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Apoptosis and upregulation of TNF-${\alpha}$ and TRAIL receptor 1 (DR4) in the pathogenesis of food protein-induced enterocolitis syndrome

우유 단백질 유발성 장염 증후군의 병리 기전으로 세포 자멸사와 TNF-${\alpha}$, TRAIL receptor 1 (DR4)의 발현 증가

  • Hwang, Jin-Bok (Department of Pediatrics, Keimyung University School of Medicine) ;
  • Kim, Sang-Pyo (Department of Pathology, Keimyung University School of Medicine) ;
  • Kang, Yu-Na (Department of Pathology, Keimyung University School of Medicine) ;
  • Lee, Seong-Ryong (Department of Institute for Medical Science, Keimyung University School of Medicine) ;
  • Suh, Seong-Il (Department of Institute for Medical Science, Keimyung University School of Medicine) ;
  • Kwon, Taeg-Kyu (Department of Institute for Medical Science, Keimyung University School of Medicine)
  • 황진복 (계명대학교 의과대학 소아과학교실) ;
  • 김상표 (계명대학교 의과대학 병리학교실) ;
  • 강유나 (계명대학교 의과대학 병리학교실) ;
  • 이성룡 (계명대학교 의과대학 의과학연구소) ;
  • 서성일 (계명대학교 의과대학 의과학연구소) ;
  • 권택규 (계명대학교 의과대학 의과학연구소)
  • Received : 2009.12.27
  • Accepted : 2010.02.22
  • Published : 2010.04.15

Abstract

Purpose : Expression levels of tumor necrosis factor (TNF)-${\alpha}$ expression on the mucosa of the small intestine is increased in patients with villous atrophy in food protein-induced enterocolitis syndrome (FPIES). TNF-${\alpha}$ has been reported to induce apoptotic cell death in the epithelial cells. We studied the TNF family and TNF-receptor family apoptosis on the duodenal mucosa to investigate their roles in the pathogenesis of FPIES. Methods : Fifteen infants diagnosed as having FPIES using standard oral challenge test and 5 controls were included. Terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) staining was performed to identify the apoptotic cell death bodies. Immunohistochemical staining of TNF-${\alpha}$, Fas ligand (FasL) for TNF family and TNF-related apoptosis-including ligand (TRAIL) receptor 1 (DR4), TRAIL receptor 2 (DR5), and Fas for TNF-receptor family were performed to determine the apoptotic mechanisms. Results : $TUNEL^+$ was significantly more highly expressed in the duodenal mucosa of FPIES patients than in controls ($P$-0.043). TNF-${\alpha}$ ($P$=0.0001) and DR4 ($P$=0.003) were significantly more highly expressed in FPIES patients than in controls. Expression levels of FasL, Fas, and DR5 were low in both groups and were not significantly different between the 2 groups. Conclusion : These results suggest that FPIES pathogenesis is induced by apoptosis, and that TNF-${\alpha}$ expression and DR4 pathway may have an important role in apoptosis.

목 적: 융모 위축을 보이는 FPIES 환자의 소장 점막에는 TNF-${\alpha}$의 발현이 증가한다. TNF-${\alpha}$는 상피 세포의 세포 자렴사를 유발하는 것으로 알려져 있다. 저자들은 FPIES 병리생리의 특성을 알아보고자 십이지장 점막 조직에서 TNF family와 TNF-수용체 family의 세포 자멸사를 연구하였다. 방 법: 표준화된 경구 유발 시험을 통하여 FPIES로 진단된 15례의 환자와 5례의 대조군을 대상으로 연구하였다. 세포 자멸사를 확인하기 위하여 terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) 염색을 시행하였다. 세포 자멸의 기전을 알아 보기 위해 TNF family의 TNF-${\alpha}$, Fas ligand (FasL)와 TNF-수용체 family의 TNF-related apoptosis-including ligand (TRAIL) receptor 1 (DR4), TRAIL receptor 2 (DR5), Fas를 면역조직화학으로 염색하였다. 결 과: $TUNEL^+$ 세포는 대조군에 비하여 FPIES 환자군의 십이지장 점막에서 의미 있게 높게 발현하였다($P$=0.043). TNF-${\alpha}$ ($P$=0.0001)와 DR4 ($P$=0.003)도 대조군에 비하여 FPIES군에서 의미 있게 높게 발현하였다. FasL, Fas, DR5의 발현은 두 군 모두에서 낮았으며, 두 군간에 의미 있는 차이를 보이지도 않았다. 결 론: FPIES의 병리생리는 세포 자멸사에 의하여 발생하며, TNF-${\alpha}$의 발현과 DR4 경로가 세포 자멸사에서 중요한 역할을 하는 것으로 추정된다.

Keywords

References

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