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要旨●CEASの原因遺伝子であるsolute carrier organic anion transporter family member 2A1(SLCO2A1)遺伝子はプロスタグランジン輸送蛋白をコードする.SLCO2A1蛋白は小腸粘膜の血管内皮細胞に発現しており,in vitroの実験ではCEAS患者で認められた変異型SLCO2A1ではプロスタグランジン輸送能が障害されていた.これによりCEASの病態解明の手がかりを得たが,なぜCEASでは特徴的な潰瘍形態を呈するのか,同じくSLCO2A1遺伝子が原因と考えられている肥厚性皮膚骨膜症との関係についてはいまだ謎である.
The causative gene of CEAS, namely solute carrier organic transporter family member 2A1(SLCO2A1), encodes the PG(prostaglandin)transporter protein. The SLCO2A1 protein is expressed in vascular endothelial cells of the small intestinal mucosa, and in vitro experiments, the mutant SLCO2A1, found in patients with CEAS, had impaired PG-transporting abilities. Although these results provided a clue for clarifying CEAS pathology, the reason for CEAS presenting with a distinctive ulcer morphology and its association with pachydermoperiostosis, which is also considered to be caused by the SLCO2A1 gene, remain unknown.
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