291 results match your criteria: "Harold Simmons Center for Kidney Disease Research and Epidemiology[Affiliation]"

Diabetes and the Gut Microbiome.

Semin Nephrol

March 2021

Division of Nephrology, University of California, Irvine School of Medicine, Orange, CA.

Gut dysbiosis in diabetes mellitus is associated with decreased short-chain fatty acids and epithelial barrier disruption. Microbial-derived toxins move across the "leaky gut" and incur systemic inflammation and insulin resistance. In children, gut dysbiosis has been associated with risk of developing type 1 diabetes mellitus.

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Polypharmacy and Frailty among Hemodialysis Patients.

Nephron

March 2022

Division of Nephrology and Hypertension, Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California Irvine, School of Medicine, Orange, California, USA.

Background: Both polypharmacy and frailty are highly prevalent among the patients on hemodialysis and associated with adverse outcomes; however, little is known about the association between them.

Methods: We examined 337 patients enrolled in the ACTIVE/ADIPOSE dialysis cohort study between 2009 and 2011. The number of prescribed medications and frailty were assessed at baseline, 12, and 24 months.

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Association of Pre-ESRD Serum Bicarbonate with Post-ESRD Mortality in Patients with Incident ESRD.

Am J Nephrol

January 2022

Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, Department of Medicine, School of Medicine, University of California Irvine, Orange, California, USA.

Background: Serum bicarbonate or total carbon dioxide (CO2) concentrations decline as chronic kidney disease (CKD) progresses and rise after dialysis initiation. While metabolic acidosis accelerates the progression of CKD and is associated with higher mortality among patients with end stage renal disease (ESRD), there are scarce data on the association of CO2 concentrations before ESRD transition with post-ESRD mortality.

Methods: A historical cohort from the Transition of Care in CKD (TC-CKD) study includes 85,505 veterans who transitioned to ESRD from October 1, 2007, through March 31, 2014.

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Background: Longer hospice length of stay improves the palliation of symptoms, quality of life, and the dying process for patients and their caregivers. We used a Lean designed Rapid Improvement Event (RIE) to facilitate earlier entry into hospice.

Measures: Our primary outcome was hospice length of stay.

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Cardiovascular and Bleeding Outcomes with Anticoagulants across Kidney Disease Stages: Analysis of a National US Cohort.

Am J Nephrol

January 2022

Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology and Hypertension, University of California Irvine, School of Medicine, Orange, California, USA.

Background: While direct oral anticoagulants (DOACs) are considered safe among patients without chronic kidney disease (CKD), the evidence is conflicting as to whether they are also safe in the CKD and end-stage kidney disease (ESKD) population. In this observational cohort study, we examined whether DOACs are a safe alternative to warfarin across CKD stages for a variety of anticoagulation indications.

Methods: Individuals on DOACs or warfarin were identified from OptumLabs® Data Warehouse (OLDW), a longitudinal dataset with de-identified administrative claims, from 2010 to 2017.

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Background: The diverse risk factors for kidney impairments suggest that kidney function decline is more likely to occur in individuals with a broadly constituted health deficit. Here we conducted a longitudinal cohort study to evaluate the association of baseline frailty status with the risk of estimated glomerular filtration rate (eGFR) decline.

Methods: Overall, 1269 participants aged 70-84 years from Rugao Longevity and Ageing cohort with 3-year follow-up were included.

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Association of lactate dehydrogenase with mortality in incident hemodialysis patients.

Nephrol Dial Transplant

March 2021

Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology and Hypertension, University of California Irvine Medical Center, Orange, CA, USA.

Background: Lactate dehydrogenase (LDH) plays a role in the glucose metabolism of the human body. Higher LDH levels have been linked to mortality in various cancer types; however, the relationship between LDH and survival in incident hemodialysis (HD) patients has not yet been examined. We hypothesized that higher LDH level is associated with higher death risk in these patients.

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Renal-Cerebral Pathophysiology: The Interplay Between Chronic Kidney Disease and Cerebrovascular Disease.

J Stroke Cerebrovasc Dis

September 2021

Division of Nephrology, Hypertension and Kidney Transplantation, Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology and Hypertension, University of California, Irvine, School of Medicine, 101 The City Drive South, City Tower, Suite 400, Orange, CA 92868, USA. Electronic address:

Objectives: Cerebrovascular disease has increasingly been linked to overall vascular health. Pathologic conditions like diabetes, hypertension, and kidney disease have been shown to affect brain health and cerebrovascular and nervous systems. Acute kidney injury (AKI) and chronic Kidney Disease (CKD) represent a variety of vascular insults that can adversely affect cerebral health.

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Editorial: Novel therapeutic approaches in chronic kidney disease, uremia and kidney transplantation: past, present and future.

Curr Opin Nephrol Hypertens

January 2021

Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, Department of Medicine, University of California Irvine School of Medicine, Orange, California.

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Purpose Of Review: Severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) is the novel virus responsible for the current worldwide pandemic. The scientific and healthcare communities have made every effort to discover and implement treatment options at a historic pace. Patients with kidney disease are uniquely vulnerable to an infectious pandemic because of their need to be in frequent contact with the healthcare system for life-sustaining renal replacement therapy whether it be by dialysis or transplant.

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Purpose Of Review: Immunological factors are a major cause of kidney allograft loss. Calcineurin inhibitors (CNIs) have improved short-term kidney allograft survival; however, they in turn contribute to long-term kidney allograft loss from chronic CNI nephrotoxicity. Tolerance induction in transplantation can avoid the long-term adverse effects of immunosuppressive medications.

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Purpose Of Review: The novel corona virus (SARS-CoV2) has been demonstrated to cause acute kidney injury due to direct cellular toxicity as well as due to a variety of autoimmune glomerular diseases. The concept of a surge of infected patients resulting in an overwhelming number of critical patients has been a central concern in healthcare planning during the COVID-19 era.

Recent Findings: One crucial question remains as to how to manage patients with end stage renal disease and acute kidney injury in case of a massive surge of critically ill infected patients.

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Purpose Of Review: Although a widely recognized and complex pathophysiological condition, sarcopenic obesity remains less appreciated and may elude diagnosis and workup in both kidney transplant waitlisted candidates and kidney transplant recipients. The lack of consensus definition, and practical diagnostic tools for evaluating waitlisted candidates and transplant recipients are barriers to early detect and initiate therapeutic management for sarcopenic obesity. Although sarcopenia leads to poor clinical outcomes, posttransplant obesity yields conflicting results.

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Polypharmacy, hospitalization, and mortality risk: a nationwide cohort study.

Sci Rep

November 2020

Department of Internal Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-Gu, Seoul, 03722, Republic of Korea.

Polypharmacy is a growing and major public health issue, particularly in the geriatric population. This study aimed to examine the association between polypharmacy and the risk of hospitalization and mortality. We included 3,007,620 elderly individuals aged ≥ 65 years who had at least one routinely-prescribed medication but had no prior hospitalization within a year.

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Metformin in chronic kidney disease: a strong dose of caution.

Kidney Int

November 2020

Department of Medicine, Division of Nephrology, University of California Irvine Medical Center, Irvine, California, USA; Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, Department of Medicine, University of California Irvine School of Medicine, Orange, California, USA; Nephrology Section, Department of Medicine, Veterans Affairs Long Beach Healthcare System, Long Beach, California, USA; Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California, USA. Electronic address:

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Burden of Anemia in Chronic Kidney Disease: Beyond Erythropoietin.

Adv Ther

January 2021

Division of Nephrology and Hypertension, University of California, Irvine School of Medicine, Orange, CA, USA.

Anemia is a frequent comorbidity of chronic kidney disease (CKD) and is associated with a considerable burden because of decreased patient health-related quality of life and increased healthcare resource utilization. Based on observational data, anemia is associated with an increased risk of CKD progression, cardiovascular events, and all-cause mortality. The current standard of care includes oral or intravenous iron supplementation, erythropoiesis-stimulating agents, and red blood cell transfusion.

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A faster decline of residual kidney function and erythropoietin stimulating agent hyporesponsiveness in incident hemodialysis patients.

Hemodial Int

January 2021

Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology and Hypertension, University of California Irvine, School of Medicine, Orange, California, USA.

Introduction: Erythropoietin stimulating agents (ESA) hyporesposiveness has been associated with increased mortality in hemodialysis (HD) patients. However, the impact of decline of residual kidney function (RKF) on ESA hyporesposiveness has not been adequately elucidated among patients receiving HD.

Methods: The associations of RKF decline with erythropoietin resistance index (ERI; average weekly ESA dose [units])/post-dialysis body weight [kg]/hemoglobin [g/dL]) were retrospectively examined across four strata of annual change in RKF (residual renal urea clearance [KRU] < -3.

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Estimating Residual Kidney Function With and Without Urine Clearance Measures: A Useful Tool for Incremental Dosing of Dialysis.

Kidney Med

November 2019

Division of Nephrology and Hypertension and Kidney Transplantation, and Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California Irvine School of Medicine, Orange, CA.

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Incremental and Twice-Weekly Hemodialysis Program in Practice.

Clin J Am Soc Nephrol

December 2020

Division of Nephrology and Hypertension, Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California Irvine, Orange, California.

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Background: Clostridioides (formerly Clostridium) difficile infection (CDI) is one of the leading causes of morbidity and mortality worldwide. Solid organ transplant (SOT) recipients are at an increased risk for CDI. A recent study showed an overall improvement in mortality amongst hospitalized individuals with CDI, but it is unclear if this benefit extends to SOT recipients.

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Association of age with risk of first and subsequent allograft failure and mortality among young kidney transplant recipients in the USA - a retrospective cohort study.

Transpl Int

November 2020

Division of Nephrology and Hypertension, School of Medicine, Harold Simmons Center for Kidney Disease Research and Epidemiology, University of California Irvine, Orange, CA, USA.

Adolescent age may be a high-risk period for kidney allograft failure. However, the knowledge on this topic is limited mostly to the first transplant. Among 20 960 patients aged ≤21 years at the first kidney transplantation from the US Renal Data System, we evaluated the association of age at the first kidney transplant with risk for the first and subsequent graft failures (1st, 2nd, and 3rd) using the conditional risk set model for recurrent time-to-event data.

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Mortality Risk in Chronic Kidney Disease Patients Transitioning to Dialysis: Impact of Opiate and Non-Opiate Use.

Am J Nephrol

July 2021

Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, University of California Irvine, Orange, California, USA,

Background: Population-based studies show there is a high prevalence of chronic kidney disease (CKD) patients suffering from chronic pain. While opiates are frequently prescribed in non-dialysis-dependent CKD (NDD-CKD) patients, there may be toxic accumulation of metabolites, particularly among those progressing to end-stage renal disease (ESRD). We examined the association of opiate versus other analgesic use during the pre-ESRD period with post-ESRD mortality among NDD-CKD patients transitioning to dialysis.

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The Academy of Nutrition and Dietetics and the National Kidney Foundation collaborated to provide an update to the Clinical Practice Guidelines (CPG) for nutrition in chronic kidney disease (CKD). These guidelines provide a valuable update to many aspects of the nutrition care process. They include changes in the recommendations for nutrition screening and assessment, macronutrients, and targets for electrolytes and minerals.

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