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Chirag parikh

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https://www.readbyqxmd.com/read/29767638/pre-exposure-prophylaxis-with-tenofovir-disoproxil-fumarate-emtricitabine-and-kidney-tubular-dysfunction-in-hiv-uninfected-individuals
#1
Vasantha Jotwani, Rebecca Scherzer, David V Glidden, Megha Mehrotra, Patricia Defechereux, Albert Liu, Monica Gandhi, Michael Bennett, Steven G Coca, Chirag R Parikh, Robert M Grant, Michael G Shlipak
BACKGROUND: Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) is becoming increasingly adopted for HIV prevention. Tenofovir can cause proximal tubular damage and chronic kidney disease in HIV-infected persons, but little is known regarding its nephrotoxic potential among HIV-uninfected persons. In this study, we evaluated the effects of PrEP on urine levels of the following: α1-microglobulin (α1m), a marker of impaired tubular reabsorption; albuminuria, a measure of glomerular injury; and total proteinuria...
June 1, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29725645/a-survey-of-patient-attitudes-toward-participation-in-biopsy-based-kidney-research
#2
Dennis G Moledina, Bettina Cheung, Lidiya Kukova, Randy L Luciano, Aldo J Peixoto, F Perry Wilson, Sandra Alfano, Chirag R Parikh
Introduction: As part of the precision medicine initiative, the National Institutes of Health/National Institute of Diabetes and Digestive Kidney Diseases has proposed collecting human kidney tissue to discover novel therapeutic targets from patients with kidney diseases. Patient attitudes on participating in kidney biopsy-based research are largely unknown. Methods: We evaluated attitudes toward donating kidney tissue to research among participants who had experienced a clinically indicated kidney biopsy, through a survey conducted 9 months (interquartile range, 5-13 months) after their biopsy...
March 2018: KI Reports
https://www.readbyqxmd.com/read/29685497/plasma-biomarkers-are-associated-with-renal-outcomes-in-individuals-with-apol1-risk-variants
#3
Girish N Nadkarni, Kinsuk Chauhan, Divya A Verghese, Chirag R Parikh, Ron Do, Carol R Horowitz, Erwin P Bottinger, Steven G Coca
G1/G2 variants in the Apolipoprotein L1 (APOL1) gene are associated with end-stage renal disease (ESRD) in people with African ancestry. Plasma biomarkers may have utility for risk stratification in APOL1 high-risk individuals of African ancestry. To evaluate this, we measured tumor necrosis factor receptor 1/2 (TNFR1/2) and kidney injury molecule-1 (KIM1) in baseline plasma specimens from individuals of African ancestry with high-risk APOL1 genotype. Biomarker association with a composite renal outcome of ESRD or 40% sustained decline in estimated glomerular filtration rate (eGFR) was then determined and then assessed as improvement in area under curve...
April 20, 2018: Kidney International
https://www.readbyqxmd.com/read/29673338/the-prognostic-importance-of-duration-of-aki-a-systematic-review-and-meta-analysis
#4
Swati Mehta, Kinsuk Chauhan, Achint Patel, Shanti Patel, Rachel Pinotti, Girish N Nadkarni, Chirag R Parikh, Steven G Coca
BACKGROUND: Acute kidney injury (AKI), as defined by peak increase in serum creatinine, is independently associated with increased risk of mortality and length of stay. Studies have suggested that the duration of AKI may be an important additional or independent prognostic marker of increased mortality in patients with AKI across clinical settings. We performed a systematic review and meta-analysis of published studies to assess the impact of duration of AKI on outcomes. METHODS: Various bibliographic databases (MEDLINE, Embase, Cochrane Library, CINAHL and Web of Science) were searched through database inception to December 2015...
April 19, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29602632/urinary-biomarkers-of-kidney-tubular-damage-and-risk-of-cardiovascular-disease-and-mortality-in-elders
#5
Vasantha Jotwani, Ronit Katz, Joachim H Ix, Orlando M Gutiérrez, Michael Bennett, Chirag R Parikh, Steven R Cummings, Mark J Sarnak, Michael G Shlipak
RATIONALE & OBJECTIVE: Novel urinary biomarkers have enabled earlier detection of kidney tubular damage, but their prognostic value for adverse cardiovascular outcomes is uncertain. We hypothesized that tubular damage, measured by urine α1 -microglobulin (A1M), amino-terminal propeptide of type III procollagen (PIIINP), and neutrophil gelatinase-associated lipocalin (NGAL), would be associated with higher risks for cardiovascular events and mortality among elders. STUDY DESIGN: Case-cohort study...
March 27, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29599299/identification-of-patients-expected-to-benefit-from-electronic-alerts-for-acute-kidney-injury
#6
Aditya Biswas, Chirag R Parikh, Harold I Feldman, Amit X Garg, Stephen Latham, Haiqun Lin, Paul M Palevsky, Ugochukwu Ugwuowo, F Perry Wilson
BACKGROUND AND OBJECTIVES: Electronic alerts for heterogenous conditions such as AKI may not provide benefit for all eligible patients and can lead to alert fatigue, suggesting that personalized alert targeting may be useful. Uplift-based alert targeting may be superior to purely prognostic-targeting of interventions because uplift models assess marginal treatment effect rather than likelihood of outcome. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: This is a secondary analysis of a clinical trial of 2278 adult patients with AKI randomized to an automated, electronic alert system versus usual care...
March 29, 2018: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/29573172/quantification-of-urinary-protein-biomarkers-of-autosomal-dominant-polycystic-kidney-disease-by-parallel-reaction-monitoring
#7
Navin Rauniyar, Xiaoqing Yu, Jennifer Cantley, Edward Voss, Justin Belcher, Chris Colangelo, Kathryn Stone, Neera Dahl, Chirag Parikh, TuKiet T Lam, Lloyd G Cantley
PURPOSE: Autosomal Dominant Polycystic Kidney Disease (ADPKD) is a life-long disease in which the genes responsible are known, but the pathogenesis of cyst formation and cyst growth are not understood. Cyst growth ultimately leads to end stage renal failure in most patients. Analysis of the urinary proteome offers the potential to identify proteins that indicate the presence of cysts (and thus provides diagnosis) as well as the rates of cyst growth (providing prognostic information). EXPERIMENTAL DESIGN: We performed scheduled Parallel Reaction Monitoring (sPRM) assay on urine samples from 14 patients and 18 normal controls...
March 23, 2018: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/29511889/kidney-injury-biomarkers-5-years-after-aki-due-to-pediatric-cardiac-surgery
#8
Jason H Greenberg, Prasad Devarajan, Heather R Thiessen-Philbrook, Catherine Krawczeski, Chirag R Parikh, Michael Zappitelli
BACKGROUND: We previously reported that children undergoing cardiac surgery are at high risk for long-term chronic kidney disease (CKD) and hypertension, although postoperative acute kidney injury (AKI) is not a risk factor for worse long-term kidney outcomes. We report here our evaluation of renal injury biomarkers 5 years after cardiac surgery to determine whether they are associated with postoperative AKI or long-term CKD and hypertension. METHODS: Children aged 1 month to 18 years old undergoing cardiopulmonary bypass were recruited to this prospective cohort study...
June 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29472416/biomarkers-of-aki-progression-after-pediatric-cardiac-surgery
#9
Jason H Greenberg, Michael Zappitelli, Yaqi Jia, Heather R Thiessen-Philbrook, Christina A de Fontnouvelle, F Perry Wilson, Steven Coca, Prasad Devarajan, Chirag R Parikh
Background As children progress to higher stages of AKI, the risk for adverse outcomes dramatically increases. No reliable methods exist to predict AKI progression in hospitalized children. To determine if biomarkers of inflammation and kidney injury can predict AKI progression, we conducted a three-center prospective cohort study of children undergoing cardiopulmonary bypass. Methods On the first day of serum creatinine-defined AKI, we measured urine biomarkers (neutrophil gelatinase-associated lipocalin [NGAL], IL-18, kidney injury molecule 1, liver fatty acid binding protein [L-FABP], albumin, and cystatin C) and plasma biomarkers (IFN, IL-1, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12, IL-13, TNF- α , NGAL, and cystatin C)...
May 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29393541/the-association-of-discharge-decisions-after-deceased-donor-kidney-transplantation-with-the-risk-of-early-readmission-results-from-the-deceased-donor-study
#10
Meera Nair Harhay, Yaqi Jia, Heather Thiessen-Philbrook, Behdad Besharatian, Ramnika Gumber, Francis L Weng, Isaac E Hall, Mona Doshi, Bernd Schroppel, Chirag R Parikh, Peter P Reese
BACKGROUND: Kidney transplant (KT) recipients experience high rates of early (≤30 days) hospital readmission (EHR) after KT, and existing studies provide limited data on modifiable discharge factors that may mitigate EHR risk. METHODS: We performed a retrospective cohort study of 468 adult deceased donor KT recipients transplanted between 4/2010 and 11/2013 at 5 United States transplant centers. We fit multivariable mixed effects models to assess the association of two potentially modifiable discharge factors with the probability of EHR after KT: (i) weekend discharge and (ii) days to first scheduled follow-up...
February 2, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29344362/development-of-biomarker-combinations-for-postoperative-acute-kidney-injury-via-bayesian-model-selection-in-a-multicenter-cohort-study
#11
Allison Meisner, Kathleen F Kerr, Heather Thiessen-Philbrook, Francis Perry Wilson, Amit X Garg, Michael G Shlipak, Peter Kavsak, Richard P Whitlock, Steven G Coca, Chirag R Parikh
Background: Acute kidney injury (AKI) is a frequent complication of cardiac surgery. We sought prognostic combinations of postoperative biomarkers measured within 6 h of surgery, potentially in combination with cardiopulmonary bypass time (to account for the degree of insult to the kidney). We used data from a large cohort of patients and adapted methods for developing biomarker combinations to account for the multicenter design of the study. Methods: The primary endpoint was sustained mild AKI, defined as an increase of 50% or more in serum creatinine over preoperative levels lasting at least 2 days during the hospital stay...
2018: Biomarker Research
https://www.readbyqxmd.com/read/29326843/risk-of-acute-kidney-injury-in-patients-randomized-to-a-restrictive-versus-liberal-approach-to-red-blood-cell-transfusion-in-cardiac-surgery-a-substudy-protocol-of-the-transfusion-requirements-in-cardiac-surgery-iii-noninferiority-trial
#12
Amit X Garg, Nadine Shehata, Shay McGuinness, Richard Whitlock, Dean Fergusson, Ron Wald, Chirag Parikh, Sean M Bagshaw, Boris Khanykin, Alex Gregory, Summer Syed, Gregory M T Hare, Meaghan S Cuerden, Kevin E Thorpe, Judith Hall, Subodh Verma, Pavel S Roshanov, Jessica M Sontrop, C David Mazer
Background: When safe to do so, avoiding blood transfusions in cardiac surgery can avoid the risk of transfusion-related infections and other complications while protecting a scarce resource and reducing costs. This protocol describes a kidney substudy of the Transfusion Requirements in Cardiac Surgery III (TRICS-III) trial, a multinational noninferiority randomized controlled trial to determine whether the risk of major clinical outcomes in patients undergoing planned cardiac surgery with cardiopulmonary bypass is no greater with a restrictive versus liberal approach to red blood cell transfusion...
2018: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/29212948/elevated-urinary-creld2-is-associated-with-endoplasmic-reticulum-stress-mediated-kidney-disease
#13
Yeawon Kim, Sun-Ji Park, Scott R Manson, Carlos Af Molina, Kendrah Kidd, Heather Thiessen-Philbrook, Rebecca J Perry, Helen Liapis, Stanislav Kmoch, Chirag R Parikh, Anthony J Bleyer, Ying Maggie Chen
ER stress has emerged as a signaling platform underlying the pathogenesis of various kidney diseases. Thus, there is an urgent need to develop ER stress biomarkers in the incipient stages of ER stress-mediated kidney disease, when a kidney biopsy is not yet clinically indicated, for early therapeutic intervention. Cysteine-rich with EGF-like domains 2 (CRELD2) is a newly identified protein that is induced and secreted under ER stress. For the first time to our knowledge, we demonstrate that CRELD2 can serve as a sensitive urinary biomarker for detecting ER stress in podocytes or renal tubular cells in murine models of podocyte ER stress-induced nephrotic syndrome and tunicamycin- or ischemia-reperfusion-induced acute kidney injury (AKI), respectively...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29172665/group-analysis-identifies-differentially-elevated-biomarkers-with-distinct-outcomes-for-advanced-acute-kidney-injury-in-cardiac-surgery
#14
Haiqun Lin, Rebecca Scherzer, Heather Thiessen Philbrook, Steven G Coca, Francis Perry Wilson, Amit X Garg, Michael G Shlipak, Chirag R Parikh
AIM: To investigate early postoperative biomarkers for risk discrimination of advanced acute kidney injury (AKI). MATERIALS & METHODS: Postoperative plasma biomarkers including NGAL, h-FABP, CK-MB, hsTNT, NT-proBNP, IL-6, IL-10 and VEGF were analyzed using group-based method among 426 patients with AKI after cardiac surgery. RESULTS: Six patient groups with distinct biomarker patterns were identified. Individual biomarker displayed significant difference across the groups...
December 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/29157119/biomarker-combinations-for-diagnosis-and-prognosis-in-multicenter-studies-principles-and-methods
#15
Allison Meisner, Chirag R Parikh, Kathleen F Kerr
Many investigators are interested in combining biomarkers to predict a binary outcome or detect underlying disease. This endeavor is complicated by the fact that many biomarker studies involve data from multiple centers. Depending upon the relationship between center, the biomarkers, and the target of prediction, care must be taken when constructing and evaluating combinations of biomarkers. We introduce a taxonomy to describe the role of center and consider how a biomarker combination should be constructed and evaluated...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29130810/outcomes-after-angiography-with-sodium-bicarbonate-and-acetylcysteine
#16
RANDOMIZED CONTROLLED TRIAL
Steven D Weisbord, Martin Gallagher, Hani Jneid, Santiago Garcia, Alan Cass, Soe-Soe Thwin, Todd A Conner, Glenn M Chertow, Deepak L Bhatt, Kendrick Shunk, Chirag R Parikh, Edward O McFalls, Mary Brophy, Ryan Ferguson, Hongsheng Wu, Maria Androsenko, John Myles, James Kaufman, Paul M Palevsky
BACKGROUND: Intravenous sodium bicarbonate and oral acetylcysteine are widely used to prevent acute kidney injury and associated adverse outcomes after angiography without definitive evidence of their efficacy. METHODS: Using a 2-by-2 factorial design, we randomly assigned 5177 patients at high risk for renal complications who were scheduled for angiography to receive intravenous 1.26% sodium bicarbonate or intravenous 0.9% sodium chloride and 5 days of oral acetylcysteine or oral placebo; of these patients, 4993 were included in the modified intention-to-treat analysis...
February 15, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29074166/association-between-high-environmental-heat-and-risk-of-acute-kidney-injury-among-older-adults-in-a-northern-climate-a-matched-case-control-study
#17
Rebecca K McTavish, Lucie Richard, Eric McArthur, Salimah Z Shariff, Rey Acedillo, Chirag R Parikh, Ron Wald, Piotr Wilk, Amit X Garg
BACKGROUND: An association between high heat and acute kidney injury (AKI) has been reported in warm climates. However, whether this association generalizes to a northern climate, with more variable temperatures, is unknown. STUDY DESIGN: Matched case-control study. SETTING & PARTICIPANTS: Our study focused on older adults (mean age, 80 years) in the northern climate of Ontario, Canada. 52,913 case patients who had a hospital encounter with AKI in April through September 2005 to 2012 were matched with 174,222 controls for exact date, age, sex, rural residence, income, and history of chronic kidney disease...
February 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29070568/il-33-deficiency-slows-cancer-growth-but-does-not-protect-against-cisplatin-induced-aki-in-mice-with-cancer
#18
Kameswaran Ravichandran, Sara Holditch, Carolyn N Brown, Qian Wang, Abdullah Ozkok, Mary C Weiser-Evans, Raphael Nemenoff, Makoto Miyazaki, Heather Thiessen-Philbrook, Chirag R Parikh, Danica Ljubanovic, Charles L Edelstein
The effect of IL-33 deficiency on acute kidney injury (AKI) and cancer growth in a 4-wk model of cisplatin-induced AKI in mice with cancer was determined. Mice were injected subcutaneously with murine lung cancer cells. Ten days later, cisplatin (10 mg·kg-¹·wk-¹) was administered weekly for 4 wk. The increase in kidney IL-33 preceded the AKI and tubular injury, suggesting that IL-33 may play a causative role. However, the increase in serum creatinine, blood urea nitrogen, serum neutrophil gelatinase-associated lipoprotein, acute tubular necrosis, and apoptosis scores in the kidney in cisplatin-induced AKI was the same in wild-type and IL-33-deficient mice...
March 1, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28992097/association-of-serum-albumin-levels-with-kidney-function-decline-and-incident-chronic-kidney-disease-in-elders
#19
Joshua Lang, Ronit Katz, Joachim H Ix, Orlando M Gutierrez, Carmen A Peralta, Chirag R Parikh, Suzanne Satterfield, Snezana Petrovic, Prasad Devarajan, Michael Bennett, Linda F Fried, Steven R Cummings, Mark J Sarnak, Michael G Shlipak
Background: Previous studies in HIV-infected individuals have demonstrated serum albumin to be strongly associated with kidney function decline, independent of urine albumin and inflammatory markers. Lower serum albumin concentrations may be an under-appreciated risk factor for kidney function decline in elders. Methods: We performed a cohort analysis in the Health Aging and Body Composition Study, a cohort of well-functioning, bi-racial, community-dwelling elders between the age of 70 and 79 years...
August 23, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28882126/predictors-of-acute-renal-injury-study-paris-among-hiv-positive-individuals-design-and-methods
#20
Celia P Corona-Villalobos, Michael G Shlipak, Adrienne Tin, Chirag Parikh, Richard D Moore, Eric Vittinghoff, Jose Manuel Monroy-Trujillo, Mohamed G Atta, Michelle M Estrella
BACKGROUND: Acute kidney injury (AKI), which is common among HIV-positive individuals, may contribute to the excess burden of chronic kidney disease (CKD) in this patient population; however, conventional clinical methods to detect AKI do not capture kidney injury sufficiently early to prevent irreversible damage. Further, large observational and interventional studies of AKI generally exclude HIV-positive persons in spite of their disproportionate risk. METHODS: The Predictors of Acute Renal Injury Study (PARIS) is a prospective observational cohort study among HIV-positive individuals established to determine the ability of candidate kidney injury biomarkers to predict future hospitalized clinical AKI, to characterize hospitalized subclinical AKI, and to discern the risk of progressive kidney disease following subclinical and clinical AKI...
September 7, 2017: BMC Nephrology
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