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Serum Group I pepsinogens in children with recurrent abdominal pain
Insights
This study found no difference in serum pepsinogen I (PgI) levels between children with and without recurrent abdominal pain (RAP). These findings question the link between excess stomach acid and RAP in children.
Area of Science:
- Pediatric Gastroenterology
- Gastrointestinal Physiology
Background:
- Recurrent abdominal pain (RAP) is a frequent childhood issue.
- Acid hypersecretion is a suspected, yet unproven, cause of RAP.
- Serum group I pepsinogen (PgI) levels accurately reflect gastric acid secretion.
Purpose of the Study:
- To investigate the relationship between serum PgI levels and recurrent abdominal pain in children.
- To determine if acid hypersecretion is a significant factor in childhood RAP.
Main Methods:
- Utilized radioimmunoassay to measure serum PgI levels.
- Compared PgI levels in children with RAP to a control group without RAP.
- Assessed PgI as a marker for gastric acid secretory capacity.
Main Results:
- No significant difference was observed in serum PgI levels between children with and without RAP.
- Gastric acid secretory capacity, as indicated by PgI, did not differ between the groups.
Conclusions:
- Acid hypersecretion cannot be definitively demonstrated as a cause of recurrent abdominal pain in children.
- The proposed link between elevated gastric acid and RAP in pediatric patients is questionable.
Abstract:
Recurrent abdominal pain (RAP) is a common, frustrating problem in childhood. A commonly mentioned cause has been acid hypersecretion without evidence of actual ulceration. Recently, a radioimmunoassay specific for group I pepsinogens (PgI), one of two immunochemically distinct groups of human pepsinogens or precursor zymogens of pepsin, has been developed. Serum PgI levels have been demonstrated to reflect the acid secretory capacity of gastric mucosa, specifically the maximal and peak acid outputs (MAO, PAO), as well as the basal acid output (BAO), thus providing an accurate, tubeless determination of acid secretion. The present study of children with and without RAP has revealed no significant difference in serum PgI levels in these groups. These results suggest that acid hypersecretion cannot be demonstrated in RAP: therefore its relationship to RAP is questionable.