Pseudo-Bartter's syndrome in an Egyptian infant with cystic fibrosis mutation N1303K

A Abdul Wahab1, I A Janahi, M M Marafia

  • 1Department of Pediatrics, Hamad Medical Corporation, Doha, Qatar. atiqa@qatar.net.qa

Insights

Cystic fibrosis (CF) should be considered in the Arab world, as demonstrated by an Egyptian infant with the N1303K mutation presenting with alkalosis and pancreas insufficiency. This highlights the importance of recognizing CFTR mutations in diverse populations.

Area of Science:

  • Medical Genetics
  • Pediatrics
  • Biochemistry

Background:

  • Cystic Fibrosis (CF) is a genetic disorder caused by mutations in the Cystic Fibrosis Transmembrane conductance Regulator (CFTR) gene.
  • The N1303K mutation in exon 21 is a common CFTR mutation.
  • Genetic screening for CFTR mutations is crucial for early diagnosis and management.

Observation:

  • An Egyptian infant presented with clinical manifestations including alkalosis, electrolyte disturbance, and pancreas insufficiency.
  • The infant was found to have the N1303K mutation in the CFTR gene.
  • This case underscores the presence of CF in the Arab world.

Findings:

  • The N1303K CFTR mutation can lead to significant clinical symptoms in infants.
  • The study reviews the frequency and distribution of the N1303K mutation in the Middle East.
  • Early identification of CFTR mutations is vital for affected infants.

Implications:

  • There is a need to increase awareness and diagnostic capabilities for cystic fibrosis in the Arab world.
  • Understanding the prevalence of specific CFTR mutations like N1303K in different regions is essential for genetic counseling and targeted therapies.
  • This case contributes to the broader understanding of CFTR mutation impact across diverse ethnicities and geographic locations.

Related Concept Videos

Cystic Fibrosis: Pathogenesis01:23

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation, but...
Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more similar...
Renal Tubule and Collecting Duct01:24

Renal Tubule and Collecting Duct

The renal tubule is divided into three parts: the proximal convoluted tubule (PCT), the Loop of Henle (LOH), and the distal convoluted tubule (DCT).
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
Glucose Transporters01:27

Glucose Transporters

Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Barrett Esophagus-II: Clinical Manifestations and Management01:21

Barrett Esophagus-II: Clinical Manifestations and Management

Individuals with Barrett's esophagus are often asymptomatic, but they may experience symptoms commonly associated with GERD, such as heartburn and acid regurgitation. Additional symptoms can include difficulty swallowing, chest pain, unintentional weight loss, blood in the stool (which may appear black, tarry, or bloody), and episodes of vomiting.
To diagnose Barrett's esophagus, healthcare providers often recommend an endoscopy for those showing symptoms of acid reflux. The procedure entails...
Giardiasis01:12

Giardiasis

Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...