Read by QxMD icon Read

Chirag parikh

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...
March 6, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
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)...
February 22, 2018: Journal of the American Society of Nephrology: JASN
Meera N 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 five 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: 1) weekend discharge, and 2) days to first scheduled follow-up...
February 2, 2018: Clinical Transplantation
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
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
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
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
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
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...
November 12, 2017: New England Journal of Medicine
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...
October 23, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
Kameswaran Ravichandran, Sara Holditch, Carolyn N Brown, Qian Wang, Abdullah Ozkok, Mary Cm Weiser-Evans, Raphael A Nemenoff, Makoto Miyazaki, Heather Thiessen-Philbrook, Chirag R Parikh, Danica Ljubanovic, Charles Louis Edelstein
The effect of IL-33 deficiency on AKI and cancer growth in a 4 week 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/week) was administered weekly for 4 weeks. 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, BUN, serum NGAL, ATN and apoptosis scores in the kidney in cisplatin-induced AKI was the same in wild type and IL-33 deficient mice...
October 25, 2017: American Journal of Physiology. Renal Physiology
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
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
Dennis G Moledina, Isaac E Hall, Heather Thiessen-Philbrook, Peter P Reese, Francis L Weng, Bernd Schröppel, Mona D Doshi, F Perry Wilson, Steven G Coca, Chirag R Parikh
BACKGROUND: The diagnosis of acute kidney injury (AKI), which is currently defined as an increase in serum creatinine (Scr) concentration, provides little information on the condition's actual cause. To improve phenotyping of AKI, many urinary biomarkers of tubular injury are being investigated. Because AKI cases are not frequently biopsied, the diagnostic accuracy of concentrations of Scr and urinary biomarkers for histologic acute tubular injury is unknown. STUDY DESIGN: Cross-sectional analysis from multicenter prospective cohort...
December 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
Christina A de Fontnouvelle, Jason H Greenberg, Heather R Thiessen-Philbrook, Michael Zappitelli, Jeremy Roth, Kathleen F Kerr, Prasad Devarajan, Michael Shlipak, Steven Coca, Chirag R Parikh
BACKGROUND: Inflammation is a key component of both acute kidney injury (AKI) and response to cardiopulmonary bypass. Because AKI poses risks to children after cardiac surgery, we investigated the value of inflammatory biomarkers interleukin-8 (IL-8) and tumor necrosis factor alpha (TNFα) for predicting AKI and other complications. METHODS: We enrolled 412 children between the ages of 1 month and 18 years undergoing cardiopulmonary bypass for cardiac surgery. We collected blood both preoperatively and postoperatively (within 6 hours post-surgery) and measured plasma IL-8 and TNFα...
December 2017: Annals of Thoracic Surgery
Chirag R Parikh, Jeremy Puthumana, Michael G Shlipak, Jay L Koyner, Heather Thiessen-Philbrook, Eric McArthur, Kathleen Kerr, Peter Kavsak, Richard P Whitlock, Amit X Garg, Steven G Coca
Clinical AKI, measured by serum creatinine elevation, is associated with long-term risks of adverse cardiovascular (CV) events and mortality in patients after cardiac surgery. To evaluate the relative contributions of urine kidney injury biomarkers and plasma cardiac injury biomarkers in adverse events, we conducted a multicenter prospective cohort study of 968 adults undergoing cardiac surgery. On postoperative days 1-3, we measured five urine biomarkers of kidney injury (IL-18, NGAL, KIM-1, L-FABP, and albumin) and five plasma biomarkers of cardiac injury (NT-proBNP, H-FABP, hs-cTnT, cTnI, and CK-MB)...
December 2017: Journal of the American Society of Nephrology: JASN
Kathleen F Kerr, Jeremy Roth, Kehao Zhu, Heather Thiessen-Philbrook, Allison Meisner, Francis Perry Wilson, Steven Coca, Chirag R Parikh
BACKGROUND/AIMS: A potential use of biomarkers is to assist in prognostic enrichment of clinical trials, where only patients at relatively higher risk for an outcome of interest are eligible for the trial. We investigated methods for evaluating biomarkers for prognostic enrichment. METHODS: We identified five key considerations when considering a biomarker and a screening threshold for prognostic enrichment: (1) clinical trial sample size, (2) calendar time to enroll the trial, (3) total patient screening costs and the total per-patient trial costs, (4) generalizability of trial results, and (5) ethical evaluation of trial eligibility criteria...
December 2017: Clinical Trials: Journal of the Society for Clinical Trials
Girish N Nadkarni, Steven G Coca, Allison Meisner, Shanti Patel, Kathleen F Kerr, Uptal D Patel, Jay L Koyner, Amit X Garg, Heather Thiessen Philbrook, Charles L Edelstein, Michael Shlipak, Joe El-Khoury, Chirag R Parikh
INTRODUCTION: Urinary biomarkers of kidney injury are presumed to reflect renal tubular damage. However, their concentrations may be influenced by other factors, such as hematuria or pyuria. We sought to examine what non-injury related urinalysis factors are associated with urinary biomarker levels. METHODS: We examined 714 adults who underwent cardiac surgery in the TRIBE-AKI cohort that did not experience post-operative clinical AKI (patients with serum creatinine change of ≥ 20% were excluded)...
July 6, 2017: BMC Nephrology
Jason H Greenberg, Chirag R Parikh
Pediatric AKI has become a significant health concern due to its rising incidence and association with adverse outcomes. Because of the limitations of serum creatinine, ongoing research has evaluated multiple novel biomarkers for the early detection of AKI. Identifying biomarkers that precede changes in serum creatinine is vital, because these biomarkers provide opportunities to improve outcomes through early diagnosis and timely disease management. In this review, we discuss salient findings on 16 candidate biomarkers and their association with AKI...
September 7, 2017: Clinical Journal of the American Society of Nephrology: CJASN
Jason H Greenberg, Aadil Kakajiwala, Chirag R Parikh, Susan Furth
Chronic kidney disease (CKD) has become a significant public health concern, as it is associated with substantial morbidity. Prior research has evaluated multiple novel CKD biomarkers to supplement serum creatinine and proteinuria. The ultimate goal of this research is to find biomarkers that can be used to accurately predict CKD progression and to better time outpatient follow-up, and referral for transplant. Also, an optimal panel of biomarkers can augment the predictive value of proteinuria and serum creatinine by enriching patient enrollment in clinical trials...
June 17, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"