JP2021518479A - ポリ3,4−ジヒドロキシ−l−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル及びその使用 - Google Patents
ポリ3,4−ジヒドロキシ−l−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル及びその使用 Download PDFInfo
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- JP2021518479A JP2021518479A JP2020564078A JP2020564078A JP2021518479A JP 2021518479 A JP2021518479 A JP 2021518479A JP 2020564078 A JP2020564078 A JP 2020564078A JP 2020564078 A JP2020564078 A JP 2020564078A JP 2021518479 A JP2021518479 A JP 2021518479A
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- phenylalanine
- dihydroxy
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Abstract
Description
従って、低毒性又は無毒性の磁気共鳴造影剤の開発は、現在、早急に解決すべき課題である。
上記ポリ3,4−ジヒドロキシ−L−フェニルアラニンを含有する両親媒性ポリマーの代表的な例は、以下の構造を含む。
本発明の実施例における特性評価方法は、以下のとおりである。
ナノミセルの粒径と形状はHITACHI HT7700透過型電子顕微鏡を用いて観察した。加速電圧は100KVとした。
実施例1
(1)ポリ3,4−ジヒドロキシ−L−フェニルアラニン-ポリサルコシンブロック共重合体(PDOPA-b-PSar)の構造式は以下のとおりである。
ここで、R1はベンジル基であり、m=5〜200であり、n=5〜50である。
具体的な合成ステップは、以下の工程を含む。
実施例2
ここで、R2はメチル基であり、m=5〜200であり、n=5〜50である。
性能試験条件は、実施例1と同様とした。ミセルの平均粒径は30nmで、MRIにおける体外増強作用を有した。
実施例3
ここで、R1はn-ブチル基であり、m=5〜200であり、n1=5〜50であり、
具体的な合成ステップは、以下の工程を含む。
実施例4
ここで、m=5〜200であり、n=5〜50である。
他の性能試験条件は実施例1と同様とした。ミセルの平均粒径は35nmで、MRIにおける体外増強作用を有した。
Claims (9)
- 前記両親媒性ポリマーナノミセル中の親水性ブロックは、ポリサルコシンブロック、ポリエチレングリコールブロック、ポリ(オリゴエチレングリコール)メタクリレートブロック、ポリビニルアルコールブロック及びポリアクリル酸ブロックからなる少なくとも1種であることを特徴とする請求項1に記載のポリ3,4−ジヒドロキシ−L−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル。
- 前記両親媒性ポリマーナノミセル中の親水性ブロックのセグメントの長さは、1〜1500であり、ポリ3,4−ジヒドロキシ−L−フェニルアラニンブロックのセグメントの長さは、1〜500であることを特徴とする請求項1又は2に記載のポリ3,4−ジヒドロキシ−L−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル。
- 両親媒性ポリマーは、ポリ3,4−ジヒドロキシ−L−フェニルアラニンブロックを含むジブロック、トリブロック、マルチブロック、ランダム、星形、環形またはグラフトポリマーであることを特徴とする請求項1に記載のポリ3,4−ジヒドロキシ−L−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル。
- 前記ポリ3,4−ジヒドロキシ−L−フェニルアラニンのセグメントの長さは5〜50の範囲であり、ポリサルコシン又はポリエチレングリコールのセグメントの長さは5〜200の範囲にあることを特徴とする請求項5に記載のポリ3,4−ジヒドロキシ−L−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル。
- 請求項1に記載のポリ3,4−ジヒドロキシ−L−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセルの磁気共鳴イメージング分野における使用であって、磁気共鳴T1イメージング造影剤としての使用。
- 前記磁気共鳴T1イメージング造影剤は、ポリ3,4−ジヒドロキシ−L−フェニルアラニンキレート第二鉄イオンを含有する両親媒性ポリマーナノミセル、薬学用賦形剤、希釈剤及び補助材料を含むことを特徴とする請求項7に記載の使用。
- 前記磁気共鳴T1イメージング造影剤は、平均粒径が20〜200nmで、キレート化鉄イオンの含有量が10〜1000ppmであることを特徴とする請求項7又は8に記載の使用。
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