]
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Fabrizi F, Martin P, Dixit V, Messa P. Hepatitis C virus infection and kidney disease: a meta-analysis. Clin J Am Soc Nephrol 2012; 7:549-57. [PMID: 22403269 DOI: 10.2215/cjn.06920711] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND OBJECTIVES Hepatitis C virus (HCV) infection and kidney disease are both highly prevalent diseases. The association between HCV and GN has been supported by previous research but little is known about the relationship between HCV and kidney disease. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS A systematic review of the published medical literature was conducted to determine if HCV is associated with increased likelihood of kidney disease in the general population. A random-effects model was used to generate a summary estimate of the relative risk for kidney disease, defined as an estimated GFR <60 ml/min per 1.73 m(2) or proteinuria, with HCV across the published studies. RESULTS Nine clinical studies (817,917 unique individuals) were identified. Pooling of study results demonstrated the absence of a relationship between HCV seropositive status and reduced estimated GFR (adjusted relative risk, 1.12; 95% confidence interval, 0.91, 1.38; P=0.28) according to the random-effects model. HCV seropositive serology was an independent and significant risk factor for proteinuria (defined by urine dipstick test or spot urine albumin/creatinine ratio) in the general population, with a summary estimate for adjusted relative risk of 1.47 (95% confidence interval, 1.12, 1.94; P=0.006). Significant heterogeneity was observed between studies (Ri=0.82; P value by Q test, <0.001). CONCLUSIONS This meta-analysis shows that HCV is independently associated with proteinuria but not with reduced GFR in the general population. Substantial heterogeneity occurred.
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Affiliation(s)
- Fabrizio Fabrizi
- Division of Nephrology and Dialysis, Maggiore Policlinico Hospital, IRCCS Foundation, Milan, Italy.
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Al-Freah MAB, Zeino Z, Heneghan MA. Management of hepatitis C in patients with chronic kidney disease. Curr Gastroenterol Rep 2012; 14:78-86. [PMID: 22161023 DOI: 10.1007/s11894-011-0238-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Chronic kidney disease represents a global health problem. Chronic hepatitis C virus (HCV) infection is prevalent in patients with end stage renal disease (ESRD) on hemodialysis (HD) and in renal transplant recipients with significant impact on morbidity and mortality. Furthermore, HCV can cause various forms of glomerulopathy with the predominant type being cryglobulinemia associated membranoproliferative glomerulonephritis. Liver enzymes are traditionally used as markers of liver injury; however, there is wide variation in aminotransferase levels in patients with ESRD. Therefore, diagnosis of chronic hepatitis C (CHC) in patients with ESRD is based on HCV antibody testing and further confirmation with polymerase chain reaction testing. Current standard therapy for CHC is composed of pegylated interferon and ribavirin. However, this combination is challenging in patients with ESRD due to its tolerability. We describe in this review relevant issues in epidemiology, diagnosis and management of CHC in ESRD, HD and renal transplant recipients.
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Affiliation(s)
- Mohammad A B Al-Freah
- Institute of Liver Studies, King's College Hospital NHS Foundation Trust, Denmark Hill, London, SE5 9RS, United Kingdom
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Abstract
Thrombotic microangiopathies encompass a group of disorders characterized by microangiopathic hemolytic anemia, thrombocytopenia associated with hyaline thrombi (comprised primarily of platelet aggregates in the microcirculation), and varying degrees of end-organ failure. Many primary (genetic) and secondary etiological predisposing factors have been described-namely pregnancy, autoimmune disorders, cancer, drugs and antineoplastic therapy, bone marrow transplantation/solid organ transplantation, and infections. In the setting of infectious diseases, the association with Shiga or Shiga-like exotoxin of Escherichia coli 0157:h7 or Shigella dysenteriae type 1-induced typical hemolytic uremic syndrome is well known. Recently however, an increasing body of evidence suggests that viruses may also play an important role as trigger factors in the pathogenesis of thrombotic microangiopathies. This is a comprehensive review focusing on the current understanding of viral associated/induced endothelial stimulation and damage that ultimately leads to the development of this life-threatening multisystemic disorder.
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Affiliation(s)
- Rodrigo Lopes da Silva
- Hospital Santo António dos Capuchos, Centro Hospitalar Lisboa Center, Alameda Capuchos, Lisboa, Portugal.
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Johnson S, Waters A. Is complement a culprit in infection-induced forms of haemolytic uraemic syndrome? Immunobiology 2011; 217:235-43. [PMID: 21852019 DOI: 10.1016/j.imbio.2011.07.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Revised: 06/30/2011] [Accepted: 07/18/2011] [Indexed: 12/25/2022]
Abstract
Haemolytic uraemic syndrome (HUS) accounts for the most common cause of childhood acute renal failure. Characterized by the classical triad of a microangiopathic haemolytic anaemia, thrombocytopaenia and acute renal failure, HUS occurs as a result of Shiga-toxin producing microbes in 90% of cases. The remaining 10% of cases represent a heterogeneous subgroup in which inherited and acquired forms of complement dysregulation have been described in up to 60%. Emerging evidence suggests that microbes associated with HUS exhibit interaction with the complement system. With the advent of improved genetic diagnosis, it is likely that certain cases of infection-induced HUS may be attributed to underlying defects in complement components. This review summarises the interplay between complement and infection in the pathogenesis of HUS.
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Affiliation(s)
- Sally Johnson
- Department of Paediatric Nephrology, Great North Children's Hospital, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Queen Victoria Road, Newcastle Upon Tyne, UK.
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