Medicine and Health Sciences Commons^™

Survival Of Patients With Subglottic Squamous Cell Carcinoma, S D. Macneil, K Patel, K Liu, S Shariff, J Yoo, A Nichols, K Fung, A X Garg

Anatomy and Cell Biology Publications

Objective: Subglottic squamous cell carcinoma is a rare subsite of laryngeal cancer that behaves more aggressively and portends a worse prognosis. Using a population-based cancer registry, our objective was to report overall survival (OS) and laryngectomy-free survival (LFS) in patients diagnosed with subglottic squamous cell carcinoma, and to determine whether primary laryngectomy results in improved survival.

Methods: This retrospective population-based study considered patients with a new diagnosis of squamous cell carcinoma in the province of Ontario over a 15-year period (1995-2009). The Ontario Cancer Registry was examined for patients with the diagnosis of interest during the period …

A Multicenter Study To Evaluate Pulmonary Function In Osteogenesis Imperfecta., Allison Tam, Shan Chen, Evan Schauer, Ingo Grafe, Venkata Bandi, Jay R. Shapiro, Robert D. Steiner, Peter A. Smith, Michael B. Bober, Tracy Hart, David Cuthbertson, Jeffrey Krischer, Mary Mullins, Peter H. Byers, Robert A. Sandhaus, Michaela Durigova, Francis H. Glorieux, Frank Rauch, Vernon Reid Sutton, Brendan Lee, Members Of The Brittle Bone Disorders Consortium, Eric T. Rush, Sandesh C S Nagamani

Manuscripts, Articles, Book Chapters and Other Papers

Pulmonary complications are a significant cause for morbidity and mortality in osteogenesis imperfecta (OI). However, to date, there have been few studies that have systematically evaluated pulmonary function in individuals with OI. We analyzed spirometry measurements, including forced vital capacity (FVC) and forced expiratory volume in the first second (FEV₁ ), in a large cohort of individuals with OI (n = 217) enrolled in a multicenter, observational study. We show that individuals with the more severe form of the disease, OI type III, have significantly reduced FVC and FEV₁ which do not follow the expected trends of the …

Rapid And Robust Restoration Of Breathing Long After Spinal Cord Injury, Philippa M. Warren, Stephanie C. Steiger, Thomas E. Dick, Peter M. Macfarlane, Warren J. Alilain, Jerry Silver

Spinal Cord and Brain Injury Research Center Faculty Publications

There exists an abundance of barriers that hinder functional recovery following spinal cord injury, especially at chronic stages. Here, we examine the rescue of breathing up to 1.5 years following cervical hemisection in the rat. In spite of complete hemidiaphragm paralysis, a single injection of chondroitinase ABC in the phrenic motor pool restored robust and persistent diaphragm function while improving neuromuscular junction anatomy. This treatment strategy was more effective when applied chronically than when assessed acutely after injury. The addition of intermittent hypoxia conditioning further strengthened the ventilatory response. However, in a sub-population of animals, this combination treatment caused excess …

One-Day Oral Polyethylene Glycol Based Cleanout Is Effective For Pre-Colonoscopy Preparation In Children., Ashwath S. Kumar, Brooke L. Beutler, Thomas M. Attard

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: The adequacy of pre-procedure preparation is the principal determinant of the quality of colonoscopy in pediatric as in adult patients. There is a lack of consensus, among providers on a standard pre-procedure regimen. Professional society guidelines include the use of Polyethylene glycol (PEG). Herein we report on the provider-assessed adequacy of a one day, age-categorized dosing, PEG based cleanout regimen in children undergoing colonoscopy in a tertiary institution.

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METHODS: The standard bowel preparation regime at our institution includes an age dependent minimum PEG dosing regimen in addition to clear liquids the day prior to the procedure. We retrospectively …

An Eqtl Landscape Of Kidney Tissue In Human Nephrotic Syndrome., Christopher E. Gillies, Rosemary Putler, Rajasree Menon, Edgar Otto, Kalyn Yasutake, Viji Nair, Paul Hoover, David Lieb, Shuqiang Li, Sean Eddy, Damian Fermin, Michelle T. Mcnulty, Nephrotic Syndrome Study Network (Neptune), Nir Hacohen, Krzysztof Kiryluk, Matthias Kretzler, Xiaoquan Wen, Matthew G. Sampson, Tarak Srivastava

Manuscripts, Articles, Book Chapters and Other Papers

Expression quantitative trait loci (eQTL) studies illuminate the genetics of gene expression and, in disease research, can be particularly illuminating when using the tissues directly impacted by the condition. In nephrology, there is a paucity of eQTL studies of human kidney. Here, we used whole-genome sequencing (WGS) and microdissected glomerular (GLOM) and tubulointerstitial (TI) transcriptomes from 187 individuals with nephrotic syndrome (NS) to describe the eQTL landscape in these functionally distinct kidney structures. Using MatrixEQTL, we performed cis-eQTL analysis on GLOM (n = 136) and TI (n = 166). We used the Bayesian "Deterministic Approximation of Posteriors" (DAP) to fine-map …

Phenotypical Characterization Of Human Rhinovirus Infections In Severely Premature Children, Geovanny F. Perez, Bassem Kurdi, Rosemary Megalaa, Krishna Pancham, Shehlanoor Huseni, Natalia Isaza, Carlos E. Rodriguez-Martinez, Dinesh Pillai, Gustavo Nino

Pediatrics Faculty Publications

Background: Human Rhinovirus (HRV) has been identified as the most common cause of acute respiratory infections and hospitalizations in premature children. It is unclear if premature children are more susceptible to HRV due to their decreased pulmonary reserve or because they have enhanced lower airway reactivity to HRV.

Methods: We conducted a retrospective analysis of the clinical respiratory presentation of all PCR-confirmed HRV infections in full-term and premature children aged ≤ 3 years in our institution. Standardized respiratory distress scores were developed to examine lower airway obstruction (i.e., wheezing, hyperinflation, and sub-costal retractions) along with markers of decreased pulmonary reserve …

Longitudinal Measures Of Deformation Are Associated With A Composite Measure Of Contractility Derived From Pressure-Volume Loop Analysis In Children., Shahryar M. Chowdhury, Ryan J. Butts, Carolyn L. Taylor, Varsha M. Bandisode, Karen S. Chessa, Anthony M. Hlavacek, Arni Nutting, Girish S. Shirali, G Hamilton Baker

Manuscripts, Articles, Book Chapters and Other Papers

Aims: The relationship between echocardiographic measures of left ventricular (LV) systolic function and reference-standard measures have not been assessed in children. The objective of this study was to assess the validity of echocardiographic indices of LV systolic function via direct comparison to a novel composite measure of contractility derived from pressure-volume loop (PVL) analysis.

Methods and results: Children with normal loading conditions undergoing routine left heart catheterization were prospectively enrolled. PVLs were obtained via conductance catheters. A composite invasive composite contractility index (ICCI) was developed using data reduction strategies to combine four measures of contractility derived from PVL analysis. Echocardiograms …

Bilateral Facial Spasm Following Guillain-Barré Syndrome, Zain Guduru, John Morgan, Kapil Sethi

Neurology Faculty Publications

Background: We report a patient who developed lower facial muscle spasm at rest and bilateral facial synkinesis several months after treatment of Guillain–Barré syndrome (GBS); this finding, to our knowledge, is hitherto unreported.

Phenomenology Shown: Bilateral synkinesis, facial muscles spasm at rest, bilateral postparalytic facial syndrome.

Educational Value: Aberrant regeneration of nerve fibers post GBS, resulting in facial muscles spasm at rest, bilateral synkinesis.

Hla-Dqa1 And Apol1 As Risk Loci For Childhood-Onset Steroid-Sensitive And Steroid-Resistant Nephrotic Syndrome., Adebowale Adeyemo, Christopher Esezobor, Adaobi Solarin, Asiri Abeyagunawardena, Jameela A. Kari, Sherif El Desoky, Larry A. Greenbaum, Margret Kamel, Mahmoud Kallash, Cynthia Silva, Alex Young, Tracey E. Hunley, Nilka De Jesus-Gonzalez, Tarak Srivastava, Rasheed Gbadegesin

Manuscripts, Articles, Book Chapters and Other Papers

Background: Few data exist for the genetic variants underlying the risk for steroid-sensitive nephrotic syndrome (SSNS) in children. The objectives of this study were to evaluate HLA-DQA1 and APOL1 variants as risk factors for SSNS in African American children and use classic HLA antigen types and amino acid inference to refine the HLA-DQA1 association.

Study design: Case-control study.

Setting & participants: African American children with SSNS or steroid-resistant nephrotic syndrome (SRNS) were enrolled from Duke University and centers participating in the Midwest Pediatric Nephrology Consortium.

Factor: Genetic variants in HLA-DQA1 (C34Y [rs1129740]; F41S [rs1071630]) and APOL1 high-risk alleles.

Outcomes: SSNS …

Central Nervous System Histoplasmosis: Multicenter Retrospective Study On Clinical Features, Diagnostic Approach And Outcome Of Treatment, Joseph Wheat, Thein Myint, Ying Guo, Phebe Kemmer, Chadi A. Hage, Colin Terry, Marwan M. Azar, James Riddell, Peter Ender, Sharon Chen, Kareem Shehab, Kerry Cleveland, Eden Esguerra, James Johnson, Patty Wright, Vanja Douglas, Pascalis Vergidis, Winnie Ooi, John Baddley, David Bamberger, Raed N. Khairy, Holenarasipur R. Vikram, Elizabeth Jenny-Avital, Geetha Sivasubramanian, Karen Bowlware, Barbara Pahud, Juan Sarria, Townson Tsai, Maha Assi, Satish Mocherla

Internal Medicine Faculty Publications

Central nervous system (CNS) involvement occurs in 5 to 10% of individuals with disseminated histoplasmosis. Most experience has been derived from small single center case series, or case report literature reviews. Therefore, a larger study of central nervous system (CNS) histoplasmosis is needed in order to guide the approach to diagnosis, and treatment.

A convenience sample of 77 patients with histoplasmosis infection of the CNS was evaluated. Data was collected that focused on recognition of infection, diagnostic techniques, and outcomes of treatment.

Twenty nine percent of patients were not immunosuppressed. Histoplasma antigen, or anti-Histoplasma antibodies were detected in the …

Mechanotransduction Signaling In Podocytes From Fluid Flow Shear Stress., Tarak Srivastava, Hongying Dai, Daniel P. Heruth, Uri S. Alon, Robert E. Garola, Jianping Zhou, R Scott Duncan, Ashraf El-Meanawy, Ellen T. Mccarthy, Ram Sharma, Mark L. Johnson, Virginia J. Savin, Mukut Sharma

Manuscripts, Articles, Book Chapters and Other Papers

Recently, we and others have found that hyperfiltration-associated increase in biomechanical forces, namely, tensile stress and fluid flow shear stress (FFSS), can directly and distinctly alter podocyte structure and function. The ultrafiltrate flow over the major processes and cell body generates FFSS to podocytes. Our previous work suggests that the cyclooxygenase-2 (COX-2)-PGE2-PGE2 receptor 2 (EP2) axis plays an important role in mechanoperception of FFSS in podocytes. To address mechanotransduction of the perceived stimulus through EP2, cultured podocytes were exposed to FFSS (2 dyn/cm2) for 2 h. Total RNA from cells at the end of FFSS treatment, 2-h post-FFSS, and 24-h …