Complicações renais decorrentes da infecção por SARS-CoV-2 em pessoas com COVID-19 hospitalizadas: scoping review

Objetivos: Identificar complicações/sequelas renais decorrentes da infecção por SARS-CoV-2 em pessoas com COVID-19; e descrever a característica de idade da população estudada. Metodologia: Scoping Review realizada nas bases de dados Web of Science, BVS, Cochrane Library, MEDLINE/PubMed, CINAHL, SCOPUS, Embase, LILACS. E nos sites online: ProQuest Dissertations and Theses, Grey Literature e Google Scholar. Os descritores utilizados foram (comorbidity OR sequel OR complications), (kidney diseases OR glomerular disease OR acute kidney injury OR nephropathy) AND (coronavirus OR SARS-CoV-2 OR COVID-19). Critérios de inclusão: artigos em português, inglês e espanhol, com abordagens metodológicas diversas, disponíveis na íntegra, online, publicados no período de 01 de janeiro de 2020 a 29 de setembro de 2021. E de exclusão: pessoas com diagnósticos prévios de patologias renais agudas e/ou crônicas; cartas ao editor; artigos de opinião; editoriais; e notas. Resultados: Selecionaram-se 10 artigos, que evidenciaram que o processo infeccioso causado pelo SARS-CoV-2 pode iniciar com uma leve proteinúria e hematúria, e evoluir para uma injúria renal aguda causada pela diminuição da capacidade de filtração glomerular, que favorece a retenção de algumas escórias nitrogenadas, causando o aumento dos níveis de creatinina e de ureia. Ademais, informaram que indivíduos entre 52-69 anos foram os mais acometidos. Considerações finais: As complicações/sequelas renais decorrentes da infecção por SARS-CoV-2 são: deposição de imunocomplexos nas células renais, proteinúria, hematúria, aumento da creatinina sérica, aumento da ureia nitrogenada no sangue, diminuição da TFG, e IRA estágio 1, 2 e 3. Tais complicações ocorreram principalmente em pessoas com idade ≥ 52 anos.

Biopsy Proven Kidney Disease From A Rural Tertiary Care Centre — A Social And Epidemiological Perspective

The prevalence of chronic kidney disease (CKD) is rising in rural areas. Screening of high risk cases, early detection and referral by the physicians reduces the prevalence of kidney disease in the population. Hereditary disorders, Glomerular diseases, Obstructive nephropathies are common causes in CKD in rural areas. Kidney biopsy is an essential diagnostic tool in to diagnose glomerular diseases. This prospective study done at tertiary care teaching hospital between 2017 and 2020 to understand the profile of glomerular diseases in rural area. Forty patients were included in the Study. Primary glomerular disease (PGD) was present in 26 patients and Secondary glomerular disease (SGD) in 10 and primary tubulointerstitial pathology in 4 patients. The most common Secondary glomerular disease was lupus. Glomerular diseases are amenable to immunomodulatory therapy leading to change in clinical outcome of the disease. However, Kidney biopsy is underutilized particularly in elderly patients, hypertensive nephropathy patients, suspected non diabetic kidney disease and lupus patients. Financial and social issues play dominant role in the treatment plan of chronic diseases in rural areas. Regional registry of kidney biopsy of urban and rural areas separately helps in paving a way of understanding the profile of glomerular diseases and its prevention.

Association of ultrasonographic features with histologic findings in 71 dogs with protein-losing nephropathy (2008–2018)

OBJECTIVE To determine whether ultrasonographic features in dogs with protein-losing nephropathy (PLN) were associated with renal biopsy findings and compare corticomedullary ratios between dogs with PLN versus non-renal disease. ANIMALS 71 dogs with PLN and 33 dogs without renal disease. PROCEDURES Medical records and archived ultrasonographic images for dogs with PLN that underwent renal biopsy between 2008 and 2018 were reviewed. Corticomedullary ratios were measured. RESULTS In dogs with PLN, median serum creatinine and BUN concentrations and urine-protein-to-creatinine-ratio prior to renal biopsy were 3.4 mg/dL (interquartile range [IQR], 1.2 to 5.3 mg/dL), 80 mg/dL (IQR, 28 to 105 mg/dL), and 11.4 (IQR, 6.4 to 18.3), respectively. Histologic abnormalities within the tubulointerstitial space were associated with cortical echogenicity. Gastric wall thickness > 5 mm was associated with a histologic diagnosis of acute glomerular disease. Dogs with immune complex–mediated glomerular disease were more likely to have abnormal gastric mural architecture. Other ultrasonographic features of the kidneys, liver, and stomach and the presence of ascites did not help to differentiate immune complex–mediated from non-immune complex–mediated glomerular disease, acute from chronic disease, or amyloid from non-amyloid disease or distinguish whether tubulointerstitial disease was present or absent. Median left corticomedullary ratio for 66 dogs with PLN (1.2) was significantly higher than that for the 33 dogs without renal disease (1.0). Clinical Relevance Ultrasonographic features were poorly associated with specific pathological disorders in dogs with PLN. In this study, the corticomedullary ratio was higher in dogs with PLN, indicating the presence of cortical thickening, but the clinical relevance is unknown.

A Core Outcome Set for Trials in Glomerular Disease

Background and objectivesOutcomes reported in trials in adults with glomerular disease are often selected with minimal patient input, are heterogeneous, and may not be relevant for clinical decision making. The Standardized Outcomes in Nephrology–Glomerular Disease (SONG-GD) initiative aimed to establish a core outcome set to help ensure that outcomes of critical importance to patients, care partners, and clinicians are consistently reported.Design, setting, participants, and measurementsWe convened two 1.5-hour workshops in Melbourne, Australia, and Washington, DC, United States. Attendees were identified purposively with 50 patients/care partners and 88 health professionals from 19 countries; 51% were female. Patients and care partners were from the United States, Australia, and Canada, and had experience of a glomerular disease with systemic features (n=9), kidney-limited nephrotic disease (n=9), or other kidney-limited glomerular disease (n=8). Attendees reviewed the results of the SONG-GD Delphi survey and aims of the workshop and then discussed potential core outcomes and their implementation in trials among moderated breakout groups of eight to 12 people from diverse backgrounds. Transcripts of discussions were analyzed thematically.ResultsThree themes were identified that supported the proposed core outcomes: limiting disease progression, stability and control, and ensuring universal relevance (i.e., applicable across diverse populations and settings). The fourth theme, preparedness for implementation, included engaging with funders and regulators, establishing reliable and validated measures, and leveraging existing endorsements for patient-reported outcomes.ConclusionsWorkshop themes demonstrated support for kidney function, disease activity, death, life participation, and cardiovascular disease, and these were established as the core outcomes for trials in adults with glomerular disease. Future work is needed to establish the core measures for each domain, with funders and regulators central to the uptake of the core outcome set in trials.

Glomerular Disease Education Experience across Nephrology Fellowship Programs: An International Survey

Introduction: Glomerular disease (GN) education is an important, albeit a challenging component of nephrology fellowship training. We hypothesized that trainee experience varies widely across programs, leading to differences in self-reported comfort levels in the diagnosis and management of glomerular diseases. Methods: The Glomerular Disease Study & Trial Consortium (GlomCon) conducted an anonymous online survey to determine the educational experience of nephrology trainees. We used multiple-choice questions to obtain data about a) curriculum-based education, b) dedicated specialty clinic, and c) exposure to pathology. We leveraged a visual analogue scale of 1-100 (with a higher number indicating a higher comfort level) to assess self-reported levels of clinical comfort. The survey was disseminated via email to the subscribing members of GlomCon, and through Twitter. Results: In total, there were 109 respondents to our survey, and 56% were from training programs in the United States. Exposure to a specialized GN clinic was reported by 45%, while 77% reported the presence of an onsite nephropathologist at their training program. Self-reported comfort scores were 59±25 and 52±25 for diagnosis and treatment of glomerular diseases respectively. Days spent in GN clinic per year, years of fellowship and dedicated nephropathology didactics were associated with higher diagnosis and treatment comfort scores. Conclusion: Trainees report a wide variation in glomerular disease education across fellowship programs. A lack of nephropathology exposure and a dedicated GN curriculum were associated with lower scores in self-reported clinical comfort in caring for patients with glomerular disease.

The Spectrum of Children's Kidney Diseases—2403 Renal Biopsy-Proven Cases from a Single Centre in China Between 1999 and 2019

Background: This study aimed to investigate the clinical and pathological characteristics and the changes in glomerular diseases in 2403 pediatric renal biopsies from 1999 to 2019.Methods: Renal biopsies performed on children aged ≤18 years between 1999 and 2019 were analysed at our center. We analysed the clinical and histological characteristics, distribution of pediatric glomerular diseases with various clinical presentations, and changes in the glomerular disease patterns during the study period.Results: The most common primary glomerular disease was IgA nephropathy (IgAN) (24.3%), followed by minimal change disease (MCD) (15.3%) and membranous glomerulonephritis (MN) (13.1%). Henoch-Schonlein purpura nephritis (HSPN) (18.1%) and lupus nephritis (LN) (7.2%) were the most frequently recorded secondary glomerular diseases. Alport syndrome and thin basement membrane nephropathy (TBMN) were the most common inherited glomerular diseases, accounting for 1.2% and 0.6% of the total glomerular diseases in children, respectively. The number of boys with IgAN, MCD and IgM nephropathy (IgMN) was higher than that of girls, while the number of girls with MN and LN was higher than that of boys. The frequencies of MCD, MN, IgMN and endocapillary proliferative glomerulonephritis (EnPGN) in the 13-18-year-old group were higher than those in the 0-12-year-old group, while the frequencies of IgAN, mesangial proliferative glomerulonephritis (MsPGN) and focal proliferative glomerulonephritis (FPGN) were lower than those in the 0-12-year-old group. The ratio of Alport syndrome and TBMN in the 0-12-year-old group was higher than that in the 13-18-year-old group. The proportion of patients with MCD and MN in 2010-2019 was higher than that in 1999-2009, while the ratio of IgAN, MsPGN, IgMN, EnPGN, membranoproliferative glomerulonephritis (MPGN), HSPN and HBV-associated glomerulonephritis (HBV-GN) decreased. MCD (28.5%) was the most common cause of nephrotic syndrome (NS). In children with haematuria and proteinuria, HSPN (38.8%) and IgAN (36.9%) were more common than other glomerular diseases. IgAN (39.4%) was the most common cause of AKI. Sclerosing glomerulonephritis (SGN) (21.1%) was the main cause of progressive chronic kidney disease (CKD).Conclusions: Glomerular diseases in children were related to sex and age. From 1999 to 2019, the spectrum of children's kidney disease in our center changed significantly.

IL-1 receptor signaling in podocytes limits susceptibility to glomerular damage

IL-1 receptor (IL-1R1) activation triggers a proinflammatory signaling cascade that can exacerbate kidney injury. However, the functions of the podocyte IL-1R1 in glomerular disease remain unclear. To study the role of IL-1R1 signaling in podocytes, we selectively ablated the podocyte IL-1R1 in mice (PKO). We then subjected PKO mice and wild-type (WT) controls to 2 glomerular injury models: nephrotoxic serum (NTS)- and adriamycin (ADR)-induced nephropathy. Surprisingly, we found IL-1R1 activation in podocytes limited albuminuria and podocyte injury during NTS- and ADR-induced nephropathy. Moreover, deletion of IL-1R1 in podocytes drove podocyte apoptosis and glomerular injury through diminishing Akt activation. Activation of Akt signaling abrogated the differences in albuminuria and podocyte injury between WT and PKO mice during NTS. Thus, IL-1R1 signaling in podocytes limits susceptibility to glomerular injury via an Akt-dependent signaling pathway. These data identify an unexpected protective role for IL-1R1 signaling in podocytes in the pathogenesis of glomerular disease.