JP2015514731A - 神経障害の処置における使用のためのエストロゲン成分 - Google Patents
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
- A61K31/565—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids not substituted in position 17 beta by a carbon atom, e.g. estrane, estradiol
- A61K31/567—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids not substituted in position 17 beta by a carbon atom, e.g. estrane, estradiol substituted in position 17 alpha, e.g. mestranol, norethandrolone
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Abstract
Description
式(I):
エストロゲン物質の前駆体、及び、1以上のエストロゲン物質及び/又は前駆体の混合物、
からなる群から選択されるエストロゲン成分を提供する。
式(I):
エストロゲン物質の前駆体であって、該前駆体が、少なくとも1つのヒドロキシル基の水素原子が炭素数1〜25の炭化水素カルボン酸、スルホン酸若しくはスルファミン酸のアシルラジカル、テトラヒドロフラニル、テトラヒドロピラニル、又は1残基あたり1個〜20個のグリコシド単位を含有する直鎖若しくは分岐鎖のグリコシド残基によって置換されている、エストロゲン物質の誘導体、及び、
1以上のエストロゲン物質及び/又は前駆体の混合物、
からなる群から選択されるエストロゲン成分を提供する。
式(I)(式中、R1は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R2は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R3は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R4は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R5はヒドロキシル基であり、R6はヒドロキシル基であり、R7はヒドロキシル基であり、かつR1、R2、R3及びR4のうちの3つ以下が水素原子である)を有するエストロゲン物質、
上記エストロゲン物質の前駆体、及び、
1以上のエストロゲン物質及び/又は前駆体の混合物、
からなる群から選択される。
式(I)(式中、R1は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R2は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R3は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R4は水素原子、ヒドロキシル基、又は炭素数1〜5のアルコキシ基であり、R5はヒドロキシル基であり、R6はヒドロキシル基であり、R7はヒドロキシル基であり、かつR1、R2、R3及びR4のうちの1つが水素原子、又は炭素数1〜5のアルコキシ基である)を有するエストロゲン物質、
上記エストロゲン物質の前駆体、及び、
1以上のエストロゲン物質及び/又は前駆体の混合物、
からなる群から選択される。
式(III):
かつR1、R2、R3、及びR4の少なくとも1つがヒドロキシル基、又は炭素数1〜5のアルコキシ基である)を有するエストロゲン物質、
上記エストロゲン物質の前駆体、及び、
1以上のエストロゲン物質及び/又は前駆体の混合物、
からなる群から選択される。
試験動物:
Sprague−Dawley妊娠ラットをJanvier(フランス)から入手した。出産後、新生仔ラットをそれらの雌親と共に収容し、12時間の明暗サイクルのもと、室温(25℃)にて通常通り飼育した。全ての実験プロトコルは、リエージュ大学倫理委員会による承認を受けた。動物の苦痛を最小限にするためのあらゆる努力がなされた。
新生仔ラットをシャム群、ビヒクル群、又はE4群に割り当てた。
低酸素性傷害への暴露から0時間、2時間及び4時間後に直腸プローブ(RET−4、BioMedical Instruments、ドイツ、ツェルニッツ)を備えた多目的体温計(BAT−10R、Physitemp Instruments Inc.、米国、ニュージャージー州、クリフトン)を用いて仔ラットの直腸温度を測定した。温度の変動を低く維持するため、巣から仔ラットを移動してから15分後に25℃室にて直腸温度の測定を行った(すぐに測定が行われた最初の低酸素後測定を除く)。直腸温度は、脳深部温度に非常によく対応することが示されている(Thoresen et al. 1996. Arch Dis Child Fetal Neonatal 74: F3-F9、Yager et al. 1993. Pediatr Res 34: 525-529)。
出生後14日目に仔ラットを屠殺した。動物を過剰量のペントバルビタールナトリウム(100mg/kg、ip)で深く麻酔した。
摘出した脳のパラホルムアルデヒド固定パラフィン包埋試料を、Paxinosラット脳アトラス(Paxinos and Watson 2007. In: The rat brain in stereotaxic coordinates, 6th edition)に従い海馬領域の同じレベルで冠状切片にした。切片の厚さは5μmであった。ヘマトキシリン−エオシン染色を行った。簡潔には、染色前に切片をキシレン中で脱パラフィンし、段階的なエタノール濃度中で再水和した。スライドをヘマトキシリンで染色し、数秒間水ですすぎ、その後1%エオシン中に置き、洗浄し、脱水し、カバーガラスで覆った。
各脳領域の3視野において倍率400倍で仔ラット脳のヘマトキシリン−エオシン染色切片に対して無傷細胞の計測を行った。皮質及び海馬(領域:歯状回(DG)、顆粒細胞下帯(SGZ)、アンモン角(CA1、CA2/CA3))で計測を行った。顕微鏡(Olympus BX51、Olympus、日本、東京)、画像スキャナ(DotSlide Digital Virtual Microscopy、Olympus、ドイツ)及びImageJソフトウェア(NIH、米国)を用いて切片を解析した。
神経細胞骨格の破壊の免疫組織化学的検出のため脳切片を加工した。抗原の回復のため、切片を10mmol/Lクエン酸緩衝溶液(pH6.0)中で100℃にて10分間加熱した。内因性ペルオキシダーゼ活性を、3%過酸化水素を用いて10分間阻害し、5%正常ヤギ血清を用いた2度目の阻害の後、1:1000に希釈した抗微小管結合タンパク質2(MAP2)抗体(マウスモノクローナル抗体;Sigma、米国、ミズーリ州、セントルイス)と共に室温にて1時間、切片をインキュベートした。すすいだ後、ビオチン化ヤギ抗マウス免疫グロブリンG(Vector Laboratories、カリフォルニア州、バーリンガム)を添加し、色素原として3,3’−ジアミノベンジジン(DAB)を用いてアビジン−ビオチン複合体法(Vector Laboratories)により抗体検出を行った。DABとの反応後、スライドを洗浄し、脱水し、カバーガラスで覆った。
切片を10mmol/Lクエン酸緩衝溶液(pH6.0)中で100℃にて10分間加熱した。内因性ペルオキシダーゼ活性を、3%過酸化水素を用いて10分間阻害し、5%正常ヤギ血清を用いた2度目の阻害の後、1:1000に希釈した抗ダブルコルチン(DCX)抗体(ウサギポリクローナル抗体;Abcam、英国、ケンブリッジ)及び1:100に希釈した抗血管内皮成長因子(VEGF)抗体(マウスモノクローナル抗体;Abcam、英国、ケンブリッジ)と共に、切片を4℃にて終夜インキュベートした。すすいだ後、1:1000で希釈したAlexa Fluor(商標)ヤギ抗ウサギ抗体、及び1:1000で希釈したAlexa Fluor(商標)ヤギ抗マウス抗体(Invitrogen Inc.、ベルギー、ヘント)を添加し、切片を室温にて1時間インキュベートした。蛍光試験用の4’,6−ジアミジノ−2−フェニルインドール(DAPI)を含有する封入剤を使用した(Vector Laboratories)。顕微鏡(Olympus Vanox AHBT3、Olympus)及びImageJソフトウェア(NIH)を用いて試料を解析した。DCX又はVEGFのいずれかの陽性染色細胞の合計をDAPI陽性細胞の総数で除算して陽性染色細胞の割合を定量化し、パーセンテージで表した。
血清試料において脳傷害マーカーであるS100Bタンパク質(カタログ番号CSB−E08066r、Cusabio Biotech Co., LTD、中国)、及びグリア細胞線維酸性タンパク質(GFAP)(カタログ番号E90068Ra、Uscn Life sciences Inc.、中国)を検出するためのELISAを、製造業者の推奨に従って行った。
StatViewソフトウェア(Abacus Concepts, Inc.、米国、カリフォルニア州、バークレー)を使用して解析を行った。ANOVAの後、P<0.05により有意性を示す、FisherのPLSD、Scheffeの検定及びBonferroni/Dunn事後検定を使用して統計学的比較を行った。全ての値を平均±SEMとして表す。
出産後、新生仔ラットを以下の4群のうちの1つに割り当てた:シャム群、ビヒクル群、E4 5mg/kg/日群及びE4 50mg/kg/日群。4日目〜7日目を含めて、仔ラットにビヒクル(ビヒクル群)若しくはE4(割り当てられた群に従い5mg/kg又は50mg/kg)を腹腔内注射するか、又は注射を全く行わなかった(シャム群)。7日目の最後の注射から30分後に、ビヒクル群及びE4(5mg/kg又は50mg/kg)群の動物を、左総頚動脈二重結紮及び切断を含む手術に供し、その後、11%〜8%が酸素で残部が窒素の酸素濃度が減少された状態で20分間吸入させた後、8%酸素及び92%窒素の一定の濃度で35分間吸入させることによって低酸素状態を生じさせた。シャム群は、左総頚動脈の結紮及び低酸素状態を含まない同様の処理に供した。全ての操作を37℃にて行った。出生後14日目に屠殺されるまで仔ラットを雌親と共に回復させた。
注射に必要なビヒクル及びE4の量を決定するため、4日目〜7日目に仔ラットの重量測定を行い、仔ラットの手術後の健康状態をモニターするために7日目から14日目までの間重量測定を行った。
脳重量の測定より、ビヒクル処置群よりもE4 5mg/kg群及び偽手術群で有意に重いことが明らかとなった(図2)。
ビヒクルで処置した群に由来する切片のみが、傷害と対側(右側)の海馬領域に伸びる梗塞領域で囲まれた、傷害と同側(左側)の海馬領域の可視的な組織破壊を示した(図3)。これらの結果は、いずれの用量でもE4が神経保護効果を有することを示している。
海馬のDG領域では、1視野あたりの無傷細胞数は、ビヒクル群よりもE4 5mg/kg群及び偽手術動物群において有意に多かった(図4)。SGZでは、E4 5mg/kg群のみがシャム群及びビヒクル群と比較して無傷細胞数が有意に多かったのに対し、CA1では、試験群間で有意差は検出されなかった。海馬のCA2/CA3領域では、E4 50mg/kg処置群のみが、ビヒクル処置群及びE4 5mg/kg群よりも無傷細胞数が有意に多かったのに対し、皮質では、E4 50mg/kg群はビヒクル群と比べた場合のみ無傷細胞の数が有意に多かった。これらの結果は、エステトロールが神経保護効果を有することを示している。
新生仔ラットを出生後4日目から以下の6群のうちの1つに割り当てた:シャム群(n=24)、ビヒクル群(n=14)、E4 1mg/kg/日群(n=11)、E4 5mg/kg/日群(n=14)、E4 10mg/kg/日群(n=14)、又はE4 50mg/kg/日群(n=19)。出生後4日目から、仔ラットにビヒクル(ビヒクル群)若しくはE4(E4群の割り当てに従って1mg/kg/日、5mg/kg/日、10mg/kg/日又は50mg/kg/日)のいずれかを腹腔内注射するか、又はビヒクル若しくはE4のいずれも注射しなかった(シャム群)。7日目の最後の注射から30分後に、動物をイソフルラン(導入:3.0%;維持、1.5%)で麻酔し、ビヒクル群及びE4群の仔ラットを左総頚動脈二重結紮及び切断を含む手術に供した。処置の後、仔ラットを雌親に返し、1時間回復させた。その後、仔ラットを加湿した低酸素in vivoキャビネット(CoyLab、米国、ミシガン州、グラスレイク)に置いた。11%〜8%が酸素で残部が窒素の酸素濃度が減少された状態で20分間吸入させた後、8%酸素及び92%窒素の一定の濃度で35分間吸入させることによって低酸素状態を生じさせた。全ての操作を37℃にて行った。シャム群を、左総頚動脈結紮後の低酸素状態及び注射を含まない同様の処理に供した。仔ラットを雌親と共に回復させ、出生後14日目に屠殺するまで通常通り飼育した。
試験群間で直腸温度の有意差はなく、エステトロールによる前処置は体温に影響しないことを示していた(データは示されていない)。
行われた操作及びエステトロールの前処置による仔ラットの手術後の健康状態をモニターするため、出生後7日目〜14日目を含めて体重をモニターした。図5は、出生後8日目及び13日目の偽手術仔ラット及びエステトロールで前処置した仔ラットの手術後体重がビヒクルで前処置した動物よりも有意に重かったことを示す。さらに、出生後9日目の偽手術動物及び10mg/kgのエステトロールで前処置した動物はビヒクル群よりも体重が有意に重かったのに対し、出生後10日目、11日目及び12日目の偽手術仔ラット、1mg/kgで前処置した仔ラット及び10mg/kgで前処置した仔ラットはビヒクル群よりも有意に体重が重いことを示した。出生後14日目の偽手術動物、ならびに1mg/kg、5mg/kg及び10mg/kgのエステトロールで前処置した動物は、ビヒクル群のみに対して体重が有意に重かった。しかしながら、出生後8日目、9日目、10日目、12日目の偽手術動物の体重は5mg/kg及び50mg/kgのエステトロール前処置群よりも有意に重かったのに対し、出生後11日目、13日目、14日目の偽手術動物は50mg/kgのエステトロール前処置群のみに対して体重が有意に重かった。
可能性のある脳傷害を評価するため、仔ラット脳の測定を行った。図6は、ビヒクル群(1.016±0.042g)よりもシャム群(1.225±0.006g)、ならびに1mg/kg E4(1.155±0.022g)、5mg/kg E4(1.181±0.023g)、10mg/kg E4(1.179±0.012g)、及び50mg/kg E4(1.163±0.016g)による前処置群で脳重量が有意に重かったことを示している。
ビヒクルで前処置した仔ラットの脳切片は、皮質まで及ぶ、傷害と同側の(左側の)海馬領域の可視的な組織破壊及び傷害を示した(図7AのA〜C)。
出生後14日目の低酸素虚血(HI)後に特定された同側のMAP2染色の喪失を、初期の灰白質領域脱落のマーカーとして使用した。無傷ニューロンを含む領域はMAP2による染色を呈したのに対し、梗塞領域はMAP2染色の喪失を示した。特に、ビヒクル群では、皮質にまで及ぶ、傷害半球と同側の海馬領域におけるMAP2染色の喪失があった(図8A(b))。MAP2陽性領域の比率の定量化により、エステトロールによる前処置後(図8B)、MAP2陽性領域の比率は、ビヒクル群(0.675±0.046)(図8A(b))よりも、偽手術動物(デフォルト1.0)(図8A(a))、及びエステトロール前処置群(1mg/kg E4(0.929±0.019)(図8A(c))、5mg/kg E4(0.889±0.063)(図8A(d))、10mg/kg E4(0.898±0.022)(図8A(e))、50mg/kg E4(0.922±0.031)(図8A(f)))で有意に高かったことが明らかとなった。
出生後14日目のDCX及びVEGFの発現を、それぞれ神経発生及び血管新生のマーカーとして使用した。エステトロール前処置により、ビヒクル群(32.833±2.625%)よりも10mg/kg E4で前処置した動物(55.8±5.658%)の海馬DG領域におけるDCX陽性染色細胞の割合が有意に高くなった(図9A)のに対し、同じ領域のVEGF陽性染色細胞の割合は、ビヒクル群(25.333±2.271%)よりも1mg/kg E4(43.5±2.083%)、5mg/kg E4(46.0±4.361%)、10mg/kg E4(47.0±5.362%)、及び50mg/kg E4(46.0±4.465%)で前処置した群で有意に高かった(図9B)。さらに、CA1領域では、DCX陽性染色細胞の割合は、ビヒクル群(11±1.518%)よりも5mg/kg E4群(35.2±3.309%)、及び10mg/kg E4群(34.1±6.664%)で有意に高かった(図9A)のに対し、VEGF陽性染色細胞の割合は、10mg/kg E4群(37.4±7.645%)のみで有意に高かった(図9B)。CA2/CA3領域では、DCX陽性染色細胞の割合は、ビヒクル群(6.417±1.033%)よりも5mg/kg E4群(30.3±3.7%)で有意に高かったのに対し、VEGF陽性染色細胞の割合は、1mg/kg E4群(34.1±6.855%)においてのみ有意差に達した(図9B)。皮質では、DCX及びVEGF陽性染色細胞の割合は、ビヒクル群(それぞれ、26.0±4.156%及び20.5±2.414%)のみに対して10mg/kg E4群(それぞれ、52.1±7.762%及び46.2±7.646%)で有意に高かった(それぞれ図9A〜図9B)。
S100B及びグリア線維酸性タンパク質(GFAP)を脳傷害のマーカーとして使用した。S100Bタンパク質及びGFAPタンパク質に関するELISAにより血清中のそれらの濃度を測定した。図10Aに示されるように、エステトロールによる前処置の後、S100Bの濃度は、ビヒクルで前処置した動物(698.925±57.342pg/ml)よりも偽手術動物(344.614±50.328pg/ml)、及び50mg/kg E4群(361±32.914pg/ml)で有意に低かったが、10mg/kg E4群ではS100B濃度はシャム群、5mg/kg E4群、及び50mg/kg E4群よりも有意に高かった。
本結果は、エステトロールが、HIEの動物モデルの海馬構造及び皮質において用量依存的な神経保護効果を有することを示している。また、本結果によれば、エステトロールによる前処置は、初期の灰白質の脱落を減少し、神経発生及び血管新生を促す。さらに、エステトロールによる前処置は、体重、脳重量又は体温に何らの有害効果も有していない。
エステトロールの治療効果を試験するため、新生仔ラットを出生後7日目に以下の6群のうちの1つに割り当てた:シャム群(n=29)、ビヒクル群(n=20)、1mg/kg E4群(n=16)、5mg/kg E4群(n=19)、10mg/kg/日 E4(n=17)及び50mg/kg/日 E4群(n=15)。出生後7日目に動物をイソフルラン(導入、3.0%;維持、1.5%)で麻酔し、ビヒクル群及びE4群の仔ラットを左総頚動脈二重結紮及び切断を含む手術に供した。手術後、仔ラットを雌親に返し、1時間回復させた。その後、仔ラットを加湿した低酸素in vivoキャビネット(CoyLab)に置いた。11%〜8%が酸素で残部が窒素の酸素濃度が減少された状態で20分間吸入させた後、8%酸素及び92%窒素の一定の濃度で35分間吸入させることによって低酸素状態を生じさせた。全ての操作を37℃で行った。
試験群間で直腸温度に有意差はなく、エステトロール処置は体温に影響しないことを示していた(データは示されていない)。
行われた操作及びエステトロールの処置による仔ラットの手術後の健康状態を評価するため、出生後7日目〜14日目に手術後の体重を測定した。図11は、出生後14日目の偽手術動物、及び1mg/kg E4群、5mg/kg E4群、10mg/kg E4群、及び50mg/kg E4群の動物は、ビヒクル群よりも体重が有意に重かったことを示す。偽手術動物は、5mg/kg E4処置群よりも有意に重い体重を示した。
図12は、ビヒクル群(0.937±0.022g)よりも偽手術動物(1.214±0.007g)、ならびに1mg/kg E4群(1.099±0.037g)、5mg/kg E4群(1.06±0.035g)、10mg/kg E4群(1.12±0.33g)及び50mg/kg E4(1.163±0.025g)において、脳重量が有意に重かったことを示す。偽手術動物は、5mg/kg E4群よりも有意に重い脳重量を示した。この結果パターンは、実施例3と同じである。
海馬のDG及びSGZ領域では、1視野あたりの無傷細胞数は、ビヒクル群の動物(図13AのB(b))よりも偽手術動物(図13AのB(a))で有意に高かった(それぞれ、160.8±7.074対88.2±19.477、及び60.8±4.635対28.3±6.73)(図13BのD)。CA1領域では、無傷細胞数は、ビヒクル群(28.4±6.997)(図13AのB(b))よりもシャム群(69.4±5.256)(図13AのB(a))、及び1mg/kg E4群(51.5±2.5)(図13AのB(c))で有意に高く、シャム群では、5mg/kg E4群(45.3±2.989)(図13B(d))、10mg/kg E4群(46.0±3.19)(図13AのB(e))、及び50mg/kg E4群(46.6±5.336)(図13AのB(f))よりも有意に高かった(図13BのD)。海馬のCA2/CA3領域では、偽手術動物(57.1±6.192)(図13AのB(a))及び10mg/kg E4で処置した動物(35.2±3.169)(図13AのB(e))は、ビヒクル群(13.8±3.018)よりも無傷細胞数が有意に多かったのに対し、シャム群は、1mg/kg E4群(33.9±4.306)、5mg/kg E4群(33.8±4.704)、10mg/kg E4群(35.2±3.169)、及び50mg/kg E4群(30.5±2.527)よりも無傷細胞数が有意に多かった(図13BのD)。皮質では、偽手術動物(70.1±6.165)(図13AのC(a))及び5mg/kg E4(57.1±7.012)(図13AのC(d))、10mg/kg E4(56.9±5.958)(図13AのC(e))及び50mg/kg E4(54.5±3.403)(図13AのC(f))で処置した動物は、ビヒクル群(23.2±3.872)(図13AのC(b))よりも有意に多い無傷細胞数を示したのに対し、シャム群は1mg/kg E4群(42.4±4.865)(図13AのC(c))よりも無傷細胞数が有意に多かった(図13BのD)。
実施例3で観察されたものと同じMAP2染色パターンが観察された。MAP2陽性領域の比率の定量化により(図14B)、MAP2陽性領域の比率は、ビヒクル群(0.656±0.091)(図14A(b))よりも偽手術動物(デフォルトで1.0)(図14A(a))、及びエステトロール処置群(1mg/kg E4(0.943±0.028)(図14A(c))、5mg/kg E4(0.89±0.037)(図14A(d))、10mg/kg E4(0.938±0.044)(図14A(e))、50mg/kg E4(0.966±0.036)(図14A(f)))において有意に高いことが明らかとなった。
海馬のDG領域では、DCX又はVEGFのいずれの染色も試験群間に有意差はなかった(図15)。CA1領域では、DCX陽性染色細胞の割合は、ビヒクル群(12.8±2.947%)よりも10mg/kg E4群(37.1±3.84)及び50mg/kg E4群(37.3±4.784%)で有意に高かった(図15A)のに対し、VEGF陽性染色細胞の割合は、ビヒクル処置動物(15.7±4.924%)よりも5mg/kg E4群(37.4±4.833%)、10mg/kg E4群(37.1±3.84%)、及び50mg/kg E4群(45.1±4.753%)で有意に高かった(図15B)。CA2/CA3領域では、DCX陽性染色細胞の割合は、ビヒクル処置した動物(10.4±2.868%)よりも10mg/kg E4群(42.5±5.986%)で有意に高かった(図15A)のに対し、VEGF陽性染色細胞の割合は試験群間に有意差はなかった(図15B)。皮質では、DCX陽性染色細胞の割合は、ビヒクル群(23.3±4.74%)よりも5mg/kg E4群(45.2±3.339%)、10mg/kg E4群(49.4±4.949%)、及び50mg/kg E4群(49.6±3.11%)で有意に高かった(図15A)のに対し、VEGF陽性染色細胞の割合は、10mg/kg E4処置群(49.4±4.949%)よりも偽手術動物(24.6±3.7%)で有意に低かった(図15B)。
図16に示されるように、ビヒクル群の動物よりも偽手術動物及びエステトロール処置動物において、S100Bタンパク質及びGFAPタンパク質の有意に低い発現が観察された。
本発明の結果は、エステトロールがHIEの動物モデルの海馬構造及び皮質において用量依存性の治療効果を有することを示す。また、本発明の結果によれば、エステトロール処置は、初期の灰白質の脱落を低減し、神経発生及び血管新生を促す。さらに、エステトロール処置は、体重、脳重量又は体温に対して何らの有害効果も有していない。
出生時仮死を経て、少なくとも1つの以下の症状:意識低下及びアシドーシス(pH<7.00又は12以上の塩基欠乏)、5以下の10分アプガールスコア、又は10分の進行中の蘇生を呈する新生児をエステトロールで処置した。
Claims (9)
- 神経障害の処置における使用のための、
式(I):
前記エストロゲン物質の前駆体であって、該前駆体が、少なくとも1つのヒドロキシル基の水素原子が炭素数1〜25の炭化水素カルボン酸、スルホン酸若しくはスルファミン酸のアシルラジカル、テトラヒドロフラニル、テトラヒドロピラニル、又は1残基あたり1個〜20個のグリコシド単位を含有する直鎖若しくは分岐鎖のグリコシド残基によって置換されている、エストロゲン物質の誘導体及び、
1以上の前記エストロゲン物質及び/又は前記前駆体の混合物、
からなる群から選択されるエストロゲン成分。 - R3がヒドロキシル基又は炭素数1〜5のアルコキシ基を表す、請求項1に記載の使用のためのエストロゲン成分。
- R1、R2、R3、R4のうちの3つが水素原子を表す、請求項1又は2に記載の使用のためのエストロゲン成分。
- 1,3,5(10)−エストラトリエン−3,15α,16α,17β−テトロール(エステトロール)である、請求項1〜3のいずれか一項に記載の使用のためのエストロゲン成分。
- 前記神経障害の処置が治療的である、請求項1〜4のいずれか一項に記載の使用のためのエストロゲン成分。
- 前記神経障害が、脳損傷、脊髄損傷、及び神経変性疾患を含む群から選択される、請求項1〜5のいずれか一項に記載の使用のためのエストロゲン成分。
- 前記神経障害が、低酸素性脳損傷、無酸素性脳損傷、外傷性脳損傷、アルツハイマー病、及びパーキンソン病を含む群から選択される、請求項1〜6のいずれか一項に記載の使用のためのエストロゲン成分。
- 低酸素性虚血性脳症(HIE)の処置における使用のための、請求項1〜7のいずれか一項に記載される使用のためのエストロゲン成分。
- 新生児の低酸素性虚血性脳症(HIE)の処置における使用のための、請求項1〜8のいずれか一項に記載される使用のためのエストロゲン成分。
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