Publications by authors named "Arash Rashidi"

Article Synopsis
  • High-dose methotrexate (MTX) can lead to serious complications like acute kidney injury (AKI), neutropenia, and liver damage, but glucarpidase, an enzyme that breaks down MTX, shows potential benefits.
  • In a study of 708 patients with MTX-AKI across 28 cancer centers, those receiving glucarpidase had a significantly higher chance of kidney recovery and faster recovery times compared to those who did not receive the treatment.
  • Additionally, glucarpidase treatment was associated with lower rates of severe neutropenia and liver enzyme elevation, but there was no notable difference in mortality rates between the two groups.
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Immune checkpoint inhibitors (ICIs) have revolutionized the treatment of cancer and are now the backbone of therapy for several malignancies. However, ICIs can cause a spectrum of kidney immune-related adverse events including acute kidney injury (AKI), most commonly manifesting as acute interstitial nephritis (AIN), although glomerular disease and electrolyte disturbances have also been reported. In this position statement by the American Society of Onco-nephrology (ASON), we summarize the incidence and risk factors for ICI-AKI, pathophysiological mechanisms, and clinicopathologic features of ICI-AKI.

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Sodium/glucose cotransporter 2 (SGLT2) inhibitors have demonstrated a class effect in improving serum magnesium levels in patients with diabetes. Additionally, recent reports have shown their promising beneficial effects in the treatment of refractory hypomagnesemia in patients with diabetes. However, their role in treating hypomagnesemia in patients without diabetes remains unexplored.

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Immune checkpoint inhibitors (ICIs) are now established treatments for advanced cancer and their use is now ubiquitous. The high upside of ICIs is tempered by their toxicity profile affecting almost every organ, including the kidneys. Although acute interstitial nephritis is the major kidney-related adverse effect of checkpoint inhibitors, other manifestations such as electrolyte abnormalities and renal tubular acidosis have been described.

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Background: Corticosteroids are the mainstay of treatment for immune checkpoint inhibitor-associated acute kidney injury (ICPi-AKI), but the optimal duration of therapy has not been established. Prolonged use of corticosteroids can cause numerous adverse effects and may decrease progression-free survival among patients treated with ICPis. We sought to determine whether a shorter duration of corticosteroids was equally efficacious and safe as compared with a longer duration.

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Anemia is a common medical problem among patients with cancer and chronic kidney disease (CKD). Although anemia in patients with CKD is often treated with iron and erythropoietin-stimulating agents, there are controversies with regard to the use of erythropoietin-stimulating agents in cancer patients. In this article, we review the treatment of anemia in patients with cancer and CKD, in addition to summarizing the current guidelines in treatment of anemia in these patients.

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AKI in the setting of immune checkpoint inhibitors.Need for kidney biopsy for diagnosis of immune checkpoint inhibitors.Importance of pathology in diagnosis of immune checkpoint inhibitor-induced AKI.

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Background: The flare of immune-mediated disease following coronavirus disease of 2019 (COVID-19) vaccination is a rare adverse event following immunization. De novo, as well as relapsing IgA nephropathy (IgAN) cases, have been reported following either mRNA-1273 (Moderna) or BNT162b2 (Pfizer-BioNTech) vaccination. To our knowledge, the majority of IgAN relapses did not result in severe acute kidney injury (AKI) and resolved spontaneously.

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Article Synopsis
  • ICPi-AKI (immune checkpoint inhibitor-associated acute kidney injury) is a significant concern for cancer patients, occurring about 16 weeks after starting treatment and often linked to lower kidney function and certain medications.
  • A study involving 429 patients found that about 64% experienced recovery of kidney function after receiving corticosteroids, especially when treatment started early.
  • Rechallenging patients with ICPis after kidney injury showed a 16.5% recurrence rate of kidney issues, but there was no significant difference in survival compared to those who were not rechallenged.
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Background: Hypercoagulability may be a key mechanism of death in patients with coronavirus disease 2019 (COVID-19).

Objective: To evaluate the incidence of venous thromboembolism (VTE) and major bleeding in critically ill patients with COVID-19 and examine the observational effect of early therapeutic anticoagulation on survival.

Design: In a multicenter cohort study of 3239 critically ill adults with COVID-19, the incidence of VTE and major bleeding within 14 days after intensive care unit (ICU) admission was evaluated.

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Article Synopsis
  • - The study investigated the incidence of venous thromboembolism (VTE) in COVID-19 patients after they were discharged from the hospital, tracking 1,529 patients for at least 45 days through follow-up calls.
  • - Out of those, 228 patients reported potential VTE symptoms, but only one was diagnosed with symptomatic pulmonary embolism (PE), leading to a low rate of symptomatic VTE of 0.2% within the study period.
  • - The findings suggest that routine use of extended thromboprophylaxis after hospitalization for COVID-19 may not be beneficial, indicating that further randomized trials are needed to clarify this issue.
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Background: AKI is a common sequela of coronavirus disease 2019 (COVID-19). However, few studies have focused on AKI treated with RRT (AKI-RRT).

Methods: We conducted a multicenter cohort study of 3099 critically ill adults with COVID-19 admitted to intensive care units (ICUs) at 67 hospitals across the United States.

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Rationale & Objective: Underlying kidney disease is an emerging risk factor for more severe coronavirus disease 2019 (COVID-19) illness. We examined the clinical courses of critically ill COVID-19 patients with and without pre-existing chronic kidney disease (CKD) and investigated the association between the degree of underlying kidney disease and in-hospital outcomes.

Study Design: Retrospective cohort study.

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Aim: High-dose melphalan followed by autologous haematopoietic cell transplantation remains the standard-of-care therapy for multiple myeloma (MM). Gastrointestinal toxicity concomitant with electrolyte derangement is a primary cause of morbidity from transplant. Here, we assessed the dynamics of electrolyte imbalances and its role in hematologic counts and engraftment.

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Hyperimmunoglobulin E syndrome (HIES) is a rare immunodeficiency syndrome with characteristic features of pulmonary infections, eczema, recurrent skin abscesses and elevated serum IgE. We present a case of an HIES patient referred for nephrology consultation with elevated serum creatinine and nephrotic-range proteinuria. The subsequent kidney biopsy revealed AA-type amyloidosis and a separate and distinct inactive immune complex-mediated glomerulopathy with frequent glomerular capillary wall and mesangial polyclonal deposits.

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Personal and organizational performance is determined by commitment and both technical and general competencies, including leadership skills. Academia, however, mainly targets technical aspects in its curricular programs. On the other hand, the inter-disciplinary and multi-sector nature of Nutrition necessitates high levels of collaboration between stakeholders.

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In this work, we introduce an efficient computational scheme, based on the macro basis function method, to analyze the scattering of a plane wave by V-shaped plasmonic optical nanoantennas. The polarization currents and scattered fields for the both symmetric and antisymmetric excitations are investigated. We investigate how the resonant frequency of the plasmonic V-shaped nanoantenna is tailored by engineering the geometrical parameters and by changing the polarization state of the incident plane wave.

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There is no study that assessed the effect of co-supplementation of iron and vitamin C on biomarkers of oxidative stress in non-anemic iron-deficient females. We investigated the effects of iron vs. iron + vitamin C co-supplementation on biomarkers of oxidative stress in iron-deficient girls.

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Immunoglobulin A nephropathy (IgAN) has been identified in patients with various malignancies. Although membranous glomerulonephritis and minimal change disease have been described in patients with mesothelioma, to our knowledge IgAN associated with mesothelioma has not been reported. We present a case of IgAN, characterized by progressive deterioration of renal function from normal and confirmed by kidney biopsy.

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