JP2016204264A - 酸化変性ldl複合体抑制剤 - Google Patents
酸化変性ldl複合体抑制剤 Download PDFInfo
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- JP2016204264A JP2016204264A JP2015083312A JP2015083312A JP2016204264A JP 2016204264 A JP2016204264 A JP 2016204264A JP 2015083312 A JP2015083312 A JP 2015083312A JP 2015083312 A JP2015083312 A JP 2015083312A JP 2016204264 A JP2016204264 A JP 2016204264A
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- ldl
- curcumin
- ldl complex
- inhibitor
- saa
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Abstract
Description
〔2〕慢性閉塞性肺疾患患者における血清アミロイドA/LDL複合体及び/又はα1−アンチトリプシン−LDL複合体の抑制剤である〔1〕記載の血清アミロイドA/LDL複合体及び/又はα1−アンチトリプシン−LDL複合体の抑制剤。
〔3〕クルクミン及びその類縁体から選ばれる1種以上を有効成分とする肺機能改善剤。
なお、クルクミンには、互変異性体であるケト型及びエノール型のいずれも含まれる。
ここで、SAA−LDLとは、HDLと結合して存在する急性相反応性蛋白の血清アミロイドA(SAA)が血管内炎症の場で、活性化した炎症細胞由来の活性酸素によって酸化され、低比重リポ蛋白(LDL)と結合した複合体をいう。また、AT−LDLとは、酸化されたα1アンチトリプシン(AT)と低比重リポ蛋白(LDL)が複合体形成したものをいう。SAA−LDLもAT−LDLも動脈硬化を促進する作用があり、心筋梗塞症などの重症の虚血性心疾患発症の原因になると考えられている。従って、クルクミン又はその類縁体は、COPD患者のSAA−LDL及びAT−LDLの増加を顕著に抑制し、動脈硬化の発症、ひいては虚血性心疾患の発症を抑制する。
また、一秒率は、スパイロメーターによる肺機能検査の重要な要素であり、70%以上が基準値となっており、これを70%以上に改善することは肺機能を顕著に改善する。
(1)被験者
被験者は、京都医療センターに通院中のかつ、日本呼吸器学会による分類基準によって0期〜II期(COPD予備群〜中等症)に分類された慢性閉塞性肺疾患(COPD)患者であり、かつ、禁煙後4ヶ月以上が経過した者とした。なお、本試験には48名が登録されたが、脱落やデータ欠損によって被験者39名(実薬投与群22名(平均年齢69.6歳)及びプラセボ薬投与群17名(平均年齢69.9歳)、両群間の年齢及び性分布に差はなし)が解析対象者となった。
実薬は、高吸収性クルクミン製剤であるセラクルミン(登録商標)と、賦形剤である二酸化ケイ素及びステアリン酸カルシウムとを配合したカプセルであり、該カプセル1粒中にはクルクミンが30mg含有したものである。なお、前記セラクルミン(登録商標)は、ウコン色素(主にクルクミン、僅かにクルクミン類縁体も含む)、デキストリン、マルトース、ガディガム及びクエン酸からなるものである。
一方、プラセボ薬は、上記セラクルミン(登録商標)からウコン色素をとり除き、かつ、色調を実薬と同じにするために着色料(食用黄色4号)を添加したもの、すなわち、デキストリン、マルトース、ガディガム、クエン酸、二酸化ケイ素、ステアリン酸カルシウム及び着色料(食用黄色4号)からなるカプセルであり、該カプセル中にはクルクミンを全く含まない。
上記1.の被験者を無作為に2群に分けて、上記2.に記載の実薬3カプセル(クルクミンとして90mg)又はプラセボ薬3カプセルを朝食後及び夕食後に服用(1日あたり6カプセル、すなわち、実薬の場合では1日あたりクルクミンを180mg摂取)し、これを24週間(6ヶ月)継続して行った。なお、被験者の症状は、試験薬投与開始前の観察期(3ヶ月以上)から安定していたことを確認した。
被験者に対して、試験検体投与前、投与12週間後及び24週間後に、a)自覚症状、b)血圧、脈拍数、体重及びc)臨床検査(血液学的検査、生化学的検査、尿検査、その他)の観察及び検査を実施した。
なお、血液学的検査では赤血球数、血色素量、ヘマトクリット値、白血球数、血小板数及びフィブリノーゲンを、生化学的検査では総蛋白、総ビリルビン、AST(GOT)、ALT(GPT)、Al−P、LDH、BUN、クレアチニン、尿酸、LDL−コレステロール、HDL−コレステロール、CPK、空腹時血糖、中性脂肪、Na、K、Cl及びCRPを、尿検査では蛋白、潜血及び糖(いずれも定性)を常法に従って測定した。
SAA−LDL及びAT−LDLは、これらの測定を受託して実施する会社の株式会社いかがくに委託した。
肺機能は、常法に従い、スパイロメーターを用いて測定した。
被験者の年齢及び性分布について、プラセボ群(17名、69.9歳)とクルクミン群(22名、69.6歳)との間には差を認めなかった。なお、本試験には被験者48名が登録され、脱落やデータ欠損により39名の被験者を解析の対象とした。
また、両群とも、内服前後で、BMI、体重、血圧、HbA1c、LDL−C、TG、HDL−Cの変化は認めなかった。
また、AT−LDLの%変化率についても同様に調べたところ、プラセボ投与群(14.8±23.8%増加)と比較して、クルクミン投与群では(1.6±16.7%減少)と有意に後者で低値であった(p=0.020)。
さらに、クルクミン投与群では、予測一秒率が投与前(67.5±5.0%)から投与6ヶ月後(71.3±8.8%)にかけて有意に(p=0.034)改善した。投与前後での変化につき相関を検討すると、クルクミン群では予測一秒率とAT−LDLに負の相関関係が認められた(r=−0.592、p=0.008)。
以上の結果から、クルクミンを経口摂取することによって、SAA−LDL及びAT−LDLの血中濃度が減少し、かつ、肺機能が改善することが分かった。
Claims (3)
- クルクミン及びその類縁体から選ばれる1種以上を有効成分とする血清アミロイドA/LDL複合体及び/又はα1−アンチトリプシン−LDL複合体の抑制剤。
- 慢性閉塞性肺疾患患者における血清アミロイドA/LDL複合体及び/又はα1−アンチトリプシン−LDL複合体の抑制剤である請求項1記載の血清アミロイドA/LDL複合体及び/又はα1−アンチトリプシン−LDL複合体の抑制剤。
- クルクミン及びその類縁体から選ばれる1種以上を有効成分とする肺機能改善剤。
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