がん病変組織を画像化して早期発見を普遍化する新規な高性能MRI造影剤の研究開発
Project/Area Number |
19650112
|
Research Category |
Grant-in-Aid for Exploratory Research
|
Allocation Type | Single-year Grants |
Research Field |
Biomedical engineering/Biological material science
|
Research Institution | Shizuoka University |
Principal Investigator |
山下 光司 静岡大学, 創造科学技術院大学院, 教授 (60110748)
|
Co-Investigator(Kenkyū-buntansha) |
阪原 晴海 浜松医科大学, 医学部, 教授 (10187031)
藤江 三千男 浜松医科大学, 医学部, 技術専門職員 (90397373)
|
Project Period (FY) |
2007 – 2008
|
Project Status |
Completed (Fiscal Year 2008)
|
Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2007: ¥1,800,000 (Direct Cost: ¥1,800,000)
|
Keywords | MRI / 血管・がん造影 / 作用機序 / 構造-活性相関 / 物理的性質 / 生体内分子認識 / 緩和率 / 基礎研究 |
Research Abstract |
当該研究の「研究の目的」及び「研究実施計画書」に沿って行った平成19~20年度の研究実績の概要を以下に記す。 糖を外殻に配置した糖デンドリマー型配位子とそのGd錯体の調製方法として次の5つのカテゴリーを組み合わせて、9パターン数十種類の新規なMRI造影剤を調製した。 カテゴリー:(a)鎖式/環式、(b)対称型/非対称型、(c)糖誘導体/非糖誘導体、(d)加水分解経路/非加水分解経路、(e)主鎖置換基/末端置換基 9パターン:(1-1)鎖式/対称/糖/非加水分解/末端、(1-2)鎖式/対称/非糖/非加水分解/末端、(1-3)鎖式/非対称/糖/非加水分解/末端、(1-4)鎖式/非対称/非糖/非加水分解/末端、(2)鎖式/対称/糖/加水分解/末端、(3)環式、(4)その他(主鎖置換、複合機能化、等) In vitro評価:パターン(2)において縦緩和率(r1)30[s^<-1>・mM^<-1>]、パターン(1-3)においてr1=24[s^<-1>・mM^<-1>]を得た(目標値r1≒35[s^<-1>・mM^<-1>]の達成率70~85%)。また、パターン(1-2)において糖以外の基によるr1増強効果(例えば、フェニル基ではr1=11[s^<-1>・mM^<-1>])を確認した。 In vivo評価:従来品Gd-DTPAと比較して顕著な優位性は次の点であった。(1)血管造影について:パターン(2)では24時間、パターン(1-1)では2時間の十分な造影効果が見られた。(2)がん造影について:パターン(2)では極めて鮮明ながんの造影(濃度1/2)ができた。また、パターン(1-3)では初期がん(1.2mm程度のがん)造影(濃度1/8)に成功した(達成率80%)。 血管貯留性・生体内分子認識:パターン(2)ではin vivo評価により強い生体内分子認識を確認した。パターン(1-1)ではin vitro評価(二次元電気泳動、放射性^<153>Gd錯体)により弱いアルブミン認識を示した。分子設計ソフトもアルブミン-造影剤相互作用を支持した。 安全性試験:3種類のGd錯体に対して毒性の問題はなかった。 当該の基礎研究の達成度は80%程度であった。パターン(1)に対しては糖及びその他の機能性残基との複合化、パターン(2)に対しては造影剤の再現性、等の今後の課題が明らかになった。
|
Report
(2 results)
Research Products
(74 results)
-
[Journal Article] Development and pharmacologic characterization of deoxybromophospha sugar derivatives with antileukemic activity2009
Author(s)
Satoki Nakamura, Mitsuji Yamashita, Daisuke Yokota, Isao Hirano, Takashi Ono, Michi Fujie, Kiyoshi Shibata, Taishi Niimi, Takuya Suyama, Kasthuraiah Maddali, Akikazu Asai, Junko Yamashita, Yukiko Iguchi, Kazunori Ohnishi
-
Journal Title
Investigational New Drugs
Volume: (in press)
Related Report
Peer Reviewed
-
-
-
[Journal Article] Preparation and characterization of phospholanes and phospha sugars as novel anti-cancer agents2008
Author(s)
Satoru Ito, Mitsuji Yamashita, Taishi Niimi, Michio Fujie, Valluru Krishna Reddy, Hirono Totsuka, Buchammagari Haritha, Maddali Kasthuraiah, Satoki Nakamura, Kazuhide Asai, Takuya Suyama, Junko Yamashita, Yukiko Iguchi, Gang Yu, Tatsuo Oshikawa
-
Journal Title
Heterocyclic Communications
Volume: (in press)
Related Report
Peer Reviewed
-
-
-
-
[Journal Article] Studies on preparation and characterization of novel MRI contrast agents for targeting organs and blood vessels2007
Author(s)
Yu Gang, M.Yamashita, K.Aoshima, M.Kobayashi, T.Kato, N.Kamikage, M.Takahashi, H.Takayanagi, T.Oshikawa, Laurent S., Burtea C., Vander Elst L., Muller R.N., Y.Takehara, H.Sakahara
-
Journal Title
Heterocyclic Communications 13(2-3)
Pages: 101-108
Related Report
Peer Reviewed
-
[Journal Article] A glycosylated complex of gadolinium,a new potential contrast agent for magnetic resonance angiography2007
Author(s)
Yu Gang, M.Yamashita, K.Aoshima, M.Takahashi, T.Oshikawa, H.Takayanagi, Laurent S., Burtea C., Vander Elst L., Muller R.N.
-
Journal Title
Bioorganic & Medicinal Chemistry Letters 17(8)
Pages: 2246-2249
Related Report
Peer Reviewed
-
-
-
-
-
-
[Presentation] Studies on Novel MRI Contrast Agents Having a Nano-sized Sugar-ball-dendrimer Flame Work for Imaging Specific Organs, Blood Vessels, and Tumors2011
Author(s)
Siva Kumar Bitragunta, Uma Ravi Sankar Arigala, Takashi Aoki, Masaki Sugiyama, Keisuke Ogawa, Nobuhisa Ozaki, Michio Fujie, Kengo Aoshima, Junko Yamashita, Mitsuji Yamashita, Yasuo Takehara, Harumi Sakahara
Organizer
2^<nd> Nano-Bio Symposium 2009
Place of Presentation
静岡
Year and Date
2011-03-06
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] SYNTHESIS AND EVALUATION OF CHEMICALLY-MODIFIED NOVEL MRICONTRAST AGENTS WITH SUGARS2008
Author(s)
Takashi Aoki, Mitsuji Yamashita, Keisuke Ogawa, Nobuhisa Ozaki, Michio Fujie, Masaki Sugiyama, Kengo Aoshima, Sayaka Mizuno, Nao Kamikage, Junko Yamashita, Gang Yu, Vallum Krishna Reddy, Tatsuo Oshikawa, Yasuo Takehara, Harumi Sakahara, Sofie Laurent, Carmen Burtea, L.Vander Elst, Robert N.Muller
Organizer
11^<th> Bratislava Symposium on Sacharides (11BSS)
Place of Presentation
Smolenice Castle, Slovakia
Year and Date
2008-09-24
Related Report
-
-
[Presentation] Research on Cancer Finding and Chemotherapy at the Early Stage---Syntheses and Evaluations of Novel Sugar-Ball-Dendrimer MRI Contrast Agents and Phospha Sugars by Sugar Modification2008
Author(s)
Mitsuji Yamashita, Takashi Aoki, Satoru Ito, Keisuke Ogawa, Nobuhisa Ozaki, Michio Fujie, Gang Yu, Kengo Aoshima, Masaki Sugiyama, Nao Kamikage, Junko Yamashita, Yasuo Takehara, Harumi Sakahara, Hisao Takayanagi, Tatsuo Oshikawa, Sofie Laurent, Carmen Burtea, L.Vander Elst, Robert N.Muller
Organizer
11^<th> Bratislava Symposium on Sacharides (11BSS)
Place of Presentation
Smolenice Castle, Slovakia
Year and Date
2008-09-21
Related Report
-
[Presentation] Research on Novel Materials for Cancer Finding and Chemotherapy at the Early Stage---Novel MRI Contrast Agents with Sugar Ball Dendrimer Structures and Novel Ant-tumor Agents with Phospha Sugar or Phosphorus Heterocyclic Structures and Their Evaluation2008
Author(s)
Mitsuji Yamashita, Michio Fujie, Kazuhide Asai, Takuya Suyama, Junko Yamashita, Satoru Ito, Valluru Krishna Reddy, Hirono Totsuka, Junko Yamashita, Keisuke Ogawa, Nobuhisa Ozaki, Satoki Nakamura, Takashi Aoki, Nobuhisa Ozaki, Gang Yu, Kengo Aoshima, Masatsugu Kobayashi, Tatsunori Kato, Nao Kamikage, Yasuo Takehara, Harumi Sakahara, Hisao Takayanagi, Tatsuo Oshikawa, Sofie Laurent, Carmen Burtea, L.Vander Elst, Robert N.Muller
Organizer
Inter-Academia 2008
Place of Presentation
Pecs, Hungary
Year and Date
2008-09-16
Related Report
-
-
-
[Presentation] Studies on Novel MRI Contrast Agents Having a Sugar-Ball-Dendrimer Flame Work for R & D of Imaging Specific Organs, Blood Vessels, and Tumors2008
Author(s)
Mitsuji Yamashita, Takashi Aoki, Keisuke Ogawa, Nobuhisa Ozaki, Michio Fujie, Krishna Reddy Valluru, Gang Yu, Kengo Aoshima, Masatsugu Kobayashi, Tatsunori Kato, Nao Kamikage, Junko Yamashita, Yasuo Takehara, Harumi Sakahara, Hisao Takayanagi, Tatsuo Oshikawa, Sofie Laurent, Carmen Burtea, L.Vander Elst, Robert N.Muller
Organizer
24^<th> International Carbohydrate Symposium (ICS) (ICS2008)
Place of Presentation
Oslo, Norway
Year and Date
2008-07-30
Related Report
-
-
[Presentation] Construction of DDS of Gd-DTPA Complex with Sugar Ball Dendrimer for Drawing Blood Vessels and Tumors by MRI2008
Author(s)
Mitsuji Yamashita, Takashi Aoki, Keisuke Ogawa, Nobuyuki Ozaki, Michio Fujie, Junko Yamashita, Kengo Aoshima, Nao Kamikage, Gang Yu, Tatsuo Oshikawa, Yasuo Takehara, Harumi Sakahara, Sophie Laurent, Carmen Burtea, L.Vander Elst, Robert N.Muller
Organizer
International Conference on Organo Metalic Chemistry (ICOMC) 2008
Place of Presentation
Rennes, France
Year and Date
2008-07-16
Related Report
-
[Presentation] RESEARCH ON CANCER FINDING AND CHEMOTHERAPY AT THE EARLY STAGE---EPOXIDATION AND BROMINATION OF 2-PHOSPHOLENES FOR PREPARATION OF PHOSPHA SUGARS AND THEIR BIOLOGICAL ACTIVITY2008
Author(s)
Mitsuji Yamashita, Michio Fujie, Taishi Niimi, Takuya Suyama, Kazuhide Asai, Satoru Ito, Valluru Krishna Reddy, Hirono Totsuka, Junko Yamashita, Keisuke Ogawa, Nobuhisa Ozaki, Satoki Nakamura
Organizer
XV International Conference on Chemistry of Phosphorus Compounds (ICCPC-XV)
Place of Presentation
Saint-Petersburg, Russia
Year and Date
2008-05-26
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-