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Chemical and biological evaluation of 153Sm and 166Ho complexes of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylphosphonic acid monoethylester) (H4dotpOEt)

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F08%3A00026088" target="_blank" >RIV/00216224:14310/08:00026088 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11310/08:12642

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Chemical and biological evaluation of 153Sm and 166Ho complexes of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylphosphonic acid monoethylester) (H4dotpOEt)

  • Original language description

    The novel methylphosphonic acid monoethylester (H4dotpOEt) has been synthesized and characterized and their complexes with Sm(III) and Ho(III) ions were studied. Dissociation constants of the ligand are lower than those of H4dota. The stability constantsof the Ln(III)-H4dotpOEt complexes are surprisingly much lower that those of H4dota (H4dota = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) probably due to a lower coordination ability of the phosphonate monoester groups. Acid-assisted decomplexation studies have shown that both complexes are less kinetically inert than the H4dota complexes, but still much more inert than complexes of open-chain ligands. Nevertheless, the synthesis of 153Sm and 166Ho complexes with this ligand led to stablecomplexes both in vitro and in vivo. A very low binding of these complexes to hydroxyapatite (HA) and calcified tissues was observed confirming the assumption that a fully ionized phosphonate group(s) is necessary for a strong bone affin

  • Czech name

    Chemické a biologické vyhodnocení 153Sm a 166Ho komplexů 1,4,7,10-tetraazacyklododekane-1,4,7,10-tetrakis(methylfosfonate monoethylester) (H4dotpOEt)

  • Czech description

    Nový ligand "methylphosphonic acid monoethylester (H4dotpOEt)" byl syntetizován a charakterizován a jeho komplexy s Sm(III) a Ho(III) ionty byly studovány. Disociační konstanty ligandu jsou nižší než pro analogický ligand H4dota. Konstanty stability Ln(III)-H4dotpOEt komplexů jsou překvapivě nižší než ty s H4dota (H4dota = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) ligandem pravděpodobobně v důsledku menší koordinační schopnosti fosfonate- monoesterových skupin. Studie kysele-katalyzovanédekomplexace ukazují, že oba komplexy jsou kineticky méně inertní než komplexy H4dota ligandu, ale stále více inertní než komplexy s ligandy mající otevřený řetězec. Syntéza 153Sm a 166Ho komplexů s tímto ligandem vedla k stabilním komplexům in vitro ain vivo. Velmi nízká schopnost vazby těchto komplexů na hydroxyapatite (HA) a zvápnětelých buněk byla pozorována a potvrdila, že plně ionizované skupiny jsou nezbytné pro silnou afinitu ke kostem. Oba komplexy ukazují podobné chování in v

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CA - Inorganic chemistry

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Inorganic Biochemistry

  • ISSN

    0162-0134

  • e-ISSN

  • Volume of the periodical

    102

  • Issue of the periodical within the volume

    7

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    10

  • Pages from-to

  • UT code for WoS article

    000256924600014

  • EID of the result in the Scopus database