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Apoptosis markers in liver biopsy of nonalcoholic steatohepatitis in pediatric patients.

Abstract：

:The natural history of pediatric nonalcoholic steatohepatitis is still unknown; however, there are differences between adult and pediatric presentation. Apoptosis may play an important role in pathophysiologic pathways involved in liver damage and progression. Our aim was to detect early apoptosis markers, activated caspase-3 and cleaved cytokeratin-18, in hepatocytes and to correlate their presence with clinical, serologic, and histologic characteristics in pediatric nonalcoholic steatohepatitis. Twenty-five pediatric nonalcoholic steatohepatitis liver biopsies were evaluated by immunohistochemistry for presence of activated caspase-3 and cleaved cytokeratin-18. Biopsy specimens were semiquantitatively graded for activity (steatosis, inflammation, and ballooning) and fibrosis. Records were reviewed for serum aspartate aminotransferase, alanine aminotransferase, cholesterol, triglycerides, and body mass index, which was elevated in 92% of cases. Serum aspartate aminotransferase and alanine aminotransferase were elevated in 32% and 68% of cases, respectively. Sixty percent of biopsies exhibited lobular steatosis grade 3, 84% lobular inflammatory activity grade 1, 72% ballooning grade 1, and 76% fibrosis stage 3. Cleaved cytokeratin-18 was associated with milder fibrosis (P = .02) and inflammation (P = .07), although there was no association with steatosis grade. Activated caspase-3 detection was also associated with low inflammatory grade (P = .03) but not with fibrosis and steatosis. This study reveals interesting differential features concerning nonalcoholic steatohepatitis histologic characteristics and apoptosis markers compared with adult cases. Because, in this pediatric series, apoptosis seemed to be an early event in the cascade of liver injury steps, it would be useful to consider caspase inhibitors as potential therapeutic strategies to prevent liver damage progression.

journal_name

Hum Pathol

journal_title

Human pathology

authors

Valva P,De Matteo E,Galoppo M,Pedreira A,Giacove G,Lezama C,Marco I,Galoppo MC,Preciado MV

doi

10.1016/j.humpath.2008.04.022

subject

Has Abstract

pub_date

2008-12-01 00:00:00

pages

1816-22

issue

12

eissn

0046-8177

issn

1532-8392

pii

S0046-8177(08)00253-0

journal_volume

39

pub_type

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