JP7280353B2 - 黄斑変性予防又は治療用組成物 - Google Patents
黄斑変性予防又は治療用組成物 Download PDFInfo
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- JP7280353B2 JP7280353B2 JP2021518126A JP2021518126A JP7280353B2 JP 7280353 B2 JP7280353 B2 JP 7280353B2 JP 2021518126 A JP2021518126 A JP 2021518126A JP 2021518126 A JP2021518126 A JP 2021518126A JP 7280353 B2 JP7280353 B2 JP 7280353B2
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- neovascular
- fursultiamine
- macular degeneration
- neovascularization
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Description
(a)本発明は、フルスルチアミン(fursultiamine)又はその塩(salts)を含む、黄斑変性(macular degeneration)予防又は治療用薬剤学的組成物に関する。
(b)フルスルチアミンは、網膜色素上皮細胞で増加されたHIF-1αの発現を減少させ、脈絡膜血管内皮細胞成長を抑制する。
(c)本発明のフルスルチアミン又はその塩を含む薬剤学的組成物は、様々な新生血管性眼疾患の治療剤にも用いることができる。
新生血管性加齢黄斑変性は、脈絡膜新生血管を特徴とする。網膜又は脈絡膜の低酸素(hypoxia)環境がHIF-1α(hypoxia inducible factor1alpha)を発現させ、これが血管内皮細胞因子を促進させて脈絡膜の新生血管の発生を誘導すると知られている。このような脈絡膜内新生血管の発生は、結局、視力損傷を引き起こす。
加齢黄斑変性のex vivoモデルであるマウス脈絡膜スプラウティングアッセイ(mouse choroid sprouting assay)から、脈絡膜血管内皮細胞成長に及ぼすフルスルチアミンの効果を確認した。
ARPE-19細胞を60mm皿(dish)に分注し、1日程度付着するようにした。翌日、無血清(serum-free)培地に交換した後、フルスルチアミン塩酸塩0μM、50μM、及び100μM(Toronto research chemical)とビークル(DMSO,Sigma-Aldrich)を各細胞に濃度別に処置し、低酸素チャンバー(INVIVO2 400,Baker)に入れて1%酸素条件に露出させた。
黄斑変性の動物モデルであるレーザー誘導脈絡膜網膜病症モデルにおける薬物効能を調べるために、7~8週齢のC57ブラック/6J(C57BL/6J)マウスを使用した。フルスルチアミン(Fursultiamine)投与群と対照群(Control)をそれぞれ10匹ずつ使用し、レーザー照射1日前からレーザー照射後1週までの総8日間フルスルチアミン50mg/kgを経口投与した。対照群は、溶媒として用いた滅菌蒸留水を同じ方法で投与した。
レーザー誘導脈絡膜網膜病症モデル誘導のために、7~8週齢のC57ブラック/6J(C57BL/6J)マウスをアバチン(Avertin,Sigma-Aldrich)で麻酔し、両眼に散瞳剤(ミドリンP、テジュン製薬)を投与して瞳孔を拡張させた。アルゴンレーザー(Oculight GL,IRIDEX)を両眼に照射して1眼球当たりに4個のレーザー斑点(spot)を作った。フルスルチアミン(Fursultiamine)投与群と対照群(Control)をそれぞれ10匹ずつ使用し、レーザー照射1日前からレーザー照射後1週までの8日間フルスルチアミン50mg/kgを経口投与した。対照群は、溶媒として用いた滅菌蒸留水を同じ方法で投与した。
新生血管性加齢黄斑変性は炎症が主要病理的メカニズムであると知られており、フルスルチアミン処理によるミトコンドリア代謝回復の有無とこれによる炎症抑制効果を確認した。ミトコンドリアの代謝変化は炎症の誘発又は悪化を引き起こすこともあるので、フルスルチアミンがミトコンドリアの代謝を回復させる場合、それを炎症を伴う新生血管性眼疾患の予防又は治療に適用できると予測した。
Claims (7)
- フルスルチアミン(fursultiamine)又はその塩(salts)を含む新生血管性加齢黄斑変性(Neovascular age-related macular degeneration,Neovascular AMD)予防又は治療用薬剤学的組成物(ただし、ピリドキサミン化合物と組み合わせて用いられるものを除く。)。
- 前記薬剤学的組成物は、眼球内(intraocular)、眼球周囲(periocular)、眼球後ろ(retroorbital)、網膜下(subretinal)、網膜中心(central retinal)、中心窩外部(parafovea)、結膜下(subconjunctival)、硝子体内(intravitreous)、前房内(intracameral)、又は脈絡膜上(suprachoroidal)に投与される、請求項1に記載の薬剤学的組成物。
- フルスルチアミン(fursultiamine)又はその塩(salts)を含む新生血管性加齢黄斑変性(Neovascular age-related macular degeneration,Neovascular AMD)予防又は改善用食品組成物(ただし、ピリドキサミン化合物と組み合わせて用いられるものを除く。)。
- フルスルチアミン(fursultiamine)又はその塩(salts)を含む新生血管性眼疾患(neovascular ocular disease)予防又は治療用薬剤学的組成物(ただし、ピリドキサミン化合物と組み合わせて用いられるものを除く。)。
- 前記新生血管性眼疾患は、角膜血管新生(corneal neovascularization)、網膜血管新生(retinal neovascularization)、脈絡膜血管新生(choroidal neovascularization)、眼球内血管新生(intraocular neovascularization)、新生血管性緑内障(neovascular glaucoma)、増殖性糖尿病性網膜症(proliferative diabetic retinopathy)、新生血管性黄斑変性(neovascular macular degeneration)、又は未熟児網膜病症(retinopathy of prematurity)である、請求項4に記載の薬剤学的組成物。
- フルスルチアミン(fursultiamine)又はその塩(salts)を含む新生血管性眼疾患(neovascular ocular disease)予防又は改善用食品組成物(ただし、ピリドキサミン化合物と組み合わせて用いられるものを除く。)。
- 前記新生血管性眼疾患は、角膜血管新生(corneal neovascularization)、網膜血管新生(retinal neovascularization)、脈絡膜血管新生(choroidal neovascularization)、眼球内血管新生(intraocular neovascularization)、新生血管性緑内障(neovascular glaucoma)、増殖性糖尿病性網膜症(proliferative diabetic retinopathy)、新生血管性黄斑変性(neovascular macular degeneration)、又は未熟児網膜病症(retinopathy of prematurity)である、請求項6に記載の食品組成物。
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