Cystic fibrosis--its biochemical detection

Area of Science:

• Biochemistry
• Clinical Diagnostics
• Pediatrics

Background:

• Cystic fibrosis (CF) diagnosis requires monitoring end-organ disease processes.
• The sweat salt test is a key diagnostic tool, though not solely sufficient.
• Neonatal screening and pancreatic function tests are essential for comprehensive diagnosis.

Purpose of the Study:

• To critically evaluate biochemical methods for detecting and monitoring cystic fibrosis end-organ disease.
• To review the diagnostic utility of sweat electrolyte analysis, neonatal screening markers, and pancreatic function tests.

Main Methods:

• Analysis of the Gibson-Cooke sweat test for sodium (Na+) and chloride (Cl-) concentration.
• Review of neonatal screening methods including cystic fibrosis protein, enzyme activities, and immunoreactive trypsin.
• Evaluation of pancreatic dysfunction tests: meconium albumin, duodenal juice components, serum pancreatic isoamylase, and trypsinogen.

Main Results:

• The Gibson-Cooke sweat test remains the most discriminating method for cystic fibrosis diagnosis.
• Neonatal screening methods like immunoreactive trypsin contribute significantly to early detection.
• Pancreatic function tests are vital for establishing and confirming cystic fibrosis, especially for detecting malabsorption or pancreatic lesions.

Conclusions:

• Biochemical methods are indispensable for the comprehensive diagnosis and management of cystic fibrosis.
• A combination of sweat testing, neonatal screening, and pancreatic function assessment provides the most reliable diagnostic approach.
• Accurate interpretation of these biochemical markers is crucial for effective patient care in cystic fibrosis.