[Proliferating cell nuclear antigen (PCNA) in patients with malabsorption syndrome: comparative study with...

Area of Science:

• Pediatric Gastroenterology
• Histopathology
• Immunohistochemistry

Background:

• Small bowel biopsy analysis is crucial for diagnosing malabsorption syndromes in children.
• Assessing mucosal architecture and cellular proliferation provides key diagnostic insights.

Purpose of the Study:

• To evaluate the utility of morphometric analysis and PCNA immunostaining in pediatric small intestinal biopsies.
• To correlate crypt proliferative activity with architectural changes in giardiasis, malnutrition, and celiac disease.

Main Methods:

• Performed morphometric analysis and PCNA immunostaining on small intestinal biopsies from 16 children (8 months to 6 years).
• Analyzed biopsies from children with giardiasis, primary malnutrition, and celiac disease.
• Correlated PCNA positivity extent with the degree of architectural disorder (mucosal index).

Main Results:

• PCNA positivity was observed in the lower crypt portions, with varying heights across conditions (giardiasis: 156µm, malnutrition: 103µm, celiac disease: 182µm).
• Celiac disease showed significantly higher PCNA positivity compared to primary malnutrition (p < 0.01).
• A significant negative correlation existed between architectural disorder and crypt proliferative activity (PCNA(+) crypts).

Conclusions:

• Morphometric analysis and PCNA immunostaining are valuable adjuncts to standard histopathology for small bowel mucosa.
• These techniques can effectively assess architectural disorder and proliferative activity, aiding in celiac disease diagnosis.
• PCNA immunostaining highlights differences in crypt cell proliferation among pediatric malabsorption conditions.