急性肝臓ポルフィリアのスクリーニング
Naome Mwesigwa1, Hadley Williamson1, Shalonda Turner2
1Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, 506 Robinson Research Building, Nashville, TN, 37232-880, USA.
まとめ
この研究では,静止性心拍動症候群 (POTS) の患者で急性肝臓ポルフィリア (AHP) の証拠は見つかりませんでした. 胃腸症状のあるPOTS患者では,AHPのスクリーニングは不要である可能性があります.
科学分野:
- 心臓病科
- 遺伝学
- 胃腸内科
背景:
- 静止性心拍動症候群 (POTS) は,立ち上がった時に心拍数が過剰に上昇し,めまいや機能低下などの症状を引き起こす.
- 急性肝臓ポルフィリア (AHP) は,POTSを潜在的に模倣する,重複する神経性および自律性症状を持つ希少な代謝障害です.
研究 の 目的:
- POTSと胃腸症状と診断された患者のAHPの流行を調査する.
- 分子と生化学検査を用いてPOTS患者のAHPを評価する.
主な方法:
- 胃腸症状のある50人のPOTS患者は,神経ホルモン評価とAHPの遺伝子/生化学スクリーニングを受けた.
- 遺伝子検査は4つの主要なAHP関連遺伝子に焦点を当てた.
- 尿分析では,ポルフォビリノゲン (PBG),デルタアミノレヴリン酸 (ALA),および全体ポルフィリンが測定され,クレアチニンに正常化されました.
主要な成果:
- すべてのPOTS患者は尿中のPBG,ALA,および総ポルフィリン濃度が正常であった.
- 4つの主要なAHP関連遺伝子の病原性変異は患者にはありませんでした.
- 3人の患者は,一般的な低発現フェロケラゼ遺伝子 (FECH) 変異に対してヘテロジゴスであった.
結論:
- 胃腸症状を呈するPOTS患者ではAHPの証拠は見つかりませんでした.
- この患者集団におけるAHPの定期的なスクリーニングは,その希少性と研究の否定的な結果のために推奨されません.
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