Archives of Gastroenterology Research

Mini Review Open Access

Gastrointestinal Reflux Related Aspiration (GRASP) and Airway Injury after Lung Transplantation: Insights into Pathophysiology and Role of Airway Biomarkers for Risk Stratification

Miguel M. Leiva-Juarez, MD, MSE , Frank D’Ovidio, MD, PhD

Lung transplantation remains the only long term treatment for end-stage pulmonary disease. The main limitation to allograft survival beyond the first year post transplant is development of chronic lung allograft dysfunction (CLAD). Among survivors, CLAD will develop in virtually all recipients and often will show signs of airway injury before any clinical manifestations appear. There is currently no specific treatment available and management depends largely on modification of risk factors. Recent efforts by our group and others have focused on understanding the underlying pathophysiology and development of clinical biomarkers to diagnose CLAD early and allow risk stratification before irreversible allograft injury.

Case Report Open Access

Disease Resolution after Cessation of Treatment in Patients with Eosinophilic Esophagitis

Qian Yuan , Jonathan N. Glickman , Wayne G. Shreffler

Eosinophilic esophagitis (EoE) is a chronic inflammatory condition of the esophagus. EoE is triggered in most patients by dietary allergens and mediated by type 2 immune responses. Over the past 3 decades, substantial progresses have been made in understanding EoE pathogenesis, management, and natural history. EoE affects children and adults, and the incidence and prevalence have increased over time. Untreated EoE can lead to severe complications including food impaction, small caliber esophagus, esophageal stricture, and esophageal perforation.

Mini Review Open Access

Food Protein-Induced Allergic Proctocolitis (FPIAP): New Insights into Pathogenesis and Implications

Qian Yuan

Food protein induced allergic proctocolitis (FPIAP) is one of the earliest presentations of food allergies in infancy. It is a non-immunoglobulin E (IgE)-mediated condition. Although the inflammation is located at the rectosigmoid colon, clinical symptoms are not limited to mucousy, bloody stools and often include gastroesophageal reflux (GER), feeding difficulties, irritability and poor sleep. 

Original Research Open Access

Abdominal Migraine in Children and Adolescents at a Single Tertiary Pediatric Gastroenterology Center: A Twelve-yea Experience on Clinical and Therapeutic Findings

Andréa Souza Hachem , Mary de Assis Carvalho , Gabriela Nascimento Hercos , Juliana Tedesco Dias , Carine Dias Ferreira de Jesus , Nilton Carlos Machado

Observational, retrospective cohort single-center study in consecutive cases of children and adolescents, referred for initial evaluation of chronic abdominal pain at the Pediatric Gastroenterology Outpatient Clinic. Inclusion criteria: Age between 4 and 17 years; Diagnosis of AM defined from structured questionnaires according to three consensus criteria (Rome III, Rome IV criteria, and The International Classification of Headache Disorders).

Mini Review Open Access

norUDCA, a Novel Therapeutic Approach to the Disposal of A1- antitrypsin Mutant Z Proteins

Youcai Tang , Jeffrey H. Teckman

α1-antitrypsin deficiency (AATD) is a well-known genetic disease. No effective medical therapy is currently available for the liver disease. 24-norursodeoxycholic acid (norUDCA) has shown potent anti-cholestatic, anti-inflammatory, and anti-fibrotic properties in experimental and human cholestatic liver diseases. In this minireview, we discuss the role of exogenous norUDCA in reducing accumulation of a1-antitrypsin mutant Z proteins (AATZ) in the livers of PiZ mice and the in vitro model, HTOZ cells.

Case Series Open Access

A Case Series of Rapid Resolution of Pediatric Eosinophilic Esophagitis with Dupilumab Treatment as Demonstrated by Sedation-Free Transnasal Esophagoscopy (TN-Eso)

Arsal Khan , Isabel N. O’Connell , Wayne G. Shreffler , Joel A. Friedlander , Qian Yuan

Eosinophilic esophagitis (EoE) is a chronic inflammatory disease of the esophagus. Dupilumab, a treatment for EoE, requires an initial endoscopic evaluation no sooner than 12 weeks after initiation. As it is costly and pediatric patients often experience fear and pain associated with the injection, this could lead to non-adherence or premature cessation of therapy. Here, we report a case series, as part of a larger ongoing study, in which subjects demonstrated an earlier response to dupilumab.

Mini Review Open Access

Cholestatic Pruritus: Current Management Approach and Emerging Therapies – Mini Review

Vishwajit Kode , Kidist K. Yimam

Cholestatic Pruritus is a phenomenon that occurs in disease processes that impair bile flow. This condition poses significant challenges to quality of life and is often underdiagnosed and undertreated. While the direct cause of cholestatic pruritus remains unclear, it likely involves a complex interplay between multiple biochemical pathways. Due to recent advances in diagnostic tools, more biochemical pathways of cholestatic pruritis have been discovered.

Review Article Open Access

Multifaceted Strategies for Managing Gastroesophageal Reflux Disease: A Study of Pharmacological and Non-Pharmacological Interventions

Akhilesh Kumar Kuril

Gastroesophageal Reflux Disease (GERD) is a chronic condition characterized by the retrograde flow of gastric contents into the esophagus, leading to symptoms such as heartburn, regurgitation, and potential esophageal injury. The pathophysiology of GERD primarily involves dysfunction of the lower esophageal sphincter (LES), impaired esophageal clearance, delayed gastric emptying, and transient LES relaxations. Additional contributing factors include hiatal hernia and obesity. The pharmacological management of GERD focuses on acid suppression and includes the use of proton pump inhibitors (PPIs), H2-receptor antagonists, antacids, and prokinetic agents.

Short Communication Open Access

Upregulation of Downstream Angiogenic Genes Using mRNA for the Transfection of Transcription Factor Hypoxia Inducible Factor 1 Alpha: A Short Communication

Mirza Farhana Iqbal Chowdhury , Farzad Mokhtari-Esbuie , Amid Yazdani , Jakub Wlodarczyk , Azadeh Nourmohammadi , Anjira S. Ambade , John M. Abraham , John W. Harmon

Hypoxia-inducible factor 1-alpha (HIF-1α) plays a critical role in regulating cellular responses to low oxygen levels. In our study, we transfected HIF-1α mRNA into human dermal fibroblasts and assessed its biological activity by measuring the upregulation of downstream angiogenic genes, aiming to investigate the delivery mechanism of HIF-1α mRNA and its functional impact. In this short communication, we will describe our transfection methodology, present the results we obtained, and discuss the potential implications of these findings for future therapeutic applications.