JP6499287B2 - 特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤 - Google Patents
特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤 Download PDFInfo
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- JP6499287B2 JP6499287B2 JP2017527450A JP2017527450A JP6499287B2 JP 6499287 B2 JP6499287 B2 JP 6499287B2 JP 2017527450 A JP2017527450 A JP 2017527450A JP 2017527450 A JP2017527450 A JP 2017527450A JP 6499287 B2 JP6499287 B2 JP 6499287B2
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Description
[1]
間欠的に投与されることを特徴とする、副甲状腺ホルモン又はその誘導体を有効成分として含む特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[2]
1回あたり56.5μgの副甲状腺ホルモン又はその誘導体が週1回投与されることを特徴とする、[1]に記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[3]
副甲状腺ホルモン又はその誘導体がヒトPTH(1−34)である、[1]又は[2]に記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[4]
副甲状腺ホルモン又はその誘導体がテリパラチド酢酸塩である、[1]〜[3]のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[5]
病型がA、B、C1またはC2である特発性大腿骨頭壊死症患者に投与される、[1]〜[4]のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[6]
骨頭圧潰抑制の為の請求項[1]〜[5]のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[7]
皮下注射用の凍結乾燥製剤である、[1]〜[6]のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
[8]
24週以上の期間にわたり投与されることを特徴とする、[1]〜[7]のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
(2) 単純X線での骨頭内の帯状硬化像の形成
(3) 骨シンチグラムでの 骨頭のcold in hot 像
(4) MRIのT1強調画像における骨頭内バンド像
(5) 骨生検標本における修復反応層を伴う骨壊死像
本発明に係る発症予防及び/又は進行抑制剤の剤型は特に限定されないが、例えば、液剤であってもよく、用時に適当な溶剤、例えば注射用生理食塩液などに溶解して使用し得る凍結乾燥製剤であってもよい。本発明に係る発症予防及び/又は進行抑制剤は、皮下注射用の凍結乾燥製剤であることが好ましい。本発明に係る発症予防及び/又は進行抑制剤にはPTH又はPTH誘導体の他に必要な添加物(例えば、賦形剤、安定化剤、溶解補助剤、酸化防止剤、無痛化剤、等張化剤、pH調整剤、防腐剤等)を含めることもできる。このような添加物として、糖類、アミノ酸、又は食塩等を挙げることができる。添加剤として糖類を用いる場合には、糖類として、マンニトール、グルコース、ソルビトール、イノシトール、シュークロース、マルトース、ラクトース、トレハロースをPTH 1重量部に対して 1重量部以上(好ましくは50〜1000重量部)添加することが好ましい。添加剤として糖類及び食塩を用いる場合には、糖類1重量部に対して1/1000〜1/5重量部(好ましくは1/100〜1/10重量部)の食塩を添加することが好ましい。
本研究の目的と有用性につき説明し本研究参加に同意の得られた患者をPTH投与群とコントロール群(PTH非投与群)の2群に分けてランダム化2群間比較研究を行った。なお患者の割り付けは、割付因子を(年齢、性別、IONの誘因、病型分類)として基本的に最小化法を用いて実施した。PTH投与群の各患者に対して1週間に1回の頻度でPTH製剤(テリボン皮下注用56.5μg(旭化成ファーマ社製);単にテリボンと称する場合もある;本製剤有効成分はテリパラチド酢酸塩)をテリパラチドとして56.5μgの用量で皮下投与した。PTH投与群及びPTH非投与群の両群の患者に対してカルシウム・ビタミンD・マグネシウム製剤を基礎薬剤として経口投与した。投与期間は及び経過観察期間は製剤初回投与時を起点としてそれぞれ72週及び2年間とする。評価は以下の画像検査による評価を行う。
(1) レントゲン(両股関節正面像、股関節側面像の2方向)による骨頭圧潰の評価(非特許文献14)
試験スケジュールを図1に示す。
2. 試験結果
(実施例2)特発性大腿骨頭壊死に対する副甲状腺ホルモン製剤の臨床研究
投与開始から4、12、24、48、72週および96週経過時点でのレントゲンによる開始時に比べた病期の変化を示す(表6〜11)。
壊死範囲が大きく骨頭圧潰リスクの大きいタイプCを見るとPTH群ではC2は10股中4股で、C1は4股中4股で病期の進行が見られなかった。コントロール群ではC2は9股中8股で、C1では8股中5股で病期が進行していた。
現在までの病期の変化をみるとPTH群では13股中6股で病期の進行がみられた。コントロール群では19股中14股で病期の進行がみられた(表12)。
Claims (5)
- 1回あたり56.5μgの副甲状腺ホルモン又はその誘導体が週1回投与されることを特徴とする、副甲状腺ホルモン又はその誘導体を有効成分として含む特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤であって、前記副甲状腺ホルモン又はその誘導体が、ヒトPTH(1−34)またはテリパラチド酢酸塩である、前記特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
- 病型はA、B、C1またはC2である特発性大腿骨頭壊死症患者に投与される、請求項1に記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
- 骨頭圧潰抑制の為の請求項1または2に記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
- 皮下注射用の凍結乾燥製剤である、請求項1〜3のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
- 24週以上の期間にわたり投与されることを特徴とする、請求項1〜4のいずれかに記載の特発性大腿骨頭壊死症の発症予防及び/又は進行抑制剤。
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