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Ilonze C, Rai P, Galadanci N, Zahr R, Okhomina VI, Kang G, Padmanabhan D, Lebensburger J, Alishlash AS. Association of elevated tricuspid regurgitation velocity with cerebrovascular and kidney disease in children with sickle cell disease. Pediatr Blood Cancer 2024:e31002. [PMID: 38644595 DOI: 10.1002/pbc.31002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/07/2024] [Accepted: 03/21/2024] [Indexed: 04/23/2024]
Abstract
BACKGROUND Tricuspid regurgitation velocity (TRV), measured by echocardiography, is a surrogate marker for pulmonary hypertension. Limited pediatric studies have considered the association between TRV and surrogate markers of end-organ disease. METHODS We conducted a cross-sectional study that evaluated the prevalence of elevated TRV ≥2.5 m/s and its associations with renal and cerebrovascular outcomes in children with sickle cell disease (SCD) 1-21 years of age in two large sickle cell cohorts, the University of Alabama at Birmingham (UAB) sickle cell cohort, and the Sickle Cell Clinical Research and Intervention Program (SCCRIP) cohort at St. Jude Children's Research Hospital. We hypothesized that patients with SCD and elevated TRV would have higher odds of having either persistent albuminuria or cerebrovascular disease. RESULTS We identified 166 children from the UAB cohort (mean age: 13.49 ± 4.47 years) and 325 children from the SCCRIP cohort (mean age: 13.41 ± 3.99 years) with echocardiograms. The prevalence of an elevated TRV was 21% in both UAB and SCCRIP cohorts. Elevated TRV was significantly associated with cerebrovascular disease (odds ratio [OR] 1.88, 95% confidence interval [CI]: 1.12-3.15; p = .017) and persistent albuminuria (OR 1.81, 95% CI: 1.07-3.06; p = .028) after adjusting for age, sex, treatment, and site. CONCLUSION This cross-sectional, multicenter study identifies associations between surrogate markers of pulmonary hypertension with kidney disease and cerebrovascular disease. A prospective study should be performed to evaluate the longitudinal outcomes for patients with multiple surrogate markers of end-organ disease.
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Affiliation(s)
- Chibuzo Ilonze
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Parul Rai
- Division of Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Najibah Galadanci
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Rima Zahr
- Division of Pediatric Nephrology and Hypertension, Department of Pediatrics, University of Tennessee Health Science Center (UTHSC), Memphis, Tennessee, USA
| | - Victoria I Okhomina
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Guolian Kang
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Dakshin Padmanabhan
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jeffrey Lebensburger
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ammar Saadoon Alishlash
- Division of Pediatric Pulmonology and Sleep Medicine, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Verghese PS, Luckritz KE, Moudgil A, Chandar J, Ranch D, Barcia J, Lin JJ, Grinsell M, Zahr R, Engen R, Twombley K, Fadakar PK, Jain A, Al-Akash S, Bartosh S. Practice patterns and influence of allograft nephrectomy in pediatric kidney re-transplantation: A pediatric nephrology research consortium study. Pediatr Transplant 2021; 25:e13974. [PMID: 33512738 DOI: 10.1111/petr.13974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/14/2020] [Accepted: 12/19/2020] [Indexed: 11/28/2022]
Abstract
INTRODUCTION There are no guidelines regarding management of failed pediatric renal transplants. MATERIALS & METHODS We performed a first of its kind multicenter study assessing prevalence of transplant nephrectomy, patient characteristics, and outcomes in pediatric renal transplant recipients with graft failure from January 1, 2006, to December 31, 2016. RESULTS Fourteen centers contributed data on 186 pediatric recipients with failed transplants. The 76 recipients that underwent transplant nephrectomy were not significantly different from the 110 without nephrectomy in donor or recipient demographics. Fifty-three percent of graft nephrectomies were within a year of transplant. Graft tenderness prompted transplant nephrectomy in 91% (P < .001). Patients that underwent nephrectomy were more likely to have a prior diagnosis of rejection within 3 months (43% vs 29%; P = .04). Nephrectomy of allografts did not affect time to re-listing, donor source at re-transplant but significantly decreased time to (P = .009) and incidence (P = .0002) of complete cessation of immunosuppression post-graft failure. Following transplant nephrectomy, recipients were significantly more likely to have rejection after re-transplant (18% vs 7%; P = .03) and multiple rejections in first year after re-transplant (7% vs 1%; P = .03). CONCLUSIONS Practices pertaining to failed renal allografts are inconsistent-40% of failed pediatric renal allografts underwent nephrectomy. Graft tenderness frequently prompted transplant nephrectomy. There is no apparent benefit to graft nephrectomy related to sensitization; but timing / frequency of immunosuppression withdrawal is significantly different with slightly increased risk for rejection following re-transplant.
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Affiliation(s)
- Priya S Verghese
- Division of Pediatric Nephrology, Department of Pediatrics, Northwestern University Feinberg School of Medicine and Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - Kera E Luckritz
- Department of Pediatrics, C.S. Mott Children's Hospital Michigan Medicine, Ann Arbor, MI, USA
| | - Asha Moudgil
- Division of Pediatric Nephrology, Children National Hospital, Washington, DC, USA
| | - Jayanthi Chandar
- Division of Pediatric Nephrology, Department of Pediatrics, University of Miami Miller School of Medicine and Miami Transplant Institute, Miami, FL, USA
| | - Daniel Ranch
- Department of Pediatrics, Division of Pediatric Nephrology, Joe R. and Teresa Lozano Long School of Medicine, University of Texas Health at San Antonio, San Antonio, TX, USA
| | - John Barcia
- Division of Pediatric Nephrology, Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Jen-Jar Lin
- Department of Pediatrics Nephrology, Wake Forest University Baptist Health, Winston-Salem, NC, USA
| | - Matthew Grinsell
- Division of Nephrology and Hypertension, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Rima Zahr
- Division of Pediatric Nephrology, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Rachel Engen
- Division of Pediatric Nephrology, Department of Pediatrics, Northwestern University Feinberg School of Medicine and Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - Katherine Twombley
- Acute Dialysis Units, Pediatric Kidney Transplant, Medical University of South Carolina, Charleston, SC, USA
| | - Paul K Fadakar
- Pediatric Nephrology, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Amrish Jain
- Division of Pediatric Nephrology, Department of Pediatrics, Central Michigan University College of Medicine and Children's Hospital of Michigan, Detroit, MI, USA
| | - Samhar Al-Akash
- Division of Pediatric Nephrology, Department of Pediatrics, Driscoll Children's Hospital, Corpus Christi, TX, USA
| | - Sharon Bartosh
- Division of Pediatric Nephrology, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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Lebensburger JD, Gossett J, Zahr R, Wang WC, Ataga KI, Estepp JH, Kang G, Hankins JS. High bias and low precision for estimated versus measured glomerular filtration rate in pediatric sickle cell anemia. Haematologica 2021; 106:295-298. [PMID: 32107332 PMCID: PMC7776243 DOI: 10.3324/haematol.2019.242156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
| | - Jeffrey Gossett
- Department of Biostatistics, St. Jude Children Research Hospital, Memphis
| | - Rima Zahr
- Pediatric Nephrology and Hypertension, University of Tennessee Health Science Center at Memphis
| | - Winfred C Wang
- Department of Hematology, St. Jude Children Research Hospital, Memphis
| | - Kenneth I Ataga
- Center for Sickle Cell Disease, University of Tennessee Health Science Center at Memphis
| | - Jeremie H Estepp
- Department of Hematology, St. Jude Children Research Hospital, Memphis
| | - Guolian Kang
- St Jude Childrens Research Hospital, Memphis, TN
| | - Jane S Hankins
- Department of Hematology, St. Jude Children Research Hospital, Memphis, TN
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Oakley J, Zahr R, Aban I, Kulkarni V, Patel RP, Hurwitz J, Askenazi D, Hankins J, Lebensburger J. Acute Kidney Injury during Parvovirus B19-Induced Transient Aplastic Crisis in Sickle Cell Disease. Am J Hematol 2018; 93:10.1002/ajh.25140. [PMID: 29756409 PMCID: PMC6235726 DOI: 10.1002/ajh.25140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 05/10/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Jamie Oakley
- University of Alabama at Birmingham, Department of Pediatrics
| | - Rima Zahr
- University of Tennessee, Pediatric Nephrology
| | - Inmaculada Aban
- University of Alabama at Birmingham, Department of Biostatistics
| | - Varsha Kulkarni
- University of Alabama at Birmingham, Pediatric Hematology Oncology
| | - Rakesh P Patel
- University of Alabama at Birmingham Department of Pathology
| | - Julia Hurwitz
- St. Jude Children’s Research Hospital, Department of Infectious Diseases
| | - David Askenazi
- University of Alabama at Birmingham, Pediatric Nephrology
| | - Jane Hankins
- St. Jude Children’s Research Hospital, Department of Hematology
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Wellman TL, Jenkins J, Penar PL, Tranmer B, Zahr R, Lounsbury KM. Nitric oxide and reactive oxygen species exert opposing effects on the stability of hypoxia-inducible factor-1alpha (HIF-1alpha) in explants of human pial arteries. FASEB J 2003; 18:379-81. [PMID: 14657004 DOI: 10.1096/fj.03-0143fje] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Hypoxia induces angiogenesis, partly through stabilization of hypoxia-inducible factor-1alpha (HIF-1alpha), leading to transcription of pro-angiogenic factors. Here we examined the regulation of HIF-1alpha by hypoxia and nitric oxide (NO) in explants of human cerebrovascular smooth muscle cells. Cells were treated with NO donors under normoxic or hypoxic (2% O2) conditions, followed by analysis of HIF-1alpha protein levels. Treatment with the NO donor sodium nitroprusside reduced levels of HIF-1alpha, whereas NO donors, NOC-18 and S-nitrosoglutathione, increased HIF-1alpha levels. SIN-1, which releases both NO and superoxide (O2*-), reduced HIF-1alpha levels, suggesting that inhibitory NO donors may elicit effects through peroxynitrite (ONOO*-). O2*- generation by xanthine/xanthine oxidase also reduced HIF-1alpha levels, confirming an inhibitory role for reactive oxygen species (ROS). Furthermore, superoxide dismutase increased HIF-1alpha levels, and the NO scavenger carboxy-PTIO reversed HIF-1alpha stabilization by NO donors. Effects on HIF-1alpha levels correlated with vascular endothelial growth factor transcription but did not affect HIF-1alpha transcription, as measured by RT-PCR and luciferase-reporter assays. The results indicate that HIF-1alpha is stabilized by agents that produce NO and reduce ROS but destabilized by agents that increase ROS, including O2*- and ONOO*-. Thus we propose that the effect of NO on HIF-1alpha signaling is critically dependent on the form of NO and the physiological environment of the responding cell.
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Affiliation(s)
- Theresa L Wellman
- Department of Pharmacology, University of Vermont, Given Bldg., 89 Beaumont Ave., Burlington, Vermont 05405, USA
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