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  • Antisense phosphodiester oligonucleotide  (1)
  • PACS. 36.40.Ei Phase transitions in clusters- 82.30.Qt Isomerization and rearrangement- 05.20.Gg Classical ensemble theory  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Biodistribution of iodine-125 tyramine transforming growth factor α antisense oligonucleotide in athymic mice with a human mammary tumour xenograft following intratumoral injection (1996)
    Springer
    European journal of nuclear medicine 23 (1996), S. 448-452 
    Details
    ISSN: 1619-7089
    Keywords: Transforming growth factor α ; Antisense phosphodiester oligonucleotide ; Radioiodine labelling ; Biodistribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The Watson-Crick base pairing rule provides the underlying principle for the antisense (AS) approach to inhibiting gene expression. Transforming growth factor α (TGFα) was the first growth factor to be associated with tumorigenesis, thus making the TGFα (mRNA) a potential target for AS therapy and offering the potential for monitoring of the progression of malignancy by non-invasive imaging with radiolabelled AS phosphodiester. Probe labelling and biodistribution were studied in the present report. A 23-mer oligonucleotide sequence was synthesized and grafted in 5′ with a tyramine group which was further radioiodinated. The radiolabelled AS was injected intratumorally in mammary tumour-bearing BALB/c mice (3 weeks after inoculation of 7·106 NS2T2A mammary cells). Biodistribution was monitored by sequential scintigraphy and organ radioactivity after autopsy. The 5′ tyramine group allowed specific and stable radiolabelling of the AS with125I. The125I AS oligonucleotide was rapidly cleared from the tumour by intestine and kidneys. Four hours after intratumoral injection, 6.5%±1.5% of the dose was retained in the tumour as non-degraded125I AS. It is concluded that 5′ tyraminylated AS provides information on the biodistribution of AS oligonucleotide following intratumoral injection. These data will contribute to the pharmacology of AS oligonucleotides which can be used for therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01247375
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  • 2
    Electronic Resource
    Electronic Resource
    Monte-Carlo simulations of rotating clusters (1998)
    Springer
    The European physical journal 3 (1998), S. 229-236 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 36.40.Ei Phase transitions in clusters- 82.30.Qt Isomerization and rearrangement- 05.20.Gg Classical ensemble theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A new scheme for estimating densities of states at non zero angular momentum is proposed, using the Monte-Carlo (MC) and multiple histogram methods. It is based on a rigorous expression of the classical density of states for a rotating system. Two features appear: the centrifugal energy ( angular momentum and I the instantaneous inertia tensor in the center of mass reference frame) is added to the potential energy and the configurational densities of states is weighted by . Comparing the MC results for the 13-atom Lennard-Jones cluster and a calculation based on molecular dynamics (MD) shows that this weight is important if the rotation induces a structural change at a finite temperature. The MC algorithm proves to be much more efficient than MD, even at finite .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050170
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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