JP2013520463A - 血管新生促進療法用ケイ素含有生分解性材料 - Google Patents
血管新生促進療法用ケイ素含有生分解性材料 Download PDFInfo
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Abstract
Description
a)テトラエトキシシランの加水分解・縮合反応を少なくとも1回実施する工程と、
b)好ましくは反応系を穏和に混合しながら蒸発させて単相溶液を生成する工程と、
c)単相溶液を冷却する工程と、
d)熟成させてシリカゾル材料を生成する工程と、
e)シリカゾル材料から紡糸して繊維もしくは繊維マトリックスを生成する工程、及び/又はシリカゾル材料を乾燥、特に噴霧乾燥もしくは凍結乾燥して粉末を生成し、場合により粉末を溶媒に溶解して液体製剤を生成する工程、及び/又はケイ素含有生分解性材料で被覆しようとする対象物をシリカゾル材料で被覆する工程、及び/又はシリカゾル材料を注型してモノリスを生成する工程
により製造することができる。
a)貧血、狭心症、(末梢)動脈閉塞症、動脈硬化症、バージャー病、心筋梗塞、特に心筋、肺の虚血、心筋症、鬱血性心不全、冠動脈再狭窄等の冠動脈疾患、遺伝性出血性毛細血管拡張症、高コレステロール血症、虚血性心疾患、心筋性強皮症、血管内膜肥厚、血管閉塞、動脈硬化性末梢血管疾患、門脈圧亢進症、子癇前症、リウマチ性心疾患、高血圧、血栓塞栓症等の血液循環及び/又は心臓血管系疾患、
b)骨/軟骨修復、骨欠損、骨折、骨成長、軟骨疾患、椎間板変性、変形性関節症、骨粗鬆症、脊髄骨折、線維筋痛症、多発性筋炎等の骨、軟骨及び筋肉に関連する疾患、
c)中枢神経系又は末梢神経系の虚血、アルツハイマー病、筋萎縮性側索硬化症、自律神経性ニューロパチー、動脈瘤、脳梗塞、脳卒中、脳血管疾患、脳血管低潅流、痴呆、癲癇、虚血性末梢性ニューロパチー、軽症認知障害、多発性硬化症、神経損傷、パーキンソン病、ニーマン・ピック病、多発ニューロパチー、統合失調症、脊髄損傷、中毒性ニューロパチー等の中枢神経系疾患、
d)緑内障、網膜症等の眼疾患、
e)クローン病、胃潰瘍、腸虚血、過敏性腸症候群、膵炎、潰瘍性大腸炎等の胃腸疾患、
f)糖尿病、糖尿病性足病変、糖尿病性末梢血管疾患等のホルモン又は代謝疾患、
g)アレルギー、肥満細胞症、シェーグレン病、移植片拒絶反応、膠原病におけるシェーグレン症候群等の組織欠損、皮膚筋炎、全身性エリテマトーデス、クレスト症候群、シャープ症候群等の免疫系疾患、
h)敗血症性ショック等の感染症、
i)腎症、頭蓋内圧亢進、腎虚血等の腎疾患、
j)歯垢、歯周病等の口腔疾患、
k)勃起不全等の生殖器系疾患、
l)喘息、気管支肺異形成症、肺炎、呼吸窮迫症候群等の呼吸器疾患、
m)非特異性皮膚炎、褥瘡性潰瘍、皮膚虚血、皮膚潰瘍、糖尿病性壊疽、糖尿病性皮膚潰瘍、裂傷、疥癬、強皮症、皮膚損傷、熱傷、手術創、創傷治癒等の皮膚疾患、
n)血管不全、血管再狭窄、血管炎、血管痙攣、ウェゲナー肉芽腫症等の血管疾患、
o)脱毛症、乳酸アシドーシス、四肢虚血、肝硬変、肝虚血、ミトコンドリア脳筋症、サルコイドーシス、(特に事故、手術又は奇形による)軟部組織欠損、組織及び/又は臓器の自家移植片で治療される疾患等の他の疾患
が挙げられる。
a)特に心筋の虚血等の血液循環及び心臓血管系疾患、
b)中枢神経系又は末梢神経系の虚血等の中枢神経系疾患、
c)歯垢、歯周病等の口腔疾患、
d)軟部組織欠損、組織及び/又は臓器の自家移植片で治療される疾患
から選択される疾患を意味する。
a)少なくとも2種類の異なる圧力で繊維マトリックスの形態のポリヒドロキシケイ酸エチルエステル化合物の厚さを測定する段階と、
b)測定値の対(測定された厚さと圧力)を圧力の対数に対する厚さとしてグラフにプロットする段階と、
c)(d/d0)=(p/p0)−b(式中、p0は0.25kPaの圧力を表し、d0はp0における繊維マトリックスの厚さの計算値であり、bは曲線の指数である)により回帰分析する段階と、
d)k=(1−d1.25/d0)(式中、d1.25は1.25Paでの回帰分析から計算した厚さに対応する)による回帰分析に基づいて圧縮率[k]を計算する段階
により測定される。
加水分解・縮合反応原料として、TEOS(テトラエトキシシラン)1124.98gを撹拌機付容器に加えた。溶媒としてEtOH 313.60gを加えた。混合物を撹拌した。別に、1n HNO3(55.62g)をH2O(120.76g)で希釈し、TEOS−エタノール混合物に加えた。混合物を18時間撹拌した。
試験構成:TCS Cellworks社(Buckingham,英国)製血管新生アッセイキットを新血管新生の測定に使用した。24ウェル細胞培養プレートを使用し、その底にヒト線維芽細胞とヒト内皮細胞から構成される単層をコンフルエントまで増殖させた。試験を実施するために必要な全細胞培養培地と、内皮細胞特異的表面抗原(CD31、ヴォン・ヴィレブランド因子=vWF)の検出用抗体もTCS Cellworks社から入手した。試験を実施するために、更に24ウェル細胞培養プレートに適したプラスチックインサート(各種基質を保持できるもの)を使用した。プラスチックインサートの内容物は細胞培養培地からの膜により分離される。他方、膜の透過性により、インサートの内容物と細胞培養培地の間では溶解物質の交換が可能である。
本発明のポリヒドロキシケイ酸エチルエステル繊維マトリックス(A1、A2、B1及びB2)を動物モデル(ブタ;Middelkoop E,et al.,Porcine wound models for skin substitution and burn treatment.Biomaterials.2004 Apr;25(9):1559−67)で最も信頼できる臨床基準(nSHT=網状剥離植皮片;MDM=Dr.Suwelack Skin & Health Care AG.製品Matriderm(登録商標))と比較した。このために、ヨークシャーブタに3×3cm、深さ2.7mmの創傷(グレード3の開放創)を形成した。本発明のポリヒドロキシケイ酸エチルエステル繊維マトリックス(A1、A2、B1及びB2)と対照をこれらの開放創に移植し、比較した。各マトリックスを4箇所の異なる創傷に適用した。移植から13日後に創傷領域から生検を採取し、免疫組織化学試験を行った。血管について、ヴォン・ヴィレブランド因子(vWF;Ulrich MM,et al.,Expression profile of proteins involved in scar formation in the healing process of full−thickness excisional wounds in the porcine model.Wound Repair Regen.2007 Jul−Aug;15(4):482−90)を抗体で染色した。染色をデジタル画像解析により評価した。結果を定量化するためにNIS−Arソフトウェア(ニコン)を使用した。対照に比較して本発明の材料のvWF領域の明白な染色増加(約2.8倍)が認められた(表4参照)。
Claims (8)
- 血管新生低下及び/もしくは障害を伴う疾患並びに/又は血管新生率増加が治癒過程に有益となる疾患の予防及び/又は治療用ケイ素含有生分解性材料であって、ケイ素含有生分解性材料がポリヒドロキシケイ酸エチルエステル化合物であり、但し、慢性糖尿病性・神経障害性潰瘍、慢性下腿潰瘍、褥瘡、二次治癒感染創、特にアブレーションによる裂傷又は擦過傷等の非炎症性一次治癒創等の創傷は除外する、前記ケイ素含有生分解性材料。
- 材料が繊維、繊維マトリックス、粉末、液体製剤、モノリス及び/又はコーティングの形態である請求項1に記載のケイ素含有生分解性材料。
- a)テトラエトキシシランの加水分解・縮合反応を少なくとも1回実施する工程と、
b)好ましくは反応系を穏和に混合しながら蒸発させて単相溶液を生成する工程と、
c)単相溶液を冷却する工程と、
d)熟成させてシリカゾル材料を生成する工程と、
e)シリカゾル材料から紡糸して繊維もしくは繊維マトリックスを生成する工程、及び/又はシリカゾル材料を乾燥、特に噴霧乾燥もしくは凍結乾燥して粉末を生成し、場合により粉末を溶媒に溶解して液体製剤を生成する工程、及び/又はケイ素含有生分解性材料で被覆しようとする対象物をシリカゾル材料で被覆する工程、及び/又はシリカゾル材料を注型してモノリスを生成する工程
により製造された請求項2に記載のケイ素含有生分解性材料。 - 工程a)においてテトラエトキシシランを初期pH0〜≦7で場合により水溶性溶媒、好ましくはエタノールの存在下で温度0℃〜80℃にて酸触媒反応に供し、
工程b)において4℃で剪断速度10s−1における粘度が0.5〜2Pa・sの範囲になるまで単相溶液を蒸発させる請求項3に記載の方法により製造されたケイ素含有生分解性材料。 - 工程a)においてSi化合物に対して1:1.7〜1:1.9の範囲、好ましくは1:1.7〜1:1.8の範囲のモル比の硝酸水溶液を使用して酸触媒反応を実施する請求項4に記載のケイ素含有生分解性材料。
- 血管新生低下及び/もしくは障害を伴う疾患並びに/又は血管新生率増加が治癒過程に有益となる疾患が、
a)貧血、狭心症、(末梢)動脈閉塞症、動脈硬化症、バージャー病、心筋梗塞、特に心筋、肺の虚血、心筋症、鬱血性心不全、冠動脈再狭窄等の冠動脈疾患、遺伝性出血性毛細血管拡張症、高コレステロール血症、虚血性心疾患、心筋性強皮症、血管内膜肥厚、血管閉塞、動脈硬化性末梢血管疾患、門脈圧亢進症、子癇前症、リウマチ性心疾患、高血圧、血栓塞栓症等の血液循環及び/又は心臓血管系疾患、
b)骨/軟骨修復、骨欠損、骨折、骨成長、軟骨疾患、椎間板変性、変形性関節症、骨粗鬆症、脊髄骨折、線維筋痛症、多発性筋炎等の骨、軟骨又は筋肉に関連する疾患、
c)中枢神経系又は末梢神経系の虚血、アルツハイマー病、筋萎縮性側索硬化症、自律神経性ニューロパチー、動脈瘤、脳梗塞、脳卒中、脳血管疾患、脳血管低潅流、痴呆、癲癇、虚血性末梢性ニューロパチー、軽症認知障害、多発性硬化症、神経損傷、パーキンソン病、ニーマン・ピック病、多発ニューロパチー、統合失調症、脊髄損傷、中毒性ニューロパチー等の中枢神経系疾患、
d)緑内障、網膜症等の眼疾患、
e)クローン病、胃潰瘍、腸虚血、過敏性腸症候群、膵炎、潰瘍性大腸炎等の胃腸疾患、
f)糖尿病、糖尿病性足病変、糖尿病性末梢血管疾患等のホルモン又は代謝疾患、
g)アレルギー、肥満細胞症、シェーグレン病、移植片拒絶反応、膠原病におけるシェーグレン症候群等の組織欠損、皮膚筋炎、全身性エリテマトーデス、クレスト症候群、シャープ症候群等の免疫系疾患、
h)敗血症性ショック等の感染症、
i)腎症、頭蓋内圧亢進、腎虚血等の腎疾患、
j)歯垢、歯周病等の口腔疾患、
k)勃起不全等の生殖器系疾患、
l)喘息、気管支肺異形成症、肺炎、呼吸窮迫症候群等の呼吸器疾患、
m)非特異性皮膚炎、褥瘡性潰瘍、皮膚虚血、皮膚潰瘍、糖尿病性壊疽、糖尿病性皮膚潰瘍、裂傷、疥癬、強皮症、皮膚損傷、熱傷、手術創、創傷治癒等の皮膚疾患、
n)血管不全、血管再狭窄、血管炎、血管痙攣、ウェゲナー肉芽腫症等の血管疾患、
o)脱毛症、乳酸アシドーシス、四肢虚血、肝硬変、肝虚血、ミトコンドリア脳筋症、サルコイドーシス、軟部組織欠損、組織及び/又は臓器の自家移植片で治療される疾患等の他の疾患
から構成される群から選択される請求項1から5のいずれか一項に記載の血管新生低下及び/もしくは障害を伴う疾患並びに/又は血管新生率増加が治癒過程に有益となる疾患の予防及び/又は治療用ケイ素含有生分解性材料。 - ポリヒドロキシケイ酸エチルエステル化合物が少なくとも20%のエトキシ基含量をもつ請求項1から6のいずれか一項に記載の、血管新生低下及び/もしくは障害を伴う疾患並びに/又は血管新生率増加が治癒過程に有益となる、疾患の予防及び/又は治療用ケイ素含有生分解性材料。
- ポリヒドロキシケイ酸エチルエステル化合物が繊維及び/又は繊維マトリックスの形態であり、繊維及び/又は繊維マトリックスが少なくとも17%の圧縮率をもつ請求項1から7のいずれか一項に記載の、血管新生低下及び/もしくは障害を伴う疾患並びに/又は血管新生率増加が治癒過程に有益となる、疾患の予防及び/又は治療用ケイ素含有生分解性材料。
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